A5086866654- Advancements in Battery Materials
- Advanced Battery Materials and Technologies
- Transition Metal Oxide Nanomaterials
- Polyoxometalates: Synthesis and Applications
- Advanced Battery Technologies Research
- Inorganic Chemistry and Materials
- Electronic Packaging and Soldering Technologies
- Thermal Expansion and Ionic Conductivity
- Chemical Synthesis and Characterization
- Extraction and Separation Processes
- Supercapacitor Materials and Fabrication
- Inorganic Fluorides and Related Compounds
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Advanced NMR Techniques and Applications
- Conducting polymers and applications
- Metal Extraction and Bioleaching
- Electrochemical Analysis and Applications
- Advanced Chemical Sensor Technologies
- Electrocatalysts for Energy Conversion
- Advanced battery technologies research
- High-Velocity Impact and Material Behavior
- Mechanical Behavior of Composites
- Energetic Materials and Combustion
- Sulfur-Based Synthesis Techniques
Institut de Chimie de la Matière Condensée de Bordeaux
2019-2024
University of California, San Diego
2022-2024
Centre National de la Recherche Scientifique
2017-2023
Laboratoire de Réactivité et Chimie des Solides
2018-2023
Intel (United States)
2023
Poughkeepsie Public Library District
2023
Marko-Kolor (Poland)
2023
Université de Picardie Jules Verne
2018-2023
MicroVision (United States)
2023
Gorgias Press (United States)
2023
All-solid-state batteries (ASSBs) are one of the most promising systems to enable long-lasting and thermally resilient next-generation energy storage. Ideally, these should utilize low-cost resources with reduced reliance on critical materials. Pursuing cobalt- nickel-free chemistries, like LiFePO4 (LFP), is a strategy. Morphological features LFP essential for improved electrochemical performance highlighted elucidate interfacial challenges when implemented in ASSBs, since adoption inorganic...
Abstract All‐solid‐state sodium ion batteries (AS 3 iBs) are highly sought after for stationary energy storage systems due to their suitable safety and stability over a wide temperature range. Hard carbon (HC), which is low cost, exhibits redox potential, high capacity, integral achieve practical large‐scale sodium‐ion battery. However, the density of battery utilizing this anode material hampered by its initial Coulombic efficiency (ICE). Herein, two strategies, namely i) additional...
Sodium-ion batteries exhibit significant promise as a viable alternative to current lithium-ion technologies owing their sustainability, low cost per energy density, reliability, and safety.
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,...
One approach to increase the energy density of all-solid-state batteries (ASSBs) is use high-voltage cathode materials. The spinel LiNi0.5Mn1.5O4 (LNMO) one such example, as it offers a high reaction potential (close 5 V). Moreover, Co-free system, which makes an environmentally friendly and low-cost alternative. However, several challenges must be addressed before can properly adopted in ASSB technologies. Herein, we reveal that lithium argyrodite (Li6PS5Cl), sulfide solid-state electrolyte...
Abstract Manufacturing sustainable sodium ion batteries with high energy density and cyclability requires a uniquely tailored technology close attention to the economical environmental factors. In this work, we summarized most important design metrics in emphasis on cathode materials outlined transparent data reporting approach based common for performance evaluation of future technologies. Sodium-ion are considered as one promising alternatives lithium-based battery Despite growing research...
All-solid-state batteries have recently gained considerable attention due to their potential improvements in safety, energy density, and cycle-life compared conventional liquid electrolyte batteries. Sodium all-solid-state also offer the eliminate costly materials containing lithium, nickel, cobalt, making them ideal for emerging grid storage applications. However, significant work is required understand persisting limitations long-term cyclability of Na all-solid-state-based In this work,...
Investigation of the effects Al substitution for V on structural properties and electrochemical performances two most promising positive electrode materials Na-ion batteries, Na<sub>3</sub>V<sub>2</sub>(PO<sub>4</sub>)<sub>2</sub>F<sub>3</sub> Na<sub>3</sub>V<sub>2</sub>(PO<sub>4</sub>)<sub>2</sub>FO<sub>2</sub>.
Exploring and tailoring new high energy density positive electrode materials is still a challenge for alkali-ion batteries. In this work, we synthesized the mixed anion phases KVPO4F1–yOy (y = 0, 0.25, 0.5, 0.75, 1) determined their crystallographic electronic structures by combining synchrotron X-ray diffraction, absorption spectroscopy at vanadium K edge, 31P MAS NMR coupled with functional theory calculations. These experiments confirmed that substitution of F– O2– anions occurs as solid...
