| 摘要 |
PROBLEM TO BE SOLVED: To provide a lithium secondary battery having superior battery characteristic such as cycle characteristic, electrical capacity and storage characteristic and having superior low temperature characteristic. SOLUTION: In a lithium secondary battery formed of a positive electrode, a negative electrode and a nonaqueous electrolyte formed by dissolving the electrolyte in the nonaqueous solvent, the positive electrode is made of the material containing the lithium compound oxide, and the negative electrode is made of a material containing graphite, and the nonaqueous solvent is mainly composed of ring carbonate and chained carbonate, and contains 0.01-10 wt.% of sultone derivative expressed with a formula (where in the formula, R1, R2, R3, R4, R5 and R6 respectively represents a separate alkyl group having 1-12 carbons, a cycloalkyl group having 3-6 carbons, an aryl group or hydrogen atom. (n) represents an interger of 0-2. When (n)=0 or (n)=1, at least one of R1-R6 means an alkyl group having 1-12 carbons, a cycloalkyl group having 3-6 carbons, or an aryl group). |
