ELECTROLYTIC SOLUTION FOR NONAQUEOUS ELECTROLYTIC SOLUTION SECONDARY BATTERY AND NONAQUEOUS ELECTROLYTIC SOLUTION SECONDARY BATTERY

摘要

PPROBLEM TO BE SOLVED: To remedy a problem of degradation in preservation characteristics, especially, deterioration of battery performance under high temperature preservation conditions, of a secondary battery using nonaqueous system electrolytic solution containing a fluorinated aromatic compound as an additive. PSOLUTION: In the electrolytic solution for the nonaqueous electrolytic solution secondary battery containing a nonaqueous solvent and lithium salt and containing a fluorinated aromatic compound solely consisting of carbon, hydrogen, and fluorine as an additive, the content of the aromatic compound having halogens other than fluorine is 200 ppm or less to the fluorinated aromatic compound. PCOPYRIGHT: (C)2005,JPO&NCIPI