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Nonaqueous electrolyte solution containing phosphonosulfonic acid compound, and lithium secondary battery

一种非水电解液、膦酰基磺酸的技术，应用在膦酰基磺酸化合物领域，能够解决不能获得电池低温放电特性改善电池保存特性改善等问题，达到保存特性改善、低温放电特性改善的效果

Active Publication Date: 2014-06-18
MITSUI CHEM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] However, there is a problem that, in a situation where it is considered that higher output power and longer life of the battery are required, it is not possible to achieve sufficient effects of simultaneously improving the low-temperature discharge characteristics of the battery and the improvement of the storage characteristics of the battery only by conventional technologies.

Method used

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  • Nonaqueous electrolyte solution containing phosphonosulfonic acid compound, and lithium secondary battery
  • Nonaqueous electrolyte solution containing phosphonosulfonic acid compound, and lithium secondary battery
  • Nonaqueous electrolyte solution containing phosphonosulfonic acid compound, and lithium secondary battery

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Embodiment

[0291] The following examples illustrate the present invention more specifically, but the present invention is not limited by these examples. It should be noted that, in the following examples, "%" or "wt%" means mass %.

[0292] Synthesis examples of phosphonosulfonic acid compounds represented by the general formula (I) are given below.

Synthetic example 1

[0294]

[0295] Dissolve methyl methanesulfonate (5.00g, 45.4mmol) in tetrahydrofuran (100ml), cool to -78°C, add dropwise n-butyllithium (1.6M hexane solution, 31ml, 49.9mmol), and at the same temperature Stir for 30 minutes. Next, diethyl chlorophosphate (3.9 ml, 27.2 mmol) was added dropwise, followed by stirring at -78°C for 1 hour and then at -50°C for 30 minutes. After adding saturated aqueous ammonium chloride solution to the reaction liquid and stirring, it was further diluted with water, and the diluted mixture was extracted twice with ethyl acetate. The combined extract (organic layer) was washed with water and saturated brine, dried over anhydrous magnesium sulfate, and concentrated. The obtained oil was purified by silica gel column chromatography (ethyl acetate / hexane system) to obtain 5.04 g (yield 75%) of methyl diethylphosphonomethanesulfonate (exemplary compound 10). The NMR measurement results of the obtained compound are as follows.

[0296] 1 H-NMR (2...

Synthetic example 2

[0298]

[0299] Methyl diethylphosphonomethanesulfonate (exemplary compound 10) (5.04 g, 20.5 mmol) was dissolved in dichloromethane (25 ml), and bromotrimethylsilane (10.8 ml, 80.9 mmol) was added at room temperature. After stirring at room temperature for 6 hours, the reaction solution was concentrated under reduced pressure to obtain trimethylsilyl bis(trimethylsilyl)phosphonomethanesulfonate (exemplary compound 23) (7.67 g, yield 95%). The NMR measurement results of the obtained compound are as follows.

[0300] 1 H-NMR (270MHz, CDCl 3 ) δ (ppm): 3.90 (2H, d, J = 18.4Hz), 0.36 (18H, s), 0.07 (9H, s).

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Abstract

The present invention provides a nonaqueous electrolyte solution which contains a phosphonosulfonic acid compound represented by general formula (I). (In general formula (I), each of R1, R2 and R3 independently represents a hydrogen atom, an alkyl group having 1-6 carbon atoms, a haloalkyl group having 1-6 carbon atoms, a phenyl group, a benzyl group, or a group represented by general formula (II); each of R4 and R5 independently represents a hydrogen atom, a halogen atom or an alkyl group having 1-6 carbon atoms; and n represents an integer of 1-6. In general formula (II), each of R6, R7 and R8 independently represents an alkyl group having 1-6 carbon atoms, a phenyl group or a benzyl group; m represents an integer of 0-2; and * represents a bonding position to an oxygen atom in general formula (I).)

Description

technical field [0001] The present invention relates to a nonaqueous electrolytic solution containing a phosphonosulfonic acid compound, a lithium secondary battery using the nonaqueous electrolytic solution, an additive for a lithium secondary battery containing a phosphonosulfonic acid compound, and a phosphonosulfonic acid compound. Acid compounds. Background technique [0002] In recent years, lithium secondary batteries have been widely used in electronic devices such as mobile phones and notebook computers, electric vehicles, and power sources for power storage. Especially recently, the demand for high-capacity, high-output, and high-energy-density batteries that can be mounted on hybrid vehicles and electric vehicles has rapidly expanded. [0003] A lithium secondary battery is mainly composed of a positive electrode and a negative electrode containing a material capable of storing and releasing lithium, and a non-aqueous electrolytic solution containing a lithium sa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0567C07F9/40H01M10/052
CPCC07F9/4075C07F9/65748C07F9/409C07F9/65742C07F9/3808H01M10/052Y02T10/7011C07F9/4006Y02E60/122H01M10/0567H01M2300/0025Y02E60/10Y02P70/50Y02T10/70
Inventor 三尾茂中村光雄野木荣信藤山聪子角田秀俊
Owner MITSUI CHEM INC
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