Effects of Fe-substitution for cobalt on electrochemical properties of La-Mg-Ni-based alloys  

作　　者：蒿建生 韩树民 李媛 扈琳 张静武 

机构地区：[1]State Key Laboratory of Metastable Materials Science and Technology,Yanshan University [2]Department of Environmental and Chemical Engineering,Yanshan University

出　　处：《Journal of Rare Earths》2010年第2期290-294,共5页稀土学报（英文版）

基　　金：supported by the National Natural Science Foundation of China (20673093);the Natural Science Foundation of Hebei Province (B2007000303);Support Program for Hundred Excellent Innovation Talents from the Universities and Colleges of Hebei Province

摘　　要：In order to improve electrochemical properties,especially cycling stability,Co was partially substituted by Fe in A2B7-type La-Mg-Ni-based alloys.The La0.74Mg0.26Ni2.55Co0.65-xFex(x=0,0.10,0.20,0.30) alloys were prepared by inductive melting,and their phase structure and electrochemical properties were studied.The XRD and SEM results showed that the alloys consisted mainly of(La,Mg)2Ni7 phase,(La,Mg)5Ni19 phase and LaNi5 phase,except for absence of LaNi5 phase in the non-substituted alloy.The(La,Mg)5Ni19 ph...In order to improve electrochemical properties,especially cycling stability,Co was partially substituted by Fe in A2B7-type La-Mg-Ni-based alloys.The La0.74Mg0.26Ni2.55Co0.65-xFex(x=0,0.10,0.20,0.30) alloys were prepared by inductive melting,and their phase structure and electrochemical properties were studied.The XRD and SEM results showed that the alloys consisted mainly of(La,Mg)2Ni7 phase,(La,Mg)5Ni19 phase and LaNi5 phase,except for absence of LaNi5 phase in the non-substituted alloy.The(La,Mg)5Ni19 ph...

关 键 词：hydrogen storage alloys elemental substitution electrochemical properties phase structure rare earths 

分 类 号：TG146[一般工业技术—材料科学与工程]