Electrolyte for lithium secondary battery as well as preparation method and application of electrolyte

A lithium secondary battery and electrolyte technology, applied in secondary batteries, secondary battery repair/maintenance, organic electrolytes, etc., can solve the problem of reducing the ion conductivity of the positive electrode or even the electronic conductivity, short circuit of lithium dendrites in the negative electrode, and side reactions And other issues

Pending Publication Date: 2021-12-31
湖南法恩莱特新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In the process of improving the performance of organic lithium-ion batteries, there are some insurmountable technical difficulties, including: the side reaction of the electrolyte on the surface of the positive and negative electrodes, the short circuit and safety problems caused by the growth of lithium dendrites in the negative electrode, and the metal material of the positive electrode. Dissolution leads to failure of the electrolyte and its impact on the performanc

Method used

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  • Electrolyte for lithium secondary battery as well as preparation method and application of electrolyte
  • Electrolyte for lithium secondary battery as well as preparation method and application of electrolyte

Examples

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Effect test

Embodiment 1

[0067] This embodiment has prepared a kind of electrolyte solution for lithium secondary battery, and specific process is:

[0068] S1. Mix dioctyl phosphate with fluorobenzene, and control the process temperature to about 15°C;

[0069] S2. Lithium salt is mixed with dimethyl carbonate;

[0070] S3. Mix the mixture obtained in step S1, the mixture obtained in step S2 and vinylene carbonate again to obtain the product.

[0071] Table 1 shows the preparation raw materials and ratios of the electrolyte solution for lithium secondary batteries in this embodiment.

[0072] In this embodiment, the order of step S1 and step S2 can be exchanged arbitrarily.

Embodiment 2

[0074] This embodiment prepares a kind of electrolyte solution for lithium secondary battery, the specific difference with embodiment 1 is:

[0075] The specific preparation raw materials and proportions are slightly different, and the specific preparation raw materials are shown in Table 1.

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Abstract

The invention discloses an electrolyte for a lithium secondary battery as well as a preparation method and application of the electrolyte. The electrolyte for the lithium secondary battery comprises the following preparation raw materials: a solvent, which comprises dimethyl carbonate and fluorobenzene; an additive, wherein the additive comprises dioctyl phosphate; and a lithium salt. According to the electrolyte for the lithium secondary battery provided by the invention, the performance reduction of the secondary battery caused by dissolution of positive electrode material metal can be remarkably inhibited through the matching of the preparation raw materials.

Description

technical field [0001] The invention belongs to the technical field of secondary batteries, and in particular relates to an electrolyte solution for a lithium secondary battery and a preparation method and application thereof. Background technique [0002] In recent years, lithium secondary batteries have developed rapidly, and their types are becoming more and more diverse. Specifically, according to the type of negative electrode materials, they can be divided into lithium-ion batteries and lithium metal batteries; according to the types of positive electrode materials, they can be divided into lithium-sulfur batteries and lithium metal oxides. Batteries, etc.; according to the type of electrolyte, it can be divided into aqueous lithium-ion batteries, organic lithium-ion batteries, solid-state lithium-ion batteries, and gel lithium-ion batteries. Although there are more and more types of lithium secondary batteries, the most widely used and mature ones on the market are st...

Claims

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Application Information

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IPC IPC(8): H01M10/0567H01M10/0569H01M10/42H01M10/0525
CPCH01M10/0567H01M10/0569H01M10/4235H01M10/0525H01M2300/0028Y02E60/10
Inventor 邵俊华李海杰孔东波张利娟龚国斌王郝为郭飞闫国锋宋东亮王亚洲侯红歧韩飞
Owner 湖南法恩莱特新能源科技有限公司
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