Excellent kinetics of single-phase Gd-doped ceria fuel electrodes in solid oxide cells

Abstract

Ceria containing electrodes offer several advantages compared to state-of-the art Nickel-Yttria-Stabilizd Zirconia (Ni-YSZ) cermets, such as higher ionic and electronic conductivities, and a high activity for oxygen exchange reactions on...

Operational Aspects of a Perovskite Chromite-Based Fuel Electrode in Solid Oxide Electrolysis Cells (SOEC)

“…The electrodes were contacted with highly porous Ni foams in a testing chamber of fused silica. These measures decrease the gas diffusion ASR to roughly 0.01 Ω cm 2 . , Four button cells were measured at the same time by using a multiplexing setup . Electrochemical impedance spectroscopy (EIS) was performed in a four-wire mode with a Novocontrol Alpha impedance analyzer in a frequency range from 50 mHz to 100 kHz and an amplitude of the voltage stimulus of 50 mV.…”

Combining electrochemical and quantitative elemental analysis to investigate the sulfur poisoning process of ceria thin film fuel electrodes

“…Before working electrode preparation, a kinetically fast 26 porous GDC counter electrode was deposited on the bottom side of the YSZ electrolyte. For this means, a suspension of GDC particles (250 nm average particle size, Treibacher Industrie AG) in commercial ink vehicle (Fuelcellmaterials, OH, USA) was spin-coated on the single crystal.…”

How the surface state of nickel/gadolinium-doped ceria cathodes influences the electrochemical performance in direct CO2 electrolysis

“…In particular, oxygen ions (O 2-) must be transported via the ionic GDC phase to the YSZ solid electrolyte, while electrons should be transferred towards the current collector. Due to the fact that the electronic conductivity of the NiGDC is at least by 3 orders of magnitude higher than the ionic [43], electrons are transferred considerably faster than ions.…”