# US 12,002,944 B2 · Method for manufacturing electrode comprising polymeric solid electrolyte and electrode obtained thereby

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- Number: US 12,002,944 B2
- Document ID: US12002944B2
- Status: Granted
- Kind: B2
- Application number: 16/980,056
- Filed: 2019-05-03
- Published: 2021-01-21
- Granted: 2024-06-04
- Earliest claimed: 2018-05-03
- Assignees: LG Energy Solution, Ltd.
- Applicants: LG Chem, Ltd.
- Inventors: Jung-Pil Lee; Ji-Hee Ahn; Sung-Joong Kang; Jae-Hyun Lee
- Web page: https://patentgrep.com/patent/US12002944B2

## CPC

- H01M 4/362: {Composites}
- H01M 4/04: Processes of manufacture in general
- H01M 4/0404: {by coating on electrode collectors}
- H01M 4/0471: {involving thermal treatment, e.g. firing, sintering, backing particulate active material, thermal decomposition, pyrolysis}
- 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 4/62: Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M 4/628: {Inhibitors, e.g. gassing inhibitors, corrosion inhibitors}
- 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 10/4235: {Safety or regulating additives or arrangements in electrodes, separators or electrolyte (H01M10/4242 takes precedence)}
- H01M 4/0416: {involving impregnation with a solution, dispersion, paste or dry powder (H01M4/0438 takes precedence)}
- H01M 4/0492: {Chemical attack of the support material}
- 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 4/622: {being polymers}
- H01M 4/625: {Carbon or graphite}
- H01M 2004/021: {Physical characteristics, e.g. porosity, surface area}
- 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, oxidation-/reduction-improving additive and a conductive material. The method for manufacturing the electrode comprises a solvent annealing process, and the dissociation degree and transportability of the oxidation-/reduction-improving additive are increased through the solvent annealing process, thereby improving the life characteristics of a 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, wherein the slurry comprises a) electrode active material particles, b) a polymeric solid electrolyte, c) a conductive material and d) at least one additive selected from an oxidation-improving additive or a reduction-improving additives;
coating the slurry on at least one surface of a current collector to obtain a preliminary electrode;
introducing the preliminary electrode to a sealed space;
filling the sealed space with a solvent that is vaporized; and
allowing the preliminary electrode to stand in the sealed space filled with the vaporized solvent for annealing to obtain the 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 annealing is carried out for 1-72 hours.

### Claim 4 (depends on 1)

The method for manufacturing an electrode for an all solid-state battery according to claim 1, wherein the solvent is at least one of N,N-dimethylacetamide (DMAc), N-methyl pyrrolidone (NMP), dimethyl sulfoxide (DMSO) N,N-dimethylformamide (DMF), water, methanol, ethanol, propanol, n-butanol, isopropyl alcohol, decalin, acetic acid or glycerol.

### Claim 5 (depends on 1)

The method for manufacturing an electrode for an all solid-state battery according to claim 1, wherein the polymeric solid electrolyte undergoes a volumetric swelling by an infiltration of the vaporized solvent in the annealing.

### Claim 6 (depends on 1)

The method for manufacturing an electrode for an all solid-state battery according to claim 1, wherein the annealing 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 annealing.