FlatChem最新文献_第9页

Tailored nanoarchitectonics of PPy/g-C3N4/MnO2 hybrid on NiCo LDH for enhanced energy storage in supercapacitors 在NiCo LDH上定制PPy/g-C3N4/MnO2杂化材料的纳米结构，用于增强超级电容器的能量存储

IF 5.9 3区材料科学 Q2 CHEMISTRY, PHYSICAL

FlatChem

Pub Date : 2025-06-10 DOI: 10.1016/j.flatc.2025.100897

Hariprasath Rangaraju , Priyadharshini Matheswaran , Pin-Yi Chen , Nirmal Kumar Sakthivel , Krishnamoorthy Shanmugaraj , Pazhanivel Thangavelu , Mani Govindasamy

The growing demand for efficient energy storage devices holding high specific energy has accelerated the search for advanced electrode materials. Transition metal-based layered double hydroxides (LDHs), particularly those containing nickel (Ni) and cobalt (Co), have emerged as promising candidates due to their tunable layered structure and chemical composition. In this study, LDH and its hybrids were prepared using a simple hydrothermal technique. In addition, X-ray diffraction (XRD) measurements approve the presence of H₂O molecules and carbonate anions in the interlamellar space due to their extended interlayer spacing. The quaternary NiCo LDH/manganese dioxide (MnO₂)/polypyrrole (PPy)/graphitic carbon nitride (g-C₃N₄) hybrid nanocomposite exhibits a specific capacitance of 2389 F/g at 1 A/g, with 88 % retention after 5000 cycles at a higher current density of 10 A/g. The superior electrochemical performance is accredited to reduced aggregation and enhanced electronic conductivity. Charge storage kinetics were analysed using Dunn's method and power law, reveals increased diffusive contribution in the quaternary nanocomposite. A hybrid supercapacitor device was fabricated using quaternary hybrid as cathode and activated carbon (AC) as anode delivers a high specific capacitance of 260 F/g at 1 A/g, with 95 % cyclic stability after 10,000 cycles. The assembled device achieves a specific energy of 82 Wh/kg at a specific power of 750 W/kg and a coulombic efficiency of 99 %, demonstrating excellent potential for energy storage applications.

对高比能高效储能装置的需求不断增长，加速了对先进电极材料的探索。过渡金属基层状双氢氧化物（LDHs），特别是那些含有镍（Ni）和钴（Co）的，由于其可调节的层状结构和化学成分，已成为有希望的候选者。本研究采用简单的水热法制备了LDH及其杂化物。此外，x射线衍射（XRD）测量证实，由于层间间距扩大，层间空间中存在H2O分子和碳酸盐阴离子。四元NiCo LDH/二氧化锰（MnO₂）/聚吡啶(PPy)/石墨氮化碳（g- c₃N₄）杂化纳米复合材料在1 a /g电流下的比电容为2389 F/g，在10 a /g高电流密度下循环5000次后保持率为88%。优异的电化学性能被认为是减少聚集和提高电子导电性。利用Dunn方法和幂律分析了电荷存储动力学，揭示了四元纳米复合材料的扩散贡献增加。以四元杂化材料为阴极，活性炭（AC）为阳极，制备了一种混合超级电容器器件，在1 A/g下具有260 F/g的高比电容，在10,000次循环后具有95%的循环稳定性。该装置在750 W/kg的比功率下实现82 Wh/kg的比能量，库仑效率达到99%，显示出储能应用的良好潜力。

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引用次数: 0

Enhancement of electrochemical properties of NiAl-LDH@NiCoSe2 nanocomposite for asymmetric supercapacitor application 增强NiAl-LDH@NiCoSe2纳米复合材料在不对称超级电容器中的电化学性能

