无机材料学报 ›› 2021, Vol. 36 ›› Issue (7): 711-717.DOI: 10.15541/jim20200033

所属专题: 【虚拟专辑】超级电容器(2020~2021)

• 研究论文 • 上一篇    下一篇

氮/硫共掺杂对纤水镁石模板碳纳米管电化学性能的影响

刘芳芳1(), 传秀云1(), 杨扬1, 李爱军1,2   

  1. 1.北京大学 地球与空间科学学院, 造山带与地壳演化教育部重点实验室, 北京 100871
    2.北京金羽新能科技有限公司, 北京 100095
  • 收稿日期:2020-01-15 修回日期:2020-12-03 出版日期:2021-07-20 网络出版日期:2020-12-10
  • 通讯作者: 传秀云, 教授. E-mail:xychuan@pku.edu.cn
  • 作者简介:刘芳芳(1995-), 女, 博士研究生. E-mail:liuff4069@163.com
  • 基金资助:
    国家自然科学基金重点项目(51774016);国家自然科学基金重点项目(52074015);北京大学开放测试基金(0000012321);北京大学翁洪武科研原创基金(WHW201803)

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)

摘要:

以天然矿物纤水镁石为模板、蔗糖为碳源制备多孔碳纳米管, 并以硫脲为氮、硫源, 采用水热法制备氮/硫共掺杂的碳纳米管。结果表明, 掺杂碳纳米管继承了纤水镁石模板的柱状结构, 呈现中空管状, 增大了模板炭的比表面积和孔容。在6 mol·L-1 KOH电解液中, 电流密度为1 A·g-1时, 未掺杂碳纳米管的比电容为62.2 F·g-1, 氮掺杂之后碳纳米管的比电容为97.0 F·g-1, 氮/硫共掺杂的碳纳米管比电容为172.0 F·g-1, 氮/硫共掺杂后碳纳米管的电化学性能比未掺杂的提高近3倍; 循环1000次电容保持率达89%, 说明掺/硫共掺杂碳纳米管具有良好的电化学性能。此外, 组装的对称型超级电容器同样展示了良好的电容性能。

关键词: 超级电容器, 纤水镁石, 氮/硫共掺杂, 碳纳米管, 电化学性能

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

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