Electrolyte for battery and battery using electrolyte

An electrolyte and battery technology, applied to secondary batteries, circuits, electrical components, etc., can solve the problems of increased heat generation of batteries, failure to improve battery performance of ternary lithium batteries, increase battery internal resistance, etc., to improve utilization efficiency , Improve antioxidant capacity, inhibit oxidation decomposition effect

Pending Publication Date: 2022-04-05
SHANGHAI RUIPU ENERGY CO LTD
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the ternary lithium battery, the combination of the fluoroester compound and the cyanocyclic unsaturated hydrocarbon cannot produce the same effect as in the lithium cobaltate battery, and the cyanocyclic unsaturated hydrocarbon When the temperature is high

Method used

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
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Electrolyte for battery and battery using electrolyte
  • Electrolyte for battery and battery using electrolyte
  • Electrolyte for battery and battery using electrolyte

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0036] Example 1

[0037] A method of preparation of lithium electrolyte, including the steps of:

[0038] In a glove box, a vinyl carbonate (EC), diethylate (DEC) and carbonate methyl ethyl carbonate (EMC) were mixed according to the ratio of mass 3: 2: 5, and then the mass fraction was added 6% to the mixed solvent. The fluoroate compound (1); then 1.1 M lithium hexafluorophosphate was added to dissolve. Thereafter, a mass fraction is 1% lithium vinyl carbonate (VC), and 0.8% lithium difluorophosphate is added to the electrolyte. 2 Fly 2 1% of the sulfate (DTD), another 0.5% trimethylcarbonate compound (5).

[0039] Injecting a well-known lithium-ion battery into LINI that is fully dry 4.45V 0.6 CO 0.2 Mn 0.2 O 2 / Graphite soft bag battery, after 45 ° C shelving, high-temperature clamping formation and secondary sealing, battery performance test, the battery used in Example 1 was obtained.

Example Embodiment

[0044] Example 2-32

[0045] In addition to the fluoroate compound solvent, the trimethylcarbonate compound is added as shown in Table 1, and the other is the same as in Example 1. EXAMPLES and the contrast electrolyte formulation is shown in Table 1.

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

PUM

No PUM Login to view more

Abstract

The invention discloses an electrolyte for a battery and the battery using the electrolyte. The electrolyte for the battery comprises a lithium salt, an organic solvent and an additive, wherein the organic solvent contains one or more of chain carbonic ester, cyclic carbonic ester, carboxylic ester and fluoro-ester substances, the additive contains trimethyl silicon carbonate substances, and the invention also discloses a battery containing the electrolyte containing the fluoro-ester substances and the trimethyl silicon carbonate substances. According to the invention, the fluoro-ester substance is good in wettability, has the characteristic of flame retardance and can form a low-impedance SEI film on a negative electrode, the addition of the trimethylsilyl carbonate substance can generate a layer of compact oxide film on the surface of a positive electrode, the charge transfer capability of the electrode is improved, and through the synergistic effect of the trimethylsilyl carbonate substance and the trimethylsilyl carbonate substance, the charge transfer capability of the electrode is improved. The high-temperature and high-pressure cycle performance and the safety performance of the battery are improved.

Description

technical field [0001] The invention relates to the field of batteries, in particular to a battery electrolyte and a battery using the electrolyte, in particular to an electrolyte containing fluorinated esters and trimethylsilicon carbonate substances and a battery using the electrolyte Lithium Ion Battery. Background technique [0002] Since Tesla spontaneously ignited on April 21, 2019, new energy electric vehicle spontaneous combustion accidents have occurred frequently. With the increase in the installed capacity of ternary lithium batteries and square shell batteries, the causes of accidents have a common feature. From the perspective of battery type, most of the accident vehicles are equipped with ternary lithium-ion batteries. [0003] The standard operating voltage of the ternary power lithium battery is 3.6-3.8V, and the energy density is 140-160wh / kg. High energy density and good low temperature performance are the biggest advantages of the ternary power lithium b...

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

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H01M10/0567H01M10/0569H01M10/0525
CPCY02E60/10
Inventor 曹辉付逊刘婵侯敏
Owner SHANGHAI RUIPU ENERGY CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap