Electrolyte additive, non-aqueous electrolyte and lithium ion battery

An electrolyte additive, non-aqueous electrolyte technology, applied in secondary batteries, circuits, electrical components, etc., can solve the problems of corrosion of battery cathode materials, poor compatibility, insufficient energy density, etc., and achieve low-temperature cycle performance improvement and high-temperature cycling. The effect of performance improvement and high temperature storage performance improvement

Active Publication Date: 2021-09-07
ZHUHAI SMOOTHWAY ELECTRONICS MATERIALS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing common commercial lithium-ion cathode materials include lithium iron phosphate, lithium cobaltate, and nickel-cobalt-manganese ternary materials. Low, so the energy density is not high enough
[0003] As the market demand for high-energy-density lithium-ion batteries is increasing, increasing the charge cut-off voltage of positive electrode materials is an effective means to increase energy density, such as the commercial lithium cobalt oxide battery voltage 4.2V→4.35V→4.4V →4.45V→4.48V→4.5V, but there are also some problems in increasing

Method used

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  • Electrolyte additive, non-aqueous electrolyte and lithium ion battery
  • Electrolyte additive, non-aqueous electrolyte and lithium ion battery
  • Electrolyte additive, non-aqueous electrolyte and lithium ion battery

Examples

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Embodiment 1

[0039] In a nitrogen-filled glove box (O 2 2 (02 2 (0<1ppm), slowly add 20g of lithium hexafluorophosphate into the mixed solution, and mix well to make a non-aqueous electrolyte.

[0040] The non-aqueous electrolyte formulas of Examples 2-17 and Comparative Examples 1-7 are shown in Table 2, and the steps of preparing the non-aqueous electrolyte are the same as in Example 1.

[0041] Table 2 Non-aqueous electrolyte formula

[0042]

[0043]

[0044] Wherein TFSI is trifluoromethanesulfonamide, and its structural formula is as follows:

[0045]

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PUM

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Abstract

The invention discloses an electrolyte additive, a non-aqueous electrolyte and a lithium ion battery. The electrolyte additive comprises a compound shown as a formula A, wherein R is sulfonyl fluoride or trifluoromethylsulfonyl. The electrolyte additive is high in solubility and good in wettability, and the low-temperature cycle performance of the lithium ion battery can be greatly improved under the condition that impedance is not increased.

Description

technical field [0001] The invention belongs to the technical field of lithium-ion batteries, and in particular relates to an electrolyte additive, a non-aqueous electrolyte and a lithium-ion battery. Background technique [0002] Lithium-ion batteries are widely used in 3C digital products, power tools, electric vehicles, aerospace and other fields due to their high operating voltage, high energy density, long life, wide operating temperature range, and environmental friendliness. As people's requirements for batteries are getting higher and higher, thin and light and high energy density have become the development trend of batteries, especially for 3C digital products, such as mobile phone batteries, tablet computers and photography equipment. The existing common commercial lithium-ion cathode materials include lithium iron phosphate, lithium cobaltate, and nickel-cobalt-manganese ternary materials. Low, so the energy density is not high enough. [0003] As the market de...

Claims

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Application Information

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IPC IPC(8): H01M10/0567H01M10/0525
CPCH01M10/0567H01M10/0525Y02E60/10
Inventor 白晶毛冲王霹霹潘东优欧霜辉黄秋洁戴晓兵
Owner ZHUHAI SMOOTHWAY ELECTRONICS MATERIALS
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