High-Performance Electrode for Steam Electrolysis

Abstract

We have developed a high-performance cathode for solid oxide electrolysis cells (SOECs) for hydrogen production. Mixed conducting samaria-doped ceria (SDC) particles were employed in combination with highly dispersed Ni electrocatalysts. The Ni (8 vol %) dispersed SDC cathode exhibited very high performance at a water vapor pressure >0.4 atm at 900°C. An SOEC, comprised of Ni-dispersed SDC cathode, anode with SDC interlayer, and YSZ electrolyte, exhibited fairly high performance; IR-free cell V at 0.50 A cm⁻² and 900°C under the atmosphere of atm, atm), and (1 atm). © 2004 The Electrochemical Society. All rights reserved.