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Nitrogen Self-Doped Porous Carbon for High-Performance Supercapacitors
ACS Applied Energy Materials ( IF 5.4 ) Pub Date : 2020-01-08 00:00:00 , DOI: 10.1021/acsaem.9b02077
Youning Gong 1, 2 , Delong Li 3 , Qiang Fu 4 , Yupeng Zhang 3 , Chunxu Pan 1, 2, 4
Affiliation  

Supercapacitor electrodes based on carbonaceous materials with hierarchical porosity and localized graphitic structure can help supercapacitors to achieve considerable energy capacity. In this work, chitosan-derived hierarchically porous graphitic carbon (CS-HPGC) with nitrogen self-doping was synthesized via a simple and green approach using potassium ferrate (K2FeO4). Different from conventional templating or two-step strategies, this method allows the accomplishment of carbonization, graphitization, and heteroatom modification in a one-step process. Endowed with the characteristics of hierarchical porosity, high graphitization degree, and N-doping, the CS-HPGC electrode showed a high specific capacitance of 332 F g–1 at 0.5 A g–1. Furthermore, the assembled CS-HPGC symmetric supercapacitors delivered an energy density of 10.2 Wh kg–1 at the power density of 100 W kg–1 in aqueous electrolyte (KOH) and 63.3 Wh kg–1 at 300 W kg–1 in ionic liquid electrolyte (EMIM TFSI). This synthetic strategy may pave the way for the development of natural and renewable biomass resources for sustainable energy systems.

中文翻译:

用于高性能超级电容器的氮自掺杂多孔碳

基于具有分层孔隙率和局部石墨结构的碳质材料的超级电容器电极可以帮助超级电容器获得相当大的能量容量。在这项工作中,使用高铁酸钾(K 2 FeO 4)通过一种简单且绿色的方法合成了具有自掺杂氮的壳聚糖衍生的分层多孔石墨碳(CS-HPGC )。与常规模板化或两步策略不同,此方法允许在一步过程中完成碳化,石墨化和杂原子修饰。具有分层孔隙度,高石墨化度和N掺杂的特性,CS-HPGC电极在0.5 A g –1的条件下显示出332 F g –1的高比电容。。此外,组装的CS-HPGC对称超级电容器在水性电解质(KOH)中的功率密度为100 W kg –1时,能量密度为10.2 Wh kg –1;在离子液体中,在300 W kg –1下,能量密度为63.3 Wh kg –1。电解质(EMIM TFSI)。这种综合策略可能为开发用于可持续能源系统的天然和可再生生物质资源铺平道路。
更新日期:2020-01-08
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