Electrode Models Based on a Mass Transfer Analysis

2 Electrode Models Based on a Mass Transfer Analysis 

In further development of this model, a finite reaction zone may be introduced and activation overpotential added to the polarisation [44-47]. Kinetic resistance is believed to be particularly important for the cathode (r ca is 

3 One-Dimensional Porous Electrode Models Based on Complete Concentration, Potential, and Current Distributions 

Simplified models that do not make a priori assumptions about one or more dominant resistances are often of the 1-D macrohomogeneous type. The 1-D assumption is similar to that in mass transfer-based models. The assumption of macrohomogeneity, based on work by Newman and Tobias [50], has proven useful in battery and fuel cell electrode modelling. It implies that the microstructure of the electrode is homogeneous at the level of the continuum equations governing mass transfer, heat transfer, and current conduction in the electrode (Eqs. (l)-(7) and (33)-(37)). This type of model can exploit solutions available in chemical reaction engineering practice and has been elaborated by several researchers in that field [51-55], 

Mathematically, the three phases, the solid electrocatalyst, the solid electrolyte, and the gas, are assumed to be present simultaneously at each point. The microstructure of the electrode, which produces the interface between the 

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