Effect of reaction time on the composition of graphite bis(trifluoromethanesulfonyl)imide

Graphite intercalation compounds (GICs) of composition CxN(SO2CF3)2 · δF are prepared under ambient conditions in 48% hydrofluoric acid, using K2MnF6 as an oxidizing reagent. The stage 2 GIC product structures are determined using powder XRD and modeled by fitting one dimensional electron density profiles. A new digestion method followed by selective fluoride electrode elemental analyses allows the determination of free fluoride within products, and the compositional x and δ parameters are determined for reaction times from 0.25 to 500 h.