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Academic literature on the topic 'Électrolytes céramiques'
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Journal articles on the topic "Électrolytes céramiques"
Abdessamed, Soumia, Hocine Ben Moussa, Bariza Zitouni, Benoit Rousseau, and Mostefa Zeroual. "Influence du rayonnement thermique sur le champ de température d’un coeur de pile à combustible SOFC à anode supportée Effet des températures de gaz." Journal of Renewable Energies 13, no. 3 (October 25, 2023). http://dx.doi.org/10.54966/jreen.v13i3.219.
Full textDissertations / Theses on the topic "Électrolytes céramiques"
Pirovano, Caroline. "Membranes céramiques BIMEVOX pour la séparation électrochimique de l'oxygène." Lille 1, 2000. https://pepite-depot.univ-lille.fr/LIBRE/Th_Num/2000/50376-2000-248-249.pdf.
Full textSimone, Antonia. "Caractérisation microstructurale et électrique de couches céramiques obtenues par le dépôt électrophorétique (EPD) : Application à la zircone cubique." Phd thesis, Ecole Nationale Supérieure des Mines de Saint-Etienne, 2004. http://tel.archives-ouvertes.fr/tel-00813386.
Full textVar, Kethsovann. "Mesures des propriétés mécaniques d'un électrolyte tout solide et de la dégradation électro-mechano-chimique dans une batterie tout solide." Electronic Thesis or Diss., Sorbonne université, 2024. http://www.theses.fr/2024SORUS611.
Full textMobility is a key issue, and the electric vehicle (EV) is advancing in response to environmental challenges. Currently relying on Li-Ion batteries, the EV faces certain limitations, such as the use of flammable solvents and low energy density, which reduces its range. A technological breakthrough is therefore necessary, and the all-solid-state battery is emerging as a promising solution. By replacing the liquid electrolyte with a solid electrolyte, it becomes possible to use metallic lithium, thereby increasing the energy density from 372 to 3862 mAh.g⁻¹. However, challenges remain, notably the volumetric changes in the electrodes, which cause mechanical degradation at the interfaces. Our study explores the relationships between the electrochemical and mechanical properties of all-solid-state batteries. We selected Li6PS5Cl argyrodite for its advantages, including its cold-pressing capability and high ionic conductivity (10⁻³ S.cm⁻¹). DFT simulations show that its Young's modulus is relatively low (22 GPa), making it more flexible than other solid materials. Our strategy to adjust its mechanical properties is based on three approaches: 1) modifying the particle size to influence defects, 2) adjusting the stoichiometry with Li6PS5X variants (X = Cl, Br, I, F) to modify chemical bonds, and 3) incorporating polymers to form a composite, thereby fine-tuning the overall mechanical properties. We investigated the impact of two synthesis routes, solution-based and dry, but neither method allowed effective control of particle size. Thanks to an innovative cryo-milling process, the particle size was reduced post-synthesis to as small as 2 µm. To address issues of air and moisture reactivity, we developed a setup to measure the Young's modulus of argyrodite. The method involves creating an argyrodite pellet in a steel mold under an inert atmosphere, applying mineral oil to ensure sealing, thus enabling nano-indentation analysis in ambient conditions. This method allows us to measure several material properties, such as Young's modulus (E), hardness (H), and viscoelasticity. The average E values, based on 400 indents, are around 20 GPa. The results reveal a limited elastic domain and a viscous behavior. Regarding Li6PS5X (X = Cl, Br, I, F), our experiments did not show significant changes in mechanical properties. However, the addition of PVDF polymer, at mass ratios of 20% and 50%, reduces the Young's modulus. We also studied the impact of solid electrolyte particle size (2 µm vs. 20 µm) on cycling performance in a full battery, as well as the effect of adding PVDF in the composite positive electrode. Several cells showed good cyclability over more than 200 cycles, with capacity retention above 85%. It appears that cell-forming processes influence performance more than particle size. At a 20% PVDF ratio, the cells exhibit similar performance to those without polymer addition. However, at higher ratios, PVDF hinders ionic conductivity, thus increasing cell polarization. The beneficial or detrimental effect of PVDF depending on the mass ratio is discussed in detail in the manuscript
Jarry, Angélique. "Optimisation et caractérisation des propriétés de transport de nouveaux électrolytes céramiques pour pile à combustible conductrice protonique et anionique dérivés de Baln0. 8Ti0. 2O2. 6-n(OH)2n(BIT02)." Nantes, 2012. http://archive.bu.univ-nantes.fr/pollux/show.action?id=df220054-12e8-467d-a71a-2976bae4ccba.
