Abstract
Solid oxide fuel cells (SOFCs) can convert the chemical energy stored in hydrocarbon fuels directly into electricity bypassing the many energy transfers that normally occur, (chemical→ heat (steam boiler)→ mechanical (turbine)→ electrical (generator)), when hydrocarbon fuels are combusted to produce electricity. CellTech Power has developed a liquid tin anode (LTA) SOFC that is not damaged by fuels that contain sulfur. This paper develops an analytical electrochemical impedance spectroscopy model from first principals for the the LTA-SOFC anode half cell. The model is in conjunction with experimental data to determine; the average Ohmic resistance, 8.81mΩ, average steady state concentration of tin oxide in liquid tin, 1.09E-9 mol/cm3, effective diffusion coefficient of tin oxide through liquid tin, 0.198 cm2/s, and the pre-exponential factor for the butler volmer equation 2.92E5 C*cm/mol/s.
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