| 摘要 |
PROBLEM TO BE SOLVED: To provide a lithium ion secondary battery with improved ion conductivity of an electrolyte and excellent high rate characteristics.SOLUTION: The lithium ion secondary battery contains, as an additive compound to an electrolyte, 0.1-10 mass% of at least one of compounds represented by chemical formula (1) and chemical formula (2) [R1 to R3 are C1-4 alkyl group; R4 to R7 are each H or a C1-4 alkyl group; and R8 and R9 are each a C1-4 alkyl group]. Preferably, the electrolyte further contains, as solvents, an annular carbide and a low viscosity solvent. |
