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http://dx.doi.org/10.9713/kcer.2011.49.6.758

Study on Ionic Conductivity and Crystallinity of PEO/PMMA Polymer Composite Electrolytes containing $TiO_2$ Filler  

Lee, Lyun-Gyu (Department of Chemical and Biochemical Engineering, Pusan National University)
Park, Soo-Jin (Department of Chemistry, Inha University)
Kim, Seok (Department of Chemical and Biochemical Engineering, Pusan National University)
Publication Information
Korean Chemical Engineering Research / v.49, no.6, 2011 , pp. 758-763 More about this Journal
Abstract
In this work, polymer composite electrolytes were prepared by a blend of poly(methyl methacrylate) (PMMA) and poly(ethylene oxide) (PEO) as a polymer matrix, propylene carbonate as a plasticizer, $LiClO_4$ as a salt, and by containing a different content of $TiO_2$, by using the solution casting method. The crystallinity and ionic conductivity of the polymer electrolytes was evaluated using X-ray diffraction(XRD) and AC impedance method, respectively. The morphology of composite electrolyte film was analyzed by SEM method. From the experimental results, by increasing the $TiO_2$ content, crystallinity of PEO was reduced, and ionic conductivity was increased. In particular, the ionic conductivity was dependent on the content of $TiO_2$ and showed the highest value 15 wt%. However, when $TiO_2$ content exceeds 15 wt%, the ionic conductivity was decreased. According to the surface morphology, the ionic conductivity was decreased because the polymer composite electrolytes showed a heterogenous morphology of fillers due to immiscibility or aggregation of the filler within the polymer matrix.
Keywords
Ionic Conductivity; Polymer Composite Electrolytes; PEO; PMMA; Titanium Oxide;
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Times Cited By KSCI : 3  (Citation Analysis)
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