The electric resistivity of compacts of graphite intercalation compounds with antimony pentafluoride and with antimony pentachloride

✍ Scribed by L. Streifinger; H.P. Boehm; R. Schlo¨gl; R. Pentenrieder

• Publisher: Elsevier Science
• Year: 1979
• Tongue: English
• Weight: 610 KB
• Volume: 17
• Category: Article
• ISSN: 0008-6223
• DOI: 10.1016/0008-6223(79)90079-4

✦ Synopsis

The electric resistivities were measured for textured compacts of the intercalation compounds of graphite with SbF, and with SbC&. Starting materials were coarse flakes of natural graphite and graphite foils (0.35 and 2 mm thick). First stage compounds and mixtures of first and second stage compounds were studied. The resistivities of the compacts from flakes were strongly pressure dependent, maximum conductivity was not yet reached at 600 bar. The resistivities of preparations from graphite foils were much less pressure dependent. The resistivity of the foils decreased to 36 x lo-' am, that is 3-4% of the resistivity of the parent foils. In general, the intercalation compounds with SbFs showed somewhat higher resistivities than the SbC& compounds. This seems to be caused by formation of an insulating layer on the surface of the particles due to partial fluorination of carbon atoms with SbFs. C-F bonds were detected by IR spectroscopy and by XPS. The first stage SbFs compound is formed already at room temperature, contrary to literature reports, provided sufficient time is given.