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2. Electrochemical Behavior of Tantalum Nitride Protective Layers for PEMFC Application.

Author

Achille, Aurélie, Mauvy, Fabrice, Fourcade, Sebastien, Michau, Dominique, Cavarroc, Marjorie, and Poulon-Quintin, Angéline

Subjects
*PROTON exchange membrane fuel cells, *METALS, *FUEL cell electrolytes, *REACTIVE sputtering, *INDUSTRIAL chemistry
Abstract

Proton Exchange Membrane Fuel Cells (PEMFCs) are promising technology to convert chemical energy from dihydrogen in electrical energy. HT-PEMFCs are working at high temperatures (above 120 °C) and with doped orthophosphoric acid H3PO4 PBI membranes. In such devices, bipolar metallic plates are used to provide reactive gas inside the fuel cell and collect the electrical current. The metallic elements used as bipolar plates, end plates, and interconnectors in acid electrolyte and gaseous fuel cells are severely damaged by a combination of oxidation (due in particular to the use of oxygen, whether pure or contained in the air) and corrosion (due in particular to acid effluents from the electrolyte). This degradation rapidly leads to the loss of the electrical conductivity of the metallic elements and today requires the use of very specific alloys, possibly coated with pure gold. The solution investigated in the present study is the use of a protective coating based on single-phase nitrides obtained by reactive magnetron sputtering or reactive HiPIMS (High-Power Impulse Magnetron Sputtering). The influence of the microstructure on the physical–chemical properties was studied. The electrochemical properties were quantified following two approaches. First, the corrosion current of the developed coatings was measured at room temperature and at higher temperatures using the Linear Sweep Voltammetry (LSV) technique. Then, Electrochemical Impedance Spectroscopy (EIS) measurements were performed to better identify and evaluate their corrosion-resistance performances. [ABSTRACT FROM AUTHOR]

Published
2024
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12. Lanthanum nickelate as an efficient oxygen electrode for solid oxide electrolysis cell

Author

Mauvy, Fabrice, Grenier, Jean-Claude, Vulliet, Julien, Rougier, Aline, Bassat, Jean-Marc., Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB), Université de Bordeaux (UB)-Institut Polytechnique de Bordeaux-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), and ANR-13-PRGE-0008,DJANGO,optimisation Des Jonctions ANode/électrolyte et cathode/électrolyte des Générateurs d'hydrOgène par électrolyse de la vapeur d'eau(2013)

Subjects
Solid Oxide Electrolysis Cell, Renewable Energy, Sustainability and the Environment, oxygen electrode, aging, Energy Engineering and Power Technology, [CHIM.MATE]Chemical Sciences/Material chemistry, lanthanum nickelate, energy efficiency
Abstract

International audience; The present study focuses on an alternative structured oxygen electrode for solid oxide electrolysis cell (SOEC). La2NiO4+δ nickelate, LNO, was selected with respect to its mixed electronic and ionic conductivity and its good chemical stability. Complete single cells were built using screen printing of LNO and LaNi0.6Fe0.4O3 (LNF) layers on a standard hydrogen electrode supported half cell consisting of a porous NiO-YSZ layer, a dense 8YSZ electrolyte layer and a thin interlayer of GDC. The LNO cells polarization curves under various anodic flows of H2O/H2 (90/10) show excellent performances compared to the commercial LSCF (La0.6Sr0.4Co0.2Fe0.8O3-x) based cells. The steam conversion ratio SC increases from around 40% to 80% when the gas flow decreases from 36 to 12 NmL min-1 cm-2. With a degradation rate of 1.5% 1,000 hrs-1 after 500 hrs operating time (i =-0.5 A cm-2) at 800 °C, using a medium H2O/H2 (90/10) gas flow of 24 NmL min-1 cm-2 , LNO oxygen electrode shows higher durability than the state of the art LSCF oxygen electrode. Energy efficiency analysis confirms the dependency of the total efficiency with the current density and gas flow allowing us to suggest optimized conditions for reaching targets of commercial H2 production.

