| People | Locations | Statistics |
|---|---|---|
| Naji, M. |
| |
| Motta, Antonella |
| |
| Aletan, Dirar |
| |
| Mohamed, Tarek |
| |
| Ertürk, Emre |
| |
| Taccardi, Nicola |
| |
| Kononenko, Denys |
| |
| Petrov, R. H. | Madrid |
|
| Alshaaer, Mazen | Brussels |
|
| Bih, L. |
| |
| Casati, R. |
| |
| Muller, Hermance |
| |
| Kočí, Jan | Prague |
|
| Šuljagić, Marija |
| |
| Kalteremidou, Kalliopi-Artemi | Brussels |
|
| Azam, Siraj |
| |
| Ospanova, Alyiya |
| |
| Blanpain, Bart |
| |
| Ali, M. A. |
| |
| Popa, V. |
| |
| Rančić, M. |
| |
| Ollier, Nadège |
| |
| Azevedo, Nuno Monteiro |
| |
| Landes, Michael |
| |
| Rignanese, Gian-Marco |
|
Younesi, Reza
Uppsala University
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (22/22 displayed)
- 2022Importance of Superstructure in Stabilizing Oxygen Redox in P3-Na0.67Li0.2Mn0.8O2citations
- 2022Concentrated LiFSI-Ethylene Carbonate Electrolytes and Their Compatibility with High-Capacity and High-Voltage Electrodescitations
- 2022Importance of superstructure in stabilizing oxygen redox in P3- Na0.67Li0.2Mn0.8O2citations
- 2022Importance of superstructure in stabilizing oxygen redox in P3- Na 0.67 Li 0.2 Mn 0.8 O 2citations
- 2021On the Manganese Dissolution Process from LiMn2O4 Cathode Materialscitations
- 2021Vacancy enhanced oxygen redox reversibility in P3-type magnesium doped sodium manganese oxide Na0.67Mg0.2Mn0.8O2citations
- 2021Prospects for Improved Magnesocene-Based Magnesium Battery Electrolytescitations
- 2021Importance of superstructure in stabilizing oxygen redox in P3- Na0.67Li0.2Mn0.8O2citations
- 2020Vacancy enhanced oxygen redox reversibility in P3-type magnesium doped sodium manganese oxide Na 0.67 Mg 0.2 Mn 0.8 O 2citations
- 2020Vacancy enhanced oxygen redox reversibility in P3-type magnesium doped sodium manganese oxide Na0.67Mg0.2Mn0.8O2citations
- 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
- 2020How Mn/Ni Ordering Controls Electrochemical Performance in High-Voltage Spinel LiNi 0.44 Mn 1.56 O 4 with Fixed Oxygen Contentcitations
- 2020Acetonitrile‐Based Electrolytes for Rechargeable Zinc Batteriescitations
- 2019Towards room temperature operation of all-solid-state Na-ion batteries through polyester-polycarbonate-based polymer electrolytescitations
- 2017Electrochemical performance and interfacial properties of Li-metal in lithium bis(fluorosulfonyl)imide based electrolytescitations
- 2017Simple and Green Method for Fabricating V2O5·nH2O Nanosheets for Lithium Battery Application
- 2015Plasma properties during magnetron sputtering of lithium phosphorous oxynitride thin filmscitations
- 2015Capillary based Li-air batteries for in situ synchrotron X-ray powder diffraction studiescitations
- 2014Ionic conductivity and the formation of cubic CaH 2 in the LiBH 4 -Ca(BH 4 ) 2 compositecitations
- 2014Ionic conductivity and the formation of cubic CaH2 in the LiBH4-Ca(BH4)2 compositecitations
- 2014In Situ Synchrotron XRD on a Capillary Li-O2 Battery Cell
Places of action
| Organizations | Location | People |
|---|
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>