Structure and electrochemical performance of hydrogen storage alloy La_(0.7)Mg_(0.3)Ni_(2.875)Co_(0.525)Mn_(0.1)-boron composite

作     者：LIU Yi WANG Yijing XIAO Lingling CAO Jiansheng JIAO Lifang FENG Yan YUAN Huatang 

作者机构：Institute of New Energy Material ChemistryNankai UniversityTianjin 300071China 

出 版 物：《Rare Metals》 (稀有金属(英文版))

年 卷 期：2006年第25卷第z1期

页      面：261-265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：This work was financially supported by the National Natural Science Foundation of China(No.20573058) 

主　　题：AB_(3)type hydrogen storage alloys composite materials structure characteristics electrochemical performance 

摘      要：The structure and electrochemical characteristics of La_(0.7)Mg_(0.3)Ni_(2.875)Co_(0.525)Mn_(0.1)-boron composite was studied *** AB_(3) type hydrogen storage alloys La_(0.7)Mg_(0.3)Ni_(2.875)Co_(0.525)Mn_(0.1) were successfully synthesized by means of inter-media alloy La_(2)Mg_(17).The alloys were composited with boron at different weight *** the XRD analyses,each alloy of this series is mainly composed of(La,Mg)Ni_(3) phase and the LaNi_(5) phase,and the phase abundance of each phase varies with the boron weight rate,moreover,after composition,the c and cell volumes of(La,Mg)Ni_(3) phase increase,and the LaNi_(5) phase keep the same,which indicate that the boron may enter(La,Mg)Ni_(3) *** electrochemical studies show that the maximum discharge capacity of the composites decreases,but the cycling life *** the high rate discharge ability and exchange impendence spectroscopy(EIS)of the AB_(3) alloys and its composite were also studied.