High voltage resistant and high temperature resistant safety type electrolyte for lithium ion battery adopting manganese material as anode, and use thereof

A lithium-ion battery and electrolyte technology, which is applied in secondary batteries, circuits, electrical components, etc., can solve the problems of high temperature, safety and high-voltage resistance performance of lithium-ion batteries of manganese-based materials.

Active Publication Date: 2012-01-04
GUANGZHOU TINCI MATERIALS TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] None of the above-mentioned inventions solves the high temperature, safety and high voltage resistance of manganese-based lithium-ion batteries at the same time.

Method used

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  • High voltage resistant and high temperature resistant safety type electrolyte for lithium ion battery adopting manganese material as anode, and use thereof
  • High voltage resistant and high temperature resistant safety type electrolyte for lithium ion battery adopting manganese material as anode, and use thereof
  • High voltage resistant and high temperature resistant safety type electrolyte for lithium ion battery adopting manganese material as anode, and use thereof

Examples

Experimental program
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Embodiment 1

[0030] lithium salt LiPF 6Dissolved in the mixed solvent of ethylene carbonate / propylene carbonate / methyl ethyl carbonate / diethyl carbonate (mass ratio is 35 / 5 / 10 / 50) to obtain a solution, wherein LiPF 6 Accounting for 12.5% ​​of the total mass of the electrolyte, 2% of vinylene carbonate, 0.1% of ethanolamine, 2% of Li 2 B 12 f 8 h 4 And 8% fluoroanisole, get electrolyte solution of the present invention.

Embodiment 2

[0032] lithium salt LiPF 6 Dissolved in the mixed solvent of ethylene carbonate / fluoroethylene carbonate / ethyl methyl carbonate / diethyl carbonate (mass ratio is 30 / 10 / 10 / 50) to obtain a solution, wherein LiPF 6 Accounting for 10.5% of the total mass of the electrolyte, 3% of vinyl ethylene carbonate, 2% of 1,3-propane sultone, 0.1% of ethylenediamine, 1 % Li 2 B 12 f 7 h 5 and 5% fluorophenylene sulfide to obtain the electrolyte solution of the present invention.

Embodiment 3

[0034] lithium salt LiBF 4 Dissolved in the mixed solvent of ethylene carbonate / propylene carbonate / fluoromethyl ethyl carbonate / diethyl carbonate (mass ratio is 35 / 5 / 10 / 50) to obtain a solution, wherein LiBF 4 Accounting for 14.5% of the total mass of the electrolyte, 1% of vinylene carbonate, 1% of hexamethyldisilazane, 4% of Li 2 B 12 Cl 6 h 6 , 3% fluoroanisole and 3% fluorophenylene sulfide to obtain electrolyte solution of the present invention.

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PUM

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Abstract

The invention relates to high voltage resistant and high temperature resistant safety type electrolyte for a lithium ion battery adopting a manganese material as an anode, and a use thereof, specifically to high voltage resistant and high temperature resistant safety type electrolyte for a lithium ion battery adopting a manganese material as an anode. The electrolyte comprises a non-aqueous organic solvent, a lithium salt, a film forming additive and a stabilizing additive. The electrolyte further comprises: a high voltage resistant and high temperature resistant additive, wherein the high voltage resistant and high temperature resistant additive comprises one selected from Li2B12F12-XHX ( the X is an integer more than or equal to zero and less than or equal to 11), Li2B12Cl12-XHX (the X is an integer more than or equal to zero and less than or equal to 11), or a mixture formed through mixing the Li2B12F12-XHX and the Li2B12Cl12-XHX according to any ratio, the use amount of the high voltage resistant and high temperature resistant additive is 1-15% of the total mass of the electrolyte; a high voltage resistant overcharge-proof additive, wherein the high voltage resistant overcharge-proof additive comprises fluorinated anisole, fluorinated diphenyl sulfide or a mixture formed through mixing the fluorinated anisole and the fluorinated diphenyl sulfide according to any ratio, the use amount of the high voltage resistant overcharge-proof additive is 1-10% of the total mass of the electrolyte. With the present invention, the lithium ion battery adopting the manganese material has performances of high temperature resistance, safety and high voltage resistance, the charging voltage of the manganese material can be increased to more than 4.5 V.

Description

technical field [0001] The invention relates to a lithium-ion battery electrolyte, in particular to a high-voltage, high-temperature-resistant and safe electrolyte for a lithium-ion battery in which a manganese-based material is the positive electrode. Background technique [0002] Lithium-ion batteries are currently widely used in mobile communications, Digital cameras, MP3 and other portable electronic products, and gradually applied in national defense and military. In recent years, with the global emphasis on environmental issues and the rapid development of new energy vehicles, lithium-ion batteries are considered to be the most promising vehicle power batteries at present. [0003] With the development of the market and society, higher requirements are put forward for lithium-ion batteries. On the one hand, they require cheaper prices, and on the other hand, they require higher energy density. In terms of price, it is well known that the anode materials that have bee...

Claims

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Application Information

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IPC IPC(8): H01M10/0567H01M10/0525
CPCY02E60/122Y02E60/10
Inventor 周邵云刘建生张利萍郭守彬
Owner GUANGZHOU TINCI MATERIALS TECH
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