Intercalation of graphite by AsF5 vapor: Isotherms and kinetics

✍ Scribed by J.G. Hooley

• Publisher: Elsevier Science
• Year: 1985
• Tongue: English
• Weight: 604 KB
• Volume: 23
• Category: Article
• ISSN: 0008-6223
• DOI: 10.1016/0008-6223(85)90094-6

✦ Synopsis

Kinetic and isotherm data for the weight increase of six graphites in AsF, vapor up to 8000 mm at 20°C support the production of C*AsF, and the rapid post-intercalation conversion to C,,AsF, and AsF,. At any time during intercalation, reduction of the pressure to I pm lowers the weight by the calculated weight of AsFl produced up to that time. The resultant porosity can be reversibly filled with 0.78 moles of AsFS for every 1 .OO mole of AsF, that had been removed. There is also evidence for a slow change in the structure of the partially intercalated graphite, which has the effect of decreasing the rate of any further intercalation by AsF,. The rate of this slower intercalation suggests the presence of a time-dependent stress-release factor.