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研究论文

MnO_2/C复合材料的电化学电容特性研究

  • 高军 ,
  • 黄行康
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  • 厦门大学化学系,厦门大学化学系,厦门大学化学系 福建厦门361005,福建厦门361005,福建厦门361005

收稿日期: 2007-08-28

  修回日期: 2007-08-28

  网络出版日期: 2007-08-28

Electrochemical Capacitance Characteristics for MnO_2/C Composite

  • GAO Jun ,
  • HUANG Xing-kang
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  • (Department of Chemistry,Xiamen University,Xiamen 361005,Fujian,China

Received date: 2007-08-28

  Revised date: 2007-08-28

  Online published: 2007-08-28

摘要

应用乙炔黑直接还原高锰酸钾制备MnO2/C复合材料.样品结构及性能由XRD和SEM表征.研究了MnO2/C电极(正极)在不同电解液中的法拉第"准电容行为",及其循环伏安、交流阻抗与恒电流充放电等性能.实验表明,MnO2/C复合材料具有良好的电化学电容特性.在1 mol/L的KOH电解液中和电流密度为5 mA/cm2下,MnO2/C复合材料的比电容量可达258 F/g,并表现出良好的循环性能.

本文引用格式

高军 , 黄行康 . MnO_2/C复合材料的电化学电容特性研究[J]. 电化学, 2007 , 13(3) : 279 -283 . DOI: 10.61558/2993-074X.1822

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.

参考文献

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