Effect of CeO2 Infiltration on the Hybrid Direct Carbon Fuel Cell Performance
In this study the performance of anode supported NiO/YSZ│YSZ│LSM/YSZ cells towards direct carbon oxidation has been measured. Particularly, the effect of both CeO2 infiltration into the NiO/YSZ anode and CeO2 infiltration of solid carbon have been investigated between 750°C and 815°C through the use of polarization curves and electrochemical impedance spectroscopy (EIS). The impedance spectra are modeled and discussed with the objective to study the effect of CeO2 infiltration on the processes dominating the impedance response of the anode.
Figures 1 and 2 show the Nyquist plots of the impedance spectra for the CeO2 infiltrated anode cell and the blank cell, respectively. The spectra were recorded at open circuit potential at 815°C, 800°C and 760°C in the presence of 96% N2 and 4% CO2.