Bi nanoparticles encapsulated in nitrogen-doped carbon as a long-life anode material for magnesium batteries

查看全文 作　　者：Junjun [1,2]Wang;Ruohan [1]Yu;Jianxiang [1]Wang;Juncai [1]Long;Fan [1]Qiao;Lei [1]Zhang;Guanjie [2]He;Qinyou [1,3]An;Liqiang [1,3]Mai

机构地区：[1]State Key Laboratory of Advanced Technology for Materials Synthesis and Processing,School of Materials Science and Engineering,Wuhan University of Technology,Wuhan 430070,China;[2]Christopher Ingold Laboratory,Department of Chemistry,University College London,20 Gordon Street,London WC1H 0AJ,United Kingdom of Great Britain and Northern Ireland,United Kingdom;[3]Hubei Longzhong Laboratory,Wuhan University of Technology(Xiangyang Demonstration Zone),Xiangyang 441000,China

出　　处：《Journal of Magnesium and Alloys》索引2023年第11卷第11期,共8页

基　　金：supported by the National Natural Science Foundation of China (51972259,52127816,and 52202290);the National Key Research and Development Program of China (2020YFA0715000);the Natural Science Foundation of Hubei Province (2022CFA087);the funding support from China Scholarship Council/University College London for the joint Ph.D.scholarship (CXXM2110070005)。 摘　　要：Bismuth has garnered significant interest as an anode material for magnesium batteries(MBs) because of its high volumetric specific capacity and low working potential. Nonetheless, the limited cycling performance(≤100 cycles) limits the practical application of Bi as anode for MBs. Therefore, the improvement of Bi cycling performance is of great significance to the development of MBs and is also full of challenges. Here, Bi nanoparticles encapsulated in nitrogen-doped carbon with single-atom Bi embedded(Bi@NC) are prepared and reported as an anode material for MBs. Bi@NC demonstrates impressive performance, with a high discharge capacity of 347.5 mAh g^(-1) and good rate capability(206.4 mAh g^(-1)@500 mA g^(-1)) in a fluoride alkyl magnesium salt electrolyte. In addition, Bi@NC exhibits exceptional long-term stability, enduring 400 cycles at 500 mA g^(-1). To the best of our knowledge, among reported Bi and Bi-based compounds for MBs, Bi@NC exhibits the longest cycle life in this work. The magnesium storage mechanism of Bi@NC is deeply studied through X-ray diffraction, transmission electron microscopy and X-ray photoelectron spectroscopy. This work provides some guidance for further improving the cycling performance of other alloy anodes in MBs. 关键词：Magnesium batteries BISMUTH 3D tomography reconstruction Magnesium alloy SINGLE-ATOM

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Bi nanoparticles encapsulated in nitrogen-doped carbon as a long-life anode material for magnesium batteries

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