IP Library › Granted Patent US 11,387,443
Granted Patent B1
US 11,387,443 · App. 17/532,739 · Granted Jul 12, 2022

Silicon based lithium ion battery and improved cycle life of same

Inventors: Hong Zhao (Aliso Viejo, CA); Younes Ansari (Irvine, CA); Vincent Giordani (Irvine, CA); Mya Le Thai (Irvine, CA); Qing Zhang (Irvine, CA); Benjamin Park (Mission Viejo, CA)
Assignee: ENEVATE CORPORATION
H01M4/134H01M4/386H01M4/621H01M10/0525H01M2004/021H01M2004/027H01M2010/4292
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Quick Facts
Patent No.
US 11,387,443
App. No.
17/532,739
Granted
Jul 12, 2022
Kind
B1
Abstract

Silicon-dominate battery electrodes, battery cells utilizing the silicon-dominate battery electrodes, and methods of manufacturing are disclosed. Such a battery cell includes a cathode, a separator, an electrolyte, and an anode. The anode comprises a current collector and active material on the current collector. The active material layer includes at least 50% silicon. A ratio of the electrolyte to Ah is over 2 g/Ah.

Claims (56)

1. A battery cell comprising:

a cathode;

a separator;

an electrolyte; and

an anode;

wherein the anode comprises a current collector and active material layer on the current collector;

wherein the active material layer comprises at least 50% silicon;

wherein a ratio of the electrolyte to Ah for the battery cell is greater than 2 g/Ah;

wherein the anode has an areal capacity between 9 mAh/cm 2 and 15 mAh/cm 2 ; and

wherein the electrolyte comprises 0.02 to 0.1 mL/cm 2 of the anode that participates in an electrochemical reaction.

2. The battery cell of claim 1 , wherein the ratio of the electrolyte to Ah is greater than 2.4 g/Ah.

3. The battery cell of claim 1 , wherein the ratio of the electrolyte to Ah is greater than 5 g/Ah.

4. The battery cell of claim 1 , wherein the ratio of the electrolyte to Ah is greater than 10 g/Ah.

5. The battery cell of claim 1 , wherein the ratio of the electrolyte to Ah is greater than 16 g/Ah.

6. A battery cell comprising:

a cathode;

a separator;

an electrolyte; and

an anode;

wherein the anode comprises a current collector and active material layer on the current collector;

wherein the active material layer comprises at least 50% silicon;

wherein a ratio of the electrolyte to Ah for the battery cell is greater than 2 g/Ah;

wherein the anode has an areal capacity between 5 mAh/cm 2 and 11 mAh/cm 2 ; and

wherein the electrolyte comprises 0.005 to 0.05 mL/cm 2 of the anode that participates in an electrochemical reaction.

7. The battery cell of claim 1 , wherein a porosity of the active material layer is less than 70%.

8. The battery cell of claim 1 , wherein a porosity of the active material layer is less than 60%.

9. The battery cell of claim 1 , wherein a porosity of the active material layer is less than 50%.

10. The battery cell of claim 1 , wherein a porosity of the active material layer is less than 40%.

11. The battery cell of claim 1 , wherein a porosity of the active material layer is less than 30%.

12. The battery cell of claim 1 , wherein a second ratio of a thickness of the current collector to a thickness of the active material layer is greater than 0.5.

13. The battery cell of claim 1 , wherein a second ratio of a thickness of the current collector to a thickness of the active material layer is greater than 0.66.

14. The battery cell of claim 1 , wherein a second ratio of a thickness of the current collector to a porosity-adjusted active material layer thickness of the active material layer is greater than 0.25.

15. The battery cell of claim 1 , wherein a second ratio of a thickness of the current collector to a porosity-adjusted active material layer thickness of the active material layer is greater than 0.33.

16. The battery cell of claim 1 , wherein a second ratio of a thickness of the current collector to a porosity-adjusted active material layer thickness of the active material layer is greater than 0.5.

17. The battery cell of claim 1 , wherein a second ratio of a thickness of the current collector to a porosity-adjusted active material layer thickness of the active material layer is greater than 0.6.

18. The battery cell of claim 1 , wherein a second ratio of a thickness of the current collector to a porosity-adjusted active material layer thickness of the active material layer is greater than 1.

19. The battery cell of claim 1 , wherein a second ratio of a thickness of the current collector to a porosity-adjusted active material layer thickness of the active material layer is greater than 1.3.

20. The battery cell of claim 1 , wherein the active material layer further comprises a pyrolyzed binder.

21. The battery cell of claim 6 , wherein the ratio of the electrolyte to Ah is greater than 2.4 g/Ah.

22. The battery cell of claim 6 , wherein the ratio of the electrolyte to Ah is greater than 5 g/Ah.

23. The battery cell of claim 6 , wherein the ratio of the electrolyte to Ah is greater than 10 g/Ah.

24. The battery cell of claim 6 , wherein the ratio of the electrolyte to Ah is greater than 16 g/Ah.

25. The battery cell of claim 6 , wherein a porosity of the active material layer is less than 70%.

26. The battery cell of claim 6 , wherein a porosity of the active material layer is less than 60%.

27. The battery cell of claim 6 , wherein a porosity of the active material layer is less than 50%.

28. The battery cell of claim 6 , wherein a porosity of the active material layer is less than 40%.

29. The battery cell of claim 6 , wherein a porosity of the active material layer is less than 30%.

30. The battery cell of claim 6 , wherein a second ratio of a thickness of the current collector to a thickness of the active material layer is greater than 0.5.

31. The battery cell of claim 6 , wherein a second ratio of a thickness of the current collector to a thickness of the active material layer is greater than 0.66.

32. The battery cell of claim 6 , wherein a second ratio of a thickness of the current collector to a porosity-adjusted active material layer thickness of the active material layer is greater than 0.25.

33. The battery cell of claim 6 , wherein a second ratio of a thickness of the current collector to a porosity-adjusted active material layer thickness of the active material layer is greater than 0.33.

34. The battery cell of claim 6 , wherein a second ratio of a thickness of the current collector to a porosity-adjusted active material layer thickness of the active material layer is greater than 0.5.

35. The battery cell of claim 6 , wherein a second ratio of a thickness of the current collector to a porosity-adjusted active material layer thickness of the active material layer is greater than 0.6.

36. The battery cell of claim 6 , wherein a second ratio of a thickness of the current collector to a porosity-adjusted active material layer thickness of the active material layer is greater than 1.

37. The battery cell of claim 6 , wherein a second ratio of a thickness of the current collector to a porosity-adjusted active material layer thickness of the active material layer is greater than 1.3.

38. The battery cell of claim 6 , wherein the active material layer further comprises a pyrolyzed binder.

Assignments (2)
SECURITY INTEREST Recorded Mar 10, 2026
From: ENEVATE CORPORATION
To: MCANDREWS, HELD & MALLOY LTD.
Reel/Frame 075093/0935 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Nov 23, 2021
From: ZHAO, HONG; ANSARI, YOUNES; GIORDANI, VINCENT; THAI, MYA LE; ZHANG, QING; PARK, BENJAMIN
To: ENEVATE CORPORATION
Reel/Frame 058191/0157 →
Continuity (1)
Division 17532549 · Nov 22, 2021