材料科学
聚苯胺
超级电容器
电极
集电器
电容
复合材料
电化学
石墨
导电体
水平扫描速率
电容感应
纳米技术
循环伏安法
电解质
聚合物
电气工程
工程类
物理化学
化学
聚合
作者
Guangli Li,Mengyao Ren,Haihan Zhou
标识
DOI:10.1016/j.surfin.2022.101874
摘要
In this work, a facile and scalable mechanically exfoliated method is put forward to fabricate roughened graphite sheet (RGS) current collector with a unique layered microstructure. And meanwhile, the electropolymerization parameter-dependent supercapacitive performance of the polyaniline (PANI) films as electroactive material is investigated in detail. Electrochemical measurements indicate that the electrochemical performances of PANI are notably improved through using optimized electropolymerization parameters, which can be attributed to the dispersed morphology and increased roughness for the obtained PANI films. More importantly, the capacitive behaviors of PANI electrodes are further observably boosted through using RGS current collector compared to GS. This can be ascribed to the 3D interface established between PANI films and RGS current collector. A symmetrical supercapacitor device is constructed by the resulting RGS/PANI electrodes. This device delivers 212.6 mF cm−2 of areal capacitance and high rate performance. Even more impressively, it retains 84.8% and 95.3% of initial capacitance after 4000 charge-discharge cycles and harsh mechanical deformation for 400 times, respectively.
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