Abstract
Free-standing composite polymer membranes comprising of high molecular weight poly (ethylene oxide) (PEO) complexed with lithium perchlorate (LiClO4) and Li6La2BaTa2O12 (LLBTO) garnet oxide as filler were developed via standard solution-casting method. The as-synthesized composite membranes were investigated through powder x-ray diffraction (PXRD), differential scanning calorimetry (DSC), scanning electron microscopy (SEM), and impedance spectroscopy techniques for their phase, thermal, morphological, and electrical properties, respectively. The lithium ion conductivity of polymer composite membranes consisting of PEO8/LiClO4 with various weight percents (5, 10, 15, 20, 25, and 30) of LLBTO were evaluated. We demonstrated a significant enhancement in Li+ conductivity with the addition of LLBTO to the polymer-lithium salt complex. Among the investigated membranes, the composite containing 20 LLBTO wt% garnet oxide exhibits maximized room temperature (30 °C) Li+ conductivity of 2.03 × 10−4 S cm−1 and electrochemical stability greater than 4.5 V.
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Buvana, P., Vishista, K., Shanmukaraj, D. et al. Lithium garnet oxide dispersed polymer composite membrane for rechargeable lithium batteries. Ionics 23, 541–548 (2017). https://doi.org/10.1007/s11581-016-1830-y
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DOI: https://doi.org/10.1007/s11581-016-1830-y