摘要
以活性碳布为基底并依次负载MnO2、碳纳米管和聚苯胺,制备了一种高性能、自支撑的超级电容器电极。研究了电极组成、微观形貌等因素对电极电学和电化学性能的影响。结果表明:活性碳纤维、MnO2和聚苯胺作为电化学活性物质能够均匀地分散于电极内部,碳纤维和碳纳米管则作为导电网络;该电极质量比电容可达193F/g(基于整个电极质量计算),显著高于纯活性碳布、活性碳布/MnO2复合电极以及先前报道的多种电极;同时该复合电极表现出优异的倍率性能和循环稳定性。可为优化电极结构以制备具有高储能密度的超级电容器提供新的借鉴。
High-performance free-standing composite electrodes for supercapacitors were constructed with activated carbon fiber cloth substrate loaded with MnO2,carbon nanotube and polyaniline.Composition,morphology and their effects on the electrochemical performance of the composite electrodes were well-studied.It turned out that the electrochemically active materials,including activated carbon fiber cloth,MnO2 and polyaniline were uniformly distributed inside the composite electrode.And the activated carbon fiber and carbon nanotube served as electrically conductive networks.The specific capacitance of the electrode can reach 193 F/g based on the total mass of the electrode,which was significantly higher than pure activated carbon cloth,activated carbon cloth/polyaniline composite electrode and many other composite electrodes.Besides,the composite electrode exhibited excellent rate capability and cyclic stability.This work proposed a facile method for the preparation of composite electrode and offered a new scope for optimizing the distribution of electrochemically active materials and electrode structure for high energy storage density supercapacitors.
作者
施萍萍
王金杰
任芝龙
陈萍
Shi Pingping;Wang Jinjie;Ren Zhilong;Chen Ping(Zhejiang Sci-Tech University,Hangzhou 310018;Graduate School at Shenzhen,Tsinghua University,Shenzhen 518055)
出处
《化工新型材料》
CAS
CSCD
北大核心
2020年第2期121-124,共4页
New Chemical Materials
