Method for manufacturing electrode including polymer electrolyte and electrode obtained thereby

Patent metadata

Field	Value
Publication number	US-10714743-B2
Application number	US-201816312233-A
Country	US
Kind code	B2
Filing date	Mar 6, 2018
Priority date	Mar 6, 2017
Publication date	Jul 14, 2020
Grant date	Jul 14, 2020

Abstract

The present disclosure relates to a method for manufacturing an electrode including a polymer electrolyte and an electrode obtained thereby. Particularly, the present disclosure relates to an electrode for a wide voltage battery which has improved reactivity on the surface of the electrode active material. The electrode provides an increased reactive site between an electrode active material and a polymer electrolyte and an improved ratio of the amount of active material in the electrode, and thus can provide a battery with improved energy density.

First claim

What is claimed is:

1. An electrode for a solid state battery, comprising:
a plurality of electrode active material particles;
a first polymer electrolyte;
a second polymer electrolyte; and
a conductive material,
wherein the electrode active material particles are at least partially surface-coated with a first coating layer comprising a mixture of the first polymer electrolyte and the conductive material,
the second polymer electrolyte at least partially covers the surface of the first coating layer, the surface of the particles or both the surface of the first coating layer and the surface of the electrode active material particles, and
the electrode active material particles are bound to each other by at least one of the first polymer electrolyte and the second polymer electrolyte to form an integrated structure.

2. The electrode for a solid state battery according to claim 1 , wherein the first polymer electrolyte and the second electrolyte are the same or different.

3. The electrode for a solid state battery according to claim 1 , wherein the first polymer electrolyte is different from the second polymer electrolyte.

4. The electrode for a solid state battery according to claim 1 , wherein the first coating layer further comprises at least one additive selected from the group consisting of an oxidation stabilizer additive, a reduction stabilizer additive, a flame retardant, a heat stabilizer and an anti-fogging agent.

5. An electrochemical device comprising the electrode for a solid state battery according to claim 1 .

6. A method for manufacturing an electrode for a solid state battery, comprising the steps of:
(S 10 ) preparing a first slurry comprising a first mixture containing a first polymer electrolyte, a conductive material and a plurality of electrode active material particles;
(S 20 ) coating a surface of a current collector with the first slurry;
(S 30 ) impregnating the product of (S 20 ) with a second slurry comprising a second polymer electrolyte, and
(S 40 ) drying a product obtained from (S 30 ), wherein a product of (S 40 ) is an electrode in which the electrode active material particles are bound to each oother by at least one of the first polymer electrolyte and the second plymer electrolyte to form an intergrated structure,
wherein a product of (S 20 ) comprises the electrode active material particles at least partially surface-coated with the first ploymer electrolyte.

7. The method for manufacturing an electrode for a solid state battery according to claim 5 , wherein the first mixture further comprises at least one additive selected from the group consisting of an oxidation stabilizer additive, a reduction stabilizer additive, a flame retardant, a heat stabilizer and an anti-fogging agent.

Assignees

• Lg Chemical Ltd

Inventors

• Lee Jung-Pil
• Han Hyea-Eun
• Kim Eun-Bee
• Kim Ji-Young
• Mok Eun-Kyung
• Jung Hye-Ri

Classifications

• H01M4/624

  Electric conductive fillers · CPC title

• H01M4/366 Primary

  as layered products · CPC title

• H01M4/13 Primary

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

• H01M4/0471

  involving thermal treatment, e.g. firing, sintering, backing particulate active material, thermal decomposition, pyrolysis · CPC title

• H01M4/139

  Processes of manufacture · CPC title