Morphology and conductivity of in-situ PEO-LiClO4-TiO2 composite polymer electrolyte
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PEO-LiClO4-TiO2 composite polymer electrolyte films were prepared. TiO2 was formed directly in matrix by hydrolysis and condensation reaction of tetrabutyl titanate. The crystallinity, morphology and ionic conductivity of composite polymer electrolyte films were examined by differential scanning calorimetry, scanning electron microscopy, atom force microscopy and alternating current impedance spectroscopy, respectively. The glass transition temperature and the crystallinity of composite polymer electrolytes are decreased compared with those of PEO-LiClO4 polymer electrolyte film. The results show that TiO2 particles are uniformly dispersed in PEO-LiClO4-5%TiO2 composite polymer electrolyte film. The maximal conductivity of 5.5×10−5 S/cm at 20 °C of PEO-LiClO4-TiO2 film is obtained at 5% mass fraction of TiO2.
Key wordspolyethylene oxide (PEO) TiO2 composite polymer electrolyte in-situ composite conductivity
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