Preparation and electrochemical performances of PEDOT/sulfonic acid-functionalized graphene composite hydrogel

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• 作者：Yongqin Han^a ; ^{yongqinhan@126.com} ; Mingxia Shen^a ; ^{mxshen@hhu.edu.cn} ; Ying Wu^a ; Jiajia Zhu^b ; Bing Ding^b ; Hao Tong^b ; Xiaogang Zhang^b ; ^{azhangxg@163.com}
• 关键词：Poly(3 ; 4-ethylenedioxythiophene) ; Graphene ; Composite hydrogel ; Electrochemical performance
• 刊名：Synthetic Metals
• 出版年：2013
• 出版时间：15 May, 2013
• 年：2013
• 卷：172
• 期：Complete
• 页码：21-27
• 全文大小：2502 K

文摘

Poly(3,4-ethylenedioxythiophene) (PEDOT)/sulfonic acid-functionalized graphene composite hydrogel was prepared by introducing microcontent of sulfonic acid-functionalized graphene (SFG) using in situ polymerization. The specific capacitance of the composite hydrogel was significantly improved by the introduction of SFG when the feeding ratio of SFG to 3,4-ethylenedioxythiophene (EDOT) was as low as 1:1000, the specific capacitance of the composite hydrogel can reach 93 F/g, which was more than two times than that of the pure PEDOT hydrogel (39 F/g). The composite hydrogel showed a high specific capacitance of 135 and 220 F/g at high current density (5 A/g) when KI and K₃Fe(CN)₆-H₂SO₄ solution were employed as redox-active electrolytes, respectively. The composite hydrogel in K₃Fe(CN)₆-H₂SO₄ can be used as potential electrode material for supercapacitor applications.