Journal of Inorganic Materials ›› 2021, Vol. 36 ›› Issue (7): 711-717.DOI: 10.15541/jim20200033

Special Issue: 【虚拟专辑】超级电容器(2020~2021) 【能源环境】超级电容器(202409)

• RESEARCH ARTICLE • Previous Articles     Next Articles

Influence of N/S Co-doping on Electrochemical Property of Brucite Template Carbon Nanotubes

LIU Fangfang1(), CHUAN Xiuyun1(), YANG Yang1, LI Aijun1,2   

  1. 1. The Key Laboratory of Orogenic Belts and Crustal Evolution (MOE), School of Earth and Space Sciences, Peking University, Beijing 100871, China
    2. Golden Feature Science and Technology Ltd, Beijing 100095, China
  • Received:2020-01-15 Revised:2020-12-03 Published:2021-07-20 Online:2020-12-10
  • Contact: CHUAN Xiuyun, professor. E-mail:xychuan@pku.edu.cn
  • About author:LIU Fangfang(1995-), female, PhD candidate. E-mail:liuff4069@163.com
  • Supported by:
    National Natural Science Foundation of China(51774016);National Natural Science Foundation of China(52074015);Test Fund of Peking University(0000012321);Weng Hongwu Original Research Fund of Peking University(WHW201803)

Abstract:

N/S doped carbon nanotubes were prepared with natural mineral fibrous brucite as template, sucrose as carbon source, and thiourea as nitrogen and sulfur source. Experimental results indicate that the doped carbon nanotubes inherit the one-dimensional columnar structure of the fibrous brucite template. In addition, it presents a hollow tubular structure, which increases the specific surface area and pore volume of the template carbon. In 6 mol·L-1 KOH electrolyte, the electrochemical performance significantly improves after doping. CNT-N/S presents a high specific capacity of 172.0 F·g-1 at current density of 1 A·g-1, higher than those of CNT (62.2 F·g-1) and CNT-N (97.0 F·g-1). The capacitance of the N/S doped carbon nanotubes remains 89% after 1000 charge-discharge cycles. Furthermore, the assembled symmetrical supercapacitor also shows good capacitance performance.

Key words: supercapacitor, brucite, N/S co-doping, carbon nanotube, electrochemical performance

CLC Number: