摘要
为了进一步降低AB5型混合稀土系贮氢合金的成本,采用Cr,Si,Cu替代Co和调节化学计量比的方法制备低钴AB5型贮氢合金。结果表明:3种取代元素在寿命方面的效果依次为Si>Cr>Cu,在放电容量和活化性能方面依次是Cu>Cr>Si。Cr,Cu,Si只有少量的替代才可能发挥其有利影响;通过非化学计量比的调节,低钴混合稀土系贮氢电极合金的放电容量、活化性能及倍率放电能力都能较好地达到实用要求,但是循环寿命有待提高。
In order to reduce cost of rare earthbased AB5type hydrogen storage alloy, the replacement of Cr,Si,Cu for Co and control of the stoichiometric proportion of alloy were used to prepare AB5type hydrogen storage alloy with low Co content. The results show that the substituent effect of Cu, Cr, Si for Co in circle life is Si>Cr>Cu, and in discharge capacity and active property is Cu>Cr>Si. Only a small quantity of Cu,Cr,Si is favorable. The discharge capacity, activation and rate discharge of these low Co content alloys have reached requirement in the Ni/MH battery application through control of stoichiomotry, but the cycle life is not improved by this proeedure.
出处
《中国稀土学报》
CAS
CSCD
北大核心
2003年第1期61-65,共5页
Journal of the Chinese Society of Rare Earths
基金
国家自然科学基金资助项目(50071050)
国家自然科学重点基金资助项目(50131040)
关键词
储能技术
贮氢电极合金
非化学计量比
电化学性能
低钴合金
稀土
energy storage technology
electrode hydrogen storage alloys
non-stoichiometric
electrochemical property
low Co content alloy
rare earths
