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Electrolyte and lithium ion battery

A technology of electrolyte and lithium salt, which is applied in the field of electrolyte and lithium-ion batteries, can solve the problems of poor high-temperature cycle performance, poor performance of lithium-ion batteries, and poor rate performance, so as to improve wettability, kinetic performance and cycle performance. performance, the effect of reducing impedance

Active Publication Date: 2017-10-24
NINGDE AMPEREX TECH
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Problems solved by technology

[0003] At present, the electrolyte solution widely used in lithium-ion batteries includes lithium hexafluorophosphate as a conductive lithium salt and a mixture organic solvent of cyclic carbonate and chain carbonate. However, there are still many deficiencies in the above electrolyte, especially under high voltage, Lithium-ion batteries have poor performance, such as poor high-temperature cycle performance and poor rate performance

Method used

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  • Electrolyte and lithium ion battery
  • Electrolyte and lithium ion battery
  • Electrolyte and lithium ion battery

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Embodiment Construction

[0009] The electrolyte and lithium ion battery according to the present invention will be described in detail below.

[0010] First, the electrolyte according to the first aspect of the present invention will be explained.

[0011] The electrolyte according to the first aspect of the present invention includes a lithium salt, an organic solvent, and additives. The additives include fluorocarbon surfactants and silyl sulfate compounds.

[0012] In the electrolyte according to the first aspect of the present invention, the fluorocarbon surfactant is selected from one or more of the compounds represented by the following formula 1; wherein, x is an integer within 1-30, y is an integer within 1-30.

[0013] C 2 F 5 (CF 2 CF 2 ) x CH 2 CH 2 O(CH 2 CH 2 O) y H formula 1

[0014] In the electrolyte solution according to the first aspect of the present invention, preferably, x is an integer within 2-20.

[0015] In the electrolyte solution according to the first aspect of the present invention...

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Abstract

The invention provides an electrolyte and a lithium ion battery. The electrode comprises a lithium salt, an organic solvent and an additive, wherein the additive comprises a fluorocarbon surfactant and a silane-based sulfate compound. After the electrode is applied to the lithium ion battery, the rate performance and the cycle property of the lithium ion battery can be improved.

Description

Technical field [0001] The invention relates to the field of lithium batteries, in particular to an electrolyte and a lithium ion battery. Background technique [0002] In the rapidly developing information age, the demand for mobile phones, notebooks, cameras and other electronic products has increased year by year. As the working power source of electronic products, lithium-ion batteries have the characteristics of high energy density, no memory effect, and high working voltage. They are gradually replacing traditional Ni-Cd and MH-Ni batteries. However, with the expansion of UAV market demand and the development of power and energy storage equipment, people's requirements for lithium-ion batteries continue to increase, and the development of lithium-ion batteries with high energy density and rapid charging and discharging has become a top priority. At present, the effective method is to increase the voltage of the electrode material, the compaction density and choose the appr...

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Application Information

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IPC IPC(8): H01M10/0567H01M10/0525
CPCH01M10/0525H01M10/0567Y02E60/10
Inventor 王小梅付成华宋柯晟
Owner NINGDE AMPEREX TECH