Electrode components with laser induced surface modified current collectors and methods of making the same

Patent metadata

Field	Value
Publication number	US-11984599-B2
Application number	US-201916698303-A
Country	US
Kind code	B2
Filing date	Nov 27, 2019
Priority date	Nov 27, 2019
Publication date	May 14, 2024
Grant date	May 14, 2024

Abstract

An electrode component for an electrochemical cell is provided herein. The electrode component includes a current collector having a first surface, a metal oxide layer disposed on the first surface of the current collector, and a lithium-containing layer bonded to the first surface of the current collector. The metal oxide layer includes a plurality of features. A method for manufacturing such an electrode component is also provided herein. The method includes directing a laser beam toward the first surface of the current collector in the presence of oxygen to form the metal oxide layer on the first surface and applying the lithium-containing layer to the metal oxide layer thereby bonding the lithium-containing layer with the current collector.

First claim

What is claimed is:

1. A method of manufacturing an electrode component for an electrochemical cell, the method comprising:
directing a laser beam toward a first surface of a current collector comprising a metal in the presence of oxygen to form a metal oxide layer on the first surface, wherein the metal oxide layer is continuous and the metal oxide layer comprises a plurality of features; and
applying a lithium-containing layer to the metal oxide layer, wherein the plurality of features is a plurality of mechanical interlock features which form a mechanical bond with the lithium-containing layer, wherein the plurality of mechanical interlock features comprise one or more features defining a triangular shaped region, a quadrilateral shaped region, a toroid shaped region, or a combination thereof and one or more valleys defining a triangular shaped region, a quadrilateral shaped region, a toroid shaped region, or a combination thereof.

2. The method of claim 1 , wherein the metal is selected from the group consisting of copper, nickel, titanium, iron, molybdenum, chromium, and a combination thereof, and the metal oxide is selected from the group consisting of copper oxide, nickel oxide, titanium oxide, iron oxide, molybdenum oxide, chromium oxide, and a combination thereof.

3. The method of claim 1 , wherein the laser beam has a power of greater than or equal to about 50 W, a scan speed of greater than or equal to about 1 mm/s, and a spot size of greater than or equal to about 20 μm.

4. The method of claim 1 , wherein the directing the laser beam toward the first surface of the current collector comprises moving the laser beam with respect to the current collector to create the plurality of features on the first surface.

5. The method of claim 1 , wherein heat is applied to the lithium-containing layer before it is applied to the metal oxide layer, while it is applied to the metal oxide layer, after it is applied to the metal oxide layer or a combination thereof.

6. The method of claim 5 , wherein the heat applied to the lithium-containing layer forms a bonding layer between the lithium-containing layer and the metal oxide layer, wherein the bonding layer chemically bonds the lithium-containing layer to the metal oxide layer, and wherein the bonding layer comprises lithium oxide, the metal, or a combination thereof.

7. The method of claim 1 , wherein the lithium-containing layer is a lithium foil or a lithium film.

8. The method of claim 1 , wherein the plurality of mechanical interlock features comprise one or more features defining a triangular shaped region and one or more valleys defining a quadrilateral shaped region.

9. The method of claim 1 , wherein the laser beam has a power of greater than or equal to about 100 W to less than or equal to about 1000 W, a scan speed of greater than or equal to about 100 mm/s to less than or equal to about 10 m/s, and a spot size of greater than or equal to about 60 μm to less than or equal to about 100 μm.

Assignees

• Gm Global Tech Operations Llc

Inventors

• Dai Fang
• Wang Hongliang
• Chen Shuru
• Zhang Qinglin
• Cai Mei

Classifications

• H01M4/62 Primary

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

• H01M4/0404

  by coating on electrode collectors · CPC title

• H01M4/0471

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

• H01M4/0492

  Chemical attack of the support material · CPC title

• H01M4/134

  Electrodes based on metals, Si or alloys · CPC title