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Novel compound and lithium secondary battery electrolyte containing it

A lithium secondary battery, secondary battery technology, applied in secondary batteries, lithium storage batteries, non-aqueous electrolyte storage batteries, etc., can solve the problems of high volatility and high flammability, and achieve improved expansion, higher discharge capacity, and higher capacity. The effect of recovery rate

Active Publication Date: 2018-04-20
SK ON CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these organic electrolytes are generally volatile and highly flammable, so when they are applied to lithium-ion secondary batteries, when internal heat is generated by overcharging or overdischarging, fires may occur due to internal short circuits. Safety issues at high temperatures

Method used

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  • Novel compound and lithium secondary battery electrolyte containing it
  • Novel compound and lithium secondary battery electrolyte containing it
  • Novel compound and lithium secondary battery electrolyte containing it

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0143] [Example 1] 5,5,6,6-tetramethyl-1,4-dioxane-2,3-dione (5,5,6,6-tetramethyl-1,4-dioxane-2, 3-dione, hereinafter, also referred to as 'PEA77') synthesis

[0144]

[0145] In a 100 ml round bottom flask, 2.36 g of pinacol (20 mmol) and 4.75 g of pyridine (60 mmol) were dissolved in 30 ml of tetrahydrofuran (THF), after which the temperature was lowered to 0°C. Under a nitrogen atmosphere, 3.05 g of oxalyl chloride (24 mmol) was slowly injected for 30 minutes, and then the temperature was raised to normal temperature. After reacting at normal temperature for 15 minutes, 30 ml of distilled water was added to complete the reaction. The organic layer was collected by two extractions with 20 ml of ethyl acetate, and, for several layers, washed once with 20 ml of 1N HCl solution, washed with 20 ml of saturated sodium bicarbonate (NaHCO 3 ) solution to wash once. Anhydrous magnesium sulfate (MgSO 4 ) after drying and concentrating the organic layer, the remaining solid was...

Embodiment 2

[0147] [Example 2] 6,6-dimethyl-[1,4]dioxepane-2,3-dione (6,6-dimethyl-[1,4]dioxepane-2,3-dione , hereinafter, also referred to as 'PEA79')

[0148]

[0149]In a 100ml round bottom flask, 2.08g of 2,2-dimethyl-1,3-propanediol (2,2-dimethyl-1,3-propanediol, 20mmol) and 4.75g of pyridine (pyridine, 60mmol) Dissolved in 30 ml of tetrahydrofuran (THF), after which the temperature was lowered to 0°C. Under a nitrogen atmosphere, 3.05 g of oxalyl chloride (24 mmol) was slowly injected for 30 minutes, and then the temperature was raised to normal temperature. After reacting at normal temperature for 15 minutes, 30 ml of distilled water was added to complete the reaction. The organic layer was collected by two extractions with 20 ml of ethyl acetate, and, for several layers, washed once with 20 ml of 1N HCl solution, washed with 20 ml of saturated sodium bicarbonate (NaHCO 3 ) solution to wash once. Anhydrous magnesium sulfate (MgSO 4 ) after drying and concentrating the organ...

Embodiment 3

[0151] [Example 3] 5,6-dioxy-1,4-dioxane-2,3-dicarboxylic acid (2R,3R)-diethyl ester ((2R,3R)-diethyl5,6-dioxo-1, 4-dioxane-2,3-dicarboxylate, hereinafter also referred to as 'PEA82') synthesis

[0152]

[0153] In a 100ml round bottom flask, 4.12g of diethyl-L-tartrate (diethyl-L-tartrate, 20mmol) and 4.75g of pyridine (pyridine, 60mmol) were dissolved in 30ml of tetrahydrofuran (THF), after The temperature was lowered to 0 °C. Under a nitrogen atmosphere, 3.05 g of oxalyl chloride (24 mmol) was slowly injected for 30 minutes, and then the temperature was raised to normal temperature. After reacting at normal temperature for 15 minutes, 30 ml of distilled water was added to complete the reaction. The organic layer was collected by extracting twice with 20 ml of ethyl acetate, and, after washing once with 20 ml of 1N HCl solution, the organic layer was washed once with 20 ml of saturated sodium bicarbonate (NaHCO 3 ) solution to wash once. Anhydrous magnesium sulfate (M...

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Abstract

The present invention provides a novel compound, a lithium secondary battery electrolyte containing it and a lithium secondary battery containing the lithium secondary battery electrolyte of the present invention, the high temperature stability and low temperature discharge capacity of the secondary battery electrolyte of the present invention And life characteristics are very excellent.

Description

technical field [0001] The present invention provides a novel compound and a lithium secondary battery electrolyte containing it, more specifically, relates to a novel compound that can be used as an additive for a lithium secondary battery electrolyte, a lithium secondary battery electrolyte containing the same, and A lithium secondary battery using such an electrolyte solution for a lithium secondary battery. Background technique [0002] Recently, with the wide spread of mobile electronic devices, and with the miniaturization, thinning and light weight of these mobile electronic devices, people are focusing on the miniaturization and weight reduction of secondary batteries used as their power sources, and the ability to make them Extensive research has been carried out on long-term charging and discharging. [0003] Lithium secondary batteries generate electrical energy through oxidation and reduction reactions when lithium ions are inserted and removed from the positive...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D319/12C07D321/08H01M10/0567
CPCC07D319/12C07D321/08H01M10/0567H01M10/052H01M10/0568H01M10/0569Y02E60/10
Inventor 金镇诚金喆禹吴承娟李光国李成日
Owner SK ON CO LTD
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