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Lithium ion battery electrolytic solution and lithium ion battery

A lithium-ion battery and electrolyte technology, applied in secondary batteries, circuits, electrical components, etc., can solve the problems of affecting the amount of lithium salt, affecting the battery rate performance of the electrolyte conductivity, and achieve the effect of good environmental performance

Inactive Publication Date: 2009-05-27
DONGGUAN SHANSHAN BATTERY MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the choice of organic solvent will also affect the amount of lithium salt that can be dissolved, thereby affecting the conductivity of the electrolyte and the rate performance of the battery

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A lithium-ion battery, the components of the lithium-ion battery electrolyte and the mass content of the components are: 80% of the organic capacitor, 15% of lithium hexafluorophosphate with a concentration of 1.2M, and 5% of the additive; wherein the organic capacitor is determined by the mass ratio It is composed of ethylene carbonate, dimethyl carbonate and ethyl acetate in a ratio of 10:12:5; the additive is composed of vinylene carbonate and biphenyl in a mass ratio of 2:3.

[0021] When manufacturing the above-mentioned lithium-ion battery electrolyte, the above-mentioned organic solvent, lithium hexafluorophosphate and additives can be sequentially added in a glove box filled with argon gas and the water vapor concentration is less than 10ppm, and then stirred evenly to obtain the lithium-ion battery of the present invention electrolyte.

Embodiment 2

[0023] A lithium-ion battery, the components of the lithium-ion battery electrolyte and the mass content of the components are: 80% organic solvent, 15% lithium hexafluorophosphate with a concentration of 1.2M, and 5% additives; wherein, the organic solvent consists of a mass ratio of 1 : 1 ethylene carbonate and dimethyl carbonate; the additive is composed of vinylene carbonate and biphenyl in a mass ratio of 2:3.

[0024] The manufacture of the lithium-ion battery electrolyte is similar to that of Example 1.

Embodiment 3

[0026] A lithium-ion battery, the components of the lithium-ion battery electrolyte and the mass content of the components are: 80% organic solvent, 15% lithium hexafluorophosphate with a concentration of 1.2M, and 5% additives; wherein, the organic solvent consists of a mass ratio of 1 :1 composed of ethylene carbonate and dimethyl carbonate; the additive is composed of vinylene carbonate, biphenyl and cyclohexylbenzene in a mass ratio of 2:3:1.

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PUM

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Abstract

The invention discloses a lithium ion battery electrolyte and a lithium ion battery. The lithium ion battery electrolyte comprises the following compositions by mass percentage: 13 to 15 percent of lithium salts, 75 to 82 percent of organic solvent and 3 to 7 percent of additive, wherein the organic solvent is one or more among ethylene carbonate, propylene carbonate, methyl ethyl carbonate, methyl propyl carbonate, dimethyl carbonate, diethyl carbonate, dipropyl carbonate, r-butyrolactone, tetrahydrofuran, acetonitrile, ethyl acetate, ethyl formate, propyl formate and sulfone organic substances; and the additive is one or more among vinylene carbonate, biphenyls, phenylcyclohexane, difluoromethyl methanamide and dimethyl acetamide. The lithium ion battery electrolyte meets the use requirement of a large-current discharge lithium ion battery and can meet the over-charging requirement of 3C10Vl; and the temperature on the surface of the battery is not raised under the condition of large-rate discharge.

Description

technical field [0001] The invention relates to a battery technology, in particular to a lithium-ion battery electrolyte and a lithium-ion battery containing the electrolyte. Background technique [0002] Lithium-ion batteries have the characteristics of high voltage, high specific energy, long cycle life, and no environmental pollution. They have been widely used in portable electronic devices such as mobile phones, notebook computers, and small cameras. As a power replacement product, it will also be widely used in the fields of electric vehicles, satellites and aerospace. [0003] However, the existing lithium-ion batteries are generally taboo for high-current discharge, especially when high-current discharge is performed under low temperature conditions, some problems such as low discharge capacity and temperature rise on the battery surface; Metal lithium is precipitated on the surface to form lithium dendrites, which leads to short circuit of the battery; some are eas...

Claims

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Application Information

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IPC IPC(8): H01M10/40H01M10/0525H01M10/0567H01M10/0569
CPCY02E60/122Y02E60/10
Inventor 侯涛汤敏敏陈柏源
Owner DONGGUAN SHANSHAN BATTERY MATERIALS
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