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author:

Li, Xi-Ran (Li, Xi-Ran.) [1] | Jiang, Yang-Hui (Jiang, Yang-Hui.) [2] | Wang, Pei-Zhi (Wang, Pei-Zhi.) [3] | Mo, Yan (Mo, Yan.) [4] | Lai, Wen-De (Lai, Wen-De.) [5] | Li, Zheng-Jiong (Li, Zheng-Jiong.) [6] | Yu, Ru-Ji (Yu, Ru-Ji.) [7] | Du, Yu-Ting (Du, Yu-Ting.) [8] | Zhang, Xin-Ren (Zhang, Xin-Ren.) [9] | Chen, Yong (Chen, Yong.) [10]

Indexed by:

EI PKU CSCD

Abstract:

Oxygen functional groups on a commercial activated carbon were modified by (NH4)2S2O8 oxidation and subsequent annealing at different temperatures. The effects of the surface modification on the electrochemical performance as supercapacitor electrodes were investigated by XPS, FTIR, argon adsorption and electrochemical tests. Results indicate that the oxygen functional groups, especially carboxyl and carbonyl groups improved the wettability of the pore surfaces, increased the electrolyte diffusion rate into the electrode and increased the specific capacitance by an additional pseudo-capacitance in a 6 mol/L KOH aqueous electrolyte. An excess oxygen content blocked the pores, leading to poor electrochemical performance, but annealing at 300 in an inert atmosphere increased the specific capacitance and improved the rate performance in a 6 mol/L KOH aqueous electrolyte. In a 1 mol/L Et4NBF4/PC organic electrolyte, however, oxygen functional groups introduced by (NH4)2S2O8 oxidation reduced the specific capacitance and annealing at 700 to reduce their content effectively increased the specific capacitance. © 2020, Science Press. All right reserved.

Keyword:

Activated carbon Ammonium persulfate Annealing Capacitance Electrochemical electrodes Electrolytes Oxygen Potassium hydroxide Supercapacitor

Community:

  • [ 1 ] [Li, Xi-Ran]State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan Provincial Key Laboratory of Research on Utilization of Si-Zr-Ti Resources, College of Materials Science and Engineering, Haikou; 570228, China
  • [ 2 ] [Jiang, Yang-Hui]State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan Provincial Key Laboratory of Research on Utilization of Si-Zr-Ti Resources, College of Materials Science and Engineering, Haikou; 570228, China
  • [ 3 ] [Wang, Pei-Zhi]State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan Provincial Key Laboratory of Research on Utilization of Si-Zr-Ti Resources, College of Materials Science and Engineering, Haikou; 570228, China
  • [ 4 ] [Mo, Yan]State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan Provincial Key Laboratory of Research on Utilization of Si-Zr-Ti Resources, College of Materials Science and Engineering, Haikou; 570228, China
  • [ 5 ] [Lai, Wen-De]State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan Provincial Key Laboratory of Research on Utilization of Si-Zr-Ti Resources, College of Materials Science and Engineering, Haikou; 570228, China
  • [ 6 ] [Li, Zheng-Jiong]State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan Provincial Key Laboratory of Research on Utilization of Si-Zr-Ti Resources, College of Materials Science and Engineering, Haikou; 570228, China
  • [ 7 ] [Yu, Ru-Ji]State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan Provincial Key Laboratory of Research on Utilization of Si-Zr-Ti Resources, College of Materials Science and Engineering, Haikou; 570228, China
  • [ 8 ] [Du, Yu-Ting]State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan Provincial Key Laboratory of Research on Utilization of Si-Zr-Ti Resources, College of Materials Science and Engineering, Haikou; 570228, China
  • [ 9 ] [Zhang, Xin-Ren]State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan Provincial Key Laboratory of Research on Utilization of Si-Zr-Ti Resources, College of Materials Science and Engineering, Haikou; 570228, China
  • [ 10 ] [Chen, Yong]State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan Provincial Key Laboratory of Research on Utilization of Si-Zr-Ti Resources, College of Materials Science and Engineering, Haikou; 570228, China
  • [ 11 ] [Chen, Yong]Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Nankai University, Tianjin; 300071, China
  • [ 12 ] [Chen, Yong]Fujian Provincial Key Laboratory of Electrochemical Energy Storage Materials, Fuzhou University, Fuzhou; 350116, China

Reprint 's Address:

  • [chen, yong]key laboratory of advanced energy materials chemistry (ministry of education), nankai university, tianjin; 300071, china;;[chen, yong]fujian provincial key laboratory of electrochemical energy storage materials, fuzhou university, fuzhou; 350116, china;;[chen, yong]state key laboratory of marine resource utilization in south china sea, hainan provincial key laboratory of research on utilization of si-zr-ti resources, college of materials science and engineering, haikou; 570228, china

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Source :

New Carbon Materials

ISSN: 1007-8827

Year: 2020

Issue: 3

Volume: 35

Page: 232-243

1 . 9 0 5

JCR@2020

6 . 6 0 0

JCR@2023

ESI HC Threshold:196

JCR Journal Grade:4

CAS Journal Grade:3

Cited Count:

WoS CC Cited Count:

SCOPUS Cited Count: 116

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 0

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