| 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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Johnsen, Rune E.
Technical University of Denmark
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (15/15 displayed)
- 2020Role of the metal cation in the dehydration of the microporous metal–organic frameworks CPO-27-Mcitations
- 2019Improved cycling stability in high-capacity Li-rich vanadium containing disordered rock salt oxyfluoride cathodescitations
- 2019Structure-performance relationships on Co based Fischer – Tropsch synthesis catalysts: The more defect free the bettercitations
- 2019Structure-performance relationships on Co based Fischer – Tropsch synthesis catalysts: The more defect free the bettercitations
- 2018Intercalation of lithium into disordered graphite in a working batterycitations
- 2016In situ X-ray powder diffraction studies of the synthesis of graphene oxide and formation of reduced graphene oxidecitations
- 2015In Situ Studies of Fe4+ Stability in β-Li3Fe2(PO4)3 Cathodes for Li Ion Batteriescitations
- 2015Capillary based Li-air batteries for in situ synchrotron X-ray powder diffraction studiescitations
- 2014In Situ Synchrotron XRD on a Capillary Li-O2 Battery Cell
- 2014Temperature- and Pressure-Induced Changes in the Crystal Structure of Sr(NH3)8Cl2citations
- 2013Capillary-based micro-battery cell for in situ X-ray powder diffraction studies of working batteries: a study of the initial intercalation and deintercalation of lithium into graphitecitations
- 2013A combined in situ XAS-XRPD-Raman study of Fischer-Tropsch synthesis over a carbon supported Co catalystcitations
- 2012The iron member of the CPO-27 coordination polymer series: Synthesis, characterization, and intriguing redox propertiescitations
- 2010Structural and microstructural changes during anion exchange of CoAl layered double hydroxides: an in situ X-ray powder diffraction studycitations
- 2009A Structural Study of Stacking Disorder in the Decomposition Oxide of MgAl Layered Double Hydroxide: A DIFFaX plus Analysiscitations
Places of action
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article
In Situ Studies of Fe4+ Stability in β-Li3Fe2(PO4)3 Cathodes for Li Ion Batteries
Abstract
In commercial Fe-based batteries the Fe2+/Fe3+ oxidation states are used, however by also utilizing the Fe4+ oxidation state, intercalation of up to two Li ions per Fe ion could be possible. In this study, we investigate whether Fe4+ can be formed and stabilized in β-Li3Fe2(PO4)3. The work includes in situ synchrotron X-ray powder diffraction studies (XRPD) during charging of β-Li3Fe2(PO4)3 up to 5.0 V vs. Li/Li+. A novel capillary-based micro battery cell for in situ XRPD has been designed for this. During charge, a plateau at 4.5 V was found and a small contraction in volume was observed, indicating some Li ion extraction. The volume change of the rhombohedral unit cell is anisotropic, with a decrease in the a parameter and an increase in the c parameter during the Li ion extraction. Unfortunately, no increased discharge capacity was observed and Mössbauer spectroscopy showed no evidence of Fe4+ formation. Oxidation of the organic electrolyte is inevitable at 4.5 V but this alone cannot explain the volume change. Instead, a reversible oxygen redox process (O2− → O−) could possibly explain and charge compensate for the reversible extraction of lithium ions from β-Li3Fe2(PO4)3.