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 

作者机构：Institute for Energy Electrochemistry and Urban Mines MetallurgySchool of MetallurgyNortheastern UniversityShenyang 110819LiaoningChina Australian Synchrotron(ANSTO)800 Blackburn RdClaytonVictoria 3168Australia School of Science and EngineeringUniversity of DundeeNethergateDundee DD14HNScotlandUK 

出 版 物：《Journal of Energy Chemistry》 (能源化学（英文版）)

年 卷 期：2024年第92卷第5期

页      面：216-223页

核心收录：

学科分类：0820[工学-石油与天然气工程] 0808[工学-电气工程] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 

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

主　　题：Sodium ion battery Layer-structured manganese-based oxides Cathodematerial Surface modification Elements doping 

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.