Abstract
Polystyrene was exhaustively sulfurized with elemental sulfur at 190--370 °C to liberate hydrogen sulfide and to form black lustrous powders (the sulfur content was up to 67%) possessing conductivity (10–7--10–6 S cm–1 upon doping with I2), paramagnetic properties ((3.4--13)·1019 sp g–1, g = 2.0040--2.0046, ΔH = 0.36--0.47 mT), and redox properties. The use of these polymers as active cathode materials in lithium batteries allows their repeated cycling at a specific discharge capacity of up to 330 mA h g–1. The data of elemental analysis and differential scanning calorimetry, the IR and ESR spectra, the conductivities, and the character of electrochemical activity of the polymers synthesized are consistent with poly(4,5,6,7-tetrathiono-4,5,6,7-tetrahydrobenzothiophene-2,3-diyl) and related structures.
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Trofimov, B.A., Skotheim, T.A., Mal"kina, A.G. et al. Sulfurization of polymers. 4. Poly(4,5,6,7-tetrathiono-4,5,6,7-tetrahydrobenzothiophene-2,3-diyl) and related structures based on polystyrene and elemental sulfur. Russian Chemical Bulletin 50, 253–260 (2001). https://doi.org/10.1023/A:1009526217373
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DOI: https://doi.org/10.1023/A:1009526217373