Nowroozi, Mohammad Ali ; Clemens, Oliver (2018)
Insights on the Behavior of Conversion-Based Anode Materials for Fluoride Ion Batteries by Testing against an Intercalation-Based Reference Cathode.
In: ACS Applied Energy Materials, 1 (11)
doi: 10.1021/acsaem.8b01630
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
La2CoO4 has been introduced as a promising intercalation-based cathode material for all-solid-state reversible fluoride ion batteries (ASS-FIBs). However, the cycling behavior of cells using La2CoO4 as the cathode material and conversion-based metal/metal fluoride composites as the anode material is still not comparable with the current state of the art of the functional lithium ion batteries. A great part of this capacity fading could originate from the conversion-based anode systems, for which there is a lack of understanding of the fundamental conversion mechanism within an ASS-FIB. In this work, we have focused on investigating different anode composite candidates M-MF2 (X = Pb, Zn, Mn) in order to improve the understanding of the conversion reaction within FIBs. Studies of the electrochemical charging/discharging behaviors and cycling stabilities were combined with impedance spectroscopy analysis and ex-situ X-ray diffraction for the various anode composites against La2CoO4. Furthermore, symmetrical cells made only of the anode composites were examined. By this, the strong impact of volume changes on the conversion reaction within such ASS batteries could be demonstrated; intrinsic physical properties of the metal fluorides were further found to affect the overpotentials of the cell. From the studies performed, it is concluded that the design of elastic electrode composites, which can maintain interface contacts on volume changes, will be required in the future in order to improve the cycling stability of conversion-based electrode systems within ASS-FIBs.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2018 |
| Autor(en): | Nowroozi, Mohammad Ali ; Clemens, Oliver |
| Art des Eintrags: | Bibliographie |
| Titel: | Insights on the Behavior of Conversion-Based Anode Materials for Fluoride Ion Batteries by Testing against an Intercalation-Based Reference Cathode |
| Sprache: | Englisch |
| Publikationsjahr: | 22 Oktober 2018 |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | ACS Applied Energy Materials |
| Jahrgang/Volume einer Zeitschrift: | 1 |
| (Heft-)Nummer: | 11 |
| DOI: | 10.1021/acsaem.8b01630 |
| URL / URN: | https://doi.org/10.1021/acsaem.8b01630 |
| Kurzbeschreibung (Abstract): | La2CoO4 has been introduced as a promising intercalation-based cathode material for all-solid-state reversible fluoride ion batteries (ASS-FIBs). However, the cycling behavior of cells using La2CoO4 as the cathode material and conversion-based metal/metal fluoride composites as the anode material is still not comparable with the current state of the art of the functional lithium ion batteries. A great part of this capacity fading could originate from the conversion-based anode systems, for which there is a lack of understanding of the fundamental conversion mechanism within an ASS-FIB. In this work, we have focused on investigating different anode composite candidates M-MF2 (X = Pb, Zn, Mn) in order to improve the understanding of the conversion reaction within FIBs. Studies of the electrochemical charging/discharging behaviors and cycling stabilities were combined with impedance spectroscopy analysis and ex-situ X-ray diffraction for the various anode composites against La2CoO4. Furthermore, symmetrical cells made only of the anode composites were examined. By this, the strong impact of volume changes on the conversion reaction within such ASS batteries could be demonstrated; intrinsic physical properties of the metal fluorides were further found to affect the overpotentials of the cell. From the studies performed, it is concluded that the design of elastic electrode composites, which can maintain interface contacts on volume changes, will be required in the future in order to improve the cycling stability of conversion-based electrode systems within ASS-FIBs. |
| Freie Schlagworte: | fluoride ion batteries, conversion electrodes, intercalation electrodes, La2CoO4, cycling behavior, reaction mechanism of batteries |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Materialdesign durch Synthese |
| Hinterlegungsdatum: | 04 Jun 2020 09:10 |
| Letzte Änderung: | 04 Jun 2020 09:10 |
| PPN: | |
| Projekte: | This work was funded by the German Research Foundation within the Emmy Noether program (Grant CL 551/2-1). |
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