Abstract
A new gel polymer electrolyte has been prepared by entrapping a sufficient amount of non-aqueous lithium salt solution into a cross-linked polyethylene oxide (PEO) matrix. The morphology of this electrolyte was studied by both DSC and scanning electron microscopy, which revealed no crystallinity from -100o to 120oC and nearly a pore-free surface. Cyclic voltammetry was performed to obtain the electrochemical stability of the gel electrolytes, while an ionic conductivity of 1.826×10-3 S/cm was observed by complex impedance measurement. The flexible and strong texture of the matrix showed acceptable mechanical properties suitable for fabrication of secondary lithium-ion batteries.
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