A novel redox-mediated gel polymer electrolyte for high-performance supercapacitor
A novel redox-mediated gel polymer electrolyte for high-performance supercapacitor
复制标题
用于高性能超级电容器的新型氧化还原介导的凝胶聚合物电解质
DOI：
10.1016/j.jpowsour.2011.09.110
复制
发表时间：
2012-01-15
影响因子：
9.2
通讯作者：
Lan, Zhang
中科院分区：
文献类型：
--
作者：
Yu, Haijun;Wu, Jihuai;Lan, Zhang
基于新型氧化还原介导型凝胶聚合物电解质(PVA-H_2SO_4-对苯二酚)和活性碳电极组装了一种超级电容器。采用循环伏安法、恒电流充放电和交流阻抗谱技术对超级电容器的电化学性质进行了表征。结果表明，该超级电容器具有较大的比电容(474.29 Fg~(-1))、较高的能量密度(11.31W·h·kg~(-1))和良好的循环稳定性。这种超级电容器的良好性能归功于电解液中对苯二酚/对苯二酚的双电层电容和法拉第伪电容的储电机理相结合。(C)2011爱思唯尔B.V.保留所有权利。
A supercapacitor based on a novel redox-mediated gel polymer electrolyte (PVA-H2SO4-P-benzenediol) and activated carbon electrodes is assembled. The electrochemical properties of the supercapacitor are evaluated by cyclic voltammetry, galvanostatic charge-discharge, and electrochemical impedance spectroscopy techniques. It is found that the supercapacitor exhibits large specific capacitance (474.29 F g(-1)), high energy density (11.31 W h kg(-1)), 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. (C) 2011 Elsevier B.V. All rights reserved.