New Carbon Materials最新文献

An electron-rich sulfur host for advanced Zn-S batteries 一种用于先进锌- s电池的富电子硫宿主

IF 5.7 3区材料科学 Q2 Materials Science

New Carbon Materials

Pub Date : 2025-10-01 DOI: 10.1016/S1872-5805(25)60970-X

Jia-jun CHEN , Yang XU , Zhen-xin ZHAO , Ming-fan LIANG , Jie DING , Yu-chen YE , Qing-yuan XIAO , Xiao-min WANG

Aqueous Zn-S batteries have shown great potential in advanced energy storage systems due to their low cost, high theoretical capacity, and intrinsic safety. However, the slow kinetics and low electrical conductivity of sulfur prevent the full use of their capacity, leading to poor cycling performance. We used graphite carbon nitride (g-C3N4) as the nitrogen source, and nitrogen-doped Ketjenblack (NKB) was synthesized by solid-phase calcination for use as the sulfur host. Results demonstrate that pyrrolic nitrogen serves as the primary catalytic active site in the sulfur reduction process. The high electronegativity of nitrogen significantly alters the charge distribution of the carbon matrix, changing the electron distribution around sulfur and rendering it electron-rich, which increases the interaction between S and Zn2+ and accelerates the reduction kinetics. NKB also forms a three-dimensional cross-linked carbon sphere network, providing abundant defect sites and a large specific surface area, which facilitates electron transfer and improves electrolyte wettability. Combined with the contribution of the ZnI2 additive, the Zn-S battery prepared with the precursor of a g-C3N4∶KB ratio of 3∶4 achieved an ultrahigh discharge capacity of 2069 mAh g−1 at a current density of 1 A/g. It also had an excellent rate performance (1257 mAh g−1 at 10 A/g) and a long cycling stability (705 mAh g−1 after 180 cycles at 5 A/g). This study provides a simple and effective strategy for improving the reduction kinetics of the sulfur cathode in Zn-S batteries and designing advanced cathode materials.

Download: Download high-res image (109KB)
Download: Download full-size image

锌硫水溶液电池具有成本低、理论容量大、本质安全等优点，在先进储能系统中具有很大的应用潜力。然而，硫的慢动力学和低电导率阻碍了其容量的充分利用，导致循环性能差。以石墨氮化碳（g-C3N4）为氮源，采用固相煅烧法合成氮掺杂Ketjenblack （NKB）作为硫载体。结果表明，在硫还原过程中，吡咯氮是一级催化活性位点。氮的高电负性显著改变了碳基体的电荷分布，改变了硫周围的电子分布，使其富电子，从而增加了S与Zn2+的相互作用，加速了还原动力学。NKB还形成了三维交联碳球网络，提供了丰富的缺陷位点和大的比表面积，有利于电子转移，提高了电解质的润湿性。再加上ni - 2添加剂的贡献，以g- c3n4∶KB比为3∶4的前驱体制备的Zn-S电池在电流密度为1 a /g时，放电容量达到2069 mAh g−1。它还具有出色的倍率性能（10a /g时1257 mAh g - 1）和长循环稳定性（5a /g下180次循环后705 mAh g - 1）。该研究为改善锌硫电池中硫阴极的还原动力学和设计先进的阴极材料提供了一种简单有效的策略。下载：下载高清图片（109KB）下载：下载全尺寸图片

{"title":"An electron-rich sulfur host for advanced Zn-S batteries","authors":"Jia-jun CHEN , Yang XU , Zhen-xin ZHAO , Ming-fan LIANG , Jie DING , Yu-chen YE , Qing-yuan XIAO , Xiao-min WANG","doi":"10.1016/S1872-5805(25)60970-X","DOIUrl":"10.1016/S1872-5805(25)60970-X","url":null,"abstract":"<div><div>Aqueous Zn-S batteries have shown great potential in advanced energy storage systems due to their low cost, high theoretical capacity, and intrinsic safety. However, the slow kinetics and low electrical conductivity of sulfur prevent the full use of their capacity, leading to poor cycling performance. We used graphite carbon nitride (g-C3N4) as the nitrogen source, and nitrogen-doped Ketjenblack (NKB) was synthesized by solid-phase calcination for use as the sulfur host. Results demonstrate that pyrrolic nitrogen serves as the primary catalytic active site in the sulfur reduction process. The high electronegativity of nitrogen significantly alters the charge distribution of the carbon matrix, changing the electron distribution around sulfur and rendering it electron-rich, which increases the interaction between S and Zn2+ and accelerates the reduction kinetics. NKB also forms a three-dimensional cross-linked carbon sphere network, providing abundant defect sites and a large specific surface area, which facilitates electron transfer and improves electrolyte wettability. Combined with the contribution of the ZnI2 additive, the Zn-S battery prepared with the precursor of a g-C3N4∶KB ratio of 3∶4 achieved an ultrahigh discharge capacity of 2069 mAh g−1 at a current density of 1 A/g. It also had an excellent rate performance (1257 mAh g−1 at 10 A/g) and a long cycling stability (705 mAh g−1 after 180 cycles at 5 A/g). This study provides a simple and effective strategy for improving the reduction kinetics of the sulfur cathode in Zn-S batteries and designing advanced cathode materials.</div><div><span><figure><span><img><ol><li><span><span>Download: <span>Download high-res image (109KB)</span></span></span></li><li><span><span>Download: <span>Download full-size image</span></span></span></li></ol></span></figure></span></div></div>","PeriodicalId":19719,"journal":{"name":"New Carbon Materials","volume":"40 5","pages":"Pages 1074-1084"},"PeriodicalIF":5.7,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145448766","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A dual-surfactant template system for fabricating N-doped porous carbon nanorods for use as supercapacitor electrodes 制备超级电容器电极用n掺杂多孔碳纳米棒的双表面活性剂模板体系

IF 5.7 3区材料科学 Q2 Materials Science

New Carbon Materials

Pub Date : 2025-10-01 DOI: 10.1016/S1872-5805(25)61006-7

Chao-ran PANG , Tian-wei WANG , Cai-cheng SONG , Hua LIN , Wen-jin YAN , Peng WANG , Long-ming CHEN , Ying-xin HU , Rong-wen LU , Shu-fen ZHANG

