Electrode Configuration with a Protrusion Inhibiting Separator

Patent metadata

Field	Value
Publication number	US-2021194008-A1
Application number	US-201917054639-A
Country	US
Kind code	A1
Filing date	May 28, 2019
Priority date	May 31, 2018
Publication date	Jun 24, 2021
Grant date	—

Abstract

An electrode configuration for a battery cell includes a positive electrode, a negative electrode, and a separator interposed between the positive electrode and the negative electrode. The separator includes an electrically conductive protrusion inhibiting layer and a first insulating layer interposed between and electrically insulating the protrusion inhibiting layer from one of the positive and negative electrode.

First claim

1 . An electrode configuration for a battery cell, comprising:
a positive electrode; a negative electrode; and a separator interposed between the positive electrode and the negative electrode, the separator comprising:
an electrically conductive protrusion inhibiting layer; and
a first insulating layer interposed between and electrically insulating the protrusion inhibiting layer from one of the positive and negative electrode.

2 . The electrode configuration as recited in claim 1 , wherein the protrusion inhibiting layer is configured to mechanically inhibit growth of lithium protrusions on the other of the positive and negative electrode.

3 . The electrode configuration as recited in claim 2 , wherein the protrusion inhibiting layer comprises one or more of carbon nanotubes, silver nanowires, particles of silver, particles of steel, particles of copper, and particles of lithium.

4 . The electrode configuration as recited in claim 3 , wherein the protrusion inhibiting layer further comprises a primary lithium ion conducting material that includes at least one material selected from the group consisting of polyethylene oxide, lithium-lanthanum-zirconium-oxide (LLZO), lithium phosphorus oxynitride (LiPON), lithium-aluminum-titanium-phosphate (LATP), Li 2 S—P 2 S 5 , and Li 3 PS 4 .

5 . The electrode configuration as recited in claim 1 , wherein the protrusion inhibiting layer is configured to chemically inhibit growth of lithium protrusions on the other of the positive and negative electrode.

6 . The electrode configuration as recited in claim 5 , wherein the protrusion inhibiting layer comprises an alloying material that alloys with lithium in the battery so as to inhibit growth of lithium protrusions.

7 . The electrode configuration as recited in claim 6 , wherein the alloying material includes one or more material selected from the group consisting of aluminum, tin, magnesium, silicon, silver, and gold.

8 . The electrode configuration as recited in claim 6 , wherein the protrusion inhibiting layer further comprises a lithium ion conducting material that includes at least one material selected from the group consisting of polyethylene oxide, lithium-lanthanum-zirconium-oxide (LLZO), lithium phosphorus oxynitride (LiPON), lithium-aluminum-titanium-phosphate (LATP), Li 2 S—P 2 S 5 , and Li 3 PS 4 .

9 . The electrode configuration as recited in claim 1 , wherein the first electronically insulating layer includes one or more materials selected from the group consisting of: PEO with conducting salt; gels with the addition of carbonate solvent and conducting salt; ceramic single ion conductors; lithium-lanthanum-zirconium-oxide (LLZO); lithium phosphorus oxynitride (LiPON); lithium-aluminum-titanium-phosphate (LATP); glassy single ion conductors; atomic layer deposition layers of lithium conducting, electronically insulating materials; Al 2 O 3 ; Li 3 P; Si 3 N 4 ; cation exchange polymers; and Nafion.

10 . The electrode configuration as recited in claim 1 , wherein the first electronically insulating layer has low permeability to counter-ions.

11 . The electrode configuration as recited in claim 1 , wherein the first electronically insulating layer includes a single ion conducting layer.

12 . The electrode configuration as recited in claim 1 , the separator further comprising a second insulating layer that electrically insulates the protrusion inhibiting layer from the other of the positive and negative electrode.

13 . A battery cell comprising:
an electrode configuration comprising:
a positive electrode;
a negative electrode; and
a separator interposed between the positive electrode and the negative electrode, the separator comprising:
an electrically conductive protrusion inhibiting layer; and
a first insulating layer interposed between and electrically separating the protrusion inhibiting layer from one of the positive and negative electrode.

14 . The battery cell as recited in claim 13 , wherein the protrusion inhibiting layer is configured to mechanically inhibit growth of lithium protrusions on the other of the positive and negative electrode.

15 . The battery cell as recited in claim 14 , wherein the protrusion inhibiting layer comprises one or more of carbon nanotubes, silver nanowires, particles of silver, particles of steel, particles of copper, and particles of lithium.

16 . The battery cell as recited in claim 15 , wherein the protrusion inhibiting layer further comprises a primary lithium ion conducting material that includes at least one material selected from the group consisting of polyethylene oxide, lithium-lanthanum-zirconium-oxide (LLZO), lithium phosphorus oxynitride (LiPON), lithium-aluminum-titanium-phosphate (LATP), Li 2 S—P 2 S 5 , and Li 3 PS 4 .

17 . The battery cell as recited in claim 13 , wherein the protrusion inhibiting layer is configured to chemically inhibit growth of lithium protrusions on the other of the positive and negative electrode.

18 . The battery cell as recited in claim 17 , wherein the protrusion inhibiting layer comprises an alloying material that alloys with lithium in the battery so as to inhibit growth of lithium protrusions.

19 . The battery cell as recited in claim 18 , wherein the alloying material includes one or more material selected from the group consisting of aluminum, tin, magnesium, silicon, silver, and gold.

Assignees

• Gorlin Yelena
• Christensen John F
• Craig Nathan P
• Samsonidze Georgy
• Subbaraman Anantharaman
• Bosch Gmbh Robert

Inventors

• Gorlin Yelena
• Christensen John F
• Craig Nathan P
• Samsonidze Georgy
• Subbaraman Anantharaman

Classifications

• H01M50/431

  Inorganic material · CPC title

• H01M50/434

  Ceramics · CPC title

• H01M50/449

  having a layered structure · CPC title

• Y02P70/50

  Manufacturing or production processes characterised by the final manufactured product · CPC title

• H01M4/5825

  Oxygenated metallic salts or polyanionic structures, e.g. borates, phosphates, silicates, olivines · CPC title