METHOD FOR MANUFACTURING ELECTRODE INCLUDING POLYMER ELECTROLYTE AND ELECTRODE OBTAINED THEREBY

• US 20190319258A1
• Filed: 03/16/2018
• Published: 10/17/2019
• Est. Priority Date: 03/16/2017
• Status: Active Grant

• Current Assignee: LG Energy Solution Limited (LG Corporation)
• Original Assignee: LG Chem Limited (LG Corporation)
• Inventors: LEE, Jung-Pil, KIM, Eun-Bee, KIM, Ji-Young, MOK, Eun-Kyung, UHM, In-Sung, JUNG, Hye-Ri
• Granted Patent: US 10,868,296 B2
• Time in Patent Office: Days
• CPC Class Codes: B05B 5/025 Discharge apparatus, e.g. electrostatic spray guns
• CPC Class Codes: H01M 10/0525 Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
• CPC Class Codes: H01M 10/0565 Polymeric materials, e.g. gel-type or solid-type
• CPC Class Codes: H01M 2300/0082 Organic polymers
• CPC Class Codes: H01M 2300/0085 Immobilising or gelification of electrolyte
• CPC Class Codes: H01M 4/0404 by coating on electrode collectors
• CPC Class Codes: H01M 4/0416 involving impregnation with a solution, dispersion, paste or dry powder H01M4/0438 takes precedence
• CPC Class Codes: H01M 4/0419 involving spraying
• CPC Class Codes: H01M 4/13 Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
• CPC Class Codes: H01M 4/131 Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
• CPC Class Codes: H01M 4/137 Electrodes based on electro-active polymers
• CPC Class Codes: H01M 4/139 Processes of manufacture
• CPC Class Codes: H01M 4/1391 of electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
• CPC Class Codes: H01M 4/366 as layered products
• CPC Class Codes: 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
• CPC Class Codes: H01M 4/62 Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
• CPC Class Codes: H01M 4/621 Binders
• CPC Class Codes: H01M 4/622 being polymers
• CPC Class Codes: H01M 4/624 Electric conductive fillers
• CPC Class Codes: H01M 4/625 Carbon or graphite
• CPC Class Codes: Y02E 60/10 : Energy storage using batteries

Abstract

A method for manufacturing an electrode for a solid state battery and an electrode obtained thereby. In the electrode, the electrode active material particles are at least partially surface-coated with a first coating layer including a mixture of (a) a binder, a first polymer electrolyte or both a binder and a first polymer electrolyte, and (b) a conductive material. In addition, the first coating layer in the electrode is formed by an electrospraying and/or electrospinning process.

Claims

1. An electrode for a solid state battery which comprises

a plurality of electrode active material particles;

a binder resin, a first polymer electrolyte or a combination thereof;

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 (a) the binder resin or the first polymer electrolyte or the combination thereof, and (b) the conductive material,

the second polymer electrolyte at least partially covers the surface of the first coating layer, the surface of the electrode active material 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 binder resin, 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 is present, and 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 present, and wherein the first polymer electrolyte is different from the second polymer electrolyte.

4. A method for manufacturing an electrode for a solid state battery, comprising the steps of:

(S10) preparing a slurry for forming an electrode comprising (a) a binder resin, a first polymer electrolyte, or a combination thereof, (b) a conductive material and (c) a plurality of electrode active material particles;

(S20) coating a surface of a current collector with the slurry; and

(S30) impregnating the product of (S20) with a second polymer electrolyte.

5. The method for manufacturing an electrode for a solid state battery according to claim 4, wherein the slurry includes the first polymer electrolyte and a product of (S20) comprises the electrode active material particles at least partially surface-coated with the first polymer electrolyte.

6. The method for manufacturing an electrode for a solid state battery according to claim 4, wherein the slurry includes the first polymer electrolyte, and wherein said method further comprises step (S40) of drying a product obtained from (S30), wherein a product of (S40) is an electrode in which the plurality of 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.

7. The method for manufacturing an electrode for a solid state battery according to claim 4, wherein step (S20) is carried out by an electrospraying process.