Abstract
We prepared the polyethylene oxide (PEO)-based composite membrane electrolytes which contained the specialized ionic liquids and the inorganic filler of Li7La3Zr2O12 (LLZO). Mixtures of ionic liquids and tetragonal inorganic fillers were used as additives to prepare composite electrolytes for an application of all solid-state lithium ion batteries (ASLBs). In order to improve the ionic conductivity of composite membranes, we studied the structural change and the electrochemical behaviors as a function of the amounts of solvated ionic liquids (ILs). The addition effect of solvated ILs showed the higher ionic conductivity such as 10−4 S/cm at 55 °C by reducing the crystalline character of polymer based composite, resulting in the enhanced ion conducting property. The hybrid composite membranes were successfully made in flexible form, and have an excellent thermal and electrochemical stability. Finally, the electrochemical performance of the half-cell was evaluated, and it was confirmed that the ion-conducting characteristics were influenced and controlled by the effect of ILs.
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Acknowledgements
This research was supported by Korea Electrotechnology Research Institute (KERI) Primary research program through the National Research Council of Science and Technology (NST) funded by the Ministry of Science, ICT and Future Planning (MSIP) (No. 17-12-N0101-35).
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Park, JY., Park, JW., Doh, CH. et al. Effect of solvated ionic liquids on the ion conducting property of composite membranes for lithium ion batteries. Res Chem Intermed 44, 6039–6051 (2018). https://doi.org/10.1007/s11164-018-3474-1
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DOI: https://doi.org/10.1007/s11164-018-3474-1