A hybrid model of cathode of PEM fuel cell using the interdigitated gas distributor

Abstract A two-dimensional (2D), single- and two-phase, hybrid multi-component transport model is developed for the cathode of PEM fuel cell using interdigitated gas distributor. The continuity equation and Darcy's law are used to describe the flow of the reactant gas and production water. The production water is treated as vapor when the current density is small, and as two-phase while the current density is greater than the critical current density. The advection–diffusion equations are utilized to study species transport of multi-component mixture gas. The Butler–Volmer equation is prescribed for the domain in the catalyst layer. The predicted results of the hybrid model agree well with the available experimental data. The model is used to investigate the effects of operating conditions and the cathode structure parameters on the performance of the PEM fuel cell. It is observed that liquid water appears originally in the cathodic catalyst layer over outlet channel under intermediate current and tends to be distributed uniformly by the capillary force with the increase of the current. It is found that reduction of the width of outlet channel can enhance the performance of PEM fuel cell via the increase of the current density over this region, which has, seemingly, not been discussed in previous literatures.

[1]  Trung Van Nguyen,et al.  A Gas Distributor Design for Proton‐Exchange‐Membrane Fuel Cells , 1996 .

[2]  Trung Van Nguyen,et al.  A Two-Dimensional, Two-Phase, Multicomponent, Transient Model for the Cathode of a Proton Exchange Membrane Fuel Cell Using Conventional Gas Distributors [Journal of the Electrochemical Society 148, A1324 (2001)] , 2003 .

[3]  L. B. Wang,et al.  Numerical simulation of a new water management for PEM fuel cell using magnet particles deposited in the cathode side catalyst layer , 2002 .

[4]  Trung Van Nguyen,et al.  Three-dimensional effects of liquid water flooding in the cathode of a PEM fuel cell , 2003 .

[5]  T. Nguyen,et al.  Two-phase flow model of the cathode of PEM fuel cells using interdigitated flow fields , 2000 .

[6]  T. Nguyen,et al.  Multicomponent transport in porous electrodes of proton exchange membrane fuel cells using the interdigitated gas distributors , 1999 .

[7]  M. Kaviany.  Principles of heat transfer in porous media , 1991 .

[8]  Hongtan Liu,et al.  Modelling of performance of PEM fuel cells with conventional and interdigitated flow fields , 1999 .

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

[10]  M. C. Leverett,et al.  Capillary Behavior in Porous Solids , 1941 .

[11]  Hongtan Liu,et al.  Heat transfer enhancement in fuel cells with interdigitated flow field design , 2002 .

[12]  Z. H. Wang,et al.  Two-phase flow and transport in the air cathode of proton exchange membrane fuel cells , 2000 .