Wei, Y. J. ; Ehrenberg, Helmut ; Bramnik, Natalia N. ; Nikolowski, Kristian ; Baehtz, Carsten ; Fuess, Hartmut (2007)
In situ synchrotron diffraction study of high temperature prepared orthorhombic LiMnO2.
In: Solid State Ionics, 178 (3-4)
doi: 10.1016/j.ssi.2006.11.018
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
HT-LiMnO2 was prepared by a solid-state reaction at 900 °C. Electrochemical charge–discharge cycling of HT-LiMnO2 showed an initial charge capacity 113 mA h g− 1, followed by a small first discharge of 25 mA h g− 1. The discharge capacity subsequently increased and reached up to not, vert, similar 120 mA h g− 1 after 30 cycles. In situ synchrotron diffraction showed that HT-LiMnO2 transformed to a new phase (Phase II) during the first charge process, which was metastable and could easily convert to spinel LiMn2O4 in the following cycles. The progressive formation of this spinel phase was responsible for the capacity increase of the battery in the first cycles. The different cycling performance of HT-LiMnO2 and LT-LiMnO2 was attributed to the large stacking faults in LT-LiMnO2, which may facilitate the material to completely convert to spinel LiMn2O4 in the first charge without the medium transition to Phase II.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2007 |
| Autor(en): | Wei, Y. J. ; Ehrenberg, Helmut ; Bramnik, Natalia N. ; Nikolowski, Kristian ; Baehtz, Carsten ; Fuess, Hartmut |
| Art des Eintrags: | Bibliographie |
| Titel: | In situ synchrotron diffraction study of high temperature prepared orthorhombic LiMnO2 |
| Sprache: | Englisch |
| Publikationsjahr: | Februar 2007 |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Solid State Ionics |
| Jahrgang/Volume einer Zeitschrift: | 178 |
| (Heft-)Nummer: | 3-4 |
| DOI: | 10.1016/j.ssi.2006.11.018 |
| Kurzbeschreibung (Abstract): | HT-LiMnO2 was prepared by a solid-state reaction at 900 °C. Electrochemical charge–discharge cycling of HT-LiMnO2 showed an initial charge capacity 113 mA h g− 1, followed by a small first discharge of 25 mA h g− 1. The discharge capacity subsequently increased and reached up to not, vert, similar 120 mA h g− 1 after 30 cycles. In situ synchrotron diffraction showed that HT-LiMnO2 transformed to a new phase (Phase II) during the first charge process, which was metastable and could easily convert to spinel LiMn2O4 in the following cycles. The progressive formation of this spinel phase was responsible for the capacity increase of the battery in the first cycles. The different cycling performance of HT-LiMnO2 and LT-LiMnO2 was attributed to the large stacking faults in LT-LiMnO2, which may facilitate the material to completely convert to spinel LiMn2O4 in the first charge without the medium transition to Phase II. |
| Freie Schlagworte: | Orthorhombic LiMnO2; Lithium ion battery; Structural properties; In situ diffraction; Electrochemical properties |
| Zusätzliche Informationen: | SFB 595 Cooperation B3, B4 |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften DFG-Sonderforschungsbereiche (inkl. Transregio) DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche Zentrale Einrichtungen DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche > SFB 595: Elektrische Ermüdung DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche > SFB 595: Elektrische Ermüdung > B - Charakterisierung DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche > SFB 595: Elektrische Ermüdung > B - Charakterisierung > Teilprojekt B3: Strukturelle Untersuchungen zur Aufklärung der elektrischen Ermüdung in PZT DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche > SFB 595: Elektrische Ermüdung > B - Charakterisierung > Teilprojekt B4: In situ Untersuchungen der Degradation von Interkalationsbatterien und deren Modellierung |
| Hinterlegungsdatum: | 10 Aug 2011 11:42 |
| Letzte Änderung: | 21 Mär 2019 07:21 |
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