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高等学校化学研究 ›› 2022, Vol. 38 ›› Issue (4): 1065-1072.doi: 10.1007/s40242-021-1360-7

• Articles • 上一篇    下一篇

Development of the Self-doping Porous Carbon and Its Application in Supercapacitor Electrode

YANG Zhichen, KANG Xiaoting, ZOU Bo, YUAN Xuna, LI Yajie, WU Qin, GUO Yupeng   

  1. College of Chemistry, Jilin University, Changchun 130012, P. R. China
  • 收稿日期:2021-09-08 修回日期:2021-11-28 出版日期:2022-08-01 发布日期:2022-07-01
  • 通讯作者: GUO Yupeng E-mail:guoyupeng@jlu.edu.cn
  • 基金资助:
    This work was supported by the National Natural Science Foundation of China (No.51972141).

Development of the Self-doping Porous Carbon and Its Application in Supercapacitor Electrode

YANG Zhichen, KANG Xiaoting, ZOU Bo, YUAN Xuna, LI Yajie, WU Qin, GUO Yupeng   

  1. College of Chemistry, Jilin University, Changchun 130012, P. R. China
  • Received:2021-09-08 Revised:2021-11-28 Online:2022-08-01 Published:2022-07-01
  • Contact: GUO Yupeng E-mail:guoyupeng@jlu.edu.cn
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (No.51972141).

摘要: The massive discharge of biomass wastes not only causes waste of resources, but also pollutes the environment. Therefore, converting biomass wastes into carbon materials is an effective way to solve the above problems. Here, using biomass waste pig nails as raw materials and K2CO3 as chemical activators, the N-doped porous carbon(KPNC) is prepared by direct pyrolysis. As an electrode for supercapacitors, the electrochemical tests of KPNCs showed that they exhibited good electrochemical performance and excellent cycling stability. When the current density is 0.2 A/g, the specific capacitance is up to 344.6 F/g. Moreover, it still maintains 97.6% initial capacitance retention after 2000 cycles at a high current density of 5 A/g. Above exceptional electrochemical performances may be ascribed to an appropriate porous structure(Smicro/Stotal=80.31%, Vmicro/Vtotal=76.19%), high nitrogen contents(4.44%, atomic fraction), oxygen contents(9.13%, atomic fraction) as well as small internal resistance. The above experimental results show that the conversion of pig nails to porous carbon can reduce the waste of resources and alleviate environmental pollution.

关键词: Supercapacitor, Porous carbon, Biomass waste, Heteroatom doping, Electrochemical performance

Abstract: The massive discharge of biomass wastes not only causes waste of resources, but also pollutes the environment. Therefore, converting biomass wastes into carbon materials is an effective way to solve the above problems. Here, using biomass waste pig nails as raw materials and K2CO3 as chemical activators, the N-doped porous carbon(KPNC) is prepared by direct pyrolysis. As an electrode for supercapacitors, the electrochemical tests of KPNCs showed that they exhibited good electrochemical performance and excellent cycling stability. When the current density is 0.2 A/g, the specific capacitance is up to 344.6 F/g. Moreover, it still maintains 97.6% initial capacitance retention after 2000 cycles at a high current density of 5 A/g. Above exceptional electrochemical performances may be ascribed to an appropriate porous structure(Smicro/Stotal=80.31%, Vmicro/Vtotal=76.19%), high nitrogen contents(4.44%, atomic fraction), oxygen contents(9.13%, atomic fraction) as well as small internal resistance. The above experimental results show that the conversion of pig nails to porous carbon can reduce the waste of resources and alleviate environmental pollution.

Key words: Supercapacitor, Porous carbon, Biomass waste, Heteroatom doping, Electrochemical performance