Negative electrode for lithium battery, lithium battery including the same, and methods of manufacture thereof

Patent metadata

Field	Value
Publication number	US-9391329-B2
Application number	US-201313893597-A
Country	US
Kind code	B2
Filing date	May 14, 2013
Priority date	May 16, 2012
Publication date	Jul 12, 2016
Grant date	Jul 12, 2016

Abstract

A negative electrode including: a metal layer including lithium; and a platy carbonaceous material layer including a carbonaceous material having a plate structure and disposed on the metal layer.

First claim

What is claimed is:

1. A negative electrode for a lithium battery, the negative electrode comprising:
a metal layer comprising lithium; and
a carbonaceous material layer comprising a carbonaceous material having a plate structure and disposed on the metal layer,
wherein the carbonaceous material layer is in the form of a flat film, and the film has a thickness of about 1 nanometer to about 100 nanometers, and comprises a polycyclic aromatic molecule comprising a plurality of covalently bonded carbon atoms, and
wherein the carbonaceous material comprises at least one selected from graphene oxide, reduced graphene oxide, a nano-scale graphene platelet, and functionalized graphene.

2. The negative electrode of claim 1 , wherein the carbonaceous material layer is in epitaxy with the metal layer.

3. The negative electrode of claim 1 , wherein the carbonaceous material has a crystalline structure.

4. The negative electrode of claim 1 , wherein the carbonaceous material layer comprises a single-layered structure of 1 to 300 layers of carbon.

5. The negative electrode of claim 1 , wherein the carbonaceous material layer is an exfoliated layer or a grown layer.

6. The negative electrode of claim 1 , wherein the carbonaceous material layer is an exfoliated single layer.

7. The negative electrode of claim 1 , wherein the carbonaceous material layer comprises two or more layers grown on a substrate by chemical vapor deposition using a graphitization catalyst.

8. The negative electrode of claim 1 , wherein the carbonaceous material layer has a specific surface area of about 25 square meters per gram to about 500 square meters per gram.

9. The negative electrode of claim 1 , wherein the carbonaceous material layer further comprises an organic binder.

10. The negative electrode of claim 9 , wherein an amount of the binder of the carbonaceous material layer is in a range of about 5 parts by weight to about 50 parts by weight, based on 100 parts by weight of a carbonaceous material of the carbonaceous material layer.

11. The negative electrode of claim 1 , wherein the metal layer including lithium comprises at least one selected from lithium metal and a lithium-alloyable metal.

12. The negative electrode of claim 11 , wherein the lithium-alloyable metal comprises at least one metal selected from Si, In, Pb, Ga, Ge, Sn, Al, Bi, and Sb.

13. A lithium battery comprising:
a positive electrode;
an electrolyte; and
a negative electrode,
wherein the negative electrode comprises a metal layer including lithium, and a carbonaceous material layer comprising a carbonaceous material having a plate structure and disposed on the metal layer,
wherein the carbonaceous material layer is in the form of a flat film, the film has a thickness of about 1 nanometer to about 100 nanometers, and comprises a polycyclic aromatic molecule comprising a plurality of covalently bonded carbon atoms,
wherein the carbonaceous material comprises at least one selected from graphene oxide, reduced graphene oxide, a nano-scale graphene platelet, and functionalized graphene, and
wherein the metal layer is between the carbonaceous material layer and a support.

14. The lithium battery of claim 13 , wherein the carbonaceous material layer is disposed on a surface of the negative electrode which faces a separator, which is disposed between the positive electrode and the negative electrode.

15. The lithium battery of claim 13 , wherein the lithium battery is a secondary lithium battery.

Assignees

• Samsung Electronics Co Ltd
• Iucf Hyu

Inventors

• Yoon Seon-Mi
• Choi Jae-Young
• Kim Han-Su
• Park Ho-Bum
• Kwon Moon-Seok

Classifications

• H01M4/133

  Electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx · CPC title

• H01M4/366

  as layered products · CPC title

• Y02E60/122

  Cross-Sectional Technologies · mapped topic

• H01M4/587

  for inserting or intercalating light metals · CPC title

• Y02T10/7011

  Cross-Sectional Technologies · mapped topic