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Non-aqueous electrolytic solution for secondary battery and secondary battery

A non-aqueous electrolyte, secondary battery technology, applied in secondary batteries, non-aqueous electrolytes, organic electrolytes, etc., can solve the problems of reduced output characteristics, reduced driving performance, etc., and achieve the effect of excellent output characteristics

Active Publication Date: 2021-03-02
MITSUI CHEM INC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the DC resistance of the secondary battery is increased, there is a problem that the output characteristics are degraded, and thus the running performance of these automobiles is degraded.

Method used

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  • Non-aqueous electrolytic solution for secondary battery and secondary battery
  • Non-aqueous electrolytic solution for secondary battery and secondary battery
  • Non-aqueous electrolytic solution for secondary battery and secondary battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-1

[0126] [Production of non-aqueous electrolyte]

[0127] Dissolve 1.0 mol / L of LiPF in a mixed solvent obtained by mixing ethylene carbonate (EC) and ethyl methyl carbonate (EMC) at a volume ratio of 30:70 6 . Adding exemplified compound (25) ((3-methyl-2,4-pentanedione) oxalatoborate ((3-methyl-2,4-pentanedionato)oxalatoborate)) to this, the non-aqueous electrolytic liquid. The concentration of the exemplary compound (25) was 0.5% by mass.

[0128] [Production of secondary batteries]

[0129] Using the non-aqueous electrolyte prepared in the above manner, and the following positive electrode, negative electrode, and separator, the figure 1 The type of secondary battery shown.

[0130] -positive electrode-

[0131] LiCo containing as positive electrode active material was obtained 1 / 3 Ni 1 / 3 mn 1 / 3 o 2 93% by mass of lithium transition metal composite oxide, 3% by mass of acetylene black as a conductive additive, 4% by mass of polyvinylidene fluoride (PVDF) as a binde...

Embodiment 2-1、 comparative example 2-1～2-2

[0141] About Example 2-1 and Comparative Examples 2-1 to 2-2, it carried out similarly to Example 1-1 and Comparative Examples 1-1 to 1-2, respectively, and produced the nonaqueous electrolytic solution and the secondary battery.

Embodiment 3-1

[0143] [Production of non-aqueous electrolyte]

[0144] Dissolve 1.2mol / L LiPF in ethyl methyl carbonate (EMC) 6 . Fluoroethylene carbonate (FEC), 1,3-prop-1-ene sultone (PRS) and exemplary compound (25) were added thereto to obtain a nonaqueous electrolytic solution. The concentration of FEC was 7.5% by mass, the concentration of PRS was 2% by mass, and the concentration of Exemplary Compound (25) was 0.5% by mass.

[0145] [Production of secondary batteries]

[0146] Using the non-aqueous electrolytic solution produced as described above, a secondary battery was fabricated in the same manner as in Example 1-1.

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Abstract

A nonaqueous electrolytic solution for secondary batteries containing a boron compound represented by general formula (1). In general formula (1), R represents an alkyl group having 1 to 12 carbon atoms, an alkenyl group having 2 to 12 carbon atoms, or a group represented by general formula (2). In general formula (2), R 1 ~R 3 Each independently represents a hydrogen atom, a halogen atom, an alkyl group having 1 to 12 carbon atoms, an alkenyl group having 2 to 12 carbon atoms, or an aryl group having 6 to 12 carbon atoms. In general formula (2), * represents the bonding site with the oxygen atom in general formula (1).

Description

technical field [0001] The invention relates to a non-aqueous electrolytic solution for a secondary battery and the secondary battery. Background technique [0002] Secondary batteries using non-aqueous electrolytic solutions have been widely used as power sources for consumer electronics due to their high voltage, high energy density, and high reliability such as storage characteristics. In addition, secondary batteries using non-aqueous electrolytes have also begun to be used as batteries for power storage, and batteries for automobiles such as electric vehicles (EV), hybrid electric vehicles (HEV), and plug-in hybrid electric vehicles (PHEV). . A lithium battery and a lithium ion secondary battery are mentioned as a representative example of the secondary battery using a nonaqueous electrolytic solution. [0003] The non-aqueous electrolytic solution used in these secondary batteries is a solution obtained by mixing an electrolyte in a non-aqueous solvent, and the elect...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/0567
CPCH01M10/0525H01M10/0567H01M2300/0025Y02E60/10C07F5/04
Inventor 宫里将敬林刚史藤山聪子岸本显中川裕江
Owner MITSUI CHEM INC