A novel redox-mediated gel polymer electrolyte for high-performance supercapacitor

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• 作者：Haijun  ; Yu ; Jihuai  ; Wu  ; ;   ; ^{jhwu@hqu.edu.cn} ; Leqing  ; Fan ; Youzhen  ; Lin ; Kaiqing  ; Xu ; Ziying  ; Tang ; Cunxi  ; Cheng ; Shen  ; Tang ; Jianming  ; Lin ; Miaoliang  ; Huang ; Zhang  ; Lan
• 关键词：Supercapacitor ; Redox-mediated gel polymer electrolyte ; P-benzenediol ; Pseudocapacitance ; Electrical double layer capacitance
• 刊名：Journal of Power Sources
• 出版年：2012
• 出版时间：15 January 2012
• 年：2012
• 卷：198
• 期：Complete
• 页码：402-407
• 全文大小：781 K

文摘

A supercapacitor based on a novel redox-mediated gel polymer electrolyte (PVA¨CH₂SO₄¨CP¨Cbenzenediol) and activated carbon electrodes is assembled. The electrochemical properties of the supercapacitor are evaluated by cyclic voltammetry, galvanostatic charge¨Cdischarge, and electrochemical impedance spectroscopy techniques. It is found that the supercapacitor exhibits large specific capacitance (474.29 F g^?), high energy density (11.31 W h kg^?), and excellent cyclical stability. The good performance for the supercapacitor is due to the capacity-storage mechanism combination of the electrical double layer capacitance and Faradaic pseudocapacitance by p-benzenediol/p-benzoquinone in the electrolyte.