IF 5.9 3区材料科学 Q2 CHEMISTRY, PHYSICAL

FlatChem

Pub Date : 2025-06-06 DOI: 10.1016/j.flatc.2025.100894

Huda Fazal , Iftikhar Hussain Gul , Marghoob Ahmed , Rajab Hussain , Ghulam Ali

Innovative energy storage solutions such as supercapacitors (SCs) have been developed to meet the increasing energy demands of the modern world. Hybrid metal chalcogenides have drawn significant interest as electrode active materials for supercapacitors, owing to their layered structure, substantial redox chemistry, fast ion diffusion properties, and versatile morphology. In this study, the NiCoSe₂ nanoparticles hybrid nanocomposites were synthesized with variations of NiAl-LDH nanosheets using the hydrothermal method. NAL@NCS hybrid nanocomposite grown on a Ni-foam exhibited a high specific capacitance of 1092 F g⁻¹ at the current density of 0.5 A g⁻¹. In addition, the NAL@NCS was used as a positive electrode with activated carbon (AC) as a negative electrode to assemble the asymmetric supercapacitor device. Due to the synergetic effect, the NAL@NCS||AC device exhibited a specific capacitance of 674 F g⁻¹ at the current density of 1 A g⁻¹, had an energy density of 304 W h Kg⁻¹ at the power density of 3.42 kW Kg⁻¹ and exceptional stability of 82 % retention after 10,000 cycles at a current density of 30 A g⁻¹. This was mainly due to increased electrochemical surface area and sufficient electron transfer rate in NAL@NCS nanocomposite. This study indicates that the prepared NAL@NCS hybrid nanocomposite is a promising candidate for the supercapacitor practical application.

为了满足现代世界日益增长的能源需求，已经开发出诸如超级电容器（SCs）之类的创新储能解决方案。杂化金属硫族化合物由于其层状结构、丰富的氧化还原化学性质、快速离子扩散特性和多样的形态，作为超级电容器的电极活性材料引起了人们的极大兴趣。在本研究中，采用水热法合成了NiCoSe2纳米颗粒杂化纳米复合材料。NAL@NCS在泡沫镍上生长的杂化纳米复合材料在0.5 a g−1电流密度下具有1092 F g−1的高比电容。此外，以NAL@NCS为正极，活性炭（AC）为负极，组装了不对称超级电容器器件。由于协同效应，NAL@NCS||交流器件在电流密度为1 a g−1时的比电容为674 F g−1，在功率密度为3.42 kW Kg−1时的能量密度为304 W h Kg−1，在电流密度为30 a g−1的情况下，在10,000次循环后保持82%的优异稳定性。这主要是由于NAL@NCS纳米复合材料增加了电化学表面积和足够的电子传递速率。研究表明，制备的NAL@NCS杂化纳米复合材料在超级电容器的实际应用中具有良好的前景。

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引用次数: 0

Ionic liquid-aided liquid phase exfoliation of graphene and improved electric and electromagnetic properties of PLA/EVA/graphene composites 离子液体辅助石墨烯液相剥离及改善PLA/EVA/石墨烯复合材料的电、电磁性能

IF 5.9 3区材料科学 Q2 CHEMISTRY, PHYSICAL

FlatChem

Pub Date : 2025-06-05 DOI: 10.1016/j.flatc.2025.100893

Alessandra de A.P. Gabino , Bluma G. Soares , Elaine F. da Silva

The dispersion of carbonaceous fillers in polymeric matrices presents a significant challenge due to the difference in surface energy between fillers and the polymers. In this study, a straightforward and cost-effective method was employed to exfoliate graphene nanoplatelets (GNP) in water using the liquid phase exfoliation (LPE) technique, with ionic liquids (ILs) serving as surfactants. The treated graphene was subsequently incorporated into PLA/EVA (60:40 wt%) composites, which were evaluated for their rheological and alternating current (AC) electrical properties, as well as their electromagnetic absorptivity in the X and Ku Band (8.2 to 18 GHz). Raman spectroscopy confirmed modifications in the GNP structure, indicating successful exfoliation. Fourier-transform infrared (FTIR) spectroscopy and thermogravimetric analysis (TGA) revealed that a portion of IL adhered to the GNP particles and was thus incorporated into the polymeric composites. The synthesized imidazole sultone-based IL promoted more intense exfoliation and particle fragmentation, leading to a reduction of electrical conductivity and electromagnetic absorptivity of the composite. In contrast, commercial IL, bmim.BF₄, not only enhanced GNP dispersion but also influenced the morphology of the PLA/EVA composite, improving the continuity of EVA phase. This modification significantly lowered the composite's electrical percolation threshold and endowed the material with outstanding electromagnetic absorptivity properties, achieving a reflection loss (RL) below −30 dB and an effective absorption bandwidth (EAB) of 3.67 GHz, covering nearly the entire Ku-band frequency range, with only 5.0 wt% of treated GNP. This study provides novel insights into GNP exfoliation techniques utilizing environmentally friendly solvent and surfactants, and the fabrication of partially biodegradable polymeric composites for electromagnetic absorption applications, such as packaging in electronic devices.

