Pub Date : 2025-04-01Epub Date: 2025-04-29DOI: 10.1016/S1872-5805(25)60965-6
Sahoo Sumanta , Kumar Rajesh , Soo Han Sung
The rising concern over electromagnetic (EM) pollution is responsible for the rapid progress in EM interference (EMI) shielding and EM wave absorption in the last few years, and carbon materials with a large surface area and high porosity have been investigated. Compared to other carbon materials, biomass-derived carbon (BC) are considered efficient and eco-friendly materials for this purpose. We summarize the recent advances in BC materials for both EMI shielding and EM wave absorption. After a brief overview of the synthesis strategies of BC materials and a precise outline of EM wave interference, strategies for improving their EMI shielding and EM wave absorption are discussed. Finally, the existing challenges and the future prospects for such materials are briefly summarized.
{"title":"Low-value biomass-derived carbon composites for electromagnetic wave absorption and shielding: A review","authors":"Sahoo Sumanta , Kumar Rajesh , Soo Han Sung","doi":"10.1016/S1872-5805(25)60965-6","DOIUrl":"10.1016/S1872-5805(25)60965-6","url":null,"abstract":"<div><div>The rising concern over electromagnetic (EM) pollution is responsible for the rapid progress in EM interference (EMI) shielding and EM wave absorption in the last few years, and carbon materials with a large surface area and high porosity have been investigated. Compared to other carbon materials, biomass-derived carbon (BC) are considered efficient and eco-friendly materials for this purpose. We summarize the recent advances in BC materials for both EMI shielding and EM wave absorption. After a brief overview of the synthesis strategies of BC materials and a precise outline of EM wave interference, strategies for improving their EMI shielding and EM wave absorption are discussed. Finally, the existing challenges and the future prospects for such materials are briefly summarized.\u0000\t\t\t\t<span><figure><span><img><ol><li><span><span>Download: <span>Download high-res image (141KB)</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 2","pages":"Pages 293-316"},"PeriodicalIF":5.7,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143887622","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}
Pub Date : 2025-04-01Epub Date: 2025-04-29DOI: 10.1016/S1872-5805(25)60958-9
Pano-Azucena Carolina , Rosas-Rangel Roberto , Olvera-Sosa Miguel , Salvador González-González David , Rangel-Mendez Rene , Felipe Chazaro-Ruiz Luis , Avalos-Borja Miguel , Antonio Arcibar-Orozco Javier
The use of carbon from waste biomass has the potential to eliminate the drawbacks of Li-S batteries and improve their overall performance. Chrome-tanned-leathershavings (CTLS) are a readily available waste product that can be transformed into porous carbon. We prepared an activated carbon by microwave pyrolysis combined with KOH activator using the CTLS as starting materials. The carbon had a specific surface area of 556 m2g−1 and a honeycomb-like structure. Two kinds of N-doped activated carbons were then synthesized by thermal decomposition of the activated carbon, either combined with urea, or impregnated with ethanolamine. Both N-doped activated carbons have an increased number of nitrogen and amine surface groups. However, only the urea treatment was effective in improving the initial capacity of the cell (1363 mAh g−1), which is probably linked to the sorption of long-chain polysulfides. This investigation confirms that it is possible to use the thermal decomposition of urea to obtain carbon materials from CTLS for use as the sulfur-host cathode in Li-S batteries and improve their performance. A radial basis function neural network was fitted to provide statistical support for the experimental results, which confirmed the importance of the nitrogen content of the carbons in determining the discharge capacity of the cells.
