Please use this identifier to cite or link to this item:
https://doi.org/10.1016/j.mseb.2011.09.015
DC Field | Value | |
---|---|---|
dc.title | Preparation and mobile ion transport studies of Ta and Nb doped Li 6Zr2O7 Li-fast ion conductors | |
dc.contributor.author | Rao, R.P. | |
dc.contributor.author | Reddy, M.V. | |
dc.contributor.author | Adams, S. | |
dc.contributor.author | Chowdari, B.V.R. | |
dc.date.accessioned | 2014-10-07T09:53:21Z | |
dc.date.available | 2014-10-07T09:53:21Z | |
dc.date.issued | 2012-01-25 | |
dc.identifier.citation | Rao, R.P., Reddy, M.V., Adams, S., Chowdari, B.V.R. (2012-01-25). Preparation and mobile ion transport studies of Ta and Nb doped Li 6Zr2O7 Li-fast ion conductors. Materials Science and Engineering B: Solid-State Materials for Advanced Technology 177 (1) : 100-105. ScholarBank@NUS Repository. https://doi.org/10.1016/j.mseb.2011.09.015 | |
dc.identifier.issn | 09215107 | |
dc.identifier.uri | http://scholarbank.nus.edu.sg/handle/10635/86663 | |
dc.description.abstract | Pure and doped Li6-x(Zr2-xMx)O 7, M = Nb and Ta; x = 0, 0.15 compounds have been prepared by the urea combustion method followed by annealing at 950 °C for 8 h. The samples are characterized by X-ray diffraction and impedance spectroscopy. Ionic conductivities, σionic, were determined in the temperature range of 60-360 °C by impedance spectroscopy. We observe that the Ta doped Li6Zr2O7 has a measurable σ ionic at ∼160 °C, and at 300 °C exhibits a conductivity value of 1 × 10-3 S/cm. The temperature dependence of the conductivity in the range 100-360 °C obeys an Arrhenius relation, yielding an activation energy of Ea = 0.95 eV (for M = Ta and x = 0.15). The bond valence approach has been used to visualise Li+ ion migration pathways and the conductivity mechanism in these compounds. The lowest energy pathway is found to extend along the [0 1 2] direction. The Bond valence analysis also indicates a significantly anisotropic Li-ion conductivity in compounds with Li6Zr2O7 type structure, predicting activation energies of 1.1 and 0.9 eV for the low energy pathway in undoped and doped Li6Zr2O7. © 2011 Elsevier B.V. All rights reserved. | |
dc.description.uri | http://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1016/j.mseb.2011.09.015 | |
dc.source | Scopus | |
dc.subject | Bond valence approach | |
dc.subject | Ionic conductivity | |
dc.subject | Molecular dynamics simulations | |
dc.subject | Solid electrolytes | |
dc.type | Article | |
dc.contributor.department | MATERIALS SCIENCE AND ENGINEERING | |
dc.contributor.department | PHYSICS | |
dc.description.doi | 10.1016/j.mseb.2011.09.015 | |
dc.description.sourcetitle | Materials Science and Engineering B: Solid-State Materials for Advanced Technology | |
dc.description.volume | 177 | |
dc.description.issue | 1 | |
dc.description.page | 100-105 | |
dc.description.coden | MSBTE | |
dc.identifier.isiut | 000298775500017 | |
Appears in Collections: | Staff Publications |
Show simple item record
Files in This Item:
There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.