| LaNi5型储氢合金表面修饰及其电化学性能研究 |
| Surface Modification and Property Study of LaNi5 Hydrogen Storage Alloy |
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| 摘要: |
| 关键词: MH/Ni电池 表面修饰 电化学性能 |
| 基金项目: |
| Abstract: This paper presents a new method of surface modification on LaNi5 hydrogen storage alloy. The hydrogen alloy was treated in the acid CuSO4 solution containing HF. The effect of HF on surface state of alloy was studied and the electrochemical properties of modified alloy were investigated. Electrochemical impedance spectra (EIS) was also applied to analyze the resistance property of alloy electrode after modification. SEM and XRD results showed that HF had corrosive effect on hydrogen alloy, which help copper grain to precipitate on alloy surface. EIS analysis showed that modified alloy had lower contact resistance and electrochemical polarization, which resulted in a higher conductivity and electrochemical activation. Electrochemical testing showed modified alloy had better activation behavior and excellent large current discharge ability. Thus it could well satisfy the requirement of the application as power sources on electric vehicles. |
| Keywords: nickel metal hydride battery surface modification electrochemical property |
| 投稿时间：2004-07-12 修订日期：2004-11-02 |
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| 邓超,史鹏飞,张森,曾佳.LaNi5型储氢合金表面修饰及其电化学性能研究[J].无机化学学报,2005,21(3):446-450. |
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