The addition of Al2O3 in composite electrolytes consisting of polyethyleneoxide and polytetramethylene glycol-based waterborne polyurethane

Composite electrolytes (CEs) containing polyethylene oxide (PEO), polytetra m-ethylene glycol based waterborne polyurethane (WPU(PTMG)), LiClO4/propyle ne carbonate (PC), and aluminum oxide (Al2O3) were prepared by blending. Th e influences of the addition of Al2O3 in CEs were investigated using the fo llowing methods. Differential scanning calorimetry (DSC) and polarizing mic roscopy (PM) were employed for material characterization. The swollen weigh t of CEs was measured to appraise the maximum tolerated intake. Alternating current (AC) impedance was employed to obtain the ionic conductivity. Furt hermore, Li/CEs/LiCoO2 laminated cells were assembled to measure open-circu it voltages (V proportional to) for the application evaluation. Accordingly , the CE consisting of 20% PEO, 20% WPU(PTMG), 10% Al2O3, and 50% LiClO4/PC was found to have the best performance for all the investigated characteri stics.