A novel PEO-based composite polymer electrolyte with NaAlOSiO molecular sieves powders |
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Authors: | De-Jiang?Qi Email author" target="_blank">Hong-Qiang?RuEmail author Xiao-Guo?Bi Xiao-Hong?Yang Zi-Ning?Ma |
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Institution: | (1) Department of Physics, Shenyang Institute of Engineering, Shenyang, 110136, People’s Republic of China;(2) School of Material & Metallurgy, Northeastern University, Shenyang, 110004, People’s Republic of China;(3) Department of Energy and Power Engineering, Shenyang Institute of Engineering, Shenyang, 110136, People’s Republic of China;(4) Center of test and analysis, China Criminal Police University, Shenyang, 110035, People’s Republic of China; |
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Abstract: | Ion-conducting thin film polymer electrolytes based on poly(ethylene oxide) (PEO) complexes with NaAlOSiO molecular sieves
powders has been prepared by solution casting technique. X-ray diffraction, scanning electron microscopy, differential scanning
calorimeter, and alternating current impedance techniques are employed to investigate the effect of NaAlOSiO molecular sieves
on the crystallization mechanism of PEO in composite polymer electrolyte. The experimental results show that NaAlOSiO powders
have great influence on the growth stage of PEO spherulites. PEO crystallization decrease and the amorphous region that the
lithium-ion transport is expanded by adding appropriate NaAlOSiO, which leads to drastic enhancement in the ionic conductivity
of the (PEO)16LiClO4 electrolyte. The ionic conductivity of (PEO)16LiClO4-12 wt.% NaAlOSiO achieves (2.370 ± 0.082) × 10−4 S · cm−1 at room temperature (18 °C). Without NaAlOSiO, the ionic conductivity has only (8.382 ± 0.927) × 10−6 S · cm−1, enhancing 2 orders of magnitude. Compared with inorganic oxide as filler, the addition of NaAlOSiO molecular sieves powders
can disperse homogeneously in the electrolyte matrix without forming any crystal phase and the growth stage of PEO spherulites
can be hindered more effectively. |
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