Controlled growth of nanostructured MnO2 on carbon nanotubes for high-performance electrochemical capacitors
Controlled growth of nanostructured MnO2 on carbon nanotubes for high-performance electrochemical capacitors
复制标题
用于高性能电化学电容器的碳纳米管上纳米结构 MnO2 的受控生长
DOI：
10.1016/j.electacta.2014.11.162
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发表时间：
2015-01-10
影响因子：
6.6
通讯作者：
Wang, Xin
中科院分区：
文献类型：
--
作者：
Huang, Huajie;Zhang, Wenyao;Wang, Xin
过渡金属氧化物与碳材料的合理组合被认为是获得下一代电化学电容器电极材料的有效途径。在这里，我们展示了一个简单的合成纳米结构的二氧化锰支持在碳纳米管（CNT）通过直接氧化还原路线。通过改变反应时间，可以方便地控制MnO 2的生长密度以及CNTs的结构完整性，从而赋予新型杂化材料可调的电化学性能。因此，所得到的MnO 2-CNT电极表现出247.9 F g（-1）的最大比电容，具有良好的倍率性能和非凡的循环寿命稳定性（5000次循环后初始电容保持率为92.8%），表明这种材料在构建高性能储能系统方面具有巨大的潜力。(C)2014爱思唯尔有限公司版权所有。
The rational combination of transition metal oxides and carbon materials has been regarded as an efficient way of accessing the next-generation electrode materials for electrochemical capacitors. Here we demonstrate a facile synthesis of nanostructured MnO2 supported on carbon nanotubes (CNTs) via a direct redox route. By varying the reaction time, it can be convenient to control the growth density of MnO2 as well as the structural integrity of CNTs, which endow the novel hybrids with adjustable electrochemical performance. As a consequence, the resulting MnO2-CNT electrodes exhibit a maximum specific capacitance of 247.9 F g(-1), with good rate capability and extraordinary cycling life stability (92.8% retention of initial capacitance after 5000 cycles), suggesting such materials have great potential in constructing high-performance energy-storage systems. (C) 2014 Elsevier Ltd. All rights reserved.