LI, Qiang; SUN, Liping; HUO, Lihua; ZHAO, Hui; GRENIER, Jean-Claude

doi:10.1007/s10008-011-1508-3

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LI, Qiang
Key Laboratory of Functional Inorganic Material Chemistry [KLFIMC]

SUN, Liping
Key Laboratory of Functional Inorganic Material Chemistry [KLFIMC]

HUO, Lihua
Key Laboratory of Functional Inorganic Material Chemistry [KLFIMC]

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Journal of Solid State Electrochemistry. 2012, vol. 16, n° 3, p. 1169-1174

Springer Verlag

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The performance of Ca2Fe1.4Co0.6O5-Ce0.9Gd0.1O1.95 (CFC-CGO) composite cathode has been investigated for potential application in intermediate-temperature solid oxide fuel cells (IT-SOFCs). The composite cathodes are prepared and characterized by XRD and SEM, respectively. The electrochemical properties of the composite cathodes are investigated using AC impedance and DC polarization methods from 500 to 700 °C under different oxygen partial pressures. The polarization resistance (R p) decreases with the increase of CGO content in the composite electrode. The addition of 40 wt.% CGO in CFC results in the lowest R p of 0.48 Ω cm2 at 700 °C in air. Oxygen partial pressure dependence study indicates that the charge-transfer process is the rate limiting step for oxygen reduction reaction. CFC-40CGO composite cathode exhibits the lowest overpotential of about 67 mV at a current density of 85 mA cm−2 at 700 °C in air.< Réduire

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Electrochemistry

Characterization and Evaluation of Materials

Energy Storage

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Improved electrochemical performance of Ca2Fe1.4Co0.6O5-Ce0.9Gd0.1O1.95 composite cathodes for intermediate-temperature solid oxide fuel cells

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