Building the Stable Oxygen Framework in High-Ni Layered Oxide Cathode for High-Energy-Density Li-Ion Batteries

作     者：Yang-Yang Wang Yu-Yang Wang Sheng Liu Guo-Ran Li Zhen Zhou Ning Xu Meng-Tao Wu Xue-Ping Gao Yang-Yang Wang;Yu-Yang Wang;Sheng Liu;Guo-Ran Li;Zhen Zhou;Ning Xu;Meng-Tao Wu;Xue-Ping Gao

作者机构：Institute of New Energy Material ChemistrySchool of Materials Science and EngineeringRenewable Energy Conversion and Storage CenterNankai UniversityTianjin 300350China Tianjin Bamo Tech Co.Ltd.Tianjin 300384China 

出 版 物：《Energy & Environmental Materials》 (能源与环境材料（英文）)

年 卷 期：2022年第5卷第4期

页      面：1260-1269页

核心收录：

学科分类：0710[理学-生物学] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 0808[工学-电气工程] 08[工学] 0807[工学-动力工程及工程热物理] 0815[工学-水利工程] 0805[工学-材料科学与工程（可授工学、理学学位）] 0706[理学-大气科学] 0702[理学-物理学] 

基　　金：supported by the National Key Research and Development Program(2016YFB0100500) the Fundamental Research Funds for the Central Universities of China 

主　　题：Li-ion batteries cathode high-Ni oxide oxygen evolution structure stability 

摘      要：High-Ni layered oxide cathodes hold a great promise for fabricating highenergy lithium-ion ***,the oxygen evolution during cycling is a crucial factor in the structure deterioration,potential change,and capacity decay of cathodes,limiting the commercial application of high-Ni(Ni0.9)layered oxides in ***,we demonstrate a feasible approach to enhance the stability of oxygen framework,through the surface oxygen immobilization with yttrium and bulk oxygen stabilization with aluminum in high-Ni layered *** expected,benefiting from the oxygen-stabilized framework,the bulk structure deterioration,and interfacial parasitic reaction are mitigated obviously during battery operation,along with the improved thermal stability of ***,the as-prepared high-Ni oxide delivers high reversible capacity,impressive cycle ability,and low potential polarization upon *** significant improvement on the electrochemical performance is primarily attributed to the strong oxygen affinities of both yttrium at the surface layer and aluminum in the bulk,which synergistically stabilizes the oxygen framework of high-Ni oxide via raising the energy barrier for oxygen ***,building the stable oxygen framework is critical for enhancing the energy density output,cycle operation,and thermal stability of high-Ni oxide cathodes.