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. 2013 Aug 15;3:2426. doi: 10.1038/srep02426

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Electrochemical properties of PrBa_0.5Sr_0.5Co_2−xFe_xO_5+δ in fuel cells (a) Arrhenius plot of reciprocal ASR for PrBa_0.5Sr_0.5Co_2−xFe_xO_5+δ-GDC (x = 0, 0.5, and 1.0) cathode. The inset shows the ASR of PBSCF05-GDC cathode measured at 600°C in air under open-circuit conditions. (b) I–V curves and the corresponding power densities of test cells with PBSCF05-GDC cathode using humidified H₂ (3% H₂O) as the fuel and ambient air as the oxidant to the cathode at 500 ~ 650°C. (c) Peak power densities of cells with LnBa_0.5Sr_0.5Co_1.5Fe_0.5O_5+δ-GDC (Ln = Pr and Nd) cathode. (d) Short term stability measurement for a test cell, Ni-GDC | GDC | PBSCF05-GDC, at a constant cell voltage of 0.6 V at 550°C.