Anode-supported LaGaO3-based electrolyte SOFCs with Y2O3-doped Bi2O3 and La-doped CeO2 buffer layers

Anode-supported solid oxide fuel cells (SOFCs) with strontium- and magnesium-doped lanthanum gallate (LSGM) have been developed. A novel buffer layer, yttria-doped bismuth oxide (YDB), has been introduced between the cathode and electrolyte interface, while a conventional buffer layer, lanthanum-doped ceria (LDC), has been used between the anode and electrolyte interface. A cell with a YDB (18 μm)/LSGM (19 μm)/LDC (13 μm) composite electrolyte film showed an open-circuit voltage (OCV) 1.07–1.0 V in the operating temperature range of 500–700 °C. The cell using Ag–YDB composite cathode can achieve 701 mW cm−2 maximum power density at 700 °C.