公开(公告)号：US20180358626A1

公开(公告)日：2018-12-13

申请号：US16069197

申请日：2016-11-14

Applicant: Kureha Corporation

Inventor： Yoshiyuki NAGASAWA ,  Tamito IGARASHI

IPC: H01M4/62 ,  C08F214/22 ,  H01M4/133 ,  H01M10/0525

CPC classification number: H01M4/623 ,  C08F214/22 ,  C08F214/222 ,  C08F2800/20 ,  C08F2810/20 ,  C08L27/16 ,  H01M4/13 ,  H01M4/133 ,  H01M4/62 ,  H01M10/0525

Abstract: The present invention provides a binder composition which suppresses a swelling ratio in an electrolyte solution while having sufficient peel strength. The binder composition according to the present invention contains a copolymer including monomer units derived from vinylidene fluoride, a fluorine-containing alkyl vinyl compound, and a crosslinkable monomer; the content of the monomer unit derived from the fluorine-containing alkyl vinyl compound in the copolymer being not less than 2 mass % and less than 10 mass %; and the content of the monomer unit derived from the crosslinkable monomer being less than 5 mass %.