COMPOSITION FOR FORMING POLYMERIC SOLID ELECTROLYTE WHICH PREVENTS ELECTROLYTE LEAKAGE AND HAS HIGH MECHANICAL STRENGTH AND ION CONDUCTIVITY, AND LITHIUM SECONDARY BATTERY USING POLYMERIC SOLID ELECTROLYTE FORMED THEREFROM

摘要

PURPOSE: Provided is a composition for forming a polymeric solid electrolyte which has high ion conductivity and excellent mechanical strength sufficient to be processed into a desired shape easily and is free from electrolyte leakage, and thus gives lithium secondary batteries having excellent mechanical and electrochemical properties. CONSTITUTION: The composition for forming a polymeric solid electrolyte comprises a polymerizable compound, a crosslinking agent, a polymerization initiator and a lithium salt, wherein the polymerizable compound and the crosslinking agent are a compound represented by the following formula 1 and a compound represented by the following formula 2, respectively. In formulae 1 and 2, R1 is H or CH3; each of R2 and R3 is independently selected from the group consisting of H, CH3, C2H5, propyl, dialkyl aminopropyl having the formula of -C3H6N(R')2, wherein R' is a C1-C5 alkyl and hydroxyethyl(CH2CH2OH); n1 is a number of 7-50; each of R4 and R5 is independently selected from H and CH3; and n2 is a number of 1-30.