Rigorous modeling and experimental validation of mass, charge and energy transport in a DMFC polymer electrolyte membrane
نویسندگان
چکیده
In the past few years, the interest in the Direct Methanol Fuel Cell (DMFC) has increased dramatically, as it has very advantageous features as a mobile source of electrical energy. Its fuel methanol is easy to store and to handle and has a high energy density. These advantages over hydrogen-fed PEMFCs (polymer electrolyte membrane fuel cells) have resulted in first commercial products (e.g. from SmartFuelCell, Germany, www.smartfuelcell.de).
منابع مشابه
Modeling of Nanofiltration for Concentrated Electrolyte Solutions using Linearized Transport Pore Model
In this study, linearized transport pore model (LTPM) is applied for modeling nanofiltration (NF) membrane separation process. This modeling approach is based on the modified extended Nernst-Planck equation enhanced by Debye-Huckel theory to take into account the variations of activity coefficient especially at high salt concentrations. Rejection of single-salt (NaCl) electrolyte is inve...
متن کاملMathematical Modeling of Transport Phenomena in Polymer Electrolyte and Direct Methanol Fuel Cells
This thesis deals with modeling of two types of fuel cells: the polymer electrolyte fuel cell (PEFC) and the direct methanol fuel cell (DMFC), for which we address four major issues: a) mass transport limitations; b) water management (PEFC); c) gas management (DMFC); d) thermal management. Four models have been derived and studied for the PEFC, focusing on the cathode. The first exploits the sl...
متن کاملNumerical Simulation of Non-Uniform Gas Diffusion Layer Porosity Effect on Polymer Electrolyte Membrane Fuel Cell Performance
Gas diffusion layers are essential components of proton exchange membrane fuel cell since the reactants should pass through these layers. Mass transport in these layers is highly dependent on porosity. Many of simulations have assumed, for simplicity, the porosity of GDL is constant, but in practice, there is a considerable variation in porosity along gas diffusion layers. In the present study ...
متن کاملModeling the Transport and Volumetric Properties of Solutions Containing Polymer and Electrolyte with New Model
A new theoretical model based on the local composition concept (TNRF-mNRTL model) was proposed to express the short-range contribution of the excess Gibbs energy for the solutions containing polymer and electrolyte. This contribution of interaction along with the long-range contribution of interaction (Pitzer-Debye-Hückel equation), configurational entropy of mixing (Flory-Huggins relation)...
متن کاملFunctionalized and Electrospun Polymeric Materials as High-Performance Membranes for Direct Methanol Fuel Cell: A Review
Proton exchange membranes (PEM) for a direct methanol fuel cell (DMFC) have main drawbacks which are methanol permeability, reduced proton conductivity and the cost of the membrane. This paper reviews different polymeric materials such as fluorinated, non-fluorinated, acid-base complex, and composite membranes for DMFC. Currently, nonfluorinated membranes gain a lot of atte...
متن کامل