| 球磨包覆镍对A2B7型合金电极电化学性能影响的研究 |
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| 引用本文： | 田晓光,周东辉. 球磨包覆镍对A2B7型合金电极电化学性能影响的研究[J]. 表面技术, 2010, 39(6): 18-21. DOI: 10.3969/j.issn.1001-3660.2010.06.006 |
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| 作者姓名： | 田晓光 周东辉 |
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| 作者单位： | 郑州交通职业学院,郑州,450062;郑州日产汽车有限公司,郑州,450016 |
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| 摘 要： | 为进一步改善A2B7型贮氢合金电极的电化学性能,以La0.75Mg0.25Ni3.44Al0.06为研究对象,用未包覆合金粉末和球磨包覆镍处理不同时间的合金粉末制备合金电极,研究了合金电极的电化学性能和动力学性能.结果表明:合金粉末经球磨包覆镍处理后制得的合金电极,其活化性能及循环稳定性有所提高;球磨包覆镍处理可提高合金电极的交换电流密度J0,改善其电催化活性,降低电化学阻抗,加快电荷迁移速率,从而提高合金电极的高倍率放电能力.
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| 关 键 词： | A2B7型贮氢合金 合金电极 球磨包覆镍 电化学性能 |
| 收稿时间： | 2010-07-01 |
| 修稿时间： | 2010-12-10 |
Effect of Ball Milling by Nickel on Electrochemical Properties of A2B7Type Alloy |
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| TIAN Xiao-guang and ZHOU Dong-hui. Effect of Ball Milling by Nickel on Electrochemical Properties of A2B7Type Alloy[J]. Surface Technology, 2010, 39(6): 18-21. DOI: 10.3969/j.issn.1001-3660.2010.06.006 |
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| Authors: | TIAN Xiao-guang and ZHOU Dong-hui |
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| Affiliation: | Zhengzhou Transportation Vocational College, Zhengzhou 450062, China and Zhengzhou Nissan Automobile Co, Ltd, Zhengzhou 450016, China |
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| Abstract: | In order to improve the electrochemical performances of A2B7type hydrogen storage alloy, the effects of bare power and ball milling by nickel on the electrochemical properties of La0.75Mg0.25Ni3.44Al0.06hydrogen storage alloy electrode in different time were systemically explored. The electrochemical properity and dymamics properity of alloy electrode were studied. The result shows that the activation and cycling stability of the ball milling by nickel alloy electrode has incresement; That ball milling by nickel alloys can increase exchange current density J0and electrocatalytic activity, reduce electrochemical reaction resistance,enhance diffusivity of the charge in powder surface, so successfully improve the high-rate discharge performance of the coated electrode. |
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| Keywords: | A2B7type hydrogen storage alloy alloy electrode ball milling by nickel electrochemical properties |
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