Method of manufacturing integrated bipolar plate/diffuser components for proton exchange membrane fuel cells
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United States of America Patent
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Issued Date -
Jun 7, 2007
app pub date -
Dec 5, 2005
filing date -
Dec 5, 2005
priority date (Note) -
Abandoned
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Abstract
A method of making an integrated bipolar plate/diffuser fuel cell component comprising the steps of: (a) directing a stream of precursor material into a molding tool, wherein the stream of precursor material comprises a mixture of an electrically conductive fiber, a binder, and a carrier fluid; (b) molding the precursor material into a monolithic preform having a porous region having a porous surface, and at least one reactant channel; (c) curing or solidifying the binder to impart a desired level of rigidity to the preform; and (d) infiltrating a portion of the porous region with a matrix material to form a hermetic region of the preform to obtain the bipolar plate/diffuser fuel cell component, wherein the matrix material contains no chemical vapor infiltration carbon. This component can be mass-produced at a fast rate with a relatively low cost. The integrated component has a reduced contact resistance or ohmic loss when used in a fuel cell system.
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