US 11,817,579 B2
Cathode composition for lithium-ion battery
Bruno Dufour, Champagne sur Seine (FR); Marc Zimmermann, Achenheim (FR); Ksenia Astafyeva, Montargis (FR); and Melanie Leclerc, Amilly (FR)
Assigned to HUTCHINSON, Paris (FR)
Appl. No. 16/754,606
Filed by HUTCHINSON, Paris (FR)
PCT Filed Sep. 27, 2018, PCT No. PCT/FR2018/052384
§ 371(c)(1), (2) Date Apr. 8, 2020,
PCT Pub. No. WO2019/073140, PCT Pub. Date Apr. 18, 2019.
Claims priority of application No. 1759445 (FR), filed on Oct. 9, 2017.
Prior Publication US 2020/0358095 A1, Nov. 12, 2020
Int. Cl. H01M 4/525 (2010.01); H01M 4/04 (2006.01); H01M 4/1399 (2010.01); H01M 4/62 (2006.01); H01M 4/66 (2006.01); H01M 10/0525 (2010.01); H01M 10/0569 (2010.01); H01M 4/02 (2006.01)
CPC H01M 4/525 (2013.01) [H01M 4/0466 (2013.01); H01M 4/1399 (2013.01); H01M 4/622 (2013.01); H01M 4/625 (2013.01); H01M 4/661 (2013.01); H01M 10/0525 (2013.01); H01M 10/0569 (2013.01); H01M 2004/021 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A cathode composition for a lithium-ion battery, the cathode composition comprising an active material which comprises an alloy of lithium nickel cobalt aluminum oxides, an electrically conductive filler and a polymeric binder,
wherein said polymeric binder comprises at least one modified polymer which is a product of a thermal oxidation reaction of a starting polymer and which incorporates oxygenated groups comprising CO groups and OH groups, in which the starting polymer
(i) comprises a nonhydrogenated acrylonitrile/butadiene copolymer (NBR) and/or a hydrogenated acrylonitrile/butadiene copolymer (HNBR) which each exhibit(s) a content by weight of units resulting from acrylonitrile equal to or greater than 40%, the at least one modified polymer being crosslinked by the thermal oxidation reaction, or
(ii) is a nonpolar aliphatic hydrocarbon polyolefin, the at least one modified polymer not being crosslinked and having a content by weight of oxygen atoms of between 2% and 10% inclusive,
the cathode composition being obtained by a molten route and without evaporation of solvent, the cathode composition being a product of said thermal oxidation reaction applied to a solvent-free precursor mixture comprising said active material, said electrically conductive filler, said starting polymer and a sacrificial polymer phase, said sacrificial polymer phase comprising at least one poly(alkene carbonate) polyol comprising end groups, more than 50 mol % of which comprise hydroxyl functional groups.