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Lithium ion battery electrolyte and preparation method and application thereof

A lithium-ion battery and electrolyte technology, applied in secondary batteries, circuits, electrical components, etc., can solve the problems of poor low-temperature discharge retention rate, short cycle life, and no beneficial effect of improving lithium-ion performance. Effect of High Discharge Capacity Retention

Pending Publication Date: 2022-03-22
HUBEI JINQUAN NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no beneficial effect on the improvement of the performance of lithium ions at high temperatures, and further improvement is needed.
[0007] Although relevant technical personnel have done a lot of work, there are still the following problems: (1) It is difficult to balance the high and low temperature performance of lithium iron phosphate batteries. Under the premise of satisfying high temperature discharge, the low temperature discharge retention rate is poor
(2) It is difficult to balance the various properties of lithium iron phosphate to meet the high and low temperature discharge, and the cycle life is short

Method used

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  • Lithium ion battery electrolyte and preparation method and application thereof
  • Lithium ion battery electrolyte and preparation method and application thereof
  • Lithium ion battery electrolyte and preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0054] The present embodiment provides a kind of lithium-ion battery electrolyte:

[0055] A wide temperate 12V lithium-ion battery electrolyte, lithium hexafluorophosphate 11.20%, lithium bisfluorosulfonimide 7.19%, ethylene carbonate 20.15%, propylene carbonate 4.04%, dimethyl carbonate 24.18%, Ethyl methyl carbonate 32.24%, vinylene carbonate 0.165%, ethylene ethylene carbonate 0.165%, fluoroethylene carbonate 0.165%, lithium difluorophosphate 0.34% and lithium difluorooxalate borate 0.165%.

Embodiment 2

[0057] The present embodiment provides a kind of lithium-ion battery electrolyte:

[0058] A wide temperate 12V lithium-ion battery electrolyte, lithium hexafluorophosphate 11.20%, lithium bisfluorosulfonimide 7.19%, ethylene carbonate 19.65%, propylene carbonate 3.93%, dimethyl carbonate 23.58%, Ethyl methyl carbonate 31.45%, vinylene carbonate 0.5%, ethylene ethylene carbonate 0.5%, fluoroethylene carbonate 0.5%, lithium difluorophosphate 1.0% and lithium difluorooxalate borate 0.5%.

Embodiment 3

[0060] The present embodiment provides a kind of lithium-ion battery electrolyte:

[0061] A wide temperate 12V lithium-ion battery electrolyte, lithium hexafluorophosphate 12.26%, lithium bisfluorosulfonimide 6.13%, ethylene carbonate 26.87%, dimethyl carbonate 13.435%, methyl ethyl carbonate 40.304% in the lithium battery electrolyte , vinylene carbonate 0.5%, ethylene ethylene carbonate 0.25%, fluoroethylene carbonate 0.75%, lithium difluorophosphate 1.0% and lithium difluorooxalate borate 0.5%.

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Abstract

The invention provides a lithium ion battery electrolyte and a preparation method and application thereof. The electrolyte comprises an organic solvent, a lithium salt and an additive, wherein the additive comprises vinylene carbonate and lithium difluoro (oxalato) borate. According to the wide-temperature 12V lithium ion battery electrolyte, the electrochemical performance of the battery is improved by regulating and controlling the types and the addition amount of the additives, and the wide-temperature 12V lithium ion battery electrolyte simultaneously meets high and low temperature discharge characteristics and is long in cycle life.

Description

technical field [0001] The invention relates to the field of lithium ion batteries, and relates to a lithium ion battery electrolyte and a preparation method and application thereof. Background technique [0002] With the vigorous development of the global new energy industry, a green and low-carbon circular development economic system of carbon peaking / carbon neutrality is gradually taking shape. Lead-acid batteries are mainly used for the start-stop power supply of automobiles, which have low energy density, short cycle life, and heavy environmental pollution, which is contrary to the theme of green and low-carbon development. 12V lithium iron phosphate batteries have high specific energy, long cycle life, and good safety performance , low cost, and environmental friendliness are more in line with the needs of the era of energy conservation and emission reduction. At the same time, the 12V lithium iron phosphate battery directly replaces the lead-acid battery, which is par...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0566H01M10/0567H01M10/0525
CPCH01M10/0567H01M10/0525H01M10/0566Y02E60/10
Inventor 熊珊易靖宇朱昌波魏成卓谭立波高夜军阮祝华苑丁丁
Owner HUBEI JINQUAN NEW MATERIALS CO LTD
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