An electrochemical fuel cell having a membrane electrode assembly and a flow field adjacent thereto wherein the flow field comprises an electrically conductive porous material having a porosity of at least about 50 percent and a mean pore size of at least about 35 microns. This fuel cell is able to operate...http://www.google.ca/patents/US6312845?utm_source=gb-gplus-sharePatent US6312845 - Macroporous flow field assembly