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利用废弃生物质中的碳有可能消除锂硫电池的缺点，并提高其整体性能。铬鞣皮革屑（CTLS）是一种容易获得的废物，可以转化为多孔碳。以CTLS为原料，采用微波热解结合KOH活化剂制备活性炭。碳的比表面积为556 m2 - 1，具有蜂窝状结构。采用热分解法制备了两种n掺杂活性炭，分别与尿素结合和乙醇胺浸渍。两种n掺杂活性炭表面的氮和胺基团数量都有所增加。然而，只有尿素处理能有效提高电池的初始容量（1363 mAh g−1），这可能与长链多硫化物的吸附有关。该研究证实了利用尿素热分解从CTLS中获得碳材料作为Li-S电池的硫主阴极并提高其性能的可能性。采用径向基函数神经网络对实验结果进行了统计支持，证实了碳的含氮量对电池放电容量的影响。下载：下载高分辨率图片（159KB）下载：下载全尺寸图片
{"title":"N-doped activated carbons from leather waste produced by microwave activation for use as the cathode of Li-S batteries","authors":"Pano-Azucena Carolina , Rosas-Rangel Roberto , Olvera-Sosa Miguel , Salvador González-González David , Rangel-Mendez Rene , Felipe Chazaro-Ruiz Luis , Avalos-Borja Miguel , Antonio Arcibar-Orozco Javier","doi":"10.1016/S1872-5805(25)60958-9","DOIUrl":"10.1016/S1872-5805(25)60958-9","url":null,"abstract":"<div><div>The use of carbon from waste biomass has the potential to eliminate the drawbacks of Li-S batteries and improve their overall performance. Chrome-tanned-leathershavings (CTLS) are a readily available waste product that can be transformed into porous carbon. We prepared an activated carbon by microwave pyrolysis combined with KOH activator using the CTLS as starting materials. The carbon had a specific surface area of 556 m<sup>2</sup>g<sup>−1</sup> and a honeycomb-like structure. Two kinds of N-doped activated carbons were then synthesized by thermal decomposition of the activated carbon, either combined with urea, or impregnated with ethanolamine. Both N-doped activated carbons have an increased number of nitrogen and amine surface groups. However, only the urea treatment was effective in improving the initial capacity of the cell (1363 mAh g<sup>−1</sup>), which is probably linked to the sorption of long-chain polysulfides. This investigation confirms that it is possible to use the thermal decomposition of urea to obtain carbon materials from CTLS for use as the sulfur-host cathode in Li-S batteries and improve their performance. A radial basis function neural network was fitted to provide statistical support for the experimental results, which confirmed the importance of the nitrogen content of the carbons in determining the discharge capacity of the cells.\u0000\t\t\t\t<span><figure><span><img><ol><li><span><span>Download: <span>Download high-res image (159KB)</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 2","pages":"Pages 382-395"},"PeriodicalIF":5.7,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143887576","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}
The rapid development of the information era has led to increased power consumption, which generates more heat. This requires more efficient thermal management systems, with the most direct approach being the development of superior thermal interface materials (TIMs). Mesocarbon microbeads (MCMBs) have several desirable properties for this purpose, including high thermal conductivity and excellent thermal stability. Although their thermal conductivity (K) may not be exceptional among all carbon materials, their ease of production and low cost make them ideal filler materials for developing a new generation of carbon-based TIMs. We report the fabrication of high-performance TIMs by incorporating MCMBs in a polyimide (PI) framework, producing highly graphitized PI/MCMB (PM) foams and anisotropic polydimethylsiloxane/PM (PDMS/PM) composites with a high thermal conductivity using directional freezing and high-temperature thermal annealing. The resulting materials had a high through-plane (TP) K of 15.926 W·m−1·K−1, 4.83 times that of conventional thermally conductive silicone pads and 88.5 times higher than that of pure PDMS. The composites had excellent mechanical properties and thermal stability, meeting the demands of modern electronic products for integration, multi-functionality, and miniaturization.
