Method of fabricating an electrode for an electrochemical cell

Patent metadata

Field	Value
Publication number	US-2023343917-A1
Application number	US-202217725117-A
Country	US
Kind code	A1
Filing date	Apr 20, 2022
Priority date	Apr 20, 2022
Publication date	Oct 26, 2023
Grant date	—

Abstract

In various aspects, the present disclosure provides a method of manufacturing an electrode for an electrochemical cell. The method includes contacting a solid electrode material and a substrate at an interface. The method further includes preparing a liquid electrode material at the interface by heating at least a portion of the solid electrode material to a first temperature. The first temperature is greater than or equal to a melting point of the solid electrode material. The method further includes creating a layer of the liquid electrode material on the substrate by moving at least one of the solid electrode material and the substrate with respect to the other of the solid electrode material and the substrate. The method further includes forming the electrode by cooling the liquid electrode material to a second temperature. The second temperature is less than or equal to the melting point.

First claim

1 . A method of manufacturing an electrode for an electrochemical cell, the method comprising:
contacting a solid electrode material and a substrate at an interface; preparing a liquid electrode material at the interface by heating at least a portion of the solid electrode material to a first temperature greater than or equal to a melting point of the solid electrode material; creating a layer of the liquid electrode material on the substrate by moving at least one of the solid electrode material and the substrate with respect to the other of the solid electrode material and the substrate; and forming the electrode by cooling the liquid electrode material to a second temperature less than or equal to the melting point.

2 . The method of claim 1 , wherein the solid electrode material includes lithium.

3 . The method of claim 2 , wherein the solid electrode material is a lithium metal electrode.

4 . The method of claim 1 , further comprising, prior to the contacting, providing the solid electrode material.

5 . The method of claim 4 , wherein the providing includes unfurling the solid electrode material from a roll, extruding the solid electrode material, providing a powder comprising the solid electrode material, or a combination thereof.

6 . The method of claim 4 , wherein the providing includes preparing the solid electrode material by combining a first precursor and a second precursor.

7 . The method of claim 1 , wherein the heating includes directly heating the solid electrode material.

8 . The method of claim 1 , wherein the heating includes directly heating the substrate prior to or during the contacting.

9 . The method of claim 1 , wherein the creating includes translating the substrate with respect to the solid electrode material via a pair of rollers.

10 . The method of claim 1 , further comprising separating at least a portion of the electrode from the substrate.

11 . The method of claim 1 , wherein the substrate comprises an electrically-conductive material configured to be a current collector or an electrically-insulating material configured to be a solid-state electrolyte.

12 . The method of claim 1 , wherein the substrate comprises an electroactive material, and the forming creates a precursor for pre-lithiation of the electroactive material.

13 . The method of claim 1 , wherein the contacting includes contacting a first electrode material and the substrate at a first interface and contacting a second electrode material and the substrate at a second interface, the substrate being at least partially disposed between the first electrode material and the second electrode material.

14 . The method of claim 1 , further comprising, after the forming, disposing an interleaf layer on a surface of the electrode.

15 . The method of claim 1 , wherein the electrode has an average thickness that is greater than or equal to about 10 micrometers to less than or equal to about 30 micrometers.

16 . The method of claim 1 , wherein
the first temperature is greater than or equal to about 240° C., and the second temperature is greater than or equal to about 25° C. to less than or equal to about 180° C.

17 . The method of claim 1 , wherein the heating includes hot rolling, infrared (IR) radiating, providing hot argon gas, laser irradiating, resistance heating, or combinations thereof.

18 . The method of claim 1 , further comprising, prior to the contacting, treating the substrate, the treating including cleaning, laser ablating, providing a gas, acid washing, thermal treating, depositing wetting material, or combinations thereof.

19 . The method of claim 1 , the method further comprising, after the forming, treating a surface of the electrode, the treating including providing a cover gas, laser treating, rolling, or combinations thereof.

20 . A method of manufacturing a lithium metal electrode, the method comprising:
contacting a solid electrode material and a substrate at an interface; preparing a liquid electrode material at the interface by heating at least a portion of the solid electrode material to a first temperature greater than or equal to a melting point of the solid electrode material; creating a layer of the liquid electrode material on the substrate by moving at least one of the solid electrode material and the substrate with respect to the other of the solid electrode material and the substrate; and forming the electrode by cooling the liquid electrode material to a second temperature less than or equal to the melting point.

Assignees

• Gm Global Tech Operations Llc

Inventors

• Huemiller Erik Damon
• Xu Shaomao
• Sekol Ryan Curtis
• Cai Wayne
• Balogh Michael P
• Yu Xiaowei

Classifications

• H01M4/0404 Primary

  by coating on electrode collectors · CPC title

• H01M4/0409 Primary

  by a doctor blade method, slip-casting or roller coating · CPC title

• H01M4/382

  Lithium (H01M4/405 takes precedence) · CPC title

• H01M2004/021

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

• Y02E60/10

  Energy storage using batteries · CPC title