由于填料和聚合物之间表面能的差异，碳质填料在聚合物基体中的分散提出了一个重大的挑战。在这项研究中，采用了一种简单而经济的方法，使用液相剥离（LPE）技术，以离子液体（ILs）作为表面活性剂，在水中剥离石墨烯纳米片（GNP）。随后，将处理过的石墨烯掺入PLA/EVA （60:40 wt%）复合材料中，评估其流变学和交流（AC）电性能，以及X和Ku波段（8.2至18 GHz）的电磁吸收率。拉曼光谱证实了GNP结构的改变，表明剥离成功。傅里叶变换红外光谱（FTIR）和热重分析（TGA）表明，一部分IL粘附在GNP颗粒上，从而被纳入聚合物复合材料中。合成的咪唑磺胺基IL促进了更强烈的剥落和颗粒破碎，导致复合材料的电导率和电磁吸收率降低。相比之下，商业IL， bmim。BF4不仅增强了GNP的分散性，而且影响了PLA/EVA复合材料的形貌，提高了EVA相的连续性。这种改性显著降低了复合材料的电渗透阈值，并赋予材料出色的电磁吸收性能，实现了反射损耗（RL）低于- 30 dB，有效吸收带宽（EAB）为3.67 GHz，覆盖了几乎整个ku波段频率范围，仅占处理GNP的5.0 wt%。这项研究为利用环境友好型溶剂和表面活性剂的GNP剥离技术提供了新的见解，并为电磁吸收应用（如电子设备包装）制造了部分可生物降解的聚合物复合材料。

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引用次数: 0

Effective photostability improvements of rhodamine 6G film via antioxidant addition 通过添加抗氧化剂有效改善罗丹明6G薄膜的光稳定性

IF 5.9 3区材料科学 Q2 CHEMISTRY, PHYSICAL

FlatChem

Pub Date : 2025-05-29 DOI: 10.1016/j.flatc.2025.100892

Hanyu Liu , Mingcai Xie , Jinling Ma , Zhihong Wei , Daocheng Hong , Yuxi Tian

Photostability is a crucial parameter of fluorescent dyes for their applications as probes, sensors, and labels. However, most dyes face a significant challenge of photobleaching under continuous light excitation in the format of film. In this study, we discovered that the photostability of Rhodamine 6G films can be significantly enhanced by the addition of ascorbic acid (AA). Such improvement of photostability by AA is also proved to be effective at single molecule level. We attributed the photostability improvement to the efficient elimination of the triplet state and free radicals of Rh-6G by AA via electron transfer, allowing for rapid recovery to the fluorescent state, and reduce the probability to react with oxygen. This finding not only offers an effective strategy for improving the photostability of fluorescent dyes with potential applications in molecular devices, but also enhances our understanding of the underlying photophysical and photochemical mechanisms.

光稳定性是荧光染料用作探针、传感器和标签的关键参数。然而，大多数染料都面临着在连续光激发下以胶片形式进行光漂白的重大挑战。在本研究中，我们发现加入抗坏血酸（AA）可以显著增强罗丹明6G薄膜的光稳定性。AA对光稳定性的改善在单分子水平上也被证明是有效的。我们将光稳定性的提高归因于AA通过电子转移有效地消除了Rh-6G的三重态和自由基，使其能够快速恢复到荧光状态，并降低了与氧反应的概率。这一发现不仅为提高荧光染料在分子器件中的光稳定性提供了有效的策略，而且增强了我们对潜在的光物理和光化学机制的理解。

引用次数: 0

Ultra-large memory window for non-volatile memory based on ReS2/hBN/Multilayer Graphene heterojunction 基于ReS2/hBN/多层石墨烯异质结的非易失性存储器超大存储窗口

IF 5.9 3区材料科学 Q2 CHEMISTRY, PHYSICAL

FlatChem

Pub Date : 2025-05-27 DOI: 10.1016/j.flatc.2025.100886

Jiawang You , Wenxiang Wang , Xiaohuan Li , Yushi Xu , Jinjin He , Han Mao , Zheng Wei , Lianfeng Sun , Xiaoqing Chen , Yong Jun Li , Zheng Liu , Hang Wei , Mei Xue

