IP Library › Patent Application 17532549
Patent Application
App. No. 17/532,549

SILICON BASED LITHIUM ION BATTERY AND IMPROVED CYCLE LIFE OF SAME

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Patent No.
US None
App. No.
17/532,549
Abstract

Silicon-dominate battery electrodes, battery cells utilizing the silicon-dominate battery electrodes, and methods of manufacturing are disclosed. Such a battery electrode includes a current collector and an active material layer on the current collector. The active material layer comprises at least 50% silicon. In some embodiments, a ratio of a thickness of the current collector to a thickness of the active material layer is over 0.5, and a porosity of the active material layer is below 70%.

Claims (49)

1 . A battery anode, comprising:

a current collector comprising a current collector top side and a current collector bottom side separated from the current collector top side by a thickness of the current collector; and

an active material layer comprising an active material layer top side and an active material layer bottom side on the current collector top side,

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

wherein the active material layer top side is separated from the active material layer bottom side by a thickness of the active material layer; and

wherein a ratio of the thickness of the current collector to the thickness of the active material layer is; between 0.15 and 0.66.

2 . The battery anode of claim 1 , wherein a porosity of the active material layer is below 70%.

3 . The battery anode of claim 1 , wherein a porosity of the active material layer is below 60%.

4 . The battery anode of claim 1 , wherein a porosity of the active material layer is below 50%.

5 . The battery anode of claim 1 , wherein a porosity of the active material layer is below 40%.

6 . The battery anode of claim 1 , wherein a porosity of the active material layer is below 30%.

7 . The battery anode of claim 1 , wherein the first ratio of the thickness of the current collector to the thickness of the active material layer is between 0.25 and 0.66.

8 . (canceled)

9 . The battery anode of claim 1 , wherein:

a ratio of the thickness of the current collector to a porosity-adjusted active material layer thickness of the active material layer is over 0.25; and

wherein the porosity-adjusted active material layer thickness is determined per T×(1−P/100), where Tis the thickness of the active material layer and P is a porosity percentage of the active material layer.

10 . The battery anode of claim 9 , wherein the ratio of the thickness of the current collector to the porosity-adjusted active material layer thickness of the active material layer is over 0.5.

11 . The battery anode of claim 9 , wherein the ratio of the thickness of the current collector to the porosity-adjusted active material layer thickness of the active material layer is over 0.6.

12 . The battery anode of claim 9 , wherein the ratio of the thickness of the current collector to the porosity-adjusted active material layer thickness of the active material layer is over 1.

13 . The battery anode of claim 9 , wherein the ratio of the thickness of the current collector to the porosity-adjusted active material layer thickness of the active material layer is over 1.3.

14 . (canceled)

15 . A battery cell comprising:

a cathode;

a separator;

an electrolyte; and

an anode comprising a current collector and an active material layer;

wherein the current collector comprises a current collector top side and a current collector bottom side separated from the current collector top side by a thickness of the current collector;

wherein the active material layer comprises an active material layer top side and an active material layer bottom side on the current collector top side;

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

wherein the active material layer top side is separated from the active material layer bottom side by a thickness of the active material layer;

wherein a ratio of the thickness of the current collector to a porosity-adjusted active material layer thickness of the active material layer is between 0.25 and 1; and

wherein the porosity-adjusted active material layer thickness is determined per T×(1−P/100), where T is the thickness of the active material layer and P is a porosity percentage of the active material layer.

16 . The battery cell of claim 15 , wherein a porosity of the active material layer is below 70%.

17 . The battery cell of claim 15 , wherein a porosity of the active material layer is below 60%.

18 . The battery cell of claim 15 , wherein a porosity of the active material layer is below 50%.

19 . The battery cell of claim 15 , wherein a porosity of the active material layer is below 40%.

20 . The battery cell of claim 15 , wherein a porosity of the active material layer is below 30%.

21 . The battery cell of claim 15 , wherein a ratio of the thickness of the current collector to the thickness of the active material layer is between 0.15 and 0.66.

22 . (canceled)

23 . The battery cell of claim 15 , wherein the ratio of the thickness of the current collector to the porosity-adjusted active material layer thickness of the active material layer is between 0.33 and 1.

24 . The battery cell of claim 15 , wherein the ratio of the thickness of the current collector to the porosity-adjusted active material layer thickness of the active material layer is between 0.5 and 1.

25 . The battery cell of claim 15 , wherein the ratio of the thickness of the current collector to the porosity-adjusted active material layer thickness of the active material layer is between 0.6 and 1.

26 . The battery cell of claim 15 , wherein the ratio of the thickness of the current collector to the porosity-adjusted active material layer thickness of the active material layer is between 0.25 and 0.6

27 . The battery cell of claim 15 , wherein the ratio of the thickness of the current collector to porosity-adjusted active material layer thickness of the active material layer is between 0.25 and 0.5.

28 . (canceled)

29 . The battery anode of claim 1 , wherein the ratio of the thickness of the current collector to the thickness of the active material layer is between 0.25 and 0.66.

30 . The battery anode of claim 1 , wherein the ratio of the thickness of the current collector to the thickness of the active material layer is between 0.5 and 0.66.

31 . The battery anode of claim 1 , wherein the ratio of the thickness of the current collector to the thickness of the active material layer is between 0.25 and 0.5.

32 . The battery anode of claim 9 , wherein the ratio of the thickness of the current collector to the porosity-adjusted active material layer thickness of the active material layer is between 0.25 and 1.

Assignments (1)
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 →