Dolotko, O. ; Senyshyn, Anatoliy ; Mühlbauer, M. J. ; Nikolowski, Kristian ; Ehrenberg, Helmut (2014)
Understanding structural changes in NMC Li-ion cells by in situ neutron diffraction.
In: Journal of Power Sources, 255
doi: 10.1016/j.jpowsour.2014.01.010
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Commercial NMC cells of 18650-type based on a Lix(Ni0.5Mn0.3Co0.2)O2 cathode and a graphitic anode were studied in situ using a combination of high-resolution monochromatic neutron powder diffraction and electrochemical analysis. The structural changes of the electrode materials during cell charge/discharge have been determined using Rietveld refinement and single profile decomposition techniques. A transformation of the graphitic anode to LiC12 and LiC6 through the formation of higher ordered lithium intercalated carbons was observed. A different behavior of electrochemically-driven lattice distortion was observed for NMC material in comparison to LixCoO2 and its influence on the overall cell performance has been discussed in brief. Detailed analysis of the structural changes in the Lix(Ni0.5Mn0.3Co0.2)O2 cathode material revealed reversible Li/Ni cation mixing (5.6(8)%), which is state-of-charge independent below 1600 mAh and vanishing above 1800 mAh (∼0.8Qmax).
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2014 |
| Autor(en): | Dolotko, O. ; Senyshyn, Anatoliy ; Mühlbauer, M. J. ; Nikolowski, Kristian ; Ehrenberg, Helmut |
| Art des Eintrags: | Bibliographie |
| Titel: | Understanding structural changes in NMC Li-ion cells by in situ neutron diffraction |
| Sprache: | Englisch |
| Publikationsjahr: | 1 Juni 2014 |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of Power Sources |
| Jahrgang/Volume einer Zeitschrift: | 255 |
| DOI: | 10.1016/j.jpowsour.2014.01.010 |
| Kurzbeschreibung (Abstract): | Commercial NMC cells of 18650-type based on a Lix(Ni0.5Mn0.3Co0.2)O2 cathode and a graphitic anode were studied in situ using a combination of high-resolution monochromatic neutron powder diffraction and electrochemical analysis. The structural changes of the electrode materials during cell charge/discharge have been determined using Rietveld refinement and single profile decomposition techniques. A transformation of the graphitic anode to LiC12 and LiC6 through the formation of higher ordered lithium intercalated carbons was observed. A different behavior of electrochemically-driven lattice distortion was observed for NMC material in comparison to LixCoO2 and its influence on the overall cell performance has been discussed in brief. Detailed analysis of the structural changes in the Lix(Ni0.5Mn0.3Co0.2)O2 cathode material revealed reversible Li/Ni cation mixing (5.6(8)%), which is state-of-charge independent below 1600 mAh and vanishing above 1800 mAh (∼0.8Qmax). |
| Freie Schlagworte: | Li-ion; NMC cell; In situ study; Electrodes; Neutron powder diffraction |
| Zusätzliche Informationen: | SFB 595 T2 |
| Fachbereich(e)/-gebiet(e): | Zentrale Einrichtungen DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche > SFB 595: Elektrische Ermüdung DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche > SFB 595: Elektrische Ermüdung > T - Transferprojekte 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 DFG-Sonderforschungsbereiche (inkl. Transregio) |
| Hinterlegungsdatum: | 28 Apr 2014 09:40 |
| Letzte Änderung: | 25 Aug 2014 08:25 |
| PPN: | |
| Sponsoren: | This work is financially supported by the Deutsche Forschungsgemeinschaft DFG as part of the Research Collaborative Centre 595 “Electrical fatigue in functional materials”. The authors thank to Andrea Voss (Institute for Complex Materials, IFW Dresden) fo |
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