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Synthesis and XPS investigation of superdense lithium-graphite intercalation compound, LiC2 |
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| Authors: | VZ Mordkovich |
| Affiliation: | a Yoshimura π-Electron Materials Project, ERATO, JRDC, Matsushita Research Institute Tokyo, Inc., Higashimita 3-10-1, Tama-ku Kawasaki 214 Japan |
| Abstract: | The superdense lithium-graphite intercalation compound (GIC),LiC2, first synthesized by the author was prepared by the original technique in a piston-cylinder high-pressure chamber with internal heater. Cleaved surfaces of this compound, LiC3, LiC6 and pristine graphite were studied by the X-ray photoelectron spectroscopy (XPS) technique. It was shown that chemical shifts of carbon do not vary in the range LiC6 to LiC2 which suggests that the additional lithium intercalation into LiC6 gives no significant change in the charge transfer rate per carbon atom. Carbon/lithium atom ratios were obtained for freshly cleaved surfaces and for the surfaces after argon ion bombardment. It was shown that the bombardment results in the surface decomposition of LiC2-GIC. |
| Keywords: | Intercalation compounds Synthesis (chemical) Lithium compounds Density (specific gravity) Charge transfer Ion bombardment X ray photoelectron spectroscopy Decomposition Composition effects X ray diffraction analysis Superdense lithium graphite compound Pristine graphite Lithium atom ratios Argon ion bombardment Carbon atom ratios |
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