Development of a Novel Electrolyte Supported Solid Oxide Fuel Cell

Abstract:

Solid oxide fuel cell manufacturers require an engineered cell design that decreases ohmic polarization in the electrolyte due to ionic resistance, minimizes concentration polarization in the anode due to extensive diffusion path lengths, reduces laminate layer stresses due to the mismatch between coefficients of thermal expansion (CTE) and provides adequate mechanical strength to endure operating stresses. 

H-Tech's Partner Paul Gentile in collaboration with Montana State University has developed various methods to address these SOFC issues. The innovative techniques MSU is employing in the engineering of a novel electrolyte supported “Uni-Cell” stack design including photo-resist machining and laser drilling of interweaved microstructures on yttria stabilized zirconia (YSZ) electrolytes in the green and sintered states were investigated.  R & D findings from field emission microscopy of cell microstructure, thermal gravitation analysis of electrolytes, mechanical strength testing via concentric ring on ring tests, fuel cell performance voltage-current curves and dilatometer analysis of CTE behavior have been acquired.  

Findings will be presented at the 2007 MS&T Conference in Detroit, MI.