POROUS GAS-PERMEABLE SUBSTRUCTURE LAYER OF A THIN GAS IMPERVIOUS LAYER FOR USE AS FUNCTIONAL COMPONENT IN HIGH TEMPERATURE FUEL CELLS

摘要

PURPOSE: Provided is a porous gas-permeable substructure layer of a thin gas impervious layer, which is used as a functional component in high temperature fuel cells. CONSTITUTION: Porous gas-permeable sub-structure has a smooth surface formed by a sealed edge zone. The edge zone and a support structure surrounding the zone are produced from a uniform material mixture of sinterable particles. The porosity of the support structure is 30vol.%, preferably 40vol.%. The pore size of the edge zone is 10μm, preferably 3μm or less. An electrochemically active element contains the sub-structure.