Hao Xiaodong, Wang Jie, Ding Bing, Shen Laifa, Xu Yunling, Wang Ya, Chang Zhi, Dou Hui, Lu Xiangjun, Zhang Xiaogang
Jiangsu Key Laboratory of Material and Technology for Energy Conversion, College of Material Science and Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, P.R. China.
School of Material Science and Engineering, Xiamen University of Technology, Xiamen, 361024, P.R. China.
Chemistry. 2016 Nov 7;22(46):16668-16674. doi: 10.1002/chem.201602922. Epub 2016 Oct 5.
High-performance electrical double-layer capacitors (EDLCs) require carbon electrode materials with high specific surface area, short ion-diffusion pathways, and outstanding electrical conductivity. Herein, a general approach combing the molten-salt method and chemical activation to prepare N-doped carbon nanosheets with high surface area (654 m g ) and adjustable porous structure is presented. Owing to their structural features, the N-doped carbon nanosheets exhibited superior capacitive performance, demonstrated by a maximum capacitance of 243 F g (area-normalized capacitance up to 37 μF cm ) at a current density of 0.5 A g in aqueous electrolyte, high rate capability (179 F g at 20 A g ), and excellent cycle stability. This method provides a new route to prepare porous and heteroatom-doped carbon nanosheets for high-performance EDLCs, which could also be extended to other polymer precursors and even waste biomass.
高性能双电层电容器（EDLCs）需要具有高比表面积、短离子扩散路径和出色导电性的碳电极材料。在此，提出了一种将熔盐法和化学活化相结合的通用方法，以制备具有高表面积（654 m²/g）和可调多孔结构的氮掺杂碳纳米片。由于其结构特点，氮掺杂碳纳米片表现出优异的电容性能，在水性电解质中，电流密度为0.5 A/g时，最大电容为243 F/g（面积归一化电容高达37 μF/cm²），高倍率性能（20 A/g时为179 F/g），以及出色的循环稳定性。该方法为制备用于高性能EDLCs的多孔和杂原子掺杂碳纳米片提供了一条新途径，这也可以扩展到其他聚合物前驱体甚至废弃生物质。
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