Objectif "Alarming environmental concerns and the decline of supply of relatively cheap crude oil in the next decade signal an end to the era of fossil fuel utilisation for energy production and call urgently for revolutionary advances in alternative energy sources . Among other possibilities hydrogen is the ideal fuel and fuel cells are one of the most attractive energy conversion devices. The major research and development obstacles are the high cost in catalyst loading, corrosion and poisoning of electrodes and components and severe demands on electrolyte properties. Our proposal focuses on a neutron-scattering study joint to atomistic modelling of the proton dynamics in yttrium-doped barium cerate (BCY), a solid electrolyte. Further step is the interaction with a team of fuel-cell prototyping and testing. BCY is known for its high protonic and low electronic conductivity at ~800°C, a temperature acceptable for industrial power generation to onboard vehicle applications and suitable for fuel-cell operation without noble metal catalysts. Our experimental approach builds on the exceptional sensitivity of neutrons to hydrogen (via incoherent scattering) for proton-diffusion study and the high contrasts among the elements in BCY (via coherent scattering) for structural characterization of the system. We propose to use 1) the QENS spectrometer (IPNS-ANL) for its unique capability of concurrent data collection of diffraction and quasi-elastic to elastic scattering, 2) the pulsed-source chopper spectrometer HRMECS (IPNS-ANL) for access to the high energy transfer range to probe the phonon and local modes involving hydrogen and 3) MIBEMOL multi-chopper spectrometer (LLB) for its high energy-resolution and neutron flux for detailed quasi-elastic scattering. The proposed wor k aims at the training of the fellow in two world-standard neutron facilities and exposing him to the interaction between 3 groups of experts to address a research topic of primary importance." Champ scientifique natural scienceschemical sciencesinorganic chemistrytransition metalsnatural scienceschemical sciencesinorganic chemistryalkaline earth metalsnatural sciencesphysical sciencesatomic physicsnatural scienceschemical sciencescatalysisengineering and technologyenvironmental engineeringenergy and fuelsfuel cells Mots‑clés crystal phase transitions microscopic simulation neutron diffraction and scattering proton diffusion and conductivity yttrium doped barium cerate Programme(s) FP6-MOBILITY - Human resources and Mobility in the specific programme for research, technological development and demonstration "Structuring the European Research Area" under the Sixth Framework Programme 2002-2006 Thème(s) MOBILITY-2.2 - Marie Curie Outgoing International Fellowships (OIF) Appel à propositions FP6-2004-MOBILITY-6 Voir d’autres projets de cet appel Régime de financement OIF - Marie Curie actions-Outgoing International Fellowships Coordinateur COMMISSARIAT A L'ENERGIE ATOMIQUE Contribution de l’UE Aucune donnée Adresse 31-33 Rue de la Fédération PARIS France Voir sur la carte Liens Site web Opens in new window Coût total Aucune donnée Participants (1) Trier par ordre alphabétique Trier par contribution de l’UE Tout développer Tout réduire ARGONNE NATIONAL LABORATORY États-Unis Contribution de l’UE Aucune donnée Adresse 9700 S. Cass Ave ARGONNE Voir sur la carte Liens Site web Opens in new window Coût total Aucune donnée
