Polymer solid electrolytes have attracted much attention due to their excellent processability,flexibility,good interfacial compatibility,dimensional stability during charging and discharging.However,commercial polyethylene oxide(PEO)-based polymer electrolytes face challenges such as high material crystallinity and poor electrochemical stability,which lead to low ionic conductivity,unstable cycling performance,and a narrow voltage window for batteries,limiting the popularization and application of solid-state batteries.This review focus on the development and application of composite solid-state electrolytes made from PEO materials and discuss in detail how to improve the comprehensive performance of these electrolytes through material blending,doping modification,and interface optimization to meet the needs of solid-state batteries with high safety,high energy density,and long cycle life.Finally,the future research on solid-state electrolytes has look forward.
维普
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