{"title":"Novel thermal interface materials based on mesocarbon microbeads with a high through-plane thermal conductivity","authors":"Zhi-peng SUN, Cheng MA, Ji-tong WANG, Wen-ming QIAO, Li-cheng LING","doi":"10.1016/S1872-5805(25)60964-4","DOIUrl":"10.1016/S1872-5805(25)60964-4","url":null,"abstract":"<div><div>The rapid development of the information era has led to increased power consumption, which generates more heat. This requires more efficient thermal management systems, with the most direct approach being the development of superior thermal interface materials (TIMs). Mesocarbon microbeads (MCMBs) have several desirable properties for this purpose, including high thermal conductivity and excellent thermal stability. Although their thermal conductivity (<em>K</em>) may not be exceptional among all carbon materials, their ease of production and low cost make them ideal filler materials for developing a new generation of carbon-based TIMs. We report the fabrication of high-performance TIMs by incorporating MCMBs in a polyimide (PI) framework, producing highly graphitized PI/MCMB (PM) foams and anisotropic polydimethylsiloxane/PM (PDMS/PM) composites with a high thermal conductivity using directional freezing and high-temperature thermal annealing. The resulting materials had a high through-plane (TP) <em>K</em> of 15.926 W·m<sup>−1</sup>·K<sup>−1</sup>, 4.83 times that of conventional thermally conductive silicone pads and 88.5 times higher than that of pure PDMS. The composites had excellent mechanical properties and thermal stability, meeting the demands of modern electronic products for integration, multi-functionality, and miniaturization.\u0000\t\t\t\t<span><figure><span><img><ol><li><span><span>Download: <span>Download high-res image (60KB)</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 2","pages":"Pages 422-437"},"PeriodicalIF":5.7,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143887617","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}
Pub Date : 2025-04-01Epub Date: 2025-04-29DOI: 10.1016/S1872-5805(25)60966-8
Baratta Mariafrancesca , Vladimirovich Nezhdanov Aleksey , Valentinovich Ershov Aleksey , Aiello Donatella , Napoli Anna , Di Donna Leonardo , Ivanovic Mashin Alexandr , Pasquale Nicoletta Fiore , De Filpo Giovanni
Buckypapers (BPs) consist of carbon nanotube (CNT) membranes with good mechanical, thermal and electrical properties. We report the modification of CNT buckypapers by the surface deposition of a thin layer of titanium dioxide and their subsequent photocatalytic use for the removal of three wastewater pollutants: diclofenac (DF), carbofuran (CB) and methylene blue (MB). The results show the following decreases (RE) in the initial concentrations of these pollutants, REDF=99.5%, REMB=96% and RECB=90% after 90 min of exposure to UV-Vis radiation using 0.6 mg of photocatalyst. Experiments also showed that the degradation rate of diclofenac (k = 0.1028 min−1) is respectively 3.5 and 6 times faster than the values for CB (k = 0.0298 min−1) and MB (k = 0.0174 min−1), probably due to the easier bond cleavage in DF. UV-Vis irradiated solutions of these pollutants were then analyzed by mass spectrometry to identify the species formed during photocatalysis and suggest possible degradation paths for MB, DF, and CB. Data showed that the degradation of DF involves the formation of a photocyclization product through loss of HCl molecule, clearly consuming less energy than that needed for the opening of the central aromatic ring in MB, or the loss of the N-methyl amide functional group for CB.
