Nonaqueous electrolyte solution and lithium secondary battery using same

A non-aqueous electrolyte, lithium secondary battery technology, used in secondary batteries, circuits, electrical components, etc., to achieve the effect of excellent battery cycle performance
CN1934743AInactive Publication Date: 2007-03-21UBE IND LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
UBE IND LTD
Publication Date
2007-03-21
Estimated Expiration
Not applicable · inactive patent

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Abstract

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.
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Description

technical field

[0001] The present invention relates to a nonaqueous electrolytic solution and a lithium secondary battery using the nonaqueous electrolytic solution, and more particularly to a nonaqueous lithium secondary battery capable of providing excellent battery characteristics such as battery cycle performance, electric capacity and storage performance. An electrolytic solution, and relates to a lithium secondary battery using the nonaqueous electrolytic solution. Background technique

[0002] In recent years, lithium secondary batteries have been widely used as driving power sources for small electronic devices and the like. Such a lithium secondary battery is mainly composed of a positive electrode, a non-aqueous electrolyte, and a negative electrode, and specifically, in which a lithium composite oxide such as LiCoO 2 is used as the positive electrode and carbon material or lithium metal is used as the negative electrode. Non-aqueous electrolytic solutions used ...

Claims

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