高等学校化学学报

高等学校化学学报

• 研究论文 • 上一篇    下一篇

MgNi2添加对AB5型储氢合金电化学性能的影响

焦丽芳, 刘强, 袁华堂, 王一菁, 冯艳   

  1. 南开大学新能源材料研究所, 天津 300071
  • 收稿日期:2006-02-22 修回日期:1900-01-01 出版日期:2007-02-10 发布日期:2007-02-10
  • 通讯作者: 袁华堂

Effect of Adding MgNi2 on Electro-chemical Performance of AB5-type Hydrogen Storage Alloys

JIAO Li-Fang, LIU Qiang, YUAN Hua-Tang, WANG Yi-Jing, FENG Yan   

  1. Institute of New Energy Material Chemistry, Nankai University, Tianjin 300071, China
  • Received:2006-02-22 Revised:1900-01-01 Online:2007-02-10 Published:2007-02-10
  • Contact: YUAN Hua-Tang

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摘要： 制得了含Mg的AB5型稀土合金, 研究了合金添加Mg后合金电化学性能的变化. 采用ICP, XRD对合金组成和结构进行分析, 并通过EIS、CV、SEM和阳极极化曲线研究了电化学反应机理.

关键词: MgNi2, 储氢合金, 电化学性能

Abstract: A small amount of MgNi2 was melted with AB5 alloys which were analyzed by ICP, XRD and SEM. EIS, CV, cyclic anodic polarization curves and charge/discharge measurements were carried out to study the electrochemical properties of alloy B and mechanism of hydrogen storage. The experimental results show that the battery with alloy B as MH electrode shows higher and wider voltage platform, better high-rate charge/discharge capability and stability compared to alloy A as MH electrode. The electrochemical investigation strongly indicates that the improved characteristics are the result of the increased electrochemical catalytic activity due to the increment of the conductive surface area, the reduction of the contact resistance between alloy particles and the increased corrosion resistance of alloys.

Key words: MgNi2, Hydrogen alloy, Electrochemical performance

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