US 12,278,340 B2
All-solid-state battery and method of producing all-solid-state battery
Akihiro Yoshizawa, Wako (JP); and Ushio Harada, Wako (JP)
Assigned to HONDA MOTOR CO., LTD., Tokyo (JP)
Filed by HONDA MOTOR CO., LTD., Tokyo (JP)
Filed on Feb. 8, 2022, as Appl. No. 17/666,595.
Claims priority of application No. 2021-046042 (JP), filed on Mar. 19, 2021.
Prior Publication US 2022/0302504 A1, Sep. 22, 2022
Int. Cl. H01M 10/0585 (2010.01); H01M 4/02 (2006.01); H01M 10/0525 (2010.01); H01M 10/0562 (2010.01)
CPC H01M 10/0585 (2013.01) [H01M 10/0525 (2013.01); H01M 10/0562 (2013.01); H01M 2004/021 (2013.01)] 16 Claims
OG exemplary drawing
 
1. An all-solid-state battery, comprising:
a positive electrode in which a first current collector layer and a first active material layer containing at least a solid electrolyte are laminated;
a negative electrode in which a second current collector layer and a second active material layer containing at least a solid electrolyte are laminated; and
a first solid electrolyte layer disposed between the first active material layer and the second active material layer,
wherein, in a direction perpendicular to a lamination direction, an area of the second active material layer in the negative electrode is larger than an area of the first active material layer in the positive electrode,
wherein, in a direction perpendicular to the lamination direction, an area of the first solid electrolyte layer is larger than an area of the first active material layer in the positive electrode, and
wherein a porosity n1am of the first active material layer is 5% or less,
the all-solid-state battery further comprising a second solid electrolyte layer positioned between the first active material layer and the first solid electrolyte layer,
wherein a porosity n2se of the second solid electrolyte layer is smaller than the porosity n1se of the first solid electrolyte layer, and
wherein the porosity n1se of the first solid electrolyte layer, the porosity n1am of the first active material layer and the porosity n2se of the second solid electrolyte layer satisfy the relationship of n1se>n1am≥n2se.