Stable conductive and hydrophilic fuel cell contact element
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United States of America Patent
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Issued Date -
Jan 4, 2007
app pub date -
Jun 30, 2005
filing date -
Jun 30, 2005
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Abandoned
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Abstract
A flow field plate or bipolar plate for a fuel cell that includes a metal oxide coating that makes the bipolar plate conductive, hydrophilic and stable in the fuel cell environment. Non-limiting examples of suitable doped coatings Ta doped TiO.sub.2, Nb doped TiO.sub.2 and F doped SnO.sub.2. In an alternate embodiment, the metal oxide is a non-stoichiometric metal oxide that includes oxygen vacancies in the lattice structure that provides the conductivity. Non-limiting examples of suitable non-stoichiometric metal oxides include TiO.sub.2-x and TiO.sub.2+y.
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