Tuesday, June 12, 2007

US Patent 7229944 - Carbon fiber sheet


Catalytic membranes are a component of fuel cells that can help speed up reactions and improve efficiency. This patent from M.I.T. discloses catalytic membranes formed using carbon nanofibers. Claim 1 reads:

1. A structure comprising: a carbon fiber sheet-like structure having a thickness of less than 10 microns and including at least one carbon fiber having a length of greater than about 500 microns; and a catalytic material supported on the carbon fiber sheet-like structure, wherein carbon fiber of the structure has an average diameter of less than about 500 nanometers.

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