The porous, self-supporting, elongated electrode is made, having at least two chambers through its axial length, the chambers separated by an electronically conductive member. This electrode can be an air electrode of a fuel cell, having a superimposed solid electrolyte and fuel electrode....http://www.google.co.uk/patents/US4888254?utm_source=gb-gplus-sharePatent US4888254 - Low circumferential voltage gradient self supporting electrode for solid oxide fuel cells
