The trade-offs among dynamic response, efficiency, and robustness to external factors are fundamental to the optimization of hardware and controls for fuel cell systems. No previously published model of polymer electrolyte membrane fuel cells (PEMFCs) has the capability to simultaneously provide dynamic modeling capabilities, a clear representation of physical configurations, adjustable fidelit...

Under DSTO’s Strategic Research Initiative on Signatures, Materials, and Energy, a project entitled “Hybrid-Propulsion and Power-Management Technologies for Tactical Unmanned Aircraft Systems (UAS)” is underway. Fuel cells have been identified as having the potential to substantially increase the range and endurance of small, electrically-powered fixed-wing aircraft. Herein described are experi...

Temperature, voltage and fuel flow distribution all contribute considerably to fuel cell performance. Conventional methods cannot accurately determine parameter changes inside a fuel cell. This investigation developed flexible and multi-functional micro sensors on a 40 μm-thick stainless steel foil substrate by using micro-electro-mechanical systems (MEMS) and embedded them in a proton exchange...

Abstract We present the results of a life-cycle assessment (LCA) for manufacturing and end-of-life (EoL) phases following fuel-cell hydrogen (FCH) technologies: alkaline water electrolyser (AWE), polymer-electrolyte-membrane (PEMWE), high-temperature (HT) low-temperature (LT) fuel cells (PEMFCs), together with balance-of-plant components. New inventories (LCIs), i.e., material inputs AWE, PEMWE...

Inkjet printing is a deposition technique that has remarkably evolved over the last two decades, becoming widely employed for various applications. Notably, it proven very promising catalyst and ionomer layer in assembling CCM (Catalyst Coated Membranes) of PEMFC (Polymer Electrolyte Membrane Fuel Cells). However, fast drying processed inks at outlet often causes nozzle clogging foam formation ...

In the highly competitive market of fuel cells, solid alkaline fuel cells using liquid fuel (such as cheap, non-toxic and non-valorized glycerol) and not requiring noble metal as catalyst seem quite promising. One of the main hurdles for emergence of such a technology is the development of a hydroxide-conducting membrane characterized by both high conductivity and low fuel permeability. Plasma ...

Polymer electrolyte membrane fuel cells (PEMFC) fed with H2 contaminated with CO may exhibit oscillatory behavior when operated galvanostatically. The self-organization of the anodic overpotential is interesting because it can be accompanied by an increase in the average performance. Herein we report experimental studies of voltage oscillations that emerge in a PEMFC equipped with a Pd/C or PdP...

The influence of the different properties gas diffusion layer (GDL) on operation a liquid-cooled, proton-exchange polymer electrolyte fuel cell (PEMFC) has been studied in this work. Three-dimensional numerical simulations (CFD) have conducted to compare several commercial GDLs with properties, analyzing their performance. Specifically, four (AvCarb P-75, SIGRACET 34BC, 34BA and Toray TGP-H-090...

Fuel cells represent a clean alternative to current technologies for utilizing hydrocarbon fuel resources. Polymer electrolyte membrane fuel cells (PEMFCs) have acquired due importance as they are best suited for applications where a quick start up is required such as in automobiles. The prime requirements of fuel cell membranes are high proton conductivity, low methanol/water permeability, goo...

This paper describes the fuel cell research activities conducted in the National Tsing Hua University in Taiwan. A series of fuel cell power research for transportation were based on the academic fundamentals of the molecular dynamics (MD), fluid dynamics and system dynamics, scoped from micro-scale, messo-scale, macro-scale analyses to the system level of fuel cell vehicle design. Various powe...