William K Chun

US Patent:

6368492, Apr 9, 2002

Filed:

Feb 17, 2000

Appl. No.:

09/506170

Inventors:

Sekharipuram R. Narayanan - Altadena CA
William Chun - Los Angeles CA
Thomas I. Valdez - Covina CA

Assignee:

California Institute of Technology - Pasadena CA

International Classification:

C25B 102

US Classification:

205638, 205637

Abstract:

A device for electrolysis of an aqueous solution of an organic fuel. The electrolyte is a solid-state polymer membrane with anode and cathode catalysts on both surfaces for electro-oxidization and electro-reduction. A low-cost and portable hydrogen generator can be made based on the device with organic fuels such as methanol.

US Patent:

6420059, Jul 16, 2002

Filed:

Nov 4, 1999

Appl. No.:

09/434850

Inventors:

Subbarao Surampudi - Glendora CA
Harvey A. Frank - Encino CA
Sekharipuram R. Narayanan - Altadena CA
William Chun - Los Angeles CA
Andrew Kindler - San Marino CA
Gerald Halpert - Pasadena CA

Assignee:

California Institute of Technology - Pasadena CA

International Classification:

H01M 800

US Classification:

429 13, 429 25, 429 17

Abstract:

Improvements to non acid methanol fuel cells include new formulations for materials. The platinum and ruthenium are more exactly mixed together. Different materials are substituted for these materials. The backing material for the fuel cell electrode is specially treated to improve its characteristics. A special sputtered electrode is formed which is extremely porous.

US Patent:

6432284, Aug 13, 2002

Filed:

Oct 6, 2000

Appl. No.:

09/684027

Inventors:

Sekharipuram R. Narayanan - Altadena CA
William Chun - Los Angeles CA
Thomas I. Valdez - Covina CA

Assignee:

California Institute of Technology - Pasadena CA

International Classification:

C25D 700

US Classification:

204263, 204265, 204266, 204282, 204283, 429 33

Abstract:

A device for electrolysis of an aqueous solution of an organic fuel. The electrolyte is a solid-state polymer membrane with anode and cathode catalysts on both surfaces for electro-oxidization and electro-reduction. A low-cost and portable hydrogen generator can be made based on the device with organic fuels such as methanol.

US Patent:

6485851, Nov 26, 2002

Filed:

Sep 23, 1998

Appl. No.:

09/160209

Inventors:

Sekharipuram R. Narayanan - Altadena CA
Thomas I. Valdez - Covina CA
William Chun - Los Angeles CA

Assignee:

California Institute of Technology - Pasadena CA

International Classification:

H01M 804

US Classification:

429 17, 429 19, 429 13, 429 39, 429 42

Abstract:

The invention is directed to an encapsulated fuel cell including a methanol source that feeds liquid methanol (CH OH) to an anode. The anode is electrical communication with a load that provides electrical power. The fuel cell also includes a hydrogen peroxide source that feeds liquid hydrogen peroxide (H O ) to the cathode. The cathode is also in communication with the electrical load. The anode and cathode are in contact with and separated by a proton-conducting polymer electrolyte membrane.

US Patent:

6533919, Mar 18, 2003

Filed:

Oct 10, 2000

Appl. No.:

09/686444

Inventors:

Sekharipuram R. Narayanan - Altadena CA
William Chun - Los Angeles CA
Thomas I. Valdez - Covina CA

Assignee:

California Institute of Technology - Pasadena CA

International Classification:

C25B 102

US Classification:

205637, 205638, 205639

Abstract:

A method for electrolysis of an aqueous solution of an organic fuel. The electrolyte is a solid-state polymer membrane with anode and cathode catalysts on both surfaces for electro-oxidation and electro-reduction.

US Patent:

6589684, Jul 8, 2003

Filed:

Oct 29, 1999

Appl. No.:

09/430583

Inventors:

Subbarao Surampudi - Glendora CA
Harvey A. Frank - Encino CA
Sekharipuram R. Narayanan - Altadena CA
William Chun - Los Angeles CA
Andrew Kindler - San Marino CA
Gerald Halpert - Pasadena CA

Assignee:

California Institute of Technology - Pasadena CA

International Classification:

H01M 802

US Classification:

429 38, 429 39, 296231

Abstract:

Improvements to non acid methanol fuel cells include new formulations for materials. The platinum and ruthenium are more exactly mixed together. Different materials are substituted for these materials. The backing material for the fuel cell electrode is specially treated to improve its characteristics. A special sputtered electrode is formed which is extremely porous.

US Patent:

6703150, Mar 9, 2004

Filed:

Jun 27, 2001

Appl. No.:

09/894022

Inventors:

Subbarao Surampudi - Glendora CA
Harvey A. Frank - Encino CA
Sekharipuram R. Narayanan - Altadena CA
William Chun - Los Angeles CA
Andrew Kindler - San Marino CA
Gerald Halpert - Pasadena CA

Assignee:

California Institute of Technology - Pasadena CA

International Classification:

H01M 804

US Classification:

429 13, 429 30, 429 34

Abstract:

Improvements to non acid methanol fuel cells include new formulations for materials. The platinum and ruthenium are more exactly mixed together. Different materials are substituted for these materials. The backing material for the fuel cell electrode is specially treated to improve its characteristics. A special sputtered electrode is formed which is extremely porous.

US Patent:

7056428, Jun 6, 2006

Filed:

Mar 18, 2003

Appl. No.:

10/391855

Inventors:

Sekharipuram R. Narayanan - Altadena CA, US
William Chun - Los Angeles CA, US
Thomas I. Valdez - Covina CA, US

Assignee:

California Institute of Technology - Pasedena CA

International Classification:

C25B 1/02
C25B 9/00

US Classification:

205637, 204252

Abstract:

A device for electrolysis of an aqueous solution of an organic fuel. The electrolyte is a solid-state polymer membrane with anode and cathode catalysts on both surfaces for electro-oxidization and electro-reduction. A low-cost and portable hydrogen generator can be made based on the device with organic fuels such as methanol.