Effect of B and Fe substitution on structure of AB_3-type Co-free hydrogen storage alloy

作     者：吴锋 张旻昱 穆道斌 

作者机构：Beijing Key Laboratory of Environmental Science and EngineeringSchool of Chemical Engineering and EnvironmentBeijing Institute of Technology National Development Center of Hi-Tech Green Materials 

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10期

页      面：1885-1891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(2007AA11A104) supported by the High-tech Research and Development Program of China Project(2009CB220100) supported by the National Basic Research Program of China 

主　　题：Ni-MH battery AB3-type B substitution Co-free hydrogen storage alloy 

摘      要：A series of hydrogen storage Co-free AB3-type alloys were directly synthesized with vacuum mid-frequency melting method,within which Ni of La0.7Mg0.3Ni3 alloy was substituted by Fe,B and(FeB) alloy,*** were characterized by XRD,EDS and SEM to investigate the effects of B and Fe substitution for Ni on material *** content of LaMg2Ni9 phase within La0.7Mg0.3Ni3 alloy reaches 37.9% and that of La0.7Mg0.3Ni2.9(FeB)0.1 alloys reduces to 23.58%.Among all samples,ground particles with different shapes correspond to different *** major substitution occurs in LaMg2Ni9 *** tests indicate that substituted alloys have different electrochemical performance,which is affected by phase structures of *** discharge capacity of La0.7Mg0.3Ni3 alloy reaches 337.3 mA·h/g,but La0.7Mg0.3Ni2.9(FeB)0.1 alloy gets better high rate discharge(HRD) performance at the discharge rate of 500 mA/g with a high HRD value of 73.19%.