公开(公告)号：US20220190436A1

公开(公告)日：2022-06-16

申请号：US17605430

申请日：2020-10-14

Applicant: SOUTH CHINA NORMAL UNIVERSITY

Inventor： Weishan LI ,  Yucheng WEN ,  Huiyang CHEN ,  Jiawei CHEN ,  Yitong LU ,  Yanxia CHE

IPC: H01M50/426 ,  H01M50/449 ,  H01M10/0525 ,  H01M4/133 ,  H01M4/131 ,  H01M4/583 ,  H01M4/505 ,  H01M4/525

Abstract: Provided is a method for preparing a battery separator coating material, the method comprising: dissolving PVDF and a covalent organic backbone material in an organic solvent and stirring same until uniform. The mass ratio of the PVDF to the covalent organic backbone material to N-methylpyrrolidone is 20: (70-85):(5-10). When the material is applied to preparation of a lithium ion battery separator, the problem of metal dissolution when a transition metal oxide is used as a positive electrode material can be effectively solved. The prepared separator can effectively adsorb metal ions and prevent the metal ions from being deposited on a negative electrode during charging and discharging processes, such that the cycle performance of a transition metal oxide positive electrode material is improved.