ORGANIC ELECTROLYTE SOLUTION CONTAINING CARBONATE HAVING CARBON-CARBON DOUBLE BOND, AND POLYMER ELECTROLYTE AND LITHIUM SECONDARY BATTERY PREPARED BY USING THE SOLUTION

摘要

PURPOSE: An organic electrolyte solution containing the carbonate having a carbon-carbon double bond, a polymer electrolyte prepared by using the electrolyte solution and a lithium secondary battery prepared by using the polymer electrolyte are provided, to inhibit the swelling of a battery due to the gas generated when it is leaved at a high temperature or it is charged or discharged and to reduce the internal resistance of a battery. CONSTITUTION: The organic electrolyte solution comprises a lithium salt; and a non-aqueous organic solvent which contains further 0.01-6 wt% of the carbonate having a carbon-carbon double bond to the total amount of an organic solvent. The polymer electrolyte comprises a polymer matrix containing pores; and the organic electrolyte solution infiltrated into the matrix. Also the gel-type polymer electrolyte comprises the organic electrolyte solution; and a heat polymerizable polymer or its monomer.