One-step calcination synthesis of interface-coherent crystallized and surface-passivated LiNi_(0.5)Mn_(1.5)O_(4) for high-voltage lithium-ion battery  

作　　者：Min Xu Bifu Sheng Yong Cheng Junjie Lu Minfeng Chen Peng Wang Bo Liu Jizhang Chen Xiang Han Ming-Sheng Wang Siqi Shi 

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,China [2]State Key Laboratory of Physical Chemistry of Solid Surfaces,College of Materials,Xiamen University,Xiamen 361005,China [3]College of Mathematics and Physics,Jinggangshan University,Ji’an 343009,China [4]School of Materials Science and Engineering,Shanghai University,Shanghai 200444,China [5]Western Digital Corporation,951 Sandisk Dr,Milpitas,CA 95035,USA

出　　处：《Nano Research》2024年第5期4192-4202,共11页纳米研究（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.22209075,12004145);the Key Science and Technology Plan Project of Ji’an City(No.20211-015311);the Natural Science Foundation of Jiangsu Province(No.BK20200800).

摘　　要：LiNi_(0.5)Mn_(1.5)O_(4)(LNMO)with a spinel crystal structure presents a compelling avenue towards the development of economic cobalt-free and high voltage(~5 V)lithium-ion batteries.Nevertheless,the elevated operational voltage of LNMO gives rise to pronounced interfacial interactions between the distorted surface lattices characterized by Jahn-Teller(J-T)distortions and the electrolyte constituents.Herein,a localized crystallized coherent LaNiO_(3) and surface passivated Li_(3)PO_(4) layer is deposited on LNMO via a one-step calcination process.As evidenced by transmission electron microscopy(TEM),time-of-flight secondary ion mass spectrometry(ToF-SIMS)and density functional theory(DFT)calculation,the epitaxial growth of LaNiO_(3) along the LNMO lattice can effectively stabilize the structure and inhibit irreversible phase transitions,and the Li_(3)PO_(4) surface coating can prevent the chemical reaction between HF and transition metals without sacrificing the electrochemical activity.In addition,the ionic conductive Li_(3)PO_(4) and atomic wetting inter-layer enables fast charge transfer transport property.Consequently,the LNMO material enabled by the lattice bonding and surface passivating features,demonstrates high performance at high current densities and good capacity retention during long-term test.The rational design of interface coherent engineering and surface coating layers of the LNMO cathode material offers a new perspective for the practical application of high-voltage lithium-ion batteries.

关 键 词：high-voltage cathode interface-coherent surface passivating electrochemical performance 

分 类 号：TM912[电气工程—电力电子与电力传动]