Mathematical Modelling of Transport and Reaction in an Innovative Solid Oxide Fuel Cell

摘要

A mathematical model for the description of transport phenomena and reactions in anrninnovative solid oxide fuel cell (IDEAL-Cell) is presented. Modelling focuses on therncentral membrane (CM), a porous composite layer of proton-conducting and anionconductingrnphases between cathodic and anodic compartments where water is produced.rnThe model is based on charge and mass balances using effective parameters (continuumrnapproach) related through percolation theory to morphology and material properties.rnThe model is validated with experimental data, providing an estimation of the kineticrnparameter of water recombination reaction. Simulations show that the main contributionrnto cell polarization resistance is the ohmic resistance of CM, so cell performance can bernimproved by decreasing CM thickness and porosity respectively to 150mm and 40%.