Effect of MnO₂ Content on Electrochemical Capacitance Behavior of Active Carbon Electrode

Authors

Kun SHEN, School of Material Science and Engineering, Nanchang Hangkong University, Nanchang 330063, China;Follow
Xian-liang ZHOU, School of Material Science and Engineering, Nanchang Hangkong University, Nanchang 330063, China;
Qi-shun DUAN, School of Material Science and Engineering, Nanchang Hangkong University, Nanchang 330063, China;

Corresponding Author

Kun SHEN(1353278219@qq.com)

Abstract

In this work, the manganese dioxide (MnO₂) materials were prepared by solution approach at low temperature, thermal decomposition and electrochemical deposition. The actived carbon (AC) and MnO₂ composite electrodes were used for aqueous supercapacitors. The morphologies and structures of the prepared materials were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM), and the electrochemical behaviors were tested by cyclic voltammetry (CV) and galanostatic charge-discharge tests. Electrochemical test data show that the maximum specific capacitances of 151, 172 and 141 F•g^-1 were obtained with the contents of MnO₂ being 70, 60 and 70% in the composites, respectively. However, the influence of MnO₂powder on the electrode impedance was not straightforward.

Graphical Abstract

Keywords

aqueous asymmetic super capacitor, manganese oxide, activated carbon electrode

DOI Link

https://doi.org/10.13208/j.electrochem.150721

Publication Date

2015-12-23

Online Available Date

2015-12-23

Recommended Citation

Kun SHEN, Xian-liang ZHOU, Qi-shun DUAN. Effect of MnO₂ Content on Electrochemical Capacitance Behavior of Active Carbon Electrode[J]. Journal of Electrochemistry, 2015 , 21(6): 577-582.
DOI: 10.13208/j.electrochem.150721
Available at: https://jelectrochem.xmu.edu.cn/journal/vol21/iss6/9