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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Ahmadi, Majid
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (28/28 displayed)
- 2024Giant electrostriction-like response from defective non-ferroelectric epitaxial BaTiO3 integrated on Si (100)citations
- 2024Strong Substrate Influence on Atomic Structure and Properties of Epitaxial VO 2 Thin Filmscitations
- 2024Strong substrate influence on atomic structure and properties of epitaxial VO2 thin filmscitations
- 2024Domains with Varying Conductance in Tensile Strained SrMnO3 Thin Films Using Out-of-Plane Electric Fieldscitations
- 2024Domains with Varying Conductance in Tensile Strained SrMnO 3 Thin Films Using Out-of-Plane Electric Fieldscitations
- 2024Growth mechanism of oleylammonium-based tin and lead bromide perovskite nanostructurescitations
- 2024Giant electrostriction-like response from defective non-ferroelectric epitaxial BaTiO 3 integrated on Si (100)citations
- 2024Metal-Solvent Complex Formation at the Surface of InP Colloidal Quantum Dotscitations
- 2023Strong substrate influence on atomic structure and properties of epitaxial VO2 thin filmscitations
- 2023Van der Waals Epitaxy of Pulsed Laser Deposited Antimony Thin Films on Lattice-matched and Amorphous Substratescitations
- 2023Van der Waals Epitaxy of Pulsed Laser Deposited Antimony Thin Films on Lattice-matched and Amorphous Substratescitations
- 2023Effects of Intermixing in Sb2Te3/Ge1+xTe Multilayers on the Thermoelectric Power Factorcitations
- 2023Nickel Boride (Ni x B) Nanocrystals:From Solid-State Synthesis to Highly Colloidally Stable Inkscitations
- 2023Nickel Boride (NixB) Nanocrystalscitations
- 2022Phase Separation in Ge-Rich GeSbTe at Different Length Scales: Melt-Quenched Bulk versus Annealed Thin Filmscitations
- 2021Editors' Choice - Dealloying-Driven Cerium Precipitation on Intermetallic Particles in Aerospace Aluminium Alloyscitations
- 2020Locally Condensed Water as a Solution for In Situ Wet Corrosion Electron Microscopycitations
- 2020Infrared absorbance of vertically-aligned multi-walled CNT forest as a function of synthesis temperature and timecitations
- 2020How Mn/Ni Ordering Controls Electrochemical Performance in High-Voltage Spinel LiNi0.44Mn1.56O4 with Fixed Oxygen Contentcitations
- 2020How Mn/Ni Ordering Controls Electrochemical Performance in High-Voltage Spinel LiNi0.44Mn1.56O4with Fixed Oxygen Contentcitations
- 2019Growth of multi-layered graphene on molybdenum catalyst by solid phase reaction with amorphous carboncitations
- 2014Highly protective performance of water-based epoxy coating loaded with self-doped nanopolyaniline synthesized under supercritical CO2 conditioncitations
- 2014Surface energy engineering for tunable wettability through controlled synthesis of MoS2citations
- 2013Large scale synthesis of single-crystal and polycrystalline boron nitride nanosheetscitations
- 2013Synthesis, characterization and understanding of the mechanisms of electroplating of nanocrystalline-amorphous nickel-tungsten alloys using in situ electrochemical impedance spectroscopycitations
- 2013Single-step route to hierarchical flower-like carbon nanotube clusters decorated with ultrananocrystalline diamondcitations
- 2012Water-soluble derivatives of octanuclear iron-oxido-pyrazolato complexes - An experimental and computational studycitations
- 2012Single-step route to diamond-nanotube compositecitations
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article
How Mn/Ni Ordering Controls Electrochemical Performance in High-Voltage Spinel LiNi0.44Mn1.56O4with Fixed Oxygen Content
Abstract
<p>The crystal structure of LiNi0.5Mn1.5O4 (LNMO) can adopt either low-symmetry ordered (Fd3¯ m) or high-symmetry disordered (P4332) space group depending on the synthesis conditions. A majority of published studies agree on superior electrochemical performance of disordered LNMO, but the underlying reasons for improvement remain unclear due to the fact that different thermal history of the samples affects other material properties such as oxygen content and particle morphology. In this study, ordered and disordered samples were prepared with a new strategy that renders samples with identical properties apart from their cation ordering degree. This was achieved by heat treatment of powders under pure oxygen atmosphere at high temperature with a final annealing step at 710 °C for both samples, followed by slow or fast cooling. Electrochemical testing showed that cation disordering improves the stability of material in charged (delithiated) state and mitigates the impedance rise in LNMO-1LTO (Li4Ti5O12) and LNMO-1Li cells. Through X-ray photoelectron spectroscopy (XPS), thicker surface films were observed on the ordered material, indicating more electrolyte side reactions. The ordered samples also showed significant changes in the Ni 2p XPS spectra, while the generation of ligand (oxygen) holes was observed in the Ni-O environment for both samples using X-ray absorption spectroscopy (XAS) and resonant inelastic X-ray scattering (RIXS). Moreover, high-resolution transmission electron microscopy (HRTEM) images indicated that the ordered samples show a decrease in ordering near the particle surface after cycling and a tendency toward rock-salt-like phase transformations. These results show that the structural arrangement of Mn/Ni (alone) has an effect on the surface and "near-surface"properties of LNMO, particularly in delithiated state, which is likely connected to the bulk electronic properties of this electrode material.</p>