Performance Of Strontium- And Magnesium-doped Lanthanum Gallate Electrolyte With Lanthanum-doped Ceria As A Buffer Layer For It-sofcs

摘要

La_(0.8)Sr_(0.2)Ga_(0.8)Mg_(0.2)O_(2.8) (LSGM8080) powder, showing the highest electrical conductivity among LSGMs of various compositions, is synthesized using the glycine nitrate process (GNP) and used as the electrolyte for an intermediate-temperature solid oxide fuel cell (IT-SOFC). The LDC (Ce_(0.55)La_(0.45)O_(1.775)) powder is synthesized by a solid-state reaction and employed as the material for a buffer layer to prevent the reaction between the anode and electrolyte materials. The LDC also serves as the skeleton material for the anode. An anode-supported single cell with an active area of 1 cm2 is constructed for performance evaluation. A single-cell test is performed at 750 and 800 C. The maximum power density of the cell 459 and 664mW cm~(-2) at 750 and 800 C, respectively.