The ability to control the preparation of one-dimensional (1D) porous carbon nanorods, especially during rapid polymerization, is key to their practical application. We report a method for synthesizing 1D porous carbon nanorods, characterized by the formation of rod-like micelles that are assembled from sodium palmitate and Pluronic F127, facilitated by protonated melamine, and subsequently converted into melamine-based N-doped polymer nanorods which were carbonized to produce the corresponding N-doped carbon nanorods. The specific capacitance of the supercapacitor used the as-prepared N-doped nanorods as electrode material in a three-electrode system was calculated to be 301.66 F g−1 at a current density of 0.2 A g−1, with an ultra-high specific surface area normalized capacitance of up to 67.07 μF cm−2. The N-doping and their one-dimensionality give the nanorods a low internal resistance and good stability, making them well suited for fundamental studies and practical applications ranging from materials chemistry to electrochemical energy storage.

Download: Download high-res image (135KB)
Download: Download full-size image

控制一维（1D）多孔碳纳米棒制备的能力，特别是在快速聚合过程中，是其实际应用的关键。我们报道了一种合成一维多孔碳纳米棒的方法，其特点是由棕榈酸钠和Pluronic F127组装形成棒状胶束，在质子化三聚氰胺的促进下，随后转化为三聚氰胺基n掺杂聚合物纳米棒，并将其碳化以产生相应的n掺杂碳纳米棒。在电流密度为0.2 a g−1时，以掺n纳米棒为电极材料制备的超级电容器的比电容为301.66 F g−1，具有高达67.07 μF cm−2的超高比表面积归一化电容。n掺杂及其一维性使纳米棒具有低内阻和良好的稳定性，使其非常适合从材料化学到电化学储能的基础研究和实际应用。下载：下载高分辨率图片（135KB）下载：下载全尺寸图片

{"title":"A dual-surfactant template system for fabricating N-doped porous carbon nanorods for use as supercapacitor electrodes","authors":"Chao-ran PANG , Tian-wei WANG , Cai-cheng SONG , Hua LIN , Wen-jin YAN , Peng WANG , Long-ming CHEN , Ying-xin HU , Rong-wen LU , Shu-fen ZHANG","doi":"10.1016/S1872-5805(25)61006-7","DOIUrl":"10.1016/S1872-5805(25)61006-7","url":null,"abstract":"<div><div>The ability to control the preparation of one-dimensional (1D) porous carbon nanorods, especially during rapid polymerization, is key to their practical application. We report a method for synthesizing 1D porous carbon nanorods, characterized by the formation of rod-like micelles that are assembled from sodium palmitate and Pluronic F127, facilitated by protonated melamine, and subsequently converted into melamine-based N-doped polymer nanorods which were carbonized to produce the corresponding N-doped carbon nanorods. The specific capacitance of the supercapacitor used the as-prepared N-doped nanorods as electrode material in a three-electrode system was calculated to be 301.66 F g−1 at a current density of 0.2 A g−1, with an ultra-high specific surface area normalized capacitance of up to 67.07 μF cm−2. The N-doping and their one-dimensionality give the nanorods a low internal resistance and good stability, making them well suited for fundamental studies and practical applications ranging from materials chemistry to electrochemical energy storage.</div><div><span><figure><span><img><ol><li><span><span>Download: <span>Download high-res image (135KB)</span></span></span></li><li><span><span>Download: <span>Download full-size image</span></span></span></li></ol></span></figure></span></div></div>","PeriodicalId":19719,"journal":{"name":"New Carbon Materials","volume":"40 5","pages":"Pages 1123-1134"},"PeriodicalIF":5.7,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145448770","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A graphene composite aerogel with a high thermal conductivity, compressibility and flexibility meets the requirements of phase-change materials for rigid-flexible material innovation 具有高导热性、高压缩性和高柔韧性的石墨烯复合气凝胶，满足相变材料对刚柔材料创新的要求

IF 5.7 3区材料科学 Q2 Materials Science

New Carbon Materials

Pub Date : 2025-10-01 DOI: 10.1016/S1872-5805(25)60977-2

Jia-ming CUI, Yi-xing CHEN, Wen-tao XU, Sheng WANG

Oriented graphene aerogels have limited applications because the flexibility of their graphene sheets and microstructure give them a low skeleton strength, insufficient compression resilience, and poor flexibility. We report the preparation of novel aerogel materials with a much better performance. Using the driving force of graphene oxide (GO) self-assembly and π-π interactions, carbon nanotubes (CNTs) were attached to the GO sheets, and an oriented composite carbon skeleton was constructed using “hydro-plastic foaming”. The introduction of CNTs significantly increased the strength of the skeleton and gave the aerogel an excellent reversible compressibility. The innovative use of cold pressing greatly improved the thermal conductivity and flexibility of the aerogel, providing new ideas for the development of high-performance aerogels. Tests show that the obtained graphene composite aerogel has a reversible compressive strain of over 90% and can withstand 500 compression cycles along the direction of pore accumulation. It can endure more than 10 000 bending cycles perpendicular to the direction of composite carbon layer stacking, and its in-plane thermal conductivity reaches 64.5 W·m−1·K−1. When filled with phase change materials, the high porosity of the carbon skeleton enables the material to have a high phase change filling rate, and its phase change enthalpy is greater than 150 J/g. Thanks to the exceptional flexibility of the carbon skeleton, the macrostructure of phase change materials can be bent as needed to adapt to thermal management scenarios and conform to device shapes. This significantly enhances practical application compatibility, providing flexible support for temperature control and thermal management across diverse device forms.

