Unraveling the Fundamental Mechanism of Interface Conductive Network Influence on the Fast‑Charging Performance of SiO‑Based Anode for Lithium‑Ion Batteries  

作　　者：Ruirui Zhang Zhexi Xiao Zhenkang Lin Xinghao Yan Ziying He Hairong Jiang Zhou Yang Xilai Jia Fei Wei 

机构地区：[1]Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology,Department of Chemical Engineering,Tsinghua University,Beijing 100084,People’s Republic of China [2]School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing 100083,People’s Republic of China [3]Beijing Key Laboratory of Chemical Power Source and Green Catalysis,School of Chemistry and Chemical Engineering,Beijing Institute of Technology,Beijing 100081,People’s Republic of China [4]Institute of Polymer Science and Engineering,Department of Chemical Engineering,Tsinghua University,Beijing 100084,People’s Republic of China

出　　处：《Nano-Micro Letters》2024年第3期53-68,共16页纳微快报（英文版）

基　　金：the National Natural Science Foundation of China(Nos.22209095 and 22238004).

摘　　要：Progress in the fast charging of high-capacity silicon monoxide(SiO)-based anode is currently hindered by insufficient conductivity and notable volume expansion.The construction of an interface conductive network effectively addresses the aforementioned problems;however,the impact of its quality on lithium-ion transfer and structure durability is yet to be explored.Herein,the influence of an interface conductive network on ionic transport and mechanical stability under fast charging is explored for the first time.2D modeling simulation and Cryo-transmission electron microscopy precisely reveal the mitigation of interface polarization owing to a higher fraction of conductive inorganic species formation in bilayer solid electrolyte interphase is mainly responsible for a linear decrease in ionic diffusion energy barrier.Furthermore,atomic force microscopy and Raman shift exhibit substantial stress dissipation generated by a complete conductive network,which is critical to the linear reduction of electrode residual stress.This study provides insights into the rational design of optimized interface SiO-based anodes with reinforced fast-charging performance.

关 键 词：Fast charging SiO anode Interface conductive network Ionic transport Mechanical stability 

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]