Two positive effects with one arrow:Modulating crystal and interfacial decoration towards high-potential cathode material  

作　　者：Xuexiu Gu Xuan-Wen Gao Dongrun Yang Qinfen Gu YSong Hong Chen Tianzhen Ren Wen-Bin Luo 

机构地区：[1]Institute for Energy Electrochemistry and Urban Mines Metallurgy,School of Metallurgy,Northeastern University,Shenyang 110819,Liaoning,China [2]Australian Synchrotron(ANSTO),800 Blackburn Rd,Clayton,Victoria 3168,Australia [3]School of Science and Engineering,University of Dundee,Nethergate,Dundee DD14HN,Scotland,UK

出　　处：《Journal of Energy Chemistry》2024年第5期216-223,共8页能源化学（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant No.52272194);LiaoNing Revitalization Talents Program(Grant No.XLYC2007155)。

摘　　要：As the primary suppliers of cyclable sodium ions,O3-type layer-structured manganese-based oxides are recognized as highly competitive cathode candidates for sodium-ion batteries.To advance the development of high-energy sodium-ion batteries,it is crucial to explore cathode materials operating at high voltages while maintaining a stable cycling behavior.The orbital and electronic structure of the octahedral center metal element plays a crucial role in maintaining the octahedra structural integrity and improving Na^(+)ion diffusion by introducing heterogeneous chemical bonding.Inspired by the abundant configuration of extra nuclear electrons and large ion radius,we employed trace amounts of tungsten in this study.The obtained cathode material can promote the reversibility of oxygen redox reactions in the high-voltage region and inhibit the loss of lattice oxygen.Additionally,the formation of a Na_(2)WO_(4) coating on the material surface can improve the interfacial stability and interface ions diffusion.It demonstrates an initial Coulombic efficiency(ICE)of 94.6%along with 168.5 mA h g^(-1 )discharge capacity within the voltage range of 1.9-4.35 V.These findings contribute to the advancement of high-energy sodium-ion batteries by providing insights into the benefits of tungsten doping and Na_(2)WO_(4) coating on cathode materials.

关 键 词：Sodium ion battery Layer-structured manganese-based oxides Cathodematerial Surface modification Elements doping 

分 类 号：TM912[电气工程—电力电子与电力传动]