A5082054099- Advancements in Battery Materials
- Advanced Battery Materials and Technologies
- Solid-state spectroscopy and crystallography
- Chemical Synthesis and Characterization
- Advanced Battery Technologies Research
- Extraction and Separation Processes
- Thermal Expansion and Ionic Conductivity
- Crystal Structures and Properties
- Ferroelectric and Piezoelectric Materials
- Transition Metal Oxide Nanomaterials
- Multiferroics and related materials
- Additive Manufacturing and 3D Printing Technologies
- Inorganic Chemistry and Materials
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Ionic liquids properties and applications
- Microwave Dielectric Ceramics Synthesis
- Food Chemistry and Fat Analysis
- Conducting polymers and applications
- Perovskite Materials and Applications
- Metal Extraction and Bioleaching
- Nanocomposite Films for Food Packaging
- Analytical Chemistry and Sensors
- Semiconductor materials and interfaces
- Thermal and Kinetic Analysis
Laboratoire de Réactivité et Chimie des Solides
2016-2025
Université de Picardie Jules Verne
2015-2025
Centre National de la Recherche Scientifique
2016-2025
Réseau sur le Stockage Electrochimique de l'énergie
2015-2024
Laboratoire de Glycochimie, des Antimicrobiens et des Agroressources
2023
Groupe de Recherche en Énergie Électrique de Nancy
2020
Institut de Chimie
2012-2019
Chimie du Solide et Energie
2014-2015
State University of New York
2009
Electrolytes are essential for the proper functioning of any battery technology and emerging Na-ion is no exception. Hence, a major focus on research to identify most appropriate formulation so as minimize interface reactions enhance both cell performances safety aspects. In order suitable electrolyte formulations chemistry we benchmarked various electrolytes containing diverse solvent mixtures (cyclic, acyclic carbonates, glymes) Na-based salts having either F-based or perchlorate anions...
The use of lithiated redox organic molecules containing electrochemically active C=O functionalities, such as oxocarbon salts, is proposed. These represent alternative electrode materials to those used in current Li-ion battery technology that can be synthesized from renewable starting materials. key material the tetralithium salt tetrahydroxybenzoquinone (Li(4)C(6)O(6)), which both reduced Li(2)C(6)O(6) and oxidized Li(6)C(6)O(6). In addition being directly by neutralization at room...
The crystal chemistry and the electrochemical properties upon Na<sup>+</sup> extraction/insertion of NASICON-type Na<sub>3</sub>Al<sub>y</sub>V<sub>2−y</sub>(PO<sub>4</sub>)<sub>3</sub> compositions (<italic>y</italic> = 0.1, 0.25 0.5) were investigated.
The electrocaloric effect was investigated in lead-free Zr doped Ba0.8Ca0.2(ZrxTi1−x)O3 (BCTZ) ceramics synthesized by a conventional sintering process. Room-temperature x-ray diffraction analysis showed that the tetragonal structure is obtained BCTZ for x ≤ 0.08 and pseudo cubic phase &gt; 0.08. dielectric spectroscopy calorimetry revealed Curie temperature decreases as consequence of doping exhibits first order ferroelectric transition. determined calculation change (ΔT) using Maxwell...
The importance of exploring new solid electrolytes for all-solid-state batteries has led to significant interest in NASICON-type materials. Here, the Sc3+-substituted NASICON compositions Na3ScxZr2–x(SiO4)2–x(PO4)1+x (termed N3) and Na2ScyZr2–y(SiO4)1–y(PO4)2+y N2) (x, y = 0–1) are studied as model Na+-ion conducting solid-state batteries. influence Sc3+ substitution on crystal structures local atomic environments been characterized by powder X-ray diffraction (XRD) neutron (NPD), well 23Na,...
The crystal structure of the NASICON Na3V2(PO4)3 phase (NVP) has been investigated as a function temperature. Combining laboratory and synchrotron X-ray powder diffraction with single diffraction, we demonstrate presence four polymorphs NVP from 30 to 225 °C. While high temperature γ-NVP crystallizes in classical rhombohedral cell (S.G. R3̅c, = 8.73382(4) Å, c 21.91438(17) Å), low α-NVP undergoes monoclinic distortion C2/c, 15.1244(6) b 8.7287(3) 21.6143(8) β 90.163(2)°) together an ordering...
