Vanadium oxide fluoride-graphite intercalation compounds, i.e. C x (VOF 3 )F with 17.2≤x≤38.8, have been prepared from V 2 O 5 and graphite in a fluorine atmosphere at 130°C. The structural characteristics of these compounds have been deduced from X-ray diffraction and X-ray photoelectron spectroscopy measurements. Intercalation of VOF 3 and fluorine was pointed out. The electrochemical insertion of lithium into C 1 7 . 7 (VOF 3 )F was investigated by chronopotentiometry and a.c. impedance spectroscopy in propylene carbonate-1 M LiClO 4 . The chemical diffusion coefficient, D L i , was estimated to be close to 4.0 10 - 1 0 cm 2 s - 1 for all the values of the intercalation ratio of lithium under study (0<y<1.5).