In this paper, a macro-model of the proton exchange membrane fuel cell (PEMFC) stack is proposed. A comparative study is made by simulation for the proposed PEMFC macro-model and a reported PEMFC impedance model, which use for PEMFC dynamic a transfer function and an electrical circuit, respectively. The macro-model approximates the theoretical PEMFC current–voltage characteristic by a controll...

Polymer electrolyte membrane fuel cells need initial conditioning, activation or break-in the first time they are operated after being assembled. During this period performance of the fuel cell improves until it reaches its nominal performance. The exact mechanism of this initial conditioning is not completely understood, but it is assumed that during the conditioning process the polymer membra...

Recently mesoporous materials have drawn great attention in fuel cell related applications, such as preparation of polymer electrolyte membranes and catalysts, hydrogen storage and purification. In this mini-review, we focus on recent developments in mesoporous electrocatalysts for polymer electrolyte membrane fuel cells, including metallic and metal-free catalysts for use as either anode or ca...

Fuel cells in the near future are going to challenge recent strong progress of battery-based energy system. Despite many challenges, including material composition, storage and distribution, hydrogen fuel cell has demonstrated its potential trucking fleet transportation systems due ability be safely transported used resulting sharp drop CO 2 particulate emissions. Review works revealed that Pro...

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. fr...

As the hydrogen market is projected to grow in next decades, development of more efficient and better-performing polymer electrolyte membrane fuel cells (PEMFCs) certainly needed. Water management one main issues faced by these devices strictly related employment fluorinated materials gas diffusion medium (GDM). Fluorine-based polymers are added as hydrophobic agents for layers (GDL) or ink com...

The design and operation of a differential polymer electrolyte membrane (PEM) fuel cell is described. The fuel cell design is based on coupled stirred tank reactors (STRs) coupled through a membrane; the gas phase in each reactor compartment is well mixed. The characteristic times for reactant flow, gas phase diffusion, and reaction were chosen so that the gas compositions at both the anode and...

Key performance characteristics of Proton Exchange Membrane (PEMFC) and Solid Oxide Fuel Cell (SOFC) are compared with emphasis on the sustainability energy pathways showing that hydrogen for use in PEMFC is best supplied from renewable hydrogen.