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

摘要

The present invention provides an additive for an electrolyte including lithium difluorophosphate (LiDFP), a vinylidene carbonate-based compound and a sultone-based compound. In addition, a non-aqueous electrolyte including the additive for an electrolyte and a lithium secondary battery including the non-aqueous electrolyte are provided. The lithium secondary battery including the additive for a non-aqueous electrolyte of the present invention has improved output properties at a low temperature, cycle properties at a high temperature, output properties after storing at a high temperature and swelling properties.