High-performance LiNi_(0.8)Mn_(0.1)Co_(0.1)O_(2) cathode by nanoscale lithium sulfide coating via atomic layer deposition

作     者：Xin Wang Jiyu Cai Yang Ren Mourad Benamara Xinwei Zhou Yan Li Zonghai Chen Hua Zhou Xianghui Xiao Yuzi Liu Xiangbo Meng Xin Wang;Jiyu Cai;Yang Ren;Mourad Benamara;Xinwei Zhou;Yan Li;Zonghai Chen;Hua Zhou;Xianghui Xiao;Yuzi Liu;Xiangbo Meng

作者机构：Department of Mechanical EngineeringUniversity of ArkansasFayettevilleAR 72701USA Chemical Sciences and Engineering DivisionArgonne National LaboratoryLemontIL 60439USA The Advanced Photon SourceArgonne National LaboratoryLemontIL 60439USA Institute for Nanoscience and EngineeringUniversity of ArkansasFayettevilleAR 72701USA Center for Nanoscale MaterialsArgonne National LaboratoryLemontIL 60439USA Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China University of Chinese Academy SciencesBeijing 100049China National Synchrotron Light Source IIBrookhaven National LaboratoryUptonNY 11973USA 

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

年 卷 期：2022年第31卷第6期

页      面：531-540,I0015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] 0703[理学-化学] 

基　　金：support from the Center for Advanced Surface Engineering, under the National Science Foundation Grant No. OIA-1457888 the Arkansas EPSCoR Program, ASSET Ⅲ. X. M the financial support from the University of Arkansas, Fayetteville, AR, USA funded by the U.S. Department of Energy (DOE), Vehicle Technologies Office 

主　　题：Nickel-rich cathodes Atomic layer deposition Lithium sulfide Microcracking Phase transition Interfacial reactions 

摘      要：The commercialization of nickel-rich LiNi_(0.8)Mn_(0.1)Co_(0.1)O_(2)(NMC811) has been hindered by its continuous loss of practical capacity and reduction in average working *** address these issues,surface modification has been well-recognized as an effective *** from the coatings reported in literature to date,in this work,we for the first time report a sulfide coating,amorphous Li_(2)S via atomic layer deposition (ALD).Our study revealed that the conformal nano-Li_(2)S coating shows exceptional protection over the NMC811 cathodes,accounting for the dramatically boosted capacity retention from~11.6%to~71%and the evidently mitigated voltage reduction from 0.39 to 0.18 V after 500 charge–discharge *** addition,the Li_(2)S coating remarkably improved the rate capability of the NMC811 *** investigation further revealed that all these beneficial effects of the ALD-deposited nano-Li_(2)S coating lie in the following aspects:(i) maintain the mechanical integrity of the NMC811 electrode:(ii) stabilize the NMC electrode/electrolyte interface:and (iii) suppress the irreversible phase transition of NMC ***,this study also has revealed that the nano-Li_(2)S coating has played some unique role not associated with traditional non-sulfide coatings such as *** this regard,we disclosed that the Li_(2)S layer has reacted with the released O_(2) from the NMC lattices,and thereby has dramatically mitigated electrolyte oxidation and electrode ***,this study is significant and has demonstrated that sulfides may be an important class of coating materials to tackle the issues of NMCs and other layered cathodes in lithium batteries.