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Citation: Zhang Bao-Hong, Zhang Na. Research on Nanophase MnO₂ for Electrochemical Supercapacitor[J]. Acta Physico-Chimica Sinica, ;2003, 19(03): 286-288. doi: 10.3866/PKU.WHXB20030323 shu

Research on Nanophase MnO₂ for Electrochemical Supercapacitor

Zhang Bao-Hong ,
Zhang Na

1.
Department of Chemical Engineering, Harbin Engineering University,Harbin,　150001

Received Date: 29 July 2002
Available Online: 15 March 2003

The nanophase MnO2 was synthesized by solid-phase reaction as electrode material for electrochemical supercapacitor and the MnO2 electrode was tested by cyclic voltammetry(CV),electrochemical impedance spectrometry (EIS) and constant charge-discharge curves. The result shows that MnO2 electrode has od performance of faradic pseudocapacitance in 1mol•L－1 KOH between －0.1 and 0.6 V(vs Hg/H ). The electrode can provide a specific capacitance of 240.25 to 325.21 F•g－1 at different current densities. After 5000 cycles of constant charge-discharge the capacitance reduces no more than 10％.
- Supercapacitor;MnO₂ electrode;Electrode material;Specific capacitance;Cycle life
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Research on Nanophase MnO₂ for Electrochemical Supercapacitor