Abstract
Polyacetylene obtained by the dehydrochlorination of polyvinyl chloride in the NaOH—DMSO system undergoes sulfurization with elemental sulfur at 120—300 °C to liberate hydrogen sulfide and to form electroconducting (0.7·10–12—5.8·10–15Sm nm–1) and paramagnetic (1.5·1017—1.7·1019sp g–1, g = 2.0035—2.0045, ΔH= 0.44—0.66 mT) dark powders with a metallic luster. Their IR spectra and comparison with the samples of sulfurized polyethylene show that sulfurized polyacetylene contains poly(vinylene polysulfide), poly(thienothiophene), and related structures. The polymers afford the cathode discharge capacity of lithium batteries up to 950 mA h g–1(in the first cycle) and stable cycling at a level of 500—300 mA h g–1(25 cycles).
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Trofimov, B.A., Vasil"tsov, A.M., Petrova, O.V. et al. Sulfurization of polymers. 6. Poly(vinylene polysulfide), poly(thienothiophene), and related structures from polyacetylene and elemental sulfur. Russian Chemical Bulletin 51, 1709–1714 (2002). https://doi.org/10.1023/A:1021307723134
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DOI: https://doi.org/10.1023/A:1021307723134