... in parallel was tested for 2215 cycles and compared with a single baseline cell. The behaviors of temperature distribution, degradation, and current distribution of the stack were characterized and discussed. Results supported the hypothesis that nonuniform temperature distribution causes nonuniform...

... of polymer electrolyte membrane fuel cell stacks, and more particularly, on the current distribution along the cell. The oxygen concentration decreases along the channel and induces a change in the local electrochemical response; it means that the local current density on the cell is redistributed...

...A. A. Kulikovsky We report a model for coupled temperature and current distributions along the single channel in planar solid-oxide fuel cell stack. Approximate analytical solution to model equations is derived; the solution predicts that air and stack temperatures are close to each other...

... stack, the temperature is at its maximum of 1574 K near the outlets of fuel and air at the same operating temperature. It should be kept in mind that both situations will have effects on the temperature behavior of the stack in reality. The temperature and current distributions of stack models...

... 06 2007 26 08 2008 11 08 2009 contact resistance current density current distribution electrochemical electrodes mass transfer proton exchange membrane fuel cells fuel cells assembly pressure mass transfer resistance electrical contact resistance Proton...

..., at high currents this simplified model overestimates the concentration loss as it cannot account for the improved mass transport near the electrolyte edges. 17 03 2007 18 03 2008 23 02 2009 current density current distribution electrochemical electrodes electrolytes solid oxide...

...Katharina Fischer; Joerg R. Seume The correct prediction of the temperature distribution is a prerequisite for the reliable determination of species and current distributions in any solid oxide fuel cell (SOFC) model. It is even more crucial if the model is intended for the analysis of thermo...

... and Current Distribution of a Polymer Electrolyte Membrane Fuel Cell ,” J. Appl. Electrochem. 0021-891X 10.1023/A:1024184824662 , 34 , pp. 265 – 271 . Williams , M. V. , Kunz , H. R. , and Fenton , J. M. , 2004 , “ Operation of Nafion-Based PEM Fuel Cells With No External...

... density, and flow configuration (co- or counterflow) were changed, and all of the numerical distributions of current density agreed well with the measured distributions by segmented current collector. The current distributions were also obtained from hydrogen/oxygen concentration changes along the gas...

...Pei-Hung Chi; Fang-Bor Weng; Ay Su; Shih-Hung Chan A three-dimensional (3D) model has been developed to simulate proton exchange membrane fuel cells. The model accounts simultaneously for electrochemical kinetics, current distribution, hydrodynamics, and multi-components transport. A single set...

... are not sufficiently humidified. 22 04 2005 10 11 2005 proton exchange membrane fuel cells current density humidity electrochemical electrodes current distribution PEFC current density distribution fuel cell performance Due to its high power density the polymer electrolyte...

... and flows towards the cathode, the anode surface current begins to decline and finally reaches zero. Thereafter, it begins to increase in the opposite direction and reaches a maximum corresponding to N 2 (location of the second interconnect). The current distribution between N 0 and N...