Binder for secondary batteries
AssigneeSumitomo Seika Chemicals Co., Ltd.
InventorsYuki Kono, Moe Inui, Shun Hashimoto
Life of this patent
Estimating the term…
Abstract
The present invention provides a binder for a secondary battery that can reduce the initial resistance value of the secondary battery. A binder for a secondary battery comprising a polymer compound, wherein the polymer compound contains repeating units represented by formulae (1), (2), and (3): in formula (1), R1 is a hydrogen atom or a methyl group, and M is a hydrogen atom or an alkali metal atom; and in formula (3), R2 is a hydrogen atom or a methyl group; and when a total ratio of repeating units constituting the polymer compound is taken as 100 mol %, a total ratio of the repeating unit represented by formula (3) is less than 2 mol %.
Claims7
A binder for a secondary battery, comprising a polymer compound,
- wherein the polymer compound contains repeating units represented by formulae (1), (2), and (3):
- wherein in formula (1), R1 is a hydrogen atom or a methyl group, and M is a hydrogen atom or an alkali metal atom;
- and in formula (3), R2 is a hydrogen atom or a methyl group;
- and
- wherein when a total ratio of repeating units constituting the polymer compound is taken as 100 mol %, a total ratio of the repeating unit represented by formula (3) is 0.1 mol % or more and less than 2 mol %, and a total ratio of the repeating unit represented by formula (1) is 5 mol % or more and 20 mol % or less.
Dependencies are inferred from the claim text.