# US 12,119,477 B2 · Method for manufacturing electrode comprising polymeric solid electrolyte and electrode obtained thereby

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- Number: US 12,119,477 B2
- Document ID: US12119477B2
- Status: Granted
- Kind: B2
- Application number: 16/979,635
- Filed: 2019-05-03
- Published: 2021-02-11
- Granted: 2024-10-15
- Earliest claimed: 2018-05-03
- Assignees: LG Energy Solution, Ltd.
- Applicants: LG Chem, Ltd.
- Inventors: Jung-Pil Lee; Ji-Hoon Ryu; Sung-Joong Kang; Jae-Hyun Lee
- Web page: https://patentgrep.com/patent/US12119477B2

## CPC

- H01M 4/0416: {involving impregnation with a solution, dispersion, paste or dry powder (H01M4/0438 takes precedence)}
- H01M 4/0471: {involving thermal treatment, e.g. firing, sintering, backing particulate active material, thermal decomposition, pyrolysis}
- H01M 4/04: Processes of manufacture in general
- H01M 4/0404: {by coating on electrode collectors}
- H01M 4/13: Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M 4/139: Processes of manufacture
- H01M 4/364: {as mixtures}
- H01M 4/622: {being polymers}
- H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
- H01M 10/0565: Polymeric materials, e.g. gel-type or solid-type
- H01M 4/624: {Electric conductive fillers}
- H01M 10/052: Li-accumulators
- H01M 10/4235: {Safety or regulating additives or arrangements in electrodes, separators or electrolyte (H01M10/4242 takes precedence)}
- H01M 2004/021: {Physical characteristics, e.g. porosity, surface area}
- H01M 2300/0065: Solid electrolytes
- H01M 2300/0082: Organic polymers
- Y02E 60/10: Energy storage using batteries
- 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

## Abstract

The present disclosure relates to an electrode for an all solid-state battery and a method for manufacturing the same. The electrode comprises an electrode active material layer, wherein the gaps between the electrode active material particles forming the electrode active material layer are filled with a mixture of a polymeric solid electrolyte and a conductive material. The method for manufacturing the electrode comprises a solvent annealing process, and the contact between the electrode active material particles and the conductive material is improved through the solvent annealing process, thereby improving ion conductivity of the electrode and capacity realization in the battery.

## Claims

### Claim 1

A method for manufacturing an electrode for an all solid-state battery, comprising the steps of:
preparing a slurry for forming an electrode active material layer containing electrode active material particles, a polymeric solid electrolyte and a conductive material;
coating the slurry on at least one surface of a current collector to obtain a preliminary electrode; and
subjecting the preliminary electrode to a solvent annealing process, in which the polymeric solid electrolyte is exposed to a vaporized organic solvent and the vaporized organic solvent infiltrates into the solid electrolyte to cause volumetric swelling of the electrolyte, to obtain an electrode.

### Claim 2 (depends on 1)

The method for manufacturing an electrode for an all solid-state battery according to claim 1, wherein the polymeric solid electrolyte is a solid polymer electrolyte formed by adding a polymer resin to a solvated lithium salt.

### Claim 3 (depends on 1)

The method for manufacturing an electrode for an all solid-state battery according to claim 1, wherein the solvent annealing process comprises the steps of:
introducing the preliminary electrode to a sealed space;
filling the sealed space with the vaporized organic solvent; and
allowing the preliminary electrode to stand in the sealed space filled with the vaporized organic solvent.

### Claim 4 (depends on 1)

The method for manufacturing an electrode for an all solid-state battery according to claim 1, wherein the solvent annealing process is carried out for 1-72 hours.

### Claim 5 (depends on 3)

The method for manufacturing an electrode for an all solid-state battery according to claim 3, wherein the solvent comprises at least one of an aprotic solvent selected from N,N-dimethylacetamide (DMAc), N-methyl pyrrolidone (NMP), dimethyl sulfoxide (DMSO) or N,N-dimethylformamide (DMF); or a protic solvent selected from water, methanol, ethanol, propanol, n-butanol, isopropyl alcohol, decalin, acetic acid or glycerol.

### Claim 6 (depends on 1)

The method for manufacturing an electrode for an all solid-state battery according to claim 1, wherein the solvent annealing process is carried out at a temperature of 15-200° C.

### Claim 7 (depends on 1)

The method for manufacturing an electrode for an all solid-state battery according to claim 1, wherein the polymeric solid electrolyte is swelled at a swelling degree of larger than 1% to 1,000% after the solvent annealing process.

### Claim 8 (depends on 1)

The method for manufacturing an electrode for an all solid-state battery according to claim 1, further comprising compressing the electrode after the solvent annealing process.