STRUCTURE AND ELECTROCHEMICAL PROPERTIES OF CXF AND CX(VF5)YF GRAPHITE-INTERCALATION COMPOUNDS

Fluorine-graphite intercalation compounds, C(x)F, and vanadium fluoride-graphite intercalation compounds, Cx(VF5)yF, have been prepared and characterized by X-ray powder diffraction (Debye-Scherrer method) and FT-IR spectroscopy. The reduction of these stage 1 and stage 2 compounds was carried out in a solution of LiClO4 in propylene carbonate using the carbon paste electrode technique. It was observed that the potential of the reduction peak corresponding to the C(x)F samples decreased with increasing values of x. For VF5-containing compounds, three reduction peaks were observed, related to the reactions: V(V) --> V(III), V(III) --> V(0) and F --> F-.