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研究了几种AB5非化学计量贮氢合金的电化学性能 ,及在低电流密度与高电流密度放电下取代元素对放电比容量、活化性能及循环寿命的影响。Sn ,Co,Mn的加入有利于提高合金的电化学贮氢容量 ,La(NiSn) 5.14 ,La(NiSnCo) 5.12 和La(NiSnMn) 5.12 具有相同的电化学贮氢容量与活化特性。尽管La(NiSn) 5.14 大电流放电性能优于La(NiSnCo) 5.12 和La(NiSnMn) 5.12 ,但其寿命短。Mn ,Co和Al可大大提高合金的使用寿命。La(NiSnCo) 5.12 被认为是一种理想的贮氢合金。
The electrochemical properties of several AB5 non-stoichiometric hydrogen storage alloys were studied, and the effects of the substituted elements on specific discharge capacity, activation performance and cycle life under low current density and high current density discharge were studied. The addition of Sn, Co and Mn is beneficial to increase the electrochemical hydrogen storage capacity of the alloy. La (NiSn) 5.14, La (NiSnCo) 5.12 and La (NiSnMn) 5.12 have the same electrochemical hydrogen storage capacity and activation characteristics. Although La (NiSn) 5.14 high-current discharge performance is superior to that of La (NiSnCo) 5.12 and La (NiSnMn) 5.12, its lifetime is short. Mn, Co and Al can greatly improve the service life of the alloy. La (NiSnCo) 5.12 is considered as an ideal hydrogen storage alloy.