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Electrolyte capable of being cured in presence of air or moisture as well as preparation method and application

A technology of electrolyte and moisture, which is applied in the field of electrolyte and preparation that can be cured when exposed to air or moisture, can solve problems such as electrolyte leakage, and achieve continuous leakage prevention, high weather resistance and water resistance, and long-lasting leak-proof The effect of liquid function

Active Publication Date: 2021-04-27
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem of electrolyte leakage has not been well solved in the prior art. If a more reliable electrolyte with anti-leakage function can be developed, especially to prevent the electrolyte from erupting and forming in the process of battery thermal runaway The smoke can prevent the possibility of the electrolyte contacting the air from igniting and burning from the source, which is expected to improve the safety of lithium-ion batteries

Method used

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  • Electrolyte capable of being cured in presence of air or moisture as well as preparation method and application
  • Electrolyte capable of being cured in presence of air or moisture as well as preparation method and application
  • Electrolyte capable of being cured in presence of air or moisture as well as preparation method and application

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preparation example Construction

[0048] In another embodiment, a method for preparing an electrolytic solution curable in the presence of air or moisture comprises the following steps:

[0049] (1) Dissolving the electrolyte in the solvent first, and then adding the functional additive to form a solution.

[0050] (2) Then add the multifunctional component curable in air or moisture, dissolve in the solution and mix evenly to prepare the electrolyte.

[0051] In yet another embodiment, an application of the electrolyte in batteries and capacitors. Preferably, the batteries and capacitors include lithium ions, sodium ions, potassium ions, zinc ions, aluminum ions, manganese ions and other monovalent or multivalent ion batteries or capacitors, for example, the batteries include lithium ion batteries, lithium- Sulfur batteries or other metal lithium batteries, sodium ion batteries, potassium ion batteries, zinc ion batteries, aluminum ion batteries, manganese ion batteries, etc.; said capacitors include lithium...

Embodiment 1

[0053] A kind of electrolytic solution that can be cured when encountering air or moisture is prepared by the following method:

[0054] Under anhydrous and oxygen-free conditions, the LiClO 4 Dissolve in the mixed solvent of dimethyl carbonate: ethyl methyl carbonate: ethylene carbonate = 1:1:1 (volume ratio) to form a solution of 1.5mol / L, and then add 1% of the mass of the solution to the solution SEI film-forming additives (such as vinylene carbonate (VC)), flame retardant additives (such as triphenyl phosphate isopropyl ester) accounting for 5% of the solution mass are mixed evenly, and then add 40% of the solution mass of hexamethylene The trimer of base diisocyanate is mixed uniformly to obtain an electrolyte solution. The prepared electrolyte can be used in batteries, supercapacitors and the like.

[0055] The mensuration of the ionic conductivity of the electrolytic solution of this embodiment:

[0056] The stainless steel disc is used as the counter electrode, the...

Embodiment 2

[0063] A kind of electrolytic solution that can be cured when encountering air or moisture is prepared by the following method:

[0064] Under anhydrous and oxygen-free conditions, bis-trifluoromethanesulfonimide lithium ((CF 3 ) 2 SO 2NLi) was dissolved in a mixed solvent of 1,3-dioxane (DOL): ethylene glycol dimethyl ether (DME) = 1:1 (volume ratio) to form a 1.0mol / L solution, and then poured into the solution Add 1% SEI film-forming additive (fluoroethylene carbonate (FEC)) of the solution mass, 5% of the solution mass of the flame retardant additive (triphenyl phosphate ethyl ester) and 5% of the solution mass of the flame retardant The high-voltage additive (bis(trimethylsilyl) 2-methyl-2-fluoromalonic acid) is mixed evenly, and then polyphenyl polymethylene polyisocyanate (PAPI) and 50% of the solution mass are added, Mix evenly to prepare electrolyte solution. The prepared electrolyte can be used in batteries and capacitors.

[0065] According to the same method o...

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Abstract

The invention discloses an electrolyte capable of being cured in the presence of air or moisture, a preparation method and application, The electrolyte comprises a polyfunctional group component capable of being cured in the presence of air or moisture, a solvent, an electrolyte and at least one functional additive, and in the electrolyte and the solvent, the concentration of the electrolyte is 0.1-10.0 mol / L; compared with the total mass of the electrolyte and the solvent, the mass fraction of the polyfunctional group component capable of being cured when meeting air or moisture is 1-60%, and the mass fraction of each functional additive is 0-5%. The electrolyte disclosed by the invention can realize high ionic conductivity and high safety of the battery at the same time.

Description

technical field [0001] The invention belongs to the field of preparation and application of electrolytic solutions, in particular to an electrolytic solution that can be cured when exposed to air or moisture, as well as its preparation method and application. Background technique [0002] Lithium-ion batteries are small and light-weight storage carriers with high energy density. The higher the energy density of the carrier, the greater the impact and the more prominent the safety problem in the event of an accident. Therefore, lithium-ion batteries are inherently unsafe. In recent years, safety accidents caused by combustion and explosion of lithium-ion batteries are not uncommon, so higher requirements are put forward for the safety of lithium-ion batteries. [0003] The safety of lithium-ion batteries and the properties of positive and negative electrode materials and electrolytes, the stability of the diaphragm, the structure of the battery cell, the production process,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0567H01M10/42H01M10/052H01M10/0525H01M10/054H01M10/36H01G11/64
CPCH01M10/0567H01M10/4235H01M10/052H01M10/0525H01M10/054H01M10/36H01G11/64H01M2300/0002H01M2300/0025Y02E60/10
Inventor 杨诚胡盛逾任汐
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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