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Electrolyte for high-voltage lithium ion battery and high-voltage lithium ion battery

A lithium-ion battery and electrolyte technology, which is applied in the field of high-voltage lithium-ion battery electrolyte and high-voltage lithium-ion batteries, can solve the problems that battery performance needs to be further improved, achieve excellent cycle performance, suppress battery gas production, and improve Effect of high temperature storage performance

Inactive Publication Date: 2017-02-15
GUANGZHOU TINCI MATERIALS TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] US Patent US 2008 / 0311481Al (Samsung SDI Co., Ltd) discloses an ether / aryl compound containing two nitrile groups, which can improve the inflation of the battery under high voltage and high temperature conditions, and improve the high temperature storage performance, and its battery performance needs to be further improved Improve

Method used

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  • Electrolyte for high-voltage lithium ion battery and high-voltage lithium ion battery
  • Electrolyte for high-voltage lithium ion battery and high-voltage lithium ion battery
  • Electrolyte for high-voltage lithium ion battery and high-voltage lithium ion battery

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preparation example Construction

[0038] In the preparation method of the high-voltage lithium-ion battery in this embodiment, the coating surface density is determined according to the capacity design of the battery (1640mAh) and the capacity of the positive and negative electrode materials. The positive electrode active material was purchased from Hunan Shanshan high-voltage lithium cobalt oxide material; the negative electrode active material was purchased from Jiangxi Zichen Technology. The positive electrode preparation steps, negative electrode preparation steps, electrolyte preparation steps, diaphragm preparation steps and battery assembly steps are described as follows;

[0039]The positive electrode preparation step is: mix the high-voltage positive electrode active material lithium cobaltate, conductive carbon black and binder polyvinylidene fluoride at a mass ratio of 96.8: 2.0: 1.2, and disperse them in N-methyl-2- Pyrrolidone, to obtain the positive electrode slurry, the positive electrode slurry...

Embodiment 2～18

[0052] Examples 2-18 and Comparative Examples 1-4 are the same as Example 1 except that the composition of solvent in the electrolyte, the composition and content of additives (based on the total weight of the electrolyte) are added as shown in Table 1. Table 1 shows the content of each component of the electrolyte additive and the battery performance test results. In the table, PP is propyl propionate, GBL is butyrolactone, EP is ethyl propionate, 1,3-PS is 1,3-propane sultone, AN is adiponitrile, SN is succinonitrile﹑DTD For vinyl sulfate. MA is maleic anhydride, 2-MA is 2-methylmaleic anhydride, and DMA is 2,3-dimethylmaleic anhydride.

[0053] Table 1

[0054]

[0055] Embodiment 6 compares with comparative example 1~3 as can be known, does not contain the comparative example 2 of formula 1 compound in the comparative example, or does not contain the comparative example 3 of ethylene glycol bis(propionitrile) ether or does not contain ethylene glycol bis In the compa...

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Abstract

The invention discloses an electrolyte for a high-voltage lithium ion battery and the high-voltage lithium ion battery. Additives of the electrolyte comprise ethylene glycol bis(propionitrile) ether and cyclic anhydride containing unsaturated double bonds; the electrolyte is used for the lithium ion battery, and can enable the lithium ion battery to maintain good cycle performance and high-temperature storage characteristic at high voltage.

Description

technical field [0001] The invention relates to the field of lithium battery preparation, in particular to an electrolyte solution for a high-voltage lithium-ion battery and a high-voltage lithium-ion battery. Background technique [0002] Lithium-ion battery is the most competitive battery of the new generation, known as "green energy", and is the preferred technology to solve contemporary environmental pollution and energy problems. In recent years, lithium-ion batteries have achieved great success in the field of high-energy batteries, but consumers still expect batteries with higher comprehensive performance, which depends on the research and development of new electrode materials and electrolyte systems. [0003] At present, electronic digital products such as smartphones and tablet computers have higher and higher energy density requirements for batteries, making it difficult for commercial lithium-ion batteries to meet the requirements. There are two ways to increase...

Claims

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Application Information

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IPC IPC(8): H01M10/0567H01M10/0525
CPCH01M10/0525H01M10/0567H01M2300/0025Y02E60/10
Inventor 占孝云仰永军万华平韩鸿波
Owner GUANGZHOU TINCI MATERIALS TECH
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