Towards extreme fast charging of 4.6 V LiCoO_(2) via mitigating high-voltage kinetic hindrance

作     者：Yu Tang Jun Zhao He Zhu Jincan Ren Wei Wang Yongjin Fang Zhiyong Huang Zijia Yin Yalan Huang Binghao Zhang Tingting Yang Tianyi Li Leighanne CGallington Si Lan Yang Ren Qi Liu Yu Tang;Jun Zhao;He Zhu;Jincan Ren;Wei Wang;Yongjin Fang;Zhiyong Huang;Zijia Yin;Yalan Huang;Binghao Zhang;Tingting Yang;Tianyi Li;Leighanne C.Gallington;Si Lan;Yang Ren;Qi Liu

作者机构：Department of PhysicsCity University of Hong KongHong Kong 999077China Department of Materials Science and EngineeringCity University of Hong KongHong Kong 999077China Shenzhen Research InstituteCity University of Hong KongShenzhen 518057GuangdongChina Argonne National LaboratoryX-Ray Science DivisionArgonneIL 60439USA 

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

年 卷 期：2023年第78卷第3期

页      面：13-20,I0001页

核心收录：

学科分类：0820[工学-石油与天然气工程] 081702[工学-化学工艺] 0808[工学-电气工程] 0817[工学-化学工程与技术] 08[工学] 0807[工学-动力工程及工程热物理] 0827[工学-核科学与技术] 0703[理学-化学] 

基　　金：supported by the National Key R&D Program of China(2020YFA0406203) the Shenzhen Science and Technology Innovation Commission(JCYJ20180507181806316,JCYJ20200109105618137) the ECS Scheme(City U 21307019,City U7020043,City U7005500,City U7005612) the Shenzhen Research Institute,City University of Hong Kong 

主　　题：Li-ion battery High-voltage LiCoO_(2) Li-ion diffusion Structural evolution Fast charging 

摘      要：High-voltage LiCoO_(2)(LCO) is an attractive cathode for ultra-high energy density lithium-ion batteries(LIBs) in the 3 C ***,the sluggish lithium-ion diffusion at high voltage significantly hampers its rate ***,combining experiments with density functional theory(DFT) calculations,we demonstrate that the kinetic limitations can be mitigated by a facial Mg^(2+)+Gd^(3+)co-doping *** as-prepared LCO shows significantly enhanced Li-ion diffusion mobility at high voltage,making more homogenous Li-ion de/intercalation at a high-rate charge/discharge *** homogeneity enables the structural stability of LCO at a high-rate current density,inhibiting stress accumulation and irreversible phase *** used in combination with a Li metal anode,the doped LCO shows an extreme fast charging(XFC) capability,with a superior high capacity of 193.1 mAh g^(-1)even at the current density of 20 C and high-rate capacity retention of 91.3% after 100 cycles at 5 *** work provides a new insight to prepare XFC high-voltage LCO cathode materials.