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

摘要

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 mu m)/LSGM (19 mu m)/LDC (13 mu m) composite electrolyte film showed an open-circuit voltage (OCV) 1.07-1.0 V in the operating temperature range of 500-700 degrees C. The cell using Ag-YDB composite cathode can achieve 701 mW cm(-2) maximum power density at 700 degrees C.

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