Transport in Proton Exchange Membranes for Fuel Cell Applications—A Systematic Non-Equilibrium Approach
AbstractWe hypothesize that the properties of proton-exchange membranes for fuel cell applications cannot be described unambiguously unless interface effects are taken into account. In order to prove this, we first develop a thermodynamically consistent description of the transport properties in the membranes, both for a homogeneous membrane and for a homogeneous membrane with two surface layers in contact with the electrodes or holder material. For each subsystem, homogeneous membrane, and the two surface layers, we limit ourselves to four parameters as the system as a whole is considered to be isothermal. We subsequently analyze the experimental results on some standard membranes that have appeared in the literature and analyze these using the two different descriptions. This analysis yields relatively well-defined values for the homogeneous membrane parameters and estimates for those of the surface layers and hence supports our hypothesis. As demonstrated, the method used here allows for a critical evaluation of the literature values. Moreover, it allows optimization of stacked transport systems such as proton-exchange membrane fuel cell units where interfacial layers, such as that between the catalyst and membrane, are taken into account systematically. View Full-Text
Share & Cite This Article
Rangel-Cárdenas, A.L.; Koper, G.J.M. Transport in Proton Exchange Membranes for Fuel Cell Applications—A Systematic Non-Equilibrium Approach. Materials 2017, 10, 576.
Rangel-Cárdenas AL, Koper GJM. Transport in Proton Exchange Membranes for Fuel Cell Applications—A Systematic Non-Equilibrium Approach. Materials. 2017; 10(6):576.Chicago/Turabian Style
Rangel-Cárdenas, Angie L.; Koper, Ger J.M. 2017. "Transport in Proton Exchange Membranes for Fuel Cell Applications—A Systematic Non-Equilibrium Approach." Materials 10, no. 6: 576.
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.