Electrochemical effects of cobalt doping on (La,Sr)(Ga,Mg)O_(3-δ) electrolyte prepared by aerosol deposition

摘要

(La,Sr)(Ga,Mg)O_(3-δ) and (La,Sr)(Ga,Mg,Co)O_(3-δ) electrolytes were aerosol deposited on conventionally sintered NiO-GDC anode substrates at room temperature to minimize reactions between them. Composite cathodes comprising (La,Sr)(Co,Fe)O_(3-δ) and poly-vinylidene fluoride were similarly deposited at room temperature. Both electrolytes and cathode maintained good adhesion. Cobalt in the electrolyte reduced open cell voltage (～0.8 V vs. ～1.1 V) probably due to the decrease of ionic transfer number, and increased maximum power density (～0.8W/cm~2 vs. ～0.5W/cm~2 at 650℃) by increasing ionic conductivity.