NON-AQUEOUS ELECTROLYTE, METHOD OF PRODUCING NON- AQUEOUS ELECTROLYTE AND NON-AQUEOUS ELECTROLYTE LITHIUM SECONDARY BATTERY

摘要

PROBLEM TO BE SOLVED: To provide a non-aqueous lithium secondary battery having high safety and sufficient-level battery performance. SOLUTION: The non-aqueous electrolyte lithium secondary battery containing lithium salt uses a non-aqueous electrolyte as an electrolyte containing, dominantly, cold fused salt as a main constitutional component having imidazolium cation where the percentage content of the component to be vaporized and decomposed or carbonized at less than 300 deg.C is less than 3%.