石墨烯
超级电容器
氧化物
电极
材料科学
氧化石墨
剥脱关节
纳米技术
聚苯胺
石墨
化学工程
氧化石墨烯纸
石墨烯纳米带
石墨烯泡沫
电解质
拉曼光谱
电化学
复合材料
聚合物
化学
冶金
物理化学
工程类
聚合
作者
Jie Tian,Sai Wu,Xianglu Yin,Wei Wu
标识
DOI:10.1016/j.apsusc.2019.143696
摘要
This work presents the preparation of hydrophilic graphene/graphene oxide nanosheets by liquid-shear-exfoliation using graphite oxide as an additive. And the as-prepared graphene/graphene oxide nanosheets are applied to the synthesis of the three-dimensional graphene/polyaniline composites that are applied as supercapacitor electrodes directly. A variety of influencing factors on the concentration of graphene/graphene oxide nanosheets are systematically explored, indicating that this method is easy to scale up. A series of characterizations prove that the graphene can be successfully exfoliated with the help of graphite oxide, and graphene can effectively combine with graphene oxide. The composites exhibit better electrochemical properties (gravimetric capacitance of 483 F g−1 at 1 A g−1) than materials built with the mixture of graphene, graphene oxide, and polyaniline as precursors. In addition, the symmetric supercapacitor which is assembled from the composites demonstrates a high energy density of 17.9 Wh kg−1 at a power density of 500 W kg−1. These results show that graphene/graphene oxide nanosheets have a good application in supercapacitors.
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