US 12,334,495 B2
Slurry composition for all-solid-state secondary battery, solid electrolyte-containing layer, all-solid-state secondary battery, and method of producing slurry composition for all-solid-state secondary battery
Yusaku Matsuo, Tokyo (JP); and Yasuhiro Wakizaka, Tokyo (JP)
Assigned to ZEON CORPORATION, Tokyo (JP)
Appl. No. 17/595,563
Filed by ZEON CORPORATION, Tokyo (JP)
PCT Filed May 15, 2020, PCT No. PCT/JP2020/019520
§ 371(c)(1), (2) Date Nov. 19, 2021,
PCT Pub. No. WO2020/241322, PCT Pub. Date Dec. 3, 2020.
Claims priority of application No. 2019-102394 (JP), filed on May 31, 2019.
Prior Publication US 2022/0263112 A1, Aug. 18, 2022
Int. Cl. H01M 10/056 (2010.01); H01M 4/13 (2010.01); H01M 4/139 (2010.01); H01M 4/62 (2006.01); H01M 50/414 (2021.01); H01M 50/431 (2021.01); H01M 50/443 (2021.01)
CPC H01M 10/056 (2013.01) [H01M 4/13 (2013.01); H01M 4/139 (2013.01); H01M 4/62 (2013.01); H01M 4/622 (2013.01); H01M 50/414 (2021.01); H01M 50/431 (2021.01); H01M 50/443 (2021.01); H01M 2300/0065 (2013.01); H01M 2300/0068 (2013.01); H01M 2300/0071 (2013.01); H01M 2300/0091 (2013.01)] 8 Claims
 
1. A slurry composition for an all-solid-state secondary battery comprising a solid electrolyte, a polymer, and a solvent, wherein
a ratio of fineness of grind of the solid electrolyte, as measured by a grind gauge method based on JIS K5600-2-5:1999, relative to an average primary particle diameter of the solid electrolyte is more than 1 and less than 30,
the solid electrolyte is present as a plurality of solid electrolyte particles, and some of the solid electrolyte particles are aggregated and present as aggregates,
the average primary particle diameter of the solid electrolyte is determined by observing 100 primary particles, each being a solid electrolyte particle existing independently, among the plurality of solid electrolyte particles under an electron microscope, measuring a particle diameter of each of the primary particles in accordance with JIS Z8827-1:2008, and calculating the arithmetic mean of the measured values.