# US 10,122,019 B2 · Ionic liquid filled porous carbon anode active material and method for manufacturing the same

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

- Number: US 10,122,019 B2
- Document ID: US10122019B2
- Status: Granted
- Kind: B2
- Application number: 15/238,040
- Filed: 2016-08-16
- Published: 2017-03-02
- Granted: 2018-11-06
- Earliest claimed: 2015-08-31
- Assignees: Toyota Jidosha Kabushiki Kaisha
- Applicants: Toyota Jidosha Kabushiki Kaisha
- Inventors: Hiroyuki Yamaguchi; Shinji Nakanishi
- Web page: https://patentgrep.com/patent/US10122019B2

## CPC

- H01M 4/587: for inserting or intercalating light metals
- H01M 4/043: {involving compressing or compaction}
- H01M 4/133: Electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
- H01M 4/1393: of electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
- H01M 4/362: {Composites}
- H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
- H01M 10/058: Construction or manufacture
- H01M 10/052: Li-accumulators
- H01M 10/0562: Solid materials
- H01M 2004/027: {Negative 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
- 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

Provided is a method for manufacturing an anode active material particle having good lithium ion conducting property and good formability. The method for manufacturing an anode active material includes a first step of making a carbon particle with pores have contact with an ionic liquid having a lithium ion conducting property, and making the ionic liquid flow into the pores, and a second step of washing the carbon particle after the first step, while leaving the ion liquid inside the pores.

## Claims

### Claim 1

A method for manufacturing an anode active material particle comprising:
a first step of contacting a carbon particle having pores with an ionic liquid in which a lithium salt is dissolved, and making the ionic liquid flow into the pores; and
a second step of washing the carbon particle with an organic solvent after the first step, while leaving the ionic liquid inside the pores.

### Claim 2 (depends on 1)

The method according to claim 1, wherein in the first step, a decompression in a system is carried out with the carbon particle immersed in the ionic liquid, for discharging a gas existing inside the pores to the outside of the pores and making the ionic liquid flow into the pores.

### Claim 3 (depends on 1)

The method according to claim 1, wherein the ionic liquid includes a TFSA anion.

### Claim 4 (depends on 1)

The method according to claim 1, wherein the carbon particle is a graphite particle.

### Claim 5 (depends on 4)

The method according to claim 4, wherein the graphite particle is a natural graphite particle.

### Claim 6 (depends on 1)

The method according to claim 1, wherein a particle diameter of the carbon particle is in the range of from 0.1 μm to 50 μm.

### Claim 7 (depends on 6)

The method according to claim 6, wherein a specific surface area of the carbon particle is more than 0.5 m2/g to 10 m2/g.

### Claim 8 (depends on 7)

The method according to claim 7, wherein a specific surface area of the anode active material particle is in the range of from 0.5 m2/g to 2 m2/g, and smaller than the specific surface area of the carbon particle.

### Claim 9 (depends on 1)

A method for manufacturing an anode comprising a step of carrying out a pressure forming on an anode mixture including the anode active material particle manufactured by the method according to claim 1.

### Claim 10 (depends on 9)

A method for manufacturing a lithium battery, the method comprising:
arranging the anode manufactured by the method according to claim 9 in a manner that the anode has contact with one surface of an inorganic solid electrolyte layer; and
arranging a cathode on the other surface of the inorganic solid electrolyte layer.