Molten Salt Treatment of MnO_2 and Investigation on Supercapacitor Properties

Authors

Ye CHEN, College of Materials Science and Chemical Engineering,Harbin Engineering University,Harbin 150001,China;
Zun-bo ZHANG, College of Materials Science and Chemical Engineering,Harbin Engineering University,Harbin 150001,China;
Wei ZHANG, College of Materials Science and Chemical Engineering,Harbin Engineering University,Harbin 150001,China;
Liang LIU, College of Materials Science and Chemical Engineering,Harbin Engineering University,Harbin 150001,China;
Zhi-min LIU, College of Materials Science and Chemical Engineering,Harbin Engineering University,Harbin 150001,China;

Abstract

The MnO2 prepared by solid phase method is treated by KCl-NaCl-LiCl molten salt system.The XRD patterns indicated that the crystal structures of MnO2 sample have had the α-MnO2 and γ-MnO2 phase,the crystallinity of sample is increased after treated by molten salt.The electrochemical properties were tested by cyclic voltammetry,constant current charge/discharge and AC impedance.The result shows that the supercapacitor performance of the treated material has improved.The specific discharge capacitance of the treated sample are 129.07 F·g-1,increased by 27.88% compared to 100.94 F·g-1 of untreated sample.Long cycle life and high coulombic efficiency were also demonstrated after charge/discharge 100 cycles.The value of RESR and RE are 0.28 Ω and 0.54 Ω respectively after treated.

Keywords

supercapacitor, molten salt, MnO2, cyclic voltammograms, constant current charge/discharge, AC impedance

DOI Link

https://doi.org/10.61558/2993-074X.1861

Publication Date

2008-02-28

Online Available Date

2008-02-28

Revised Date

2008-02-28

Received Date

2008-02-28

Recommended Citation

Ye CHEN, Zun-bo ZHANG, Wei ZHANG, Liang LIU, Zhi-min LIU. Molten Salt Treatment of MnO_2 and Investigation on Supercapacitor Properties[J]. Journal of Electrochemistry, 2008 , 14(1): 46-50.
DOI: 10.61558/2993-074X.1861
Available at: https://jelectrochem.xmu.edu.cn/journal/vol14/iss1/10

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