Abstract

A time-accurate transient model of an anode-supported solid-oxide-fuel-cell (SOFC) membrane-electrode assembly (MEA) is developed and used as the basis for simulating electrochemical impedance spectra (EIS). The one-dimensional model includes porous-media transport, elementary heterogeneous chemical reaction, ion conduction, and electrochemical charge transfer. Porous-media transport is represented by the dusty-gas model and electrochemical charge-transfer is modeled with a modified Butler–Volmer formulation. A button-cell configuration is used, with the fuel and air flows modeled as perfectly stirred reactors. Impedance spectra are determined by imposing oscillating electric currents over a range of frequencies and observing the resulting cell voltage. Results are discussed for hydrogen and methane fuels, including the effects of internal methane reforming chemistry.

Full Text
Paper version not known

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.