ELECTROLYTE ADDITIVE COMPOSITION, AS WELL AS ELECTROLYTE AND LITHIUM SECONDARY BATTERY COMPRISING THE SAME

An electrolyte additive composition of the present invention may improve high-rate charge and discharge characteristics and high-temperature storage and life characteristics of a lithium secondary battery when the electrolyte additive composition is used in an electrolyte while including a novel borate-based lithium compound as well as a non-lithiated additive.