Electrochemical characterization of YBaCo3ZnO7+δ as a stable proton-conducting SOFCs cathode

YBaCo3ZnO7+δ (YBCZ) was synthesized and used as the cathode materials for proton-conducting SOFCs successfully. The single cell, consisting of a BaZr0.1Ce0.7Y0.2O3−δ (BZCY7)–NiO anode substrate, a BZCY7 anode functional layer, a BZCY7 electrolyte membrane and an YBCZ cathode layer, was assembled and tested from 600 to 700 °C with humidified hydrogen (∼3% H2O) as the fuel and static air as the oxidant. An open-circuit potential of 0.98 V and a maximum power density of 307 mW cm−2 at 700 °C were obtained. The measured results indicated that YBCZ has the potential to be a cathode material for proton-conducting SOFCs.