Papers – Page 3 – TechConnect Briefs

Influence of the Microstructure of the Catalyst Layer on the Performance of the PEMFC Cathode

Fontes E., Schumacher J., Vasileiades N., Parhammar O., Schmitz A., COMSOL Inc., US

This paper presents a model of a unit cell of a PEMFC for applications in portable electronic devices. The model introduces the transport resistance exerted by the electrolyte confined in the active layer using a [...]

Computational Modelling and Structural Studies of Perfluoro Sulfonate Ionomer Membranes

Elliott J.A., University of Cambridge, UK

Perfluoro sulfonate ionomer membranes (PIMs) consist of a Teflon (PTFE) backbone with sulfonic acid groups periodically substituted along the chain, and are of great commercial interest due to their peculiar ion transport properties. In particular, [...]

Ab-initio Molecular Dynamics of CH3OH at the H2O/Pt interface

Mattsson T.R., Paddison S.J., Sandia National Laboratories, US

Among the engineering achievements, including a reduction in the overall cost of the system, necessary for Direct Methanol Fuel Cells (DMFC) to become a competitive alternative for both portable and stationary power applications, are improved [...]

Voltage Current Curve of a PEM Fuel Cell

Kulikovsky A.A., Research Center - Juelich, DE

First we consider 1D problem of the cathode catalyst layer (CCL) performance. The general solution is presented and simple analytical formulas for CCL polarization voltage are obtained. Based on these formulas we build a simple [...]

CFD-Based PEM Fuel Cell Models and Applications

Liu H., Zhou T., University of Miami, US

In recent years, various fuel cell models based on computational fluid dynamics (CFD) have been developed at the Fuel Cell Laboratory, University of Miami. These 2-or 3-dimensional models account for all the major transport phenomena [...]

Mathematical Modeling of Water Management in PEM Fuel Cells

Berg P., Promislow K., Stockie J., Wetton B., Simon Fraser University, CA

Liquid water is fundamental to Polymer Electrolyte Membrane fuel cells (PEMFC). Its influence, both beneficial and parasitic, is measured on time scales from femto-seconds to hours, on length scales from Angstroms to centimeters. Its role [...]

PEM Fuel Cells

Paddison S., Los Alamos National Lab, US

Micromachined pressure sensors have been reported since the late 1950’s. Their application to a wide variety of commercial products was largely completed by 1990. Nonetheless, there continues to be a commercial need for pressure sensors, [...]

Equilibrium Structure of Electrolyte calculated using Equilibrium Monte Carlo, Molecular Dynamics, and Boltzmann Transport Monte Carlo Simulations

van der Straaten T.A., Kathawala G., Kuang Z., Boda D., Chen D.P., Ravaioli U., Eisenberg R.S., Henderson D., University of Illinois, US

We use the pair correlation function as a benchmark calculation to compare three simulation methodologies -Equilibrium Monte Carlo, Molecular Dynamics, and Boltzmann Transport Monte Carlo. The three simulation approaches handle electrostatic boundary conditions and ion-water [...]

Self-Consistent Particle-Based Simulations of Three-Dimensional Ionic Solutions

Wigger-Aboud S., Saraniti M., Eisenberg R.S., Rush University and IIT, US

Ion channels are an important class of proteins responsible for controlling the ion flux into and out of cells, and are interesting in the electronics community for their possible application for new classes of electronics [...]

Ionic Diffusion Through Protein Channels: From molecular description to continuum equations

Nadler B., Schuss Z., Singer A., Eisenberg R.S., Yale University, US

Diffusion of particles through a microscopic region, as in ionic permeation through protein channels, is an important phenomenon in many diverse fields. Permeation through ion channels occurs on a microsecond time scale, far longer than [...]