Published
2022

23. Ammonia fueled Proton conducting devices: toward more and more sustainable energy conversion and storage

Author

T., Canal, Mauvy, Fabrice, glisenti, antonella, University of Padova [Padoue, Italie], Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB), Université de Bordeaux (UB)-Institut Polytechnique de Bordeaux-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), and Leuphana University of Luneberg and ISC3

Subjects
[CHIM.MATE]Chemical Sciences/Material chemistry
Abstract

International audience; This contribution describes the development of proton-conductive solid oxide fuel cells, in which ammonia is the fuel. Not presenting carbon, ammonia offers the possibility of sustainable development in "carbon free" perspective. Ammonia is an interesting energy carrier being characterized by good hydrogen content; it is highly studied and produced with a well-established process. Proton conductor based solid oxide cells can operate at much lower temperatures (500-600°C) compared to the traditional solid oxide cells (800-1000°C). The necessity of developing proton based devices working with fuel ammonia can answer to the desire of low cost and high safety. Electrochemically active anodes active with this fuel, pushed the research in the design and optimization of this component. A Nickel-Yttrium-doped Barium cerate (Ni-BCY) cermet is developed and oxidized in this contribution; the addition of Nickel, by impregnation, catalyzes the decomposition reaction of ammonia and increases the electric conductivity. The chosen electrolyte is Y-doped Barium cerate (BCY); the use of ammonia as fuel allows to avoid the weakness of this materials: the reactivity with acidic gases as CO2. La-Sr-Co ferrite (LSCF) has been chosen for cathode. LSCF is a mixed ionic/electronic conductor which has been proposed as a valid cathode material thanks to its high oxygen diffusivity. Electrode and electrolyte have been characterized by XPS, XRD, SEM/EDX, BET, TPR, TPO; the symmetrical cells with BCY as electrolyte and Ni-BCY as electrodes were tested, at first, in a single chamber design, to analyze the electrochemical performances under different conditions, between 550 and 750°C. The measurements were carried out both in single and double chamber design. The results are encouraging: comparable results have been obtained in hydrogen and ammonia, confirming the success in the cell fueled with ammonia and the possibility to use this safety fuel as energy storage and hydrogen vector.

Published
2021

32. New magnesium rich alloys: structure, magnetic and H sorption properties: some words about the 'light mobility

Author

AL ASMAR, Eliane, AL BACHA, Serge, GAUDIN, Etienne, ISABELLE, Aubert, SABATIER, Jocelyn, MAUVY, Fabrice, BOBET, Jean-Louis, Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB), Université de Bordeaux (UB)-Institut Polytechnique de Bordeaux-Centre National de la Recherche Scientifique (CNRS), Institut de Mécanique et d'Ingénierie de Bordeaux (I2M), Université de Bordeaux (UB)-École Nationale Supérieure d'Arts et Métiers (ENSAM), Arts et Métiers Sciences et Technologies, HESAM Université (HESAM)-HESAM Université (HESAM)-Arts et Métiers Sciences et Technologies, HESAM Université (HESAM)-HESAM Université (HESAM)-Institut Polytechnique de Bordeaux-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Laboratoire de l'intégration, du matériau au système (IMS), Université Sciences et Technologies - Bordeaux 1-Institut Polytechnique de Bordeaux-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Université de Bordeaux (UB), Université de Bordeaux (UB)-Institut Polytechnique de Bordeaux-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Institut de Mécanique et d'Ingénierie (I2M), Université de Bordeaux (UB)-Institut Polytechnique de Bordeaux-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Arts et Métiers Sciences et Technologies, HESAM Université (HESAM)-HESAM Université (HESAM), and Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut Polytechnique de Bordeaux-Université de Bordeaux (UB)