Full textA major limitation of the perovskite type H+-SOFC electrolyte performance is the actual competition between a high level of ionic conductivity and a good stability in CO2 containing atmosphere. A compromise must be found between a low basicity to avoid decomposition by reaction with CO2 and a good proton and/or O2- diffusion associated with a high crystallographic symmetry. With an optimization of those key features, we expect to obtain the best conductivity/stability couple. Such strategies were carried out on BaIn0. 8Ti0. 2O2. 6-n(OH)2n by Zr,Ln,Sc→In,Ti substitutions, leading to BaIn0. 6Ln0. 2Ti0. 2O2. 6-n(OH)2n with Ln = Yb, Lu or Dy and BaIn1-x-yTixZryO2. 6-n with x+y ≤ 0. 2 for the best candidates. They demonstrate promising protonic and anionic conductivities respectively σH+400°C ~1. 5 mS. Cm-1 and σO2-700°C ~10 mS. Cm-1 and good chemical stability under 3% CO2 atmosphere. Even though the strong correlations between perovskite crystal phase and transport properties are well known, a better fundamental understanding at an atomic scale of conduction mechanisms is necessary to enhance the likelihood of tailoring electrolyte performance. In this work, we attempt to quantify and to localize the oxygen and proton species and to study their motions upon hydration in BaIn0. 6Yb0. 2Ti0. 2O2. 6-n(OH)2n by combining thermal X-ray, electron and neutron diffractions, neutron time-of-flight scattering data, MAS NMR, TGA and IR spectroscopy. A particular attention was paid on the structural determination as well as on hydration mechanism understanding
Delbos, Cédric. "Contribution à la compréhension de l'injection par voie liquide de céramiques (Y. S. Z. ; Pérovskite,. . . ) ou métaux (Ni,. . . ) dans un plasma d'arc soufflé afin d'élaborer des dépôts finement structurés pour S. O. F. Cs." Limoges, 2004. http://aurore.unilim.fr/theses/nxfile/default/e9f63d07-0a8c-400d-8f58-adc4585d61e6/blobholder:0/2004LIMO0035.pdf.
Full textThe aim of this PhD work is the elaboration, by a same process, of the different constituents (electrolyte / anode / cathode) of Solid Oxyde Fuell Cells (S. O. F. Cs ). The yttria stabilised zirconia electrolyte (Y. S. Z. ) should present a dense microstructure (gas impervious) with a thickness included betwen 5 and 20 µm, whereas the electrodes shoud be porous and thicker (200-500 µm), in Ni-Y. S. Z. (anode) and LaMnO 3 (cathode). The chosen process to reach these goals is the direct current plasma jet projection, under atmospheric pressure, of ceramics or metals by liquid injection (liquid precursor or micronic or submicronic powder suspensions). To bring this work to a successful conclusion, a good understanding of the acting event (plasma parameters, liquid injection, plasma liquid jet penetration and plasma suspension treatment, kind and granulometry of the powder used for the suspension production,…) is necessary, and simple models have been used in order to determine some magnitudes and explain experimental results. These works have also allowed the elaboration of dense electrolytes with a thickness included between 5 and 20 µm and finely structured porous electrodes. Moreover, the first results on multi layered production of the fuel cell constituent (electrolyte-cathode and electrolyte-anode) are likely
Li, Rong. "Preparation and ion conductivity of nano to micron grains size Bi2O3-Ln2O3 (Ln=Dy, Y, Er) ceramics." Thesis, Lille 1, 2009. http://www.theses.fr/2009LIL10141/document.
Full textThe aim of this work was the study of the effect of the grain size of bismuth based oxide ceramics on the ionic properties. With the aim to prepare dense ceramics with controlled grain size at the nano-scale, nano-powders of (Bi2O3)0.75(Dy2O3)0.25, (Bi2O3)0.75(Er2O3)0.25, (Bi2O3)0.75(Y2O3)0.25 and (Bi2O3)0.75(Er2O3)0.125(Y2O3)0.125 compositions were successfully prepared by a reverse chemical titration method. As shown by XRD and TEM, after annealing for 3 hours at 500°C, powders with single crystal grains with size of about 20nm were obtained. At that stage, a b-form was evidenced for all compositions.Then, conditions of sintering were optimized. Two techniques were used: pressureless sintering in a conventional furnace and Spark Plasma Sintering (SPS). In both methods, it led to ceramics with relative density higher than 94%. The grain size was only 20nm by SPS. It ranges from 60nm to 500nm by conventional sintering, for which it was shown that the grain growth was controlled by mass transport through the grain boundaries. The effect of grain size on total ionic conductivity was studied by impedance spectroscopy for all compositions. For most compositions, a decrease of total ionic conductivity with grain size was observed due to a predominant blocking effect of grain boundary when grain size decreases. However (Bi2O3)0.75(Y2O3)0.25 with grain size of 22nm showed a better conductivity than ceramics with grain size of 62nm and a better separation of bulk and grain boundary response. At such a low size, the space charge layers effect between grains can not be neglected anymore and the observed increase in conductivity is likely the results of an increase of the conductivity in this space charge layers
Khani, Emani Zohreh. "Elaboration et caractérisation physico-chimiques des matériaux céramiques conducteurs protoniques pour une application comme électrolyte en pile à combustible aux températures de fonctionnement 400-700°C." Montpellier 2, 2009. http://www.theses.fr/2009MON20001.
