The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 19, 2008
Filed:
Jul. 28, 2003
Jeanette E. O'hara, Rochester, NY (US);
Thomas A. Trabold, Pittsford, NY (US);
Michael R. Schoeneweiss, W. Henrietta, NY (US);
Joerg Roth, Trebur, DE;
Jeanette E. O'Hara, Rochester, NY (US);
Thomas A. Trabold, Pittsford, NY (US);
Michael R. Schoeneweiss, W. Henrietta, NY (US);
Joerg Roth, Trebur, DE;
General Motors Corporation, Detroit, MI (US);
Abstract
A diffusion media and a scheme for spatially varying the parameters of the diffusion media to address issues related to water management in electrochemical cells and other devices employing the diffusion media are provided. A device is configured to convert a hydrogenous fuel source to electrical energy and comprises an electrochemical conversion assembly, first and second reactant inputs, first and second product outputs, and first and second diffusion media. The device is configured such that a mesoporous layer is carried along at least a portion of a major face of one of the first and second diffusion media substrates. The mesoporous layer comprises a hydrophilic carbonaceous component and a hydrophobic component. The mesoporous layer occupies a substantially greater portion of one of the high or low HO regions of the device, relative to the other of the high or low HO region of the device.