Gerald J Koncar

US Patent:

6905793, Jun 14, 2005

Filed:

May 5, 2003

Appl. No.:

10/429457

Inventors:

Leonard G. Marianowski - Mount Prospect IL, US
Gerald J. Koncar - McHenry IL, US
Qinbai Fan - Chicago IL, US
Jeremy Chervinko - Streamwood IL, US

Assignee:

Gas Technology Institute - Des Plaines IL

International Classification:

H01M002/00

US Classification:

429 35, 429 34, 429 36

Abstract:

In a fuel cell stack, a bipolar separator plate having two joined together coextensive separator plate elements having perpendicularly disposed corrugated regions and forming a coolant chamber there between. By virtue of this arrangement, fuel and oxidant gases fed to the fuel cell stack have a cross-flow relationship. Internal stack manifolding is provided for distribution of a coolant to each of the coolant chambers.

US Patent:

59423471, Aug 24, 1999

Filed:

May 20, 1997

Appl. No.:

8/859234

Inventors:

Gerald J. Koncar - McHenry IL
Leonard G. Marianowski - Mt. Prospect IL

Assignee:

Institute of Gas Technology - Des Plaines IL

International Classification:

H01M 216

US Classification:

429 30

Abstract:

A gas impervious bi-polar separator plate for a proton exchange membrane fuel cell having at least one electronically conductive material in an amount in a range of about 50% to about 95% by weight of the separator plate, at least one resin in an amount of at least about 5% by weight of the separator plate, and at least one hydrophilic agent, where the electronically conductive material, the resin, and the hydrophilic agent are substantially uniformly dispersed throughout the separator plate.