| 초록 |
A single ion conductor with a cationic conduction can be realized by incorporation of the anion into the polymer chain. In this work, composite polymer electrolytes (CPEs) comprising of a poly(ethylene oxide) (PEO)-LiClO4 complex dispersed with Li-MMT were described. The results of the studies based on transmission electron microscopy (TEM), X-ray diffraction (XRD), differential scanning calorimetry (DSC), and impedance analysis were presented and discussed. As a result, a gradual decrease in the degree of crystallinity and in the size of the PEO spherullites was observed, as Li-MMT was added. The reduction in Tm of the CPEs due to interaction between the added Li-MMT and lithium cation seemed to be a main reason for the initial increase of the ionic conductivity with the increase in the Li-MMT. Also, the CPEs showed a conductivity of one order magnitude higher than that of the PEO/LiClO4 system as a consequence of the decrease in crystallinity after heating. |
