Patent ID: 11876172
Assignee: HITACHI ZOSEN CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 0:
1. An all-solid battery comprising:
at least a unit cell including a positive electrode, a negative electrode, and an ion-conductive solid electrolyte layer interposed between the positive electrode and the negative electrode,
wherein the all-solid battery is a solid lithium-ion battery,
wherein the positive electrode includes a positive electrode active material and an inorganic solid electrolyte,
wherein the negative electrode includes a negative electrode active material and an inorganic solid electrolyte,
wherein the solid electrolyte layer includes an inorganic solid electrolyte,
wherein the positive electrode active material includes a lithium-containing oxide including at least one selected from the group consisting of Co, Ni, and Mn,
wherein the negative electrode active material includes at least one selected from the group consisting of a material structured to intercalate and deintercalated lithium ions, and a material containing Si,
wherein each of the inorganic solid electrolyte in the positive electrode and the negative electrode includes plastically deformed particles of a sulfide-based solid electrolyte at a pressure of 800 MPa or more,
wherein the inorganic solid electrolyte in the solid electrolyte layer includes plastically deformed particles of a sulfide based solid electrolyte at a pressure of 800M Pa or more, and
wherein a part of the plastically deformed particles in the solid electrolyte layer is deformed together with a part of the plastically deformed particles included in each of the inorganic solid electrolyte in the positive electrode and the negative electrode
such that a resistance R1 of the unit cell when a pressure applied in a thickness direction of the unit cell is 100 kPa as small as 90 Ωcm2 or less, and a resistance R2 is a resistance of the unit cell when a pressure applied in the thickness direction is 60 MPa, produce an increase rate represented by (R1−R2)/R2×100 of 10% or less, and
wherein a pressure applied to the solid electrolyte layer is 100 kPa or less in the all-solid battery.