| The Composite Effect of Nanometer MnO2 Mixed with the Electrolytic MnO2 |
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| 作者姓名： | 杨超 刘卓钦 田熙科 皮振邦 王圣平 |
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| 作者单位： | Faculty of Material Science and Chemical Engineering, China University of Geosciences, Wuhan 430074, China |
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| 基金项目： | 湖北省武汉市青年科技晨光计划 |
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| 摘 要： | The nanometer MnO2 has outstanding electrochemical performance theoretically, but it is not suitable for actual utilization, which may result in capacity decrease and resource waste. In this study we have utilized the characterizations of the nanometer material, synthesized a type of nanometer α-MnO2 through KMnO4 and KNO3 with hydrothermal method, and mixed the products into micron electrolytic manganese dioxide （EMD） to enhance the electrochemical performance of the electrode.The cyclic voltammogram and galvanostatical discharge measurements of the samples were investigated. It is found that the 50﹪ nanometer MnO2 mixed electrode has the best electrochemical performance. The electrochemical performance improvement mechanism of the sample nanometer MnO2 mixed into micron EMD was discussed. With the existence of electrolyte, the nanometer MnO2 particles filled into the interspaces of the micron EMD particles, the mass and charge transfer conditions of the electrode reaction were improved, and the electrode polarization was diminished.
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| 关 键 词： | 纳米氧化锰 电化学性能 电解 合成 |
| 收稿时间： | 22 January 2007 |
| 修稿时间： | 2007-01-222007-03-20 |
The Composite Effect of Nanometer MnO2 Mixed with the Electrolytic MnO2 |
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| Yang Chao,Liu Zhuoqin,Tian Xike,Pi Zhenbang,Wang Shengping.The Composite Effect of Nanometer MnO2 Mixed with the Electrolytic MnO2[J].Journal of China University of Geosciences,2007,18(2):172-176. |
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| Authors: | Yang Chao Liu Zhuoqin Tian Xike Pi Zhenbang Wang Shengping |
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| Institution: | Faculty of Material Science and Chemical Engineering, China University of Geosciences, Wuhan 430074, China |
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| Abstract: | The nanometer MnO2 has outstanding electrochemical performance theoretically, but it is not suitable for actual utilization, which may result in capacity decrease and resource waste. In this study we have utilized the characterizations of the nanometer material, synthesized a type of nanometer α-MnO2 through KMnO4 and KNO3 with hydrothermal method, and mixed the products into micron electrolytic manganese dioxide (EMD) to enhance the electrochemical performance of the electrode.The cyclic voltammogram and galvanostatical discharge measurements of the samples were investigated. It is found that the 50% nanometer MnO2 mixed electrode has the best electrochemical performance. The electrochemical performance improvement mechanism of the sample nanometer MnO2 mixed into micron EMD was discussed. With the existence of electrolyte, the nanometer MnO2 particles filled into the interspaces of the micron EMD particles, the mass and charge transfer conditions of the electrode reaction were improved, and the electrode polarization was diminished. |
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| Keywords: | nanometer MnO2 EMD composite effect |
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