WATER-SOLUBLE POLYMER AS A BINDER FOR BATTERIES

Abstract

The present invention relates to a new water-soluble polymer, its use, in particular as a binder in the field of batteries, especially lithium-ion batteries, and a composition comprising said polymer.

Claims

14, as a binder in an electrode ink.

16. Composition comprising: - at least one water-soluble polymer according to one of claims 1 to 14; - optionally at least one flexibility agent chosen from polysaccharides, styrene-butadiene rubber and their mixtures; - at least one active material for electrode.

17. Composition according to claim 16, characterized in that the composition comprises an amount of water-soluble polymer of between 0.5 and 15% by weight relative to the total weight of the composition.

18. Composition according to claim 16 or 17, characterized in that the flexibility agent is a polysaccharide chosen from the group comprising carboxymethylcellulose, alginates, xanthan gums, diutan gum, welan gum, their salts and their mixtures.

19. Composition according to one of claims 16 to 18, characterized in that the composition comprises an amount of flexibility agent of between 0.5 and 10% by weight relative to the total weight of the composition.

20. Composition according to one of claims 16 to 19, characterized in that the composition has a weight ratio between the at least one water-soluble polymer and the at least one flexibility agent of between 0.1 and 30. will go ■■■■■ I NATIONAL INSTITUTE OF INDUSTRIAL PROPERTY PRELIMINARY RESEARCH REPORT National registration number FA 922089 FR 2308927 established on the basis of the latest claims filed before the start of the search DOCUMENTS CONSIDERED RELEVANT Claim(s) concerned Classification attributed to the invention by the INPI Category Citation of the document with indication, where necessary, of the relevant parts X FUKUMOTO HIROKAZU ET AL: 1-3,5-8, C08F 220 / 06 "Polystyrene-based Amphoteric Diblock 11-13, C08F 220 / 34 Copolymers with Upper Critical Solution 16,17 C08F 293 / 00 Temperature (UCST) in Aqueous Solutions", C08L 1 / 28 CHEMISTRY LETTERS, C08L 33 / 00 vol. 50, no. 6, June 5, 2021 (2021-06-05), C08L 53 / 00 pages 1114-1117, XP093130387, C08L 9 / 06 JP ISSN: 0366-7022, DOI: 10.1246 / cl.210135 * figures 1,4 * H01M 4 / 62 X GOHY JEAN-FRANÇOIS ET AL: "Aggregates Formed by Amphoteric Diblock Copolymers in Water", MACROMOLECULES, vol. 33, no. 17, August 1, 2000 (2000-08-01), pages 6378-6387, XP093130385, US ISSN: 0024-9297, DOI: 10.1021 / ma992016j * table 1 * 1,3-8 RESEARCHED TECHNICAL AREAS (IPC) x KAWATA YUUKI ET AL: "Thermo-Responsive 1,3-9, Behavior of Amphoteric Diblock Copolymers 11-13, H01G Bearing Sulfonate and Quaternary Amino 16,17 C08F Pendant Groups", LANGMUIR, vol. 35, no. 5, August 7, 2018 (2018-08-07), pages 1458-1464, XP093130381, US ISSN: 0743-7463, DOI: 10.1021 / acs.langmuir.8b01684 * figures 2,4 * C08L - / —. Date of completion of the research Examiner February 13, 2024 Jegou, Gwénaëlle EPO FORM 1503 12.99 (P04C14) CATEGORY OF CITED DOCUMENTS X: particularly relevant on its own Y: particularly relevant in combination with another document of the same category A: technological background O: unwritten disclosure P: intermediate document T: theory or principle underlying the invention E: patent document with a date prior to the filing date and which was only published on that filing date or on a later date. D: cited in the application L: cited for other reasons &: member of the same family, corresponding document EPO FORM 1503 12.99 (P04C14) OF INDUSTRIAL PROPERTY PRELIMINARY RESEARCH REPORT established on the basis of the latest claims filed before the start of the search DOCUMENTS CONSIDERED RELEVANT Category Citation of the document with indication, where necessary, of the relevant parts X ZHIYING XIONG ET AL: "Dual-stimuli responsive behaviors of diblock polyampholyte PDMAEMA-b-PAA in aqueous solution", JOURNAL OF COLLOID AND INTERFACE SCIENCE, ACADEMIC PRESS, INC, US, vol. 356, no. 2, January 20, 2011 (2011-01-20), pages 557-565, XP028172411, ISSN: 0021-9797, DOI: 10.1016 / J.JCIS.2011.01.067 [retrieved on 2011-01-25] * page 559; table 1 * 1 * A CN 109 935 476 B (UNIV QILU TECHNOLOGY) March 26, 2021 (2021-03-26) * claim 5 * CATEGORY OF CITED DOCUMENTS Date of completion of the research February 13, 2024 National registration number FA 922089 FR 2308927 Claim(s) concerned Classification attributed to the Invention by the INPI 1,6-8, 11,12 1,4-9, 11-13 1,4,6-14 TECHNICAL FIELDS RESEARCHED (IPC) 15,18-20 Examiner Jegou, Gwénaëlle X: particularly relevant on its own Y: particularly relevant in combination with another document of the same category A: technological background O: unwritten disclosure P: intermediate document T: theory or principle underlying the invention E: patent document with a date prior to the filing date and which was only published on that filing date or on a later date. D: cited in the application L: cited for other reasons &: member of the same family, corresponding document