Obtaining and crystal structure of graphite intercaled by nickel
Keywords:intercalated graphite, crystal structure, electron beam, mechanical alloying, X-ray powder diffraction
The intercalated graphite-like material C98Ni is obtained by the thermal decomposition of cubic NiC monocarbide, which was previously synthesized by a mechanical alloying of the Ni–CNT or Ni–graphite charge with subsequent compaction of the synthesis product by cold pressing. It is shown that the NiC material ob- tained under the action of an electron beam gradually exfoliates into two separate phases with the formation of carbon-depleted NiCx carbide and a graphite-like phase. According to X-ray diffraction studies, the crystal struc- ture of this graphite-like phase of C98Ni composition can be described within the space group P-3m1 (No. 164) (a = 0.2464 (1) nm, c = 0.6768 (2) nm) with partial filling of Ni atoms of one of the two possible intercarbon layers, which are slightly rimped in the C98Ni structure. It is shown that the obtained C98Ni phase is an inter- ed graphite, the composition of which can be varied.
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