La-Mg-Ni系A_(2)B_(7)型电极材料的研究进展  

Research progress in La-Mg-Ni system A_(2)B_(7)-type electrode materials

作　　者：李亚琴 尚宏伟 查文珂 葛绪进 LI Ya-qin;SHANG Hong-wei;ZHA Wen-ke;GE Xu-jin(College of Physics and Electrical Engineering,Anyang Normal University,Anyang,Henan 455000,China;Guangxi Key Laboratory of Processing for Non-Ferrous Metals and Featured Materials,College of Resources,Environment and Materials,Guangxi University,Nanning,Guangxi 530004,China;Key Laboratory of Structure and Functional Regulation of Hybrid Materials(Ministry of Education),Institutes of Physical Science and Information Technology,Anhui University,Hefei,Anhui 230601,China)

机构地区：[1]安阳师范学院物理与电气工程学院,河南安阳455000 [2]广西大学资源环境与材料学院,广西有色金属及特色材料加工重点实验室,广西南宁530004 [3]安徽大学物质科学与信息技术研究院,杂化材料结构与功能调控教育部重点实验室,安徽合肥230601

出　　处：《电池》2022年第6期698-702,共5页Battery Bimonthly

基　　金：国家自然科学基金项目(52001005);河南省高等学校重点科研项目(21A430003);安阳市科技计划项目(2021C01GX011);安阳师范学院科研培育基金项目(AYNUKPY-2020-18/AYNUKPY-2019-13);教育部产学合作协同育人项目(202102306014);安阳市重点研发与推广专项-国际科技合作(2020259/2020083);广西有色金属及特色材料加工重点实验室开放课题(2020GXYSOF09);2020年功能无机材料化学教育部重点实验室(黑龙江大学)开放课题;2021年杂化材料结构与功能调控教育部重点实验室(安徽大学)开放课题。

摘　　要：La-Mg-Ni系A_(2)B_(7)型超晶格储氢合金具有储氢密度高和原材料成本低等优点,是在La-Ni二元金属间化合物基础上发展起来的。Mg的加入,可抑制La_(2)Ni_(7)合金的氢致非晶化现象,但电化学性能,如放电容量较低和循环稳定性较差,仍有待改善。深入分析晶体结构特点,从元素含量调节、元素替代等成分设计角度,以及真空感应熔炼、真空热处理、机械球磨和表面改性等制备工艺角度,综述该合金的研究进展,并展望在低自放电电池和混合动力汽车等领域的应用前景。La-Mg-Ni system A_(2)B_(7)-type superlattice hydrogen storage alloys had the advantages of high hydrogen storage density and low raw material cost,which was based on La-Ni binary intermetallic compounds.The addition of Mg could inhibit the hydrogen-induced amorphous phenomenon of La_(2)Ni_(7)alloy,while the electrochemical performance still needed to be improved such as low discharge capacity and poor cycle stability.The crystal structure characteristics of the alloys were deeply analyzed,the research progress in the alloys was reviewed from the aspects of composition design such as element content adjustment and element substitution and preparation process such as vacuum induction melting,vacuum heat treatment,mechanical milling and surface modification.The application prospect of the alloys in the fields of low self-discharge battery and hybrid electric vehicle was forecasted.

关 键 词：LA-MG-NI系 储氢合金 晶体结构 氢致非晶化 电化学性能 

分 类 号：TM912.2[电气工程—电力电子与电力传动]