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Silazane additive and lithium ion battery electrolyte prepared by using same and capable of preventing corrosion of steel shell

A lithium-ion battery, silazane technology, applied in the direction of secondary batteries, circuits, electrical components, etc., can solve the problems of wasting manpower and material resources, not found to prevent corrosion of steel shells, etc., and achieve the effect of good market prospects

Active Publication Date: 2013-11-20
DONGGUAN SHANSHAN BATTERY MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the erasure is not timely or the time interval between injection and cleaning is too long, corrosion will still inevitably occur, and a lot of manpower and material resources will be wasted
[0004] The existing lithium-ion battery electrolyte additives have the purpose of improving the cycle life and high and low temperature performance of lithium-ion batteries, but they have not been found to have the purpose of preventing corrosion of steel shells

Method used

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  • Silazane additive and lithium ion battery electrolyte prepared by using same and capable of preventing corrosion of steel shell
  • Silazane additive and lithium ion battery electrolyte prepared by using same and capable of preventing corrosion of steel shell

Examples

Experimental program
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Effect test

Embodiment 1

[0030] In a glove box filled with argon (moisture <10ppm, nutrient <1ppm), take 85.0% of the total mass of lithium-ion battery electrolyte to prevent steel shell corrosion and organically mix dimethyl carbonate, ethyl methyl carbonate, and ethylene carbonate. solution, the mass ratio of dimethyl carbonate, ethyl methyl carbonate, and ethylene carbonate is 1:1:1, add 2.0% of the total mass of vinylene carbonate to the mixed solution, slowly add 12.0% of the total mass to the mixed solution % lithium hexafluorophosphate, stirred until the lithium hexafluorophosphate was completely dissolved, and finally added 1.0% of the total mass of hexamethyldisilazane to the mixed solution to obtain the lithium-ion battery electrolyte for preventing corrosion of steel shells in Example 1.

Embodiment 2

[0032] In a glove box filled with argon (moisture <10ppm, nutrient <1ppm), take an organic mixed solution of ethyl methyl carbonate and ethylene carbonate, which accounts for 85.0% of the total mass of the lithium-ion battery electrolyte to prevent steel shell corrosion, The mass ratio of ester to ethylene carbonate is 7:3, and a mixture of 2.0% of the total mass of ethylene vinylene carbonate and 1,3-propane sultone is added to the mixed solution, ethylene vinylene carbonate, 1,3 -The mass ratio of propane sultone is 1:1, slowly add 12.0% of the total mass of lithium tetrafluoroborate to the mixed solution, stir until the lithium tetrafluoroborate is completely dissolved, and finally add 1.0% of the total mass to the mixed solution % of heptamethyldisilazane, 1,3-butyl-1,1,3,3-tetramethyldisilazane, 1,1,3,3-tetramethyl-1,3-di Mixture of vinylsilazane, heptamethyldisilazane, 1,3-dibutyl-1,1,3,3-tetramethyldisilazane, 1,1,3,3-tetramethyl- The mass ratio of 1,3-divinylsilazane ...

Embodiment 3

[0034] In a glove box filled with argon (moisture <10ppm, nutrient <1ppm), take dimethyl carbonate, diethyl carbonate, ethyl methyl carbonate, Propylene carbonate, ethylene carbonate organic mixed solution, the mass ratio of dimethyl carbonate, diethyl carbonate, methyl ethyl carbonate, propylene carbonate, ethylene carbonate is 1:1:1:0.5:1.5, in the mixed solution Add 1,4-butane sultone accounting for 2.0% of the total mass into the mixed solution, and slowly add 12.0% of the total mass of lithium bisoxalate borate, lithium difluorooxalate borate, bis(trifluoromethylsulfonyl ) lithium imide, the mass ratio of lithium bisoxalate borate, lithium difluorooxalate borate, lithium bis(trifluoromethylsulfonyl)imide is 1:2:1, stir until lithium bisoxalate borate, difluorooxalate The mixture of lithium borate and lithium bis(trifluoromethylsulfonyl)imide is completely dissolved, and finally, 1.0% of the total mass of tetramethyldisilazane, hexamethyldisilazane, heptamethyldisilazane a...

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Abstract

The invention specifically relates to a silazane additive and a lithium ion battery electrolyte prepared by using the same and capable of preventing corrosion of a steel shell, belonging to the technical field of additives for lithium ion battery electrolytes. The silazane additive provided by the invention is used as a steel shell corrosion inhibitor in the lithium ion battery electrolyte and can continuously react with moderately strong corrosive substances in the lithium ion battery electrolyte, thereby enabling the steel shell to maintain shining even after long time storage in the lithium ion battery electrolyte. The lithium ion battery electrolyte prepared by using the silazane additive and capable of preventing corrosion of the steel shell is directed at respective physicochemical characteristics of a solvent, a lithium salt and the additive and allows the solvent, the lithium salt and the silazane additive to perform respective advantages and mutually inhibit respective disadvantages after appropriate proportioning of the solvent, the lithium salt and the silazane additive; through the synergistic effect of the solvent, the lithium salt and the silazane additive, the anticorrosion effect of the lithium ion battery electrolyte provided by the invention is far better than that of conventional lithium ion battery electrolytes, and a preparation process for the lithium ion battery electrolyte is simple and easily practicable and has good market prospects.

Description

technical field [0001] The invention belongs to the technical field of electrolyte additives for lithium-ion batteries, and in particular relates to silazane additives and lithium-ion battery electrolytes prepared by using the silazane additives to prevent corrosion of steel shells. Background technique [0002] Lithium-ion batteries are widely used in various electronic devices due to their high energy density, low self-discharge rate, and environmental protection. In the production process of lithium-ion batteries, there will inevitably be residual electrolyte on the surface of the battery after liquid injection. If the electrolyte remaining on the surface of the battery cannot be wiped off in time or cannot be wiped clean, the battery will be taken out of the glove box and cleaned. When placed in an open environment, the residual electrolyte will quickly react with the air to form strong corrosive substances. The presence of strong corrosive substances will corrode the ap...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0567
CPCY02E60/12Y02E60/10
Inventor 丁祥欢朱智聪
Owner DONGGUAN SHANSHAN BATTERY MATERIALS
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