Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 2, Issue 20, Pages 7588-7592Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4ta00456f
Keywords
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Funding
- JST, PRESTO
- Grants-in-Aid for Scientific Research [24740297] Funding Source: KAKEN
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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.
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