Regulating surface base of LiCoO_(2) to inhibit side reactions between LiCoO_(2) and sulfide electrolyte

作     者：Kai Yang Rong-Zheng Tian Zhen-Yu Wang Hong-Zhou Zhang Yue Ma Xi-Xi Shi Da-Wei Song Lian-Qi Zhang Ling-Yun Zhu Kai Yang;Rong-Zheng Tian;Zhen-Yu Wang;Hong-Zhou Zhang;Yue Ma;Xi-Xi Shi;Da-Wei Song;Lian-Qi Zhang;Ling-Yun Zhu

作者机构：School of Materials Science and EngineeringTianjin University of TechnologyTianjin 300384China Guilin Electrical Equipment Scientifie Research Institute Co.LudGuilin 541004China Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education)Nankai UniversityTianjin 300071China School of Materials Science and EngineeringAnhui UniversityHefei 230601China 

出 版 物：《Rare Metals》 (稀有金属（英文版）)

年 卷 期：2023年第42卷第12期

页      面：4128-4141页

核心收录：

学科分类：0808[工学-电气工程] 08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0827[工学-核科学与技术] 0703[理学-化学] 0702[理学-物理学] 

基　　金：financially supported by the National Key Research and Development Program of China (No.2018YFE0111600) the National Natural Science Foundation of China (Nos.52172224 and 22279090) the Science and Technology Major Project of China National Machinery Industry Corporation (No.SINOMAST-ZDZX-2019-04) 

主　　题：All-solid-state lithium battery Sulfide electrolyte LiCoO_(2) Surface base Interfacial stability 

摘      要：The interface instability between layered oxide cathode and sulfide electrolyte is a key point affecting the perform ance of sulfide-based all-solid-state lithium *** with fast-ionic conductor and constructing core-shell structure can effectively alleviate the interfacial side reactions and improve the interfacial stability between layered oxide and sulfide ***,what have been neglected is the surface base(including Li_(2)CO_(3) and LiOH)of layered oxide can also affect the interfacial *** clarify this point clearly and improve the interfacial stability,the surface base of LiCoO_(2)(LCO)is regulated and investigated in this ***,LCO with surface base Li_(2)CO_(3)(LCO@Li_(2)CO_(3))is prepared by the reaction of Co_(3)O_4 and excess Li_(2)CO_(3).Then,the bare LCO is obtained after LCO@Li_(2)CO_(3) is washed with deionized water and calcined ***,LCO with surface base Li_(2)O(LCO@Li_(2)O)is also prepared with the bare LCO and *** a result,the electrochemical performances of LCO@Li_(2)O are significantly improved and much higher than those of LCO@Li_(2)CO_(3) and the bare LCO *** particular,LCO@Li_(2)O-2 cathode display the most outstanding electrochemical performances(discharge capacity138.4 mAh·g^(-1)at 0.2C,105 mAh·g^(-1)at 2C and a capacity retention of 95.4%after 150 cycles at 0.5C).The high discharge capacity and excellent cycle stability of LCO@Li_(2)O electrode confirm the effectiveness of regulating the surface base of layered oxide from Li_(2)CO_(3) to Li_(2)*** surface base regulating is expected to be a simple but effective strategy to construct the stable interface between the cathode and the sulfide electrolyte of the all-solid-state lithium batteries.