POLARISATION MODELLING OF AN ANODE SUPPORTED SOLID OXIDE FUEL CELL
Authors: *Ighodaro O, Keith S
A polarisation model was developed and validated for an intermediate temperature anode-supported solid oxide fuel cell (SOFC). The model was used to analyse the effects of activation, concentration and ohmic polarisation on the overall polarisation in the cell. The electrochemical active layer was modelled as a distinct electrode layer. The modified Butler-Volmer equation which incorporates the Knudsen diffusion term was used in calculating the activation and concentration polarisation terms while ohms law was used in calculating the cell resistance. The simulation results showed that the activation polarisation and the ohmic polarisation were the most significant contributors to the overall voltage loss in the cell and the magnitude of the concentration polarisation for each distinct layer is dependent on the thickness of the electrode layer.
Affiliations: Department of Mechanical Engineering, Faculty of Engineering, University of Benin, Benin City, Nigeria
Keywords: Polarisation, Anode Support, Intermediate Temperature, Activation, Ohmic
Published date: 2017/06/30