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 conven

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

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0045] Example one

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

[0047] In a glove box filled with argon, (oxygen content is ≤0.1 ppm, water content is ≤0.1ppm), an organic solvent is disposed, and a lithium salt and additive are added to an organic solvent; according to a mass parts, an organic solvent 74.5%, lithium salt It was 3% of 22.5% and additives, and the sample 1 was obtained after stirring.

[0048] Among them, the organic solvent is a vinyl carbonate (EC), methyl carbonate (EMC) and diethyl carbonate (DEC); ethylene carbonate (EC), methyl carbonate (EMC), and diethyl carbonate (DEC) The volume ratio is 30:50:20;

[0049] Lithium salts include lithium hexafluorophosphate (LIPF 6 ) And tetrafluoroborate (LIBF 4 ), Lithium hexafluoro phosphate (LIPF 6 ) And tetrafluoroborate (LIBF 4 The mass ratio is 12.5: 1.5;

[0050] Additives are sulfate (DTD), diofluorosulfonimide (LiFsi), lithium dioxide (LiODFB), fluorocarbonate (FEC) and unsaturated silicone co...

Example Embodiment

[0075] Example 2

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

[0077] In a glove box filled with argon, (oxygen content is ≤0.1 ppm, water content is ≤0.1ppm), an organic solvent is disposed, and a lithium salt and additive are added to an organic solvent; according to a mass parts, an organic solvent 74.5%, lithium salt It was 3% for 22.5% and additives, and the sample 2 was obtained.

[0078] Among them, the organic solvent is a vinyl carbonate (EC), methyl carbonate (EMC) and diethyl carbonate (DEC); ethylene carbonate (EC), methyl carbonate (EMC), and diethyl carbonate (DEC) The volume ratio is 30:50:20;

[0079] Lithium salts include lithium hexafluorophosphate (LIPF 6 ) And tetrafluoroborate (LIBF 4 ), Lithium hexafluoro phosphate (LIPF 6 ) And tetrafluoroborate (LIBF 4 The mass ratio is 12.5: 1.5.

[0080] Additives are sulfate (DTD), diofluorosulfonimide (LiFsi), lithium dioxide (LiODFB), fluorocarbonate (FEC) and unsaturated silicone compound; sulfate ...

Example Embodiment

[0084] Example three

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

[0086]In an argon-filled glove box (oxygen content ≤0.1ppm, water content ≤0.1ppm), arranged organic solvent, a lithium salt and an additive added to the organic solvent; a mass parts, an organic solvent 74.5%, lithium salt 22.5%, and 3% additive, stir, sample 3 is obtained.

[0087] Wherein the organic solvent is ethylene carbonate (EC), ethylmethyl carbonate (EMC) and diethyl carbonate (DEC); ethylene carbonate (EC), ethylmethyl carbonate (EMC) and diethyl carbonate (DEC) the volume ratio of 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 ) Mass ratio of 12.5: 1.5.

[0089] Additives are ethylene sulfite (the DTD), bis-fluoro sulfonyl imide (LiFSI), lithium difluoro (oxalate) borate (LiODFB -), fluorinated ethylene carbonate (FEC) and an unsaturate...

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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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