Lithium ion battery composite electrolyte and lithium ion battery

A composite electrolyte and lithium-ion battery technology, applied in secondary batteries, secondary battery repair/maintenance, circuits, etc., can solve problems such as volatile, low conductivity, and flammability, and achieve stable electrochemical properties and flame retardancy Good performance and high conductivity

Active Publication Date: 2013-04-24
上海铂宝集团股份有限公司
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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 composite electrolyte and lithium ion battery
  • Lithium ion battery composite electrolyte and lithium ion battery
  • Lithium ion battery composite electrolyte and lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A lithium-ion battery composite electrolyte, its raw material composition and mass parts are: 35 parts of 1-ethyl-3-methylimidazole bis(trifluoromethylsulfonyl)imide salt, N-methyl-N-propane 35 parts of piperidine bis(trifluoromethylsulfonyl)imide salt, 1 part of ethylene carbonate, 1 part of propylene carbonate, 2 parts of diethyl carbonate, 2 parts of dimethyl carbonate, ethylene carbonate 1 part, 15 parts of lithium bis(trifluoromethylsulfonyl)imide.

[0020] Lithium iron phosphate is used as the positive electrode material, graphite is used as the negative electrode material, and Celgard 2300 microporous polypropylene membrane is used as the diaphragm to assemble the CR2032 button battery according to the ordinary process.

Embodiment 2

[0022] A lithium-ion battery composite electrolyte, its raw material composition and mass parts are: 45 parts of 1-ethyl-3-methylimidazole bis(trifluoromethylsulfonyl)imide salt, N-methyl-N-propane 45 parts of pyrrolidine bis(trifluoromethylsulfonyl)imide salt, 4 parts of ethylene carbonate, 6 parts of propylene carbonate, and 5 parts of lithium bis(trifluoromethylsulfonyl)imide.

[0023] Battery assembly is the same as in Example 1

Embodiment 3

[0025] A lithium-ion battery composite electrolyte, its raw material composition and mass parts are: 85 parts of 1-ethyl-3-methylimidazole bis(trifluoromethylsulfonyl) imide salt, 3 parts of propylene carbonate, carbonic acid 2 parts of vinylidene, 10 parts of lithium hexafluorophosphate.

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

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PUM

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Abstract

The invention discloses a lithium ion battery composite electrolyte and a lithium ion battery. The lithium ion battery composite electrolyte comprises 50-90 parts by mass of an ionic liquid, 1-10 parts of a film forming additive, and 5-20 parts of a lithium salt. The lithium ion battery prepared through using the lithium ion battery electrolyte has the advantages of high conductivity, good cycle performances, large rate charge and discharge specific capacity, wide use temperature range, and excellent safety.

Description

technical field [0001] The invention belongs to the technical field of chemical batteries, and in particular relates to a lithium-ion battery composite 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] Aiming at the deficiencies in the prior art, the object of the present invention is to provide a lithium-ion battery composite 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 conduct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0525H01M10/0566H01M10/0567H01M10/42
CPCY02E60/122Y02E60/10
Inventor 王少君刘华李飞
Owner 上海铂宝集团股份有限公司
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