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山东大学学报 (工学版) ›› 2018, Vol. 48 ›› Issue (6): 132-136.doi: 10.6040/j.issn.1672-3961.0.2017.056

• 其他 • 上一篇    

石墨烯化石墨/聚苯胺电极的制备及电容特性

王晓丹(),高明明*()   

  1. 山东大学环境科学与工程学院, 山东 济南 250100
  • 收稿日期:2017-02-17 出版日期:2018-12-20 发布日期:2018-12-26
  • 通讯作者: 高明明 E-mail:xdwang@mail.sdu.edu.cn;mmgao@sdu.edu.cn
  • 作者简介:王晓丹(1990—)，男，陕西宝鸡人，硕士研究生，主要研究方向为电催化.E-mail: xdwang@mail.sdu.edu.cn
  • 基金资助:
    国家自然科学基金资助项目(51108250);山东省自然科学基金资助项目(ZR2015EM028);山东大学基本科研经费资助项目(2015JC017)

Polyaniline modified graphene layers/graphite plate electrode for supercapacitor

Xiaodan WANG(),Mingming GAO*()   

  1. School of Environmental Science and Engineering, Shandong University, Jinan 250100, Shandong, China
  • Received:2017-02-17 Online:2018-12-20 Published:2018-12-26
  • Contact: Mingming GAO E-mail:xdwang@mail.sdu.edu.cn;mmgao@sdu.edu.cn
  • Supported by:
    国家自然科学基金资助项目(51108250);山东省自然科学基金资助项目(ZR2015EM028);山东大学基本科研经费资助项目(2015JC017)

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摘要：

通过电解剥落得到的表面石墨烯化的石墨电极(graphene layers/graphite plate, GL/GP)为基底,在硫酸介质中以苯胺为单体,采用循环伏安法(cyclic voltammetry, CV)制备了表面石墨烯化的石墨/聚苯胺(graphene layers/graphite plate/polyaniline, GL/GP/PANI)电极,并探究聚合圈数对GL/GP/PANI电极比电容的影响。利用场发射扫描电镜(scanning electron microscope, SEM)对电极材料的形貌进行表征。在0.5 M H2SO4电解液中,对合成的电极材料进行循环伏安、恒电流充放电(chronopotentiometry, CP)和电化学稳定性测试。结果表明,在表面石墨烯化的石墨电极上合成的PANI具有棒状结构,电流密度为0.085 mA/cm2时, GL/GP/PANI电容器的比电容可达1 042.8 F/g。提供了一种新的超级电容材料基底电极的构建方式。

关键词: 聚苯胺, 石墨烯, 电解剥落, 超级电容

Abstract:

Polyaniline modified graphene layers/graphite plate (GL/GP/PANI) electrodes were prepared by electrochemical polymerization of aniline on graphene layers/graphite electrodes, which were obtained via in-situ formation of graphene layers on graphite plate by electrochemical exfoliation. The effect of polymerization cycle to specific capacitance of GL/GP/PANI was investigated. The surface features of the electrodes were characterized by SEM. The electrochemical performances of the electrodes were measured in 0.5 M H2SO4 electrolyte, including cyclic voltammetry, galvanostatic charge-discharge and electrochemical stability test. The results indicated that the PANI on the GL/GP electrodes had rodlike structure. At current density of 0.085 mA/cm2, the specific capacitance GL/GP/PANI reached 1 042.8 F/g. This study provided a new way to fabricate substrate electrode material for supercapacitor.

Key words: polyanline, graphene, electrochemical exfoliation, supercapacitor

中图分类号: 

  • O646.541

图1

GL/GP的SEM照片"

图2

GL/GP表面电聚合不同圈数PANI循环伏安图"

图3

GL/GP/PANI-5的扫描电镜图"

图4

GL/GP/PANI-5的循环伏安曲线"

图5

不同电极材料恒电流充放电曲线"

表1

不同聚合圈数聚苯胺电极材料的比电容"

电极 面积比电容/
(mF·cm-2)		 质量比电容/
(F·g-1)
GL/GP 37.09
GL/GP/PANI-5 145.99 1 042.8
GL/GP/PANI-10 169.76 1 041.4
GL/GP/PANI-15 193.53 744.8

图6

GL/GP/PANI-5随循环次数充放电曲线"

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