화학공학소재연구정보센터
Journal of Power Sources, Vol.269, 244-249, 2014
SrFe0.75Mo0.25O3-delta impregnated 430L alloys for efficient fuel oxidation in metal supported solid oxide fuel cells
Here we report a novel SrFe0.75Mo0.25O3-delta (SFMO)-430L composite anode for the application in the metal supported solid oxide fuel cells. Such an anode is prepared by coating a thin nano porous and mixed electronic-ionic conducting SFMO layer onto the internal surface of a micron porous 430L alloy backbone. The area specific polarization resistance of the composite anode for hydrogen oxidation can be as low as 0.11 Omega cm(2) at 800 degrees C. The electronic conductivity of the 430L alloy support is found to be critically important for promoting rapid hydrogen oxidation kinetics and attaining such a low polarization resistance as the fuel cell anode. A metal-supported fuel cell with the SFMO impregnated 430L composite anode exhibits outstanding power densities at 800 degrees C, e.g., 0.81 W cm(-2) in hydrogen and 031 W cm(-2) in iso-octane. Preliminary results show that the present SFMO-430L composite anode exhibits much higher tolerance for coking formation than the traditional Ni-based anode. (C) 2014 Elsevier B.V. All rights reserved.