X-ray photoelectron spectroscopic study of some pure stages of graphite ferric chloride intercalation compounds

X-ray photoelectron spectroscopic (XPS) study of pure stages 3, 4 and 6 of graphite ferric chloride intercalation compounds (FeCl3-GICs) have been carried out. The change in the binding energy suggests the nature of charge transfer and lowering of Fermi level as has been reported previously for other acceptor intercalation compounds. The charge transferred/carbon atom is found to reach a maximum for stage 4 and thereafter it remains a constant. © 1997 Elsevier Science B.V.