Ion diffusion,and hysteresis of magnesium hydride conversion electrode materials

查看全文 作　　者：Yingtong [1]Lv;Xiang [1]Zhang;Wei [2]Chen;Shunlong [2]Ju;Zhenhua [1]Liu;Guanglin [2]Xia;Takayuki [3]Ichikawa;Tengfei [1]Zhang;Xuebin [2]Yu 机构地区：[1]Centre for Hydrogenergy, College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;[2]Department of Materials Science, Fudan University, Shanghai 200433, China;[3]Graduate School of Engineering, Hiroshima University, 739-8530 Higashi, Hiroshima, Japan 出　　处：《Journal of Materials Science & Technology》索引2023年第24期,共7页 基　　金：financially supported by the National Natural Science Foundation of China(Nos.52171180,51802154,and 51971065);the National Science Fund for Distinguished Young Scholars(No.51625102);the Innovation Program of Shanghai Municipal Education Commission(No.2019-01-07-00-07-E00028);the Fundamental Research Funds for the Central Universities(No.NG2022005);the Scientific and Technological Innovation Special Fund for Carbon Peak and Carbon Neutrality of Jiangsu Province(No.BK20220039);the Open Fund for Graduate Innovation Base in Nanjing University of Aeronautics and Astronautics(No.xcxjh20210612). 摘　　要：MgH_(2),owing to a high theoretical capacity of 2038 mAh g^(−1),is regarded as a promising anode material for lithium-ion batteries(LIBs).However,the application of MgH_(2) is still far from satisfactory due to its poor cycling stability.Herein,nano-crystallization of MgH_(2) as an anode is applied for all-solid-state lithium-ion batteries(ASSLIBs)using LiBH4 as a solid-state electrolyte.The self-assembly designed MgH_(2) electrode on graphene could effectively alleviate the volume expansion,prevent the agglomeration of active substances,improve the electron transfer,and enhance the electrochemical performance of the anode material.As a result,a reversible capacity of 1214 mAh g^(−1) after 50 cycles is obtained.Significantly enhanced cycle life with a notable capacity of 597 mAh g^(−1) at a current density of 400 mA g^(−1) is delivered after 200 cycles.Further investigation on full cells also exhibits great application potential on ASSLIBs. 关 键 词：Magnesium hydride Lithium borohydrides GRAPHENE Nano-crystallization All-solid-state lithium-ion battery