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Lithium ion battery electrolyte and lithium ion battery

A lithium-ion battery and electrolyte technology, applied in secondary batteries, circuits, electrical components, etc., can solve the problems of low conductivity, volatile, flammable, etc., and achieve high conductivity, good flame retardancy, electrochemical stable effect

Inactive Publication Date: 2013-04-24
WUHU EVERSHINE AUTOMOTIVE COMPONENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional organic solvent carbonate electrolyte is volatile and flammable, which makes the safety issue the key to hinder the development of lithium-ion batteries. In addition, the organic solvent electrolyte has a narrow temperature range and low conductivity.

Method used

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  • Lithium ion battery electrolyte and lithium ion battery
  • Lithium ion battery electrolyte and lithium ion battery
  • Lithium ion battery electrolyte and lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A lithium ion battery electrolyte, its raw material composition and mass parts are: 70 parts of 1-ethyl-3-methylimidazole bis (trifluoromethylsulfonyl) imide salt, 15 parts of dimethyl carbonate, carbonic acid 15 parts of vinyl ester, the lithium salt in the electrolyte is lithium bis(trifluoromethylsulfonyl)imide, and its concentration is 0.4mol / L;

[0020] Use the above electrolyte, adopt lithium iron phosphate as the positive electrode material, graphite as the negative electrode material, and Celgard 2300 microporous polypropylene membrane as the diaphragm to assemble the CR2032 button cell according to the common process.

Embodiment 2

[0022] A lithium ion battery electrolyte, its raw material composition and mass parts are: 83 parts of 1-butyl-3-methylimidazole bis (trifluoromethylsulfonyl) imide salt, 5 parts of dimethyl carbonate, carbonic acid 5 parts of vinyl ester, 5 parts of diethyl carbonate, 0.8 parts of methyl ethyl phosphate, 1.2 parts of triethyl phosphate, the lithium salt in the electrolyte is lithium hexafluorophosphate and lithium tetrafluoroborate, the concentration is 0.3mol / L, 0.5mol / L L;

[0023] The battery assembly is the same as in Example 1.

Embodiment 3

[0025] An electrolyte solution for a lithium ion battery, the raw material composition and mass parts are: 40 parts of 1-ethyl-3-methylimidazole bis(trifluoromethylsulfonyl)imide salt, 1-butyl-3 methylbis 40 parts of (trifluoromethylsulfonyl) imine, 7 parts of dimethyl carbonate, 7 parts of diethyl carbonate, 1.5 parts of ethyl methyl phosphate, 3 parts of triethyl phosphate, 1.5 parts of trimethyl carbonate, electrolyte The middle lithium salt is lithium hexafluorophosphate, and its concentration is 1mol / L;

[0026] Battery assembly is the same as in Example 1

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Abstract

The invention discloses a lithium ion battery electrolyte and a lithium ion battery. The electrolyte comprises 60-85 parts by mass of an ionic liquid, 10-50 parts by mass of a carbonate solvent and 0-10 parts by mass of a phosphate fire retardant, and the concentration of a lithium salt in the electrolyte is 0.1-1.5mol / L. The lithium ion battery electrolyte overcomes the wide use temperature range disadvantage of a traditional organic solvent as a lithium ion battery electrolyte, and has the advantages of high conductivity, high ion transference number, high rate charge and discharge specific capacity, stable electrochemical properties during the use at a high temperature, and good fire retardation property.

Description

technical field [0001] The invention belongs to the technical field of chemical batteries, and in particular relates to a lithium-ion battery electrolyte and a lithium-ion battery. Background technique [0002] Lithium-ion battery has high energy density and high working voltage, and it is an energy storage device that has attracted extensive attention at present. However, the traditional organic solvent carbonate-based electrolyte is volatile and flammable, making safety the key to hindering the development of lithium-ion batteries. In addition, the use of organic solvent electrolytes has a narrow temperature range and low conductivity. Contents of the invention [0003] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a lithium ion battery electrolyte and a lithium ion battery. The lithium ion battery prepared by using the lithium ion battery electrolyte of the present invention has high electrical conductivity, good cycle ...

Claims

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Application Information

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IPC IPC(8): H01M10/0566
CPCY02E60/12Y02E60/10
Inventor 王少君刘华李飞
Owner WUHU EVERSHINE AUTOMOTIVE COMPONENT
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