| 摘要 |
PROBLEM TO BE SOLVED: To provide a new electroconductive polypyrrole derivative having sulfide bonds in the molecule which split in a reductive state and recombine in a oxidative state repeatedly in expectation of use as a positive pole active material of a secondary battery. SOLUTION: This new polypyrrole derivative is obtained by reacting dihalogenopyrrole with alkali metal polysulfide under a specific conditions to produce a pyrrole having more than three sulfur atoms bridged, followed by electrolytic polymerization of the pyrrole to produce the new polypyrrole derivative expressed by formula (1) (R1, R2 each independently represents linear or branched alkylene group having 1 to 4 carbons, n is an integer of 3 to 6, and m is an integer of 10 to 10,000) which is confirmed to have excellent electric characteristics.
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