Riekehr, Lars ; Liu, Jinlong ; Schwarz, Björn ; Sigel, Florian ; Kerkamm, Ingo ; Xia, Yongyao ; Ehrenberg, Helmut (2016)
Effect of pristine nanostructure on first cycle electrochemical characteristics of lithium-rich lithium–nickel–cobalt–manganese-oxide cathode ceramics for lithium ion batteries.
In: Journal of Power Sources, 306
doi: 10.1016/j.jpowsour.2015.11.082
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Structural and electrochemical (EC) data of five different xLi2MnO3:(1-x)Li(Ni1/3Co1/3Mn1/3)O2 cathode ceramics are presented. The aim of this work is to highlight the nano structure of this material class, next to the choice of right composition, as the key to anomalously high discharge capacities > 250 mAhg�1. Therefore, the pristine nano composite structure of five different samples has been analyzed extensively by transition electron microscopy with respect to Li2MnO3 domain size, shape and dispersion. DIFFaX simulations and Rietveld refinements to synchrotron X-Ray diffraction patterns are used to confirm the TEM results with a statistically reliable bulk method. The EC characteristics of the first cycle have been evaluated with respect to an EC active Li2MnO3 component. By comparing the EC features of materials with x ¼ 0.3, x ¼ 0.5 and x ¼ 0.7, it is evident that a composition of x ¼ 0.5 is the most promising. To point out the impact of the pristine nano structure on the EC performance, three samples with x ¼ 0.5 but considerable different nano domain arrangement, are compared. A strong influence has been found, with the highest discharge capacities for nano composites with small and evenly dispersed Li2MnO3 domains. © 2015 Elsevier B.V. All rights reserved.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2016 |
| Autor(en): | Riekehr, Lars ; Liu, Jinlong ; Schwarz, Björn ; Sigel, Florian ; Kerkamm, Ingo ; Xia, Yongyao ; Ehrenberg, Helmut |
| Art des Eintrags: | Bibliographie |
| Titel: | Effect of pristine nanostructure on first cycle electrochemical characteristics of lithium-rich lithium–nickel–cobalt–manganese-oxide cathode ceramics for lithium ion batteries |
| Sprache: | Englisch |
| Publikationsjahr: | 2016 |
| Verlag: | Elsevier B.V. |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of Power Sources |
| Jahrgang/Volume einer Zeitschrift: | 306 |
| DOI: | 10.1016/j.jpowsour.2015.11.082 |
| Kurzbeschreibung (Abstract): | Structural and electrochemical (EC) data of five different xLi2MnO3:(1-x)Li(Ni1/3Co1/3Mn1/3)O2 cathode ceramics are presented. The aim of this work is to highlight the nano structure of this material class, next to the choice of right composition, as the key to anomalously high discharge capacities > 250 mAhg�1. Therefore, the pristine nano composite structure of five different samples has been analyzed extensively by transition electron microscopy with respect to Li2MnO3 domain size, shape and dispersion. DIFFaX simulations and Rietveld refinements to synchrotron X-Ray diffraction patterns are used to confirm the TEM results with a statistically reliable bulk method. The EC characteristics of the first cycle have been evaluated with respect to an EC active Li2MnO3 component. By comparing the EC features of materials with x ¼ 0.3, x ¼ 0.5 and x ¼ 0.7, it is evident that a composition of x ¼ 0.5 is the most promising. To point out the impact of the pristine nano structure on the EC performance, three samples with x ¼ 0.5 but considerable different nano domain arrangement, are compared. A strong influence has been found, with the highest discharge capacities for nano composites with small and evenly dispersed Li2MnO3 domains. © 2015 Elsevier B.V. All rights reserved. |
| Freie Schlagworte: | TEM, Li-rich NCM, Li-ion battery, DIFFaX simulation, Synchrotron XRD |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Erneuerbare Energien 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Strukturforschung 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften |
| Hinterlegungsdatum: | 20 Jun 2016 10:58 |
| Letzte Änderung: | 20 Jun 2016 10:58 |
| PPN: | |
| Sponsoren: | Financial support from the Deutsche Forschungsgemeinschaft DFG within the Reserach Collaborative Centre SFB 595 “Electrical Fatigue in Functional Materials” (transfer project T3) is gratefully acknowledged. |
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