Li-S rechargeable batteries are attractive for electric transportation because of their low cost, environmentally friendliness, and superior energy density. However, the system has yet to conquer marketplace, owing its drawbacks, namely, soluble polysulfide formation. To tackle this issue, we present here a strategy based on use mesoporous chromium trimesate metal-organic framework (MOF) named MIL-100(Cr) as host material sulfur impregnation. Electrodes containing impregnated within pores...

By exploiting the ability of ionic liquids to solubilize molecular sulfur at melting point, we report electrodeposition CuS in an [EMIm]TFSI (1-ethyl-3-methylimidazolium bis (trifluoromethanesulfonyl) imide) electrolytic bath containing Cu(TFSI)2 salt and elemental sulfur. Single-crystal preferentially oriented covellite thin films with flake morphology have been successfully obtained. Li/CuS coin cells using deposits after carbon coating as positive electrode show a discharge capacity 350...

This work provides an illustration that density functional theory (DFT) + $U$ calculations may quantitatively describe transport phenomena in uranium dioxide. Oxygen diffusion mechanisms are investigated using both ab initio and experimental approaches mainly involving self-diffusion coefficient measurements. The dependences of the data upon oxygen potential sample impurity content demonstrate, by comparison with basic point defect theory, migration occurs via interstitial mechanism....

As for other multivalent systems, the interface between calcium (Ca) metal anode and electrolyte is of paramount importance reversible plating/stripping.

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...

Recently, sodium-ion batteries have been intensively studied as an alternative to lithium-ion because of the abundance sodium and its ability, for example, answer smart grid energy storage applications. Among all anode materials, carbonaceous materials shown promising results, particularly hard carbons their high capacity low insertion voltage (vs Na+/Na). However, these often suffer from cost initial Coulombic efficiency. In this paper, we investigate easy route carbon synthesis low-cost...

Aims. Olivine surfaces have been subjected to low-energy ion irradiation with H+, He+ and Ar+ at energies within the keV range in order simulate effects of energetic gas-grain interactions shocked regions interstellar medium.

Iron-doped nanocrystalline particles of anatase TiO2 (denoted x% Fe-TiO2, with x the nominal [Fe] atom % in solution) have been successfully synthesized at room temperature by a controlled two-step process. Hydrolysis titanium isopropoxide is first achieved to precipitate Ti(OH)4 species. A fine control pH allows one maintain (i) soluble iron species and (ii) sluggish solubility promote dissolution condensation clusters incorporating iron, leading precipitation iron-doped TiO2. The does then...

Highly defective LiFePO4 powders were synthesized via a modified version of the coprecipitation in aqueous medium method using oxidizing experimental conditions. A pure olivine phase containing 44 at. % Fe3+ was obtained after only 10 min at 108 °C, and evolution structure purity followed during reaction. The nature native defects their influence on crystallographic electrochemical reaction mechanisms thoroughly studied by combination ex situ methods, high-resolution transmission electron...

A 2D-layered conjugated organic lithium carboxylate based on 4,4′-biphenyl core has been synthesized and characterized by combining powder X-ray diffraction, two-dimensional solid-state 13C NMR, high-resolution transmission electron microscopy. The combination of these complementary technics identifies both molecular packing structural organization within the solid. electrochemical performances this new negative electrode have evaluated. specific 2D-layer offered framework confers to...

Abstract This work sheds light on the exceptional robustness of anatase TiO 2 when it is downsized to an extreme value 4 nm. Since at this size surface contribution volume becomes predominant, turns out that material significantly resistant against particles coarsening with temperature, entailing a significant delay in rutile phase transition, prolonging up 1000 °C air. A noticeable alteration stability diagram lithium insertion also experienced. Lithium such nanocrystalline converts into...

The increasing demand for rechargeable batteries induces the development of greener and better devices. Significant advances have been made in last decade together with a renewed interest organic electrode materials. Thus, stable electron-donating materials are candidates "greener" molecular (metal-free). Herein, we report design monomeric p-type N-substituted phenothiazine salt as an efficient anionic host structure working reversibly dual-ion cell configuration using lithium negative...

3d-metal fluorosulphates that have a tavorite-type structure (e.g., LiFeSO4F) were recently reported as attractive positive electrode candidates for future Li-ion batteries aimed at large volume markets. These new had to be synthesized via ionothermal synthesis owing both their thermal instability temperatures greater than 300 °C and water solubility. In an attempt depart from synthesis, low-temperature solid-state reactions solvothermal processes successfully tried. The latter technique,...

Among the various additive manufacturing processes, material extrusion techniques recently emerged as an encouraging option in order to 3D-print lithium-ion battery components. In this work, overview of recent advances and progress on ink extrusion, known liquid deposition modeling (LDM), well thermoplastic process, originally trademark Fused Deposition Modeling (FDM), is discussed. Representing a promising route achieve complete batteries single print without necessity perform any...

A schematic representation of three interlinked broad failure modes observed.

Abstract Calcium‐metal batteries have received growing attention recently after several studies reporting successful metal plating and stripping with organic electrolytes. Given the low redox potential of metallic calcium, its surface is commonly covered by a passivation layer grown accumulation electrolyte decomposition products. The presence borate species in this has been shown to be key parameter allowing for Ca 2+ migration favoring electrodeposition. Here, boron‐based additives are...

The H2 bubbles resulting from the reaction of freshly prepared Si powders with water were found to impede large-scale preparation aqueous-based Si/CMC (Na-Carboxy-Methyl-Cellulose)/C slurries and could consequently prevent production composite electrode films. To understand possibly control this reaction, silicon particles (Siref) have been partially oxidized either by contact or air heating at elevated temperatures. By coupling kinetics, XRD, (HR)TEM/EELS, TGA/DSC, IR gas adsorption data,...

Aims.We present laboratory studies of the micro-structural evolution an amorphous ferro-magnesian silicate, olivine composition, following thermal annealing under vacuum.Methods.The silicate was prepared as a thin film on diamond substrate. Annealing vacuum performed at temperatures ranging from 870 to 1020 K. After films were extracted substrate and analysed by transmission electron microscopy infer their microstructural compositional evolution.Results.Spheroidal metallic nano-particles...

LiFePO4 has been under intense scrutiny over the past decade because it stands as an attractive positive electrode material for next generation of Li-ion batteries to power electric vehicles and hybrid vehicles, hence importance its thermal behavior. The reactivity with air at moderate temperatures is shown be dependent on particle size. For nanosized materials, a progressive displacement Fe from core structure leading composite made nanosize Fe2O3 highly defective, oxidized LixFeyPO4...

We report an in-depth study focusing on the stability of a benchmark electrolyte composition based low-volatile 3-methoxypropionitrile (MPN) solvent employed in dye-sensitized solar cells. In presence TiO2, semi-conductor surface plays catalytic role thermal degradation electrolyte, which induces, among other effects, nucleation and growth uniform solid interphase (SEI) layer that wraps TiO2. On basis our actual understanding, we argue SEI formation is responsible for triiodide depletion...