US 12,191,446 B2
Binder composition for all-solid-state secondary battery
Yusaku Matsuo, Tokyo (JP); and Kenya Sonobe, Tokyo (JP)
Assigned to ZEON CORPORATION, Tokyo (JP)
Appl. No. 17/413,949
Filed by ZEON CORPORATION, Tokyo (JP)
PCT Filed Dec. 5, 2019, PCT No. PCT/JP2019/047714
§ 371(c)(1), (2) Date Jun. 15, 2021,
PCT Pub. No. WO2020/137434, PCT Pub. Date Jul. 2, 2020.
Claims priority of application No. 2018-248081 (JP), filed on Dec. 28, 2018.
Prior Publication US 2022/0045360 A1, Feb. 10, 2022
Int. Cl. H01M 10/0565 (2010.01); C08F 220/18 (2006.01); C08K 5/134 (2006.01); C08K 5/375 (2006.01)
CPC H01M 10/0565 (2013.01) [C08F 220/1804 (2020.02); C08K 5/134 (2013.01); C08K 5/375 (2013.01); H01M 2300/0082 (2013.01)] 12 Claims
 
1. A binder composition for an all-solid-state secondary battery comprising a polymer, an anti-aging agent, and an organic solvent, wherein
the polymer includes a (meth)acrylic acid ester monomer unit in a proportion of not less than 25 mass % and not more than 95 mass % and a hydrophobic monomer unit in a proportion of not less than 3 mass % and not more than 15 mass %, and has a gel content of 50 mass % or less, and
the anti-aging agent is contained in an amount of not less than 0.005 parts by mass and not more than 0.5 parts by mass per 100 parts by mass of the polymer.
 
10. A solid electrolyte layer for an all-solid-state secondary battery formed using a slurry composition for an all-solid-state secondary battery solid electrolyte layer comprising a binder composition for an all-solid-state secondary battery; and a solid electrolyte,
wherein the binder composition for an all-solid-state secondary battery comprises a polymer, an anti-aging agent, and an organic solvent,
wherein the polymer includes a (meth)acrylic acid ester monomer unit in a proportion of not less than 25 mass % and not more than 95 mass % and a hydrophobic monomer unit, and has a gel content of 50 mass % or less, and
wherein the anti-aging agent is contained in an amount of not less than 0.005 parts by mass and not more than 0.5 parts by mass per 100 parts by mass of the polymer.