All-solid battery

Patent metadata

Field	Value
Publication number	US-9419285-B2
Application number	US-201314099073-A
Country	US
Kind code	B2
Filing date	Dec 6, 2013
Priority date	Dec 7, 2012
Publication date	Aug 16, 2016
Grant date	Aug 16, 2016

Abstract

An all-solid battery including a positive electrode including a binder, a negative electrode including a binder, and an electrolyte layer disposed between the positive electrode and the negative electrode and including a solid electrolyte, wherein at least one binder of the positive electrode and the negative electrode is cross-linked by a cross-linking agent.

First claim

What is claimed is:

1. An all-solid battery comprising:
a positive electrode comprising a binder;
a negative electrode comprising a binder; and
an electrolyte layer disposed between the positive electrode and the negative electrode and comprising a solid electrolyte,
wherein at least one binder of the positive electrode and the negative electrode is cross-linked by a cross-linking agent,
wherein the positive electrode and the negative electrode each comprises a first binder that binds to the electrolyte layer and is inactive to the solid electrolyte, wherein the first binder is cross-linked by the cross-linking agent,
wherein the first binder comprises a non-polar binder,
wherein the positive electrode and the negative electrode each further comprises a second binder that binds to a current collector and is more adhesive than the first binder to the current collector, wherein the second binder is optionally cross-linked by a cross-linking agent,
wherein the positive electrode comprises a positive electrode layer comprising the first binder and a positive electrode active material, and an adhesive layer for binding the current collector to the positive electrode layer, wherein the adhesive layer comprises the first binder and the second binder, and
wherein an amount of the first binder in the adhesive layer is about 3 weight % to about 30 weight %, and an amount of the second binder in the adhesive layer is about 2 weight % to about 20 weight % based on the total weight of the adhesive layer.

2. The all-solid battery of claim 1 , wherein at least the positive electrode comprises the solid electrolyte.

3. The all-solid battery of claim 1 , wherein the cross-linking agent is sulfur.

4. The all-solid battery of claim 1 , wherein the solid electrolyte comprises a non-polar binder that is not cross-linked.

5. The all-solid battery of claim 1 , wherein the non-polar binder comprises a non-polar polymer comprising an unsaturated bond.

6. The all-solid battery of claim 1 , wherein at least the binder of the negative electrode is cross-linked by the cross-linking agent.

7. The all-solid battery of claim 1 , wherein the solid electrolyte is a sulfide-containing solid electrolyte.

8. The all-solid battery of claim 1 , wherein the solid electrolyte comprises lithium sulfide as a first component, and at least one compound selected from silicon sulfide, phosphorus sulfide, germanium sulfide, and boron sulfide as a second component.

9. The all-solid battery of claim 1 , wherein the solid electrolyte comprises lithium sulfide as the first component and phosphorus sulfide as the second component.

10. The all-solid battery of claim 1 , wherein the positive electrode comprises a layered halite structure.

11. The all-solid battery of claim 1 , wherein the solid electrolyte comprises a lithium-ion conductive crystallized glass.

12. The all-solid battery of claim 1 , wherein the first binder comprises at least one of a styrene-butadiene-styrene block polymer, a styrene-ethylene-butadiene-styrene block polymer, a styrene-(styrene/butadiene)-styrene block terpolymer blend; a styrene-ethylene/propylene-styrene block polymer; a styrene butadiene rubber; a butadiene rubber; a natural rubber; an isoprene rubber; an ethylene-propylene-diene monomer rubber, and a partially hydrogenated product of the foregoing.

13. The all-solid battery of claim 1 , wherein the second binder comprises at least one of nitrile-butadiene rubber, chloroprene rubber, a polyacrylic acid ester copolymer, polyvinylidene fluoride, vinylidene fluoride-hexafluoro propylene copolymer, chlorinated polyethylene, polymethacrylic acid ester, polyvinyl alcohol, ethylene-vinyl alcohol copolymer, polyimide, polyamide, and polyimide amide.

14. The all-solid battery of claim 1 , wherein an amount of a conductive material in the adhesive layer is about 50 weight % to about 95 weight %.

15. The all-solid battery of claim 1 , wherein the binder is cross-linked by the cross-linking agent in the presence of a cross-linking catalyst.

16. The all-solid battery of claim 15 , wherein the cross-linking catalyst is magnesium oxide or zinc oxide.

Assignees

• Samsung Electronics Co Ltd

Inventors

• Hoshiba Koji
• Fujiki Satoshi
• Yamada Takanobu
• Aihara Yuichi

Classifications

• H01M10/0562

  Solid materials · CPC title

• H01M4/623

  fluorinated polymers · CPC title

• H01M4/622 Primary

  being polymers · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title