Electrolytic solution and secondary battery
AssigneeNEC Corporation
InventorsIkiko Shimanuki, Hitoshi Ishikawa, Noboru Yoshida
Life of this patent
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Abstract
The present invention relates to an electrolytic solution comprising a cyclic disulfonic acid ester represented by the specific formula and a cyclic dicarboxylic acid ester represented by the specific formula, and the secondary battery using the same. According to the present invention, the electrolytic solution which can improve a cycle characteristics in a secondary battery and a secondary battery using the same can be provided.
Claims14
An electrolytic solution for a secondary battery comprising:
- a nonaqueous solvent,
- a compound represented by the following formula (1), and
- at least one compound selected from the group consisting of a compound represented by the following formula (2), 1,4-dioxane-2,5-dione and 3,6-dimethyl-1,4-dioxane-2,5-dione,
- wherein in the formula (1),
- Q represents an oxygen atom, methylene group, or a single bond;
- A represents substituted or unsubstituted alkylene group having 1 to 5 carbon atoms, carbonyl group, sulfinyl group, substituted or unsubstituted fluoroalkylene group having 1 to 6 carbon atoms, or a group having 2 to 6 carbon atoms in which an alkylene unit or a fluoroalkylene unit is bonded through an ether bond;
- and
- B represents substituted or unsubstituted alkylene group that may be branched, substituted or unsubstituted fluoroalkylene group that may be branched, or an oxygen atom;
- wherein in the formula (2), R1 and R2 each independently represent a single bond or substituted or unsubstituted alkylene group having 1 to 5 carbon atoms that may be branched, with the proviso that both R1 and R2 do not represent single bonds at the same time.
A method for producing an electrolytic solution for a secondary battery, comprising dissolving in a nonaqueous solvent,
- a compound represented by the following formula (1), and
- at least one compound selected from the group consisting of a compound represented by the following formula (2), 1,4-dioxane-2,5-dione and 3,6-dimethyl-1,4-dioxane-2,5-dione,
- wherein in the formula (1),
- Q represents an oxygen atom, methylene group, or a single bond;
- A represents substituted or unsubstituted alkylene group having 1 to 5 carbon atoms, carbonyl group, sulfinyl group, substituted or unsubstituted fluoroalkylene group having 1 to 6 carbon atoms, or a group having 2 to 6 carbon atoms in which an alkylene unit or a fluoroalkylene unit is bonded through an ether bond;
- and
- B represents substituted or unsubstituted alkylene group that may be branched, substituted or unsubstituted fluoroalkylene group that may be branched, or an oxygen atom;
- wherein in the formula (2), R1 and R2 each independently represent a single bond or substituted or unsubstituted alkylene group having 1 to 5 carbon atoms that may be branched, with the proviso that both R1 and R2 do not represent single bonds at the same time.
Dependencies are inferred from the claim text.