材料科学
超级电容器
聚苯胺
电容
石墨烯
水平扫描速率
氧化物
电极
复合材料
苯胺
聚合物
化学工程
纳米技术
电化学
聚合
有机化学
循环伏安法
化学
物理化学
工程类
冶金
作者
Jian Yan,Liping Yang,Mengqi Cui,Weinan Xu,Kenji Jianzhi Chee,Viet Cuong Nguyen,Vipin Kumar,Afriyanti Sumboja,Ming Wang,Pooi See Lee
标识
DOI:10.1002/aenm.201400781
摘要
Polyaniline (PANI), a promising conducting polymer for supercapacitor, exhibits high specific capacitance and good rate capability. However, it suffers from low cycling stability due to the breakage or scission of polymer chains and loss of contact caused by the volume change during the charge–discharge, as well as the irreversible oxidation and reduction. Here, a strategy for using aniline tetramers loaded on graphene oxide (AT‐GO) is developed to prevent chain breaking and increase the tolerance of volume change. The potential window is also controlled to reduce the irreversible reactions. In a three electrode test, AT‐GO exhibits a good cycling stability with specific capacitance remaining more than 93 to 96% after 2000 cycles. In a two electrode test, the specific capacitance remains 97.7% of its initial specific capacitance after 2000 cycles by suppressing the side reactions. AT‐GO also shows a high specific capacitance of more than 769 F g −1 at 1 A g −1 and it remains 581 F g −1 at 60 A g −1 , suggesting a good rate capability. These results suggest that AT‐GO is a promising electrode material for practical applications.
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