A5065347717- Advancements in Solid Oxide Fuel Cells
- Advancements in Battery Materials
- Fuel Cells and Related Materials
- Electronic and Structural Properties of Oxides
- Advanced Battery Technologies Research
- Electrocatalysts for Energy Conversion
- Magnetic and transport properties of perovskites and related materials
- Advanced Battery Materials and Technologies
- Semiconductor materials and devices
- Catalytic Processes in Materials Science
- Solid-state spectroscopy and crystallography
- Supercapacitor Materials and Fabrication
- Metallurgical Processes and Thermodynamics
- Nuclear Materials and Properties
- Extraction and Separation Processes
- Chemical Looping and Thermochemical Processes
- Advanced Materials Characterization Techniques
- Thermal Expansion and Ionic Conductivity
- Non-Destructive Testing Techniques
- Conducting polymers and applications
- X-ray Diffraction in Crystallography
- Nuclear materials and radiation effects
- Chemical and Physical Properties in Aqueous Solutions
- Metal Extraction and Bioleaching
- Semiconductor materials and interfaces
Institut Laue-Langevin
2023-2024
Université Grenoble Alpes
2024
CEA Grenoble
2022-2024
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2022-2024
Centre National de la Recherche Scientifique
2024
University of Tartu
2013-2023
Correlative neutron and X-ray imaging unravels the causes of localized defects in Li-ion batteries containing a silicon-graphite based anode.
A novel dual chamber (DC) measurement cell has been implemented for simultaneous monitoring of crystallographic and electrochemical (EC) properties Ni-Ce0.9Gd0.1O2−δ (Ni-GDC) solid oxide fuel (SOFC) anode at different polarizations. The influence system parameters (temperature, oxygen partial pressure in compartment ion flux through the electrolyte membrane from cathode to anode) on structure GDC redox performance Ni studied. leads increase layers close electrolyte. Increase decrease unit...
To combine chemical stability of BaY0.1Zr0.9O3-δ (BZY) and good proton conductive properties BaY0.1Ce0.9O3-δ (BCY) bilayer membranes were prepared. Supportive BCY prepared applying dry pressing nanopowder, which was synthesized with ultrasonic spray pyrolysis method. Thin protective BZY coatings using magnetron sputtering methods. Ultarsonic pyrolyzed layers 0.5–1.1 μm thick, phase pure some closed porosity. Protective reactive method approximately 0.7 highly dense purity. Activation energy...
An operando measurement cell has been used in this work for simultaneous monitoring of electrochemical (EC) properties using impedance spectroscopy and crystallographic structure high temperature (HT) X-ray diffraction analysis (XRD) La0.75Sr0.25Cr0.5Mn0.3Ni0.2O3−δ (LSCMN) anode at working conditions, i.e. redox conditions. Gradual reversible increase Sc0.2Ce0.01Zr0.79O2−δ (ScCeSZ) lattice parameter reducing atmosphere oxide ion flux through the membrane demonstrated. Reversible changes...
Exploring the potential of sodium‐based materials is utmost importance, especially for next‐generation solid‐state batteries. Herein, Na 3 PS 4 thiophosphate solid electrolyte focused on. While its tetragonal α phase initially studied batteries, impact heat treatment and transitions amorphous semicrystalline polymorphs obtained by mechanochemical synthesis remains poorly understood. The structural evolution evaluated as function temperature processes. Both samples are heat‐treated during an...
Abstract The electrochemical and crystalline structure of mixed ionic‐electronic conductive La 0.75 Sr 0.25 Cr 0.5 Mn 0.3 Ni 0.2 O 3–δ (LSCMN) electrode in porous scandia ceria stabilized zirconia (ScCeSZ) electrolyte matrix during the first 140 h has been studied an operando XRD experiment. Intense degradation performance a fuel cell as well electrolysis modes observed. However, mechanism was seen to be different for two operation modes. formation new ceramic phase observed on surface using...
Chemically stable BaY 0.1 Zr 0.9 O 3-δ (BZY) layers were deposited onto the Ce (BCY) substrate using reactive magnetron sputtering and spray pyrolysis method. Dense supportive BCY substrates with good phase purity made from nanopowder synthesized nitrate salt solutions 2.4 MHz ultrasonic particle generator. Protective BZY layer method was approximately 0.7 mm thick, highly dense, no cracks. Spray pyrolyzed 2-3 some closed porosity. Electrochemical properties of membrane without protective...
This paper describes the developments of project about synthesis proton conductive BaCe 0.9 Y 0.1 O 3-δ (BCYO) membrane with thin chemically more stable protective BaZr 0,9 0,1 3- δ (BZYO) layer. Dense pellets BCYO good phase purity were synthesized from nanopowders and electrochemical as well microstructural parameters characterized. The influence microstructure on conductivity activation energy was studied best material has been selected. Deposition BZYO layer performed using 120 kHz...
