Solid state electrolytes

Patent metadata

Field	Value
Publication number	US-12100800-B2
Application number	US-202117231886-A
Country	US
Kind code	B2
Filing date	Apr 15, 2021
Priority date	Apr 15, 2021
Publication date	Sep 24, 2024
Grant date	Sep 24, 2024

Abstract

A product includes a solid state electrolyte particle coated with a coating consisting essentially of metal oxide. A method includes depositing a coating on a solid state electrolyte particle by atomic layer deposition. A method includes fabricating a product using a plurality of solid state electrolyte particles coated with a coating consisting essentially of metal oxide.

First claim

What is claimed is:

1. A product, comprising:
a cathode formed at least in part from a cathode material mixed with a plurality of solid state electrolyte particles of a powder, each of the solid state electrolyte particles, individually, having a coating thereon, the coating consisting essentially of a first metal oxide in a first layer and a second metal oxide in a second layer, wherein the first and second metal oxides are different.

2. The product of claim 1 , wherein each solid state electrolyte particle is primarily Li 7 La 3 Zr 2 O 12 (LLZO).

3. The product of claim 1 , wherein the metal oxides are selected from the group consisting of: Al 2 O 3 , TiO 2 , ZnO, SnO 2 , Fe 2 O 3 , MgO, MnO 2 , NiO, and ZrO 2 , wherein an average particle size of the solid state electrolyte particles is less than about 200 nm in diameter.

4. The product of claim 1 , wherein the solid state electrolyte particles include at least one dopant material selected from the group consisting of: tantalum (Ta), niobium (Nb), tungsten (W), iron (Fe), silicon (Si), germanium (Ge), gallium (Ga), antimony (Sb), molybdenum (Mo), yttrium (Y), rubidium (Rb), calcium (Ca), barium (Ba).

5. The product of claim 1 , wherein the coating has physical characteristics of formation by 15 cycles or less of atomic layer deposition performed on the particles while in loose powdered form.

6. The product of claim 1 , comprising the plurality of coated solid state electrolyte particles compressed into a pellet.

7. The product of claim 1 , wherein the product is a solid state battery.

8. A method, comprising:
depositing a coating on each individual particle of a plurality of solid state electrolyte particles in powdered form by 15 cycles or less of atomic layer deposition, the coating comprising a first metal oxide in a first layer and a second metal oxide in a second layer that is formed directly on the first layer, wherein the first and second metal oxides are different.

9. The method of claim 8 , wherein each solid state electrolyte particle is primarily Li 7 La 3 Zr 2 O 12 (LLZO).

10. The method of claim 8 , wherein the coating is primarily a metal oxide, wherein the metal oxide is selected from the group consisting of: Al 2 O 3 , TiO 2 , ZnO, SnO 2 , Fe 2 O 3 , MgO, MnO 2 , NiO, and ZrO 2 .

11. The method of claim 8 , wherein the solid state electrolyte particles include at least one dopant material selected from the group consisting of: tantalum (Ta), niobium (Nb), tungsten (W), iron (Fe), silicon (Si), germanium (Ge), gallium (Ga), antimony (Sb), molybdenum (Mo), yttrium (Y), rubidium (Rb), calcium (Ca), barium (Ba).

12. The method of claim 8 , comprising consolidating a plurality of the coated solid state electrolyte particles to form pellets.

13. The method of claim 8 , comprising combining a plurality of the solid state electrolyte particles with an additive prior to and/or after the depositing, wherein the additive is selected from the group consisting of: Li 3 BO 3 , Li 2 O, Li 2 CO 3 , LiAlTiPO 4 (LATP), LiGePS (LGPS), lithium iron phosphate (LFP), lithium manganese oxide (LMO), graphite, graphene, and carbon nanotubes.

14. A method, comprising:
fabricating a product using a powder of solid state electrolyte particles, each particle being coated with a coating consisting essentially of metal oxides via 15 cycles or less of atomic layer deposition, the coating comprising a first metal oxide in a first layer and a second metal oxide in a second layer, wherein the first and second metal oxides are different.

15. The method of claim 14 , wherein the solid state electrolyte particles are primarily Li 7 La 3 Zr 2 O 12 (LLZO), wherein the metal oxide is selected from the group consisting of: Al 2 O 3 , TiO 2 , ZnO, SnO 2 , Fe 2 O 3 , MgO, MnO 2 , NiO, and ZrO 2 .

16. The method of claim 14 , comprising mixing the coated solid state electrolyte particles with a cathode material to form a mixture; and sintering the mixture of the coated solid state electrolyte particles and the cathode material.

17. The method of claim 14 , wherein the product is a feedstock for an additive manufacturing ink having the powder of coated particles therein.

18. The method of claim 16 , comprising using the sintered mixture as a cathode in a solid state battery.

19. The method of claim 16 , wherein the sintered mixture is used as a cathode in a solid state battery.

Assignees

• L Livermore Nat Security Llc

Inventors

• Ye Jianchao
• Espitia Jose Ali
• Miller John
• Wood Marissa

Classifications

• H01M2300/0094

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

• C01P2004/03

  obtained by SEM · CPC title

• C01P2002/52

  containing elements as dopants · CPC title

• C01P2004/84

  one phase coated with the other · CPC title

• C01P2006/40

  Electric properties · CPC title