Structure and electrochemical hydrogen storage behaviors of Mg-Ce-Ni-Al-based alloys prepared by mechanical milling  

作　　者：Yanghuan Zhang Pengpeng Wang Wei Zhang Wengang Bu Yan Qi Shihai Guo 

机构地区：[1]Key Laboratory of Integrated Exploitation of Baiyun Obo Multi-Metal Resources,Inner Mongolia University of Science and Technology,Baotou 014010,China [2]Department of Functional Material Research,Central Iron and Steel Research Institute,Beijing 100081,China

出　　处：《Journal of Rare Earths》2020年第10期1093-1102,I0003,共11页稀土学报（英文版）

基　　金：Project supported by the National Natural Science Foundation of China (51761032 and 51871125)。

摘　　要：The influences of milling time and Ce content on the electrochemical property and micro structure of asmilled Mg1-xCexNi0.9Al0.1(x=0,0.02,0.04,0.06,0.08)+50 wt%Ni alloys were investigated systematically.The as-milled alloys have an outstanding activation property.The cycle stability conspicuously grows up with milling time and Ce proportion increasing.The capacity retention rate at 100 th cycle of x=0.02 alloy augments from 47% to 63% when prolonging milling time from 5 to 30 h and it grows from55% to 82% for the 30 h milled alloy with Ce content growing from 0 to 0.08.The discharge capacity of x=0.02 alloy grows up invariably with milling time prolonging,while that of the 30 h milled alloys has the maximal value of 578.4 mAh/g with Ce content increasing.Moreover,the electrochemical kinetic properties of alloys significantly improve with milling duration extending,while they have the maximal values with Ce proportion varying.

关 键 词：Mg-based alloy Ce substituting Mg Mechanical milling Electrochemical property Rare earths 

分 类 号：TG139.7[一般工业技术—材料科学与工程]