	US 12,244,016 B2
	Electrode binder composition, electrode coating composition, power storage device electrode, and power storage device
Ayano Sofue, Kyoto (JP); Toshiya Watanabe, Kyoto (JP); and Yasuteru Saito, Kyoto (JP)
Assigned to DKS CO. LTD., Kyoto (JP)
Appl. No. 17/604,215
Filed by DKS Co. Ltd., Kyoto (JP)
PCT Filed Mar. 5, 2020, PCT No. PCT/JP2020/009402 § 371(c)(1), (2) Date Oct. 15, 2021, PCT Pub. No. WO2020/217730, PCT Pub. Date Oct. 29, 2020.
Claims priority of application No. 2019-080601 (JP), filed on Apr. 22, 2019; and application No. 2019-218504 (JP), filed on Dec. 3, 2019.
Prior Publication US 2022/0200001 A1, Jun. 23, 2022
Int. Cl. H01M 4/62 (2006.01); C08G 18/08 (2006.01); C08G 18/62 (2006.01); C08G 18/69 (2006.01); H01G 11/06 (2013.01); H01G 11/38 (2013.01); B82Y 30/00 (2011.01); B82Y 40/00 (2011.01); H01M 4/02 (2006.01); H01M 10/0525 (2010.01)

CPC H01M 4/622 (2013.01) [C08G 18/0876 (2013.01); C08G 18/6204 (2013.01); C08G 18/69 (2013.01); H01G 11/06 (2013.01); H01G 11/38 (2013.01); H01M 4/625 (2013.01); B82Y 30/00 (2013.01); B82Y 40/00 (2013.01); H01M 2004/027 (2013.01); H01M 10/0525 (2013.01); H01M 2300/002 (2013.01)]

8 Claims

1. An electrode binder composition comprising (A) a polyurethane, (B) a fibrous nanocarbon material having an average fiber length of 0.5 μm or more, (C) water, and (D) a cellulose material,

wherein the polyurethane is obtained by reacting together (a) a polyisocyanate, (b) a polyol, (c) a compound having one or more active hydrogen groups and a hydrophilic group, and (d) a chain extender, and

(b) the polyol contains an olefinic polyol having 1.5 or more active hydrogen groups and/or a carbonate diol having less than 6 carbon atoms between carbonate bond chains,

wherein a content ratio of (A) the polyurethane to (B) the fibrous nanocarbon satisfies (A) polyurethane: (B) fibrous nanocarbon=60:40 to 99.6:0.4 (mass ratio), and

wherein the amount of (D) the cellulose material is 5 parts by mass or more and 150 parts by mass or less relative to 100 parts by mass of (B) the fibrous nanocarbon.