X-ray investigation of highly saturated Li-graphite intercalation compound Original Research Article

Highly saturated lithium-graphite intercalation compounds (of a composition LiC2LiC4) synthesized under high-pressure conditions were investigated using X-ray diffraction. It was shown that these compounds present the structure with hexagonal unit cell with a parameter 8.63 Å, c = 3Ic = 3 · 3.7 = 11.1 Å. The most probable stoichiometry for this unit cell is LiC2.67, as deduced from the comparison of the calculated and observed intensities of (hkℓ) reflections. It is supposed that this structure is the most “stable” step in decomposition of LiC2 compound obtained under pressure.