Lg Energy Solution, Ltd.

Jongheon Kwak

Sung Soo Yoon

Jonghyun Chae

Kyung Oh Kim

Daeil Kim

Lucia Kim

Yeonju Lee

Jeongae Yoon

Sujee Kwon

A solid electrolyte composition for a lithium secondary battery including a fluorine-based polymer having grafted thereon a unit comprising alkylene oxide group and a crosslinkable functional group. The polymer may be formed by a process including grafting a monomer on a fluorine-based polymer, where the monomer includes alkylene oxide group and a crosslinkable functional group. Also disclosed is a solid electrolyte for a secondary battery formed by thermally curing the composition. By graft copolymerizing a monomer including alkylene oxide group and a crosslinkable functional group on a fluorine-based polymer having high lithium ion conductivity, the solid electrolyte is capable of providing a solid electrolyte for a secondary battery having significantly enhanced solid electrolyte ion conductivity and electrochemical stability.

Secondary battery solid electrolyte composition and solid electrolyte prepared therefrom

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Daejeon, South Korea

Jongheon Kwak