Stability effect of polymer-based additives on EMITFSI-LiTFSI electrolyte in lithium-air battery
By Mahmud Tokur and Hasan Algul and Seyma Ozcan and Tugrul Cetinkaya and Mehmet Uysal and Mehmet Oguz Guler and Hatem Akbulut
Published in Solid State Ionics
2016
Abstract
Electrolytes with polymer additives are reported as promising electrolyte systems that poses many advantages over nonaqueous ionic liquid-based electrolytes in terms of electrochemical stability. In this study, novel 1-ethyl-3-methyl-imidazoliumbis (trifluoromethanesulfonyl)imide (EMITFSI)/lithium bis(trifluoromethanesulfonyl)imide (LITFSI)-based electrolytes using polyethylene oxide (PEO) and polyvinylidene fluoride (PVDF) additives were prepared and the electrochemical performances were studied. The surfaces of the cathodes were subjected to scanning electron microscopy (SEM) and X-ray diffraction (XRD) analyses. The as-prepared electrolytes were also subjected to cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and galvanostatic charge/discharge tests for further electrochemical analyses. One molar of EMITFSI-LiTFSI electrolyte with 0.1 wt%. \PEO\ exhibited a low and stable electrode resistance of 47.4 ?