Download: Download high-res image (149KB)
Download: Download full-size image

定向石墨烯气凝胶的应用有限，因为其石墨烯片的柔韧性和微观结构使其骨架强度低，压缩回弹性不足，柔韧性差。我们报道了一种性能更好的新型气凝胶材料的制备。利用氧化石墨烯（GO）自组装和π-π相互作用的驱动力，将碳纳米管（CNTs）附着在氧化石墨烯薄片上，采用“水塑发泡”的方法构建了定向复合碳骨架。碳纳米管的引入显著提高了骨架的强度，并使气凝胶具有优异的可逆压缩性。冷压技术的创新使用大大提高了气凝胶的导热性和柔韧性，为高性能气凝胶的开发提供了新的思路。实验表明，制备的石墨烯复合气凝胶具有90%以上的可逆压缩应变，可承受沿孔隙堆积方向的500次压缩循环。垂直于复合碳层堆叠方向的弯曲次数可达10000次以上，其面内导热系数达到64.5 W·m−1·K−1。当填充相变材料时，碳骨架的高孔隙率使材料具有较高的相变填充率，其相变焓大于150 J/g。由于碳骨架具有特殊的灵活性，相变材料的宏观结构可以根据需要弯曲，以适应热管理场景并符合器件形状。这大大提高了实际应用的兼容性，为不同设备形式的温度控制和热管理提供了灵活的支持。下载：下载高分辨率图片（149KB）下载：下载全尺寸图片

{"title":"A graphene composite aerogel with a high thermal conductivity, compressibility and flexibility meets the requirements of phase-change materials for rigid-flexible material innovation","authors":"Jia-ming CUI, Yi-xing CHEN, Wen-tao XU, Sheng WANG","doi":"10.1016/S1872-5805(25)60977-2","DOIUrl":"10.1016/S1872-5805(25)60977-2","url":null,"abstract":"<div><div>Oriented graphene aerogels have limited applications because the flexibility of their graphene sheets and microstructure give them a low skeleton strength, insufficient compression resilience, and poor flexibility. We report the preparation of novel aerogel materials with a much better performance. Using the driving force of graphene oxide (GO) self-assembly and π-π interactions, carbon nanotubes (CNTs) were attached to the GO sheets, and an oriented composite carbon skeleton was constructed using “hydro-plastic foaming”. The introduction of CNTs significantly increased the strength of the skeleton and gave the aerogel an excellent reversible compressibility. The innovative use of cold pressing greatly improved the thermal conductivity and flexibility of the aerogel, providing new ideas for the development of high-performance aerogels. Tests show that the obtained graphene composite aerogel has a reversible compressive strain of over 90% and can withstand 500 compression cycles along the direction of pore accumulation. It can endure more than 10 000 bending cycles perpendicular to the direction of composite carbon layer stacking, and its in-plane thermal conductivity reaches 64.5 W·m−1·K−1. When filled with phase change materials, the high porosity of the carbon skeleton enables the material to have a high phase change filling rate, and its phase change enthalpy is greater than 150 J/g. Thanks to the exceptional flexibility of the carbon skeleton, the macrostructure of phase change materials can be bent as needed to adapt to thermal management scenarios and conform to device shapes. This significantly enhances practical application compatibility, providing flexible support for temperature control and thermal management across diverse device forms.</div><div><span><figure><span><img><ol><li><span><span>Download: <span>Download high-res image (149KB)</span></span></span></li><li><span><span>Download: <span>Download full-size image</span></span></span></li></ol></span></figure></span></div></div>","PeriodicalId":19719,"journal":{"name":"New Carbon Materials","volume":"40 5","pages":"Pages 1136-1152"},"PeriodicalIF":5.7,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145448772","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Coating super-crosslinked polycyclic aromatic molecules on hard carbon microspheres for a sodium-ion battery anode 钠离子电池负极用硬碳微球包覆超交联多环芳香族分子

IF 5.7 3区材料科学 Q2 Materials Science

New Carbon Materials

Pub Date : 2025-10-01 DOI: 10.1016/S1872-5805(25)60983-8

Yong-hong YE , Xing-bo YU , Guo-li ZHANG , Hui-hui LI , Sheng-qin GUAN , Jian-long WANG , Kai-xi LI , Tao-tao GUAN

Sodium-ion batteries (SIBs) have emerged as a promising contender for next-generation energy storage systems. Hard carbon is regarded as the most promising anode for commercial SIB, however, the large number of defects on its surface cause irreversible electrolyte consumption and an uneven solid electrolyte interphase film. An advanced molecular engineering strategy to coat hard carbon with polycyclic aromatic molecules is reported. Specifically, polystyrene-based carbon microspheres (CSs) were first synthesized and then coated with polycyclic aromatic molecules derived from coal tar pitch by spray-drying and followed by oxidation. Compared to the traditional CVD coating method, this molecular framework strategy has been shown to reduce the number of defects on the surface of CSs without sacrificing internal storage sites and suppressing transport kinetics in hosting the sodium ions. Besides the lower surface defect concentration, the synthesized hybrid carbon microspheres (HCSs) have a larger grain size and more abundant closed pores, and have a higher reversible sodium storage capacity. A HCS-P-60% electrode has a capacity of 332.3 mAh g−1 with an initial Coulombic efficiency of 88.5%. It also has a superior rate performance of 246.6 mAh g−1 at 2 C and a 95.2% capacity retention after 100 cycles at 0.2 C. This work offers new insights into designing high-performance hard carbon microsphere anodes, advancing the commercialization of sodium-ion batteries.

Download: Download high-res image (149KB)
Download: Download full-size image

钠离子电池（sib）已成为下一代储能系统的有力竞争者。硬碳被认为是最有前途的商业SIB阳极，但其表面大量的缺陷导致了不可逆的电解质消耗和不均匀的固体电解质界面膜。报道了一种用多环芳香族分子包覆硬碳的先进分子工程策略。首先合成了聚苯乙烯基碳微球（CSs），然后通过喷雾干燥和氧化法制备了从煤焦油沥青中提取的多环芳香族分子。与传统的CVD涂层方法相比，这种分子框架策略已被证明可以减少CSs表面缺陷的数量，而不会牺牲内部存储位置和抑制承载钠离子的运输动力学。合成的杂化碳微球除了具有较低的表面缺陷浓度外，还具有更大的晶粒尺寸和更丰富的闭孔，具有更高的可逆储钠能力。HCS-P-60%电极的容量为332.3 mAh g−1，初始库仑效率为88.5%。它在2℃下具有246.6 mAh g - 1的倍率性能，在0.2℃下循环100次后容量保持率为95.2%。这项工作为设计高性能硬碳微球阳极提供了新的见解，推动了钠离子电池的商业化。下载：下载高分辨率图片（149KB）下载：下载全尺寸图片

