Nonaqueous electrolyte solution and lithium secondary...

H - Electricity – 01 – M

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H01M 10/40 (2006.01)

Patent

CA 2558290

Disclosed is a lithium secondary battery which is excellent in cycle characteristics, battery capacity and battery characteristics such as storage characteristics. A nonaqueous electrolyte solution for lithium secondary batteries wherein an electrolyte salt is dissolved in a nonaqueous solvent is characterized in that a formate compound having a specific structure is contained in the nonaqueous electrolyte solution in an amount of 0.01-10 weight% relative the nonaqueous electrolyte solution. A lithium secondary battery uses such a nonaqueous electrolyte solution.

Il est divulgué une batterie secondaire au lithium dont les caractéristiques de cycle, la capacité et des caractéristiques telles que les caractéristiques de stockage, sont toutes excellentes. Une solution électrolytique non aqueuse pour batteries secondaires au lithium dans laquelle un sel électrolytique est dissous dans un solvant non aqueux est caractérisée en ce qu~un composé de formiate présentant une structure particulière est présent dans la solution électrolytique non aqueuse dans une quantité de 0,01 à 10% en poids par rapport à la solution électrolytique non aqueuse. Une batterie secondaire au lithium utilise cette solution électrolytique non aqueuse.

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