With the rapid advancement of technology and the exponential growth of big data, the demand for high-performance memory devices intensifies. Non-volatile memories based on van der Waals materials garner significant attention due to their superior data retention and long-term storage capabilities. However, current floating-gate (FG) memories typically exhibit a memory window of less than 60 %, which limits data storage stability and device lifespan. Therefore, developing non-volatile FG memories with larger memory windows is crucial for modern digital technologies. In this work, we fabricate a non-volatile FG memory device based on a rhenium disulfide (ReS₂)/hexagonal boron nitride (hBN)/multilayer graphene (MLG) heterostructure, ReS₂ serves as the channel material, hBN acts as the tunneling dielectric, and multilayer graphene functions as the floating gate. Due to the high carrier mobility of ReS₂ and the excellent charge storage and release capabilities of graphene, the device demonstrates a high on/off ratio (10⁶) and outstanding long-term data retention (>1000 s). It also exhibits low programming current and the potential for multi-level storage applications. Most notably, the device achieves a significant memory window of 85.5 %, enabling enhanced charge storage capacity and improved stability. This performance is attributed to the effective charge injection and retention enabled by Fowler–Nordheim tunneling through the hBN tunneling barrier These exceptional properties support the realization of efficient and stable data storage, which paves the way for developing next-generation memory technologies.

随着科技的飞速发展和大数据的指数级增长，对高性能存储设备的需求日益增加。基于范德华材料的非易失性存储器因其优越的数据保留和长期存储能力而备受关注。然而，当前的浮动门（FG）存储器通常表现出小于60%的内存窗口，这限制了数据存储的稳定性和设备的使用寿命。因此，开发具有更大存储窗口的非易失性FG存储器对于现代数字技术至关重要。在这项工作中，我们制作了一种基于二硫化铼(ReS2)/六方氮化硼(hBN)/多层石墨烯（MLG）异质结构的非易失性FG存储器件，ReS2作为通道材料，hBN作为隧道介质，多层石墨烯作为浮栅。由于ReS2的高载流子迁移率和石墨烯优异的电荷存储和释放能力，该器件具有高开/关比（106）和出色的长期数据保留（>1000 s）。它还具有低编程电流和多层次存储应用的潜力。最值得注意的是，该设备实现了85.5%的显著内存窗口，从而增强了电荷存储容量并提高了稳定性。这种性能归功于Fowler-Nordheim通过hBN隧道势垒实现的有效电荷注入和保持。这些卓越的特性支持实现高效稳定的数据存储，为开发下一代存储技术铺平了道路。

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引用次数: 0

Novel 2D/3D BiOBr/TiO2 S-scheme heterostructures photocatalyst fabrication for remarkable ciprofloxacin degradation under solar light 新型2D/3D BiOBr/TiO2 S-scheme异质结构光催化剂的制备，在太阳光下显著降解环丙沙星

IF 5.9 3区材料科学 Q2 CHEMISTRY, PHYSICAL

FlatChem

Pub Date : 2025-05-26 DOI: 10.1016/j.flatc.2025.100891

Mohd. Shkir, Atif Mossad Ali

The creation of sophisticated S-scheme heterojunction photocatalysts presents a pioneering approach to enhance pollutant degradation through improved charge separation and light absorption. This study introduces a novel 2D/3D BiOBr/TiO₂ S-scheme heterojunction photocatalyst designed to elevate the degradation efficiency of ciprofloxacin (CIP), an antibiotic contaminant, when exposed to natural sunlight. Characterization of the structure and morphology confirmed the successful integration of BiOBr nanosheets onto TiO₂ nanoparticles, resulting in an optimized heterostructure. Both TiO₂ and the BiOBr-modified TiO₂ (BiOBr/TiO₂) were synthesized using a facile hydrothermal method followed by a slow evaporation process. The BiOBr/TiO₂ composite exhibited significantly enhanced visible-light absorption compared to pure TiO₂, attributed to the light-absorbing properties of BiOBr and the effective formation of the S-scheme heterojunction. This configuration facilitated efficient charge separation, as demonstrated by photoluminescence (PL) quenching and decreased charge-transfer resistance observed in electrochemical impedance spectroscopy (EIS) analyses. The S-scheme mechanism enabled selective recombination of low-energy charge carriers while retaining high-energy electrons and holes, thus maximizing redox potential. Under sunlight irradiation, the BiOBr/TiO₂ composite achieved an impressive 93 % photocatalytic degradation of CIP, significantly outperforming both standalone TiO₂ and BiOBr. Trapping experiments highlighted the crucial roles of hydroxyl radicals (•OH⁻) and superoxide radicals (•O₂⁻) as reactive species driving the degradation process. This research underscores the substantial potential of S-scheme heterojunction photocatalysts for advanced wastewater treatment applications, offering a sustainable and effective solution to environmental remediation challenges.

