LITHIUM SECONDARY BATTERY

摘要

Disclosed is a flame-retardant lithium secondary battery comprising a separator arranged between a positive electrode and a negative electrode, and a nonaqueous electrolyte solution containing a lithium salt. In this lithium secondary battery, the nonaqueous electrolyte solution uses an ionic liquid as a solvent, and the separator is composed of an electrically insulating porous inorganic membrane and a base. This lithium secondary battery has both excellent battery characteristics and high safety. The ionic liquid may contain a bis(fluorosulfonyl)imide anion as an anion component, and may contain a cation containing a nitrogen atom as a cation component.