期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 901, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2022.163624
关键词
Heteroatom dopant; Hierarchically porous carbon; Ultra-high specific surface area; High electrochemical performance; Symmetric supercapacitor
资金
- National Key Research and Development Program of China [2017YFA0402902]
- National Natural Science Foundation of China [U2032154]
- Key Research and Development Program of Anhui [202004a05020072]
- National Synchrotron Radiation Laboratory [KY2060000177]
- USTC Center for Micro and Nanoscale Research and Fabrication
- Shenzhen NEWARE New Energy Technology Co. Ltd.
In this study, oxide-doped hierarchically porous carbon materials with high specific surface area were synthesized and demonstrated excellent electrochemical performance. The results suggest that the oxide-doped HPCs have great potential for application in supercapacitors.
Suffering from a relatively low energy density, carbon-based supercapacitors are restricted in the practical applications for green energy. However, heteroatom-doped hierarchically porous carbon materials (HPCs) can deliver prominent electrochemical performance as an electrode material. Herein, we report a simple two-step method for the synthesis of oxide-doped HPC with an ultra-high specific surface area of 3043.3 m(2 )g(-1). In a three-electrode system, the specific capacitance of the oxide-doped HPC is as high as 375 F g(-1) at 1 A g(-1). Also, an aqueous symmetric supercapacitor (AS) assembled with the oxide-doped HPC achieves a high specific capacitance of 353 F g(-1) at 1 A g(-1) and excellent rate performance of 84.9% capacitance retention with current density up to 10 A g(-1). Most importantly, the energy density of the AS in the 3 M KOH solution can reach up to 17.7 Wh g(-1) at a power density of 600 W g(-1). In 1 M Na2SO4 solution, the specific capacitance of the AS shows no decay after 5000 cycles at 5 A g(-1). These results reveal that the as-prepared oxide-doped HPC has great potential as an electrode material to realize remarkable electrochemical per formance in supercapacitors. (C) 2022 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据