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:
Dec. 08, 2009
Filed:
Dec. 20, 2004
Han Liu, Waltham, MA (US);
Robert C. Mcdonald, Stow, MA (US);
Thomas J. Mccallum, Ashland, MA (US);
Anthony B. Laconti, Lynnfield, MA (US);
John Forchione, Ashland, MA (US);
Jeanette O'hara, Honeoye, NY (US);
Joerg Roth, Trebur, DE;
Han Liu, Waltham, MA (US);
Robert C. McDonald, Stow, MA (US);
Thomas J. McCallum, Ashland, MA (US);
Anthony B. LaConti, Lynnfield, MA (US);
John Forchione, Ashland, MA (US);
Jeanette O'Hara, Honeoye, NY (US);
Joerg Roth, Trebur, DE;
Giner Electrochemical Systems, LLC, Newton, MA (US);
Abstract
A gas diffusion electrode and method of making the same. According to one embodiment, the electrode comprises a support layer, a first cushioning layer positioned on top of the support layer, a second cushioning layer positioned on top of the first cushioning layer, and a catalyst layer positioned on top of the second cushioning layer. The support layer is a mechanically stable, electrically-conductive, gas porous substrate, such as carbon fiber paper. The first cushioning layer, which is also gas porous, comprises a non-woven mat of electrically-conductive, chemically-inert fibers, preferably carbon nanofibers, bound together with a polymeric binder, such as polytetrafluoroethylene. The second cushioning layer is similar to the first cushioning layer, except that carbon black or a similar electrically-conductive, chemically-inert particulate material is included in addition to or instead of the fibrous material for the purpose of fine-tuning pore size.