THE INVESTIGATION OF THE SOLVENT EFFECT ON THE CONDUCTION BEHAVIOR OF IONIC LIQUID COMPOSITES ELECTROLYTES

Jun-Hong Lin, Zhao-Cheng Chen, Bo-Wen Shi
unpublished
Ionic liquid/PVDF-HFP based electrolyte is one of the promising solid state electrolyte for energy storage devices. It is known that additional amount of propylene carbonate (PC) or Ethylene carbonate (EC) can improve the conductivity of the electrolyte though the ion concentration is diluted. Both dielectric spectroscopy and time domain method are employed to characterize the segmental dynamics of the polymer matrix and the charge dynamics of ionic in the electrolyte over a broad temperature
more » ... broad temperature range. It is found the both conductivity and mobility of the electrolyte are improved due to the acceleration of the PVDF-HFP chains by the additional solvents. Also the mobile ion concentration was of the sample with PC or EC is higher than that without solvent even the total ion concentration of the ionic liquid salt is diluted.
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