A Performance Study of Solid Oxide Fuel Cells With BaZr_0.1Ce_0.7Y_0.2O_3–δ Electrolyte Developed by Spray‐Modified Pressing Method

Abstract

Abstract Fuel cells with BaZr 0.1 Ce 0.7 Y 0.2 O 3–δ (BZCY) proton‐conducting electrolyte is fabricated using spray‐modified pressing method. In the present study the spray‐modified pressing technology is developed to prepare thin electrolyte layers on porous Ni‐BZCY anode supports. SEM data show the BZCY electrolyte film is uniform and dense, well‐bonded with the anode substrate. An anode‐supported fuel cell with BZCY electrolyte and Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 O 3–δ (BSCF) cathode is characterized from 600 to 700 °C using hydrogen as fuel and ambient air as oxidant. Maximum power density of 536 mW cm –2 along with a 1.01 V OCV at 700 °C is obtained. Impedance spectra show that Ohmic resistances contribute minor parts to the total ones, for instance, only ~23% when operating at 600 °C. The results demonstrate that spray‐modified pressing technology offers a simple and effective way to fabricate quality electrolyte film suitable to operate in intermediate temperature.