[7] Less electricity is required for electrolysis process in solid oxide regenerative fuel cells (SORFC) due to high temperature.
[9] Zirconia doped with scandia and ceria (10Sc1CeSZ) is also investigated as potential electrolyte in SORFC for hydrogen production at intermediate temperatures (500-750 °C).
It is reported that 10Sc1CeSZ shows good behavior and produces high current densities, with suitable electrodes.
Impedance spectra are realized applying an ac current of 1–2A RMS (root-mean-square) in the frequency range from 30 kHz to 10−1 Hz.
Studies show that Ni/YSZ electrode was less active in reverse fuel cell operation than in fuel cell operation, and this can be attributed to a diffusion-limited process in the electrolysis direction, or its susceptibility to aging in a high-steam environment, primarily due to coarsening of nickel particles.