DEBYE-WALLER FACTORS OF ICL-GRAPHITE INTERCALATION COMPOUNDS PREPARED FROM NATURAL GRAPHITE FLAKES AND GRAPHITIZED POLYIMIDE FILMS

摘要

Stages 1-3 ICl-graphite intercalation compounds (GICs) are prepared from natural graphite flakes and graphitized polyimide films by an ordinary two-bulb method. The stage structures are studied by X-ray diffraction, and the Debye-Waller(DW) factors are determined by minimizing the crystallographic R factor. The effective DW factors of stage 1-3 ICl-GICs from natural graphite flakes decrease with increasing stage number, indicating that the stiffness of the GICs along the c-axis increases with increasing stage number. The effective DW factor of the stage 1 ICl-GIC from graphitized polyimide film is smaller than that from natural graphite flakes. The DW factors of the respective carbon, iodine and chlorine atoms in the ICl-GICs are also determined. [References: 21]