Fabrication of a metal-supported ceria cell by wet powder spray and its characterization at intermediate temperatures

摘要

A tri-layer comprising a lanthanum strontium cobalt iron perovskite cathode, a doped ceria electrolyte and a nickel ceria cermet anode was fabricated on a porous stainless steel substrate by a series of processing steps involving wet powder spraying, lamination and sintering, and was tested with humidified 50 % hydrogen in argon supplied to anode and air supplied to cathode at intermediate temperatures of 650 and 600 \ub0C. Open circuit voltage showed relatively lower values, below 0.75 V, however the cell was found to deliver higher current densities, over 1 A/cm2, and achieved a maximum power density of over 450 mW/cm2 at 650 \ub0C. It was found that the cathode accounted for most of the polarization resistance and that the anode polarization was less influential to the ceria cell tested.