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Non-aqueous electrolyte for inhibiting sodium-ion battery swelling as well as preparation method and application thereof

A non-aqueous electrolyte and sodium-ion battery technology, which is applied in the field of materials, can solve problems such as restricting development and battery flatulence cycle performance, and achieve the effects of suppressing flatulence, improving cycle performance and safety performance, and improving Coulombic efficiency

Inactive Publication Date: 2018-07-17
INST OF PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the shortcomings of the existing sodium-ion battery electrolyte side reactions causing battery flatulence and poor cycle performance have restricted its further development.

Method used

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  • Non-aqueous electrolyte for inhibiting sodium-ion battery swelling as well as preparation method and application thereof
  • Non-aqueous electrolyte for inhibiting sodium-ion battery swelling as well as preparation method and application thereof
  • Non-aqueous electrolyte for inhibiting sodium-ion battery swelling as well as preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment 1 of the present invention provides a non-aqueous electrolyte solution for suppressing flatulence of a sodium-ion battery, which consists of sodium salt, an organic solvent and functional additives.

[0035] Among them, the molecular formula of the functional additive is R1R2R3C 3 h 3 o 3 S, the structural formula is shown in formula 1

[0036]

[0037] Among them, R1, R2, R3 are respectively selected from hydrogen, alkyl, cycloalkyl, alkenyl, aryl or halogen; specifically, they can be selected from hydrogen atom, methyl, ethyl, propyl, butyl, pentyl, hexyl , isopropyl, isobutyl, sec-butyl, tert-butyl, cyclopropyl, cyclohexyl, vinyl, propenyl, phenyl, p-tolyl or halogen atoms.

[0038] The content of functional additives in the non-aqueous electrolytic solution is 0.001wt%-30wt%.

[0039] The sodium salt is sodium hexafluorophosphate, sodium tetrafluoroborate, sodium hexafluoroarsenate, sodium bisoxalate borate, sodium bistrifluoromethylsulfonylimide, ...

Embodiment 2

[0046] The present embodiment provides a kind of preparation method of the non-aqueous electrolytic solution that suppresses the flatulence of sodium-ion battery, and its steps are as follows figure 1 shown, including:

[0047] Step 110, adding a certain amount of sodium salt into the organic solvent to form a mixed solution;

[0048] Among them, sodium salts include sodium hexafluorophosphate, sodium tetrafluoroborate, sodium hexafluoroarsenate, sodium bisoxalate borate, sodium bistrifluoromethanesulfonylimide, sodium trifluoromethanesulfonate, bisfluorosulfonyl One or more of sodium amine or sodium perchlorate; the organic solvent includes one or more of cyclic carbonate, chain linear carbonate, carboxylate or cyclic lactone.

[0049] Step 120, adding 0.001wt%-30wt% functional additives to the mixed solution, and stirring evenly to obtain the non-aqueous electrolyte;

[0050] Among them, the molecular formula of the functional additive is R1R2R3C 3 h 3 o 3 S, the structur...

Embodiment 3

[0058] This example is used to illustrate the specific preparation method and function of the electrolyte solution provided by the present invention.

[0059] At room temperature, in a glove box, mix dimethyl carbonate and ethylene carbonate solvents at a volume ratio of 1:1, then add a certain amount of sodium hexafluorophosphate, and then add the functional additive 1,3-propanesulfone in different proportions ester, and stirred evenly to obtain a non-aqueous electrolyte solution.

[0060] Among them, the components of various materials are specifically referred to in Table 1. Through the above steps, three kinds of non-aqueous electrolyte solutions 1-3 in Table 1 were prepared by using different functional additives in different contents.

[0061]

[0062] Table 1

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Abstract

The invention discloses non-aqueous electrolyte for inhibiting sodium-ion battery swelling as well as a preparation method and application thereof. The non-aqueous electrolyte comprises a sodium salt,an organic solvent and a first functional additive, wherein the molecular formula of the first functional additive is R1R2R3C3H3O3S; the content of the first functional additive in the non-aqueous electrolyte is 0.001-30wt%; the sodium salt refers to one or more of sodium hexafluorophosphate, sodium tetrafluoroborate, sodium hexafluoroarsenate, sodium borate dioxalate, sodium ditrifluoromethyl sulfonamide, sodium trifluoromethanesulfonate, sodium difluorosulfonimide or sodium perchlorate; the organic solvent refers to one or more of cyclic carbonate, chain linear carbonate, carboxylic ester or cyclic lactone.

Description

technical field [0001] The invention relates to the field of material technology, in particular to a non-aqueous electrolytic solution for suppressing flatulence of a sodium-ion battery, a preparation method and application thereof. Background technique [0002] Since 1991, Japan's Sony Corporation has successfully used carbon materials as negative electrodes, LiCoO 2 After the commercialization of lithium-ion batteries with positive electrodes, lithium-ion batteries have revolutionized the face of consumer electronics due to their high energy density, high average output voltage, low self-discharge, excellent cycle performance, and environmental protection. So far, it still occupies the market of portable electronic devices, and is gradually being pushed to the field of electric vehicles and large-scale energy storage systems. However, since lithium resources are not abundant and are mainly distributed in South America, the price of lithium-ion batteries is too high for la...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0567H01M10/058H01M10/054H01M10/42
CPCH01M10/054H01M10/0567H01M10/058H01M10/4235H01M2300/0025Y02E60/10Y02P70/50
Inventor 胡勇胜戚兴国刘丽露陈立泉
Owner INST OF PHYSICS - CHINESE ACAD OF SCI
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