| dc.description.abstract | Lithium-ion battery holds great promises for automobile applications and for energy storage purpose. In this work, we present a highly ion conducting solid polymer electrolytes (SPEs) membrane, prepared under external electric field (EF) poling where nonvolatile conducting medium, ionic liquids (ILs) in solid polymer electrolytes. The poling created aligned morphology in PVDF-HFP and PMMA blending system yielding long-range ordered morphology, but remains nearly total amorphous where nonflammable ionic liquids is fully dispersed to deliver unusually high Li+ transport. Room temperature conductivity reached above 10-3S/cm and the highest conductivity of 10-2 S/cm is observed at 70oC for polymer electrolyte containing PMMA/PVDF-HFP (50/50 wt%, e5EL). The alignment by the external electric field not only altered the interaction between polymer components which has suppressed PVDF-HPF crystallinity in the SPEs, but it also improves mechanical strength of the membrane, and reduced the electrode-electrolyte interface resistance. The coin cell (R2032) using e5EL, e4EL and e3EL as the SPEs and LiFePO4 cathode shows fair half-cell performance and durable cycle stability. Under 0.1C-rate the half-cell displayed discharge capacity which could above a1most 120 mAh/g, and at 0.5C-rate the capacity reached above 60mAh/g , especially e3EL reached 70mAh/g. | en_US |