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
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
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