Preparation and Electrochemical Performance of Ultra-long MnOOH Nanowires

被引：0
|
作者：
Cheng X. [1 ]
Huang L. [1 ]
Hu K. [1 ]
Chen H. [1 ]
机构：
[1] School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou
来源：
Kuei Suan Jen Hsueh Pao/Journal of the Chinese Ceramic Society | 2020年 / 48卷 / 11期
关键词：
Electrochemical performance; Hydrothermal method; Manganese oxyhydroxide; Supercapacitor;
D O I：
10.14062/j.issn.0454-5648.20200001
中图分类号：
学科分类号：
摘要：
Ultra-long MnOOH nanowire was prepared by a simple hydrothermal process using KMnO4 and ammonium acetate without additional template agents. MnOOH sample was characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, thermogravimetric analysis, amperometry, constant current charge/discharge characterization and electrochemical impedance spectroscopy. The results show that the length of MnOOH nanowires is more than 10 μm, and the diameter is approximately 20 nm. The specific capacitance is 285 F/g at current density of 1 A/g in 1.0 mol/L Na2SO4 electrolyte, and it can still keep a good cycling stability after 4 000 cycles. The post-capacitance retention rate reaches 96.2%. The MnOOH nanowire as an electrode material has an excellent electron transmission channel, exhibiting a superior ultracapacitor performance, which can have broad application prospects as an electrode material for supercapacitors. © 2020, Editorial Department of Journal of the Chinese Ceramic Society. All right reserved.
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页码：1859 / 1864
页数：5
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