A lithium secondary battery containing a novel polyether-based polymer electrolyte

摘要

The present invention relates to a lithium secondary battery using a polymer electrolyte containing an alkaline salt and a plasticizer, wherein a polyether polymer containing a THF group is used as an electrolyte.;The polymer electrolyte having a THF group prepared according to the present invention is used in a lithium secondary battery to incorporate a THF ring in the polymer chain to lower the degree of crystallization of the polymer, thereby facilitating ion transport, thereby increasing ionic conductivity, It is possible to improve the life of the lithium secondary battery by improving the state of the surface stabilizing film occurring on the surface.