Anode-supported BaZr0.8Y0.2O3−δ membranes by tape casting and suspension spraying
Dense BaZr[Formula: see text]Y[Formula: see text]O[Formula: see text] (BZY) proton-conducting electrolyte membranes are successfully fabricated on NiO–BaZr[Formula: see text]Ce[Formula: see text]Y[Formula: see text]O[Formula: see text](NiO–BZCY) using tape casting combined with suspension spraying technique. The NiO–BZCY anode substrates were prepared by the tape-casting method and the BZY electrolyte membranes were prepared on the NiO-BZCY anodes by suspension spraying. The thermal decomposition of the anode green tape prepared by tape casting was investigated by thermogravimetry-differential thermal analysis while the phase structure and the morphology of the anode/electrolyte bi-layers were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). No obvious reaction was found between NiO and BZCY in anode substrates and gas-tight BZY membranes were achieved after co-sintering at 1450[Formula: see text]C. With Sm[Formula: see text]Sr[Formula: see text]CoO[Formula: see text]–Ce[Formula: see text]Sm[Formula: see text]O[Formula: see text](SSC–SDC) as the composite cathode, a maximum power density of 121 mW cm[Formula: see text] was obtained at 650[Formula: see text]C for the single cell with 23 [Formula: see text]m thick BZY electrolyte. Resistances of the tested cell were investigated under open circuit conditions at different operating temperatures by impedance spectroscopy.