Effect of ether coordination for sodium intercalation into poly(vinyl chloride) cokes with different graphitization degree

Sodium intercalation in three unidentate and three bidentate ether solutions having different molecular sizes was investigated using poly(vinyl chloride) cokes heat-treated at different temperatures. Co-intercalation of ether molecules with sodium cations was found to be governed strongly by the graphitization degree of hosts in contrast with other alkali metals. This tendency is dependent on the strength of bond between sodium and ether molecule, and also the bulk of coordinated molecules; the limit of graphitization degree for co-intercalation of solvent molecules was lower in bidentate solution than in unidentate ones, and the large solvents were prevented from co-intercalation more strongly than small ones.