Fuel cell flow field plate including non-stoichiometric metal oxide layer

Abstract

A flow field plate or bipolar plate for a fuel cell that includes a combination of non-stoichiometric and a conductive material that makes the bipolar plate conductive, hydrophilic and stable in the fuel cell environment. The non-stoichiometric and the conductive material can be deposited on the plate as separate layers or can be combined as a single layer. Either the non-stoichiometric layer or the conductive layer can be deposited first. In one embodiment, the conductive material is gold.

Dependencies are inferred from the claim text.