Abstract

This study investigates the influence of cathode thickness on the performance of solid oxide electrolysis cells with 20% H2O–80% N2 at 800 °C. NiFe2O4 (NFO) was used as the cathode material. The thickness of the cathode was controlled to be approximately 10–70 μm. NFO can be considered as a mixed electron and oxide-ion conductor because the cell performance changes with its thickness. Furthermore, the ohmic and polarization resistances decreased significantly when the cathodic thickness increased to 30 μm. The performance improvement was because of the increase in conduction networks. In addition, the electrochemical reaction area increases to lower polarization resistances. However, with a cathodic thickness of 30–70 μm, the ohmic resistance increased significantly because the conduction paths became longer from the current collector to the reaction area. In addition, the polarization resistance increased slightly owing to the difficulty in gas diffusion.

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call

Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.