Anode-supported SOFC with thin film of proton-conducting BaCe_0.8Y_0.2O_3−α by electrophoretic deposition

Abstract

Anode-supported solid oxide fuel cells with a thin layer of proton conducting BaCe_0.8Y_0.2O_3−α (BCY) were fabricated by electrophoretic deposition technique using an organic suspension. BCY green films were formed on a graphite-added NiO–BCY substrate. By the classification of particle size distribution by the suitable period of sedimentation yielded a crack-free green film. Sintering of the crack-free green film at 1450°C yielded a dense layer of BCY with the thickness of about 9.2 ± 0.3 µm after sintering at 1450°C. The BCY thin film on the NiO–BCY substrate exhibited conductivity of 1.6 × 10⁻² S·cm⁻¹ at 600°C and its activation energy was 0.35 eV. The anode-supported single cell with the BCY thin film resulted in the maximum power density of 74.2 mW·cm⁻² at 600°C.