{"title":"Improving the catalytic performance of TiO2 by its surface deposition on CNT buckypapers for use in the removal of wastewater pollutants","authors":"Baratta Mariafrancesca , Vladimirovich Nezhdanov Aleksey , Valentinovich Ershov Aleksey , Aiello Donatella , Napoli Anna , Di Donna Leonardo , Ivanovic Mashin Alexandr , Pasquale Nicoletta Fiore , De Filpo Giovanni","doi":"10.1016/S1872-5805(25)60966-8","DOIUrl":"10.1016/S1872-5805(25)60966-8","url":null,"abstract":"<div><div>Buckypapers (BPs) consist of carbon nanotube (CNT) membranes with good mechanical, thermal and electrical properties. We report the modification of CNT buckypapers by the surface deposition of a thin layer of titanium dioxide and their subsequent photocatalytic use for the removal of three wastewater pollutants: diclofenac (DF), carbofuran (CB) and methylene blue (MB). The results show the following decreases (RE) in the initial concentrations of these pollutants, RE<sub>DF</sub>=99.5%, RE<sub>MB</sub>=96% and RE<sub>CB</sub>=90% after 90 min of exposure to UV-Vis radiation using 0.6 mg of photocatalyst. Experiments also showed that the degradation rate of diclofenac (<em>k</em> = 0.1028 min<sup>−1</sup>) is respectively 3.5 and 6 times faster than the values for CB (<em>k</em> = 0.0298 min<sup>−1</sup>) and MB (<em>k</em> = 0.0174 min<sup>−1</sup>), probably due to the easier bond cleavage in DF. UV-Vis irradiated solutions of these pollutants were then analyzed by mass spectrometry to identify the species formed during photocatalysis and suggest possible degradation paths for MB, DF, and CB. Data showed that the degradation of DF involves the formation of a photocyclization product through loss of HCl molecule, clearly consuming less energy than that needed for the opening of the central aromatic ring in MB, or the loss of the N-methyl amide functional group for CB.\u0000\t\t\t\t<span><figure><span><img><ol><li><span><span>Download: <span>Download high-res image (97KB)</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 2","pages":"Pages 438-455"},"PeriodicalIF":5.7,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143887619","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}
Pub Date : 2025-04-01Epub Date: 2025-04-29DOI: 10.1016/S1872-5805(25)60963-2
Qian SUN , Ya-feng FAN , Li-jing XIE , Zhen-bing WANG , Xian-hong HUANG , Fang-yuan SU , Cheng-meng CHEN
Filter capacitors play an important role in alternating current (AC)-line filtering for stabilizing voltage, suppressing harmonics, and improving power quality. However, traditional aluminum electrolytic capacitors (AECs) suffer from a large size, short lifespan, low power density, and poor reliability, which limits their use. In contrast, ultrafast supercapacitors (SCs) are ideal for replacing commercial AECs because of their extremely high power densities, fast charging and discharging, and excellent high-frequency response. We review the design principles and key parameters for ultrafast supercapacitors and summarize research progress in recent years from the aspects of electrode materials, electrolytes, and device configurations. The preparation, structures, and frequency response performance of electrode materials mainly consisting of carbon materials such as graphene and carbon nanotubes, conductive polymers, and transition metal compounds, are focused on. Finally, future research directions for ultrafast SCs are suggested.
{"title":"A review of ultrafast supercapacitors for AC-line filtering","authors":"Qian SUN , Ya-feng FAN , Li-jing XIE , Zhen-bing WANG , Xian-hong HUANG , Fang-yuan SU , Cheng-meng CHEN","doi":"10.1016/S1872-5805(25)60963-2","DOIUrl":"10.1016/S1872-5805(25)60963-2","url":null,"abstract":"<div><div>Filter capacitors play an important role in alternating current (AC)-line filtering for stabilizing voltage, suppressing harmonics, and improving power quality. However, traditional aluminum electrolytic capacitors (AECs) suffer from a large size, short lifespan, low power density, and poor reliability, which limits their use. In contrast, ultrafast supercapacitors (SCs) are ideal for replacing commercial AECs because of their extremely high power densities, fast charging and discharging, and excellent high-frequency response. We review the design principles and key parameters for ultrafast supercapacitors and summarize research progress in recent years from the aspects of electrode materials, electrolytes, and device configurations. The preparation, structures, and frequency response performance of electrode materials mainly consisting of carbon materials such as graphene and carbon nanotubes, conductive polymers, and transition metal compounds, are focused on. Finally, future research directions for ultrafast SCs are suggested.\u0000\t\t\t\t<span><figure><span><img><ol><li><span><span>Download: <span>Download high-res image (153KB)</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 2","pages":"Pages 243-269"},"PeriodicalIF":5.7,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143887620","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}
Pub Date : 2025-04-01Epub Date: 2025-04-29DOI: 10.1016/S1872-5805(25)60959-0
Ren-tian CHEN , Yu-xin ZHU , Rui LUO , Xiao-nuo JIANG , Hong-xiang SI , Xiang-yun QIU , Qian WANG , Tao WEI
Metal-organic frameworks (MOFs) are important as possible energy storage materials. Nitrogen-doped iron-cobalt MOFs were synthesized by a one-pot solvothermal method using CoCl3·6H2O and FeCl3·6H2O dissolved in N, N-dimethylformamide, and were converted into Fe-Co embedded in N-doped porous carbon polyhedra by pyrolysis in a nitrogen atmosphere. During pyrolysis, the organic ligands transformed into N-doped porous carbon which improved their structural stability and also their electrical contact with other materials. The Fe and Co are tightly bound together because of their encapsulation by the carbon nitride and are well dispersed in the carbon matrix, and improve the material's conductivity and stability and provide additional capacity. When used as the anode for lithium-ion batteries, the material gives an initial capacity of up to 2230.7 mAh g−1 and a reversible capacity of 1146.3 mAh g−1 is retained after 500 cycles at a current density of 0.5 A g−1, making it an excellent candidate for this purpose.
