Basic model for membrane electrode assembly design for direct methanol fuel cells

摘要: This research proposes a model that predicts the effect of anode diffusion layer and membrane properties on electrochemical performance methanol crossover direct fuel cell (DMFC) electrode assembly (MEA). It is an easily extensible, lumped DMFC model. Parameters used in this design are experimentally obtainable, some parameters indicative material characteristics. The quantification these builds up database. Model for various membranes layers determined by using techniques such as polarization, mass balance, impedance spectroscopy (EIS), interpretation response to step changes current. Since investigation cover different times DMFC, processes transport, reaction charge can be investigated separately. Properties single MEA systematically varied, subsequent analysis enables identification influence layer's crossover. Finally, case study indicates use with lower diffusivity thicker micro-porous (MPL) yields MEAs but similar power density.