Carbon monofluoride
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Carbon monofluoride (CF, CFx, or (CF)x), also called polycarbon monofluoride, polycarbon fluoride, and poly(carbon monofluoride), is a material formed by high-temperature intercalation of fluorine gas into graphite, charcoal, or pyrolytic carbon powder. Its CAS number is [51311-17-2] [1]. It is a graphite intercalation compound.
Carbon is stable in fluorine atmosphere up to about 400 °C. Between 420-460 °C a greyish carbon monofluoride is formed. The compound is non-stoichiometric, with composition ranging between CF0.68 and CF0.995. Pure CF is a white compound. The fluorine atoms are located between the carbon sheets, which are buckled due to formation of carbon-fluorine covalent bonds. Reaction at higher temperature yields a mixture of fluorocarbons. [2]
A precursor of carbon monofluoride is the fluorine-graphite intercalation compound, also called fluorine-GIC.
Carbon monofluoride is used as a high energy density cathode material in lithium batteries of the "BR" type. Other uses are a wear reduction additive for lubricants, and weather-resistant additive for paints.
Other intercalation fluorides of carbon are:
- poly(dicarbon fluoride) ((C2F)n)
- tetracarbon monofluoride (TCMF, C4F)
