All-solid-state lithium-ion batteries have become the only way for the development of lithium-ion batteries in the future due to their advantages of high safety and high energy density. As the core component of all solid-state lithiumion batteries

polymer/inorganic composite solid electrolytes have many excellent properties of both inorganic solid electrolytes and solid polymer electrolytes

but they also face many challenges

including room temperature ion conductivity lower than 10

-3

S/cm and the interface impedance is large and so on. This article reviews the choice of polymer matrix for polymer/inorganic composite solid electrolytes

explores the types of inorganic fillers and their modification methods

and summarizes the preparation process of composite solid electrolyte membranes and prospects for its possible future development directions.