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Energy storage lithium ion battery and electrolyte and formation-aging method thereof

A lithium-ion battery, electrolyte technology, applied in the field of electrochemistry, to achieve the effect of improving cycle life and stability

Inactive Publication Date: 2019-05-03
SVOLT ENERGY TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, existing lithium-ion batteries for energy storage still need to be improved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Lithium-ion battery electrolyte comprises lithium salt, solvent, additive in the present embodiment, and wherein lithium salt is lithium hexafluorophosphate (LiPF 6 ), its concentration in the electrolyte is 1.15mol / L. The solvent used is ethylene carbonate (EC) 20wt%, ethyl methyl carbonate (EMC) 40wt%, dimethyl carbonate (DMC) 40wt%; The contained additive is lithium difluorophosphate (LiPO 2 f 2 ) 1 wt%, vinylene carbonate (VC) 1.5 wt%, succinonitrile (SN) 0.5 wt%.

Embodiment 2

[0039] Lithium-ion battery electrolyte comprises lithium salt, solvent, additive in the present embodiment, and wherein lithium salt is lithium hexafluorophosphate (LiPF 6 ), its concentration in the electrolyte is 1.15mol / L. The solvent used is ethylene carbonate (EC) 25wt%, ethyl methyl carbonate (EMC) 25wt%, dimethyl carbonate (DMC) 50wt%; The contained additive is lithium difluorophosphate (LiPO 2 f 2 ) 1 wt%, vinylene carbonate (VC) 1.5 wt%, succinonitrile (SN) 0.5 wt%.

Embodiment 3

[0041] Lithium-ion battery electrolyte comprises lithium salt, solvent, additive in the present embodiment, and wherein lithium salt is lithium hexafluorophosphate (LiPF 6 ), its concentration in the electrolyte is 1.15mol / L. The solvent used is ethylene carbonate (EC) 20wt%, ethyl methyl carbonate (EMC) 20wt%, dimethyl carbonate (DMC) 40wt%, dimethyl carbonate (DEC) 20wt%; The contained additive is difluoro Lithium phosphate (LiPO 2 f 2 ) 1 wt%, vinylene carbonate (VC) 1.5 wt%, succinonitrile (SN) 0.5 wt%.

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PUM

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Abstract

The invention discloses a lithium ion energy storage battery and an electrolyte and formation-aging method thereof. The electrolyte contains lithium salt, a solvent and an additive, wherein the solvent contains ethylene carbonate (EC), ethyl methyl carbonate (EMC) and dimethyl carbonate (DMC), and the additive contains vinylene carbonate (VC) and butyronitrile (SN). By applying the electrolyte tothe lithium ion energy storage battery, the service life of the lithium ion energy storage battery can be remarkably prolonged, and the stability of the lithium ion energy storage battery can be remarkably improved.

Description

technical field [0001] The invention relates to the field of electrochemistry, in particular to an energy storage lithium-ion battery, its electrolyte solution and a formation-aging method. Background technique [0002] Lithium-ion batteries are green, high-energy and environmentally friendly batteries that appeared in the 1990s. Due to their advantages such as high voltage, small size, light weight, high specific energy, no memory effect, no pollution, small self-discharge, and long life, they are used in mobile phones, Notebook computers, camcorders, digital cameras, tablet computers, and other portable electronic products that emphasize thinness, lightness, compactness, and multiple functions are rapidly popularized. [0003] In recent years, the application of lithium-ion batteries in energy storage has attracted more and more attention. At present, related work has built a number of energy storage power stations that have actually been put into use and have been succes...

Claims

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Application Information

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IPC IPC(8): H01M10/0525H01M10/0567H01M10/44
CPCY02E60/10
Inventor 祁朋飞刘祥哲刘丰
Owner SVOLT ENERGY TECHNOLOGY CO LTD