Ashish Singh, Sushmita Bhartiya, Rashmi Singh, Indranil Bhaumik, D K Kohli, M K Singh
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Further, synergetic effect of the improved wettability due to inclusion of heterogeneous species, increased conductivity due to incorporation of graphitic nitrogen and high content of pseudocapacitive pyridinic as well as pyrrolic nitrogen in the carbon network, resulted high specific capacitance of ~218 F g<sup>−1</sup>. The N–CA-based supercapacitor (SC) module was fabricated with 18S-2P cell configuration with cell capacitance of ~450 F. Using international testing standards IEC/EN 62391, overall capacitance of ~61.8 F at 12.5 V operation containing total energy storage of ~4.5 kJ with low equivalent series resistance (ESR) of ~5.5 mΩ was achieved for the fabricated SC module. These parameters are comparable to the similar module of Maxwell Inc. 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引用次数: 0
摘要
在各种纳米形式的碳中,碳气凝胶(CA)因其三维相互连接的介孔结构、高比表面积和良好的导电性而被探索用作超级电容器的电极材料。为了进一步提高其功效,我们采用间苯二酚、三聚氰胺和糠醛在异丙醇介质中于 130°C 和 ~20 bar 溶剂热凝胶化的方法合成了掺氮的 CA。根据先前的详细研究,掺氮 CA(N-CA)的比表面积和中孔表面积最大,约为 10.6%,被用于制造超级电容器。此外,在碳网络中加入异质物种改善了润湿性,加入石墨氮提高了导电性,以及加入高含量的假电容吡啶氮和吡咯氮,这些协同效应产生了约 218 F g-1 的高比电容。根据国际测试标准 IEC/EN 62391,在 12.5 V 工作电压下,所制造的 N-CA 超级电容器(SC)模块的总电容为 ~61.8 F,总储能为 ~4.5 kJ,等效串联电阻(ESR)低至 ~5.5 mΩ。这些参数与麦克斯韦公司的类似模块相当。该模块已被证明可曲柄点动 998 cc 的汽车发动机,点火时的电流约为 208 A。
Development of nitrogen-doped carbon aerogel-based 60 Farad, 4.5 kJ supercapacitor module
Among various nano-forms, carbon being explored as electrode materials for supercapacitor, carbon aerogels (CA) manifest several excellent features owing to their 3D interconnected mesoporous structure, high surface area and good electrical conductivity. With an objective for further enhancement of its efficacy, CA doped with nitrogen was synthesized using solvo-thermal gelation of resorcinol, melamine and furfuraldehyde in isopropyl alcohol medium at 130°C and ~20 bar. Based on the earlier detailed investigation, ~10.6 at.% of nitrogen-doped CA (N–CA) that exhibits the highest specific surface area and mesopore surface area was used for the fabrication of supercapacitor. Further, synergetic effect of the improved wettability due to inclusion of heterogeneous species, increased conductivity due to incorporation of graphitic nitrogen and high content of pseudocapacitive pyridinic as well as pyrrolic nitrogen in the carbon network, resulted high specific capacitance of ~218 F g−1. The N–CA-based supercapacitor (SC) module was fabricated with 18S-2P cell configuration with cell capacitance of ~450 F. Using international testing standards IEC/EN 62391, overall capacitance of ~61.8 F at 12.5 V operation containing total energy storage of ~4.5 kJ with low equivalent series resistance (ESR) of ~5.5 mΩ was achieved for the fabricated SC module. These parameters are comparable to the similar module of Maxwell Inc. The module has been demonstrated for cranking a car engine of 998 cc and a current of ~208 A was drawn at the time of ignition.
期刊介绍:
The Bulletin of Materials Science is a bi-monthly journal being published by the Indian Academy of Sciences in collaboration with the Materials Research Society of India and the Indian National Science Academy. The journal publishes original research articles, review articles and rapid communications in all areas of materials science. The journal also publishes from time to time important Conference Symposia/ Proceedings which are of interest to materials scientists. It has an International Advisory Editorial Board and an Editorial Committee. The Bulletin accords high importance to the quality of articles published and to keep at a minimum the processing time of papers submitted for publication.