Search results for "Composite proton conductors"

showing 3 items of 3 documents

Cs0.86(NH41.14SO4Te(OH)6 in porous anodic alumina for micro fuel cell applications.

2011

Abstract Cs0.86(NH4)1.14SO4Te(OH)6 supported by anodic alumina membranes (AAMs) has been characterized for the first time in H2/O2 fuel cell. The fabricated membrane electrode assemblies are able to produce peak power densities in the range 15–30 mW cm−2 under mild conditions (room temperature, low humidity and low Pt loading) and show an increased durability with cycling with respect to previous results obtained with AAM-based fuel cell. The physico-chemical characterization of the electrolytes has been carried out through X-ray diffractometry, scanning electron microscopy and micro-raman analysis. An estimation of the composite membranes conductance under fuel cell operation has been carr…

Thin film fuel cellScanning electron microscopeChemistryGeneral Chemical EngineeringInorganic chemistryConductanceElectrolytePorous alumina fuel cellCesium ammonium sulphate tellurateAnodeMembraneSettore ING-IND/23 - Chimica Fisica ApplicataChemical engineeringElectrodeComposite proton conductors Porous alumina fuel cell Thin film fuel cell Cesium ammonium sulphate tellurateElectrochemistryComposite proton conductorThin filmPorosity
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Advances in Anodic Alumina Membranes-based fuel cell: CsH2PO4 pore-filler as proton conductor at room temperature

2009

Abstract Anodic alumina membranes (AAM) filled with cesium hydrogen phosphate proton conductor have been tested as inorganic composite electrolyte for hydrogen–oxygen thin film (≤50 μm) fuel cell (TFFC) working at low temperatures (25 °C), low humidity ( T gas  = 25 °C) and low Pt loading (1 mg cm −2 ). Single module TFFC delivering a peak power of around 15–27 mW cm −2 , with open circuit voltage (OCV) of about 0.9 V and short circuit current density in the range 80–160 mA cm −2 have been fabricated. At variance with pure solid acid electrolytes showing reproducibility problems due to the scarce mechanical resistance, the presence of porous alumina support allowed to replicate similar fuel…

Renewable Energy Sustainability and the EnvironmentChemistryOpen-circuit voltageAnodic alumina membranes Cesium hydrogen phosphate Composite proton conductors Pore filling Thin film fuel cellAnalytical chemistryEnergy Engineering and Power TechnologyElectrolyteElectrochemistryDielectric spectroscopySettore ING-IND/23 - Chimica Fisica ApplicataChemical engineeringDifferential thermal analysisElectrical and Electronic EngineeringPhysical and Theoretical ChemistryThin filmShort circuitCesium hydrogen phosphate Anodic alumina membranes Pore filling Composite proton conductors Thin film fuel cellProton conductor
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Nanoscale membrane electrode assemblies based on porous anodic alumina for hydrogen–oxygen fuel cell

2007

In this paper, we demonstrate that nanoscale membrane electrode assemblies, functioning in a H 2/O 2 fuel cell, can be fabricated by impregnation of anodic alumina porous membranes with Nafion® and phosphotungstic acid. Porous anodic alumina is potentially a promising material for thin-film micro power sources because of its ability to be manipulated in micro-machining operations. Alumina membranes (Whatman, 50 μm thick, and pore diameters of 200 nm) impregnated with the proton conductor were characterized by means of scanning electron microscopy, X-ray diffraction, and thermal analysis. The electrochemical characterization of the membrane electrode assemblies was carried out by recording t…

Materials scienceHydrogenAnalytical chemistrychemistry.chemical_elementFuel cells Protons Intermediate temperatureCondensed Matter PhysicsElectrochemistryAnodechemistry.chemical_compoundMembranechemistryChemical engineeringElectrodeElectrochemistryGeneral Materials ScienceComposite proton conductors Hydrogen-oxygen fuel cell Porous anodic aluminaPhosphotungstic acidElectrical and Electronic EngineeringPolarization (electrochemistry)Proton conductorJournal of Solid State Electrochemistry
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