公开(公告)号：US20230183524A1

公开(公告)日：2023-06-15

申请号：US17767603

申请日：2020-12-29

Applicant: SOUTH CHINA NORMAL UNIVERSITY

Inventor： Weishan LI ,  Zhibin JIANG ,  Lidan XING ,  Youhao LIAO ,  Shiyu CHEN ,  Xiying JIAN ,  Jinxia HUANG

IPC: C09D179/02 ,  H01M50/449 ,  H01M50/426 ,  H01M50/417 ,  H01M10/052 ,  H01M4/13

CPC classification number: C09D179/02 ,  H01M50/449 ,  H01M50/426 ,  H01M50/417 ,  H01M10/052 ,  H01M4/13

Abstract: The present disclosure relates to the technical field of batteries, and specifically relates to a polyamine composite material and a preparation method therefor, a slurry, a separator, an electrode sheet, and a lithium-sulfur battery containing the same. The polyamine composite material comprises a carboxylated carbon-based material serving as a substrate and a polyamine serving as an outer surface layer, and the polyamine is uniformly and smoothly coated on the outer side surface and/or the inner pore surface of the carboxylated carbon-based material. The material is rich in amino groups and is uniform and stable, can be used in the lithium-sulfur battery, and can effectively adsorb lithium polysulfide during a long cycle process.

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.