聚吡咯
超级电容器
材料科学
石墨烯
电容
电极
纳米复合材料
复合材料
水平扫描速率
电解质
氧化物
电化学
聚合
化学工程
纳米技术
循环伏安法
聚合物
化学
物理化学
工程类
冶金
作者
Fang Zhang,Fei Xiao,Zehua Dong,Wei Shi
标识
DOI:10.1016/j.electacta.2013.09.153
摘要
Different mass ratios of polypyrrole (PPy) to graphene hydrogel (GH) nanocomposites were synthesized by hydrothermal reduction of graphene oxide and chemically oxidative polymerization of pyrrole, forming a three-dimensional framework of PPy wrapped on the surface of GH without adding any toxic reductive agents. Electrochemical tests show that PPy/GH15 nanocomposite exhibits unique electrochemcial properties, such as enhanced electrolytic permeability and high electric capacity. Thanks to the synergistic effect of the pseudo-capacitance of PPy and the electric double layer capacitance of GH, PPy/GH15 exhibits a high specific capacitance of 375 F g−1 at a scan rate of 10 mV s−1. In addition, the PPy/GH15 electrode shows good cycling stability, and its specific capacitance retention is 87% even after 4000 charge–discharge cycles in the potential window of −0.1 to 0.6 V, suggesting it an ideal electrode material for supercapacitor.
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