LAUSR

Abstract A free-standing inorganic/polymer composite electrolyte is prepared by the conventional solution casting method, which exhibits good ionic conductivity (~0.36 mS cm−1 at room temperature) and stable capacity retention with enhanced mechanical property. We can realize that the Li+ conductive spherical inorganic electrolyte, Li1.3(Al0.3Ti1.7)(PO4)3, with optimal relative contents is most effective fillers within the composite electrolyte films other phosphate compounds like as LTP and LSTP. Finally, using the resultant composite electrolyte films, we fruitfully demonstrate room temperature operating Li/electrolyte/LiFePO4 cell followed by the stable electrochemical reactions regardless of the filler contents both in polymer-rich (with 1 wt%) and inorganic-rich (with 20 wt%) composite electrolyte.