The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 15, 2026
Filed:
Feb. 25, 2021
Tokyo University of Science Foundation, Tokyo, JP;
Tosoh Corporation, Shunan, JP;
Tatsuo Horiba, Tokyo, JP;
Kei Kubota, Tokyo, JP;
Yoshinari Abe, Tokyo, JP;
Asako Oishi, Tokyo, JP;
Shinichi Komaba, Tokyo, JP;
Hiroshi Inoue, Yokkaichi, JP;
Eiichi Tougou, Yokkaichi, JP;
Tokyo University of Science Foundation, Tokyo, JP;
TOSOH CORPORATION, Shunan, JP;
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.