复杂的s型异质结光催化剂的创建提出了一种通过改进电荷分离和光吸收来增强污染物降解的开创性方法。本研究介绍了一种新型的2D/3D BiOBr/TiO2 S-scheme异质结光催化剂，旨在提高抗生素污染物环丙沙星（CIP）在自然光照射下的降解效率。结构和形态表征证实了BiOBr纳米片成功集成到TiO2纳米颗粒上，从而获得了优化的异质结构。TiO2和BiOBr改性TiO2 （BiOBr/TiO2）均采用水热法和缓慢蒸发法制备。与纯TiO2相比，BiOBr/TiO2复合材料的可见光吸收能力显著增强，这是由于BiOBr的吸光特性和S-scheme异质结的有效形成。这种结构促进了有效的电荷分离，正如在电化学阻抗谱（EIS）分析中观察到的光致发光（PL）猝灭和电荷转移电阻降低所证明的那样。S-scheme机制使低能载流子选择性重组，同时保留高能电子和空穴，从而最大化氧化还原电位。在阳光照射下，BiOBr/TiO2复合材料对CIP的光催化降解率达到了令人印象深刻的93%，显著优于单独的TiO2和BiOBr。捕获实验强调了羟基自由基（•OH−）和超氧自由基（•O2−）作为驱动降解过程的活性物质的关键作用。这项研究强调了s型异质结光催化剂在高级废水处理应用中的巨大潜力，为环境修复挑战提供了可持续和有效的解决方案。

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引用次数: 0

3D printing of ZnO-modified hydroxyapatite scaffolds with directional pore microstructure for enhanced mechanical properties and biocompatibility 3D打印zno改性羟基磷灰石定向孔结构支架增强力学性能和生物相容性

IF 5.9 3区材料科学 Q2 CHEMISTRY, PHYSICAL

FlatChem

Pub Date : 2025-05-21 DOI: 10.1016/j.flatc.2025.100890

Xianglin Zhou , Wenya Zhou , Xiaolei Xie , Hongwei Chen , Mengli Li , Xu Zhen , Jing Ma , Zhiyang Lyu

Hydroxyapatite (HA) exhibits multifunctionality and wide applications in biological tissues such as vertebrate bones and teeth, due to facial element substitutions and chemical modifications of active surfaces in crystal structures with various inorganic or organic additives. It is a challenge to achieve biocompatible scaffolds that combine both high strength and toughness for the repair and regeneration of bone and tooth defects. In this study, we developed ZnO-modified hydroxyapatite 3D scaffolds with microscopic directional pore structures (∼20 μm) using a directional freezing-assisted direct-ink-writing (DIW) 3D printing technique. The directional pore microstructure significantly enhanced the mechanical properties compared to the non-directional scaffolds. Moreover, both experimental and molecular dynamics simulation results demonstrated that the incorporation of ZnO nanoparticles improved the sintering process, maintaining the directional pore microstructure while significantly increasing the mechanical strength. Notably, the coated hydroxyapatite scaffolds demonstrated excellent antimicrobial activity with ∼99 % antimicrobial resistance and biocompatibility with ∼89.96 % cell survival. This study presents an innovative approach for constructing directional porous hydroxyapatite scaffolds with multifunctionality and high mechanical properties, providing a promising foundation for advancements in dental restoration, implantable medical devices, and bone tissue engineering.

羟基磷灰石（HA）在脊椎动物骨骼和牙齿等生物组织中表现出多功能性和广泛的应用，这是由于各种无机或有机添加剂在晶体结构中的表面元素取代和活性表面的化学修饰。实现高强度和高韧性的生物相容性支架用于骨和牙齿缺损的修复和再生是一项挑战。在这项研究中，我们使用定向冷冻辅助直接墨水书写（DIW） 3D打印技术开发了具有微观定向孔结构（~ 20 μm）的zno改性羟基磷灰石3D支架。与非定向支架相比，定向孔结构显著提高了支架的力学性能。此外，实验和分子动力学模拟结果均表明，ZnO纳米颗粒的掺入改善了烧结过程，在保持定向孔微观结构的同时显著提高了机械强度。值得注意的是，包被的羟基磷灰石支架具有优异的抗菌活性，具有~ 99%的抗菌抗性和生物相容性，细胞存活率为~ 89.96%。本研究提出了一种具有多功能和高力学性能的定向多孔羟基磷灰石支架的创新方法，为牙体修复、植入式医疗器械和骨组织工程的发展提供了良好的基础。

