Electrode and method for making the same

• US 20060220769A1
• Filed: 03/28/2006
• Published: 10/05/2006
• Est. Priority Date: 04/02/2005
• Status: Active Grant

• Current Assignee: Hon Hai Precision Industry Co., Ltd.
• Original Assignee: Hon Hai Precision Industry Co., Ltd.
• Inventors: Chen, Ga-Lane
• Granted Patent: US 7,812,450 B2
• Time in Patent Office: Days
• US Class Current: 335/78
• CPC Class Codes: H01G 4/008 Selection of materials
• CPC Class Codes: Y10S 438/964 Roughened surface

Abstract

The present invention relates to an electrode 100 with high capacitance. The electrode includes a conducting substrate 10 with a number of nano-sized structures 13 thereon and a coating 15. The nano-sized structures are concave-shaped and are of a size in the range from 2 nanometers to 50 nanometers. The nano-sized structures are configured for increasing specific surface area of the electrode. The present invention also provides a method for making the above-described electrode. The method includes steps of providing a conducting substrate, forming a number of nano-sized structures on the conducting substrate, and forming a coating on the nano-sized structures.

Claims

1. An electrode comprising:

a conducting substrate with a plurality of nano-sized structures thereon; and

a coating formed on the nano-sized structures;

wherein the nano-sized structures are configured for increasing specific surface area of the electrode.

2. The electrode as claimed in claim 1, wherein the conducting substrate is comprised of a material selected from the group consisting of graphite, lithium, aluminum, copper, silver, nickel, tungsten, molybdenum and any suitable combination alloy thereof.

3. The electrode as claimed in claim 1, wherein the nano-sized structures are concave-shaped.

4. The electrode as claimed in claim 1, wherein the nano-sized structures are convex-shaped.

5. The electrode as claimed in claim 1, wherein a size of each nano-sized structure is in the range from 2 nanometers to 50 nanometers.

6. The electrode as claimed in claim 1, wherein a size of each nano-sized structure is in the range from 10 nanometers to 40 nanometers.

7. The electrode as claimed in claim 1, wherein the coating is comprised of carbon nanotubes and nano-sized particles.

8. The electrode as claimed in claim 7, wherein the nano-sized particles are selected from the group consisting of indium tin oxide, chromium oxide, cobalt oxide, nickel oxide, ferric oxide, aluminum oxide, zinc oxide, silica oxide, titanium oxide and zirconium oxide.

9. The electrode as claimed in claim 1, wherein a thickness of the coating is in the range from 1 nanometer to 20 nanometers.

10. The electrode as claimed in claim 10, wherein a thickness of the coating is in the range from 2 nanometers to 10 nanometers.

11. A method for making an electrode, comprising the steps of:

providing a conducting substrate;

forming a plurality of nano-sized structures on the conducting substrate; and

forming a coating on the nano-sized structures;

wherein the nano-sized structures are configured for increasing specific surface area of the electrode.

12. The method as claimed in claim 11, wherein the conducting substrate is comprised of a material selected from the group consisting of graphite, lithium, aluminum, copper, silver, nickel, tungsten, molybdenum and any suitable combination alloy thereof.

13. The method as claimed in claim 11, wherein the nano-sized structures are concave-shaped.

14. The method as claimed in claim 11, wherein the nano-sized structures are convex-shaped.

15. The method as claimed in claim 11, wherein the nano-sized structures are formed by a nano-imprinting method.

16. The method as claimed in claim 11, wherein the coating is formed on the nano-sized structures by a deposition method.

17. The electrode as claimed in claim 11, wherein the coating is selected from the group consisting of carbon nanotubes and nano-sized particles.

18. The method as claimed in claim 17, wherein the nano-sized particles are selected from the group consisting of indium tin oxide, chromium oxide, cobalt oxide, nickel oxide, ferric oxide aluminum oxide, zinc oxide, silica oxide, titanium oxide and zirconium oxide.