Anti-overcharge low-temperature electrolyte and lithium ion battery based on same

An anti-overcharge and electrolyte technology, applied in the field of lithium-ion batteries, can solve the problems of inability to discharge, overcharge and discharge, low discharge capacity, etc., and achieve the effect of reducing impedance, low viscosity, and high ionic conductivity
CN113140799APending Publication Date: 2021-07-20SHAANXI COAL & CHEM TECH INST
3 Cites 3 Cited by

Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
SHAANXI COAL & CHEM TECH INST
Publication Date
2021-07-20

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses an anti-overcharge low-temperature electrolyte and a lithium ion battery based on the same, and belongs to the technical field of lithium ion batteries. The anti-overcharge low-temperature electrolyte comprises an organic solvent, a lithium salt, a low-impedance film-forming additive and an anti-overcharge additive, wherein the organic solvent comprises a carbonic ester solvent and a linear carboxylic ester solvent; the lithium salt comprises one or more of lithium hexafluorophosphate, lithium difluorophosphate, lithium tetrafluoroborate and lithium difluoro (oxalato) borate; the low-impedance film-forming additive is at least two of vinylene carbonate, 1, 3-propane sultone and ethylene sulfite; the anti-overcharge additive is 1, 4-di-tert-butyl-2, 5-dimethoxybenzene, wherein the content of the organic solvent is 78 wt%-82 wt%, the content of the lithium salt is 15 wt%-18 wt%, the content of the anti-overcharge additive is 1 wt%-2 wt%, and the balance is the low-impedance film-forming additive. The lithium ion battery solves the safety problem caused by low discharge capacity and even incapability of discharging of the existing lithium ion battery at low temperature and over-charge and over-discharge.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention belongs to the technical field of lithium ion batteries, and relates to an anti-overcharge low-temperature electrolyte and a lithium ion battery based thereon. Background technique

[0002] With the advancement of energy technology, lithium-ion batteries are more and more widely used in the fields of digital, power, energy storage and military aerospace. The expansion of application scenarios requires lithium-ion batteries to have the characteristics of both high and low temperature performance, especially the special requirements under extreme low temperature conditions. At the same time, since the current lithium-ion batteries mostly use flammable carbonate and carboxylate organic electrolytes, it is very likely to cause combustion or even explosion under extreme working conditions, such as overcharge, overdischarge and overheating, resulting in A big security risk. Therefore, the development of an electrolyte with high safety and low...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More