Patent ID: 6036934
Filing Date: 2000-03-14
Classification: C01B,C22C,C23C,D01F

Abstract:
A method of making chemically modified carbon-based materials from a precursor containing graphite fluoride, said method comprising:exposing graphite fluoride to a halocarbon environment at a temperature between room temperature and 250.degree. C., thereby allowing said halocarbon to diffuse into the lamellar crystal structure of said graphite fluoride so that a first intermediate total system is formed comprising a graphite fluoride-halocarbon mix in a halocarbon environment;heating said first intermediate total system to a temperature of between approximately 250.degree. C. and approximately 450.degree. C., thereby substantially defluorinating said graphite fluoride while also permitting said halocarbon to de-halogenate and form chemical bonds with and thereby bridge adjacent graphitic lattice planes within said graphite fluoride and resulting in a first intermediate carbon material containing halogen;heating to approximately 650.degree. C. said first intermediate carbon material in an inert environment, thereby producing a fluorine-free second intermediate carbon material;heating to a temperature in the range of approximately 1000.degree. C. to 1160.degree. C. said second intermediate carbon material in an inert environment, thereby to produce a final product which is an apparently non-graphtic, chemically modified carbon.