| 초록 |
Electrolyte is one of the important components consisting of lithium secondary battery. As the form of electrolyte for lithium secondary battery, solid polymer electrolyte(SPE) is more safe in terms of explosion than liquid electrolyte. Also it can be applied for thin and flexible batteries and use lithium metal as an anode. Lithium ion in SPE exists as the form of solvation by polar group in polymer matrix. That is, the property of polymer matrix in SPE will affect the ionic conductivity. Then this study focused on the electrochemical property of poly(ethylene oxide)(PEO)-block-poly(propylene oxide)(PPO)-block-poly(ethylene oxide)(PEO) copolymer based SPE according to its morphology. For this, PEO-b-PPO-b-PEO copolymer based SPEs with various sizes of spherical micelles were prepared. And characterizations of PEO-b-PPO-b-PEO copolymer based SPEs were estimated by means of FT-IR, transmission electron microscope(TEM) and impedance analyzer. |