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金属有机骨架（MOFs）是一种重要的储能材料。以CoCl3·6H2O和FeCl3·6H2O溶解于N， N-二甲基甲酰胺中，采用一锅溶剂热法合成了氮掺杂铁钴MOFs，并在氮气气氛中热解转化为Fe-Co包埋在N掺杂多孔碳多面体中。在热解过程中，有机配体转变为掺n的多孔碳，提高了其结构稳定性和与其他材料的电接触性。由于被氮化碳包裹，铁和钴紧密结合在一起，并很好地分散在碳基体中，从而提高了材料的导电性和稳定性，并提供了额外的容量。当用作锂离子电池的阳极时，该材料的初始容量高达2230.7 mAh g - 1，在0.5 a g - 1的电流密度下，500次循环后仍保持1146.3 mAh g - 1的可逆容量，使其成为这一目的的优秀候选人。下载：下载高分辨率图片（121KB）下载：下载全尺寸图片
{"title":"A N-doped carbon with encapsulated Fe and Co particles derived from a metal organic framework for use as the anode in lithium-ion batteries","authors":"Ren-tian CHEN , Yu-xin ZHU , Rui LUO , Xiao-nuo JIANG , Hong-xiang SI , Xiang-yun QIU , Qian WANG , Tao WEI","doi":"10.1016/S1872-5805(25)60959-0","DOIUrl":"10.1016/S1872-5805(25)60959-0","url":null,"abstract":"<div><div>Metal-organic frameworks (MOFs) are important as possible energy storage materials. Nitrogen-doped iron-cobalt MOFs were synthesized by a one-pot solvothermal method using CoCl<sub>3</sub>·6H<sub>2</sub>O and FeCl<sub>3</sub>·6H<sub>2</sub>O dissolved in N, N-dimethylformamide, and were converted into Fe-Co embedded in N-doped porous carbon polyhedra by pyrolysis in a nitrogen atmosphere. During pyrolysis, the organic ligands transformed into N-doped porous carbon which improved their structural stability and also their electrical contact with other materials. The Fe and Co are tightly bound together because of their encapsulation by the carbon nitride and are well dispersed in the carbon matrix, and improve the material's conductivity and stability and provide additional capacity. When used as the anode for lithium-ion batteries, the material gives an initial capacity of up to 2230.7 mAh g<sup>−1</sup> and a reversible capacity of 1146.3 mAh g<sup>−1</sup> is retained after 500 cycles at a current density of 0.5 A g<sup>−1</sup>, making it an excellent candidate for this purpose.\u0000\t\t\t\t<span><figure><span><img><ol><li><span><span>Download: <span>Download high-res image (121KB)</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 2","pages":"Pages 355-365"},"PeriodicalIF":5.7,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143887574","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}
Pub Date : 2025-04-01Epub Date: 2025-04-29DOI: 10.1016/S1872-5805(25)60954-1
Shuo LIU , Wei ZHOU , Xue-dan SONG , Chang YU , Jie-shan QIU
Hard carbons, with a high sodium storage capacity, low voltage plateau, and excellent cycling stability, have emerged as one of the most promising anode materials for sodium-ion batteries. Because their pore structure has a significant impact on their sodium storage performance, its control is key for improving the battery performance. We used β-cyclodextrin as the carbon source to prepare various hard carbon materials with different micropore structures using a sodium chloride-assisted hydrothermal carbonization strategy, and studied their performance as a function of the sodium chloride concentration. Characterization using XRD, Raman spectroscopy, and high-resolution TEM indicated that changing the sodium chloride concentration changed the pore structure and the closed pore volume. Given the sodium chloride concentration was 2 mol L−1, the hard carbon material (CD-2) had the highest degree of disorder and the largest graphite microcrystals, as well as the largest closed pore volume together with a gradient pore structure. Electrochemical tests indicate that CD-2 had a high specific capacity of 360 mAh g−1 and an initial Coulombic efficiency of 90.2% at 0.02 A g−1. This simple carbonization technique provides an effective way for controlling the closed pore structure in hard carbon materials, thus improving the battery performance.
