GEL POLYMER ELECTROLYTE COMPOSITION, GEL POLYMER ELECTROLYTE AND ELECTROCHEMICAL DEVICE COMPRISING THE SAME

摘要

A gel polymer electrolyte composition includes i) a compound acting as a monomer for forming gel polymer by polymerization and having at least two double bonds at an end thereof; ii) an electrolyte solvent containing carbonate and linear saturated ester; an electrolyte salt; and iv) a polymerization initiator. A gel polymer electrolyte formed using the above composition has excellent mechanical strength and lithium ion conductivity. A secondary battery containing the gel polymer electrolyte has improved room/low temperature characteristics and rate capacity.

主权项

1. A gel polymer electrolyte composition, comprising:
i) a compound acting as a monomer for forming gel polymer by polymerization and having at least two double bonds at an end thereof; ii) an electrolyte solvent containing carbonate and linear saturated ester; iii) an electrolyte salt; and iv) a polymerization initiator, wherein the compound having at least two double bonds at an end is a compound expressed by the following chemical FIG. 1: where A is alkylene of C1-C12 or haloalkylene of C1-C12; a is an integer of 0-30; B is H or methyl group; b is an integer of 2-6; X is where E1 to E4 are respectively hydrogen, alkyl group of C1-C12, haloalkyl group of C1-C12, or hydroxyalkyl group of C1-C12 independently, and m is an integer of 0-30.