Simulation studies on the fuel electrode of a H2O2 polymer electrolyte fuel cell

The macro-homogeneous porous electrode theory is used to develop a model which describes the catalyst layer of the hydrogen electrode formed by catalyst particles that are bonded to the membrane. The water transport in the catalyst layer and polymer electrolyte membrane is considered. The effects of catalyst layer structure parameters such as polymer volume fraction, catalyst layer thickness, platinum loading and reactant gas humidity as well as CO poison on the hydrogen electrode behavior are examined. The results show that the catalyst layer thickness has a significant effect on the electrode performance. A thicker catalyst layer will result in a larger ohmic voltage loss and higher catalyst cost. The optimal polymer volume fraction and catalyst layer thickness are 0.5 and 1.5–4 μm, respectively, for this electrode. An optimal platinum surface coverage on carbon need not exceed 20% (20 wt% Pt/C). Larger platinum coverage will increase the cost, but only slightly enhance the electrode performance.

[1]  Michael B. Cutlip,et al.  Voltage Losses in Fuel Cell Cathodes , 1980 .

[2]  M. Verbrugge.  Methanol Diffusion in Perfluorinated Ion‐Exchange Membranes , 1989 .

[3]  P. Stonehart,et al.  Effect of poisons on kinetic parameters for platinum electrocatalyst sites , 1972 .

[4]  Edson A. Ticianelli,et al.  Dependence of performance of solid polymer electrolyte fuel cells with low platinum loading on morphologic characteristics of the electrodes , 1991 .

[5]  Mark W. Verbrugge,et al.  Ion and Solvent Transport in Ion‐Exchange Membranes I . A Macrohomogeneous Mathematical Model , 1990 .

[6]  J. Giner,et al.  The Mechanism of Operation of the Teflon‐Bonded Gas Diffusion Electrode: A Mathematical Model , 1969 .

[7]  K. Prater.  The renaissance of the solid polymer fuel cell , 1990 .

[8]  Dawn Bernardi,et al.  Water‐Balance Calculations for Solid‐Polymer‐Electrolyte Fuel Cells , 1990 .

[9]  P. Stonehart,et al.  Reaction pathways and poisons—II: The rate controlling step for electrochemical oxidation of hydrogen on Pt in acid and poisoning of the reaction by CO , 1975 .

[10]  R. F. Hill,et al.  Experimental and theoretical investigation of perfluorosulfonic acid membranes equilibrated with aqueous sulfuric acid solutions , 1988 .

[11]  J. Newman,et al.  Porous‐electrode theory with battery applications , 1975 .

[12]  S. Mukerjee.  Particle size and structural effects in platinum electrocatalysis , 1990 .

[13]  Mark W. Verbrugge,et al.  Analysis of Promising Perfluorosulfonic Acid Membranes for Fuel‐Cell Electrolytes , 1990 .

[14]  T. Springer,et al.  Polymer Electrolyte Fuel Cell Model , 1991 .