Solid state electrolytes

Patent metadata

Field	Value
Publication number	US-2024421350-A1
Application number	US-202418815464-A
Country	US
Kind code	A1
Filing date	Aug 26, 2024
Priority date	Apr 15, 2021
Publication date	Dec 19, 2024
Grant date	—

Abstract

A product, according to one general aspect, includes solid state electrolyte particles, each particle individually having a coating thereon, the coating comprising a first metal oxide in a first layer and a second metal oxide in a second layer. The first and second metal oxides are different. A method, according to one general aspect, includes fabricating a product using a powder of solid state electrolyte particles, each particle being coated with a coating formed 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. The first and second metal oxides are different.

First claim

What is claimed is:

1 . A product, comprising:
a composite structure comprising a cathode material intermixed with a plurality of solid state electrolyte particles, each of the solid state electrolyte particles, individually, having a coating thereon, 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.

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 first 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 , wherein the second 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 .

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 , wherein the composite structure is a cathode.

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

8 . A product, comprising:
solid state electrolyte particles, each particle individually having a coating thereon, 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.

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

10 . The product of claim 8 , wherein the first 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 , wherein the second 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 product 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 product of claim 8 , wherein coating has physical characteristics of formation by 15 cycles or less of atomic layer deposition performed on the particles while in loose powdered form.

13 . The product of claim 8 , wherein the product includes a cathode having the coated solid state electrolyte particles intermixed with a cathode material and the coated solid state electrolyte particles are sintered with the cathode material.

14 . The product of claim 8 , wherein the product is a solid state battery.

15 . The product of claim 8 , comprising an 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.

16 . A method, comprising:
fabricating a product using a powder of solid state electrolyte particles, each particle being coated with a coating formed 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.

17 . The method of claim 16 , wherein the solid state electrolyte particles are primarily Li 7 La 3 Zr 2 O 12 (LLZO).

18 . The method of claim 16 , wherein the first 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 , wherein the second 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 .

19 . The method of claim 16 , 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.

20 . The method of claim 16 , wherein the product is a feedstock for an additive manufacturing ink having the powder of coated particles therein.

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