| Autor: |
Christoph, Dräger, Florian, Sigel, Ralf, Witte, Robert, Kruk, Lukas, Pfaffmann, Stefan, Mangold, Valeriu, Mereacre, Michael, Knapp, Helmut, Ehrenberg, Sylvio, Indris |
| Rok vydání: |
2018 |
| Zdroj: |
Physical chemistry chemical physics : PCCP. 21(1) |
| ISSN: |
1463-9084 |
| Popis: |
LiCo0.8Fe0.2MnO4 has been investigated as an active material for the positive electrode in lithium-ion batteries (LIBs) with a discharge potential of around 5 V (vs. Li+|Li). After synthesis by a Pechini based sol-gel route, the structural and morphological properties have been investigated by X-ray diffraction, scanning electron microscopy, 7Li MAS NMR spectroscopy, and 57Fe Mössbauer spectroscopy. With galvanostatic cycling, it was possible to obtain a specific discharge capacity of 117 mA h g-1, which is more than 80% of the theoretical capacity. The lithium extraction/insertion mechanism has been characterized by in situ synchrotron powder diffraction. The reversible oxidation process of Fe3+ to Fe4+ has been observed by in situ Mössbauer spectroscopy and in situ XAS measurements. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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