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Nonaqueous electrolyte solution and nonaqueous electrolyte battery using same

A non-aqueous electrolyte, non-aqueous solvent technology, applied in non-aqueous electrolyte batteries, non-aqueous electrolytes, electrolytes and other directions, can solve the problems that have not yet reached a sufficient level, cannot fully suppress the increase in internal resistance of batteries, etc., and achieve good high rate Effects of Features

Active Publication Date: 2019-01-04
CENT GLASS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it has not yet reached a sufficient level
For example, in the non-aqueous electrolytic solution using ethylene carbonate as the main solvent, even in the case of using a non-aqueous electrolytic solution with 0.01 to 10.0% by mass of vinylene carbonate added relative to ethylene carbonate, the following Condition: In the case of storage at high temperature, the increase in the internal resistance of the battery cannot be sufficiently suppressed

Method used

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  • Nonaqueous electrolyte solution and nonaqueous electrolyte battery using same
  • Nonaqueous electrolyte solution and nonaqueous electrolyte battery using same
  • Nonaqueous electrolyte solution and nonaqueous electrolyte battery using same

Examples

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Embodiment

[0256] Hereinafter, the present invention will be described in more detail based on examples, but the present invention is not limited by these descriptions. In addition, Examples 1-1 to 1-41 may be collectively shown as Example 1 and the like, and each Example with a sub-number may be collectively shown. Examples and respective comparative examples and electrolyte No. after Example 2 may be described in the same manner.

[0257] Synthesis methods of difluoroionic complex (cis-isomer / trans-isomer) and tetrafluoroionic complex are shown below. Here, the ionic complex was synthesized by using the method disclosed in Patent Document 8, or by applying the methods disclosed in Non-Patent Document 1 and Patent Document 7, but it can also be synthesized by other methods.

[0258] The operation of any raw material or product is carried out under a nitrogen atmosphere with a dew point below -50°C. In addition, the glass reactor used was dried at 150 degreeC for 12 hours or more, and ...

Synthetic example 1

[0259] [Synthesis Example 1] Synthesis of (1a-Cis), (1a-Trans)

[0260] According to the method disclosed in Patent Document 7, tricoordinate lithium trioxalatophosphate was obtained as oxalic acid. Lithium trioxalophosphate (30 g, 99.4 mmol) was dissolved in dimethyl carbonate (hereinafter referred to as DMC) (120 mL), and hydrogen fluoride (hereinafter referred to as HF) (11.9 g, 596.4 mmol) was added. After stirring at 25°C for 48 hours, residual HF and DMC were removed under reduced pressure. Then, DMC (60 mL) was added to dissolve the concentration residue as much as possible, and then concentrated until the Li salt concentration became about 45% by mass. After removing insoluble components represented by oxalic acid by filtration, 49 g of a DMC solution containing a mixture of (1a-Cis) and (1a-Trans) was obtained.

[0261] To the DMC solution of the mixture was added dichloromethane (hereinafter referred to as "CH 2 Cl 2 ") and stirred for 12 hours, thereby precipita...

Synthetic example 2

[0264] [Synthesis Example 2] Synthesis of (5a-Tetra)

[0265] The reaction was carried out with reference to the method described in Patent Document 8. 20.0g (132m moles) of LiPF 6 110 mL of dimethyl carbonate (DMC) and 11.9 g (132 m moles) of oxalic acid were added to a glass flask having a capacity of 500 mL. At this time, although the LiPF 6 Completely dissolved, but most of the dissolved oxalic acid remained. Under stirring at 25°C, 13.4 g (79 m mole) of SiCl was added dropwise to the flask 4 After that, stirring was continued for 4 hours. Then, tetrafluorosilane and hydrochloric acid were removed under reduced pressure to obtain a crude DMC solution (purity: 91 mol%) mainly composed of an ionic complex (5a-Tetra).

[0266] This solution was concentrated until the Li salt concentration became about 50 mass %, and 51 g of concentrates were obtained. After removing insoluble components by filtration, CH was added at room temperature while stirring. 2 Cl 2 . After st...

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Abstract

The objective of the present invention is to provide: a nonaqueous electrolyte solution which is capable of exhibiting high output characteristics at low temperatures even when a battery has been usedto a certain extent, while exhibiting good high-rate characteristics at normal temperature, and which is also capable of similarly exhibiting a sufficient performance at low temperatures even after storage at high temperatures; and a nonaqueous electrolyte battery. A nonaqueous electrolyte solution for nonaqueous electrolyte batteries according to the present invention contains a nonaqueous solvent, an electrolyte which is dissolved in the nonaqueous solvent, (I) a difluoro ionic complex (1) represented by general formula (1), and (II) at least one compound selected from the group consistingof difluorophosphate salts, monofluorophosphate salts, salts having a specific imide anion, and specific silane compounds; and 95% by mole or more of the difluoro ionic complex (1) is a difluoro ioniccomplex (1-Cis) having a cis-type steric conformation represented by general formula (1-Cis).

Description

technical field [0001] The present invention relates to a nonaqueous electrolytic solution having excellent output characteristics at low temperature, and a battery using the nonaqueous electrolytic solution, such as a lithium secondary battery using the nonaqueous electrolytic solution. Furthermore, it relates to an additive useful as an additive of a non-aqueous electrolytic solution. Background technique [0002] In recent years, in addition to small and high energy density power storage systems for information-related equipment, communication equipment, personal computers, video cameras, digital cameras, mobile phones, smart phones, etc., they can be used as electric vehicles, hybrid vehicles, fuel Demand for high-capacity, high-output, and high-energy-density batteries that are used as auxiliary power supplies for battery vehicles is rapidly expanding. In addition, there is a growing demand for batteries that can be used for a long period of time even in large-scale, p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0567H01M2/16H01M4/38H01M4/46H01M4/48H01M4/485H01M4/505H01M4/525H01M4/58H01M4/587H01M10/052H01M10/0568H01M10/0569C07C55/07C07F7/08C07F7/12C07F1/02H01M50/417H01M50/429
CPCH01M4/485H01M4/505H01M4/525H01M4/587H01M10/0567H01M10/0568H01M4/386H01M4/5825H01M10/0525H01M4/387H01M2300/0025Y02E60/10H01M50/4295H01M50/44H01M50/429H01M50/417H01M10/0569H01M10/4235C07F7/08C07F7/12C07F1/02C07C55/07H01M2300/0037H01M10/0563H01M50/411H01M2300/002
Inventor 板桥沙央梨铃木克俊高桥干弘武田一成
Owner CENT GLASS CO LTD
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