{"title":"Coating super-crosslinked polycyclic aromatic molecules on hard carbon microspheres for a sodium-ion battery anode","authors":"Yong-hong YE , Xing-bo YU , Guo-li ZHANG , Hui-hui LI , Sheng-qin GUAN , Jian-long WANG , Kai-xi LI , Tao-tao GUAN","doi":"10.1016/S1872-5805(25)60983-8","DOIUrl":"10.1016/S1872-5805(25)60983-8","url":null,"abstract":"<div><div>Sodium-ion batteries (SIBs) have emerged as a promising contender for next-generation energy storage systems. Hard carbon is regarded as the most promising anode for commercial SIB, however, the large number of defects on its surface cause irreversible electrolyte consumption and an uneven solid electrolyte interphase film. An advanced molecular engineering strategy to coat hard carbon with polycyclic aromatic molecules is reported. Specifically, polystyrene-based carbon microspheres (CSs) were first synthesized and then coated with polycyclic aromatic molecules derived from coal tar pitch by spray-drying and followed by oxidation. Compared to the traditional CVD coating method, this molecular framework strategy has been shown to reduce the number of defects on the surface of CSs without sacrificing internal storage sites and suppressing transport kinetics in hosting the sodium ions. Besides the lower surface defect concentration, the synthesized hybrid carbon microspheres (HCSs) have a larger grain size and more abundant closed pores, and have a higher reversible sodium storage capacity. A HCS-P-60% electrode has a capacity of 332.3 mAh g−1 with an initial Coulombic efficiency of 88.5%. It also has a superior rate performance of 246.6 mAh g−1 at 2 C and a 95.2% capacity retention after 100 cycles at 0.2 C. This work offers new insights into designing high-performance hard carbon microsphere anodes, advancing the commercialization of sodium-ion batteries.</div><div><span><figure><span><img><ol><li><span><span>Download: <span>Download high-res image (149KB)</span></span></span></li><li><span><span>Download: <span>Download full-size image</span></span></span></li></ol></span></figure></span></div></div>","PeriodicalId":19719,"journal":{"name":"New Carbon Materials","volume":"40 5","pages":"Pages 1098-1112"},"PeriodicalIF":5.7,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145448768","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Structural and electronic properties of nitrogen-doped ultrananocrys-talline diamond films grown by microwave plasma CVD 微波等离子体CVD生长氮掺杂超晶金刚石薄膜的结构和电子性能

IF 5.7 3区材料科学 Q2 Materials Science

New Carbon Materials

Pub Date : 2025-10-01 DOI: 10.1016/S1872-5805(25)60974-7

Venkateswara Rao Sodisetti , Bhattacharyya Somnath

Nitrogen doping in chemical vapor deposition-derived ultrananocrystalline diamond (UNCD) films increases the electronic conductivity, yet its microstructural effects on electron transport are insufficiently understood. We investigated the formation of nitrogen-induced diaphite structures (hybrid diamond-graphite phases) and their role in changing the conductivity. Nitrogen doping in a hydrogen- rich plasma environment promotes the emergence of unique sp3-sp2 bonding interfaces, where diamond grains are covalently integrated with graphitic domains, facilitating a structure-driven electronic transition. High-resolution transmission electron microscopy and selected area electron diffraction reveal five-fold, six-fold and twelve-fold symmetries, along with an atypical {200} crystallographic reflection, confirming diaphite formation in 5% and 10% N-doped UNCD films, while higher doping levels (15% and 20%) result in extensive graphitization. Raman spectroscopy tracks the evolution of sp2 bonding with increasing nitrogen content, while atomic force microscopy and X-ray diffraction indicate a consistent diamond grain size of ~8 nm. Cryogenic electronic transport measurements reveal a conductivity increase from 8.72 to 708 S/cm as the nitrogen doping level increases from 5% to 20%, which is attributed to defect-mediated carrier transport and 3D weak localization. The resulting conductivity is three orders of magnitude higher than previously reported. These findings establish a direct correlation between diaphite structural polymorphism and tunable electronic properties in nitrogen-doped UNCD films, offering new ways for defect-engineering diamond-based electronic materials.

Download: Download high-res image (107KB)
Download: Download full-size image

氮掺杂在化学气相沉积衍生的超晶金刚石（UNCD）薄膜中增加了电子导电性，但其微观结构对电子传递的影响尚不清楚。我们研究了氮诱导晶片结构（杂化金刚石-石墨相）的形成及其在改变电导率中的作用。富氢等离子体环境中的氮掺杂促进了独特的sp3-sp2键界面的出现，其中金刚石颗粒与石墨畴共价集成，促进了结构驱动的电子跃迁。高分辨率透射电子显微镜和选择区域电子衍射显示五倍、六倍和十二倍的对称性，以及非典型的{200}晶体反射，证实在5%和10% n掺杂的UNCD薄膜中形成了横波，而更高的掺杂水平（15%和20%）导致广泛的石墨化。拉曼光谱追踪了sp2键随氮含量增加的演化过程，而原子力显微镜和x射线衍射表明，金刚石的晶粒尺寸一致为~8 nm。低温电子输运测量表明，当氮掺杂水平从5%增加到20%时，电导率从8.72增加到708 S/cm，这是由于缺陷介导的载流子输运和三维弱定位。由此产生的电导率比先前报道的高三个数量级。这些发现建立了氮掺杂UNCD薄膜中隔膜结构多态性与可调谐电子性能之间的直接关联，为缺陷工程的金刚石基电子材料提供了新的途径。下载：下载高清图片（107KB）下载：下载全尺寸图片