Subjects
ComputingMilieux_MISCELLANEOUS, [SPI.MAT]Engineering Sciences [physics]/Materials
Abstract

International audience

Published
2019

33. Electroceramics sintered by Spark Plasma Sintering

Author

Elissalde, Catherine, Chung Seu, U-Chan, Philippot, Gilles, Herisson de Beauvoir, Thomas, Ndayishimiye, Arnaud, Rua Taborda, Maria Isabel, Mauvy, Fabrice, Fourcade, Sébastien, Aymonier, Cyril, Mornet, Stéphane, Majimel, Jérôme, Suchomel, Matthew, Debéda, Hélène, Goglio, Graziella, Josse, Michaël, Estournès, Claude, Maglione, Mario, Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB), Université de Bordeaux (UB)-Institut Polytechnique de Bordeaux-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de l'intégration, du matériau au système (IMS), Université Sciences et Technologies - Bordeaux 1-Institut Polytechnique de Bordeaux-Centre National de la Recherche Scientifique (CNRS), Centre interuniversitaire de recherche et d'ingenierie des matériaux (CIRIMAT), Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National Polytechnique (Toulouse) (Toulouse INP), and Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie du CNRS (INC)

Subjects
TheoryofComputation_MISCELLANEOUS, [SPI]Engineering Sciences [physics], [CHIM]Chemical Sciences, [CHIM.MATE]Chemical Sciences/Material chemistry, [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, GeneralLiterature_MISCELLANEOUS, ComputingMilieux_MISCELLANEOUS
Abstract

Invited talk; International audience

Published
2019

34. Exploring Spark Plasma Sintering at low temperature to (co)-sinter functional oxides used in electroceramics

Author

ELISSALDE, Catherine, CHUNG SEU, U-Chan, RUA TABORDA, Maria Isabel, PHILIPPOT, Gilles, HERISSON DE BEAUVOIR, Thomas, NDAYISHIMIYE, Arnaud, MAUVY, Fabrice, FOURCADE, Sébastien, MICHAU, Dominique, AYMONIER, Cyril, ESTOURNES, Claude, GOGLIO, Graziella, JOSSE, Michaël, DEBÉDA, Hélène, MAGLIONE, Mario, Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB), Université de Bordeaux (UB)-Institut Polytechnique de Bordeaux-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de l'intégration, du matériau au système (IMS), Université Sciences et Technologies - Bordeaux 1-Institut Polytechnique de Bordeaux-Centre National de la Recherche Scientifique (CNRS), Centre interuniversitaire de recherche et d'ingenierie des matériaux (CIRIMAT), Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National Polytechnique (Toulouse) (Toulouse INP), and Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie du CNRS (INC)

Subjects
[SPI]Engineering Sciences [physics], [CHIM.MATE]Chemical Sciences/Material chemistry, [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2019

37. A device for hydrogen production on demand with application to bike electrical assistance: description, production characterization and basic control

Author

Sabatier, Jocelyn, Mauvy, Fabrice, Bobet, Jean-Louis, Mohedano, Damien, Faessel, Matthieu, Bos, Frédéric, Laboratoire de l'intégration, du matériau au système (IMS), Université Sciences et Technologies - Bordeaux 1-Institut Polytechnique de Bordeaux-Centre National de la Recherche Scientifique (CNRS), Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB), and Université de Bordeaux (UB)-Institut Polytechnique de Bordeaux-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)

Subjects
ComputingMilieux_MISCELLANEOUS, [SPI.AUTO]Engineering Sciences [physics]/Automatic
Abstract

International audience

Published
2018

38. Using the Distribution of Relaxation Times for analyzing the Kramers-Kronig Relations in Electrochemical Impedance Spectroscopy

Author

Zeimetz, Bernhard, Flura, Aurelien, Grenier, Jean-Claude, Mauvy, Fabrice, Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB), Université de Bordeaux (UB)-Institut Polytechnique de Bordeaux-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), and ZEIMETZ, Bernhard

