Method for manufacturing electrode comprising polymeric solid electrolyte and electrode obtained thereby

Patent metadata

Field	Value
Publication number	US-12119477-B2
Application number	US-201916979635-A
Country	US
Kind code	B2
Filing date	May 3, 2019
Priority date	May 3, 2018
Publication date	Oct 15, 2024
Grant date	Oct 15, 2024

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.

First claim

What is claimed is:

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.

2. 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.

3. 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.

4. 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.

5. 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.

6. 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.

7. 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.

8. 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.

Assignees

• Lg Chemical Ltd
• Lg Energy Solution Ltd

Inventors

• Lee Jung-Pil
• Ryu Ji-Hoon
• Kang Sung-Joong
• Lee Jae-Hyun

Classifications

• H01M2300/0082

  Organic polymers · CPC title

• H01M10/0565

  Polymeric materials, e.g. gel-type or solid-type · CPC title

• H01M10/0525

  Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title

• H01M4/139

  Processes of manufacture · CPC title

• H01M4/13 Primary

  Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof · CPC title