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硬碳具有高钠存储容量、低电压平台和良好的循环稳定性，是钠离子电池最有前途的负极材料之一。由于它们的孔隙结构对其储钠性能有重要影响，因此对孔隙结构的控制是提高电池性能的关键。以β-环糊精为碳源，采用氯化钠辅助水热碳化策略制备了不同微孔结构的硬碳材料，并研究了其性能与氯化钠浓度的关系。通过XRD、拉曼光谱和高分辨率TEM表征表明，改变氯化钠浓度会改变孔隙结构和闭孔体积。当氯化钠浓度为2 mol L−1时，硬碳材料CD-2的无序程度最高，石墨微晶最大，闭孔体积最大，孔隙结构呈梯度状。电化学测试表明，CD-2在0.02 a g−1时具有360 mAh g−1的高比容量和90.2%的初始库仑效率。这种简单的碳化技术为控制硬碳材料的闭孔结构，从而提高电池性能提供了有效途径。下载：下载高清图片（76KB）下载：下载全尺寸图片
{"title":"Hard carbons prepared by a salt-assisted hydrothermal method as anodes for the sodium-ion battery","authors":"Shuo LIU , Wei ZHOU , Xue-dan SONG , Chang YU , Jie-shan QIU","doi":"10.1016/S1872-5805(25)60954-1","DOIUrl":"10.1016/S1872-5805(25)60954-1","url":null,"abstract":"<div><div>Hard carbons, with a high sodium storage capacity, low voltage plateau, and excellent cycling stability, have emerged as one of the most promising anode materials for sodium-ion batteries. Because their pore structure has a significant impact on their sodium storage performance, its control is key for improving the battery performance. We used β-cyclodextrin as the carbon source to prepare various hard carbon materials with different micropore structures using a sodium chloride-assisted hydrothermal carbonization strategy, and studied their performance as a function of the sodium chloride concentration. Characterization using XRD, Raman spectroscopy, and high-resolution TEM indicated that changing the sodium chloride concentration changed the pore structure and the closed pore volume. Given the sodium chloride concentration was 2 mol L<sub>−1</sub>, the hard carbon material (CD-2) had the highest degree of disorder and the largest graphite microcrystals, as well as the largest closed pore volume together with a gradient pore structure. Electrochemical tests indicate that CD-2 had a high specific capacity of 360 mAh g<sub>−1</sub> and an initial Coulombic efficiency of 90.2% at 0.02 A g<sub>−1</sub>. This simple carbonization technique provides an effective way for controlling the closed pore structure in hard carbon materials, thus improving the battery performance.\u0000\t\t\t\t<span><figure><span><img><ol><li><span><span>Download: <span>Download high-res image (76KB)</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 2","pages":"Pages 346-354"},"PeriodicalIF":5.7,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143887573","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}
Pub Date : 2025-04-01Epub Date: 2025-04-29DOI: 10.1016/S1872-5805(25)60957-7
Xiu-zhen LV , Xiang-xiang XU , Meng-meng YU , Yi-chen WEI , Jun-ying WANG , Jun-zhong WANG
The need for bi-functional catalysts that facilitate both the oxygen reduction (ORR) and carbon dioxide reduction (CO2RR) reactions arises from their potential to help solve the critical problems of carbon neutrality and renewable energy conversion. However, there are few reports on the development of bi-functional catalysts for zinc-air battery-driven CO2RR devices. We introduce a novel approach for synthesizing Fe2N/Fe3C species embedded in nitrogen-doped carbon nanofibers by electrospinning a solution of Hemin and polyacrylonitrile in N,N-dimethylformamide. The material has an exceptional catalytic performance, with a half-wave potential of 0.91 V versus RHE for the ORR and values of over 90% for both the selectivity and Faradaic efficiency for the CO2RR. The high catalytic performances are attributed to the strong coupling between the Fe3C/Fe2N heterostructure and the Fe-N-C sites in the nitrogen-doped carbon nanofibers. Notably, both Fe3C and Fe2N play distinct roles in both the ORR and CO2RR. This investigation indicates a way for designing advanced carbon-based bi-functional catalysts for use in this field.
