Organic Electrolyte Improving the Performance of Ionic Liquid-PEO Polymer Electrolyte Based Lithium Ion Batteries

Ionic liquid (IL)- polymer composite electrolyte was prepared from Pp13TFSI and polyethylene oxide(PEO). Organic electrolyte -1 mol·L-1 LiPF6 in EC: DEC (50:50, v/v) was added as the ameliorant to improve the interphase stability. The EIS, CV and XPS results showed that the well passive film forms between the IL-polymer electrolyte and Li4Ti5O12 anode. The Li/Li4Ti5O12 cell fabricated by the IL-polymer electrolyte also obtained the acceptable and reversible capacity by the addition of organic electrolyte.