Results of analysis and major parameters in CL affecting performance

3 Results of analysis and major parameters in CL affecting performance 

is the oxygen concentration in the gas channel, and it is given as an average concentration 

The above shows that it is effective to reduce the thickness of the polymer electrolyte and to decrease the CL thickness to maintain a low oxygen diffusion resistance in the polymer electrolyte and a high proton conductivity in the CL. Thus, it is possible to investigate dominant parameters and evaluate suitable structures of the CL for various conditions using the evaluation Equations (1.10) and (1.12). Additionally, previous studies by the authors have shown that the ratio of oxygen concentration in the polymer electrolyte to that in the gas phase at the polymer-gas interface, y, is a highly critical parameter (Tabe et aL, 2011). 

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