| 不同晶型MnO2超级电容器电极材料的电化学特性 |
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| 引用本文： | 黄廷立,叶志国,彭新元,胡生双,华小珍,周贤良,袁学滔.不同晶型MnO2超级电容器电极材料的电化学特性[J].机械工程材料,2012(4):67-70. |
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| 作者姓名： | 黄廷立 叶志国 彭新元 胡生双 华小珍 周贤良 袁学滔 |
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| 作者单位： | 南昌航空大学;北京有色金属研究总院 |
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| 基金项目： | 国家自然科学基金资助项目(50901041);航空基金资助项目(2009ZF56017);江西省自然科学基金资助项目(2010GQH0114) |
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| 摘 要： | 用不同晶型的MnO2粉体制备了β-MnO2和γ-MnO2电极,用循环伏安和恒流充放电试验研究了上述两种电极的电化学特性。结果表明:β-MnO2和γ-MnO2电极都具有良好的电容性能,但后者具有更为良好的倍率放电性能,适合大电流充放电;在300mA.g-1的电流密度下,经5 000个循环充放电之后,β-MnO2电极已失效,而γ-MnO2电极的容量保持率还高达89.2%。
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| 关 键 词： | 超级电容器 MnO2 电化学特性 电极 |
Electrochemical Properties of Supercapacitor Electrode Materials Prepared by MnO2 with Different Crystal Forms |
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| HUANG Ting-li,YE Zhi-guo,PENG Xin-yuan,HU Sheng-shuang,HUA Xiao-zhen,ZHOU Xian-liang,YUAN Xue-tao.Electrochemical Properties of Supercapacitor Electrode Materials Prepared by MnO2 with Different Crystal Forms[J].Materials For Mechanical Engineering,2012(4):67-70. |
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| Authors: | HUANG Ting-li YE Zhi-guo PENG Xin-yuan HU Sheng-shuang HUA Xiao-zhen ZHOU Xian-liang YUAN Xue-tao |
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| Affiliation: | 1.Nanchang Hangkong University,Nanchang 310063,China;2.General Research Institute for Nonferrous Metals,Beijing 100088,China) |
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| Abstract: | The β-typed and γ-typed electrodes were prepared by MnO2 powders with different crystal forms,and the electrochemical properties of the above-mentioned electrodes were studied by cyclic voltammetry method and constant-current charge and discharge test.The results show that both the β-typed and γ-typed electrodes had good capacitance property,and the γ-MnO2 electrode had better rate discharge property and was more suitable for charge-discharge of larger current.Under the condition of the current density of 300 mA·g-1,the β-MnO2 electrode became invalid but the capacitance retention of γ-MnO2 electrode was still as high as 89.2% after circulatory charge-discharge 5 000 cycles. |
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| Keywords: | supercapacitor manganese dioxide electrochemical property electrode |
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