A novel La 0. 2 Sr 0.7-x Ca x Ti 0.95 Fe 0.05 O 3-δ (LSCFT-x) fuel electrode compositions for high-temperature solid oxide cell application are synthesized using glycine-nitrate synthesis method. To understand the influence of Sr/Ca ratio on electrical conductivities different LSCFT, DC four-probe conductivity measurements porous layers has been performed. Conductivities have measured at three atmospheres: air, 1% H + 3% 96% Ar, and 97% O. The crystal structure microstructure studied X-ray...
A new in operando measurement cell has been developed for simultaneous monitoring of electrochemical (EC) properties and crystallographic structure using high temperature (HT) X-ray diffraction analysis (XRD) solid oxide fuel (SOFC) anodes at working conditions. The influence ion flux on Gd0.1Ce0.9O2-d (GDC) Ni-GDC cermet anode as well impact Ni ⇌ NiO redox cycles the performance studied. Influence temperature, pO2 gas stream through membrane GDC lattice parameters was observed. Decrease...
Detailed chemical information from electrode surfaces at operating conditions is essential for rational development of solid oxide cell (SOC) electrodes but so far, because harsh very little known about mechanistic aspects surface reactions as well thermodynamics SOC under electrochemical reaction (1,2). Spectroelectrochemistry, i.e. spectroscopic (X-ray absorption, X-ray photoelectron spectroscopy (XPS) and Raman spectroscopy) characterization electrochemically controlled promising...
Abstract Characteristics of the porous Gd 0.15 Sr 0.85 CoO 3−δ and La 0.6 0.4 cathodes were compared using data measured at different electrode potentials oxygen partial pressures. The electrochemical high‐temperature in situ XRD (HT‐XRD) method combined with impedance spectroscopy has been used. response crystallographic parameters values on changes potential discussed. Reversible lattice for both cathodes, slower , observed depending temperature ( T ), E pressure p O 2 ). are determined by...
Acceptor-doped perovskite-type oxides including BaY 0.1 Ce 0.9 O 3- d (BYCO) are known for excellent proton conductivity under fuel cell operating conditions and applicable in electrolysers, reactors sensors. However, chemical stability of this oxide is relatively poor. Originating from oxide’s high basicity BaCeO 3 reacts easily with H 2 CO , forming BaCO CeO Ba(OH) . At the same time zirconia based electrolyte, typically grain boundary resistance protons, exhibit good seems to be...
In this study, carbon support material, derived from coffee grounds was used in the preparation of Pt catalysts for polymer electrolyte membrane fuel cell (PEMFC) application. The material synthesized using ZnCl 2 activated pyrolysis method and nanoparticles were deposited onto by two methods: ethylene glycol or hydrogen as a reducing agent. Synthesis catalyst materials on ground successful produced with desirable physical electrochemical properties. through reduction method, gas diffusion...
In this work, we studied the effect of A-site deficiency and B-site chemical composition on electrical performance (La 0.25 Sr Ca 0.45 ) y Ti 0.95 Ni 0.05-x Mn x O 3-δ (x=0-0.05) (y=1, 0.9474) (LSCTNM-x) fuel electrode. The doped compositions were successfully synthesized by glycine-nitrate combustion method then characterized XRD SEM to confirm phase purity visualize microstructure electrode layers. Furthermore, DC four-probe conductivity measurements porous layers has been done understand...
(La,Sr)TiO 3-δ has attracted specific attention over the past years due to its superior dimensional stability, high conductivity, and significant tolerance against sulfur poisoning carbon depositions. To increase catalytic activity chemical many different doping levels stoichiometries for La x Sr 1-x TiO (LST) have been investigated [1, 2]. Doping of B-site with Mn shown promote electroreduction under SOFC conditions [3]. Furthermore, is known accept lower coordination numbers in...
Exploring alternative sources for platinum catalyst carbon support material is vital the further development of polymer electrolyte membrane fuel cells (PEMFC). 1 The and method depositing Pt nanoparticles are crucial defining catalytic properties catalyst. In this study, material, derived from coffee grounds was used in preparation catalysts PEMFC application. synthesized using ZnCl 2 activated pyrolysis were deposited onto by two methods: ethylene glycol 3 or hydrogen 4 as a reducing...
Different physical (FIB-TOF-SIMS, SXAS, XRD, high-temperature XRD under electrochemical working conditions, FIB-SEM-EDX, AFM, gas chromatography-mass spectrometry, BET) and (cyclic voltammetry, chronoamperometry impedance) methods have been applied for detailed analysis of solid oxide fuel cell materials. Solid co-electrolysis single cells based on Ni-free anodes/cathodes as well Ni-Ce0.9Gd0.1O2-d or Ni-Zr0.92Y0.08O2-d supporting anodes/cathodes, bi-layered Zr0.92Y0.08O2-d | Ce0.9Gd0.1O2-d...