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

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.

发文机构：Key Laboratory of Integrated Exploitation of Baiyun Obo Multi-Metal Resources Department of Functional Material Research

关键词：Mg-basedalloyCesubstitutingMgMechanicalmillingElectrochemicalpropertyRareearths

分类号： TG1[金属学及工艺—金属学]