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Lithium-ion battery electrolyte for ternary material battery

A lithium-ion battery, material battery technology, applied in secondary batteries, circuits, electrical components, etc., can solve the problems of poor safety performance and poor cycle performance of ternary material batteries, achieve excellent performance, unique film-forming performance, prevent The effect of thermal runaway

Active Publication Date: 2017-05-31
新乡华锐锂电新能源股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a lithium-ion battery electrolyte for ternary material batteries aiming at the defects of poor cycle performance and poor safety performance of ternary material batteries currently on the market

Method used

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  • Lithium-ion battery electrolyte for ternary material battery
  • Lithium-ion battery electrolyte for ternary material battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] 0.7 g of vinylene carbonate, 1.2 g of 1,3-propane sultone, 4 g of cyclohexylbenzene, 0.9 g of lithium bisfluorosulfonimide, 0.5 g of lithium bisoxalate borate and 11 g of lithium hexafluorophosphate were dissolved in 81.7 g of organic solvent ( Among them, 32g of ethylene carbonate, 7g of propylene carbonate, 20.6g of diethyl carbonate and 22.1g of ethyl methyl carbonate) were mixed uniformly to prepare a lithium-ion battery electrolyte.

Embodiment 2

[0016] Dissolve 0.7g of vinylene carbonate, 1.2g of 1,3-propane sultone, 3.4g of cyclohexylbenzene, 0.4g of lithium bisfluorosulfonimide, 0.4g of lithium bisoxalate borate and 11g of lithium hexafluorophosphate in 82.9g of organic solvent (31g of ethylene carbonate, 7g of propylene carbonate, 21g of diethyl carbonate and 23.9g of ethyl methyl carbonate), and mix uniformly to prepare lithium-ion battery electrolyte.

Embodiment 3

[0018] Dissolve 0.7g vinylene carbonate, 1.2g 1,3-propane sultone, 3.4g cyclohexylbenzene, 0.4g lithium bisfluorosulfonimide, 0.4g bisoxalate lithium borate and 11g lithium hexafluorophosphate in 82.9 organic solvent ( Wherein 26g ethylene carbonate, 6g propylene carbonate, 25.9g diethyl carbonate, 25g methyl ethyl carbonate), mix uniformly to prepare lithium ion battery electrolyte.

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Abstract

The invention discloses a lithium-ion battery electrolyte for a ternary material battery, belonging to the technical field of lithium-ion battery electrolytes. Technical scheme of the invention includes the following key points: the lithium-ion battery electrolyte for the ternary material battery comprises an organic solvent, lithium salt, and an additive, wherein the mass ratio of the organic solvent to the lithium salt to the additives is (80-87):(10.9-14):(1.9-2.5). With cyclohexyl benzene, imidodisulfuryl fluoride lithium and lithium bis(oxalato)borate added to the lithium-ion battery electrolyte in the invention, the performances of the battery in normal temperature cycle, high temperature cycle, full charge storage and overcharge tests are significantly improved.

Description

technical field [0001] The invention belongs to the technical field of lithium-ion battery electrolytes, and in particular relates to a lithium-ion battery electrolyte used for ternary material batteries. Background technique [0002] In recent years, due to the increase of smog, my country is currently paying close attention to energy and environmental issues. Under the pressure of energy and environmental protection, the country urgently needs the development and promotion of low-carbon, environmental protection, and renewable resources. With the support of automobiles, China's new energy automobile market has great potential. At present, most of my country's automobile power lithium batteries use lithium iron phosphate route, but due to the low specific capacity, tap density, compaction density and potential of lithium iron phosphate and the limitation of consistency, in recent years, my country's lithium battery technology routes have shown diversification Development, es...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0567H01M10/0525
CPCH01M10/0525H01M10/0567Y02E60/10
Inventor 吕秀夯孟小平
Owner 新乡华锐锂电新能源股份有限公司
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