| Mg58Al42储氢合金的制备及其电化学性能 |
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| 引用本文： | 张 辉,王 婷,曹中秋,张国英.Mg58Al42储氢合金的制备及其电化学性能[J].稀有金属材料与工程,2009,38(3):536-540. |
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| 作者姓名： | 张 辉 王 婷 曹中秋 张国英 |
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| 作者单位： | 沈阳师范大学,辽宁,沈阳,110034 |
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| 基金项目： | 国家高技术研究发展计划(863计划)，国家自然科学基金，辽宁省自然科学基金 |
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| 摘 要： | 采用机械合金化技术制备了Mg58Al42储氢合金并借助于X射线衍射仪、PARM273A和M5210电化学综合测试仪研究了其在不同球磨时间下的物相结构以及放电容量和耐腐蚀等电化学性能. 结果表明:合金粉末经高能球磨后产生了Mg17Al12新相,随着球磨时间的增加,衍射峰的相对强度下降,衍射峰变宽,合金的平均晶粒尺寸降低,内应力增大.合金的放电容量随球磨时间的延长先增加而后则降低,其中球磨20 h时,放电容量最大.合金的动电位极化曲线出现了钝化现象,合金腐蚀电流密度随球磨时间的延长先增大而后降低.合金的交流阻抗谱均由单容抗弧组成,电极反应受合金/电解质溶液界面的电荷迁移所控制.
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| 关 键 词： | 镁基储氢合金 电化学性能 交流阻抗谱(EIS) |
| 收稿时间： | 2008/2/15 0:00:00 |
Preparation and Electrochemical Properties of Mg58Al42 Hydrogen Storage Alloy |
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| Zhang Hui,Wang Ting,Cao Zhongqiu and Zhang Guoying.Preparation and Electrochemical Properties of Mg58Al42 Hydrogen Storage Alloy[J].Rare Metal Materials and Engineering,2009,38(3):536-540. |
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| Authors: | Zhang Hui Wang Ting Cao Zhongqiu and Zhang Guoying |
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| Affiliation: | Shenyang Normal University;Shenyang 110034;China |
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| Abstract: | Mg58Al42 hydrogen storage alloy was prepared by mechanical alloying (MA) method and its microstructural characteristics and electrochemical properties such as discharge capacities and corrosion mechanisms were investigated by XRD, PARM273A and M5210 electrochemical apparatus. The results show that the X-ray diffraction peaks have a deviation and broadening with increment of ball milling time because of fine grain size and internal stress. The discharge capacities of the present alloy increase at the beginni... |
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| Keywords: | Mg-based hydrogen storage alloy electrochemical properties electrochemical impedance spectroscopy(EIS) |
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