Loho, Christoph ; Djenadic, Ruzica ; Mundt, Paul ; Clemens, Oliver ; Hahn, Horst (2017)
On processing-structure-property relations and high ionic conductivity in garnet-type Li 5 La 3 Ta 2 O 12 solid electrolyte thin films grown by CO 2 -laser assisted CVD.
In: Solid State Ionics, 313
doi: 10.1016/j.ssi.2017.11.005
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
This study reports on the optimization of garnet-type Li-ion conducting Li5La3Ta2O12 (LLTaO) solid electrolyte thin film growth by CO2-laser assisted chemical vapor deposition (LA-CVD) and the films' detailed structural as well as electrochemical characterization. By adapting the LA-CVD process parameters, high quality LLTaO films with tailored microstructures are successfully grown, which allows to correlate the films' microstructure and phase composition with their electrochemical performance. Explicitly, the influence of grain boundaries on the ionic conductivity is studied, and possible strategies to lower the grain boundary resistance are given. As deposited LLTaO films show a total ionic conductivity of 7.8·10− 6 S·cm− 1 at 298 K (activation energy of 0.66 eV). By applying a post-annealing treatment the total ionic conductivity is improved up to 3.8·10− 5 S·cm− 1 at 298 K (activation energy of 0.52 eV). This is among the highest ionic conductivities reported for Li-ion conducting garnet-type thin films so far. A better suitability of garnet-type Li5La3Ta2O12 films for fundamental research as well as for application in all-solid-state thin film lithium ion batteries compared to commonly investigated Li7La3Zr2O12 films is proposed and discussed.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2017 |
| Autor(en): | Loho, Christoph ; Djenadic, Ruzica ; Mundt, Paul ; Clemens, Oliver ; Hahn, Horst |
| Art des Eintrags: | Bibliographie |
| Titel: | On processing-structure-property relations and high ionic conductivity in garnet-type Li 5 La 3 Ta 2 O 12 solid electrolyte thin films grown by CO 2 -laser assisted CVD |
| Sprache: | Englisch |
| Publikationsjahr: | 15 Dezember 2017 |
| Verlag: | Elsevier Science Publishing |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Solid State Ionics |
| Jahrgang/Volume einer Zeitschrift: | 313 |
| DOI: | 10.1016/j.ssi.2017.11.005 |
| URL / URN: | https://doi.org/10.1016/j.ssi.2017.11.005 |
| Kurzbeschreibung (Abstract): | This study reports on the optimization of garnet-type Li-ion conducting Li5La3Ta2O12 (LLTaO) solid electrolyte thin film growth by CO2-laser assisted chemical vapor deposition (LA-CVD) and the films' detailed structural as well as electrochemical characterization. By adapting the LA-CVD process parameters, high quality LLTaO films with tailored microstructures are successfully grown, which allows to correlate the films' microstructure and phase composition with their electrochemical performance. Explicitly, the influence of grain boundaries on the ionic conductivity is studied, and possible strategies to lower the grain boundary resistance are given. As deposited LLTaO films show a total ionic conductivity of 7.8·10− 6 S·cm− 1 at 298 K (activation energy of 0.66 eV). By applying a post-annealing treatment the total ionic conductivity is improved up to 3.8·10− 5 S·cm− 1 at 298 K (activation energy of 0.52 eV). This is among the highest ionic conductivities reported for Li-ion conducting garnet-type thin films so far. A better suitability of garnet-type Li5La3Ta2O12 films for fundamental research as well as for application in all-solid-state thin film lithium ion batteries compared to commonly investigated Li7La3Zr2O12 films is proposed and discussed. |
| Freie Schlagworte: | Garnet-type Li5La3Ta2O12, Thin film, Solid electrolyte, Ionic conductivity, All-solid-state lithium ion battery, Chemical vapor deposition |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Elektronische Materialeigenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Materialdesign durch Synthese 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Gemeinschaftslabor Nanomaterialien |
| Hinterlegungsdatum: | 12 Dez 2018 09:15 |
| Letzte Änderung: | 12 Dez 2018 09:15 |
| PPN: | |
| Sponsoren: | The authors gratefully acknowledge a major equipment grant “Competence South – Electrochemistry for Electromobility” from the Federal Ministry of Education and Research (contract no. 6091/89161/03KP801)., Further support for an equipment grant by the State of Hesse is appreciated., CL, RD and HH acknowledge the financial support by the Portfolio project “Electrochemical storage in systems” provided by Helmholtz Association., OC gratefully acknowledges support from the German Research Foundation within an Emmy Noether Research Fellowship (grant no. CL551/2-1). |
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