UCL Discovery
UCL home » Library Services » Electronic resources » UCL Discovery

Muon studies of Li+ diffusion in LiFePO4 nanoparticles of different polymorphs

Ashton, TE; Laveda, JV; MacLaren, DA; Baker, PJ; Porch, A; Jones, MO; Corr, SA; (2014) Muon studies of Li+ diffusion in LiFePO4 nanoparticles of different polymorphs. Journal of Materials Chemistry A , 2 (17) pp. 6238-6245. 10.1039/c4ta00543k. Green open access

[thumbnail of c4ta00543k.pdf]
Preview
Text
c4ta00543k.pdf - Published Version

Download (1MB) | Preview

Abstract

The lithium diffusion in nanostructured olivine LiFePO4 has been investigated for the first time using muon spectroscopy (μSR). A microwave-assisted approach has been employed for nanoparticle preparation, where the choice of solvent is shown to play an important role in determining particle morphology and crystal chemistry. Two phases have been obtained: Pnma LiFePO4 and the high pressure Cmcm phase. The Li+ diffusion behaviour is strikingly different in both phases, with DLi of 6.25 × 10−10 cm2 s−1 obtained for Pnma LiFePO4 in good agreement with measurements of bulk materials. In contrast, Li+ diffusion is impeded with the addition of the high pressure Cmcm phase, with a lower DLi of 3.96 × 10−10 cm2 s−1 noted. We have demonstrated an efficient microwave route to nanoparticle synthesis of positive electrode materials and we have also shown μSR measurements to be a powerful probe of Li+ diffusion behaviour in nanoparticles.

Type: Article
Title: Muon studies of Li+ diffusion in LiFePO4 nanoparticles of different polymorphs
Open access status: An open access version is available from UCL Discovery
DOI: 10.1039/c4ta00543k
Publisher version: http://dx.doi.org/10.1039/c4ta00543k
Language: English
Additional information: This article is licensed under a Creative Commons Attribution 3.0 Unported Licence (http://creativecommons.org/licenses/by/3.0/).
UCL classification: UCL
UCL > Provost and Vice Provost Offices
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.ucl.ac.uk/id/eprint/1505783
Downloads since deposit
74Downloads
Download activity - last month
Download activity - last 12 months
Downloads by country - last 12 months

Archive Staff Only

View Item View Item