High-temperature electrolyte for lithium-ion batteries

A lithium-ion battery and electrolyte technology, which is applied in the field of lithium-ion battery electrolyte materials, can solve problems such as not being able to meet market demand, and achieve the effects of good battery operation, high working voltage, and enhanced energy density

Active Publication Date: 2015-06-03
骆驼集团武汉光谷研发中心有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the tested parameters of 75°C for 6 days cannot meet the market demand in many cases.
For example, the high temperature of the car caused by the weather, in this case, the performance of the battery's pressure difference, thickness expansion rate and internal resistance growth rate needs to be further improved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The weight ratio of the components is 5% of lithium hexafluorophosphate, 2.5% of lithium bisborate, 2% of lithium difluorobisphosphate and 3% of lithium perchlorate. Ethylene carbonate 18%, dimethyl carbonate 12%, ethyl methyl carbonate 9.6%, propylene carbonate 24%, triphenyl phosphate 10.2% and trifluoromethyl ethylene carbonate 12%. 0.4% 1,4-butane sultone, 0.6% 1,3-propane sultone, 0.2% ethanolamine, 0.3% linear polyphosphazene and 0.2% cyclic phosphazene trimer. Mix well to make electrolyte solution.

Embodiment 2

[0019] The weight ratio of the components is 6% of lithium hexafluorophosphate, 2.5% of lithium difluorobisphosphate and 3% of lithium perchlorate. Ethylene carbonate 18%, dimethyl carbonate 14%, ethyl methyl carbonate 12.5%, propylene carbonate 20%, triphenyl phosphate 10.5% and trifluoromethyl ethylene carbonate 12%. 0.4% 1,4-butane sultone, 0.45% 1,3-propane sultone, 0.25% ethanolamine, 0.2% linear polyphosphazene and 0.2% cyclic phosphazene trimer. Mix well to make electrolyte solution.

Embodiment 3

[0021] The weight ratio of the components is 6.5% of lithium hexafluorophosphate, 3.5% of lithium bisborate and 3.5% of lithium perchlorate. Ethylene carbonate 15.2%, dimethyl carbonate 15%, ethyl methyl carbonate 14%, propylene carbonate 18%, triphenyl phosphate 11.8% and trifluoromethyl ethylene carbonate 11%. 0.4% 1,4-butane sultone, 0.2% 1,3-propane sultone, 0.3% ethanolamine, 0.3% linear polyphosphazene and 0.3% cyclic phosphazene trimer. Mix well to make electrolyte solution.

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PUM

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Abstract

The invention belongs to the technical field of electrolyte materials for lithium-ion batteries, and particularly relates to a high-temperature electrolyte for the lithium-ion batteries. The electrolyte comprises, in percentage by mass, 11.5%-13.5% of lithium salt, 85%-87% of an organic solvent and 0.8%-2% of an additive, wherein the lithium salt is lithium hexafluorophosphate; the organic solvent is a mixed solvent of ethylene carbonate, dimethyl carbonate, ethyl methyl carbonate and propylene carbonate; the additive is formed by mixing 1,4-butane sultone or 1,3- butane sultone and ethanolamine.

Description

technical field [0001] The invention belongs to the technical field of electrolyte materials for lithium ion batteries, and in particular relates to a high temperature electrolyte for lithium ion batteries. Background technique [0002] Lithium-ion batteries are widely used in the field of portable consumer electronics terminals due to their high energy density, high operating voltage, high output power, long cycle life, low self-discharge rate, no memory effect, and environmental friendliness. At present, lithium-ion batteries are being used in the field of energy and transportation, such as power vehicles, backup power supplies, and energy storage power stations, which put forward higher requirements for the energy density, cycle life, and safety performance of lithium-ion batteries. [0003] Lithium-ion rechargeable batteries, also known as lithium-ion secondary batteries or lithium-ion batteries, are advantageous due to their high capacity, long life, and absence of memo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0567H01M10/0566
CPCH01M10/0566H01M10/0567Y02E60/10
Inventor 张祖波阮华屹刘长来夏诗忠张行祥
Owner 骆驼集团武汉光谷研发中心有限公司
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