Anion secondary batteries utilizing a reversible BF4 insertion/extraction two-dimensional Si material

Nakano, H, Sugiyama, Y, Morishita, T, Spencer, M, Snook, I, Kumai, Y and Okamoto, H 2014, 'Anion secondary batteries utilizing a reversible BF4 insertion/extraction two-dimensional Si material', Journal of Materials Chemistry A, vol. 20, pp. 7588-7592.


Document type: Journal Article
Collection: Journal Articles

Title Anion secondary batteries utilizing a reversible BF4 insertion/extraction two-dimensional Si material
Author(s) Nakano, H
Sugiyama, Y
Morishita, T
Spencer, M
Snook, I
Kumai, Y
Okamoto, H
Year 2014
Journal name Journal of Materials Chemistry A
Volume number 20
Start page 7588
End page 7592
Total pages 5
Publisher R S C Publications
Abstract The development of lightweight, long lasting Li-ion batteries is of great technological importance for hybrid and plug-in hybrid electric vehicles, as well as for power grid applications. Here we report an alternative approach to the use of Li cations, based on the fabrication of BF4 anion rocking-chair-type secondary batteries. For the anode material, we report a Si-based compound, [Si10H8(OCH2CH2NH(CH3)(2))(2)](BF4)(2), which is capable of reacting with two BF4 anions per formula unit at a potential of 1.8 V, giving a reversible capacity of 80 mA h g(-1). This anion battery also showed superior performance under thermal abuse compared with Li-ion batteries. Furthermore, the anion battery is operable at -30 degrees C, a temperature at which Li-ion batteries are generally not operable because Li-ions are solvated by coordination with basic organic molecules around this temperature.
Subject Physical Chemistry of Materials
Condensed Matter Modelling and Density Functional Theory
Functional Materials
Keyword(s) RECHARGEABLE LITHIUM BATTERIES
ELECTROCHEMICAL INTERCALATION
SILICON NANOSHEETS
ION BATTERIES
GRAPHITE
PERFORMANCE
CAPACITORS
ELECTRODE
CATHODES
ANODES
DOI - identifier 10.1039/C4TA00456F
Copyright notice © The Royal Society of Chemistry 2014
ISSN 2050-7496
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