Electrolytic conduction in amorphous salt complexed polyethers |
| |
Institution: | 1. Department of Chemistry, College of Sciences, Northeastern University, Shenyang 110819, China;2. Clinical Medical College, China Medical University, Shenyang 110001, China;3. School of Petrochemical Engineering, Liaoning Shi Hua University, Fushun 113001, China |
| |
Abstract: | Phosphate ester extended and crosslinked poly(ethylene glycol)s were prepared from reaction of the glycols with chlorophosphates. Fully amorphous electrolytes formed with lithium trifluoromethanesulphonate showed enhanced conductivity over comparable poly(ethylene oxide) electrolytes in the temperature range 293–373 K. With O/Li=27.6, α=5.2×10−6S cm−1 at 293 K. A conductivity maximum was detected at ca. 1 mol dm−3 concentration consistent with the increase in charge carrier density opposed by medium viscosity. For all complexes the temperature dependence of conductivity obeyed the Vogel-Tamman-Fulcher and Williams-Landel-Ferry equations, with Tg(onset) for the parent polymer as the ideal glass transition temperature. Activation energy parameters from use of the VTF equation and Adam-Gibbs configurational entropy model showed a linear dependence on salt concentration. |
| |
Keywords: | |
本文献已被 ScienceDirect 等数据库收录! |
|