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Electrolyte and secondary battery

An electrolyte and electrolyte salt technology, used in secondary batteries, electrolyte battery manufacturing, non-aqueous electrolyte batteries, etc., can solve problems such as fire or explosion, thermal runaway, and hidden safety hazards of new energy vehicles, achieving high safety, reducing The effect of DC discharge resistance, excellent electrochemical performance

Active Publication Date: 2021-07-13
CONTEMPORARY AMPEREX TECH CO
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  • Abstract
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AI Technical Summary

Problems solved by technology

If the heat cannot be dissipated in time, the internal temperature of the battery will continue to rise, which will easily cause thermal runaway, and even cause safety accidents such as fire or explosion, which will bring great safety hazards to new energy vehicles.

Method used

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  • Electrolyte and secondary battery
  • Electrolyte and secondary battery
  • Electrolyte and secondary battery

Examples

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Embodiment Construction

[0012] The electrolytic solution and the secondary battery according to the present invention will be described in detail below.

[0013] First, the electrolytic solution according to the first aspect of the present invention will be described.

[0014] The electrolytic solution according to the first aspect of the present invention includes an electrolyte salt, an organic solvent and additives, and the additives include a first additive and a second additive with an oxidation potential of 4.5V-5.0V.

[0015] In the electrolyte solution of the first aspect of the present invention, the first additive is selected from one or more of the compounds shown in Formula 1. In Formula 1, the substituent R 1 , R 2 Each independently selected from C1-C10 alkyl, C1-C10 alkoxy, C2-C5 alkenyl, C2-C5 alkenyloxy, C2-C5 alkynyl, C2-C5 alkynyloxy, One of C6-C10 aryl and C6-C10 aryloxy, substituent R 3 One selected from C1-C10 alkyl, C2-C5 alkenyl, C2-C5 alkynyl, C6-C10 aryl, substituent R 1...

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Abstract

The invention provides an electrolytic solution and a secondary battery. The electrolytic solution includes an electrolyte salt, an organic solvent and an additive. The additives include a first additive and a second additive with an oxidation potential of 4.5V-5.0V. The invention can effectively improve the safety problem caused by overcharging of the secondary battery, reduce the DC discharge resistance of the secondary battery and improve the power performance of the secondary battery.

Description

technical field [0001] The invention relates to the field of batteries, in particular to an electrolyte and a secondary battery. Background technique [0002] In recent years, with the depletion of fossil energy and the increasingly serious global environmental pollution, new energy vehicles with rechargeable batteries as power systems have developed rapidly, among which power batteries stand out. The development of the new energy vehicle industry has higher and higher requirements on the energy density, power performance and safety of power batteries, which is a great challenge to traditional secondary batteries. [0003] In order to increase the energy density of the secondary battery, the preferred solution is to increase the gram capacity of the positive electrode material, and the ternary positive electrode material is the preferred solution. However, ternary materials generate a lot of heat when overcharged. If the heat cannot be dissipated in time, the internal temp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/0567H01M10/058
CPCH01M10/0567H01M10/058Y02E60/10Y02P70/50
Inventor 郇凤
Owner CONTEMPORARY AMPEREX TECH CO
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