Full textWe have developed different synthesis methods to prepare the nanoparticulated proton conducting perovskites for the application as electrolyte in a proton ceramic fuel cell (PCFC). Barium cerate and barium zirconate doped with yttrium, core-shell structure materials (core: BZY10, shell: BCY10), barium calcium niobium oxide and barium calcium niobium oxide doped with zirconium were prepared by hydrogelation of acrylates, auto-combustion and reveres micelles routes. These nanopowders were densified as compressed disks. Water uptake, proton conductivity and chemical stability of these ceramics against carbonate formation were determined between 400-700 °C
Horwat, David. "Synthèse par pulvérisation cathodique magnétron et caractérisation de films minces dédiés au développement d'un dispositif électrochrome "tout céramique" à électrolyte NASICON." Vandoeuvre-les-Nancy, INPL, 2006. http://docnum.univ-lorraine.fr/public/INPL/2006_HORWAT_D.pdf.
Full textThe development of a “fully ceramic” electrochromic device based on a thin films stack represents a technological jump that could allow a mass production of electrochromic systems. The main difficulty consists in synthesising a well suited electrolyte and in the compatibility of the various elements. After a description of the experimental device and the presentation of the methods used to characterise the deposited layers, we present the limitations of the classical magnetron sputtering technique to synthesise thin NASICONs (Na3Zr2Si2PO12) films and propose a new method based on the reactive co-sputtering of Zr-Si and Na3PO4 targets. The films, amorphous in their as deposited state, present a good chemical homogeneity on large areas and cristallise under a NASICONs structure after annealing at temperatures lower than 750°C. The ionic conductivity evolves with the structural organisation and shows values close to the characteristic ones of bulk NASICONs. A study of the relations between the elaboration parameters and the optical and electrical properties of ZnO: Al transparent electrodes shows the possibility to synthesise this material under thin highly conducting and transparent films form on large scale in a short interval of experimental conditions. Finally, electrochromic tests on ITO-WO3 and ITO-WO3-NASICON evidenced the validity of the concept of an electrochromic device based on a Na+ conducting ceramic electrolyte
Etchegoyen, Grégory. "Développement d'une membrane céramique conductrice mixte pour la production de gaz de synthèse." Limoges, 2005. http://aurore.unilim.fr/theses/nxfile/default/d4efe5f3-0cbb-4d2b-a68b-376d3b959e27/blobholder:0/2005LIMO0026.pdf.
Full text. Natural gas conversion into syngas (H2+CO) is very attractive for hydrogen and clean fuel production via GTL technology by providing an alternative to oil products and reducing greenhouse gas emission. Syngas production, using a mixed ionic-electronic conducting ceramic membrane, is thought to be particularly promising. The purpose of this PhD thesis was to develop this type of membrane. Mixed-conducting oxide was synthesized, characterized and then, shaped via tape casting and co-sintered in order to obtain multilayer membranes with controlled architectures and microstructures. Oxygen permeation fluxes were measured with a specific device to evaluate membrane performances. As a result, the optimisation of architecture and microstructure made it possible to increase oxygen permeation flux by a factor 30. Additional researches were focused on the oxide composition in order to achieve higher dimensional stability
Calabretta, Daniel Louis. "Theoretical and experimental investigations related to electrolytic reverse complete oxidation within the Na-B-H-O system." Thèse, Université de Sherbrooke, 2012. http://hdl.handle.net/11143/6119.
Full textBooks on the topic "Électrolytes céramiques"
Polymer and Ceramic Electrolytes for Energy Storage Devices, Two-Volume Set. Taylor & Francis Group, 2021.
Find full textRaghavan, Prasanth, and Jabeen Fatima. Polymer and Ceramic Electrolytes for Energy Storage Devices, Two-Volume Set. Taylor & Francis Group, 2021.
Find full textRaghavan, Prasanth, and Jabeen Fatima. Polymer and Ceramic Electrolytes for Energy Storage Devices, Two-Volume Set. Taylor & Francis Group, 2021.
Find full textRaghavan, Prasanth, and Jabeen Fatima M. J. Polymer and Ceramic Electrolytes for Energy Storage Devices Two-Volume Set. Taylor & Francis Group, 2021.
Find full textCeramic and Specialty Electrolytes for Energy Storage Devices. Taylor & Francis Group, 2021.
Find full textRaghavan, Prasanth, and Jabeen Fatima. Ceramic and Specialty Electrolytes for Energy Storage Devices. Taylor & Francis Group, 2021.
Find full textRaghavan, Prasanth, and Jabeen Fatima. Ceramic and Specialty Electrolytes for Energy Storage Devices. Taylor & Francis Group, 2021.
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