Johnson, ID;
Ashton, TE;
Blagovidova, E;
Smales, GJ;
Lübke, M;
Baker, PJ;
Corr, SA;
(2018)
Mechanistic insights of Li+ diffusion within doped LiFePO4 from Muon Spectroscopy.
Scientific Reports
, 8
, Article 4114. 10.1038/s41598-018-22435-1.
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Abstract
The Li+ion diffusion characteristics of V- and Nb-doped LiFePO4were examined with respect to undoped LiFePO4using muon spectroscopy (µSR) as a local probe. As little difference in diffusion coefficient between the pure and doped samples was observed, offering DLivalues in the range 1.8-2.3 × 10-10 cm2s-1, this implied the improvement in electrochemical performance observed within doped LiFePO4was not a result of increased local Li+diffusion. This unexpected observation was made possible with the µSR technique, which can measure Li+self-diffusion within LiFePO4, and therefore negated the effect of the LiFePO4two-phase delithiation mechanism, which has previously prevented accurate Li+diffusion comparison between the doped and undoped materials. Therefore, the authors suggest that µSR is an excellent technique for analysing materials on a local scale to elucidate the effects of dopants on solid-state diffusion behaviour.
| Type: | Article |
|---|---|
| Title: | Mechanistic insights of Li+ diffusion within doped LiFePO4 from Muon Spectroscopy |
| Location: | England |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1038/s41598-018-22435-1 |
| Publisher version: | http://dx.doi.org/10.1038/s41598-018-22435-1 |
| Language: | English |
| Additional information: | Copyright © The Author(s) 2018. Open Access: This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. Te images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Chemistry |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10045914 |
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