Nonaqueous electrolyte solution, and nonaqueous electrolyte battery
A non-aqueous electrolyte and non-aqueous technology, which is applied in the direction of non-aqueous electrolyte batteries, non-aqueous electrolytes, electrolytes, etc., can solve the problems that the battery characteristics may not be satisfied, and achieve the effect of improving the capacity maintenance rate
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[0153]
[0154] The preparation method of the non-aqueous electrolyte solution of this disclosure is demonstrated. The nonaqueous electrolytic solution can be prepared by dissolving (II) a solute and (I) a salt compound represented by general formula (1) in (III) a nonaqueous organic solvent.
[0155] In the process of dissolving the (II) solute in the (III) non-aqueous organic solvent, it is effective to keep the liquid temperature of the non-aqueous organic solvent below 40° C. from the viewpoint of preventing deterioration of the non-aqueous organic solvent and the solute. This is because, when the solute is dissolved by keeping the liquid temperature below 40°C, the generation of free acids such as hydrogen fluoride (HF) generated by the reaction and decomposition of the solute with water in the system can be suppressed. Decomposition of water-organic solvents. In addition, from the viewpoint of suppressing the generation of free acids such as HF, it is also effective t...
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[0243] Hereinafter, the present disclosure will be described in more detail based on examples, but the present disclosure is not limited by these descriptions.
[0244] [Synthesis of Salt Compound Represented by General Formula (1)]
Synthetic example 1
[0245] [Synthesis Example 1: Synthesis of Salt Compound (1-1-Li)]
[0246] Into a 500 mL borosilicate glass reactor equipped with a stirrer, 50.1 g (404 mmol, 1 equivalent) of ethylene sulfate (manufactured by Tokyo Chemical Industry Co., Ltd.) and 101.3 g of ethyl methyl carbonate were added and stirred. After cooling this solution to 5° C., 22.3 g of lithium hydroxide (anhydrous, manufactured by Tokyo Chemical Industry Co., Ltd., 929 mmol, 2.3 equivalents) was added. Thereafter, stirring was carried out for 12 hours at 40° C., and the reaction solution was treated with 1 As a result of H-NMR analysis, it was confirmed that ethylene sulfate was not detected. Next, after cooling this solution to 5° C., 48.6 g (404 mmol, 1.0 equivalent) of oxychlorodifluorophosphorus was added over 1 hour, and then stirred at room temperature (20° C.) for 3 hours. The resulting reaction solution was filtered under reduced pressure, and the filtrate was concentrated in an evaporator at a tempe...
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