Projects per year
Abstract
The silicate compounds Li2MSiO4 (where M = Mn, Fe, Co) have received significant attention recently as Li intercalation electrodes. Overwhelmingly they exhibit relatively poor kinetics of ion intercalation. By synthesizing Li-rich solid solutions of the form Li2+2xFe1−xSiO4 (with 0 ≤ x ≤ 0.3), the structural requirements for fast ion transport and hence relatively fast intercalation have been identified. Specifically the presence of additional Li+ in interstitial sites, not normally occupied in the stoichiometric Li2FeSiO4 compound, enhances ion transport by more than two orders of magnitude. The results, obtained by combining electrochemical measurements, with powder X-ray and neutron diffraction and atomistic modeling of the ion dynamics, provide valuable guidance in designing future intercalation electrodes with high Li-ion transport and, hence, fast electrode kinetics.
Original language | English |
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Article number | 1601043 |
Number of pages | 9 |
Journal | Advanced Energy Materials |
Volume | 7 |
Issue number | 11 |
Early online date | 17 Jan 2017 |
DOIs | |
Publication status | Published - 7 Jun 2017 |
Keywords
- Interstitial lithium
- Lithium iron silicate
- li2+2xFe1-xSiO4
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Dive into the research topics of 'Evidence of enhanced ion transport in Li-rich silicate intercalation materials'. Together they form a unique fingerprint.Projects
- 2 Finished
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Platform Grant Renewal: Platform Grant Renewal - Materials for Lithium Batteries
Bruce, FRS, P. (PI)
1/09/11 → 31/08/16
Project: Standard
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SUPERGEN - The Energy Storage Consortium: SUPERGEN - The Energy Storage Consortium
Bruce, FRS, P. (PI)
15/02/10 → 14/02/14
Project: Standard