The electrical property and its mechanism of intercalation compounds of CuCl2

The electrical property of 1-4 stages of intercalation compounds of CuCl2, which were synthesized with 2-3 mu m graphite powder, was measured by the f our-probe method. Their conductivity was 1.5-2.2 times' as that of their ho st material, graphite. The higher the stage, the higher the conductivity. T he microanalysis of chemical compounds by the X-ray energy spectrum scannin g analysis of TEM testified that the atom ratio of chlorine and cupric was non-stoichoimetric. The vacancy of the chlorine anion in the GICs increased the concentration of the carrier particle. They link up in c-axis, and enl arged the activity space of the carrier particle. The exchange of the elect rovalence of the cupric ion has been testified by XPS-ESCA. Graphite and ch loride in the stage structure, seem to be the conductor and insulator, whic h form the '"sandwich" structure. This special structure produced a weak ch emical bond belt and provided the carrier space in the perpendicular direct ion to the c-axis. These factors in and vertical to the direction of c-axis together increased the electrical properties.