Abstract
The buffering of 1-ethyl-3-methylimidazolium chloride-aluminum trichloride room-temperature ionic liquids (melts) using alkali metal bromides and iodides was studied. The bromide or iodide salts buffer the melts by reaction with the ion, but the bromide or iodide ions do not replace the chloride from the in the melts. Unlike melts buffered with alkali metal chlorides, it is easy to deposit the alkali metals, and thus it may be possible to use these buffered melts in power sources. In melts buffered with a mixture of lithium chloride and iodide, it is possible to both deposit and strip lithium metal. As seen with melts buffered with alkali metal chlorides, the buffered melts appear to be more acidic than expected from the low concentration of the acidic ion. © 2001 The Electrochemical Society. All rights reserved.
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