Intermediate Temperature H+-SOEC with Proton Conducting BaZr0.6Ce0.2Y0.2O3−δ Electrolyte

Abstract

BaCe0.8Y0.2O3-δ (BCY) has high proton conductivity but is less stable against CO2 and steam. The solid solution BaZr x Ce1-x-y YyO3-δ (BZCY) tend to be more tolerant to CO2 and steam with increasing Zr contents. In this work, cathode-supported thin film cell was fabricated using BaZr0.6Ce0.2Y0.2O3-δ with higher Zr contents for the electrolyte of proton conducting solid oxide steam electrolysis cell (H+-SOEC). The cell composed of LSCF|BZCY622|Ni-BZCY622 yielded electrolysis currents of 330 and 200 mA cm-2 at 700 and 600°C, respectively, at 1.5 V bias.