A5022801469- Hydrogen Storage and Materials
- Advanced Battery Materials and Technologies
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Advancements in Battery Materials
- Inorganic Chemistry and Materials
- Nuclear Materials and Properties
- Advanced Battery Technologies Research
- Superconductivity in MgB2 and Alloys
- Chemical Synthesis and Characterization
- Thermal Expansion and Ionic Conductivity
- Thermodynamic and Structural Properties of Metals and Alloys
- Advanced NMR Techniques and Applications
- Ammonia Synthesis and Nitrogen Reduction
- Catalytic Processes in Materials Science
- MXene and MAX Phase Materials
- Hybrid Renewable Energy Systems
- Quantum, superfluid, helium dynamics
- Boron Compounds in Chemistry
- Electrocatalysts for Energy Conversion
- Inorganic Fluorides and Related Compounds
- Graphite, nuclear technology, radiation studies
- CO2 Reduction Techniques and Catalysts
Utrecht University
2021-2024
University of Turin
2019-2024
National Interuniversity Consortium of Materials Science and Technology
2021-2024
Collaborative Innovation Center of Quantum Matter
2023
Torino e-district
2020
University of Geneva
2019
Solid-state ion conductors are gaining increasing importance, among other conductors, to enable a transition next-generation all-solid-state Li batteries. However, few lightweight and low-cost materials show sufficiently high Li-ion conduction at room temperature be used as solid electrolytes. Here, we report the effect of adding nanosized oxides, SiO2, CaO, MgO, γ-Al2O3, TiO2, ZrO2, LiBH4 by ball-milling. In all cases, conductivity was greatly enhanced. For which has been reported before...
LiBH4 has been widely studied as a solid-state electrolyte in Li-ion batteries working at 120 °C due to the low ionic conductivity room temperature. In this work, by mixing with MgO, of improved. The optimum composition mixture is 53 v/v % showing 2.86 × 10–4 S cm–1 20 °C. formation composite does not affect electrochemical stability window, which similar that pure (about 2.2 V vs Li+/Li). incorporated TiS2/Li all-solid-state battery. A test temperature showed only five cycles already...
Abstract Intense literature and research efforts have focussed on the exploration of complex hydrides for energy storage applications over past decades. A focus was dedicated to determination their thermodynamic hydrogen properties, due high gravimetric volumetric capacities, but application has been limited because harsh working conditions reversible release uptake. The present review aims at appraising recent advances different hydride systems, coming from proficient collaborative...
Abstract The development of efficient storage systems is one the keys to success energy transition. There are many ways store energy, but among them, electrochemical particularly valuable because it can electrons produced by renewable energies with a very good efficiency. However, solutions currently available on market remain unsuitable in terms capacity, recharging kinetics, durability, and cost. Technological breakthroughs therefore expected meet growing need for storage. Within framework...
Abstract Solid‐state electrolytes (SSEs) with high ionic conductivities are crucial for safer and high‐capacity batteries. Interface effects in nanocomposites of SSEs insulators can lead to profound increases conductivity. Understanding the composition interface is tuning conductivity composite solid electrolytes. Herein, X‐ray Raman Scattering (XRS) spectroscopy used first time unravel nature responsible enhancements complex hydride‐based (LiBH 4 , NaBH NaNH 2 ) oxides. XRS probe Li, Na, B...
This study shows a flexible system that offers promising candidates for Li-based solid-state electrolytes. The Br– substitution BH4– stabilizes the hexagonal structure of LiBH4 at room temperature (RT), whereas Cl– is soluble only higher temperatures. Incorporation chloride in solid solution leads to an increase energy density system. For first time, stable containing both and Br-halide anions has been obtained RT. LiBH4–LiBr–LiCl ternary phase diagram determined RT by X-ray diffraction...
Complex metal hydrides have recently gained interest as solid electrolytes for all-solid-state batteries due to their light weight, easy deformability, and fast ion mobility at elevated temperatures. However, increasing low conductivity room temperature is a prerequisite application. In this review, two strategies enhance in complex hydrides, nanostructuring nanocomposite formation, are highlighted. First, the recent achievements nanostructured hydride-based conductors hydride/metal oxide...
The body-centered cubic (bcc) polymorph of NaCB11H12 has been stabilized at room temperature by high-energy mechanical milling. Temperature-dependent electrochemical impedance spectroscopy shows an optimum 45-min milling time, leading to rt conductivity 4 mS cm-1. Mechanical suppresses order-disorder phase transition in the investigated range. Nevertheless, two main regimes can be identified, with clearly distinct activation energies. Powder X-ray diffraction and 23Na solid-state NMR reveal...
