Citation: Aiqin Xiang, Shuai Xie, Fei Pan, Hongchang Jin, Yiheng Zhai, Yanwu Zhu, Xianghua Kong, Hengxing Ji. Cobalt and nitrogen atoms co-doped porous carbon for advanced electrical double-layer capacitors[J]. Chinese Chemical Letters, ;2021, 32(2): 830-833. doi: 10.1016/j.cclet.2020.04.058 shu

Cobalt and nitrogen atoms co-doped porous carbon for advanced electrical double-layer capacitors

Aiqin Xiang ^a ,
Shuai Xie ^b ,
Fei Pan ^c ,
Hongchang Jin ^b ,
Yiheng Zhai ^a ,
Yanwu Zhu ^c ,
Xianghua Kong ^{a, d, *,} ,
Hengxing Ji ^{b, **,}

a.
School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei 230009, China
b.
Hefei National Laboratory for Physical Sciences at the Microscale, CAS Key Laboratory of Materials for Energy Conversion, Department of Applied Chemistry, University of Science and Technology of China, Hefei 230026, China
c.
Hefei National Laboratory for Physical Sciences at the Microscale, CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, China
d.
CAS Key Laboratory of Materials for Energy Conversion, Hefei 230026, China

^**

kongxh@hfut.edu.cn

jihengx@ustc.edu.cn

Received Date: 17 February 2020
Revised Date: 19 April 2020
Accepted Date: 30 April 2020
Available Online: 11 May 2020

Figures(4)

Electrical double-layer capacitors are widely concerned for their high power density, long cycling life and high cycling efficiency. However, their wide application is limited by their low energy density. In this study, we propose a simple yet environmental friendly method to synthesize cobalt and nitrogen atoms co-doped porous carbon (CoAT-NC) material. Cobalt atoms connected with primarily pyridinic nitrogen atoms can be uniformly dispersed in the amorphous carbon matrix, which is benefit for improving electrical conductivity and density of states of the carbon material. Therefore, an enhanced performance is expected when CoAT-NC is served as electrode in a supercapacitor device. CoAT-NC displays a good gravimetric capacitance of 160 F/g at 0.5 A/g combing with outstanding capacitance retention of 90% at an extremely high current density of 100 A/g in acid electrolyte. Furthermore, a good energy density of 30 Wh/kg can be obtained in the organic electrolyte.
- Electrical double-layer capacitors,
- Cobalt atoms,
- Pyridinic nitrogen,
- Co-doped,
- Density of states
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