Abstract Among the 3D-printing technologies, fused deposition modeling (FDM) represents a promising route to enable direct incorporation of battery within final 3D object. Here, preparation and characterization lithium iron phosphate/polylactic acid (LFP/PLA) SiO 2 /PLA 3D-printable filaments, specifically conceived respectively as positive electrode separator in lithium-ion is reported. By means plasticizer addition, active material loading raised high possible (up 52 wt.%) while still...
The routine access to electricity always means a drastic change in terms of quality life making it easier and safer. Consequently, the global electric demand both on off-the-grid is growing calls for ongoing innovation promote reliable, clean safe power supplies. In this context, development new chemistries batteries fuel cells could play critical role. From our prospects aiming at fostering concept sustainable organic batteries, we report article peculiar properties dilithium...
Additive manufacturing technologies open the way to direct-integration of electronics and solid-state battery within final 3D object. Here, a printable polyethylene oxide/lithium bis(trifluoromethanesulfonyl)imide (PEO/LiTFSI) filament (2.18 × 10 −3 S cm −1 at 90 °C) optimized be used as solid polymer electrolyte in lithium-ion is produced feed fused deposition modeling (FDM) 3D-printer. Due its relatively poor mechanical properties compared classical such polylactic acid (PLA), deep...
Na3PS4 is one of the most promising Na+ conductors, relevant for applications that can leverage its high ionic conductivity, such as solid-state batteries. Currently, two crystalline phases material have been identified, and it has thought to melt above 500 °C. In contrast, based on diffraction, ab initio simulations, impedance spectroscopy, thermal analysis, we show remains solid this temperature transforms a third polymorph, γ, exhibiting fast-ion conduction an orthorhombic crystal...
In this work, we investigate the crystal chemistry of Fe/V-mixed NASICON [sodium (Na) Super Ionic CONductor] compositions Na3FeV(PO4)3 and Na4FeV(PO4)3 that are structurally related to Na3V2(PO4)3, a positive electrode for Na-ion batteries. To synthesize Na4FeV(PO4)3, various synthesis routes (solid-state, sol–gel-assisted, electrochemical syntheses) were investigated. Direct syntheses resulted in formation NASICON-type phase presence NaFePO4 Na3PO4 impurities. The successful preparation...
The thermal behavior under air of LiFePO4-based powders was investigated through the combination several techniques such as temperature-controlled X-ray diffraction, thermogravimetric analysis and Mössbauer NMR spectroscopies. reactivity with at moderate temperatures depends on particle size leads to progressive displacement Fe from core structure yielding nano-size Fe2O3 highly defective, oxidized LixFeyPO4 compositions whose unit-cell volume decreases dramatically when temperature is...
Highly conductive solid electrolytes are fundamental for all solid-state batteries with low inner cell resistance. Such fast often found by systematic substitution experiments in which one atom is exchanged another, and corresponding changes ionic transport monitored. With this strategy, compositions the most promising properties can be identified reliably. However, of element does not only influence crystal structure diffusion channel size (static) but also underlying bonding interactions...
Solid electrolytes are crucial for next-generation solid-state batteries, and Na3PS4 is one of the most promising Na+ conductors such applications, despite outstanding questions regarding its structural polymorphs. In this contribution, we present a detailed investigation evolution in structure dynamics over wide temperature range 30 < T 600 °C through combined experimental–computational analysis. Although Bragg diffraction experiments indicate second-order phase transition from tetragonal...
We report on the fabrication of sub-20 nm BiFeO3 (BFO) nanoparticles using a solid-state approach and preferential leching process. The were subsequently used to deposit, through spray pyrolysis, BFO thin films in rhombohedral (R3c) crystallographic structure. Then, systematic investigations optical photocatalytic properties conducted determine effects particles size, microstructure increased surface area their catalytic performances. Especially, improved observed, with an bandgap energy...
Chiral ionic liquids (CILs) tetrabutylammonium-(S)-prolinate, tetrabutylammonium-(R)-prolinate and tetrabutylammonium trans-4-hydroxy-(S)-prolinate were investigated as chiral additives in the Pd-catalyzed enantioselective hydrogenation of α,β-unsaturated ketones. These CILs easily prepared one step from aminoacid hydroxide characterized (NMR, IR, optical rotation, elemental analysis, DSC, viscosity, decomposition temperature). The research strategy was to assess antimicrobial toxicity (>20...