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A kind of anti-overcharge electrolyte and lithium ion battery using the electrolyte

A technology of electrolyte and dosage, which is applied in the field of lithium-ion battery materials to achieve good safety performance and excellent anti-overcharge performance

Active Publication Date: 2021-08-31
ZHUHAI COSMX BATTERY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the safety problems caused by overcharging and overdischarging of existing lithium-ion batteries, and provide a kind of anti-overcharging electrolyte and a lithium-ion battery using the electrolyte. The battery has excellent anti-overcharge performance, and has good safety performance, high and low temperature charge and discharge performance

Method used

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  • A kind of anti-overcharge electrolyte and lithium ion battery using the electrolyte
  • A kind of anti-overcharge electrolyte and lithium ion battery using the electrolyte
  • A kind of anti-overcharge electrolyte and lithium ion battery using the electrolyte

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preparation example Construction

[0043] The preparation method of the present invention will be further described in detail in conjunction with specific examples below. It should be understood that the following examples are only for illustrating and explaining the present invention, and should not be construed as limiting the protection scope of the present invention. All technologies realized based on the above contents of the present invention are covered within the scope of protection intended by the present invention.

[0044] The experimental methods used in the following examples are conventional methods unless otherwise specified; the reagents and materials used in the following examples can be obtained from commercial sources unless otherwise specified.

[0045] The structural formula of the compound shown in the formula 1 involved in the following examples and comparative examples is as follows:

[0046]

Embodiment 1

[0051] Mix the solvent ethylene carbonate / propylene carbonate / diethyl carbonate / propyl propionate in a mass ratio of 20:15:20:45, and add 0.8wt% T1, 0.5wt% to the mixture based on the total mass of the electrolyte % TMSB and 3wt% ADN were used as additives, and finally 1mol / L lithium hexafluorophosphate was added to obtain the electrolyte solution of Example 1.

[0052] The electrolyte solution was injected into the non-liquid-injected battery cell including the positive electrode sheet, the negative electrode sheet and the separator to make a lithium ion battery, and the battery of Example 1 was obtained.

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Abstract

The invention provides an anti-overcharge electrolytic solution and a lithium ion battery using the electrolytic solution. Include organic solvent, lithium salt and additive in described electrolytic solution, wherein, described additive comprises the sulfonyl imidazole compound shown in formula 1, anode protection additive and low resistance additive; Wherein, described anode protection additive is selected from nitrile Class compound; The low-impedance additive is selected from at least one of three (trimethylsilyl) borate (TMSB), ethylene sulfate, lithium difluorophosphate and lithium tetrafluoroborate; Electrolyte solution of the present invention The safety problem caused by overcharging and over-discharging of the existing lithium-ion battery can be well solved, and the lithium-ion battery using the electrolyte has excellent overcharging performance, good safety performance, and high-low temperature charging and discharging performance.

Description

technical field [0001] The invention belongs to the field of lithium-ion battery materials, and in particular relates to an anti-overcharge electrolyte and a lithium-ion battery using 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 wide application of lithium-ion batteries, the usage environment and demand of consumers for lithium-ion batteries continue to increase, which requires lithium-ion batteries to have the characteristics of both high and low temperature performance. At the same time, there are serious safety problems in the use of lithium-ion batteries. When the battery is overcharged, overdischarged or under some extreme use conditions, it is easy to cause safety hazards, fire or even explode. [0003] As an important part...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/0567H01M10/42H01M10/0525
CPCH01M10/0525H01M10/0567H01M10/4235H01M2300/0025Y02E60/10
Inventor 王龙母英迪王海李素丽李俊义徐延铭
Owner ZHUHAI COSMX BATTERY CO LTD