Abstract
We extend the Poisson–Nernst–Planck model to the case of an electrolytic cell limited by ohmic electrodes that are partially polarizable with different affinities for anions and cations. We show that the finite conductivity of the electrodes in combination with the different ionic diffusion coefficients for anions and cations may give rise to negative capacitance behavior of the cell impedance in the absence of any bias. The range where the negative capacitance character of the electrolytic cell appears is localized. When ambipolar diffusion and electrode polarization effects are simultaneously present, the real part of the electrical impedance shows up to three plateaux.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
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.