Acta Phys. -Chim. Sin. ›› 2003, Vol. 19 ›› Issue (03): 286-288.doi: 10.3866/PKU.WHXB20030323

• Note • Previous Articles    

Research on Nanophase MnO2 for Electrochemical Supercapacitor

Zhang Bao-Hong;Zhang Na   

  1. Department of Chemical Engineering, Harbin Engineering University,Harbin, 150001
  • Received:2002-07-29 Revised:2002-10-22 Published:2003-03-15
  • Contact: Zhang Bao-Hong

Abstract: 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 good performance of faradic pseudocapacitance in 1mol•L-1 KOH between -0.1 and 0.6 V(vs Hg/HgO). 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%.

Key words: Supercapacitor, MnO2 electrode, Electrode material, Specific capacitance, Cycle life