材料科学
电化学
电容
原位
超级电容器
化学工程
纳米技术
电极
有机化学
化学
工程类
物理化学
作者
Yuan Wang,Zheng Chang,Zhichao Zhang,Jie Lin,Meng Qian,Peng Wang,Tianquan Lin,Fuqiang Huang
标识
DOI:10.1021/acsami.8b19071
摘要
A facile approach of in situ electrochemical oxidation has been utilized to modify carbons, including activated carbon, mesoporous few-layer carbon, graphite, carbon fiber, and carbon nanotube, which induces oxygen-containing functional groups on its surface and simultaneously enhances its wettability, contributing to the improvement of capacitance. By this approach, the capacitance of commercialized activated carbon is increased by 86% in an acidic electrolyte, reaching 320 F g-1, of which more than 96% was maintained after 10 000 cyclic tests. The huge improvement stems from electrochemical redox reactions enabled by oxygen-associated groups, which do not adversely affect the porous structure and electrical conductivity. Such improvement will put carbon-based electrochemical capacitors into more practical application areas.
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