Parameter Estimates for a PEMFC Cathode

Abstract

Five parameters of a model of a polymer electrolyte membrane fuel cell cathode (the porosity of the gas diffusion layer, the porosity of the catalyst layer, the exchange current density of the oxygen reduction reaction, the effective ionic conductivity of the electrolyte, and the ratio of the effective diffusion coefficient of oxygen in a flooded spherical agglomerate particle to the squared particle radius) were determined by the least square fitting of experimental polarization curves.

Parameter Estimation and Model Discrimination for a Lithium-Ion Cell

“…The so-called sensitivity approach can be used to achieve a desired accuracy. 21 The sensitivity approach is associated with the solution of sensitivities from sensitivity equations. A sensitivity equation is generated from a model equation by taking the partial derivative on both sides of the model equation with respect to a fitting parameter.…”

“…A nonlinear least squares regression technique such as the Marquardt method is useful for that purpose. [20][21][22] Given that the number of fitting parameters is specified, a unique set of parameter estimates can be obtained by using nonlinear regression.…”

Analysis of carbon-filled gas diffusion layer for H2H2/air polymer electrolyte fuel cells with an improved empirical voltage–current model

“…(12) and (13), it is necessary to determine first the smallest value of current before the voltage deviates from its linear change with the current (i d ). The allover algorithm for these equations consists of the following steps:…”

“…Scan the data and use linear proportional interpolation method to find the i d ; 4. apply Marquardt method to Eq. (12) and (13) and obtain the respective values of E 0 , b, R, m and n.…”

The effects of water and microstructure on the performance of polymer electrolyte fuel cells

“…Adaptivity, a feature of FEMLAB, was not required in the calculations, though was occasionally used to obtain smoother plots. A more detailed discussion of the issues surrounding the measurement of these quantities can be found in [54] and [55].…”