Modeling and simulation of a direct methanol fuel cell anode |
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| Affiliation: | 1. Fuel Cell System and Engineering Laboratory, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, PR China;2. Graduate School of the Chinese Academy of Sciences, Beijing 100039, PR China;1. LITEN-DEHT-Laboratoire des Composants pour Pile à combustible, Electrolyseur et Modélisation (LCPEM), CEA-Grenoble, 17 Rue des Martyrs, 38054 Grenoble Cedex 9, France;2. INAC-SP2M-Silicium Nanoélectronique Photonique et Structures (SiNaPS), CEA-Grenoble, 17 Rue des Martyrs, 38054 Grenoble Cedex 9, France;1. School of Marine Science and Technology, Northwestern Polytechnical University, Xi’an, 710072, PR China;2. Building Energy Research Group, Department of Building and Real Estate, The Hong Kong Polytechnic University, Hong Kong, PR China |
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| Abstract: | A mathematical model for the anode of a direct methanol fuel cell (DMFC) is presented. This model considers the mass transport in the whole anode compartment and the proton exchange membrane (PEM), together with the kinetic and ohmic resistance effects through the catalyst layer. The influence of key parameters on methanol crossover and anode performance is investigated. Our results indicate that, at low current density and high methanol concentration, the methanol crossover poses a serious problem for a DMFC. The anodic overpotential and reaction-rate distributions throughout the catalyst layer are more sensitive to the protonic conductivity than to the diffusion coefficient of methanol. Increasing the protonic conductivity can effectively enhance the performance of a DMFC. |
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