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Nonaqueous electrolyte additive, nonaqueous electrolyte, and nonaqueous electrolyte battery

A non-aqueous electrolyte and additive technology, applied in non-aqueous electrolyte batteries, non-aqueous electrolytes, electrolytes, etc., can solve problems such as unsatisfactory characteristics

Active Publication Date: 2020-04-24
CENT GLASS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] There are a variety of these non-aqueous electrolyte batteries that have been put into practical use, but the characteristics are still not satisfactory for various purposes

Method used

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  • Nonaqueous electrolyte additive, nonaqueous electrolyte, and nonaqueous electrolyte battery
  • Nonaqueous electrolyte additive, nonaqueous electrolyte, and nonaqueous electrolyte battery
  • Nonaqueous electrolyte additive, nonaqueous electrolyte, and nonaqueous electrolyte battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-1

[0163] (Preparation of Electrolyte)

[0164] As a non-aqueous solvent, use a mixed solvent of ethylene carbonate, dimethyl carbonate, and ethyl methyl carbonate in a volume ratio of 2.5:3:4.5, and LiPF as a solute 6 In such a way that the concentration is 1.0 mol / L, Li salt of the anion (1) as the above-mentioned ionic compound (based on the raw material before dissolving into the electrolytic solution, the Cl content in the ionic compound is 70 mass ppm, hydrogen fluoride An acid content of 120 mass ppm) was dissolved in the solvent at a concentration of 1.0 mass % relative to the total amount of the non-aqueous solvent, solute, and ionic compound to prepare a non-aqueous electrolyte solution No. Li(1)-1. The above preparation was performed while maintaining the liquid temperature in the range of 20 to 30°C. Table 1 shows the preparation conditions of the non-aqueous electrolytic solution.

[0165] (production of batteries)

[0166] Using the above electrolyte, the LiNi 0...

Embodiment 1-2～1-16、 comparative example 0、1-1～1-3

[0183] As shown in Table 1, except that the kind of anion of the counter-ionic compound was changed, the respective electrolyte solutions were prepared in the same procedure as that of the electrolyte solution No. Li(1)-1. In addition, in all the ionic compounds used in the following examples, the Cl content was 200 mass ppm or less, and the hydrofluoric acid content was 450 mass ppm or less.

[0184] In addition, electrolytic solution No. (0) was prepared in the same procedure as electrolytic solution No. Li(1)-1 except that the ionic compound of the present invention was not added.

[0185] In addition, except that the ionic compound of the present invention was not added and vinylene carbonate (hereinafter referred to as "VC") was added instead, the electrolyte solution No. (0)-VC-1.

[0186] In addition, instead of adding the ionic compound of the present invention, the Li salt of the following (17) and the Li salt of the following (18) are added as ionic compounds that d...

Embodiment 53-1

[0325] (Preparation of Electrolyte)

[0326] Use a mixed solvent of propylene carbonate, ethylene carbonate, and diethyl carbonate at a volume ratio of 2:1:7 as a non-aqueous solvent, and dissolve as a solute in this solvent so that the concentration becomes 1.0 mol / L NaPF 6 , dissolve the Na salt of the anion (2) as the above-mentioned ionic compound in a concentration of 0.5% by mass relative to the total amount of the non-aqueous solvent, solute, and ionic compound (based on the raw material before being dissolved in the electrolytic solution, the ion The Cl content in the compound was 20 mass ppm, and the hydrofluoric acid content was 110 mass ppm), and a non-aqueous electrolyte solution No.Na(2)-0.5[Na] was prepared. The above preparation was carried out while maintaining the liquid temperature at 25°C. Table 30 shows the preparation conditions of the non-aqueous electrolytic solution.

[0327] (production of batteries)

[0328] Using the above electrolyte, the NaNi ...

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Abstract

Provided is a nonaqueous electrolyte additive for a nonaqueous electrolyte battery that can exhibit a good balance of cycle characteristics at high temperatures of 50 DEG C or greater, and low temperature output characteristics of -20 DEG C or less. The nonaqueous electrolyte additive is represented by formula [1]. In formula [1], Z1 to Z4 are selected from fluorine atoms, C1-10 alkyl groups, C1-10 alkoxy groups, C2-10 alkenyl groups, C2-10 alkenyloxy groups, C2-10 alkynyl groups, C2-10 alkynyloxy groups, C3-10 cycloalkyl groups, C3-10 cycloalkyoxy groups, C3-10 cycloalkenyl groups, C3-10 cycloalkenyloxy groups, C6-10 aryl groups, and C6-10 aryloxy groups. These organic groups may also contain fluorine atoms, oxygen atoms, and unsaturated bonds, and at least one of Z1 to Z4 is a fluorine atom. Mp+ is a proton, a metal cation, or an onium cation, and p is the cation valence.

Description

technical field [0001] The present invention relates to an additive for a nonaqueous electrolyte, a nonaqueous electrolyte, and a nonaqueous electrolyte battery using the same, which can improve low-temperature characteristics and high-temperature durability in a well-balanced manner when used in a nonaqueous electrolyte battery. Background technique [0002] In recent years, information-related equipment or communication equipment, that is, small equipment such as personal computers, video cameras, digital cameras, and mobile phones, as well as power storage systems for applications requiring high energy density, auxiliary power supplies for electric vehicles, hybrid vehicles, and fuel cell vehicles Large-scale equipment such as , power storage, and power storage systems for applications that require energy are attracting attention. As one of its candidates, nonaqueous electrolyte batteries such as lithium ion batteries, lithium batteries, lithium ion capacitors, and sodium...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0567H01M10/052H01M10/054H01M10/0568H01M10/0569
CPCH01M10/0567H01M10/052H01M10/054H01M10/0525H01M10/4235H01M10/0568H01M10/0569Y02E60/10H01M2300/0025C07F9/065C07F9/5355H01M2300/004H01M4/131H01M4/133H01M2004/021H01M2004/027H01M2004/028
Inventor 森中孝敬岩崎进中原启太久保诚高桥幹弘
Owner CENT GLASS CO LTD