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Nanosized silver-coated and doped manganese dioxide for rechargeable lithium batteries

Abuzeid, Hanaa M. ; Hashem, Ahmed M. ; Narayanan, N. ; Ehrenberg, Helmut ; Julien, C. M. :
Nanosized silver-coated and doped manganese dioxide for rechargeable lithium batteries.
[Online-Edition: http://dx.doi.org/10.1016/j.ssi.2010.11.023]
In: Solid State Ionics, 182 (1) pp. 108-115. ISSN 01672738
[Artikel], (2011)
Note:

SFB 595 B4

Offizielle URL: http://dx.doi.org/10.1016/j.ssi.2010.11.023

Kurzbeschreibung (Abstract)

Nanosized pure, Ag-coated and doped manganese dioxides (MDO) were prepared through a redox reaction between KMnO4 and fumaric acid. XRD analysis showed cryptomelane crystal structure for pure, coated and doped α-phases. Chemical analysis detected the presence of silver in doped and coated MDO. Scanning electron microscope (SEM) and energy-dispersive spectroscopy (EDS) analyses confirmed the presence of silver in doped and coated oxides. Transmission electron microscope (TEM) images confirmed the nanosized particles of the prepared oxides. Magnetic measurements showed reduction in Mn3+ ions in the crystal structure after coating and doping with silver. The electrochemical performance showed that Ag-coated and doped MnO2 samples have better initial capacities than pristine MnO2. Ag-coated MnO2 material showed the best capacity retention upon cycling among all prepared MnO2 oxides, i.e. 140 mAh/g after the 40th cycle at C/5 rate in the potential window 1.5–4.0 V vs. Li/Li+.

Typ des Eintrags: Artikel
Erschienen: 2011
Autor(en): Abuzeid, Hanaa M. ; Hashem, Ahmed M. ; Narayanan, N. ; Ehrenberg, Helmut ; Julien, C. M.
Titel: Nanosized silver-coated and doped manganese dioxide for rechargeable lithium batteries
Sprache: Englisch
Kurzbeschreibung (Abstract):

Nanosized pure, Ag-coated and doped manganese dioxides (MDO) were prepared through a redox reaction between KMnO4 and fumaric acid. XRD analysis showed cryptomelane crystal structure for pure, coated and doped α-phases. Chemical analysis detected the presence of silver in doped and coated MDO. Scanning electron microscope (SEM) and energy-dispersive spectroscopy (EDS) analyses confirmed the presence of silver in doped and coated oxides. Transmission electron microscope (TEM) images confirmed the nanosized particles of the prepared oxides. Magnetic measurements showed reduction in Mn3+ ions in the crystal structure after coating and doping with silver. The electrochemical performance showed that Ag-coated and doped MnO2 samples have better initial capacities than pristine MnO2. Ag-coated MnO2 material showed the best capacity retention upon cycling among all prepared MnO2 oxides, i.e. 140 mAh/g after the 40th cycle at C/5 rate in the potential window 1.5–4.0 V vs. Li/Li+.

Titel der Zeitschrift, Zeitung oder Schriftenreihe: Solid State Ionics
Band: 182
(Heft-)Nummer: 1
Freie Schlagworte: MnO2; Ag; Cathode; Lithium batteries
Fachbereich(e)/-gebiet(e): Zentrale Einrichtungen > Sonderforschungsbereich 595 > B - Charakterisierung > B4
Zentrale Einrichtungen > Sonderforschungsbereich 595 > B - Charakterisierung
Zentrale Einrichtungen > Sonderforschungsbereich 595
Zentrale Einrichtungen
Hinterlegungsdatum: 15 Sep 2011 14:16
Offizielle URL: http://dx.doi.org/10.1016/j.ssi.2010.11.023
Zusätzliche Informationen:

SFB 595 B4

ID-Nummer: 10.1016/j.ssi.2010.11.023
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