NONAQUEOUS ELECTROLYTE FOR CELL, AND NONAQUEOUS ELECTROLYTE CELL EQUIPPED WITH THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a nonaqueous electrolyte for a cell which surely gives cells with good performance and high safety even in a high temperature environment. SOLUTION: The nonaqueous electrolyte for a cell comprises nonaqueous solvent having a cyclic phosphazene compound represented by general formula (I):(NPR12)n, a difluorophosphoric acid ester compound represented by general formula (II), an alkyne compound represented by general formula (III):R3-C≡C-R4, and a supporting salt. In the formula (I), R1is a halogen element, an alkoxy group or an aryloxy group independently and n ranges from 3 to 4, In the formula (II), R2is an alkyl group, a cycloalkyl group, an alkenyl group, an alkoxy substitution alkyl group or an aryl group. In the formula (III), R3and R4are independently hydrogen, an alkyl group with a carbon number from 1 to 6 or an alkenyl or aryl group with a carbon number from 2 to 3. COPYRIGHT: (C)2008,JPO&INPIT