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Non-aqueous electrolyte and lithium ion battery containing same

A non-aqueous electrolyte and lithium-ion battery technology, applied in the field of electrolyte research, can solve the problems that batteries are prone to gas generation, affect battery storage and cycle life, and achieve the effect of suppressing battery flatulence and improving storage and cycle life

Inactive Publication Date: 2019-06-07
ZHUHAI COSMX BATTERY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during long-term storage and cycling of lithium-ion batteries, gas is easily generated inside the battery, which affects the storage and cycle life of the battery.

Method used

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  • Non-aqueous electrolyte and lithium ion battery containing same
  • Non-aqueous electrolyte and lithium ion battery containing same
  • Non-aqueous electrolyte and lithium ion battery containing same

Examples

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specific Embodiment approach 1

[0011] Specific embodiment one: what this embodiment records is a kind of non-aqueous electrolytic solution, comprises non-aqueous organic solvent, conductive lithium salt and additive, and described additive comprises negative electrode film-forming additive accounting for 0.1%~10% of total weight of electrolytic solution , accounting for 0.1% to 10% of the total weight of the electrolyte and a positive electrode film-forming additive accounting for 0.1% to 5% of the total weight of the electrolyte to suppress flatulence. The negative electrode film-forming additive includes vinyl vinylene carbonate (VEC), At least one of fluoroethylene carbonate (FEC), vinyl sulfate (DTD), 1,3-propane sultone (PS) and vinylene carbonate (VC); the positive electrode film-forming additive is At least one of nitrile compounds, phosphate ester compounds and boron-containing compounds; the flatulence suppressing additive is a silicon amine compound, having a chemical structural formula shown in fo...

specific Embodiment approach 2

[0014] Specific embodiment two: a kind of non-aqueous electrolytic solution described in specific embodiment one,

[0015] The chemical structural formula (I) is selected from any one of the following T1-T5 compounds;

[0016]

[0017] The chemical structural formula (II) is selected from any one of the following T6-T10 compounds;

[0018]

specific Embodiment approach 3

[0019] Specific embodiment three: a kind of non-aqueous electrolytic solution described in specific embodiment one, described anode film-forming additive is succinonitrile (SN), adiponitrile (ADN), 1,3,6-hexanetri Nitrile (HTCN), Tris(trimethylsilyl) phosphate (TMSB), Tris(trimethylsilyl) phosphite (TMSP), Allyl phosphate, Lithium difluorooxalate borate (LiODFB), Bisoxalate borate One or a mixture of lithium (LiBOB).

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Abstract

The present invention provides a non-aqueous electrolyte and a lithium ion battery containing the same, and belongs to the technical field of electrolyte research. The non-aqueous electrolyte comprises a non-aqueous organic solvent, a conductive lithium salt and an additive, the additive comprises based on the total weight of the electrolyte: 0.1-5% of an anode film formation additive, 0.1-10% ofa cathode film formation additive and 0.1-5% of a gas expansion inhibition additive, wherein the anode film formation additive comprises at least one of vinyl-vinylene carbonate, 4-Fluoro-1,3-dioxolan-2-one, Ethylene Sulfate, 1,3-propanesultone and vinylene carbonate; and the cathode film formation additive is at least one of nitriles, phosphate compounds and a boracic-like compound. The side reaction of the electrolyte and the electrode material in the storage and cyclic process of the battery is reduced, the battery gas expansion is inhibited so as to the storage and cycle lives of the battery are obviously improved.

Description

technical field [0001] The invention belongs to the technical field of electrolyte research, and in particular relates to a nonaqueous electrolyte and a lithium ion battery containing the electrolyte. Background technique [0002] Since the commercialization of lithium-ion batteries, due to its high specific energy and good cycle performance, it has been widely used in digital, energy storage, power, military aerospace and communication equipment and other fields. With the widespread application of lithium-ion batteries, consumers have higher requirements for battery storage and cycle life. However, during long-term storage and cycling of lithium-ion batteries, gas is easily generated inside the battery, which affects the storage and cycle life of the battery. This is because the electrolyte in the battery is prone to side reactions with the battery materials to generate gas. The non-aqueous electrolyte is the key factor affecting the performance of the battery. The optimi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0567H01M10/0525
CPCY02E60/10
Inventor 王海李素丽廖波李俊义徐延铭
Owner ZHUHAI COSMX BATTERY CO LTD
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