Research progress of polymer-inorganic filler solid composite electrolyte for lithium-ion batteries

Solid electrolyte is an important part of all-solid-state lithium-ion battery, and it is the key and difficult point in the research of all-solid-state lithium-ion battery. Both solid polymer electrolyte and inorganic ceramic electrolytes have obvious deficiencies in electrochemical and mechanical properties, but polymer-inorganic filler solid composite electrolyte is obtained by adding inorganic filler into solid polymer electrolyte and this way can complement their shortcomings. In this paper, the effect of inorganic fillers on lithium-ion migration in polymer electrolyte is analyzed. The latest research progress of solid composite electrolyte based on polyethylene oxide, polyacrylonitrile, and polycarbonate is introduced, which provides guidance for the research of solid composite electrolyte in the future.