New Electrochemically Active Highly Sulfurized Polyconjugated Polymers |
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Authors: | B A Trofimov G F Myachina S A Korzhova A G Mal'kina L V Sokolyanskaya T I Vakul'skaya Yu V Mikhailik T A Skotheim |
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Institution: | (1) Siberian Division, Russian Academy of Sciences, Favorsky Irkutsk Institute of Chemistry, Irkutsk, Russia;(2) Moltech Corporation, Tucson, AZ, USA |
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Abstract: | The electrochemical activity of new highly sulfurized polyconjugated polymers is studied. The polymers, polythienothiophene, poly(4,5,6,7-tetrathieno-4,5,6,7-tetrahydro-2,3-dehydrobenzothiophene), poly(6-methylthieno2,3-b]pyridine-4-thione-5-thiol), and poly(6H-thieno2,3-b]-azepine-6,7(8H)-dithione) are obtained in a deep sulfurization of polyethylene, polystyrene, and poly(5-vinyl-2-methylpyridine) by elemental sulfur. Employed as active cathodic material in lithium batteries, these polymers ensure their prolonged cycling with specific discharge capacity of up to 339 mA h/g. The effect of the conducting additive and electrolyte on the energy capacity and cycling of polymer cathodes in lithium batteries is discussed. |
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