Enhanced solid state battery cell

Patent metadata

Field	Value
Publication number	US-10454142-B2
Application number	US-201715610552-A
Country	US
Kind code	B2
Filing date	May 31, 2017
Priority date	May 31, 2016
Publication date	Oct 22, 2019
Grant date	Oct 22, 2019

Abstract

An enhanced solid state battery cell is disclosed. The battery cell can include a first electrode, a second electrode, and a solid state electrolyte layer interposed between the first electrode and the second electrode. The battery cell can further include a resistive layer interposed between the first electrode and the second electrode. The resistive layer can be electrically conductive in order to regulate an internal current flow within the battery cell. The internal current flow can result from an internal short circuit formed between the first electrode and the second electrode. The internal short circuit can be formed from the solid state electrolyte layer being penetrated by metal dendrites formed at the first electrode and/or the second electrode.

First claim

What is claimed is:

1. A battery cell, comprising:
a first electrode;
a second electrode;
a solid state electrolyte layer interposed between the first electrode and the second electrode; and
a resistive layer interposed between the first electrode and the second electrode, the resistive layer providing an electric resistance that limits a rate of internal current flow between the first electrode and the second electrode when an internal short circuit is formed between the first electrode and the second electrode, the internal short circuit being formed when the solid state electrolyte layer is penetrated by metal dendrites formed at the first electrode and/or the second electrode, the resistive layer comprising one or more ionically conductive material to enable a transfer of ions between the first electrode and the second electrode during a charge and/or a discharge of the battery cell, the one or more ionically conductive material including a polymer electrolyte, a polymer gel electrolyte, and/or a solid state electrolyte.

2. The battery cell of claim 1 , wherein the resistive layer comprises one or more electrically conductive materials.

3. The battery cell of claim 2 , wherein the one or more electrically conductive materials include carbon black, carbon nano tubes, graphene, conductive polymers, and/or conductive inorganic compounds.

4. The battery cell of claim 2 , wherein the rate of the internal current flow is proportional to a quantity of the one or more electrically conductive material.

5. The battery cell of claim 1 , wherein a power of the battery cell is directly proportional to a quantity of the one or more ionically conductive material.

6. The battery cell of claim 1 , wherein the resistive layer comprises one or more polymer binders.

7. The battery cell of claim 6 , wherein the one or more polymer binders include a polyvinylidene fluoride (PVDF), a styrene-butadiene (SBR), a carboxymethyl cellulose (CMC), a polyimide, a polyamide, and/or a polyethylene.

8. The battery cell of claim 1 , wherein the resistive layer comprises one or more nano-particle fillers.

9. The battery cell of claim 8 , wherein the one or more nano-particle fillers include a calcium carbonate (CaCO 3 ), a silicon titanium oxide (SiTiO 3 ), an aluminum oxide (Al 2 O 3 ), and/or a fumed silica.

10. The battery cell of claim 1 , wherein the resistive layer comprises one or more electrochemically active compounds.

11. The battery cell of claim 10 , wherein the one or more electrochemically active compounds include metal doped lithium nickel cobalt (NCM), lithium iron fluorine oxide (LiFeFO 2 ), iron fluoride (FeF x /C), and/or lithium nickel manganese cobalt oxide (NMC).

12. The battery cell of claim 1 , wherein the resistive layer is interposed between the solid state electrolyte layer and one of the first electrode and the second electrode.

13. The battery cell of claim 1 , further comprising:
a first polymer electrolyte layer, the first polymer electrolyte layer interposed between the first electrode and the solid state electrolyte layer, the first polymer electrolyte layer being configured to reduce a contact impedance between the first electrode and the solid state electrolyte layer.

14. The battery cell of 16 , further comprising:
a second polymer electrolyte layer, the second polymer electrolyte layer being interposed between the resistive layer and the second electrode.

15. The battery cell of claim 13 , further comprising:
a base film layer, the solid state electrolyte layer being interposed between the first polymer electrolyte layer and the base film layer, the first polymer electrolyte layer and the base film layer being configured to prevent a decomposition of the solid state electrolyte layer during a production and/or an operation of the battery cell.

16. The battery cell of claim 1 , wherein the battery cell comprises a metal battery.

17. The battery cell of claim 16 , wherein the metal battery comprises a lithium (Li) battery, a sodium (Na) battery, and/or a potassium (K) battery.

18. The battery cell of claim 16 , wherein the solid state electrolyte layer is formed by vapor deposition and/or plasma deposition.

Assignees

• American Lithium Energy Corp

Inventors

• Fan Jiang

Classifications

• H01M10/054

  Accumulators with insertion or intercalation of metals other than lithium, e.g. with magnesium or aluminium · CPC title

• H01M4/582

  Halogenides · CPC title

• H01M2300/0094

  in the form of layered products, e.g. coatings · CPC title

• H01M10/052

  Li-accumulators · CPC title

• H01M2300/0071

  Oxides · CPC title