{"title":"The synthesis of electrospun N-doped carbon nanofibers with embedded Fe2N/Fe3C species for catalyzing the O2 and CO2 reduction reactions","authors":"Xiu-zhen LV , Xiang-xiang XU , Meng-meng YU , Yi-chen WEI , Jun-ying WANG , Jun-zhong WANG","doi":"10.1016/S1872-5805(25)60957-7","DOIUrl":"10.1016/S1872-5805(25)60957-7","url":null,"abstract":"<div><div>The need for bi-functional catalysts that facilitate both the oxygen reduction (ORR) and carbon dioxide reduction (CO<sub>2</sub>RR) reactions arises from their potential to help solve the critical problems of carbon neutrality and renewable energy conversion. However, there are few reports on the development of bi-functional catalysts for zinc-air battery-driven CO<sub>2</sub>RR devices. We introduce a novel approach for synthesizing Fe<sub>2</sub>N/Fe<sub>3</sub>C species embedded in nitrogen-doped carbon nanofibers by electrospinning a solution of Hemin and polyacrylonitrile in N,N-dimethylformamide. The material has an exceptional catalytic performance, with a half-wave potential of 0.91 V versus RHE for the ORR and values of over 90% for both the selectivity and Faradaic efficiency for the CO<sub>2</sub>RR. The high catalytic performances are attributed to the strong coupling between the Fe<sub>3</sub>C/Fe<sub>2</sub>N heterostructure and the Fe-N-C sites in the nitrogen-doped carbon nanofibers. Notably, both Fe<sub>3</sub>C and Fe<sub>2</sub>N play distinct roles in both the ORR and CO<sub>2</sub>RR. This investigation indicates a way for designing advanced carbon-based bi-functional catalysts for use in this field.\u0000\t\t\t\t<span><figure><span><img><ol><li><span><span>Download: <span>Download high-res image (61KB)</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 2","pages":"Pages 333-344"},"PeriodicalIF":5.7,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143887623","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}
Pub Date : 2025-02-01Epub Date: 2025-03-13DOI: 10.1016/S1872-5805(25)60955-3
Ding-chen ZHA , Jia-heng WANG , Rui-xiang Hao , Yun-feng Wu , Xiu-he LI , Jia-wen ZHAO , Wen LI , Wen-xiang PIAO , Nan-zhe JIANG
With the development of electronics and portable devices, there is a significant drive to develop electrode materials for supercapacitors that are lightweight, economical, and provide high energy and power densities. Lignin-based porous carbons have recently been extensively studied for energy storage applications because of their characteristics of large specific surface area, easy doping, and high conductivity. Significant progress in the synthesis of porous carbons derived from lignin, using different strategies for their preparation and modification with heteroatoms, metal oxides, metal sulfides, and conductive polymers is considered and their electrochemical performances and ion storage mechanisms are discussed. Considerable focus is directed towards the challenges encountered in using lignin-based porous carbons and the ways to optimize specific capacity and energy density for supercapacitor applications. Finally, the limitations of existing technologies and research directions for improving the performance of lignin-based carbons are discussed.
