# US 2018/0026301 A1 · All solid state battery

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- Number: US 2018/0026301 A1
- Document ID: US20180026301A1
- Status: Published application
- Kind: A1
- Application number: 15/621,556
- Filed: 2017-06-13
- Published: 2018-01-25
- Earliest claimed: 2016-07-22
- Assignees: Toyota Jidosha Kabushiki Kaisha
- Applicants: Toyota Jidosha Kabushiki Kaisha
- Inventors: Hideyo EBISUZAKI; Hideaki NISHIMURA
- Web page: https://patentgrep.com/patent/US20180026301A1

## CPC

- H01M 10/0562: Solid materials
- H01M 4/386: {Silicon or alloys based on silicon}
- H01M 4/387: {Tin or alloys based on tin}
- H01M 4/505: of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
- H01M 4/525: of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
- H01M 4/5825: {Oxygenated metallic salts or polyanionic structures, e.g. borates, phosphates, silicates, olivines}
- H01M 4/587: for inserting or intercalating light metals
- H01M 4/623: {fluorinated polymers}
- H01M 10/0481: {Compression means other than compression means for stacks of electrodes and separators}
- H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
- H01M 10/4235: {Safety or regulating additives or arrangements in electrodes, separators or electrolyte (H01M10/4242 takes precedence)}
- H01C 7/02: having positive temperature coefficient
- H01M 2200/106: PTC
- H01M 2220/20: Batteries in motive systems, e.g. vehicle, ship, plane
- H01M 2300/0071: Oxides
- Y02E 60/10: Energy storage using batteries
- Y02T 10/70: Energy storage systems for electromobility, e.g. batteries
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01C: RESISTORS
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

A main object of the present disclosure is to provide an all solid state battery in which the decrease of electron resistance due to the restraining pressure is inhibited. The present disclosure achieves the object by providing an all solid state battery comprising a laminated body provided with a cathode active material layer, a solid electrolyte layer, and an anode active material layer in this order, and a restraining member that applies a restraining pressure to the laminated body in a laminated direction, wherein a PTC layer containing a conductive material, an insulating inorganic substance, and a polymer, is provided in at least one of a position between the cathode active material layer and a cathode current collecting layer for collecting electrons of the cathode active material layer, and a position between the anode active material layer and an anode current collecting layer for collecting electrons of the anode active material layer, and the content of the insulating inorganic substance in the PTC layer is 50 volume % or more.

## Claims

### Claim 1

An all solid state battery comprising a laminated body provided with a cathode active material layer, a solid electrolyte layer, and an anode active material layer in this order, and a restraining member that applies a restraining pressure to the laminated body in a laminated direction, wherein
a PTC layer containing a conductive material, an insulating inorganic substance, and a polymer, is provided in at least one of a position between the cathode active material layer and a cathode current collecting layer for collecting electrons of the cathode active material layer, and a position between the anode active material layer and an anode current collecting layer for collecting electrons of the anode active material layer, and
the content of the insulating inorganic substance in the PTC layer is 50 volume % or more.

### Claim 2 (depends on 1)

The all solid state battery according to claim 1, wherein the content of the insulating inorganic substance in the PTC layer is 85 volume % or less.

### Claim 3 (depends on 1)

The all solid state battery according to claim 1, wherein the insulating inorganic substance is a metal oxide.

### Claim 4 (depends on 1)

The all solid state battery according to claim 1, wherein the conductive material is carbon black.