A simple P(VdF-HFP)-LiTf system yielding highly ionic conducting and thermally stable solid polymer electrolytes

► Ionic conductivity of ~ 10− 4 S cm− 1 is achieved at 40 wt.% of LiTf. ► P(VdF-HFP)/LiTf samples are thermally stable up to 400 °C. ► SEM shows the deduction of neutral ion pair formation.