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Electrochemical and Solid State Letters, Vol.12, No.6, B103-B105, 2009
BaCo0.7Fe0.2Nb0.1O3-delta Perovskite Oxide as Cathode Material for Intermediate-Temperature Solid Oxide Fuel Cells
The cathode material BaCo0.7Fe0.2Nb0.1O3-delta (BCFN) was prepared by the solid-state reaction for intermediate-temperature solid oxide fuel cells (IT-SOFCs). The samples had a cubic perovskite structure. The electrical conductivity was relatively low with a maximum value of 13.89 S cm(-1) at about 800 degrees C. The area specific resistance value for the BCFN cathode was as low as 0.014 Omega cm(2) at 800 degrees C. Using BCFN as the cathode, the Ce0.9Gd0.1O1.95 electrolyte-supported single cell exhibited peak power intensities of 618 mW cm(-2) at 800 degrees C. Preliminary results demonstrated that BCFN is a very promising cathode material for application in IT-SOFCs.
Keywords:barium compounds;cerium compounds;cobalt compounds;electrical conductivity;electrochemical electrodes;electrolytes;iron compounds;sintering;solid oxide fuel cells