Voltage oscillations in Single-Chamber Fuel Cells operating under a C3H8/O2 mixture

Abstract : Single-chamber fuel cells (SCFCs) are an alternative way to conventional SOFCs. Effectively, they do not require any more sealing between anodic and cathodic compartment's as the cell is fed with a mixture of hydrocarbon and oxygen. This paper deals with voltage oscillations observed with an SCFC composed of GDC (Ce0.9Gd0.1O1.95) supported electrolyte, Ni-GDC anode and a BSCF (Ba0.5Sr0.5Co0.8Fe0.2O3-δ) cathode, operating in the temperature range 500-600 °C and under various propane and oxygen mixtures, with a C3H8/O2 ratio between 0.2 and 0.66. Electrical and Thermo-Programmed Oxidation (TPO) measurements combined with SEM observations allowed us proving that these oscillations are due to carbon nanowires deposition/oxidation cycles. A mechanism is proposed to explain this behavior.
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Geoffroy Gadacz, Jean-Paul Viricelle, Christophe Pijolat, Michèle Pijolat. Voltage oscillations in Single-Chamber Fuel Cells operating under a C3H8/O2 mixture. Fuel Cells, Wiley-VCH Verlag, 2013, 13 (6), pp.1032-1039. ⟨10.1002/fuce.201300165⟩. ⟨emse-00958519⟩

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