Jump to main content
Jump to site search

Issue 47, 2009
Previous Article Next Article

Impedance spectra of mixed conductors: a 2D study of ceria

Author affiliations

Abstract

In this paper we develop an analytical framework for the study of electrochemical impedance of mixed ionic and electronic conductors (MIEC). The framework is based on non-equilibrium thermodynamics and it features the coupling of electrochemical reactions, surface transport and bulk transport processes. We utilize this work to analyze two-dimensional systems relevant for fuel cell science via the finite element method (FEM). Alternate current impedance spectroscopy (AC-IS or IS) of a ceria symmetric cell is simulated near equilibrium conditions (zero bias) for a wide array of working conditions including variations of temperature and H2 partial pressure on a two-dimensional doped ceria sample with patterned metal electrodes. The model shows agreement between computed IS curves and the experimental literature where the relative error on the impedance is consistently below 2%. Important two-dimensional effects such as the impact of thickness decrease and the influence of variable electronic and ionic diffusivities on the impedance spectra are also explored.

Graphical abstract: Impedance spectra of mixed conductors: a 2D study of ceria

Back to tab navigation

Publication details

The article was received on 17 Apr 2009, accepted on 23 Sep 2009 and first published on 27 Oct 2009


Article type: Paper
DOI: 10.1039/B907740E
Citation: Phys. Chem. Chem. Phys., 2009,11, 11243-11257
  •   Request permissions

    Impedance spectra of mixed conductors: a 2D study of ceria

    F. Ciucci, Y. Hao and D. G. Goodwin, Phys. Chem. Chem. Phys., 2009, 11, 11243
    DOI: 10.1039/B907740E

Search articles by author

Spotlight

Advertisements