Schweikert, Nina ; Heinzmann, Ralf ; Eichhöfer, Andreas ; Hahn, Horst ; Indris, Sylvio (2012)
Electrochemical impedance spectroscopy of Li4Ti5O12 and LiCoO2 based half-cells and Li4Ti5O12/LiCoO2 cells: Internal interfaces and influence of state-of-charge and cycle number.
In: Solid State Ionics, 226
doi: 10.1016/j.ssi.2012.08.002
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
We studied Li/Li4Ti5O12 and Li/LiCoO2 half-cells as well as Li4Ti5O12/LiCoO2 coin-type battery cells at different state-of-charge over several cycles by means of electrochemical impedance spectroscopy. A simple equivalent-circuit model has been applied to probe changes at the internal interfaces of these batteries. The parameters of this model are used to follow the state-of-charge and state-of-health of the cells. Moreover plain empirical relations were introduced to accurately delineate those courses.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2012 |
| Autor(en): | Schweikert, Nina ; Heinzmann, Ralf ; Eichhöfer, Andreas ; Hahn, Horst ; Indris, Sylvio |
| Art des Eintrags: | Bibliographie |
| Titel: | Electrochemical impedance spectroscopy of Li4Ti5O12 and LiCoO2 based half-cells and Li4Ti5O12/LiCoO2 cells: Internal interfaces and influence of state-of-charge and cycle number |
| Sprache: | Englisch |
| Publikationsjahr: | 15 Oktober 2012 |
| Verlag: | Elsevier Science Publishing |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Solid State Ionics |
| Jahrgang/Volume einer Zeitschrift: | 226 |
| DOI: | 10.1016/j.ssi.2012.08.002 |
| Kurzbeschreibung (Abstract): | We studied Li/Li4Ti5O12 and Li/LiCoO2 half-cells as well as Li4Ti5O12/LiCoO2 coin-type battery cells at different state-of-charge over several cycles by means of electrochemical impedance spectroscopy. A simple equivalent-circuit model has been applied to probe changes at the internal interfaces of these batteries. The parameters of this model are used to follow the state-of-charge and state-of-health of the cells. Moreover plain empirical relations were introduced to accurately delineate those courses. |
| Freie Schlagworte: | Lithium-ion batteries, Electrochemical impedance spectroscopy, State-of-charge, State-of-health |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Gemeinschaftslabor Nanomaterialien 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften |
| Hinterlegungsdatum: | 17 Jun 2014 11:28 |
| Letzte Änderung: | 17 Jun 2014 11:28 |
| PPN: | |
| Sponsoren: | We are grateful to the German Federal Ministry of Education and Research for financial support. |
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