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引用次数: 0

Structural engineering of N/S co-doped hard carbon anodes for enhanced potassium storage performance 氮/硫共掺杂硬碳阳极增强储钾性能的结构工程研究

IF 5.9 3区材料科学 Q2 CHEMISTRY, PHYSICAL

FlatChem

Pub Date : 2025-05-21 DOI: 10.1016/j.flatc.2025.100889

Chen Zhang, Tao Wang, Jinjue Zeng, Xuebin Wang

Potassium-ion batteries are an attractive replacement for lithium-ion batteries due to their abundance and economic viability. Nevertheless, its practical implementation is considerably obstructed by the inadequate electrochemical performance of carbonaceous anodes. A nitrogen/sulfur co-doped hard carbon (NSHC) material is synthesized via a straightforward pyrolysis process, employing phenolic resin and trithiocyanuric acid as the carbon and dopant precursors, respectively. Comprehensive structural analysis demonstrates that the dual-heteroatom co-doping effectively enlarges the interlayer distance and introduces substantial defects, both of which promote rapid potassium-ion diffusion and improve potassium-ion storage capability. Consequently, this optimized NSHC anode delivers exceptional electrochemical performance, including a capacity of 649.5 mAh g⁻¹ at 0.1 A g⁻¹ and a capacity of 100.1 mAh g⁻¹ at 10 A g⁻¹, outperforming that of the undoped hard carbon (HC) counterpart. This work illuminates the structure-property relationship about heteroatom-doped carbon, providing a strategic framework for advanced PIB anode design.

钾离子电池因其丰富和经济可行性而成为锂离子电池的有吸引力的替代品。然而，由于碳质阳极的电化学性能不足，其实际应用受到了很大的阻碍。以酚醛树脂和三硫氰尿酸为碳前驱体和掺杂前驱体，采用直接热解法合成了氮/硫共掺杂硬碳（NSHC）材料。综合结构分析表明，双杂原子共掺杂有效地扩大了层间距离，引入了大量缺陷，促进了钾离子的快速扩散，提高了钾离子的储存能力。因此，这种优化的NSHC阳极具有优异的电化学性能，包括在0.1 a g−1时的容量为649.5 mAh g−1，在10 a g−1时的容量为100.1 mAh g−1，优于未掺杂的硬碳（HC）阳极。这项工作阐明了杂原子掺杂碳的结构-性能关系，为先进的PIB阳极设计提供了战略框架。

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引用次数: 0

Improvement of solid-solid interface compatibility and capacitance retention of carbon electrode systems by using MXene as a transition layer 用MXene作为过渡层改善碳电极体系的固-固界面相容性和电容保持

IF 5.9 3区材料科学 Q2 CHEMISTRY, PHYSICAL

FlatChem

Pub Date : 2025-05-19 DOI: 10.1016/j.flatc.2025.100888

Yongfeng Bu , Yuman Li , Shihao Wang , Shengda Tang , Zhaomin Zhu , Li Pan , Hui Li , Hongyu Liang

The development of low-internal-resistance and high-stability Al current collectors suitable for supercapacitor organic electrolytes has been desired due to the highly susceptible oxidative passivation problem. Existing solution strategies mainly focus on traditional modification techniques such as carbon-based coatings and surface roughness modulation, making them significantly deficient in terms of interfacial impedance compatibility and electrochemical stability. Herein, an innovative interfacial work function matching strategy utilizing MXene (Ti₃C₂T_x) as a transition layer material is first reported to address these concerns. Using a simple self-assembly method, we constructed an MXene transition layer (Al@MX) on the Al surface, which reduces the equivalent series resistance by more than 80 % and effectively improves capacitance retention from 7 % for bare Al to 61 % for Al@MX after 1000 cycles, as well as remarkable cycling stability. More importantly, the solid-solid interfacial electron transport barrier between Al current collector and YP50F active carbon material is significantly reduced by 24.7 %. These experimental results fully demonstrate that the proposed strategy effectively inhibits the oxidation of the Al current collector and suppresses the decay of capacitance. The unique two-dimensional structure of MXene, combined with its excellent electrochemical stability, offers a potential solution to match the work function of interfacial materials such as between the Al current collector and the carbon active material. This insight in the internal resistance reduction lays a critical technological foundation for developing high-performance SCs, and highlights the potential of MXene in enhancing the charge transfer and storage efficiency of energy storage devices.