Subjects
Kramers-Kronig Relations, Distribution of Relaxation Times, Electrochemical Impedance Spectroscopy, [CHIM.GENI]Chemical Sciences/Chemical engineering, ACM: I.: Computing Methodologies/I.6: SIMULATION AND MODELING, [CHIM.GENI] Chemical Sciences/Chemical engineering, Data Integrity, [INFO.INFO-MO] Computer Science [cs]/Modeling and Simulation, [SPI.MAT] Engineering Sciences [physics]/Materials, [INFO.INFO-MO]Computer Science [cs]/Modeling and Simulation, [SPI.MAT]Engineering Sciences [physics]/Materials
Abstract

We propose to verify the Kramers-Kronig Relations (KKR) through comparison of two versions of the Distribution of Relaxation Times (DRT), calculated from the real and imaginary part of the impedance. When checking the integrity of impedance spectroscopy data, this method is useful to interpret correctly results when a direct calculation of the KKR integrals shows a deviation from measured data. Our method can distinguish cases (i) where a deviation from the KKR indicates genuine physical problems during the measurement from (ii) a deviation arising when the frequency range accessible by the measurement is insufficiently large.

Published
2018

41. Mixed Ionic and electronic conductors : The best answer for SOFC cathode materials ?

Author

MAUVY, Fabrice, Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut Polytechnique de Bordeaux-Université de Bordeaux (UB), and Toulin, Stéphane

Subjects
TheoryofComputation_MISCELLANEOUS, [CHIM.MATE] Chemical Sciences/Material chemistry, [CHIM.MATE]Chemical Sciences/Material chemistry, GeneralLiterature_MISCELLANEOUS, ComputingMilieux_MISCELLANEOUS
Abstract

Invited talk; International audience

Published
2017

42. Development of an Isotopic Oxygen Exchange Setup Operating Under High Pressure: Preliminary Measurements Performed on Ln2NiO4+d(Ln=La, Pr, Nd, MIEC) Oxides

Author

Flura, Aurélien, Laurencin, Jérôme, Fourcade, Sébastien, Mauvy, Fabrice, Vibhu, Vaibhav, Salvetat, Jean-Paul, Mouginn, Julie, and Bassat, Jean-Marc

Abstract

MIEC (Mixed Ionic Electronic Conductors) used as oxygen electrodes in Solid Oxide Cells are characterized by both high oxygen diffusion (D) and surface exchange (k) coefficients. To date, the reported measurements have been performed at ambient pressure and even below. However, to reach a higher efficiency at the system level, it would be helpful to operate the Solid Oxide Electrolysers under high pressure. A preliminary study is therefore mandatory, to assess the oxygen reduction/oxidation and the transport properties of the electrodes materials when submitted to high pressure. Then, an innovative setup able to operate up to a total pressure of 50 bar has been developed. Its technical characteristics will be described here. This setup has been used to characterize the properties of nickelates with MIEC properties. Oxygen exchanges have been performed in the range 500 < T°C < 700, under p(O2) ~ 6.5 bars. Preliminary results (oxygen over-stoichiometry, D* and k* coefficients) obtained on Ln2NiO4+d(Ln=La, Pr, Nd) oxides are presented and discussed.

Published
2021
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44. Progress in SOFC cathode materials based on solid state chemistry improvements

Author

MAUVY, Fabrice, Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut Polytechnique de Bordeaux-Université de Bordeaux (UB), and Toulin, Stéphane

Subjects
TheoryofComputation_MISCELLANEOUS, [CHIM.MATE] Chemical Sciences/Material chemistry, [CHIM.MATE]Chemical Sciences/Material chemistry, GeneralLiterature_MISCELLANEOUS, ComputingMilieux_MISCELLANEOUS
Abstract

