物理化学学报 >> 2003, Vol. 19 >> Issue (03): 286-288.doi: 10.3866/PKU.WHXB20030323

研究简报 上一篇    

纳米MnO2超级电容器的研究

张宝宏;张娜   

  1. 哈尔滨工程大学化学工程系，黑龙江 哈尔滨　150001
  • 收稿日期:2002-07-29 修回日期:2002-10-22 发布日期:2003-03-15
  • 通讯作者: 张宝宏 E-mail:zhangbaohong1031@sohu.com

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 E-mail:zhangbaohong1031@sohu.com

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摘要： 用固相合成法制备纳米MnO2，作为超级电容器材料，通过循环伏安、交流阻抗与恒电流充放电等测试手段对MnO2电极进行分析.结果表明,以1 mol•L－1 KOH为电解液， MnO2电极在－0.1～0.6 V(vs. Hg/HgO)的电压范围内具有良好的法拉第电容性能.在不同电流密度下，电极比容量达240.25到325.21 F•g－1.恒电流充放电5000次后，电极容量衰减不超过10％.

关键词: 超级电容器, MnO2电极, 电极材料, 比容量, 循环寿命

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