Howard, M. A. ; Clemens, O. ; Parvathy, A. S. ; Anderson, P. A. ; Slater, P. R. (2016)
Synthesis and ionic conductivity of new high Li ion content garnets, LnSr2Ta2Li7O12 (Ln = La, Pr, Nd, Sm, Gd).
In: Journal of Alloys and Compounds, 670
doi: 10.1016/j.jallcom.2016.02.012
Article, Bibliographie
Abstract
In this paper we report the synthesis and Li ion conductivity of the new high Li content garnet phases LnSr2Ta2Li7O12 (Ln = La, Pr, Nd, Sm or Gd). Close inspection of the X-ray diffraction patterns indicate that these systems are mostly composed of the ordered tetragonal garnet phase, along with a small amount of cubic garnet. The presence of a small amount of cubic garnet phase can most likely be correlated with partial Li loss on synthesis as well as some degree of H+/Li+ exchange. The latter was supported by results from variable temperature X-ray diffraction studies and thermogravimetric analysis. The adoption of the tetragonal garnet structure by these new systems highlights further that in order to accommodate 7 Lithium ions within the garnet structure, then cation ordering must occur to prevent short Li–Li interactions. In line with other tetragonal garnet systems, the Li ion conductivity is shown to be low, as a result of this ordered Li distribution.
| Item Type: | Article |
|---|---|
| Erschienen: | 2016 |
| Creators: | Howard, M. A. ; Clemens, O. ; Parvathy, A. S. ; Anderson, P. A. ; Slater, P. R. |
| Type of entry: | Bibliographie |
| Title: | Synthesis and ionic conductivity of new high Li ion content garnets, LnSr2Ta2Li7O12 (Ln = La, Pr, Nd, Sm, Gd) |
| Language: | English |
| Date: | 15 June 2016 |
| Publisher: | Elsevier |
| Journal or Publication Title: | Journal of Alloys and Compounds |
| Volume of the journal: | 670 |
| DOI: | 10.1016/j.jallcom.2016.02.012 |
| URL / URN: | https://doi.org/10.1016/j.jallcom.2016.02.012 |
| Abstract: | In this paper we report the synthesis and Li ion conductivity of the new high Li content garnet phases LnSr2Ta2Li7O12 (Ln = La, Pr, Nd, Sm or Gd). Close inspection of the X-ray diffraction patterns indicate that these systems are mostly composed of the ordered tetragonal garnet phase, along with a small amount of cubic garnet. The presence of a small amount of cubic garnet phase can most likely be correlated with partial Li loss on synthesis as well as some degree of H+/Li+ exchange. The latter was supported by results from variable temperature X-ray diffraction studies and thermogravimetric analysis. The adoption of the tetragonal garnet structure by these new systems highlights further that in order to accommodate 7 Lithium ions within the garnet structure, then cation ordering must occur to prevent short Li–Li interactions. In line with other tetragonal garnet systems, the Li ion conductivity is shown to be low, as a result of this ordered Li distribution. |
| Uncontrolled Keywords: | Inorganic materials, Oxide materials, Ionic conduction, X-ray diffraction |
| Divisions: | 11 Department of Materials and Earth Sciences 11 Department of Materials and Earth Sciences > Material Science 11 Department of Materials and Earth Sciences > Material Science > Fachgebiet Materialdesign durch Synthese 11 Department of Materials and Earth Sciences > Material Science > Joint Research Laboratory Nanomaterials |
| Date Deposited: | 22 Mar 2017 11:49 |
| Last Modified: | 29 Jan 2019 07:52 |
| PPN: | |
| Funders: | We would like to thank EPSRC and the University of Birmingham for the financial support (M. Howard studentship)., The Bruker D8 diffractometer used in the RT PXRD studies and the Netzsch STA 449 F1 Jupiter Thermal Analyser, used in this research were obtained through Science City Advanced Materials project;, Creating and Characterising Next generation Advanced Materials project, with support from Advantage West Midlands (AWM) and part funded by the European regional Development Fund. |
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