ADDITIVE FOR NON-AQUEOUS LIQUID ELECTROLYTE, NON-AQUEOUS LIQUID ELECTROLYTE AND LITHIUM SECONDARY BATTERY COMPRISING THE SAME

摘要

The present invention provides a non-aqueous electrolyte which comprises: an additive of an isocyanate-based compound including a non-aqueous organic solvent, a lithium salt, and a carbon-carbon triple bond; and the isocyanate-based compound including the carbon-carbon triple bond. When the additive of the isocyanate-based compound including the carbon-carbon triple bond is included in the non-aqueous electrolyte, a life span property and durability at high temperatures can be increased, and an internal resistance of a battery can be decreased.