METHOD FOR FABRICATING GRAPHENE ELECTRODE

• US 20170162873A1
• Filed: 02/15/2017
• Published: 06/08/2017
• Est. Priority Date: 11/21/2012
• Status: Active Grant

• Current Assignee: Industrial Technology Research Institute
• Original Assignee: Industrial Technology Research Institute
• Inventors: HUANG, Hsiao-Feng, CHEN, Ping-Chen, WEN, Chun-Hsiang, LIU, Wei-Jen
• Granted Patent: US 10,147,948 B2
• Time in Patent Office: Days
• CPC Class Codes: B05D 1/42 by non-rotary members
• CPC Class Codes: B05D 3/148 affecting the surface properties of the coating
• CPC Class Codes: H01G 11/36 Nanostructures, e.g. nanofibres, nanotubes or fullerenes
• CPC Class Codes: H01G 11/38 Carbon pastes or blends; Binders or additives therein
• CPC Class Codes: H01G 11/86 specially adapted for electrodes carbonisation or activation of carbon for the manufacture of electrodes H01G11/34
• CPC Class Codes: H01M 10/0525 Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
• CPC Class Codes: H01M 4/0402 Methods of deposition of the material
• CPC Class Codes: H01M 4/0404 by coating on electrode collectors
• CPC Class Codes: H01M 4/0409 by a doctor blade method, slip-casting or roller coating
• CPC Class Codes: H01M 4/0471 involving thermal treatment, e.g. firing, sintering, backing particulate active material, thermal decomposition, pyrolysis
• CPC Class Codes: H01M 4/133 Electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
• CPC Class Codes: H01M 4/1393 of electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
• CPC Class Codes: H01M 4/583 Carbonaceous material, e.g. graphite-intercalation compounds or CFx
• CPC Class Codes: H01M 4/621 Binders
• CPC Class Codes: H01M 4/624 Electric conductive fillers
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02E 60/13 Energy storage using capacitors
• CPC Class Codes: Y02E 60/50 Fuel cells
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries

Abstract

A graphene electrode, an energy storage device employing the same, and a method for fabricating the same are provided. The graphene electrode includes a metal foil, a non-doped graphene layer, and a hetero-atom doped graphene layer. Particularly, the hetero-atom doped graphene layer is separated from the metal foil by the non-doped graphene layer.

Claims

1. A method for fabricating a graphene electrode, comprising:

providing the metal foil;

forming the graphene layer on the metal foil; and

subjecting the graphene layer to a dry-process surface modification treatment, thereby doping the hetero-atoms into the graphene layer surface.

2. The method as claimed in claim 1, wherein the hetero-atoms comprise nitrogen atoms, phosphorous atoms, boron atoms, or combinations thereof.

3. The method as claimed in claim 1, wherein the hetero-atoms are doped into the surface of the graphene layer, forming the hetero-atom doped graphene layer.

4. The method as claimed in claim 1, wherein the graphene layer has a portion which is not doped with the hetero-atoms.

5. The method as claimed in claim 4, wherein the portion, which is not doped with the hetero-atoms, of the graphene layer is defined as the non-doped graphene layer.

6. The method as claimed in claim 1, wherein the steps for forming the graphene layer comprise:

forming the coating on the metal foil, wherein the coating is formed from a graphene-containing composition; and

subjecting the coating to a drying process, obtaining the graphene layer.

7. The method as claimed in claim 6, wherein the graphene-containing composition comprises:

a graphene; and

a binder.

8. The method as claimed in claim 7, wherein the binder comprises an aqueous-based binder, an organic-based binder, or combinations thereof.

9. The method as claimed in claim 7, wherein the graphene-containing composition further comprises a conducting agent.

10. The method as claimed in claim 9, wherein the conducting agent comprises graphite, carbon black, or combinations thereof.

11. The method as claimed in claim 1, wherein the dry-process surface modification treatment comprises a plasma modification process.

12. The method as claimed in claim 11, wherein a reactive gas is introduced during the plasma modification process, and the reactive gas comprises nitrogen gas, ammonia gas, air, or combinations thereof.

13. The method as claimed in claim 12, wherein the reactive gas further comprises argon gas, hydrogen gas, oxygen gas, or combinations thereof.

14. The method as claimed in claim 12, wherein a carrier gas is introduced during the plasma modification process, and the carrier gas comprises helium gas, argon gas, nitrogen gas, neon gas, or combinations thereof.