Enabling structural and interfacial stability of 5 V spinel LiNi0.5Mn1.5O4 cathode by a coherent interface  

作　　者：Min Xu Ming Yang Minfeng Chen Lanhui Gu Linshan Luo Songyan Chen Jizhang Chen Bo Liu Xiang Han 

机构地区：[1]College of Materials Science and Engineering,Co-Innovation Center of Efficient Processing and Utilization of Forest Resources,Nanjing Forestry University,Nanjing 210037,Jiangsu,China [2]College of Chemistry and Environmental Engineering,Shenzhen University,Shenzhen 518060,Guangdong,China [3]College of Mathematics and Physics,Jingangshan University,Ji'an 343009,Jiangxi,China [4]Department of Physics Jiujiang Research Institute,Xiamen University,Xiamen 361005,Fujian,China

出　　处：《Journal of Energy Chemistry》2023年第1期266-276,I0007,共12页能源化学（英文版）

基　　金：supported by the Natural Science Foundation of Jiangsu Province(BK20200800);the National Natural Science Foundation of China(22209075,51902165,12004145);the Natural Science Foundation of Jiangxi Province(20212BAB214032,20192ACBL20048);the Key Science and Technology Plan Project of Ji’an City(20211-015311)。

摘　　要：Spinel LiNi_(0.5)Mn_(1.5)O_(4)(LNMO),a 5 V class high voltage cathode,has been regarded as an attractive candidate to further improve the energy density of lithium-ion battery.The issue simultaneously enabling side stability and maintaining high interfacial kinetics,however,has not yet been resolved.Herein,we design a coherent Li_(1.3)A_(l0.3)Ti_(1.7)(PO)_(4)(LATP)layer that is crystally connected to the spinel LNMO host lattices,which offers fast lithium ions transportation as well as enhances the mechanical stability that prevents the particle fracture.Furthermore,the inactive Li_(3)BO_(3)(LBO)coating layer inhibits the corrosion of transition metals and continuous side reactions.Consequently,the coherent-engineered LNMO-LATPLBO cathode material exhibits superior electrochemical cycling stability in a window of 3.0–5.0 V,for example a high-capacity retention that is 89.7%after 500 cycles at 200 m A g-1obtained and enhanced rate performance(85.1 m A h g^(-1)at 800 m A g^(-1))when tested with a LiPF6-based carbonate electrolyte.Our work presents a new approach of engineering 5 V class spinel oxide cathode that combines interfacial coherent crystal lattice design and surface coating.

关 键 词：Lithium-ion battery Spinel cathode LATP Coherent interface 

分 类 号：TM912[电气工程—电力电子与电力传动]