Electrochemical Capacitance Characteristics for MnO_2/C Composite

Authors

Jun GAO, Department of Chemistry,Xiamen University,Xiamen 361005,Fujian,China;
Xing-kang HUANG, Department of Chemistry,Xiamen University,Xiamen 361005,Fujian,China;
Yong YANG, Department of Chemistry,Xiamen University,Xiamen 361005,Fujian,China;

Corresponding Author

Jun GAO(yyang@xmu.edu.cn)

Abstract

The MnO2/C composite was synthesized by reduction of KMnO4 with acetylene black.The products were characterized by XRD and SEM.We used MnO2/C composite as the positive electrode material of the electrochemical capacitor.The performance of faradic psedocapacitance of the MnO2/C electrode was studied in different electrolytes.The MnO2/C electrode was tested by cyclic voltammetry,electrochemical impedance spectroscopy(EIS) and constant charge-discharge curves.The experimental results showed that the MnO2/C composite has excellent performance.The specific capacitance of the MnO2/C composite as 258 F/g is obtained at 5mA/cm2 current density in 1mol/L KOH solution.It exhibited high discharge capacity and good cycle performance.

Keywords

electrochemical capacitor, MnO2/C composite, specific capacitance

DOI Link

https://doi.org/10.61558/2993-074X.1822

Publication Date

2007-08-28

Online Available Date

2007-08-28

Revised Date

2007-08-28

Received Date

2007-08-28

Recommended Citation

Jun GAO, Xing-kang HUANG, Yong YANG. Electrochemical Capacitance Characteristics for MnO_2/C Composite[J]. Journal of Electrochemistry, 2007 , 13(3): 279-283.
DOI: 10.61558/2993-074X.1822
Available at: https://jelectrochem.xmu.edu.cn/journal/vol13/iss3/10