The local and electronic structures of Na3V2(PO4)2F3–Na3V2(PO4)2FO2 electrode materials have been investigated by a combination 23Na 31P magic-angle spinning NMR spectroscopy density functional theory calculations. spin distributions the Fermi contact shifts in these are calculated based on projector augmented wave approach implemented VASP code. Upon oxygen substitution, V4+ ions formed involved highly covalent vanadyl bonds. We show that they exhibit very specific structure with single...
We here present the synthesis of a new material, Na3(VO)Fe(PO4)2F2, by sol–gel method. Its atomic and electronic structural descriptions are determined combination several diffraction spectroscopy techniques such as synchrotron X-ray powder absorption at V Fe K edges, 57Fe Mössbauer, 31P solid-state nuclear magnetic resonance spectroscopy. The crystal structure this newly obtained phase is similar to that Na3(VO)2(PO4)2F, with random distribution Fe3+ ions over vanadium sites. Even though...
The redox processes involved in the Na+ deintercalation from Na3V2(PO4)2F3, Na3V2(PO4)2F2O, and Na3V2(PO4)2F1.5O1.5 are investigated operando by synchrotron X-ray absorption spectroscopy at vanadium K-edge. A continuous evolution pre-edge edge regions is observed for three compositions, which good agreement with a progressive oxidation of vanadium. In oxygen-substituted Na3V2(PO4)2F2O Na3V2(PO4)2F1.5O1.5, F–V3+O4–F F–V4+O4═O centers coexist can be simultaneously activated owing to reverse...
Current performances of Li-, Na-, or K-ion batteries are mainly limited by the specific capacity positive electrode. Therefore, it is important to reach highest possible for a given electrode material. Here, we investigate performance limitation KVPO4F, prospective material batteries, which can deliver only 80% its theoretical capacity. We discover that KVPO4F related kinetic competition between K+ deinsertion and side reactions ascribed electrolyte degradation at high potentials. Homeotypic...
Abstract Non‐equilibrium defects often dictate the macroscopic properties of materials. They largely define reversibility and kinetics processes in intercalation hosts rechargeable batteries. Recently, imaging methods have demonstrated that transient dislocations briefly appear during ion diffusion. Despite new discoveries, understanding impact, formation self‐healing mechanisms defects, including beyond dislocations, is lacking. Here, operando X‐ray Bragg Coherent Diffractive Imaging (BCDI)...
Abstract Identification of efficient cathode materials represents a huge challenge for development reversible Mg‐ion batteries (MIBs). Herein, we report on the preparation copper molybdenum sulfide (Cu 2 MoS 4 ) in novel microstructure, namely nanotube with square‐cross‐section, and its use as material battery. The Cu was prepared via one‐pot hydrothermal method using O nanocubes sacrificial template. belongs to top‐tier MIBs that shows remarkable specific capacity 390.5 mAh g −1 .
Polyanionic Na3V2(PO4)2FO2 has been successfully prepared for the first time by ionothermal reaction in 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide (EMIM TFSI) ionic liquid. Its structure and elemental stoichiometry are confirmed X-ray diffraction, NMR spectroscopy, ICP-OES, respectively. Furthermore, scanning electron microscopy reveals that as-obtained material possesses an original platelet-like morphology. A topochemical mechanism is proposed to explain formation of 3D...
A new fluorophosphate polyanionic compound has been made by Ag<sup>+</sup>/Na<sup>+</sup> ion exchange, leading to several potential technological applications.
Solutions made of tetraglyme (G4) containing Ca(TFSI)2 have been studied as models to understand the solvation structure and conductivity properties multivalent ions in low dielectric constant ethereal electrolytes. These solutions characterised using electrochemical impedance spectroscopy, rheological measurement, Raman spectroscopy. The ionic these electrolytes shows an intriguing non-monotonic behaviour with temperature which deviates from semi-empirical Vogel-Tammann-Fulcher equation at...
Abstract The electrochemical activity of solvated Ca 2+ in glyme‐based electrolytes is investigated using grand canonical density functional theory approach and Fukui functions. obtained results reveal that the length glyme molecules has little effect on reduction potentials, but significant impacts effective electron transfer process. In short chain glymes, transferred located a center organic part solvation sphere, leading to direct partial degradation molecules. As glyme's increases,...