# US 10,873,077 B2 · Method for manufacturing lithium ion battery

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 10,873,077 B2
- Document ID: US10873077B2
- Status: Granted
- Kind: B2
- Application number: 16/369,186
- Filed: 2019-03-29
- Published: 2019-07-25
- Granted: 2020-12-22
- Earliest claimed: 2016-03-23
- Assignees: Toyota Jidosha Kabushiki Kaisha
- Applicants: Toyota Jidosha Kabushiki Kaisha
- Inventors: Yohei Shindo; Yoshitomo Takebayashi; Sho Ando; Yusuke Shimo
- Web page: https://patentgrep.com/patent/US10873077B2

## CPC

- H01M 4/366: {as layered products}
- H01B 1/08: oxides
- H01M 4/131: Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
- H01M 4/485: of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy (H01M4/505, H01M4/525 take precedence)
- 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 4/625: {Carbon or graphite}
- H01M 4/628: {Inhibitors, e.g. gassing inhibitors, corrosion inhibitors}
- H01M 4/663: {containing carbon or carbonaceous materials as conductive part, e.g. graphite, carbon fibres}
- H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
- H01M 2004/028: {Positive electrodes}
- Y02E 60/10: Energy storage using batteries
- Y02P 70/50: Manufacturing or production processes characterised by the final manufactured product
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01B: CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES (selection for magnetic properties H01F1/00; waveguides H01P {; printed circuits H05K})
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

## Abstract

A lithium ion secondary battery is disclosed that can inhibit generation of gas due to decomposition of a non-aqueous electrolyte solution. The lithium ion battery includes a cathode, a non-aqueous electrolyte solution and an anode, wherein the cathode includes a conductive material, a layered niobium-containing oxide that coats a surface of the conductive material, and a lithium-containing oxide active material having an upper-limit potential to a redox potential of metal lithium of no less than 4.5 V (vs. Li/Li+).

## Claims

### Claim 1

A method for manufacturing a lithium ion battery comprising:
coating only a surface of a conductive material with a layered niobium-containing oxide to form a complex;
mixing the complex and a lithium-containing oxide active material having an upper-limit potential to a redox potential of metal lithium of no less than 4.5 V (vs. Li/Li+) to obtain a cathode mixture;
manufacturing a cathode from the cathode mixture; and
manufacturing a power generation element from the cathode, a non-aqueous electrolyte solution and an anode.

### Claim 2 (depends on 1)

The method according to claim 1, wherein the coating of the layered niobium-containing oxide is by an atomic layer deposition (ALD).

### Claim 3 (depends on 1)

The method according to claim 1, wherein said layered niobium-containing oxide has a thickness of in the range of no less than 0.4 nm.

### Claim 4 (depends on 1)

The method according to claim 1, wherein said layered niobium-containing oxide has a thickness in the range of 0.4 nm to 5 nm.

### Claim 5 (depends on 1)

The method according to claim 1, wherein the conductive material consists of a carbon material.

### Claim 6 (depends on 1)

The method according to claim 1, wherein said niobium-containing oxide includes niobium oxide and lithium niobate.

### Claim 7 (depends on 1)

The method accordingly to claim 1, wherein said lithium-containing oxide includes a lithium nickel manganese composite oxide.

### Claim 8 (depends on 1)

The method according to claim 1, wherein said conductive material is in a particulate form having a particle diameter of 5 nm to 100 nm and an aspect ratio of less than 2.

### Claim 9 (depends on 1)

The method according to claim 1, wherein said conductive material is in a fibrous form having a fiber diameter of 10 nm to 1 μm and has an aspect ratio of no less than 20.

### Claim 10 (depends on 1)

The method according to claim 1, wherein in the coating, the surface of the conductive material is continuously coated with the layered niobium-containing oxide along the surface shape of the conductive material to form the complex.