公开(公告)号：US20230307785A1

公开(公告)日：2023-09-28

申请号：US18016027

申请日：2021-07-05

Applicant: EVONIK OPERATIONS GMBH

Inventor： Yuan-Chang HUANG ,  Daniel ESKEN ,  Uwe KINZLINGER ,  Gerold SCHMIDT ,  Guido SCHARF ,  Chih-Hung LEE ,  Hung-Chun WU ,  Yu-Han LIN ,  Ting-Fang LIN

IPC: H01M50/417 ,  H01M10/0525 ,  H01M50/403 ,  H01M50/423

CPC classification number: H01M50/417 ,  H01M10/0525 ,  H01M50/403 ,  H01M50/423

Abstract: A method for manufacturing a porous membrane suitable for use as a separator of a lithium ion battery, comprising the following steps: 1) compounding a polymer and hydrophobic filler by dry mixing; 2) extruding the compounded mixture to obtain a cast film and 3) stretching the cast film to obtain the porous membrane. A porous membrane suitable for use as a separator of a lithium ion battery, a separator for a lithium ion battery, a lithium ion battery, and a device are also provided.