Korea Institute of Industrial Technology

Yong Pyo Lee

Ki Young Kim

Kyung Min Kim

Jun Woo Choi

Bong Sang Cho

Seong Kwan Kim

Ji San Jeong

Do Hyung Park

Sin Seok Oh

Jae Chui Lee

Disclosed is a polyalkylene glycol (PAG) polymer having urethane bonds, represented by Structural Formula 1 below.  The present invention further relates to a solid polymer electrolyte composition, composed of a polyalkylene glycol polymer having urethane bonds, and a lithium salt. The solid polymer electrolyte of the invention can exhibit superior compatibility, stability, flexibility, mechanical properties and ionic conductivity.

Polysilsesquioxane polyalkylene glycol polymer having urethane bonds, solid polymer electrolyte composition comprising the same and method of preparing the same

A solid polymer electrolyte includes a matrix prepared by subjecting an alkoxysilane compound having a urethane bond represented by Structural Formula 1 below and an alkoxysilane compound represented by Structural Formula 2 below to a sol-gel reaction; and a lithium salt dispersed in the matrix, and  The solid polymer electrolyte composition is configured such that silsesquioxane is linked to a polycarbonate diol-based polymer chain having a urethane bond. The solid polymer electrolyte exhibits superior compatibility, stability, flexibility, mechanical properties and ionic conductivity.

Solid polymer electrolyte comprising an alkoxysilane compound having a urethane bond, a method of preparing the electrolyte, and a lithium secondary battery including

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Cheongju-si, South Korea

Yong Pyo Lee