Michael A Demarinis

US Patent:

6368476, Apr 9, 2002

Filed:

Jun 1, 2000

Appl. No.:

09/585124

Inventors:

Michael DeMarinis - Upton MA 01568
Emory S. De Castro - Nahant MA 01908-1028
Robert J. Allen - Saugus MA 01906
Khaleda Shaikh - Woburn MA 01801

International Classification:

C25B 1100

US Classification:

204284, 20429007, 20429015, 204294, 429 40, 429 42, 429 44

Abstract:

Gas Diffusion Electrodes (GDEs) play a pivotal role in clean energy production as well as in electrochemical processes and sensors. These gas-consuming electrodes are typically designed for liquid electrolyte systems, and are commercially manufactured by hand or in a batch process. However, CDEs using the new electrolytes demand improved electrode structures. This invention pertains to GDEs and gas diffusion media with new structures for systems using membrane electrode assemblies (MEAs), and automated methods of manufacture that lend themselves to continuous mass production. Unexpected improvements in gas and vapor transport through the electrode are realized by incorporating a new dispersion process in the construction, reformulating the applied mix with solution additives, and creating a novel coating structure on a conductive web. Furthermore, combining these changes with a judicious choice in coating methodology allows one to produce these materials in a continuous, automated fashion.

US Patent:

6444602, Sep 3, 2002

Filed:

Nov 14, 2000

Appl. No.:

09/715458

Inventors:

Michael DeMarinis - Upton MA
Emory S. De Castro - Nahant MA
Robert J. Allen - Saugus MA
Khaleda Shaikh - Woburn MA

Assignee:

DeNora S.p.A.

International Classification:

H01M 488

US Classification:

502101, 204282, 204284, 20429007, 20429014, 204294, 429 40, 429 42, 429 44

Abstract:

Gas Diffusion Electrodes (GDEs) play a pivotal role in clean energy production as well as in electrochemical processes and sensors. These gas-consuming electrodes are typically designed for liquid electrolyte systems such as phosphoric acid and alkaline fuel cells, and are commercially manufactured by hand or in a batch process. However, GDEs using the new electrolytes such as conductive polymer membranes demand improved electrode structures. This invention pertains to GDEs and gas diffusion media with new structures for systems using membrane electrode assemblies (MEAs), and automated methods of manufacture that lend themselves to continuous mass production. Unexpected improvements in gas and vapor transport through the electrode are realized by incorporating a new dispersion process in the construction, reformulating the applied mix with solution additives, and creating a novel coating structure on a conductive web. Furthermore, combining these changes with a judicious choice in coating methodology allows one to produce these materials in a continuous automated fashion.

US Patent:

61030775, Aug 15, 2000

Filed:

Oct 30, 1998

Appl. No.:

9/184089

Inventors:

Michael DeMarinis - Upton MA
Emory S. De Castro - Nahant MA
Robert J. Allen - Saugus MA
Khaleda Shaikh - Woburn MA

Assignee:

De Nora S.p.A.

International Classification:

C25B 1100

US Classification:

20429007

Abstract:

Gas Diffusion Electrodes (GDES) play a pivotal role in clean energy production as well as in electrochemical processes and sensors. These gas-consuming electrodes are typically designed for liquid electrolyte systems such as phosphoric acid and alkaline fuel cells, and are commercially manufactured by hand or in a batch process. However, GDEs using the new electrolytes such as conductive polymer membranes demand improved electrode structures. This invention pertains to GDEs and gas diffusion media with new structures for systems using membrane electrode assemblies (MEAs), and automated methods of manufacture that lend themselves to continuous mass production Unexpected improvements in gas and vapor transport through the electrode are realized by incorporating a new dispersion process in the construction, reformulating the applied mix with solution additives, and creating a novel coating structure on a conductive web. Furthermore, combining these changes with a judicious choice in coating methodology allows one to produce these materials in a continuous, automated fashion.