Effects of spinning rate on structures and electrochemical hydrogen storage performances of RE-Mg-Ni-Mn-based AB_2-type alloys

作     者：Yang-huan ZHANG Wei ZHANG Xi-ping SONG Pei-long ZHANG Yong-guo ZHU Yan QI 张羊换;张巍;宋希平;张沛龙;朱永国;祁焱

作者机构：Key Laboratory of Integrated Exploitation of Baiyun Obo Multi-metal ResourcesInner Mongolia University of Science and Technology Baotou 014010 China Department of Functional Material Research Central Iron and Steel Research Institute Beijing 100081 China Whole Win (Beijing) Materials Sci. & Tech. Co. Ltd. Beijing 100083 China 

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

年 卷 期：2016年第26卷第12期

页      面：3219-3231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：Projects(51371094 51471054)supported by the National Natural Science Foundation of China 

主　　题：Ni.MH battery hydrogen storage melt spinning discharge capacity kinetics 

摘      要：La was partially substituted by Ce with the aim of improving the electrochemical hydrogen storage performances ofLa1–xCexMgNi3.5Mn0.5 (x=0, 0.1, 0.2, 0.3, 0.4) alloys, and melt spinning technology was adopted to fabricate the alloys. Theidentification of XRD and SEM reveals that the experimental alloys consist of a major phase LaMgNi4 and a secondary phase *** growth of spinning rate results in that the lattice constants and cell volume increase and the grains are markedly refined. Theelectrochemical measurement shows that the as-cast and spun alloys can obtain the maximum discharge capacities just at the firstcycle without any activation needed. With the increase of spinning rate, the discharge capacities of the alloys first increase and thendecline, whereas their cycle stabilities always grow. Moreover, the electrochemical kinetic performances of the alloys first increaseand then decrease with spinning rate growing.