Fabrication of TiO2@MnO2 nanotube arrays by pulsed electrodeposition and their application for high-performance supercapacitors
Fabrication of TiO2@MnO2 nanotube arrays by pulsed electrodeposition and their application for high-performance supercapacitors
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DOI：
10.1016/j.electacta.2016.01.182
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发表时间：
2016-02
影响因子：
6.6
通讯作者：
He Zhou;Xiaopeng Zou;Yanrong Zhang
中科院分区：
文献类型：
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作者：
He Zhou;Xiaopeng Zou;Yanrong Zhang
通过脉冲电沉积技术完成了TiO2@MnO2纳米管阵列（NTA）结构的制备。这种结构的成功制备是由于所使用的高电流脉冲，这在整个TiO 2纳米管层的壁上产生了足够的成核趋势，导致MnO 2沿着纳米管壁连续沉积。合成的TiO2@MnO2NTAs样品表现出优异的电化学行为，具有425.0 F g− 1的高比电容和150.9 mF cm−2的面电容，在MnO 2-TiO 2复合材料中达到了最高水平。此外，使用两条TiO2@MnO2NTAs电极组装对称的超级电容器装置，其产生高达7.4Wh kg-1的能量密度，比对称MnO 2//MnO 2超级电容器报道的大多数值高得多。TiO2@MnO2NTAs样品的显著电化学性能使其成为构建高性能超级电容器的有吸引力的候选者。
The fabrication of TiO2@MnO2nanotube arrays (NTAs) structure is accomplished via a pulsed electrodeposition technique. The successful preparation of this structure is owing to the high current pulse used, which creates a sufficient nucleation trend on the wall of the entire TiO2nanotube layer, that results in the continuous deposition of MnO2along the nanotube walls. The synthesized TiO2@MnO2NTAs sample is found to exhibit excellent electrochemical behavior with high specific capacitance of 425.0 F g−1and areal capacitance of 150.9 mF cm−2, ranking in the top level ever achieved by a MnO2-TiO2composite. Furthermore, a symmetric supercapacitor device is assembled using two strips of the TiO2@MnO2NTAs electrode that yielded energy density as high as 7.4 Wh kg−1, a much higher value than most of the values reported for symmetric MnO2//MnO2supercapacitors. The remarkable electrochemical properties of the TiO2@MnO2NTAs sample make it an attractive candidate for the application of constructing high-performance supercapacitors.