Senyshyn, Anatoliy ; Dolotko, O. ; Mühlbauer, M. J. ; Nikolowski, Kristian ; Fuess, Hartmut ; Ehrenberg, Helmut (2013)
Lithium Intercalation into Graphitic Carbons Revisited: Experimental Evidence for Twisted Bilayer Behavior.
In: Journal of the Electrochemical Society, 160 (5)
doi: 10.1149/2.031305jes
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
The crystal structure of the 18650-type Li-ion cell constituents has been studied at ambient temperature by high-resolution neutron powder diffraction at different states of charge. The structure evolution occurring on the anode (graphite) site as a function of the cell state has been accurately monitored by simultaneous electrochemical measurements and powder diffraction. A set of 128 neutron powder diffraction patterns each over a 2θ angular range of 0.95°–160° has been collected during slow cell discharge/charge in a high-resolution mode. Severe deviations from the previously reported details of Li-intercalation into graphite have been observed, such as: structural evolution of the intercalated carbons depending either on charge or discharge; pronounced dependence of the interatomic spacings for the higher ordered LixC6 (incl. previously unknown ones). Instead of higher stages of Li-intercalation in the region of low Li-contents, which would have been observed by Bragg reflections at low 2θ angles, a modulation within the ab-planes is proposed, which is correlated between neighboured graphene layers and changes in dependence of the Li-content. On the basis of these results the phase diagram for lithium-intercalated carbons has been reconsidered and the alternative ordering model for the LixC6 (x < 0.5) has been proposed.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2013 |
| Autor(en): | Senyshyn, Anatoliy ; Dolotko, O. ; Mühlbauer, M. J. ; Nikolowski, Kristian ; Fuess, Hartmut ; Ehrenberg, Helmut |
| Art des Eintrags: | Bibliographie |
| Titel: | Lithium Intercalation into Graphitic Carbons Revisited: Experimental Evidence for Twisted Bilayer Behavior |
| Sprache: | Englisch |
| Publikationsjahr: | 9 Mai 2013 |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of the Electrochemical Society |
| Jahrgang/Volume einer Zeitschrift: | 160 |
| (Heft-)Nummer: | 5 |
| DOI: | 10.1149/2.031305jes |
| Kurzbeschreibung (Abstract): | The crystal structure of the 18650-type Li-ion cell constituents has been studied at ambient temperature by high-resolution neutron powder diffraction at different states of charge. The structure evolution occurring on the anode (graphite) site as a function of the cell state has been accurately monitored by simultaneous electrochemical measurements and powder diffraction. A set of 128 neutron powder diffraction patterns each over a 2θ angular range of 0.95°–160° has been collected during slow cell discharge/charge in a high-resolution mode. Severe deviations from the previously reported details of Li-intercalation into graphite have been observed, such as: structural evolution of the intercalated carbons depending either on charge or discharge; pronounced dependence of the interatomic spacings for the higher ordered LixC6 (incl. previously unknown ones). Instead of higher stages of Li-intercalation in the region of low Li-contents, which would have been observed by Bragg reflections at low 2θ angles, a modulation within the ab-planes is proposed, which is correlated between neighboured graphene layers and changes in dependence of the Li-content. On the basis of these results the phase diagram for lithium-intercalated carbons has been reconsidered and the alternative ordering model for the LixC6 (x < 0.5) has been proposed. |
| Zusätzliche Informationen: | SFB 595 T1 |
| Fachbereich(e)/-gebiet(e): | DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche > SFB 595: Elektrische Ermüdung > T - Transferprojekte > Teilprojekt T1: „in operando“ Untersuchungen der Materialermüdung in kommerziellen Batterie-Typen durch Neutronentomographie und –diffraktion DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche > SFB 595: Elektrische Ermüdung > T - Transferprojekte DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche > SFB 595: Elektrische Ermüdung Zentrale Einrichtungen DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche DFG-Sonderforschungsbereiche (inkl. Transregio) |
| Hinterlegungsdatum: | 13 Mai 2013 08:33 |
| Letzte Änderung: | 13 Mai 2013 08:33 |
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