公开(公告)号：US20240380004A1

公开(公告)日：2024-11-14

申请号：US18409815

申请日：2024-01-11

Applicant: Northwestern Polytechnical University

Inventor： Yue MA ,  Ting LIU

IPC: H01M10/0565 ,  H01M10/0525

Abstract: A preparation method of a flame-retardant ultrathin PEO-based solid electrolyte is disclosed. The method includes the following steps: preparing a CN support layer; synthesizing a flame retardant-loaded multifunctional filler: HNT@TMP; mixing and stirring PEO, LiTFSI, and HNT@TMP in a certain ratio in acetonitrile to obtain PEO-based solid electrolyte slurry; coating both sides of the CN support layer obtained in step S1 with the PEO-based solid electrolyte slurry obtained in step S3, and performing drying; and performing hot pressing to obtain a PEO-based solid electrolyte. By adopting the preparation method of the flame-retardant ultrathin PEO-based solid electrolyte, the electrochemical performance and flame retardance of a PEO-based solid polymer electrolyte are improved through a multifunctional flame-retardant filler (HNT@TMP), and the mechanical strength of the ultrathin PEO electrolyte is ensured through porous cellulose nanopaper (CN) with excellent mechanical flexibility and thermal stability, whereby the development of high energy density is facilitated.