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Evidence of enhanced ion transport in Li-rich silicate intercalation materials


Reference:

Billaud, J., Eames, C., Tapia-Ruiz, N., Roberts, M. R., Naylor, A. J., Armstrong, A. R., Islam, M. S. and Bruce, P. G., 2017. Evidence of enhanced ion transport in Li-rich silicate intercalation materials. Advanced Energy Materials, 7 (11), 1601043.

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Official URL:

http://dx.doi.org/10.1002/aenm.201601043

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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+2 xFe1- 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.

Details

Item Type Articles
CreatorsBillaud, J., Eames, C., Tapia-Ruiz, N., Roberts, M. R., Naylor, A. J., Armstrong, A. R., Islam, M. S. and Bruce, P. G.
DOI10.1002/aenm.201601043
Related URLs
URLURL Type
http://www.scopus.com/inward/record.url?scp=85009876946&partnerID=8YFLogxKUNSPECIFIED
Uncontrolled Keywordsinterstitial lithium,li fe sio,lithium iron silicate
DepartmentsFaculty of Science > Chemistry
Research CentresCentre for Sustainable Chemical Technologies
Centre for Nanoscience and Nanotechnology
RefereedYes
StatusPublished
ID Code54466

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