A5028296992- Advanced Battery Materials and Technologies
- Inorganic Fluorides and Related Compounds
- Advancements in Battery Materials
- Advanced Battery Technologies Research
- Advanced battery technologies research
- Electrocatalysts for Energy Conversion
- Inorganic Chemistry and Materials
- Advancements in Solid Oxide Fuel Cells
- Crystal Structures and Properties
- Advanced Condensed Matter Physics
- Ga2O3 and related materials
- Magnetic and transport properties of perovskites and related materials
- Crystallization and Solubility Studies
Technical University of Darmstadt
2018-2022
University of Stuttgart
2021-2022
Material (Belgium)
2019
Abstract Fluoride ion batteries (FIBs) are a recent alternative all-solid-state battery technology. However, the FIB systems proposed so far suffer from poor cycling performance. In this work, we report La 2 NiO 4.13 with Ruddlesden-Popper type structure as an intercalation-based active cathode material in all solid-state excellent The critical charging conditions to maintain conductivity of cell were determined, which seems be major obstacle towards improving stability FIBs. For optimized...
The Ruddlesden–Popper (K2NiF4) type phase La2NiO3F2 was prepared via a polymer-based fluorination of La2NiO4+d. compound found to crystallize in the orthorhombic space group Cccm (a = 12.8350(4) Å, b 5.7935(2) c 5.4864(2) Å). This structural distortion results from an ordered half occupation interstitial anion layers and has not been observed previously for K2NiF4-type oxyfluoride compounds. From combination neutron X-ray powder diffraction 19F magic-angle spinning NMR spectroscopy, it that...
Composite electrolytes comprising a polymer plus Li salt matrix and embedded fillers have the potential of realizing high lithium-ion conductivity, good mechanical properties, wide electrochemical operational window, stability against metallic lithium, all which are essential for development high-energy-density all-solid-state batteries. In this study, solvent-free approach has been used to prepare composite with tetragonal cubic phase garnets synthesized via nebulized spray pyrolysis...
Within this article, it is shown that an electrochemical defluorination and additional fluorination of Ruddlesden–Popper-type La2NiO3F2 possible within all-solid-state fluoride-ion batteries. Structural changes the reduced oxidized phases have been examined by X-ray diffraction studies at different states charging discharging. The synthesis phase La2NiO3F2+x proved to be successful structural analysis using both powder automated electron tomography techniques. reversibility on...
Perovskite oxides with mixed ionic and electronic conductivities are very promising candidates for their application as energy materials related to fuel cell metal air battery integration.
Abstract A new vacancy ordered, anion deficient perovskite modification with composition of BaCoO 2.67 (Ba 3 Co O 8 □ 1 ) has been prepared via a two‐step heating process. Combined Rietveld analysis neutron and X‐ray powder diffraction data shows novel ordering oxygen vacancies not known before for barium cobaltates. combination diffraction, magnetic measurements, density functional theory (DFT) studies confirms G‐type antiferromagnetic ordering. From impedance the electronic conductivity...
In this study we present gas-phase fluorination as a method to create thin LiF layer on Li6.5La3Zr1.5Ta0.5O12 (LLZTO). We compared these fluorinated films with produced by RF-magnetron sputtering, where investigated the interface between LLZTO and deposited showing no formation of reaction layer. Furthermore, ability protection against Li2CO3 in ambient air. By this, show that is absent at surface after 24 h air, supporting protective character formed films, hence potentially enhancing...
In this study we present gas-phase fluorination as a method to create thin LiF layer on Li6.5La3Zr1.5Ta0.5O12 (LLZTO). We compare these fluorinated films with produced by RF-magnetron sputtering, where investigated the interface between LLZTO and deposited showing no formation of reaction layer. Furthermore, investigate ability protection against Li2CO3 in ambient air. By show that is absent at surface after 24 h air supporting protective character formed hence could enhance handling for...