Efficient Chemical Prelithiation with Modificatory Li^(+) Solvation Structure Enabling Spatially Homogeneous SEI toward High Performance SiO_(x) Anode  

作　　者：Ruoyang Wang Yuqing Wu Yifan Niu Qing Yang Haoyu Li Yang Song Benhe Zhong Liwen Yang Ting Chen Zhenguo Wu Xiaodong Guo 

机构地区：[1]School of Chemical Engineering,Sichuan University,Chengdu,Sichuan 610065,China [2]Chengdu No.7 High School,Chengdu,Sichuan 6100412,China [3]Institute for Applied Materials(IAM),Karlsruhe Institute of Technology(KIT),Hermann-von-Helmholtz-Platz1,D-76344 Eggenstein-Leopoldshafen,Germany [4]Institute for Advanced Study,Chengdu University,Chengdu,Sichuan 610106,China

出　　处：《Chinese Journal of Chemistry》2024年第17期2056-2065,共10页中国化学（英文版）

基　　金：supported by projects from the National Natural Science Foundation of China(No.U20A20145);State Key Laboratory of Polymer Materials Engineering(No.sklpme2020-3-02);Sichuan Provincial Department of Science and Technology(No.2020YFG0022,No.2022YFG0124);Dazhou Department of Science and Technology(No.21ZDYF0001);Guangyuan Department of Science and Technology(No.22ZDYF0047);Sichuan Province Science and Technology Achievement Transfer and Transformation Project(No.21ZHSF0111);2020 Strategic Cooperation Project between Sichuan University and Suining Municipal People's Government Government(No.20221500008704170);the Open Project of State Key Laboratory of Environment-friendly Energy.Materials(No.20KFHG07);Start-up funding of Chemistry and Chemical Engineering Guangdong Laboratory(No.2122010).

摘　　要：Chemical prelithiation is widely proven to be an effective strategy to address the low initial coulombic efficiency(ICE)of promising SiO_(x) anode.Though the reagent composition has been widely explored,the Li^(+) solvation structure,which practically plays the cornerstone role in the prelithiation ability,rate,uniformility,has rarely been explored.A novel environmentally-friendly reagent with weak solvent cyclopentyl methyl ether(CPME)is proposed that enables both improved ICE and spatial homogeneous solid electrolyte interphase(SEl).And the prelithiation behavior and mechanism were explored focused on the Li^(+) solvation structure.Both theoretical investigation and spectroscopic results suggest that weak solvent feature of CPME reduces the solvent coordination number and decreases the Li^(+) desolvation energy.

关 键 词：Lithium-ion battery SiO_(x)anode Prelithiation Weak solvent Homogeneous SEI Energy conversion Desolvation energy 

分 类 号：O62[理学—有机化学]