{"title":"Structural and electronic properties of nitrogen-doped ultrananocrys-talline diamond films grown by microwave plasma CVD","authors":"Venkateswara Rao Sodisetti , Bhattacharyya Somnath","doi":"10.1016/S1872-5805(25)60974-7","DOIUrl":"10.1016/S1872-5805(25)60974-7","url":null,"abstract":"<div><div>Nitrogen doping in chemical vapor deposition-derived ultrananocrystalline diamond (UNCD) films increases the electronic conductivity, yet its microstructural effects on electron transport are insufficiently understood. We investigated the formation of nitrogen-induced diaphite structures (hybrid diamond-graphite phases) and their role in changing the conductivity. Nitrogen doping in a hydrogen- rich plasma environment promotes the emergence of unique sp3-sp2 bonding interfaces, where diamond grains are covalently integrated with graphitic domains, facilitating a structure-driven electronic transition. High-resolution transmission electron microscopy and selected area electron diffraction reveal five-fold, six-fold and twelve-fold symmetries, along with an atypical {200} crystallographic reflection, confirming diaphite formation in 5% and 10% N-doped UNCD films, while higher doping levels (15% and 20%) result in extensive graphitization. Raman spectroscopy tracks the evolution of sp2 bonding with increasing nitrogen content, while atomic force microscopy and X-ray diffraction indicate a consistent diamond grain size of ~8 nm. Cryogenic electronic transport measurements reveal a conductivity increase from 8.72 to 708 S/cm as the nitrogen doping level increases from 5% to 20%, which is attributed to defect-mediated carrier transport and 3D weak localization. The resulting conductivity is three orders of magnitude higher than previously reported. These findings establish a direct correlation between diaphite structural polymorphism and tunable electronic properties in nitrogen-doped UNCD films, offering new ways for defect-engineering diamond-based electronic materials.</div><div><span><figure><span><img><ol><li><span><span>Download: <span>Download high-res image (107KB)</span></span></span></li><li><span><span>Download: <span>Download full-size image</span></span></span></li></ol></span></figure></span></div></div>","PeriodicalId":19719,"journal":{"name":"New Carbon Materials","volume":"40 5","pages":"Pages 1169-1183"},"PeriodicalIF":5.7,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145448774","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A thermally-cyclized electrospun GO/PAN nanofiber piezoelectric sensor for high-temperature applications 用于高温应用的热循环电纺丝氧化石墨烯/PAN纳米纤维压电传感器

IF 5.7 3区材料科学 Q2 Materials Science

New Carbon Materials

Pub Date : 2025-10-01 DOI: 10.1016/S1872-5805(25)60985-1

Wei-dong LI , Yin-hui LI , Rong-yan YIN , Kai FAN , Fei GAO , Jian-guo LIANG , Peng-wei LI , Gui-bin BIAN

High-temperature piezoelectric sensors are very important in severe environments such as fire safety, aerospace and oil drills, however, most current sensors are not heat resistant (<300 °C) and are fragile, which limits their use, especially in high-temperature environments. A high-temperature resistant flexible piezoelectric film based on graphene oxide (GO)/polyacrylonitrile (PAN) composites was prepared by electrospinning and thermal treatment. It was packed into a micro-device, which could work continuously at 500 °C. The introduction of GO significantly increased the mechanical properties of the PAN nanofibers because the oxygen-containing functional groups (electronegative groups) on the surface of the GO initiated a nucleophilic attack on the PAN molecule during heat treatment, enabling the GO to initiate the cyclization of the PAN at lower heat-treatment temperatures. In addition, the abundant oxygen-containing functional groups on GO acted as pro-oxidants to hasten the oxidation of PAN during heat treatment. The effects of GO content and heat treatment temperature on the properties of the nanofiber films were investigated. A GO/PAN nanofiber piezoelectric sensor heat-treated at 300 °C had a 9.10 V and 2.25 μA peak output, which are respectively 101.3% and 78.6% higher than those of the untreated films. Cyclic testing over 5000 cycles at 350 °C confirmed the stable output performance of the GO/PAN nanofiber piezoelectric sensor. Furthermore, a sensor heat-treated at 400 °C had a sensitivity of 1.7 V/N, which is 83.5% higher than that of an untreated one. The results show that the prepared GO/PAN nanofiber piezoelectric sensor combines high temperature resistance, high flexibility, stability and high sensitivity, and may have broad applications in high temperature environments such as the aerospace and petroleum industries.

Download: Download high-res image (169KB)
Download: Download full-size image

高温压电传感器在消防安全、航空航天和石油钻井等恶劣环境中非常重要，然而，目前大多数传感器不耐热（<300°C）且易碎，这限制了它们的使用，特别是在高温环境中。采用静电纺丝和热处理法制备了氧化石墨烯/聚丙烯腈复合材料的耐高温柔性压电薄膜。它被封装在一个微型装置中，可以在500°C下连续工作。氧化石墨烯的引入显著提高了PAN纳米纤维的机械性能，因为氧化石墨烯表面的含氧官能团（电负性基团）在热处理过程中引发了PAN分子的亲核攻击，使氧化石墨烯在较低的热处理温度下引发PAN的环化。此外，氧化石墨烯上丰富的含氧官能团作为促氧化剂，加速了PAN在热处理过程中的氧化。研究了氧化石墨烯含量和热处理温度对纳米纤维薄膜性能的影响。经过300℃热处理的GO/PAN纳米纤维压电传感器的峰值输出分别为9.10 V和2.25 μA，分别比未处理薄膜高101.3%和78.6%。在350℃下进行了超过5000次的循环测试，证实了GO/PAN纳米纤维压电传感器的稳定输出性能。此外，在400°C下热处理的传感器灵敏度为1.7 V/N，比未处理的传感器高83.5%。结果表明，制备的氧化石墨烯/聚丙烯腈纳米纤维压电传感器具有耐高温、高柔韧性、稳定性和高灵敏度等特点，在航空航天、石油工业等高温环境中具有广泛的应用前景。下载：下载高清图片（169KB）下载：下载全尺寸图片

