公开(公告)号：US20250135449A1

公开(公告)日：2025-05-01

申请号：US18835468

申请日：2023-01-30

Applicant: TOSOH CORPORATION

Inventor： Hiroshi INOUE ,  Eiichi TOUGOU

IPC: B01J45/00 ,  C02F1/42 ,  C02F1/62 ,  C08B37/00 ,  H01M4/13

Abstract: To provide a water-soluble chelating polymer that can rapidly trap a trace amount of heavy-metal ions to reduce the amount of heavy-metal ions to a ppm level or lower in a short time.
Use a water-soluble chelating polymer comprising an anionic polymer having a carboxy group, a sulfonate group and/or a sulfate group bonded through an ionic bond to a chelating functional group having a cationic functional group, wherein the water-soluble chelating polymer contains 0.2 to 6 mmol/g of the chelating functional group and has a weight-average molecular weight in the range of 30,000 to 1,000,000.

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.