公开(公告)号：US20230124539A1

公开(公告)日：2023-04-20

申请号：US17909497

申请日：2021-02-25

Applicant: Tokyo University of Science Foundation ,  TOSOH CORPORATION

Inventor： Tatsuo HORIBA ,  Kei KUBOTA ,  Yoshinari ABE ,  Asako OISHI ,  Shinichi KOMABA ,  Hiroshi INOUE ,  Eiichi TOUGOU

IPC: H01M4/62 ,  C08B37/00 ,  C08B11/12

Abstract: The present invention provides a binder for positive electrode of lithium ion battery which is excellent in workability at the time of producing a positive electrode, is excellent in charge and discharge characteristics such as cycle characteristics and rate characteristics, and enables to possible to produce a positive electrode having an extended cycle life, as well as the present invention provides a slurry for forming positive electrode mixture layer of lithium ion battery, a positive electrode for lithium ion battery, and a lithium ion battery, using the same. As a binder for binding a positive electrode active material, a conductive aid and a current collector at a positive electrode of a lithium ion battery, by using one containing a polysaccharide introduced with at least one ion exchange group selected from the group consisting of sulfate groups and alkali metal sulfate groups, it is possible to provide a lithium ion battery with excellent charge and discharge characteristics and an extended cycle life.