{"title":"A thermally-cyclized electrospun GO/PAN nanofiber piezoelectric sensor for high-temperature applications","authors":"Wei-dong LI , Yin-hui LI , Rong-yan YIN , Kai FAN , Fei GAO , Jian-guo LIANG , Peng-wei LI , Gui-bin BIAN","doi":"10.1016/S1872-5805(25)60985-1","DOIUrl":"10.1016/S1872-5805(25)60985-1","url":null,"abstract":"<div><div>High-temperature piezoelectric sensors are very important in severe environments such as fire safety, aerospace and oil drills, however, most current sensors are not heat resistant (<300 °C) and are fragile, which limits their use, especially in high-temperature environments. A high-temperature resistant flexible piezoelectric film based on graphene oxide (GO)/polyacrylonitrile (PAN) composites was prepared by electrospinning and thermal treatment. It was packed into a micro-device, which could work continuously at 500 °C. The introduction of GO significantly increased the mechanical properties of the PAN nanofibers because the oxygen-containing functional groups (electronegative groups) on the surface of the GO initiated a nucleophilic attack on the PAN molecule during heat treatment, enabling the GO to initiate the cyclization of the PAN at lower heat-treatment temperatures. In addition, the abundant oxygen-containing functional groups on GO acted as pro-oxidants to hasten the oxidation of PAN during heat treatment. The effects of GO content and heat treatment temperature on the properties of the nanofiber films were investigated. A GO/PAN nanofiber piezoelectric sensor heat-treated at 300 °C had a 9.10 V and 2.25 μA peak output, which are respectively 101.3% and 78.6% higher than those of the untreated films. Cyclic testing over 5000 cycles at 350 °C confirmed the stable output performance of the GO/PAN nanofiber piezoelectric sensor. Furthermore, a sensor heat-treated at 400 °C had a sensitivity of 1.7 V/N, which is 83.5% higher than that of an untreated one. The results show that the prepared GO/PAN nanofiber piezoelectric sensor combines high temperature resistance, high flexibility, stability and high sensitivity, and may have broad applications in high temperature environments such as the aerospace and petroleum industries.</div><div><span><figure><span><img><ol><li><span><span>Download: <span>Download high-res image (169KB)</span></span></span></li><li><span><span>Download: <span>Download full-size image</span></span></span></li></ol></span></figure></span></div></div>","PeriodicalId":19719,"journal":{"name":"New Carbon Materials","volume":"40 5","pages":"Pages 1154-1168"},"PeriodicalIF":5.7,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145448773","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A dataset for the structure and electrochemical performance of hard carbon as anodes for sodium-ion batteries 钠离子电池阳极用硬碳结构和电化学性能数据集

IF 5.7 3区材料科学 Q2 Materials Science

New Carbon Materials

Pub Date : 2025-10-01 DOI: 10.1016/S1872-5805(25)61004-3

Wei-yan HOU , Zong-lin YI , Wan-ru JIA , Hong-tao YU , Li-qin DAI , Jun-jie YANG , Jing-peng CHEN , Li-jing XIE , Fang-yuan SU , Cheng-meng CHEN

This data set collects, compares and contrasts the capacities and structures of a series of hard carbon materials, and then searches for correlations between structure and electrochemical performance. The capacity data of the hard carbons were obtained by charge/discharge tests and the materials were characterized by XRD, gas adsorption, true density tests and SAXS. In particular, the fitting of SAXS gave a series of structural parameters which showed good characterization. The related test details are given with the structural data of the hard carbons and the electrochemical performance of the sodium-ion batteries.

Download: Download high-res image (40KB)
Download: Download full-size image

该数据集收集、比较和对比了一系列硬碳材料的容量和结构，然后寻找结构与电化学性能之间的相关性。通过充放电测试获得了硬质碳的容量数据，并通过XRD、气体吸附、真密度测试和SAXS对材料进行了表征。特别地，SAXS的拟合得到了一系列具有良好表征的结构参数。结合硬碳的结构数据和钠离子电池的电化学性能，给出了相关的试验细节。下载：下载高清图片（40KB）下载：下载全尺寸图片

引用次数: 0

Methods for the formation of M-Nx -C active sites on single-atom catalysts and their role in persulfate activation by non-radical paths 单原子催化剂上M-Nx -C活性位点的形成方法及其在过硫酸盐非自由基活化中的作用

IF 5.7 3区材料科学 Q2 Materials Science

New Carbon Materials

Pub Date : 2025-10-01 DOI: 10.1016/S1872-5805(25)60978-4

Wen-hao SI , Jin-xuan SI , Kang-jun WANG , Fei QI , Jia-bin CHEN , Ze-quan ZENG , Zhang-gen HUANG

In recent years, numerous single-atom catalysts (SACs) have been synthesized to activate persulfate (PS) by a non-radical pathway because of its high selectivity, and activity for the catalyst. Metal-nitrogen-carbon (MNx-C) has been identified as the key active site in SACs. Although methods for preparing SACs have been extensively reported, a systematic summary of the direct construction of M-Nx-C, especially unconventional metal-nitrogen-carbon (UM-Nx-C, x≠4), on SACs for PS non-radical activation has still not been reported. The role of the M-Nx-C active sites on PS non-radical activation is discussed and methods for the formation of M-Nx-C and UM-Nx-C active sites in SACs and the effect of catalyst carriers such as carbon nitride (g-C3N4), MOFs, COFs, and other carbon materials are reviewed. Direct and indirect methods, especially for UM-Nx-C active site formation, are also elaborated. Factors affecting the formation of a M-Nx-C active site on SACs are also discussed. Prospects for the use of M-Nx-C active sites for the non-radical activation of PS by SACs to remove organic contaminants from wastewater are evaluated.

