Abstract

In this paper, we report the electrochemical properties of Ni-Ba_0.5Sr_0.5Ce_0.6Zr_0.2Gd_0.1Y_0.1O_3-Delta (BSCZGY) anode composites in 3% H₂O-H₂ for proton conducting solid oxide fuel cells (H-SOFCs). Ni-BSCZGY composites with volume ratio of 30:70, 40:60, and 50:50 were synthesised through mechanical mixing and combustion methods. In combustion method, auto-ignition step led to brown coloured ash, which was calcined at 1000 ^oC for 5 h to form NiO-BSCZGY powder. Screen-printing, co-firing and reduction process were used to prepare the symmetrical cell: Ni-BSCZGY/BSCZGY/Ni-BSCZGY. Ni50-BSCZGY anode exhibited the lowest polarisation resistance (Rp) of 0.8 Omega.cm² and 1.9 Omega.cm² at 710 ^oC under 3% H₂O-H₂, for both mechanically mixed and combustion methods, respectively.

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