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Additive of lithium ion battery electrolyte and electrolyte containing same

A lithium-ion battery and electrolyte technology, applied in secondary batteries, circuits, electrical components, etc., can solve the problems of graphite structure damage and cycle performance degradation, and achieve the effects of reducing reduction decomposition, improving compatibility, and excellent overall performance.

Inactive Publication Date: 2010-03-31
SHENZHEN BAK BATTERY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Natural graphite anode materials have been widely used in actual production due to their high capacity characteristics, but in actual use of electrolytes containing propylene carbonate (PC), due to compatibility problems with natural graphite anode materials, the structure of graphite Vulnerable to damage, resulting in severe degradation of cycle performance

Method used

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  • Additive of lithium ion battery electrolyte and electrolyte containing same
  • Additive of lithium ion battery electrolyte and electrolyte containing same
  • Additive of lithium ion battery electrolyte and electrolyte containing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The electrolyte was prepared in a BRAUN glove box filled with argon gas with a purity of 99.99%, the moisture in the glove box was controlled at ≤5ppm, and the temperature was at room temperature. Mix 40g EMC, 60g PC, 1.0g VC, 1.0g AEC evenly, then add LiPF 6 Mix well to form 1.0mol / L LiPF 6 solution.

Embodiment 2

[0032] The electrolyte was prepared in a BRAUN glove box filled with argon gas with a purity of 99.99%, the moisture in the glove box was controlled at ≤5ppm, and the temperature was at room temperature. Mix 40g EMC, 60g PC, 1.0g VC, 2.0g AEC evenly, then add LiPF 6 Mix well to form 1.0mol / L LiPF 6 solution.

Embodiment 3

[0034] The electrolyte was prepared in a BRAUN glove box filled with argon gas with a purity of 99.99%, the moisture in the glove box was controlled at ≤5ppm, and the temperature was at room temperature. Mix 40g EMC, 60g PC, 1.0g VC, 4.0g AEC evenly, then add LiPF 6 Mix well to form 1.0mol / L LiPF 6 solution.

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Abstract

The invention discloses an additive of lithium ion battery electrolyte, containing allyl ethyl carbonate (AEC). The invention also discloses the lithium ion battery electrolyte containing the additive. The additive and electrolyte of the invention can improve the compatibility of propylene carbonate (PC) and the natural graphite cathode materials, thus effectively prolonging the cycle life of thelithium ion battery.

Description

technical field [0001] The invention relates to the technical field of lithium-ion batteries, in particular to an additive for an electrolyte of a lithium-ion battery and an electrolyte for a lithium-ion battery containing the additive. Background technique [0002] Since the large-scale production of lithium-ion batteries in the 1990s, it has rapidly occupied a large market due to its superior performance and diversity of shape processing that cannot be compared with other traditional secondary batteries (such as lead-acid batteries, nickel-metal hydride batteries and nickel-cadmium batteries). market and is developing rapidly. At present, it has been widely used in products such as mobile phones, notebook computers, PDAs, video cameras, digital cameras, mobile DVDs, MP3s and MP4s. Electric tools and electric bicycles powered by lithium-ion batteries are also a rapidly developing industry. Undoubtedly, in recent years, the basic research and applied research of lithium-ion...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/056
CPCY02E60/12Y02E60/10
Inventor 陈辉
Owner SHENZHEN BAK BATTERY CO LTD
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