Electrode for all solid-state battery including solid electrolyte

Patent metadata

Field	Value
Publication number	US-12113186-B2
Application number	US-201816482542-A
Country	US
Kind code	B2
Filing date	Sep 11, 2018
Priority date	Sep 13, 2017
Publication date	Oct 8, 2024
Grant date	Oct 8, 2024

Abstract

An electrode for an all solid-state battery including an electrode current collector, and an electrode active material layer formed on at least one surface of the electrode current collector, wherein the electrode active material layer includes electrode active material particles, a solid electrolyte coated on at least part of surface of the electrode active material particles to connect the electrode active material particles to each other, and a linear structure distributed between the electrode active material particles.

First claim

What is claimed is:

1. An electrode for an all solid-state battery, comprising:
an electrode current collector; and
an electrode active material layer formed on at least one surface of the electrode current collector,
wherein the electrode active material layer comprises
electrode active material particles,
a solid electrolyte coated on at least part of a surface of the electrode active material particles to connect the electrode active material particles to each other, wherein the solid electrolyte consists of a polymer-based solid electrolyte formed by adding polymer resin to a solvated lithium salt, comprising polyethyleneoxide and lithium salt,
a linear structure distributed between the electrode active material particles,
wherein the linear structure comprises halloysite nanotube,
wherein microporous channels are formed between the electrode active material particles and the linear structure,
wherein the microporous channels are in communication with the outside of the electrode to provide a gas flow path, through which gas within the electrode can be discharged out of the electrode,
wherein the linear structure is 3 μm to 100 μm in length;
wherein the linear structure has an aspect ratio of 3 or more, and
wherein the linear structure exhibits a tensile strength in a range of 10 MPa to 100 MPa.

2. The electrode for an all solid-state battery according to claim 1 , wherein the electrode active material layer further comprises a conductive material that is distributed on the surface of the electrode active material particles, and inside of the solid electrolyte or on a surface of the solid electrolyte.

3. The electrode for an all solid-state battery according to claim 1 , wherein the linear structure is 5 μm to 50 μm long.

4. The electrode for an all solid-state battery according to claim 1 , wherein the linear structure has a diameter of 30 nm to 10 μm.

5. The electrode for an all solid-state battery according to claim 1 , wherein the linear structure consists of halloysite nanotube.

6. The electrode for an all solid-state battery according to claim 1 , wherein the polymer-based solid electrolyte is not a gel electrolyte.

7. The electrode for an all solid-state battery according to claim 1 , wherein the linear structure does not deform in an electrode rolling process and maintains the aspect ratio.

8. An all solid-state battery, comprising: a positive electrode; a negative electrode; and a solid electrolyte layer interposed between the positive electrode and the negative electrode, wherein at least one of the positive electrode and the negative electrode is the electrode according to claim 1 .

9. An all-solid state battery comprising the electrode according to claim 1 .

Assignees

• Lg Chemical Ltd
• Lg Energy Solution Ltd

Inventors

• Lee Jung-Pil
• Kim Ji-Young
• Kim Hyo-Sik
• Mok Eun-Kyung
• Woo Seung-He
• Jung Hye-Ri

Classifications

• H01M4/62

  Selection of inactive substances as ingredients for active masses, e.g. binders, fillers · CPC title

• H01M4/366 Primary

  as layered products · CPC title

• H01M2300/0085

  Immobilising or gelification of electrolyte · CPC title

• H01M2300/0082

  Organic polymers · CPC title

• H01M2300/0068

  inorganic · CPC title