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张国芳，许剑轶，殷兆迁，张胤
(内蒙古科技大学稀土学院，内蒙古包头014010)
关键词:La － Mg － Ni 合金;Si 含量;电化学性能;循环稳定性
中图分类号:TG139． 7 文献标识码:A
摘要:采用中频感应炉熔炼制备铸态La0.75Mg0.25Ni3.1－ xCo0.3Al0.1 Six(x = 0.00 ～ 0.2)合金，通过调控Si 的成分，研究Si 元素替代Ni 对合金电化学性能的影响． 研究表明，随着Si 替代量增加，合金活化性能基本不变，最大电化学放电容量随Si 含量的增加呈线性下降的关系，电化学放电平台压力逐渐降低，电化学循环稳定性得到有效提高．
Ｒesearch on the electrochemical properties of La0.75 Mg0.25 Ni3.1 － x Co0.3 Al0.1 Six(x =0.00 ～0.20)hydrogen storage alloys
ZHANG Guo-fang，XV Jian-yi，YIN Zhao-qian，ZHANG Yin
(Ｒare Earth School，Inner Mongolia University of Science and Technology，Baotou 014010，China)
Key words:La-Mg-Ni alloy; Si content; electrochemical property; cycle atability
Abstract:As-cast La0.75Mg0.25Ni3.1 － xCo0.3 Al0.1 Six(x = 0． 00 ～ 0． 20)alloys were synthesized via intermediate frequency induction melting Method.The influences of substitute Si for Ni on the electrochemical properties were detected by controlling the Si content.It was showed that there were no differences of the activated properties with different Si contents.By increasing Si content，the maximum discharge capacity was decreased linearly，the discharge voltage plateau became lowered，and the cycle stability was improved effectively．