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Non-aqueous electrolytic solution for secondary battery, and secondary battery including same

A non-aqueous electrolyte and secondary battery technology, applied in the direction of non-aqueous electrolyte batteries, secondary batteries, non-aqueous electrolytes, etc., can solve the problems of poor high-temperature storage characteristics, etc., to suppress the reduction of capacity maintenance rate and improve high-temperature storage Excellent properties and preservation properties

Inactive Publication Date: 2017-09-26
STELLA CHEMIFA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, in Patent Document 1, the addition of vinylene carbonate is proposed. Although the improvement of storage characteristics is observed, there is a problem that the high-temperature storage characteristics are poor when stored in a high-temperature environment.

Method used

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  • Non-aqueous electrolytic solution for secondary battery, and secondary battery including same
  • Non-aqueous electrolytic solution for secondary battery, and secondary battery including same
  • Non-aqueous electrolytic solution for secondary battery, and secondary battery including same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0148]

[0149] In an argon atmosphere drying oven with a dew point below -70°C, use LiPF 6 The concentration is 1.0 mol / mole / Prepared in liters.

[0150] Next, to the above-mentioned mixed solvent, the above-mentioned lithium diethylphosphate was added so that the added concentration became 0.5% by mass, and the lithium disalicylate borate was added so that the added concentration became 0.5% by mass, so that the added concentration became 0.5% by weight. Add N,N-dimethylacetoacetamide in the same way. Thus, the non-aqueous electrolytic solution described in this example was prepared.

Embodiment 2

[0152] In this example, trimethyl borate was added instead of N,N-dimethylacetylacetamide in Example 1 in such a manner that the added concentration reached 0.5% by mass, and in the same manner as in Example 1, , to prepare the non-aqueous electrolyte solution of this embodiment.

Embodiment 3

[0154] In this example, bis[1,2'-benzenediol (2)-O,O']lithium borate was added in such a way that the concentration reached 0.5% by mass instead of the N,N-dimethyl The non-aqueous electrolytic solution of this example was prepared in the same manner as in Example 1 except for acetoacetamide.

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Abstract

Provided are: a non-aqueous electrolytic solution for a secondary battery, said solution exhibiting excellent storage characteristics even in high-temperature environments; and a secondary battery including said non-aqueous electrolytic solution. This non-aqueous electrolytic solution for a secondary battery comprises: at least one component (A) represented by general formula (1); a component (B) consisting of a boron complex salt represented by general formula (2); and at least one component (C) selected from the group consisting of boron complex salts represented by general formula (2) but different from the aforementioned boron complex salt, borate esters, acid anhydrides, cyclic carbonates having an unsaturated bond, cyclic carbonates including a halogen atom, cyclic sulfonate esters, and amines including an acetoacetyl group and represented by general formula (3).

Description

technical field [0001] The present invention relates to a non-aqueous electrolytic solution for secondary batteries exhibiting excellent high-temperature storage characteristics, and a secondary battery including the same. Background technique [0002] In recent years, in the field of application of secondary batteries including lithium secondary batteries, as applications have expanded from electronic devices such as mobile phones, computers, and digital cameras to automotive applications, improvements in output density, energy density, and capacity loss suppression have been promoted. Further high performance. For automotive applications, durability higher than conventional ones is required even when the operating environment temperature is on the high temperature side or on the low temperature side. Especially in a high-temperature environment, if the battery cell is enlarged, it will be constantly exposed to high temperatures not only due to the usage environment but al...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0567H01M10/052
CPCH01M10/052H01M10/0567H01M10/0568H01M10/0569Y02E60/10H01M2300/0025H01M10/0525H01M2300/0028
Inventor 坂口纪敬近壮二郎桂静郁西田哲郎
Owner STELLA CHEMIFA CORP
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