| MnO2/C复合材料的电化学电容特性研究 |
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| 引用本文： | 高军,黄行康,杨勇.MnO2/C复合材料的电化学电容特性研究[J].电化学,2007,13(3):279-283. |
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| 作者姓名： | 高军 黄行康 杨勇 |
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| 作者单位： | 厦门大学化学系,福建,厦门,361005 |
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| 基金项目： | 国家自然科学基金(项目编号:90606015)，福建省科技计划(2006H0089)课题资助 |
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| 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.
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| 关 键 词： | 电化学电容 MnO2/C复合材料 比电容 |
| 文章编号： | 1006-3471（2007）03-0279-05 |
| 收稿时间： | 2007-06-10 |
| 修稿时间： | 2007-07-03 |
Electrochemical Capacitance Characteristics for MnO2/C Composite |
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| GAO Jun,HUANG Xing-kang,YANG Yong.Electrochemical Capacitance Characteristics for MnO2/C Composite[J].Electrochemistry,2007,13(3):279-283. |
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| Authors: | GAO Jun HUANG Xing-kang YANG Yong |
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| Affiliation: | Department of Chemistry, Xiamen University, Xiamen 361005, Fufian, China |
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| 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. |
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| Keywords: | electrochemical capacitor MnO2/C composite specific capacitance |
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