Download: Download high-res image (164KB)
Download: Download full-size image

近年来，由于过硫酸盐（PS）具有较高的选择性和催化活性，许多单原子催化剂（SACs）通过非自由基途径被合成。金属-氮-碳（MNx-C）是SACs的关键活性位点。尽管制备SACs的方法已被广泛报道，但系统地总结了M-Nx-C，特别是非常规金属-氮-碳（UM-Nx-C, x≠4）在SACs上直接构建用于PS非自由基活化的方法尚未见报道。讨论了M-Nx-C活性位点在PS非自由基活化中的作用，综述了SACs中M-Nx-C和UM-Nx-C活性位点的形成方法以及催化剂载体如氮化碳（g-C3N4）、mof、COFs和其他碳材料的影响。本文还阐述了直接和间接方法，特别是UM-Nx-C活性位点的形成。还讨论了影响SACs上M-Nx-C活性位点形成的因素。展望了M-Nx-C活性位点在活性炭非自由基活化PS去除废水中有机污染物中的应用前景。下载：下载高清图片（164KB）下载：下载全尺寸图片

{"title":"Methods for the formation of M-Nx -C active sites on single-atom catalysts and their role in persulfate activation by non-radical paths","authors":"Wen-hao SI , Jin-xuan SI , Kang-jun WANG , Fei QI , Jia-bin CHEN , Ze-quan ZENG , Zhang-gen HUANG","doi":"10.1016/S1872-5805(25)60978-4","DOIUrl":"10.1016/S1872-5805(25)60978-4","url":null,"abstract":"<div><div>In recent years, numerous single-atom catalysts (SACs) have been synthesized to activate persulfate (PS) by a non-radical pathway because of its high selectivity, and activity for the catalyst. Metal-nitrogen-carbon (MN<em>x</em>-C) has been identified as the key active site in SACs. Although methods for preparing SACs have been extensively reported, a systematic summary of the direct construction of M-N<em>x</em>-C, especially unconventional metal-nitrogen-carbon (UM-N<em>x</em>-C, <em>x</em>≠4), on SACs for PS non-radical activation has still not been reported. The role of the M-N<em>x</em>-C active sites on PS non-radical activation is discussed and methods for the formation of M-N<em>x</em>-C and UM-N<em>x</em>-C active sites in SACs and the effect of catalyst carriers such as carbon nitride (g-C3N4), MOFs, COFs, and other carbon materials are reviewed. Direct and indirect methods, especially for UM-N<em>x</em>-C active site formation, are also elaborated. Factors affecting the formation of a M-N<em>x</em>-C active site on SACs are also discussed. Prospects for the use of M-Nx-C active sites for the non-radical activation of PS by SACs to remove organic contaminants from wastewater are evaluated.</div><div><span><figure><span><img><ol><li><span><span>Download: <span>Download high-res image (164KB)</span></span></span></li><li><span><span>Download: <span>Download full-size image</span></span></span></li></ol></span></figure></span></div></div>","PeriodicalId":19719,"journal":{"name":"New Carbon Materials","volume":"40 5","pages":"Pages 993-1014"},"PeriodicalIF":5.7,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145448763","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Structural engineering of a bimetallic iron-cobalt sulfide composite anode for superior sodium-ion battery performance 高钠离子电池性能双金属铁钴硫化复合阳极的结构工程

IF 5.7 3区材料科学 Q2 Materials Science

New Carbon Materials

Pub Date : 2025-10-01 DOI: 10.1016/S1872-5805(25)61001-8

Zheng-guang FU , Nan LI , Xin-yu SHAO , Min HONG , Ju-tao SUN

Transition metal sulfides are considered promising anode materials for sodium-ion batteries (SIBs) due to their high theoretical capacity and low synthesis cost. However, issues such as poor cyclic stability and rate performance, arising from volume expansion and structural degradation, remain significant challenges. We report a novel FeS2/CoS2 heterostructure embedded in a 3D carbon aerogel matrix (FeS2/CoS2@C) synthesized by a cross-linking and vulcanization process. The resulting core-shell structure, with bimetallic FeS2/CoS2 nanoparticles encapsulated in a conductive carbon shell, effectively reduces the adverse effects of volume changes during sodiation/desodiation cycles. The 3D porous carbon network increases both ion and electron diffusion, while preventing agglomeration of the active material and maintaining interface integrity. The FeS2/CoS2@C composite has an outstanding electrochemical performance, including a high specific capacity of 725 mAh g−1 at 0.5 A g−1 and an exceptional rate capability of 572 mAh g−1 at 10 A g−1. It also has remarkable cycling stability with no significant capacity decay over 1000 cycles at 5 A g−1.

Download: Download high-res image (94KB)
Download: Download full-size image

过渡金属硫化物具有理论容量大、合成成本低等优点，被认为是钠离子电池极具发展前景的负极材料。然而，由体积膨胀和结构退化引起的循环稳定性和速率性能差等问题仍然是重大挑战。我们报道了一种新型的FeS2/CoS2异质结构嵌入在三维碳气凝胶基质（FeS2/CoS2@C）中，通过交联和硫化工艺合成。所得到的核壳结构，将双金属FeS2/CoS2纳米颗粒包裹在导电碳壳中，有效地减少了在钠化/脱钠循环过程中体积变化的不利影响。三维多孔碳网络增加了离子和电子的扩散，同时防止了活性材料的团聚，保持了界面的完整性。FeS2/CoS2@C复合材料具有优异的电化学性能，包括在0.5 a g−1时具有725 mAh g−1的高比容量和在10 a g−1时具有572 mAh g−1的特殊倍率容量。它还具有显著的循环稳定性，在5a g−1下，在1000次循环中没有明显的容量衰减。下载：下载高清图片（94KB）下载：下载全尺寸图片

{"title":"Structural engineering of a bimetallic iron-cobalt sulfide composite anode for superior sodium-ion battery performance","authors":"Zheng-guang FU , Nan LI , Xin-yu SHAO , Min HONG , Ju-tao SUN","doi":"10.1016/S1872-5805(25)61001-8","DOIUrl":"10.1016/S1872-5805(25)61001-8","url":null,"abstract":"<div><div>Transition metal sulfides are considered promising anode materials for sodium-ion batteries (SIBs) due to their high theoretical capacity and low synthesis cost. However, issues such as poor cyclic stability and rate performance, arising from volume expansion and structural degradation, remain significant challenges. We report a novel FeS2/CoS2 heterostructure embedded in a 3D carbon aerogel matrix (FeS2/CoS2@C) synthesized by a cross-linking and vulcanization process. The resulting core-shell structure, with bimetallic FeS2/CoS2 nanoparticles encapsulated in a conductive carbon shell, effectively reduces the adverse effects of volume changes during sodiation/desodiation cycles. The 3D porous carbon network increases both ion and electron diffusion, while preventing agglomeration of the active material and maintaining interface integrity. The FeS2/CoS2@C composite has an outstanding electrochemical performance, including a high specific capacity of 725 mAh g−1 at 0.5 A g−1 and an exceptional rate capability of 572 mAh g−1 at 10 A g−1. It also has remarkable cycling stability with no significant capacity decay over 1000 cycles at 5 A g−1.</div><div><span><figure><span><img><ol><li><span><span>Download: <span>Download high-res image (94KB)</span></span></span></li><li><span><span>Download: <span>Download full-size image</span></span></span></li></ol></span></figure></span></div></div>","PeriodicalId":19719,"journal":{"name":"New Carbon Materials","volume":"40 5","pages":"Pages 1113-1121"},"PeriodicalIF":5.7,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145448769","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Tuning surface functional groups and crystallinity in activated carbon for high-voltage lithium-ion capacitors 高压锂离子电容器用活性炭表面官能团和结晶度的调整

