Patent ID: 11923510
Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 13:
14. A method for manufacturing a solid-state battery that includes a positive electrode layer and a negative electrode layer, the method comprising at least one of:
forming the positive electrode layer with a first active powder material mixture produced by mixing powders of a positive-electrode active material, a plurality of first solid electrolyte particles each having a particle diameter larger than 300 nm, and a plurality of second solid electrolyte particles each having a particle diameter of 300 nm or less; and
forming the negative electrode layer with a second active powder material mixture produced by mixing powders of a negative-electrode active material, a plurality of first solid electrolyte particles each having a particle diameter of larger than 300 nm, and a plurality of second solid electrolyte particles each having a particle diameter of 300 nm or less,
wherein the method further comprises:
pressing one of the positive electrode layer and the negative electrode layer and the other of the positive electrode layer and the negative electrode layer in a stacked formation,
wherein the pressing includes forming a porous solid electrolyde by a plurality of fibrous solid electrolytes in which at least some parts of the plurality of second solid electrolyte particles are necked with each other and form fiber shapes due to springback, and

wherein the forming of the first active powder material mixture and the second active powder material mixture comprises mixing the plurality of first solid electrolyte particles and the plurality of second solid electrolyte particles so that a volume fraction of the plurality of second solid electrolyte particles is 5% to 90% of a total volume of the plurality of first solid electrolyte particles and the plurality of second solid electrolyte particles.