| People | Locations | Statistics |
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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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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
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article
Vacancy enhanced oxygen redox reversibility in P3-type magnesium doped sodium manganese oxide Na0.67Mg0.2Mn0.8O2
Abstract
Lithium-rich layered oxides and sodium layered oxides represent attractive positive electrode materials exhibiting excess capacity delivered by additional oxygen redox activity. However, structural degradation in the bulk and detrimental reactions with the electrolyte on the surface often occur, leading to limited reversibility of oxygen redox processes. Here we present the properties of P3-type Na<sub>0.67</sub>Mg<sub>0.2</sub>Mn<sub>0.8</sub>O<sub>2</sub> synthesized under both air and oxygen. Both materials exhibit stable cycling performance in the voltage range 1.8-3.8 V where the Mn<sup>3+</sup>/Mn<sup>4+</sup> redox couple entirely dominates the electrochemical reaction. Oxygen redox activity is triggered for both compounds in the wider voltage window 1.8-4.3 V with typical large voltage hysteresis from non-bonding O 2p states generated by substituted Mg. Interestingly, for the compound prepared under oxygen, an additional reversible oxygen redox activity is shown with exceptionally small voltage hysteresis (20 mV). The presence of vacancies in the transition metal layers is shown to play a critical role not only in forming unpaired O 2p states independent of substituted elements but also in stabilising the P3 structure during charge with reduced structural transformation to the O’3 phase at the end of discharge. This study reveals the important role of vacancies in P3-type sodium layered oxides to increase energy density using both cationic and anionic redox processes.