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Nonaqueous electrolytic solution containing monofluorophosphate salt and nonaqueous electrolytic solution battery using same

A technology of non-aqueous electrolyte and monofluorophosphate, which is applied in the direction of non-aqueous electrolyte batteries, non-aqueous electrolyte batteries, organic electrolyte batteries, etc., can solve the problem of low solubility and achieve the effect of inhibiting decomposition

Active Publication Date: 2019-12-10
KANTO DENKA IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the above-mentioned additives have low solubility to ethylene carbonate, propylene carbonate, dimethyl carbonate, diethyl carbonate, ethyl methyl carbonate, etc. that are generally used as non-aqueous solvents, so the amount that can be added is as low as 1%. It is difficult to say that it can fully exert its performance

Method used

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  • Nonaqueous electrolytic solution containing monofluorophosphate salt and nonaqueous electrolytic solution battery using same
  • Nonaqueous electrolytic solution containing monofluorophosphate salt and nonaqueous electrolytic solution battery using same
  • Nonaqueous electrolytic solution containing monofluorophosphate salt and nonaqueous electrolytic solution battery using same

Examples

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manufacture example 1

[0084] [Production Example 1] Production of lithium methyl monofluorophosphate

[0085] 7.6 g (0.18 mol) of lithium chloride, 25.0 g (0.16 mol) of phosphorus oxychloride, and 62.5 g of dimethyl carbonate were weighed into a 250 mL container made of PFA. Next, 2.9 g (0.16 mol) of pure water was dripped over 30 minutes, stirring at 10 degreeC under nitrogen sealing. After stirring for 30 minutes, 5.2 g (0.16 mol) of anhydrous methanol (water content 0.1%) was slowly added dropwise over 30 minutes while stirring. Furthermore, after stirring for 30 minutes, 34.3 g (0.24 mol in conversion of hydrogen fluoride) of 14% hydrogen fluoride dimethyl carbonate solution was added, and it stirred at 10 degreeC for 30 minutes. Thereafter, stirring was carried out at 120° C. for 1 hour while sealing with nitrogen. After heating at 120°C for 2 hours, the remaining solvent and reaction by-products were distilled off. Then, it was cooled to room temperature to obtain crude lithium methyl mono...

manufacture example 2

[0086] [Production Example 2] Production of lithium ethyl monofluorophosphate

[0087] 7.6 g (0.18 mol) of lithium chloride, 25.0 g (0.16 mol) of phosphorus oxychloride, and 62.5 g of diethyl carbonate were weighed into a 250 mL container made of PFA. Next, 2.9 g (0.16 mol) of pure water was dripped over 30 minutes, stirring at 10 degreeC under nitrogen sealing. After stirring for 30 minutes, 7.4 g (0.16 mol) of absolute ethanol (water content 0.5%) was slowly added dropwise while stirring for 30 minutes. Furthermore, after stirring for 30 minutes, 34.3 g (0.24 mol in conversion of hydrogen fluoride) of 14% hydrogen fluoride dimethyl carbonate solution was added, and it stirred at 10 degreeC for 30 minutes. Thereafter, stirring was carried out at 120° C. for 1 hour while sealing with nitrogen. After heating at 120°C for 2 hours, the remaining solvent and reaction by-products were distilled off. Then, it was cooled to room temperature to obtain crude ethyl monofluorophosphat...

manufacture example 3

[0088] [Production Example 3] Production of lithium hexyl monofluorophosphate

[0089] 7.6 g (0.18 mol) of lithium chloride, 25.0 g (0.16 mol) of phosphorus oxychloride, and 62.5 g of dimethyl carbonate were weighed into a 250 mL container made of PFA. Next, 2.9 g (0.16 mol) of pure water was dripped over 30 minutes, stirring at 10 degreeC under nitrogen sealing. After stirring for 30 minutes, 16.3 g (0.16 mol) of anhydrous n-hexanol was slowly added dropwise while stirring for 30 minutes. Furthermore, after stirring for 30 minutes, 34.3 g (0.24 mol in conversion of hydrogen fluoride) of 14% hydrogen fluoride dimethyl carbonate solution was added, and it stirred at 10 degreeC for 30 minutes. Then, it heated at 120 degreeC for 2 hours, and the remaining solvent and reaction by-products were distilled off. Then, it was cooled to room temperature to obtain crude lithium hexyl monofluorophosphate. As a result of purification treatment of the obtained crude product, a peak of li...

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Abstract

The present invention provides non-aqueous electrolytic solution for secondary battery and the non-aqueous electrolytic solution secondary battery that has used this non-aqueous electrolytic solution respectively, and this non-aqueous electrolytic solution for secondary battery contains for ethylene carbonate, propylene carbonate, The solubility of dimethyl carbonate, diethyl carbonate, ethyl methyl carbonate etc. is high, forms the electrolyte of coating film of good quality at positive electrode and negative electrode interface; Specifically, the present invention provides secondary battery non-aqueous electrolytic solution, It is characterized in that it contains a non-aqueous solvent containing a monofluorophosphate salt represented by the following general formula 1 or 2, and a lithium salt as a solute. The details of the general formula 1 or 2 are as described in this specification.

Description

technical field [0001] The invention relates to a novel nonaqueous electrolytic solution and a nonaqueous electrolytic solution secondary battery containing the nonaqueous electrolytic solution. In particular, it relates to a nonaqueous electrolytic solution containing a monofluorophosphate salt having a specific structure and a nonaqueous electrolytic solution secondary battery using the same. Background technique [0002] Currently, non-aqueous electrolyte secondary batteries such as lithium secondary batteries are widely used as power sources for relatively small electronic devices such as mobile phones, video cameras, digital cameras, and notebook personal computers. In addition, in recent years, due to environmental protection issues and energy issues, the development of low-cost and high-safety large-scale lithium secondary batteries for electric vehicles, power tools, and nighttime power is also being developed. will be further expanded. The performance requirements...

Claims

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Application Information

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IPC IPC(8): H01M10/0567H01M10/052H01M10/0568H01M10/0569H01M6/16
CPCH01M10/0568H01M10/0569H01M10/0525H01M2300/0025H01M10/0567Y02E60/10Y02T10/70
Inventor 阿部拓郎大前理
Owner KANTO DENKA IND CO LTD
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