Sandwich electrodes

Patent metadata

Field	Value
Publication number	US-11901500-B2
Application number	US-202016897543-A
Country	US
Kind code	B2
Filing date	Jun 10, 2020
Priority date	Dec 7, 2017
Publication date	Feb 13, 2024
Grant date	Feb 13, 2024

Abstract

In some embodiments, an electrode can include a first and second conductive layer. At least one of the first and second conductive layers can include porosity configured to allow electrolyte to flow therethrough. The electrode can also include an electrochemically active layer having electrochemically active material sandwiched between the first and second conductive layers. The electrochemically active layer can be in electrical communication with the first and second conductive layers.

First claim

What is claimed is:

1. An electrode comprising: a first current collector; a second current collector, at least one of the first and second current collectors comprising porosity configured to allow an electrolyte to flow therethrough; and an electrochemically active layer comprising electrochemically active material sandwiched between a first and second conductive layers, wherein the electrochemically active layer is in electrical communication with the first and second current collectors, wherein the electrochemically active layer comprises at least about 50% to about 99% by weight of silicon.

2. The electrode of claim 1 , wherein the at least one of the first and second current collectors comprises foam, mesh, or perforated material.

3. The electrode of claim 1 , wherein the at least one of the first and second current collectors comprises metal.

4. The electrode of claim 1 , wherein the at least one of the first and second current collectors comprises nickel foam.

5. The electrode of claim 1 , wherein the at least one of the first and second current collectors comprises carbon.

6. The electrode of claim 1 , wherein the at least one of the first and second current collectors comprises both the first and second current collectors.

7. The electrode of claim 1 , wherein the electrochemically active layer comprises silicon, germanium, tin, oxide, graphite, or a combination thereof.

8. The electrode of claim 1 , wherein the electrochemically active layer comprises a film.

9. The electrode of claim 8 , wherein the film comprises a silicon carbon composite film.

10. The electrode of claim 1 , wherein the electrochemically active layer comprises at least about 50% to about 99% by weight of silicon.

11. The electrode of claim 10 , wherein the electrochemically active layer comprises the silicon at about 60% to about 99% by weight.

12. The electrode of claim 11 , wherein the electrochemically active layer comprises the silicon at about 70% to about 99% by weight.

13. The electrode of claim 12 , wherein the electrochemically active layer comprises the silicon at about 80% to about 99% by weight.

14. The electrode of claim 1 , further comprising an attachment substance between the electrochemically active layer and the first and/or second current collector.

15. The electrode of claim 14 , wherein the attachment substance comprises polyamideimide, polyimide resin, polyacrylic acid, or a combination thereof.

16. The electrode of claim 1 , further comprising a third current collector and a second electrochemically active layer comprising electrochemically active material, wherein the second electrochemically active layer is sandwiched between the third current collector and the first or second current collector.

17. The electrode of claim 16 , wherein the electrochemically active layer and the second electrochemically active layer comprise the same electrochemically active material.

18. The electrode of claim 1 , wherein the electrode is a negative electrode.

19. An electrochemical cell comprising the electrode of claim 1 .

20. An electrochemical cell with an electrode comprising:a first current collector; a second current collector, at least one of the first and second current collectors comprising porosity configured to allow an electrolyte to flow therethrough; and an electrochemically active layer comprising electrochemically active material sandwiched between a first and second conductive layers, wherein the electrochemically active layer is in electrical communication with the first and second current collectors, wherein the electrochemical cell comprises a lithium ion battery.

21. The electrochemical cell of claim 20 , wherein the at least one of the first and second current collectors comprises foam, mesh, or perforated material.

22. The electrochemical cell of claim 20 , wherein the at least one of the first and second current collectors comprises metal.

23. The electrochemical cell of claim 20 , wherein the at least one of the first and second current collectors comprises nickel foam.

24. The electrochemical cell of claim 20 , wherein the at least one of the first and second current collectors comprises carbon.

25. The electrochemical cell of claim 20 , wherein the at least one of the first and second current collectors comprises both the first and second current collectors.

26. The electrochemical cell of claim 20 , wherein the electrochemically active layer comprises silicon, germanium, tin, oxide, graphite, or a combination thereof.

27. An electrode comprising:a first current collector; a second current collector, at least one of the first and second current collectors comprising porosity configured to allow an electrolyte to flow therethrough; and an electrochemically active layer comprising electrochemically active material sandwiched between a first and second conductive layers, wherein the electrochemically active layer is in electrical communication with the first and second current collectors, wherein the electrochemically active layer comprises a silicon carbon composite film.

28. The electrode of claim 27 , wherein the at least one of the first and second current collectors comprises foam, mesh, or perforated material.

29. The electrode of claim 27 , wherein the at least one of the first and second current collectors comprises metal.

30. The electrode of claim 27 , wherein the at least one of the first and second current collectors comprises nickel foam.

31. The electrode of claim 27 , wherein the at least one of the first and second current collectors comprises carbon.

32. The electrode of claim 27 , wherein the at least one of the first and second current collectors comprises both the first and second current collectors.

33. The electrode of claim 27 , wherein the electrochemically active layer comprises silicon, germanium, tin, oxide, graphite, or a combination thereof.

34. An electrode comprising:
a first current collector;
a second current collector, at least one of the first and second current collectors comprising porosity configured to allow an electrolyte to flow therethrough; and
an electrochemically active layer comprising electrochemically active material sandwiched between the first and second conductive layers, wherein the electrochemically active layer is in electrical communication with the first and second current collectors, and wherein the electrochemically active layer comprises at least about 50% to about 99% by weight of silicon.

35. The electrode of claim 34 , wherein the at least one of the first and second current collectors comprises foam, mesh, or perforated material.

36. The electrode of claim 34 , wherein the at least one of the first and second current collectors comprises metal.

37. The electrode of claim 34 , wherein the at least one of the first and second current collectors comprises nickel foam.

38. The electrode of claim 34 , wherein the at least one of the first and second current collectors comprises carbon.

39. The electrode of claim 34 , wherein the at least one of the first and second current collectors comprises both the first and second current collectors.

40. The electrode of

Assignees

• Enevate Corp

Inventors

• Liu Xiaohua
• Canton Giulia
• Lee David J
• Teng Shiang
• Park Benjamin Yong

Classifications

• H01M10/0525 Primary

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

• H01M4/0404

  by coating on electrode collectors · CPC title

• H01M4/134

  Electrodes based on metals, Si or alloys · CPC title

• H01M4/1395

  of electrodes based on metals, Si or alloys · CPC title

• H01M4/364

  as mixtures · CPC title