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Lithium ion battery nonaqueous electrolyte and lithium ion battery

A lithium-ion battery and non-aqueous electrolyte technology, applied in non-aqueous electrolytes, battery electrodes, secondary batteries, etc., can solve the problems of battery high-temperature storage gas production, high-temperature cycle performance, etc., to improve high-temperature storage and high-temperature cycle Performance, performance improvement, and the effect of inhibiting oxidative decomposition

Active Publication Date: 2019-02-12
SHENZHEN CAPCHEM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a non-aqueous electrolyte solution for lithium-ion batteries, which aims to solve the problems of existing lithium-ion battery non-aqueous electrolytes such as high-temperature storage gas production and insufficient high-temperature cycle performance.

Method used

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  • Lithium ion battery nonaqueous electrolyte and lithium ion battery
  • Lithium ion battery nonaqueous electrolyte and lithium ion battery
  • Lithium ion battery nonaqueous electrolyte and lithium ion battery

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preparation example Construction

[0046] For the above-mentioned compounds 1-7, those skilled in the art can deduce their synthetic methods according to their structural formulas and according to the known knowledge. For example, the synthesis of compounds 1-4 is shown in reaction formula (1), and the reaction steps are as follows:

[0047] 1) Under the action of a basic catalyst, the corresponding polyhydric alcohol and dimethyl carbonate undergo a transesterification reaction to obtain a partially transesterified alcohol ester intermediate;

[0048] 2) The intermediate is reacted with acrylonitrile or acrylonitrile compound to obtain the crude product;

[0049] 3) The crude product is obtained after purification by column chromatography or the like.

[0050]

[0051] Compounds 5-6 can be synthesized by reacting compound 1 with an organic fluorinating agent SelectfluorTM to obtain crude products, which are then purified by column chromatography or the like.

[0052] The non-aqueous electrolyte solution f...

Embodiment 1

[0078] A 4.2V LiNi 0.5 co 0.2 mn 0.3 o 2 / artificial graphite battery, comprising a positive pole, a negative pole, a diaphragm arranged between the positive pole and the negative pole, and an electrolyte, wherein the electrolyte is a non-aqueous electrolyte, and the total amount of the non-aqueous electrolyte is The weight is 100%, containing the components shown in Table 1, Example 1, in mass percent.

Embodiment 2

[0080] A 4.2V LiNi 0.5 co 0.2 mn 0.3 o 2 / artificial graphite battery, comprising a positive pole, a negative pole, a diaphragm arranged between the positive pole and the negative pole, and an electrolyte, wherein the electrolyte is a non-aqueous electrolyte, and the total amount of the non-aqueous electrolyte is The weight is 100%, containing the components shown in Table 1, Example 2, in mass percent.

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Abstract

In order to solve the problems of gas generation during battery high-temperature storage, poor high-temperature cycle performance and the like of the existing lithium ion battery electrolyte, the invention provides lithium ion battery nonaqueous electrolyte. The lithium ion battery nonaqueous electrolyte contains a compound with the structure shown as a formula I shown in description, wherein in the formula I, R1, R2, R3 and R4 are respectively and independently selected from hydrogen atoms, fluorine atoms, cyano-groups, alkyl or halogenated alkyl with the carbon atom number being 1 to 5, oxygen-containing alkyl with the carbon atom number being 1 to 5 and silicon-containing alkyl with the carbo atom number being 1 to 5; X is a -O-R5-CN group; R5 is hydrocarbyl or halogenated alkyl with the carbon number being 1 to 5; m, n, z and y are an integer being 0 or 1; m+n+y+z is not equal to 0. When the nonaqueous electrolyte is used for the lithium ion battery, the decomposition of the electrolyte on the electrode surface can be inhibited; the high-temperature storage performance of the battery is improved; the generated gas is little; the expansion rate of the battery is small, so that the high-temperature cycle performance and the high-temperature storage performance of the lithium ion battery are effectively improved.

Description

technical field [0001] The invention belongs to the technical field of lithium-ion battery electrolytes, and in particular relates to a lithium-ion battery non-aqueous electrolyte and a lithium-ion battery. Background technique [0002] Lithium-ion batteries have made great progress in the field of portable electronic products because of their high operating voltage, high safety, long life, and no memory effect. Especially with the development of new energy vehicles, lithium-ion batteries have great application prospects in power supply systems for new energy vehicles. [0003] In non-aqueous electrolyte lithium-ion batteries, non-aqueous electrolyte is a key factor affecting the high and low temperature performance of the battery. In particular, the additives in the non-aqueous electrolyte are particularly important for the high and low temperature performance of the battery. During the initial charging process of the lithium-ion battery, the lithium ions in the positive ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0567H01M10/0525
CPCH01M10/0525H01M10/0567H01M10/0568H01M10/0569H01M2300/0025H01M4/525C07D317/36Y02E60/10
Inventor 郑仲天钟玲胡时光石桥陈长春邓朝晖
Owner SHENZHEN CAPCHEM TECH CO LTD
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