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A general strategy for all-solid-state batteries with agglomeration-free and high conductivity achieved by improving the interface compatibility of fillers and polymer matrix
Wang, Jiamin1; Ma, Xiang1; Liu, Mian1; Wu, Qingping2; Guan, Xiang3; Wang, Fei1; Liu, Hongmei1; Xu, Jun1
2024-10-01
摘要Composite solid electrolytes (CSEs) composed of polymer matrix and inorganic fillers show considerable potential for applications in all-solid-state lithium (Li) metal batteries. However, challenges such as fillers agglomeration and low lithium ion transference number (t(Li+)) remain significant obstacles to the practical application of CSEs. Herein, a general strategy of graft polymerization on the fillers surface to modulate the interface compatibility with the polymer matrix is proposed, and CSEs are prepared to verify the feasibility. The microstructure and composition of the surface coating of the fillers are analyzed, with subsequent studies of the fillers distribution within the CSEs confirming the improved interface compatibility. The enhancement of interface compatibility facilitates uniform dispersion of fillers, thereby greatly improving the utilization of fillers. CSEs exhibits high ionic conductivity (0.163 mS.cm(-1) at 30 degrees C) and t(Li+) (0.77), which gives the battery excellent rate performance and cycle stability. Therefore, chemical grafting of polymer onto the fillers surface to enhance the interface compatibility with the polymer matrix represents a promising strategy for the practical application of solid-state batteries.
关键词Composite solid electrolyte Graft polymerization Fillers modification Interface compatibility Ionic conductivity
DOI10.1016/j.jcis.2024.05.139
发表期刊JOURNAL OF COLLOID AND INTERFACE SCIENCE
ISSN0021-9797
卷号671页码:248-257
通讯作者Ma, Xiang(644933864@qq.com) ; Xu, Jun(xujun@ecust.edu.cn)
收录类别SCI
WOS记录号WOS:001247068900001
语种英语