Core-shell composites for electrodes in metal-ion batteries

Patent metadata

Field	Value
Publication number	US-11424443-B2
Application number	US-201916595370-A
Country	US
Kind code	B2
Filing date	Oct 7, 2019
Priority date	Feb 28, 2012
Publication date	Aug 23, 2022
Grant date	Aug 23, 2022

Abstract

A battery electrode composition is provided comprising core-shell composites. Each of the composites may comprise a core and a multi-functional shell.

First claim

The invention claimed is:

1. A battery electrode composition, comprising:
a core-shell composite of (i) a Li 2 S active material and (ii) one or more functional additives,
wherein the one or more functional additives comprise a metal oxide or phosphate or metal sulfide, with the metal oxide or the phosphate or the metal sulfide being at least partially encased by a shell of the core-shell composite.

2. The battery electrode composition of claim 1 , wherein the one or more functional additives comprise the metal sulfide.

3. The battery electrode composition of claim 2 , wherein the metal sulfide is embedded in the core of the core-shell composite.

4. The battery electrode composition of claim 2 , wherein the metal sulfide is an active material.

5. The battery electrode composition of claim 1 ,
wherein the shell is a multi-layer shell that comprises a plurality of layers, and
wherein the metal oxide or the phosphate is embedded in one or more inner layers of the multi-layer shell.

6. The battery electrode composition of claim 1 , wherein the one or more functional additives comprise Li.

7. The battery electrode composition of claim 1 , wherein the Li 2 S active material exhibits micro-sized grains, nano-sized grains, or a combination thereof.

8. The battery electrode composition of claim 1 , wherein the shell of the core-shell composite comprises conductive carbon.

9. The battery electrode composition of claim 1 , wherein the battery electrode composition comprises one or more carbon nanotubes.

10. The battery electrode composition of claim 1 , wherein the battery electrode composition comprises graphene, one or more flake-shaped particles, or a combination thereof.

11. The battery electrode composition of claim 1 , wherein the core of the core-shell composite is substantially continuous.

12. The battery electrode composition of claim 1 , wherein one or more of the Li 2 S active material and the one or more functional additives comprise precipitates.

13. The battery electrode composition of claim 1 , wherein at least one component of the shell in the core-shell composite is deposited from a vapor phase.

14. A Li-ion battery, comprising:
an electrode comprising the battery electrode composition of claim 1 ; and
an electrolyte.

15. The Li-ion battery of claim 14 , wherein the electrolyte comprises one or more imide salts.

16. The Li-ion battery of claim 14 , wherein the electrolyte comprises an Li salt.

17. The Li-ion battery of claim 14 , wherein the electrolyte comprises a metal salt that produces one or more radicals or one or more metal halides during in-situ decomposition.

18. The Li-ion battery of claim 14 , wherein the electrolyte comprises a non-aqueous electrolyte.

Assignees

• Sila Nanotechnologies Inc

Inventors

• Yushin Gleb
• Zdyrko Bogdan
• Luzinov Igor
• Svoboda Vojtech
• Jacobs Alexander
• Berdichevsky Eugene
• Kim Hyea

Classifications

• H01M4/136

  Electrodes based on inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy · CPC title

• H01M4/38

  of elements or alloys · CPC title

• H01M4/5825

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

• H01M4/366 Primary

  as layered products · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title