Electrolyte of lithium ion battery

A lithium-ion battery and electrolyte technology, applied in secondary batteries, circuits, electrical components, etc., can solve problems such as difficult lithium battery applications, achieve good low-temperature performance, and improve the effect of high-temperature inflation

Inactive Publication Date: 2012-07-18
FULLYMAX BATTERY CO LTD
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  • Abstract
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Problems solved by technology

At present, with the increasing attention to the environment and the damage to the environment by the existing automobile industry, it is imperative to find an alternative to petroleum as power. With the national eleventh and twelfth five-year plans Implementation, in terms of new energy vehicles, lithium polymer batteries will become the first choice to replace petroleum; however, according to the current technology of lithium batteries, it is difficult to wo...

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  • Electrolyte of lithium ion battery
  • Electrolyte of lithium ion battery

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Embodiment 1

[0012] An electrolyte solution for a lithium ion battery, including electrolyte, solvent and additive, wherein the solvent is a mixture of ethyl acetate EA, dimethyl carbonate DMC and ethylene carbonate EC. The weight percentage of ethyl acetate EA in the whole electrolyte solvent is 30-40%, the weight percentage of dimethyl carbonate DMC in the whole electrolyte solvent is 20-35%, and the weight percentage of ethylene carbonate EC is The weight percent content in the whole electrolyte solvent is 20-35%.

[0013] The additive is a mixture of propylene carbonate PC, lithium difluorooxalate borate LIODFB, polyoxyethyl ether and vinylene carbonate VC. The weight percentage of propylene carbonate PC in the whole electrolyte is 5%, and the weight percentage of difluorooxalate lithium borate LIODFB in the whole electrolyte is 3%,

[0014] The electrolyte is lithium hexafluorophosphate LiPF 6 . The concentration of the lithium hexafluorophosphate in the whole electrolyte is contro...

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Abstract

The invention belongs to the technical field of lithium ion batteries, particularly relates to electrolyte of the lithium ion batteries, and by weight, is composed of 13.5-18.5% of electrolyte, 66.5-78.5% of solvent and 8-15% of annexing agent. The solvent is composed of at least three of ethylene carbonate (EC), ethyl acetate (EA), propyl acetate (EP), dimethyl carbonate (DMC), methyl ethyl carbonate (EMC) and diethyl carbonate (DEC), the annexing agent is composed of at least three of vinylene carbonate (VC), 1,3 propane suhone (PS), difluoro oxalic acid lithium borate (LIODFB), propylene carbonate (PC), polyoxy diethyl ether and fluoro ethylene ester (FEC), and the electrolyte is lithium hexafluorophate (LiPF6). The electrolyte still has excellent performance at low temperature, and lithium ion batteries made of the electrolyte are excellent in low temperature discharge performance.

Description

technical field [0001] The invention belongs to the field of chemical industry, and in particular relates to an electrolyte solution of a lithium ion battery. Background technique [0002] Since lithium polymer batteries have a series of advantages over traditional lead-acid batteries (Lead-Acid Battery) and Ni-MH batteries (Ni-MH Battery), they have a series of advantages such as high energy density, long service life, no memory effect, and no pollution. With the development of lithium battery technology, lithium polymer batteries will gradually replace traditional batteries and be used in various fields. At present, with the increasing attention to the environment and the damage to the environment by the existing automobile industry, it is imperative to find an alternative to petroleum as power. With the national eleventh and twelfth five-year plans Implementation, in terms of new energy vehicles, lithium polymer batteries will become the first choice to replace petroleum...

Claims

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Application Information

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IPC IPC(8): H01M10/0567H01M10/0569H01M10/0568
CPCY02E60/12Y02E60/10
Inventor 袁卉军何信刘长昊
Owner FULLYMAX BATTERY CO LTD
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