Abstract Sodium‐based complex hydrides have recently gained interest as electrolytes for all‐solid‐state batteries due to their light weight and high electrochemical stability. Although room temperature conductivities are not sufficiently battery application, nanocomposite formation with metal oxides has emerged a promising approach enhance the ionic conductivity of hydrides. This enhancement is generally attributed space charge layer at hydride‐oxide interface. However, in this study it...
The hexagonal structure of LiBH 4 at room temperature can be stabilised by substituting the BH − anion with I , leading to high Li-ion conductive materials.
We report that the addition of silica nanoparticles to iodide-substituted LiBH4 (h-Li(BH4)0.8(I)0.2) improves ion conductivity and, remarkably, cycle life all-solid state batteries. The h-Li(BH4)0.8(I)0.2-SiO2 was synthesized by mechanochemical treatment and possesses a Li+ 9.3 × 10–5 S cm–1 at RT. It has an electrochemical stability window about 2.5 V vs Li+/Li improved against Li-metal, compared h-Li(BH4)0.8(I)0.2, owing oxide nanoparticles, which we ascribed greater mechanical solid-state...
Hydride-ion conductors and mixed hydride-electronic are promising materials for various applications, especially in (electro)chemical energy conversion storage. Many of the hydride-ion discovered to date oxyhydrides with K2NiF4-type structure. In this work, Cs2CaH4 Rb2CaH4, which crystallize structure, were synthesized electrochemically characterized. By employing electrochemical impedance spectroscopy (EIS) single-step chronoamperometry measurements, it is found that both show...
This work suggests that topological analysis can adequately explain the ion conductivity in complex hydrides.
Because substitutions of BH4– anion with Br– can stabilize the hexagonal structure LiBH4 at room temperature, leading to a high Li-ion conductivity, its thermodynamic stability has been investigated in this work. The binary LiBH4–LiBr system explored by means X-ray diffraction and differential scanning calorimetry, combined an assessment properties. monophasic zone Li(BH4)1–x(Br)x solid solution defined equal 0.30 ≤ x 0.55 30 °C. Solubility limits have determined situ various temperatures....
Due to the high cost and limited availability of lithium, Mg-based batteries are currently being investigated as a promising alternative. A critical component in these is electrolyte, with all-solid-state ones that show superior safety features but must guarantee adequate ionic conductivity be viable for applications. In this work, metal borohydride ammonia borane complex, Mg(BH4)2(NH3BH3)2, was theoretically using state-of-the-art ab initio methods based on density functional theory (DFT)...
Complex hydrides, such as LiBH4, are a promising class of ion conductors for all-solid-state batteries, but their application is constrained by low mobility at room temperature. Mixing with halides or complex hydride anions, i.e., other an effective approach to improving the ionic conductivity. In present study, we report on reaction LiBH4 LiBF4, resulting in formation conductive composites consisting LiF and lithium closo-borates. It believed that in-situ closo-borate related species gives...
Abstract Silver electrocatalysts offer the possibility to produce CO by converting 2 , enabling use of a greenhouse gas as chemical building block. Compared nanoparticles, silver nanowires show an enhanced selectivity towards CO. Recent publications proved that oxide‐derived can exhibit better catalytic performance than pristine metal phase, but have not been investigated. In this work, we report for first time electrocatalytic properties nanowires, synthesized via polyol method, and...
Thermal polymorphism in the alkali-metal salts incorporating icosohedral monocarba-hydridoborate anion, CB11H12−, results intriguing dynamical properties leading to superionic conductivity for lightest analogues, LiCB11H12 and NaCB11H12. As such, these two have been focus of most recent CB11H12− related studies, with less attention paid heavier salts, such as CsCB11H12. Nonetheless, it is fundamental importance compare nature structural arrangements interactions across entire series....
Solid-state sodium ion conductors are crucial for the next generation of all-solid-state batteries with high capacity, low cost, and improved safety. Sodium closo-carbadodecaborate (NaCB
In this work, the combined effects of anion substitution (with Br− and I−) SiO2 addition on Li-ion conductivity in LiBH4 have been investigated. Hexagonal solid solutions with different compositions, h-Li(BH4)1−α(X)α (X = Br, I), were prepared by ball milling fully characterized. The most conductive composition for each system was then mixed amounts nanoparticles. If amount added complex hydride fills original pore volume silica, both LiBH4-LiBr/SiO2 LiBH4-LiI/SiO2 systems, further increased...