Electrode for rechargeable lithium battery, and rechargeable lithium battery including the same

Patent metadata

Field	Value
Publication number	US-11728522-B2
Application number	US-201916460765-A
Country	US
Kind code	B2
Filing date	Jul 2, 2019
Priority date	Jul 3, 2018
Publication date	Aug 15, 2023
Grant date	Aug 15, 2023

Abstract

An electrode for a rechargeable lithium battery includes a current collector and an active material layer on the current collector, wherein the active material layer includes flake-shaped polyethylene particles, and the flake-shaped polyethylene particles have an average particle size (D50) of about 1 μm to about 8 μm. A rechargeable lithium battery includes the electrode including the flake-shaped polyethylene particles.

First claim

What is claimed is:

1. An electrode for a rechargeable lithium battery, comprising:
a current collector, and
an active material layer on the current collector,
wherein the active material layer comprises flake-shaped polyethylene particles,
the flake-shaped polyethylene particles have an average particle size (D50) of 1 μm to 8 μm, and
the flake-shaped polyethylene particles have a ratio of a major axis length to a minor axis length in a range from 2.4 to 4.5.

2. The electrode for a rechargeable lithium battery of claim 1 , wherein the flake-shaped polyethylene particles have an average particle size (D50) of 2 μm to 6 μm.

3. The electrode for a rechargeable lithium battery of claim 1 , wherein the flake-shaped polyethylene particles have a thickness of 0.3 μm to 4 μm.

4. The electrode for a rechargeable lithium battery of claim 1 , wherein the active material layer comprises an active material and further comprises at least one selected from a conductive material and a binder.

5. The electrode for a rechargeable lithium battery of claim 4 , wherein the flake-shaped polyethylene particles are included in an amount of 0.1 wt % to 5 wt % based on a total weight of the active material layer.

6. The electrode for a rechargeable lithium battery of claim 1 , wherein the electrode further comprises a coating layer, and
the flake-shaped polyethylene particles are included in at least one selected from the active material layer and the coating layer.

7. The electrode for a rechargeable lithium battery of claim 6 , wherein the flake-shaped polyethylene particles are included in the coating layer.

8. The electrode for a rechargeable lithium battery of claim 7 , wherein the coating layer further comprises inorganic particles and a binder.

9. The electrode for a rechargeable lithium battery of claim 8 , wherein a weight ratio of the sum of the flake-shaped polyethylene particles and the inorganic particles to the binder is 80:20 to 99:1.

10. The electrode for a rechargeable lithium battery of claim 8 , wherein a weight ratio of the flake-shaped polyethylene particles to the inorganic particles is 95:5 to 10:90.

11. A rechargeable lithium battery comprising the electrode for a rechargeable lithium battery of claim 1 .

Assignees

• Samsung Sdi Co Ltd

Inventors

• Ha Jaehwan
• Kim Kijun
• Yoo Heeeun
• Yoon Yeonhee
• Lee Kyuseo

Classifications

• H01M10/4235 Primary

  Safety or regulating additives or arrangements in electrodes, separators or electrolyte (H01M10/4242 takes precedence) · CPC title

• H01M4/628

  Inhibitors, e.g. gassing inhibitors, corrosion inhibitors · CPC title

• H01M10/0525

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

• H01M2004/021

  Physical characteristics, e.g. porosity, surface area · CPC title

• H01M4/137 Primary

  Electrodes based on electro-active polymers · CPC title