Projects per year
Abstract
We have reinvestigated the polyanionic compound Na2Fe2(C2O4)3·2H2O, previously reported to be electrochemically inactive in lithium-ion batteries (LIBs), as a positive electrode for sodium-ion batteries (NIBs). The present study demonstrates that it is capable of delivering a reversible capacity close to its theoretical value (117 mAhg–1) with three redox plateaus at 2.9, 3.3 and 3.6 V vs. Na/Na+ in the potential range 1.7–4.2 V. The obtained energy density of 326 WhKg–1 is among the highest of all reported polyanionic cathodes in NIBs. The origin of the electrochemical activity can be traced back to the electronic structure of the compound and the low migration energy barrier of the alkali ion observed in first-principles density-functional theory calculations.
Original language | English |
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Pages (from-to) | 9095-9101 |
Journal | Chemistry of Materials |
Volume | 29 |
Issue number | 21 |
Early online date | 4 Oct 2017 |
DOIs | |
Publication status | Published - 14 Nov 2017 |
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Dive into the research topics of 'A reinvestigation of Na2Fe2(C2O4)3·2H2O: an iron-based positive electrode for secondary batteries'. Together they form a unique fingerprint.Projects
- 1 Finished
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Design & synthesis of new fluoride: Design and synthesis of new fluoride cathode materials for solid-state batteries
Lightfoot, P. (PI)
1/02/15 → 31/01/17
Project: Fellowship
Datasets
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Data underpinning article ""A reinvestigation of Na2Fe2(C2O4)3.2H2O: an iron-based positive electrode for secondary batteries"
Lightfoot, P. (Creator), Yao, W. (Creator), Sougrati, M.-T. (Creator), Hoang, K. (Creator), Hui, J. (Creator) & Armstrong, A. R. (Creator), University of St Andrews, 16 Oct 2017
DOI: 10.17630/61a92a73-3cb6-4008-9bb4-904ea63dd6e5
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