Rights statement: This is the peer reviewed version of the following article:J. Billaud, C. Eames, N. Tapia-Ruiz, M. R. Roberts, A. J. Naylor, A. R. Armstrong, M. S. Islam, P. G. Bruce, Adv. Energy Mater. 2017, 7, 1601043 which has been published in final form at http://onlinelibrary.wiley.com/doi/10.1002/aenm.201601043/abstract This article may be used for non-commercial purposes in accordance With Wiley Terms and Conditions for self-archiving.
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Final published version
Licence: CC BY: Creative Commons Attribution 4.0 International License
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
}
TY - JOUR
T1 - Evidence of enhanced ion transport in Li-rich silicate intercalation materials
AU - Billaud, Juliette
AU - Eames, Christopher
AU - Tapia Ruiz, Nuria
AU - Roberts, Matthew R.
AU - Naylor, Andrew J.
AU - Armstrong, A. Robert
AU - Islam, M. Saiful
AU - Bruce, Peter G.
N1 - This is the peer reviewed version of the following article:J. Billaud, C. Eames, N. Tapia-Ruiz, M. R. Roberts, A. J. Naylor, A. R. Armstrong, M. S. Islam, P. G. Bruce, Adv. Energy Mater. 2017, 7, 1601043 which has been published in final form at http://onlinelibrary.wiley.com/doi/10.1002/aenm.201601043/abstract This article may be used for non-commercial purposes in accordance With Wiley Terms and Conditions for self-archiving.
PY - 2017/6/7
Y1 - 2017/6/7
N2 - 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.
AB - 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.
U2 - 10.1002/aenm.201601043
DO - 10.1002/aenm.201601043
M3 - Journal article
VL - 7
JO - Advanced Energy Materials
JF - Advanced Energy Materials
SN - 1614-6832
IS - 11
M1 - 1601043
ER -