Premium
Ethynedithiol‐based polyeneoligosulfides as active cathode materials for lithium‐sulfur batteries
Author(s) -
Trofimov B. A.,
Myachina G. F.,
Rodionova I. V.,
Mal'kina A. G.,
Dorofeev I. A.,
Vakul'skaya T. I.,
Sinegovskaya L. M.,
Skotheim T. A.
Publication year - 2007
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.27162
Subject(s) - redox , sulfur , lithium (medication) , polymerization , hydrolysis , chemistry , cathode , ammonia , yield (engineering) , inorganic chemistry , polymer chemistry , electrochemistry , materials science , organic chemistry , polymer , metallurgy , electrode , medicine , endocrinology
Abstract Ethynedithiol‐based polyeneoligosulfides have been synthesized in 96% yield by the reaction of sodium acetylides (HCCNa, NaCCSNa) and elemental sulfur through the NaC sp 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 (10 17 to 10 18 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