Structures and electrochemical performances of La_(0.75-x)Zr_xMg_(0.25)Ni_(3.2)Co_(0.2)Al_(0.1) (x=0-0.2) electrode alloys prepared by melt spinning

作     者：张羊换 赵栋梁 师颜春 祁焱 郭世海 王新林 

作者机构：Department of Functional Material ResearchCentral Iron and Steel Research Institute School of MaterialInner Mongolia University of Science and Technology 

出 版 物：《Transactions of Nonferrous Metals Society of China》 (中国有色金属学报（英文版）)

年 卷 期：2010年第20卷第4期

页      面：607-613页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：Project(2007AA03Z227)supported by High-tech Research and Development Program of China Projects(50871050,50701011)supported by the National Natural Science Foundation of China Project(200711020703)supported by the Natural Science Foundation of Inner Mongolia,China Project(NJzy08071)supported by High Education Science Research Project of Inner Mongolia,China 

主　　题：A2B7-type electrode alloy La-Mg-Ni alloy Ni-MH battery melt-spinning electrochemical performance 

摘      要：The La-Mg-Ni system A2B7-type electrode alloys with nominal composition La0.75-xZrxMg0.25Ni3.2Co0.2Al0.1(x=0,0.05, 0.1,0.15,0.2)were prepared by casting and *** influences of melt spinning on the electrochemical performances as well as the structures of the alloys were *** results obtained by XRD,SEM and TEM show that the as-cast and spun alloys have a multiphase structure,consisting of two main phases(La,Mg)Ni3 and LaNi5 as well as a residual phase *** melt spinning leads to an obvious increase of the LaNi5 phase and a decrease of the(La,Mg)Ni3 phase in the *** results of the electrochemical measurement indicate that the discharge capacity of the alloys(x≤0.1)first increases and then decreases with the increase of spinning rate,whereas for x0.1,the discharge capacity of the alloys monotonously *** melt spinning slightly impairs the activation capability of the alloys,but it significantly enhances the cycle stability of the alloys.