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Electrolytic liquor, electrolyte, polymer electrolyte as well as preparation method and application thereof

A technology of electrolyte and electrolyte, which is applied in the field of polymer electrolyte, electrolyte, and electrolyte, and can solve problems such as high cost, low conductivity, and complicated preparation methods

Active Publication Date: 2017-05-31
SHANGHAI INST OF ORGANIC CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] The technical problem to be solved by the present invention is to provide a kind of electrolytic solution, electrolyte, polymer electrolyte, its preparation method and application

Method used

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  • Electrolytic liquor, electrolyte, polymer electrolyte as well as preparation method and application thereof
  • Electrolytic liquor, electrolyte, polymer electrolyte as well as preparation method and application thereof
  • Electrolytic liquor, electrolyte, polymer electrolyte as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0056] Add 402g of diethyl carbonate, 16.0g of lithium phosphate and 3.6g of lithium fluoride under the protection of nitrogen, stir at a temperature of 20 to 30°C, and after feeding 33.7g of boron trifluoride gas within 3 hours, continue at this temperature The mixture was stirred and reacted for 4 hours; the insoluble matter was removed by filtration, and the obtained filtrate was distilled off the solvent at a temperature of 60-70° C. by using a water pump to obtain 50.1 g of LiPBFO electrolyte. Its composition was determined to be 10.1% of boron content, 58.0% of fluorine content, 7.2% of lithium content, 8.0% of phosphorus content and 16.6% of oxygen content.

Embodiment 2

[0058] Under the protection of nitrogen, add 402g of diethyl carbonate, 16.0g of lithium phosphate and 7.2g of lithium fluoride, stir at a temperature of 20 to 30°C, and feed 33.7g of boron trifluoride gas within 2 hours, and continue to The reaction was stirred at high temperature for 6 hours; the insoluble matter was removed by filtration, and the obtained filtrate was distilled off the solvent by using a water pump under reduced pressure at a temperature of 60-70° C. to obtain 54.0 g of LiPBFO electrolyte. Its composition was measured as 9.4% of boron content, 59.0% of fluorine content, 8.4% of lithium content, 7.5% of phosphorus content and 15.5% of oxygen content.

Embodiment 3

[0060] Add 402g of diethyl carbonate, 16.0g of lithium phosphate and 10.7g of lithium fluoride under the protection of nitrogen, stir at a temperature of 20 to 30°C, and feed 51.9g of boron trifluoride gas within 5 hours. The reaction was stirred at high temperature for 3 hours; the insoluble matter was removed by filtration, and the obtained filtrate was distilled off the solvent by using a water pump at a temperature of 60-70° C. to obtain 75.4 g of LiPBFO electrolyte. Its composition was measured as 10.5% of boron content, 65.3% of fluorine content, 7.3% of lithium content, 5.4% of phosphorus content and 11.4% of oxygen content.

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Abstract

The invention discloses electrolytic liquor, electrolyte, polymer electrolyte as well as a preparation method and application thereof. A method for preparing LiPBFO electrolytic liquor in the invention comprises the following steps: reacting lithium phosphate, lithium fluoride and boron trifluoride gas in an organic solvent under the protection of protective gases, thereby obtaining the product, wherein a mass ratio of lithium fluoride to lithium phosphate is (0.01:1)is similar to(5:1), and a mass ratio of boron trifluoride to lithium phosphate is (0.8:1)is similar to (13:1). The electrolyte disclosed by the invention is high in conductivity and low in price, and the preparation method is simple.

Description

technical field [0001] The invention relates to an electrolytic solution, an electrolyte, a polymer electrolyte, a preparation method and application thereof. Background technique [0002] Lithium batteries were first invented by Edison as a type of batteries that use lithium metal and lithium alloys as negative electrode materials and use non-aqueous electrolyte solutions. Since lithium metal is very reactive, its applicability is limited. With the development and progress of science and technology, the types of lithium batteries have also increased. At this stage, there are mainly the following types of lithium batteries: batteries containing lithium metal, batteries containing lithium alloys, lithium ions, and lithium polymer batteries. Lithium batteries have the characteristics of thinness, small size, light weight and large capacity. [0003] During the charge and discharge process of lithium-ion batteries, the electrolyte solution or polymer gel electrolyte plays an ...

Claims

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Application Information

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IPC IPC(8): H01M10/0568H01M10/0565H01M10/0525
CPCH01M10/0525H01M10/0565H01M10/0568H01M2300/0082Y02E60/10
Inventor 肖吉昌林锦鸿赵艳格
Owner SHANGHAI INST OF ORGANIC CHEMISTRY - CHINESE ACAD OF SCI
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