Rational design of F,N-rich artificial interphase via chemical prelithiation initiation strategy enabling high coulombic efficiency and stable micro-sized SiO anodes  

作　　者：Quanyan Man Hengtao Shen Chuanliang Wei Baojuan Xi Shenglin Xiong Jinkui Feng 

机构地区：[1]Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials(Ministry of Education),School of Materials Science and Engineering,Shandong University,Jinan 250061,Shandong,China [2]School of Chemistry and Chemical Engineering,Shandong University,Jinan 250100,Shandong,China

出　　处：《Journal of Energy Chemistry》2024年第5期224-232,共9页能源化学（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(Nos.51972198 and 62133007);the Natural Science Foundation of Shandong Province(ZR2020JQ19);the Taishan Scholars Program of Shandong Province(Nos.tsqn201812002 and ts20190908)。

摘　　要：Silicon monoxide(SiO)is regarded as a potential candidate for anode materials of lithium-ion batteries(LIBs).Unfortunately,the application of SiO is limited by poor initial Coulombic efficiency(ICE)and unsteady solid electrolyte interface(SEI),which induce low energy,short cycling life,and poor rate properties.To address these drawbacks of SiO,we achieve in-situ construction of robust and fast-ion conducting F,N-rich SEI layer on prelithiated micro-sized SiO(P-μSiO)via the simple and continuous treatment ofμSiO in mild lithium 4,4′-dimethylbiphenyl solution and nonflammable hexafluorocyclotriphosphazene solution.Chemical prelithiation eliminates irreversible capacity through pre-forming inactive lithium silicates.Meanwhile,the symbiotic F,N-rich SEI with good mechanical stability and fast Li^(+)permeability is conductive to relieve volume expansion ofμSiO and boost the Li+diffusion kinetics.Consequently,the P-μSiO realizes an impressive electrochemical performance with an elevated ICE of 99.57%and a capacity retention of 90.67%after 350 cycles.Additionally,the full cell with P-μSiO anode and commercial LiFePO_(4) cathode displays an ICE of 92.03%and a high reversible capacity of 144.97 mA h g^(-1).This work offers a general construction strategy of robust and ionically conductive SEI for advanced LIBs.

关 键 词：Chemical prelithiation Silicon monoxide SEI Lithium-ion batteries INTERPHASE engineering 

分 类 号：TQ127.2[化学工程—无机化工] TM912[电气工程—电力电子与电力传动]