Ethynedithiol-based polyeneoligosulfides as active cathode materials for lithium-sulfur batteries
| Autor: | Tamara I. Vakul'skaya, I. V. Rodionova, Ivan A. Dorofeev, G. F. Myachina, Lidiya M. Sinegovskaya, T. A. Skotheim, Anastasiya G. Mal'kina, Boris A. Trofimov |
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| Rok vydání: | 2007 |
| Předmět: |
Conductive polymer
Polymers and Plastics Inorganic chemistry chemistry.chemical_element Dithiol Solution polymerization General Chemistry Sulfur Redox Lithium battery Surfaces Coatings and Films chemistry.chemical_compound chemistry Polymerization Yield (chemistry) Polymer chemistry Materials Chemistry |
| Zdroj: | Journal of Applied Polymer Science. 107:784-787 |
| ISSN: | 1097-4628 0021-8995 |
| DOI: | 10.1002/app.27162 |
| Popis: | Ethynedithiol-based polyeneoligosulfides have been synthesized in 96% yield by the reaction of sodium acetylides (HCCNa, NaCCSNa) and elemental sulfur through the NaCsp bond in liquid ammonia with the following spontaneous polymerization of ethynedithiols (HSCCSH) formed by the hydrolysis. The polyeneoligosulfides synthesized are brown powders (up to 77% sulfur content, mp 128–184°C), partially soluble in organic solvents. They are high-resistance semiconductors (10−13 to 10−14 S cm−1), possess paramagnetic (1017 to 1018 spin g−1) and redox properties. The oligosulfides obtained, being redox systems capable of reversible redox processes, provide high values of discharge capacity (345–720 mA h g−1) of rechargeable lithium-sulfur batteries. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci, 2008 |
| Databáze: | OpenAIRE |
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