US 12,218,342 B2
Energy storage device
Tomoya Tsuchikawa, Kyoto (JP)
Assigned to GS Yuasa International Ltd., Kyoto (JP)
Appl. No. 17/598,506
Filed by GS Yuasa International Ltd., Kyoto (JP)
PCT Filed Mar. 23, 2020, PCT No. PCT/JP2020/012642
§ 371(c)(1), (2) Date Sep. 27, 2021,
PCT Pub. No. WO2020/203400, PCT Pub. Date Oct. 8, 2020.
Claims priority of application No. 2019-068528 (JP), filed on Mar. 29, 2019.
Prior Publication US 2022/0190321 A1, Jun. 16, 2022
Int. Cl. H01M 4/36 (2006.01); H01G 11/24 (2013.01); H01G 11/52 (2013.01); H01M 50/431 (2021.01); H01M 50/443 (2021.01); H01M 50/489 (2021.01); H01M 4/02 (2006.01)
CPC H01M 4/364 (2013.01) [H01G 11/24 (2013.01); H01G 11/52 (2013.01); H01M 50/431 (2021.01); H01M 50/443 (2021.01); H01M 50/489 (2021.01); H01M 2004/021 (2013.01)] 12 Claims
OG exemplary drawing
 
1. An energy storage device comprising:
an electrode having a mixture layer containing active material particles; and
a separator having an inorganic layer facing the mixture layer, the inorganic layer containing inorganic particles,
wherein the active material particles have two or more peaks in a volume-based particle size distribution, and
an average particle diameter of the inorganic particles is 1.2 μm or less.