Fingerle, Mathias ; Loho, Christoph ; Ferber, Thimo ; Hahn, Horst ; Hausbrand, René (2017)
Evidence of the chemical stability of the garnet-type solid electrolyte Li 5 La 3 Ta 2 O 12 towards lithium by a surface science approach.
In: Journal of Power Sources, 366
doi: 10.1016/j.jpowsour.2017.08.109
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
The chemical stability between Li metal and garnet-type solid electrolytes is currently under debate, mainly catalyzed by theoretical studies. Here, we investigate the stability of Li5La3Ta2O12 (LLTaO) towards lithium experimentally. Using a surface science approach, lithium is stepwise evaporated on an LLTaO thin film grown by CO2-laser assisted chemical vapor deposition. By annealing of the LLTaO thin film, the Li2CO3 surface layer can be removed, leaving only small traces of Li2CO3, Li2O2 and Li2O behind. The interface formation of LLTaO towards lithium is then monitored by means of X-ray and ultraviolet photoelectron spectroscopy. Neither reaction products related to decomposition nor structural changes in the matrix of the Ta-based garnet-type solid-electrolyte can be detected, indicating that LLTaO exhibits chemical stability under equilibrium conditions. Furthermore, a model for the energy level alignment at the LLTaO/Li interface is discussed.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2017 |
| Autor(en): | Fingerle, Mathias ; Loho, Christoph ; Ferber, Thimo ; Hahn, Horst ; Hausbrand, René |
| Art des Eintrags: | Bibliographie |
| Titel: | Evidence of the chemical stability of the garnet-type solid electrolyte Li 5 La 3 Ta 2 O 12 towards lithium by a surface science approach |
| Sprache: | Englisch |
| Publikationsjahr: | 31 Oktober 2017 |
| Verlag: | Elsevier Science Publishing |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of Power Sources |
| Jahrgang/Volume einer Zeitschrift: | 366 |
| DOI: | 10.1016/j.jpowsour.2017.08.109 |
| URL / URN: | https://doi.org/10.1016/j.jpowsour.2017.08.109 |
| Kurzbeschreibung (Abstract): | The chemical stability between Li metal and garnet-type solid electrolytes is currently under debate, mainly catalyzed by theoretical studies. Here, we investigate the stability of Li5La3Ta2O12 (LLTaO) towards lithium experimentally. Using a surface science approach, lithium is stepwise evaporated on an LLTaO thin film grown by CO2-laser assisted chemical vapor deposition. By annealing of the LLTaO thin film, the Li2CO3 surface layer can be removed, leaving only small traces of Li2CO3, Li2O2 and Li2O behind. The interface formation of LLTaO towards lithium is then monitored by means of X-ray and ultraviolet photoelectron spectroscopy. Neither reaction products related to decomposition nor structural changes in the matrix of the Ta-based garnet-type solid-electrolyte can be detected, indicating that LLTaO exhibits chemical stability under equilibrium conditions. Furthermore, a model for the energy level alignment at the LLTaO/Li interface is discussed. |
| Freie Schlagworte: | Garnet-type solid electrolyte, Photoelectron spectroscopy, CO2-laser assisted chemical vapor deposition, Interface stability, Electrolyte-electrode interface, All-solid-state battery |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Gemeinschaftslabor Nanomaterialien 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Oberflächenforschung |
| Hinterlegungsdatum: | 27 Sep 2017 08:11 |
| Letzte Änderung: | 26 Jun 2018 11:41 |
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