Hashem, A. M. ; Abuzeid, H. M. ; Mikhailova, D. ; Ehrenberg, H. ; Mauger, A. ; Julien, C. M. (2012)
Structural and electrochemical properties of α-MnO2 doped with cobalt.
In: Journal of Materials Science, 47 (5)
doi: 10.1007/s10853-011-6071-x
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
In this study, co-doped and undoped MnO2 samples were prepared by redox reaction in acidic medium. X-ray diffraction patterns of pure and doped samples revealed that they crystallized in the α-form with a (2 × 2) tunnel structure. Chemical analysis indicated an increase in the concentration of K+ cations upon Co doping resulting in higher thermal stability. Magnetic properties show the coexistence of Mn4+ and Mn3+ valence states, with reduced amount of Mn3+ ions after the doping process. Co-doped MnO2 has better rechargeability and capacity retention than pure α-MnO2, but the reduction of the capacity fading occurs at the expense of the initial capacity.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2012 |
| Autor(en): | Hashem, A. M. ; Abuzeid, H. M. ; Mikhailova, D. ; Ehrenberg, H. ; Mauger, A. ; Julien, C. M. |
| Art des Eintrags: | Bibliographie |
| Titel: | Structural and electrochemical properties of α-MnO2 doped with cobalt |
| Sprache: | Englisch |
| Publikationsjahr: | März 2012 |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of Materials Science |
| Jahrgang/Volume einer Zeitschrift: | 47 |
| (Heft-)Nummer: | 5 |
| DOI: | 10.1007/s10853-011-6071-x |
| Kurzbeschreibung (Abstract): | In this study, co-doped and undoped MnO2 samples were prepared by redox reaction in acidic medium. X-ray diffraction patterns of pure and doped samples revealed that they crystallized in the α-form with a (2 × 2) tunnel structure. Chemical analysis indicated an increase in the concentration of K+ cations upon Co doping resulting in higher thermal stability. Magnetic properties show the coexistence of Mn4+ and Mn3+ valence states, with reduced amount of Mn3+ ions after the doping process. Co-doped MnO2 has better rechargeability and capacity retention than pure α-MnO2, but the reduction of the capacity fading occurs at the expense of the initial capacity. |
| Zusätzliche Informationen: | SFB 595 B4 |
| Fachbereich(e)/-gebiet(e): | DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche > SFB 595: Elektrische Ermüdung > B - Charakterisierung > Teilprojekt B4: In situ Untersuchungen der Degradation von Interkalationsbatterien und deren Modellierung DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche > SFB 595: Elektrische Ermüdung > B - Charakterisierung DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche > SFB 595: Elektrische Ermüdung Zentrale Einrichtungen DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche DFG-Sonderforschungsbereiche (inkl. Transregio) |
| Hinterlegungsdatum: | 29 Feb 2012 14:27 |
| Letzte Änderung: | 05 Mär 2013 09:59 |
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