Ex-situ solid electrolyte interface modification using chalcogenides for lithium metal anode

Patent metadata

Field	Value
Publication number	US-11735723-B2
Application number	US-202217939121-A
Country	US
Kind code	B2
Filing date	Sep 7, 2022
Priority date	Nov 9, 2017
Publication date	Aug 22, 2023
Grant date	Aug 22, 2023

Abstract

Implementations described herein generally relate to metal electrodes, more specifically lithium-containing anodes, high performance electrochemical devices, such as secondary batteries, including the aforementioned lithium-containing electrodes, and methods for fabricating the same. In one implementation, an anode electrode structure is provided. The anode electrode structure comprises a current collector comprising copper. The anode electrode structure further comprises a lithium metal film formed on the current collector. The anode electrode structure further comprises a solid electrolyte interface (SEI) film stack formed on the lithium metal film. The SEI film stack comprises a chalcogenide film formed on the lithium metal film. In one implementation, the SEI film stack further comprises a lithium oxide film formed on the chalcogenide film. In one implementation, the SEI film stack further comprises a lithium carbonate film formed on the lithium oxide film.

First claim

The invention claimed is:

1. A method, comprising:
forming a lithium metal film over a current collector, the current collector comprising a copper film; and
forming a solid electrolyte interface (SEI) film stack on the lithium metal film, comprising:
forming a chalcogenide film on the lithium metal film, wherein the chalcogenide film is selected from a group of a bismuth chalcogenide film, a copper chalcogenide film, or a combination thereof; and
forming a lithium halide film on the chalcogenide film.

2. The method of claim 1 , wherein the lithium halide film is selected from lithium fluoride, lithium chloride, lithium bromide, and lithium iodide.

3. The method of claim 2 , wherein the chalcogenide film is the bismuth chalcogenide film.

4. The method of claim 2 , wherein the chalcogenide film is the copper chalcogenide film.

5. The method of claim 1 , wherein the lithium halide film is selected from lithium chloride and lithium bromide.

6. The method of claim 1 , further comprising an anode film formed between the current collector and the lithium metal film.

7. The method of claim 1 , wherein the lithium metal film contacts the copper film.

8. The method of claim 1 , wherein the chalcogenide film is selected from a group of CuS, Cu 2 Se, Cu 2 S, Cu 2 Te, CuTe, Bi 2 Te 3 , Bi 2 Se 3 , or a combination thereof.

9. A method, comprising:
forming a lithium metal film over a current collector, the current collector comprising a copper film; and
forming a solid electrolyte interface (SEI) film stack on the lithium metal film, comprising:
forming a composite film on the lithium metal film, wherein the composite film comprises a lithium halide material and a chalcogenide material, wherein the chalcogenide material is selected from a group of a bismuth chalcogenide, a copper chalcogenide, or a combination thereof.

10. The method of claim 9 , wherein the lithium halide material is selected from lithium fluoride, lithium chloride, lithium bromide, and lithium iodide.

11. The method of claim 10 , wherein the chalcogenide material is selected from a group of CuS, Cu 2 Se, Cu 2 S, Cu 2 Te, CuTe, Bi 2 Te 3 , Bi 2 Se 3 , or a combination thereof.

12. The method of claim 10 , wherein the chalcogenide material is the bismuth chalcogenide.

13. The method of claim 10 , wherein the chalcogenide material is the copper chalcogenide.

14. The method of claim 9 , further comprising an anode film formed between the current collector and the lithium metal film.

15. The method of claim 9 , wherein the lithium metal film contacts the copper film.

16. An electrode structure, comprising:
a current collector comprising a copper film;
a lithium metal film formed over the current collector; and
a solid electrolyte interface (SEI) film stack formed on the lithium metal film, comprising:
a chalcogenide film on the lithium metal film, wherein the chalcogenide film is selected from a group of a bismuth chalcogenide film, a copper chalcogenide film, or a combination thereof; and
a lithium halide film on the chalcogenide film.

17. The electrode structure of claim 16 , wherein the lithium halide film is selected from lithium fluoride, lithium chloride, lithium bromide, and lithium iodide.

18. The electrode structure of claim 16 , wherein the lithium halide film is selected from lithium chloride and lithium bromide.

19. The electrode structure of claim 16 , wherein the chalcogenide film is the bismuth chalcogenide film.

20. The electrode structure of claim 16 , further comprising an anode film formed between the current collector and the lithium metal film.

Assignees

• Applied Materials Inc

Inventors

• Gopalakrishnan Nair Girish Kumar
• Herle Subramanya P
• Armstrong Karl J

Classifications

• H01M2004/028

  Positive electrodes · CPC title

• H01M4/628

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

• H01M10/4235

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

• H01M10/0525

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

• H01M4/661

  Metal or alloys, e.g. alloy coatings (H01M4/669 take precedence) · CPC title