Characterization of La_(0.995)Ca_(0.005)NbO_4/Ni anode functional layer by electrophoretic deposition in a La_(0.995)Ca_(0.005)NbO_4 electrolyte based PCFG

摘要

The Electrophoretic Deposition (EPD) technique has been applied to the preparation of a porous La_(0.995)Ca_(0.005)NbO_4/Ni composite anode layer, deposited on a porous pre-sintered La_(0.995)Ca_(0.005)NbO_4/Ni support. Powders of Lao.ggsCao.oosNbCU and NiO were suspended in a solution of acetylacetone, iodine and water. Selectivity in the composition of the deposited layer was analyzed as a function of the suspension compositions and deposition conditions. A quasi-symmetrical cell was produced by depositing La_(0.995)Ca_(0.005)NbO_4 electrolyte layer on the anode layer by EPD, and by applying a porous La_(0.995)Ca_(0.005)NbO_4/Ni counter electrode on the dense electrolyte layer by brushing. The performance of the electrodes was evaluated by electrochemical impedance spectroscopy in 3% wet H_2.