Abstract
In this study, we prepared an ionic liquid composite solid polymer electrolyte (PEO-LiTFSI-) with poly(ethylen oxide), lithium bis(trifluoromethanesulfonyl)imide, N-butyl-N-methylpyrrolidinium bis(trifluoromethanesulfonyl)imide by blending-cross linking process. Although the PEO-LiTFSI- composite solid polymer electrolyte displayed a small peak at 4.4 V, it had high electrochemical oxidation stability up to 5.7 V. Ionic conductivity of the PEO-LiTFSI- composite solid polymer electrolyte increased with increasing temperature from at to at . To investigate the electrochemical properties, the PEO-LiTFSI- composite solid polymer electrolyte assembled with cathode and Li-metal anode. At 0.1 C-rate, the cell delivered for , for and for , respectively. The PEO-LiTFSI- solid polymer electrolyte exhibited good charge-discharge performance in Li/SPE/ cells at .
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