A kind of lithium-ion battery high-voltage electrolyte additive and its electrolyte

An electrolyte additive, lithium-ion battery technology, applied in the direction of secondary batteries, circuits, electrical components, etc., to achieve the effects of improving compatibility, increasing high-voltage capacity and cycle life, and excellent comprehensive performance

Inactive Publication Date: 2016-08-17
SHENZHEN CAPCHEM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The main purpose of the present invention is to propose a high-voltage additive to improve the interface performance and compatibility between the positive electrode and the electrolyte, thereby effectively improving the lithium-ion battery. cycle life

Method used

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  • A kind of lithium-ion battery high-voltage electrolyte additive and its electrolyte
  • A kind of lithium-ion battery high-voltage electrolyte additive and its electrolyte

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The electrolyte is prepared in the BRAUN glove box, which is filled with argon gas with a purity of 99.999%, the moisture in the glove box is controlled at ≤5ppm, and the temperature is at room temperature. Mix 30 grams of EC, 70 grams of EMC, 1.5 grams of VC, 2.0 grams of 1,3-propene sultone and 0.2 grams of antipirin, then add LiPF6 and mix thoroughly to form a 1.0mol / L LiPF6 solution .

Embodiment 2

[0027] The electrolyte is prepared in the BRAUN glove box, which is filled with argon gas with a purity of 99.999%, the moisture in the glove box is controlled at ≤5ppm, and the temperature is at room temperature. Mix 30 grams of EC, 70 grams of EMC, 1.5 grams of VC, 2.0 grams of 1,3-propene sultone and 0.1 grams of antipirin, then add LiPF6 and mix thoroughly to form a 1.0mol / L LiPF6 solution .

Embodiment 3

[0029]The electrolyte is prepared in the BRAUN glove box, which is filled with argon gas with a purity of 99.999%, the moisture in the glove box is controlled at ≤5ppm, and the temperature is at room temperature. Mix 30 grams of EC, 70 grams of EMC, 1.5 grams of VC, 2.0 grams of 1,3-propene sultone and 0.5 grams of antipirin, then add LiPF6 and mix thoroughly to form a 1.0mol / L LiPF6 solution .

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Abstract

The invention belongs to the technical field of lithium-ion batteries, and relates to an additive for a non-aqueous high-voltage electrolyte of a lithium-ion battery and a high-voltage electrolyte for a lithium-ion battery containing the additive. The additive contains an unsaturated cyclic amide structure. The invention also discloses a lithium-ion battery high-voltage electrolyte containing the additive. The lithium-ion battery electrolyte additive and electrolyte of the invention can not only improve the compatibility between the electrolyte and the positive electrode material of the lithium-ion battery, but also effectively improve the battery capacity and cycle life performance of the lithium-ion battery under high voltage.

Description

technical field [0001] The invention belongs to the technical field of lithium-ion batteries, and relates to an additive for a non-aqueous high-voltage electrolyte of a lithium-ion battery and a high-voltage electrolyte for a lithium-ion battery containing the additive. Background technique [0002] Lithium-ion batteries have a history of more than 20 years since they were developed and commercialized by Sony Corporation of Japan in 1990. Due to its higher volume specific energy, weight specific energy and good environmental protection, it is gradually replacing traditional lead-acid batteries, Ni-Cd and MH-Ni batteries, and is widely used in portable 3C electronic devices such as mobile phones and notebook computers Among them, it quickly occupied a large market and developed rapidly. With the demand for smaller, lighter and thinner electronic products in recent years, in addition to pursuing lower prices, the pursuit of higher energy density has become a strong driving fo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/0567
CPCY02E60/10
Inventor 孙喜梅吴梅梅申海鹏胡学山顾红健
Owner SHENZHEN CAPCHEM TECH CO LTD
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