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Lithium ion battery non-aqueous electrolyte and lithium ion battery

A lithium-ion battery and non-aqueous electrolyte technology, which is applied in the field of lithium-ion battery non-aqueous electrolyte and lithium-ion batteries, can solve the problems of not being able to well inhibit the dissolution of metal ions of ternary positive electrode materials, structure damage, oxidation catalysis, etc. To achieve the effects of inhibiting dissolution and precipitation, inhibiting excessive decomposition, and protecting current collectors

Pending Publication Date: 2022-03-18
SHANGHAI ROLECHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The object of the present invention is to provide a kind of non-aqueous electrolyte of lithium-ion battery and lithium-ion battery, through the design of non-aqueous electrolyte of lithium-ion battery, to solve the conventional film-forming additive that exists in the prior art can't well suppress ternary positive electrode Dissolution of material metal ions, destruction of structure and oxidation catalysis of positive electrode after detachment

Method used

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  • Lithium ion battery non-aqueous electrolyte and lithium ion battery
  • Lithium ion battery non-aqueous electrolyte and lithium ion battery
  • Lithium ion battery non-aqueous electrolyte and lithium ion battery

Examples

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Effect test

Embodiment 1

[0046] Lithium-ion battery non-aqueous electrolyte (sample 1)

[0047] In a glove box full of argon, (oxygen content ≤ 0.1ppm, water content ≤ 0.1ppm), configure an organic solvent, add lithium salt and additives to the organic solvent; according to the mass parts, organic solvent 74.5%, lithium salt is 22.5% and the additive is 3%, after stirring evenly, sample 1 is obtained.

[0048] Wherein, organic solvent is ethylene carbonate (EC), ethyl methyl carbonate (EMC) and diethyl carbonate (DEC); Ethylene carbonate (EC), ethyl methyl carbonate (EMC) and diethyl carbonate (DEC) The volume ratio is 30:50:20;

[0049] Lithium salts include lithium hexafluorophosphate (LiPF 6 ) and lithium tetrafluoroborate (LiBF 4 ), lithium hexafluorophosphate (LiPF 6 ) and lithium tetrafluoroborate (LiBF 4 ) The mass ratio is 12.5:1.5;

[0050] Additives are vinylene sulfate (DTD), lithium bisfluorosulfonyl imide (LiFSI), lithium difluorooxalate borate (LiODFB), fluoroethylene carbonate (FE...

Embodiment 2

[0076] Lithium-ion battery non-aqueous electrolyte (sample 2)

[0077] In a glove box full of argon, (oxygen content ≤ 0.1ppm, water content ≤ 0.1ppm), configure an organic solvent, add lithium salt and additives to the organic solvent; according to the mass parts, organic solvent 74.5%, lithium salt 22.5% and 3% additives, after stirring evenly, sample 2 was obtained.

[0078] Wherein, organic solvent is ethylene carbonate (EC), ethyl methyl carbonate (EMC) and diethyl carbonate (DEC); Ethylene carbonate (EC), ethyl methyl carbonate (EMC) and diethyl carbonate (DEC) The volume ratio is 30:50:20;

[0079] Lithium salts include lithium hexafluorophosphate (LiPF 6 ) and lithium tetrafluoroborate (LiBF 4 ), lithium hexafluorophosphate (LiPF 6 ) and lithium tetrafluoroborate (LiBF 4 ) The mass ratio is 12.5:1.5.

[0080] Additives are vinylene sulfate (DTD), lithium bisfluorosulfonyl imide (LiFSI), lithium difluorooxalate borate (LiODFB), fluoroethylene carbonate (FEC) and u...

Embodiment 3

[0085] Lithium-ion battery non-aqueous electrolyte (sample 3)

[0086]In a glove box full of argon, (oxygen content ≤ 0.1ppm, water content ≤ 0.1ppm), configure an organic solvent, add lithium salt and additives to the organic solvent; according to the mass parts, organic solvent 74.5%, lithium salt 22.5% and 3% additives, after stirring evenly, sample 3 was obtained.

[0087] Wherein, organic solvent is ethylene carbonate (EC), ethyl methyl carbonate (EMC) and diethyl carbonate (DEC); Ethylene carbonate (EC), ethyl methyl carbonate (EMC) and diethyl carbonate (DEC) The volume ratio is 30:50:20;

[0088] Lithium salts include lithium hexafluorophosphate (LiPF 6 ) and lithium tetrafluoroborate (LiBF 4 ), lithium hexafluorophosphate (LiPF 6 ) and lithium tetrafluoroborate (LiBF 4 ) The mass ratio is 12.5:1.5.

[0089] The additives are vinylene sulfate (DTD), lithium bisfluorosulfonyl imide (LiFSI), lithium difluorooxalate borate (LiODFB), fluoroethylene carbonate (FEC) an...

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Abstract

The invention relates to a lithium ion battery non-aqueous electrolyte and a lithium ion battery. Comprising a lithium salt, an organic solvent and an additive, and the additive comprises an unsaturated disiloxane compound. Through the design of the non-aqueous electrolyte of the lithium ion battery, the problems that in the prior art, a conventional film-forming additive cannot well inhibit metal ion dissolution of a ternary positive electrode material, structural damage and oxidation catalysis of the positive electrode after separation are solved.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a lithium-ion battery non-aqueous electrolyte and a lithium-ion battery. Background technique [0002] Lithium-ion batteries have the advantages of high energy density, long cycle life, and no memory effect, and have been widely studied and applied. In order to increase the energy density, it can be achieved by increasing the working voltage of the battery and finding positive and negative materials with high energy density, such as high-nickel ternary materials and silicon-carbon materials. The negative pole becomes an inevitable choice. With the increase of nickel content in the ternary material LiNi1-x-y-zCoxMnyAlzO2 (0≤x≤1, 0≤y≤1, 0≤z≤1, 0≤x+y+z≤1), its gram capacity gradually Increase. [0003] However, on the one hand, the increase in nickel content is prone to ion mixing during charging and discharging. The transition metal ionic liquid in the positive electrode will ...

Claims

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Application Information

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IPC IPC(8): H01M10/0567H01M10/0525
CPCH01M10/0567H01M10/0525H01M2300/0091
Inventor 陈英韬韩兆萌张阳
Owner SHANGHAI ROLECHEM CO LTD
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