Polycarbon sulfide, process for preparing the same and nonaqueous electrolyte battery comprising the same

摘要

By eliminating a part of sulfur atoms of the polysulfide segment of the formula: -Sm- (m>=3) of an organic sulfur compound, a carbon polysulfide is synthesized, which comprises carbon and sulfur as constitutive elements and contains at least 67 wt. % of sulfur and at least 95 wt. % of carbon and sulfur in total, and which has a disulfide linkage formed by most of the sulfur atoms in the molecule and also has a highly uniform structure. A nonaqueous electrolytic battery which has a high capacity and shows a small decrease in capacity in association with cyclic charge and discharge is provided using this carbon polysulfide as an active material for the positive electrode.