SULFUR-SULFUR LINKS CONTAINING NOVEL CONDUCTING POLYMER BASED CATHODE MATERIALS, AND LITHIUM RECHARGEABLE BATTERY OBTAINED THEREFROM

摘要

Provided are a positive electrode composition of a conductive polymer material containing a S-S bond, and a lithium secondary battery using the composition which is increased in the capacity maintenance characteristics according to the number of charge/discharge and is remarkably improved in electrical conductivity and electrochemical properties. The positive electrode composition comprises a copolymer of a polydithiodianiline repeating unit represented by the formula 1 and an N-aryl amine derivative, wherein X is H, Li, Na or K; Z is F, Cl, Br, I, ClO4, PF6, BF4, CF3SO3, HSO4 or C12H25C6H4SO3; k, k1' and k2' represent a molar ratio and are 0.01-0.5, respectively; m represents a molar ratio and is 0.05-0.95; and n represents a repeating unit and is 2-10,000. The monomer of an N-aryl amine derivative is introduced into the dithiodianiline derivative by chemical polymerization or electropolymerization.