由于超级电容器有机电解质极易氧化钝化问题，开发适合于超级电容器有机电解质的低内阻、高稳定性的铝集流器已成为人们的迫切需要。现有的解决策略主要集中在传统的改性技术，如碳基涂层和表面粗糙度调制，使得它们在界面阻抗兼容性和电化学稳定性方面显着不足。本文首次报道了一种利用MXene （Ti3C2Tx）作为过渡层材料的创新性接口功函数匹配策略来解决这些问题。利用简单的自组装方法，我们在Al表面构建了MXene过渡层（Al@MX），该过渡层将等效串联电阻降低了80%以上，并在1000次循环后有效地将电容保持率从裸露Al的7%提高到Al@MX的61%，并且具有显着的循环稳定性。更重要的是，Al集流器与YP50F活性炭材料之间的固-固界面电子传递势垒显著降低了24.7%。实验结果充分表明，该策略有效地抑制了铝集流器的氧化，抑制了电容的衰减。MXene独特的二维结构，结合其优异的电化学稳定性，为匹配界面材料（如Al集流器和碳活性材料之间）的功功能提供了潜在的解决方案。这一内阻降低的见解为开发高性能SCs奠定了关键的技术基础，并突出了MXene在提高储能设备的电荷转移和存储效率方面的潜力。

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引用次数: 0

Phosphorus-containing nickel-based coatings for enhanced corrosion resistance and mechanical performance: A review 提高耐蚀性和机械性能的含磷镍基涂层研究进展

IF 5.9 3区材料科学 Q2 CHEMISTRY, PHYSICAL

FlatChem

Pub Date : 2025-05-17 DOI: 10.1016/j.flatc.2025.100887

Jiahuan Chen , Yuxin Deng , Ranran Cao , Ping Wang , Yanhua Mao , Chengxue Yi , Siqiao Zhang , Tingting Zhang , Xiang Liu

Phosphorus (P), a well-established solid solution strengthening agent, can induce significant lattice distortions in metallic systems. The movement of dislocations in metals is obstructed, leading to improved ductility and toughness. Nickel‑phosphorus coatings, such as NiP, Ni-Co-P, Ni-W-P, and Ni-P-TiO₂ composites, exhibit exceptional mechanical performance and excellent corrosion resistance. Thus, Ni-P-based coatings are widely employed in various industrial sectors, including petrochemical processing, mechanical components, and medical devices. With the advancement of emerging manufacturing technologies, growing demands for advanced surface engineering have driven the development of diverse innovative high-performance phosphorus-containing coatings. Utilizing electroless deposition and electroplating techniques, we have developed novel anodized electroplating and sol-reinforced composite electroplating approaches. Nickel‑phosphorus coatings fabricated via anodic electroplating and sol-enhanced composite electroplating techniques demonstrate exceptional mechanical properties and anti-corrosion performance. The paper presents a comprehensive review of the structure-property relationships in novel nickel‑phosphorus coatings. It also focuses on the friction and corrosion mechanisms of NiP composite coatings and outlines promising research directions for future advancement and commercialization.

磷(P)是一种公认的固溶体强化剂，可引起金属体系中显著的晶格畸变。阻碍了位错在金属中的移动，从而提高了金属的延展性和韧性。镍磷涂层，如NiP， Ni-Co-P， Ni-W-P和Ni-P-TiO 2复合材料，具有优异的机械性能和优异的耐腐蚀性。因此，镍磷基涂料广泛应用于各种工业部门，包括石油化工加工、机械部件和医疗设备。随着新兴制造技术的进步，对先进表面工程的需求不断增长，推动了各种创新型高性能含磷涂料的发展。利用化学沉积和电镀技术，我们开发了新的阳极电镀和溶胶增强复合电镀方法。通过阳极电镀和溶胶增强复合电镀技术制备的镍磷涂层具有优异的机械性能和防腐性能。本文综述了新型镍磷涂料的结构与性能关系。它还重点讨论了NiP复合涂层的摩擦和腐蚀机制，并概述了未来发展和商业化的有前途的研究方向。

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引用次数: 0