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US 9,871,272 B2Granted
Secondary battery
AssigneeNEC Corporation
InventorsShinsaku Saitho, Hitoshi Ishikawa, Kazuhiko Inoue
Life of this patent
Estimating the term…
Abstract
The present invention relates to an electrolyte solution for a lithium secondary battery, which contains a sulfonate compound represented by a specific formula and carboxylic anhydride having one or more C═C double bonds, and a lithium secondary battery using the same.
Claims6
An electrolyte solution for a lithium secondary battery, comprising:
- a sulfonate compound represented by formula (1), and
- a carboxylic anhydride having one or more C═C double bonds;
- wherein R1 and R2 each independently represent an alkylene group having 1 to 5 carbon atoms,
- wherein the carboxylic anhydride having one or more C═C double bonds is maleic anhydride,
- wherein the sulfonate compound represented by formula (1) is methylene methanedisulfonate,
- wherein the total content of the sulfonate compound represented by formula (1) and the carboxylic anhydride having one or more C═C double bonds is 0.06 mol/L to 0.16 mol/L, and
- wherein the molar ratio of the sulfonate compound and the carboxylic anhydride having one or more C═C double bonds is 1:4 to 4:1.
4 more elements
A method for manufacturing a lithium secondary battery having an electrode element, an electrolyte solution, and an outer package, comprising:
- preparing an electrode element by arranging a positive electrode and a negative electrode to face to each other, and
- sealing the electrode element and a non-aqueous electrolyte solution containing a sulfonate compound represented by formula (1) and a carboxylic anhydride having one or more C═C double bonds in the outer package,
- wherein R1 and R2 each independently represent an alkylene group having 1 to 5 carbon atoms,
- wherein the carboxylic anhydride having one or more C═C double bonds is maleic anhydride,
- wherein the sulfonate compound represented by formula (1) is methylene methanedisulfonate,
- wherein the total content of the sulfonate compound represented by formula (1) and the carboxylic anhydride having one or more C═C double bonds is 0.06 mol/L to 0.16 mol/L, and
- wherein the molar ratio of the sulfonate compound and the carboxylic anhydride having one or more C═C double bonds is 1:4 to 4:1.
4 more elements
Dependencies are inferred from the claim text.