Invited talk; International audience

Published
2016

45. Proton hydration and transport properties in proton-conducting ceramics: Fundamentals and highlights

Author

BERGER, Pascal, MAUVY, Fabrice, GRENIER, Jean-Claude, SATA, Noriko, MAGRASÓ, A., HAUGSRUD, Reidar, SLATER, Peter, Laboratoire d'Etudes des Eléments Légers (LEEL - UMR 3685), Nanosciences et Innovation pour les Matériaux, la Biomédecine et l'Energie (ex SIS2M) (NIMBE UMR 3685), Institut Rayonnement Matière de Saclay (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Institut Rayonnement Matière de Saclay (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC), Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut Polytechnique de Bordeaux-Université de Bordeaux (UB), Department of Electrochemical Energy Technology, German Aerospace Center (DLR), University of Oslo (UiO), School of Chemistry [Birmingham], University of Birmingham [Birmingham], Marrony, M., Palacin, Serge, Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut Rayonnement Matière de Saclay (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), and Université de Bordeaux (UB)-Institut Polytechnique de Bordeaux-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[CHIM.MATE] Chemical Sciences/Material chemistry, [CHIM.MATE]Chemical Sciences/Material chemistry, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2016

48. Development of new materials and optimisation of elaboration techniques for Solid Oxide Fuel cells applications

Author

Mauvy, Fabrice, Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut Polytechnique de Bordeaux-Université de Bordeaux (UB), and Toulin, Stéphane

Subjects
TheoryofComputation_MISCELLANEOUS, [CHIM.MATE] Chemical Sciences/Material chemistry, [CHIM.MATE]Chemical Sciences/Material chemistry, GeneralLiterature_MISCELLANEOUS, ComputingMilieux_MISCELLANEOUS
Abstract

Invited talk; International audience

Published
2015

50. Carbon-based lanthanum nickelate material La2−x−yNdxPryNiO4+δ (x = 0, 0.3, and 0.5; y = 0 and 0.2) as a bifunctional electrocatalyst for oxygen reduction in alkaline media

Author

Amira, Sabah, Ferkhi, Mosbah, Khaled, Ammar, Mauvy, Fabrice, Grenier, Jean-Claude, Houssiau, Laurent, and Pireaux, Jean-Jacques

Abstract

The kinetics and mechanism of oxygen reduction reaction (ORR) in alkaline medium are studied on lanthanum nickelate materials La2−x−yNdxPryNiO4±δ (x = 0, 0.3 and 0.5; y = 0 and 0.2) using the electrochemical technique of the rotating disk electrode in a 0.5-M solution of NaOH. The oxide powders are synthesized by the citrate–nitrate method. Structural and surface characterizations are performed by X-ray diffraction (XRD) and X-ray photoelectron spectrometry (XPS), while the morphology is studied by scanning electron microscopy (SEM). Electrochemical studies are carried out by linear voltamperometry, cyclic voltamperometry, and impedance spectroscopy. The doped and undoped electrocatalyst composites (La2−x−yNdxPryNiO4±δ/C), made of the rare earth nickel oxides mixed with carbon black (Vulcan XC-72(C)), are deposited as a thin layer on a glassy carbon substrate. At room temperature, the undoped electrocatalyst La2NiO4±δ material shows single-step kinetics unlike the doped materials. The doping by the rare earths Nd or/and Pr significantly enhances the electrical conductivity of the electrode under air and the diffusion of oxygen. On the other hand, the steric hindrance between the atomic oxygen orbital (π-orbital (O2)–π-orbital (O2)) and the dz2–orbital (Ni)–π-orbital (O2) influences the training model of the liaison (dz2(Ni)–π (O2)). The structure, oxygen adsorption, and oxidation states of the catalyst elements have a large influence on the mechanism and kinetics of the ORR. The LNNO3/C and LNPNO5/C electrocatalysts have better electrocatalytic performances, which allow them to be used as a bifunctional electrocatalyst for the reduction of oxygen in alkaline media. [ABSTRACT FROM AUTHOR]

Published
2019
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