caa a22 4500 47704896X CHVBK 20180405111337.0 cr unu---uuuuu 170330e19960601xx s 000 0 eng 10.1007/BF00253453 doi (NATIONALLICENCE)springer-10.1007/BF00253453 Influence of rib spacing in proton-exchange membrane electrode assemblies [Elektronische Daten] [A. West, T. Fuller] A two-dimensional design analysis of a membrane-electrode assembly for a proton-exchange membrane fuel cell is presented. Specifically, the ribs of the bipolar plates restrict the access of fuel and oxidant gases to the catalyst layer. The expected change in cell performance that results from the partial blocking of the substrate layer is studied by numerical simulation of the oxygen electrode and the membrane separator. The effects of rib sizing and the thickness of the gas-diffusion electrode on the current and water distributions within the cell are presented. For all of the cases considered, the two-dimensional effect only slightly alters the half-cell potential for a given applied current but has a significant influence on water management. Concentrated solution theory with variable transport properties is used in the membrane electrolyte to solve for the electrical potential and local water content. The Stefan-Maxwell equations are used in the gas-diffusion electrode to determine the local mole fractions of nitrogen, oxygen and water vapour. A control-volume formulation is used for the resolution of the coupled nonlinear differential equations. One advantage of the control-volume approach over finite-difference methods is the relative ease in which internal boundary points in fuel-cell and battery models are handled. This and other advantages are briefly discussed. Chapman & Hall, 1996 West A. Department of Chemical Engineering, Materials Science, and Mining Engineering, Columbia University, 10027, New York, NY, USA aut Fuller T. International Fuel Cells, 06074, South Windsor, Connecticut, USA aut Journal of Applied Electrochemistry Kluwer Academic Publishers 26/6(1996-06-01), 557-565 0021-891X 26:6<557 1996 26 10800 https://doi.org/10.1007/BF00253453 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00253453 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- West A. Department of Chemical Engineering, Materials Science, and Mining Engineering, Columbia University, 10027, New York, NY, USA aut NATIONALLICENCE 700 1- Fuller T. International Fuel Cells, 06074, South Windsor, Connecticut, USA aut NATIONALLICENCE 773 0- Journal of Applied Electrochemistry Kluwer Academic Publishers 26/6(1996-06-01), 557-565 0021-891X 26:6<557 1996 26 10800 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer