Current, Poor Proton Transport in the CCL

In that case, the local polarization curve of the CCL is given by Equation 4.133. Substituting Equation 5.41 into Equation 4.133, we obtain the local polarization curve for the cathode side of the cell with poor ionic transport in the CCL  

The equation = const, has to be solved together with Equation 5.50. The exact analytical solution of this system is hardly achievable. 

Setting z = 1 here, equating the result to the right side of Equation 5.41 and solving the resulting equation for y gives y = J2X(px- With this, one obtains 

the oxygen concentration decreases parabolically with z, while the local current density decays linearly along the channel. 

Substituting Equations 5.69 and 5.70 into the first term in Equation 5.68, results in the cell polarization curve under ideal oxygen transport in the GDL  

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