Journal of Shandong University(Engineering Science) ›› 2018, Vol. 48 ›› Issue (6): 132-136.doi: 10.6040/j.issn.1672-3961.0.2017.056

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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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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

CLC Number: 

  • O646.541

Fig.1

SEM image of GL/GP"

Fig.2

CV curves of electrochemical polymerization of PANI film with different cycles on GL/GP"

Fig.3

SEM image of GL/GP/PANI-5"

Fig.4

CV curves of GL/GP/PANI-5"

Fig.5

Galvanostatic charge-discharge curves of different electrodes"

Table 1

Discharge specific capacitance of PANI modified electrodes with different electrochemical polymerization cycles"

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

Fig.6

Cycle life curve of GL/GP/PANI-5"

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