IF 5.7 3区材料科学 Q2 Materials Science

New Carbon Materials

Pub Date : 2025-10-01 DOI: 10.1016/S1872-5805(25)61003-1

Ya-bin AN , Yu SUN , Ke-liang ZHANG , Chen LI , Xian-zhong SUN , Kai WANG , Xiong ZHANG , Yan-wei MA

Lithium-ion capacitors (LICs) combine the high power density of electrical double-layer capacitors with the high energy density of lithium-ion batteries. However, they face practical limitations due to the narrow operating voltage window of their activated carbon (AC) cathodes. We report a scalable thermal treatment strategy to develop high-voltage-tolerant AC cathodes. Through controlled thermal treatment of commercial activated carbon (Raw-AC) under a H2/Ar atmosphere at 400–800 °C, the targeted reduction of degradation-prone functional groups can be achieved while preserving the critical pore structure and increasing graphitic microcrystalline ordering. The AC treated at 400 °C (HAC-400) had a significant increase in specific capacity (96.0 vs. 75.1 mAh/g at 0.05 A/g) and better rate capability (61.1 vs. 36.1 mAh/g at 5 A/g) in half-cell LICs, along with an 83.5% capacity retention over 7400 cycles within an extended voltage range of 2.0–4.2 V in full-cell LICs. Scalability was demonstrated by a 120 g batch production, enabling fabrication of pouch-type LICs with commercial hard carbon anodes that delivered a higher energy density of 28.3 Wh/kg at 1 C, and a peak power density of 12.1 kW/kg compared to devices using raw AC. This simple, industry-compatible approach may be used for producing advanced cathode materials for practical high-performance LICs.

Download: Download high-res image (114KB)
Download: Download full-size image

锂离子电容器（lic）结合了电双层电容器的高功率密度和锂离子电池的高能量密度。然而，由于活性炭（AC）阴极的工作电压窗口窄，它们面临着实际的限制。我们报告了一种可扩展的热处理策略，以开发高耐压交流阴极。通过在400 ~ 800℃的H2/Ar气氛下对商品活性炭（Raw-AC）进行热处理，可以在保持临界孔隙结构和提高石墨微晶有序度的同时，实现降解官能团的定向还原。在400°C下处理的AC （AC-400）显著增加了半电池型锂离子电池的比容量（0.05 a /g时为96.0 vs. 75.1 mAh/g）和更好的倍率能力（5a /g时为61.1 vs. 36.1 mAh/g），在2.0-4.2 V的扩展电压范围内，在7400次循环中，全电池型锂离子电池的容量保持率为83.5%。120克批量生产证明了可扩展性，与使用原始交流的设备相比，可以使用商用硬碳阳极制造袋型lic，在1c下提供28.3 Wh/kg的更高能量密度，峰值功率密度为12.1 kW/kg。这种简单，工业兼容的方法可用于生产用于实际高性能lic的高级阴极材料。下载：下载高分辨率图片（114KB）下载：下载全尺寸图片

{"title":"Tuning surface functional groups and crystallinity in activated carbon for high-voltage lithium-ion capacitors","authors":"Ya-bin AN , Yu SUN , Ke-liang ZHANG , Chen LI , Xian-zhong SUN , Kai WANG , Xiong ZHANG , Yan-wei MA","doi":"10.1016/S1872-5805(25)61003-1","DOIUrl":"10.1016/S1872-5805(25)61003-1","url":null,"abstract":"<div><div>Lithium-ion capacitors (LICs) combine the high power density of electrical double-layer capacitors with the high energy density of lithium-ion batteries. However, they face practical limitations due to the narrow operating voltage window of their activated carbon (AC) cathodes. We report a scalable thermal treatment strategy to develop high-voltage-tolerant AC cathodes. Through controlled thermal treatment of commercial activated carbon (Raw-AC) under a H2/Ar atmosphere at 400–800 °C, the targeted reduction of degradation-prone functional groups can be achieved while preserving the critical pore structure and increasing graphitic microcrystalline ordering. The AC treated at 400 °C (HAC-400) had a significant increase in specific capacity (96.0 vs. 75.1 mAh/g at 0.05 A/g) and better rate capability (61.1 vs. 36.1 mAh/g at 5 A/g) in half-cell LICs, along with an 83.5% capacity retention over 7400 cycles within an extended voltage range of 2.0–4.2 V in full-cell LICs. Scalability was demonstrated by a 120 g batch production, enabling fabrication of pouch-type LICs with commercial hard carbon anodes that delivered a higher energy density of 28.3 Wh/kg at 1 C, and a peak power density of 12.1 kW/kg compared to devices using raw AC. This simple, industry-compatible approach may be used for producing advanced cathode materials for practical high-performance LICs.</div><div><span><figure><span><img><ol><li><span><span>Download: <span>Download high-res image (114KB)</span></span></span></li><li><span><span>Download: <span>Download full-size image</span></span></span></li></ol></span></figure></span></div></div>","PeriodicalId":19719,"journal":{"name":"New Carbon Materials","volume":"40 5","pages":"Pages 1085-1097"},"PeriodicalIF":5.7,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145448767","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0