Enhancing (de)hydrogenation kinetics properties of the Mg/MgH_(2) system by adding ANi_(5)(A=Ce,Nd,Pr,Sm,and Y) alloys via ball milling

作     者：Wenfang Liao Wenbin Jiang Xu-Sheng Yang Hui Wang Liuzhang Ouyang Min Zhu Wenfang Liao;Wenbin Jiang;Xu-Sheng Yang;Hui Wang;Liuzhang Ouyang;Min Zhu

作者机构：Guangdong Provincial Key Laboratory of Advanced Energy Storage MaterialsSchool of Materials Science and EngineeringSouth China University of TechnologyGuangzhou 510641China China-Australia Joint Laboratory for Energy&Environmental MaterialsKey Laboratory of Fuel Cell Technology of Guangdong ProvinceGuangzhou 510641China Advanced Manufacturing Technology Research CentreDepartment of Industrial and Systems EngineeringThe Hong Kong Polytechnic UniversityHung HornKowloonHong KongChina Hong Kong Polytechnic University Shenzhen Research InstituteShenzhen 518057China 

出 版 物：《Journal of Rare Earths》 (稀土学报（英文版）)

年 卷 期：2021年第39卷第8期

页      面：1010-1016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：the National Key R&D Program of China(2018YFB1502101,2019YFB1505101) the Foundation for Innovative Research Groups of the National Natural Science Foundation of China(NSFC51621001) National Natural Science Foundation of China(51771075,51701171) 

主　　题：Mg-based hydrogen storage alloy Kinetic properties ANi_(5) Additives Rare earths 

摘      要：Magnesium(Mg)-based alloys have already been widely studied as the hydrogen storage materials because of their high reversible hydrogen storage capacity,low cost,light weight,***,the poor de/hydrogenation kinetic properties dramatically hinder the practical *** this work,the MgH_(2)-ANi_(5)(A=Ce,Nd,Pr,Sm,and Y) composites were prepared by a high-energy ball milling *** can effectively refine the particle size thus improving the kinetic *** results reveal that the MgH_(2)-ANi_(5) composites mainly consist of Mg_(2)NiH_(4),MgH_(2) and rare earth(RE) hydride,which will be dehydrogenated to form Mg_(2)Ni,Mg and stable RE hydride ***,the asmilled MgH_(2)-ANi_(5)(A=Ce,Nd,Pr,Sm,and Y) composites with various A-elements can respectively contribute to a reversible hydrogen storage capacity of 6.16 wt%,5.7 wt%,6.21 wt%,6.38 wt%,and 6.5 wt%at a temperature of 300℃,and show much better kinetic properties in comparison to the pure MgH_(2) without any ***-situ formed Mg_(2) Ni and stable RE hydride(such as CeH_(2.73) and YH_(2)) might act as effective catalysts to significantly improve the hydrogen storage properties of MgH_(2).The present work provides a guideline on improving the kinetic properties of the Mg-based hydrogen storage alloys.