A fuel cell device comprising an elongate substrate having a length that is the greatest dimension whereby the elongate substrate exhibits thermal expansion along a dominant axis that is coextensive with the length, a reaction zone along a first portion of...

A fuel cell device comprising a ceramic support structure (29) having a reaction zone (32) configured to be heated to an operating reaction temperature, and having at least a first active layer therein in the reaction zone; a first active cell in the first...

A solid oxide fuel cell device (10) comprising an elongate substrate having an exterior surface, an interior solid support structure, and a length that is the greatest dimension whereby the elongate substrate exhibits thermal expansion along a dominant axi...