*Correspondence: Peiwen Li , Department of Aerospace and Mechanical Engineering, The University of Arizona, 1130 North Mountain Avenue, Tucson, AZ 85721, USA e-mail: [email protected] In this study, a significant number of experimental tests to proton exchange membrane (PEM) fuel cells were conducted to investigate the effect of gas flow fields on fuel cell performance. Graphite plates w...

Polymer electrolyte membrane (PEM) fuel cells are highly efficient energy converters and provide electrical energy, cathode exhaust gas with low oxygen concentration and water. They are investigated as replacement for auxiliary power units (APU) that are currently used for electrical power generation on aircraft. For generation of oxygen depleted cathode exhaust air (ODA) oxygen concentration m...

Title of Document: IN SITU PROCESSING OF PtSn ELECTROCATALYSTS FOR CO TOLERANCE IN PEM FUEL CELLS Robert Utz, Master of Science, 2011 Directed By: Professor Greg Jackson Department of Mechanical Engineering Improved anode CO tolerance is a promising approach for integrating lowtemperature PEM fuel cells with hydrocarbon fuel processors in cost-effective systems for portable and stationary power...

Hydrogen fuel cells are increasingly seen as the propulsion technology of the future for road transport. However, despite the potential of this technology to reduce the environmental impact of road transport and to improve energy efficiency, both technical and economic barriers need to be overcome for it to be successfully introduced in mass markets. At Imperial College we are currently underta...

The flow field of a bipolar plate distributes hydrogen and oxygen for polymer electrolyte membrane (PEM) fuel cells and removes the produced water from the fuel cells. It greatly influences the performance of fuel cells, especially regarding reduction of mass transport loss. Flow fields with good reactant distribution capability reduce the mass transport loss, thus allowing higher power density...

In this review, we report on the use of low pressure plasmas for elaborating materials at the heart of solid polymer fuel cells (SPFC), especially electrodes and the membrane electrolyte. Electrodes are formed using plasma sputtering techniques while the ion conducting membranes are built up using plasma polymerization. Fuel cell performance will be improved by these approaches. The electrode c...

Fuel cells output power depends on the operating conditions, including cell temperature, oxygen pressure, hydrogen tempureter . In each particular condition, there is only one unique point for a fuel system with maximum output. Thus, tracking (MPPT) controller needed to increase efficiency of PEMFC systems. this paper an efficient method fuzzy logic proposed MPPT proton exchange membrane (PEM) ...

PEMFCs depend on proper water management to obtain high power density and energy efficiency. Traditionally, water management has been addressed by system design and engineering. That is, by adding auxiliary systems to the basic fuel cell system to provide humidification to the anode and remove water from the cathode. This approach adds significant complexities and costs and reduces the overall ...

D ow nladed ro The availability of low-cost, efficient, and durable catalysts for oxygen reduction reaction (ORR) is a prerequisite for commercialization of the fuel cell technology. Along with intensive research efforts of more than half a century in developing nonprecious metal catalysts (NPMCs) to replace the expensive and scarce platinum-based catalysts, a new class of carbon-based, low-cos...