稀土(镁)系AB_2型贮氢合金的研究进展

Research Development of RE-(Mg)-System AB_2-type Hydrogen Storage Alloys

综述了稀土(镁)系AB2型贮氢合金的研究进展,分别从合金的晶体结构、气态贮氢性能及电化学性能等方面进行了总结,阐述了AB2与AB5及A7B16结构之间的关联性,并就此合金存在的问题加以评述,进一步探讨了改善该体系合金性能的方法。稀土(镁)系AB2型贮氢合金较AB5型和AB3型具有更高的理论贮氢容量,认为通过合理的制备工艺与机理研究能获得良好的电化学性能。

Based on the crystal structure, hydrogen storage behavior in gaseous state and electrochemical properties, a review is given on the research development of RE-（ Mg）-system APe-type hydrogen storage alloys. The structure correlation between AB2 and ABs or A7B16 is represented. Meanwhile, the present problems in the AB2-type alloys are commented and the methods how to improve properties of this kind of alloy are discussed. The RE-（Mg）- system AB2-type hydrogen storage alloys have higher theorical hydrogen storage capacity than AB6-type and AB3-type alloys. It is shown that favorable electrochemical properties can be obtained through the suitable preparation technology and mechanism study.