超级电容器
材料科学
共沉淀
碳纳米管
纳米复合材料
电极
碳化
储能
化学工程
法拉第效率
水溶液
纳米颗粒
功率密度
碳纤维
电化学
电解质
纳米技术
化学
复合材料
功率(物理)
复合数
有机化学
扫描电子显微镜
物理化学
工程类
物理
量子力学
作者
Dianyuan Zheng,Chengxiang Sun,Wenxia Pan,Gengtao Guo,Yuhang Zheng,Cheng Liu,Jian-Hong Zhu
出处
期刊:Energy & Fuels
[American Chemical Society]
日期:2021-10-04
卷期号:35 (20): 16915-16924
被引量:9
标识
DOI:10.1021/acs.energyfuels.1c02581
摘要
A cost-effective high-performance asymmetric supercapacitor (ASC) with a functionalized carbon nanotube (FCNT) film and Fe2O3@C nanocomposite grown on carbon paper is fabricated in aqueous KOH electrolyte. The Fe2O3@C nanoparticles are prepared through a facile coprecipitation and carbonization method. By virtue of their unique three-dimensional nanostructure for excellent electrical conductivity and easy access to electrolyte, the established novel aqueous ASC device possesses a wide working potential window from 0 to 1.5 V and presents superb electrochemical properties with excellent rate performance and a high energy density of 21.21 Wh kg–1. A synergistic effect of capacitive and faradaic charge-storage mechanisms may be responsible for the superior performance. This research may herald the advent of ASC device potential application for electrical vehicles, smart power grids, and intermittent renewable energy sources.
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