Structure and electrochemical performances of as-milled LaMg12-type alloy-Ni composites  

作　　者：Wen-gang Bi Wei Zhang Jin-liang Gao Yan Qi Dong-liang Zhao Xiao-ping Dong Yang-huan Zhang 

机构地区：[1]Department of Functional Material Research,Central Iron and Steel Research Institute,Beijing 100081,China [2]Key Laboratory of Integrated Exploitation of Baiyun Obo Multi-Metal Resources,Inner Mongolia University of Science and Technology,Baotou 014010,Inner Mongolia,China [3]Weishan Cisri-Eare Earth Materials Co.,Ltd,Jining 277600,Shandong,China [4]Department of Mechanical Engineering,Hebei University,Baoding 071002,Hebei,China

出　　处：《Journal of Iron and Steel Research International》2019年第1期59-68,共10页

基　　金：the National Natural Science Foundations of China(51161015 and 51371094).

摘　　要：LaMg11Ni+x wt.%Ni(x=100,200)alloys were prepared by ball milling and researched by various methods to study their structure and electrochemical hydrogen storage property.The outcomes reveal that increasing Ni content contributes to improving its electrochemical performance.Particularly,the discharge capacity of as-milled(40 h)alloy will be increased from 157.3 to 1053.5 mAh/g through enhancing Ni percentage from 100 to 200 wt.%when discharging at 60 mAh/g.Ball milling obviously affects the electrochemical performanee of alloys.With milling duration prolonging,the discharge capacity of x=100 alloy keeps increasing,while that of the x=200 alloy has a maximum value.Milling time also affects the cycle stability of experimental alloys.Extendi ng milli ng duration clearly decreases the cycle stability of x=100 alloy but weakens that of the x=200 alloy at first and strengthens it later.In addition,prolonging milling time makes the milling prepared x=100 and 200 alloys get the maximal values of high rate discharge ability of 81.60%and 84.52%,respectively.

关 键 词：LaMg12 ALLOY Mechanical MILLING Ni CONTENT MICROSTRUCTURE HYDROGEN STORAGE performance 

分 类 号：TF[冶金工程]