【作者】 邓超； 史鹏飞； 曾佳；

【Author】 DENG Chao, SHI Peng-fei, ZENG Jia (Department of Applied Chemistry, Harbin Institure of Technology, Harbin 150001, China)

【机构】 哈尔滨工业大学应用化学系；

【摘要】 探索了一种储氢合金表面修饰的新方法,应用HF和CuSO4混合溶液对MH/Ni电池负极AB,型储氢合金进行表面处理.研究了HF含量对合金表面修饰的影响,考察了修饰后合金电极的电化学性能,应用交流阻抗分析了表面处理对合金性能影响的作用机理.结果表明,表面修饰使合金表面活性增加,导电性增强,使合金电极具有更好的活化速度和高倍率放电能力.另外,表面修饰还抑制了合金的粉化、氧化,改善了合金电极的循环性能.因此,表面修饰合金作为MH/Ni电池负极材料可以更好的满足电动丰用动力型电源的性能要求.更多还原

【Abstract】 A new method of surface modification on hydrogen storage alloy is presented. The AB5 alloy of metal hydride electrode in Ni/MH battery is treated with mix solution of HF and CuSO4. The effect of the mount of HF on the performances of modified alloy is studied Sand the electrochemical properties of the alloy are investigated. Moreover, the EIS testing is carried out on modified alloy to analyze the mechanism of surface treatment. Testing results show that the modified alloy has better activation behavior and conductivity, which leading faster activation speed and excellent large current discharge ability. In the meanwhile, the surface modification prevents the oxidation and cracks of alloy, and greatly increases its cycle property. Thus the modified alloy as active material of metal hydride electrode could well satisfy the requirement of the application as power sources on electric vehicles.更多还原