Sulfurated hydrocarbon materials having high capacity and secondary cells using the same

Abstract

The present invention relates to a novel sulfurated hydrocarbon material having electrochemical activity, high capacity, and good reversibility, which can be used as an electrode material for the secondary battery. More particularly, it relates to a sulfurated hydrocarbon material, which is prepared by the sulfuration of the olefinic unsaturated hydrocarbon, in the presence of a amine promoter. The sulfurated hydrocarbon material contains from 40 to 88% of sulfur and is represented by the formula (CHxSy)z, wherein: x is a real number in the range of 0.5≦x≦1.75; y is a real number in the range of 0.2≦y≦3.2; and z is an integer equal to or greater than 5. Also, the present invention provides a secondary battery comprising i) a positive electrode comprising said sulfurated hydrocarbon compound; ii) a polymer electrolyte; and iii) a negative electrode made of alkali metal or alkali metal alloy.

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