In situ drop-coated BaZr_(0.1)Ce_(0.7)Y_(0.2)O_(3-δ) electrolyte-based proton-conductor solid oxide fuel cells with a novel layered PrBaCuFeO_(5+δ) cathode

摘要

In order to develop a simple and cost-effective route to fabricate proton-conductor intermediate-temperature SOFCs, a dense BaZr_(0.1)Ce_(0.7)Y_(0.2)O_(3-δ) (BZCY) electrolyte was fabricated on a porous anode by in situ drop-coating. The PrBaCuFeO_(5+δ) (PBCF) composite oxide with layered perovskite structure was synthesized by auto ignition process and examined as a novel cathode for proton-conductor IT-SOFCs. The single cell, consisting of PBCF/BZCY/NiO-BZCY structure, was assembled and tested from 600 to 700℃ with humidified hydrogen (～3% H_2O) as the fuel and the static air as the oxidant. An open-circuit potential of 1.01 Vand a maximum power density of 445 mWcm~(-2) at 700℃ were obtained for the single cell. A relatively low interfacial polarization resistance of 0.15Ωcm~2 at 700℃ indicated that the PBCF is a promising cathode for proton-conductor IT-SOFCs.