"The current-voltage characteristics and partial pressure dependence of defect controlled electrochemical reactions on mixed conducting oxides"

<p>Oxygen exchange reaction rates on mixed conducting perovskite electrodes are described as a function of defect concentrations, see <a href="http://elchinfo.cta.tuwien.ac.at/pmwiki/uploads/Profiles/Schmid_JESoc.pdf">The current-voltage characteristics and partial pressure dependence of defect controlled electrochemical reactions on mixed conducting oxides</a> for a detailed description.</p> <p>Here, (exchange) currents, polarization resistances, <span class="math-tex">\(p_{\rm{O_2}}\)</span> dependencies and Tafel-slopes are calculated as function of&nbsp;<span class="math-tex">\(p_{\rm{O_2}}\)</span> and overpotential for different possible reaction mechnisms. The defect concentrations are taken from the model material La_0.6Sr_0.4FeO_{3-<span class="math-tex">\(\delta\)</span>}, and listed in Brouwer_Bias.csv as a function of&nbsp;<span class="math-tex">\(p_{\rm{O_2}}\)</span> and overpotential.</p> <p>Model 7 describes a molecular mechanisms wothout adsorption limitation, model 8 includes adsorption limitation. Likewise Models 10 and 11 describe atomic mechanisms without and with adsorption limitation, respectively.</p> <p>Overpotentials are listed in V, oxygen partial pressures in bar, defect concentrations in defects per unit cell and currents are in arbitrary units as are resistances.</p> <p>Partial pressure and overpotential dependencies (p and n slopes) are given as <span class="math-tex">\(\frac{\partial \ln j}{\partial\ln p_{\rm{O_2}}}\)</span>(unitless) and <span class="math-tex">\(\frac{\partial \ln j}{\partial\eta}\)</span>(/V), and likewise with resistances instead of currents (rp and rn slopes), respectively.</p> <p>The source code for this project is available at: https://github.com/AlexSchmid22191/EIS_R_Sim</p>