| abstract |
The present invention relates to a composition for a gel polymer electrolyte and a lithium secondary battery comprising the same and, more specifically, the purpose of the present invention is to provide a secondary battery in which an isocyanate-containing monomer is introduced to a composition for a gel polymer electrolyte so as to induce a urethane reaction with LiOH on the surface of a lithium transition metal oxide such that a coating layer including a urethane bond-containing oligomer is formed on the surface of the lithium transition metal oxide, thereby suppressing a side reaction due to HF in the battery, improving a capacity characteristic, and increasing an adhesive force between a cathode and a separation film so as to suppress a battery swelling phenomenon. |