{"title":"Recent progress on the use of lignin-based porous carbon in supercapacitors","authors":"Ding-chen ZHA , Jia-heng WANG , Rui-xiang Hao , Yun-feng Wu , Xiu-he LI , Jia-wen ZHAO , Wen LI , Wen-xiang PIAO , Nan-zhe JIANG","doi":"10.1016/S1872-5805(25)60955-3","DOIUrl":"10.1016/S1872-5805(25)60955-3","url":null,"abstract":"<div><div>With the development of electronics and portable devices, there is a significant drive to develop electrode materials for supercapacitors that are lightweight, economical, and provide high energy and power densities. Lignin-based porous carbons have recently been extensively studied for energy storage applications because of their characteristics of large specific surface area, easy doping, and high conductivity. Significant progress in the synthesis of porous carbons derived from lignin, using different strategies for their preparation and modification with heteroatoms, metal oxides, metal sulfides, and conductive polymers is considered and their electrochemical performances and ion storage mechanisms are discussed. Considerable focus is directed towards the challenges encountered in using lignin-based porous carbons and the ways to optimize specific capacity and energy density for supercapacitor applications. Finally, the limitations of existing technologies and research directions for improving the performance of lignin-based carbons are discussed.</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 1","pages":"Pages 50-80"},"PeriodicalIF":5.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143610521","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-01Epub Date: 2025-03-13DOI: 10.1016/S1872-5805(25)60946-2
Qian HE , Yan-li YANG , Rui-jiao LI, Dan MA, Li-yun ZHANG
Carbon dots (CDs) are fluorescent carbon-based nanomaterials with sizes smaller than 10 nm, that are renowned for their exceptional properties, including superior antiphotobleaching, excellent biocompatibility, and minimal toxicity, which have received significant interest. Near-infrared (NIR) light has emerged as an ideal light source in the biological field due to its advantages of minimal scattering and absorption, long wavelength emission, increased tissue penetration, and reduced interference from biological backgrounds. CDs with efficient absorption and/or emission characteristics in the NIR spectrum have shown remarkable promise in the biomedical uses. This study provides a comprehensive overview of the preparation methods and wavelength modulation strategies for near-infrared CDs and reviews research progress in their use in the areas of biosensing, bioimaging, and therapy. It also discusses current challenges and clinical prospects, aimed at deepening our understanding of the subject and promoting further advances in this field.
{"title":"Near-infrared carbon dots: pioneering emerging frontiers in biomedical applications","authors":"Qian HE , Yan-li YANG , Rui-jiao LI, Dan MA, Li-yun ZHANG","doi":"10.1016/S1872-5805(25)60946-2","DOIUrl":"10.1016/S1872-5805(25)60946-2","url":null,"abstract":"<div><div>Carbon dots (CDs) are fluorescent carbon-based nanomaterials with sizes smaller than 10 nm, that are renowned for their exceptional properties, including superior antiphotobleaching, excellent biocompatibility, and minimal toxicity, which have received significant interest. Near-infrared (NIR) light has emerged as an ideal light source in the biological field due to its advantages of minimal scattering and absorption, long wavelength emission, increased tissue penetration, and reduced interference from biological backgrounds. CDs with efficient absorption and/or emission characteristics in the NIR spectrum have shown remarkable promise in the biomedical uses. This study provides a comprehensive overview of the preparation methods and wavelength modulation strategies for near-infrared CDs and reviews research progress in their use in the areas of biosensing, bioimaging, and therapy. It also discusses current challenges and clinical prospects, aimed at deepening our understanding of the subject and promoting further advances in this field.</div><div><span><figure><span><img><ol><li><span><span>Download: <span>Download high-res image (53KB)</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 1","pages":"Pages 131-153"},"PeriodicalIF":5.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143610524","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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