Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Lithium battery electrolyte and lithium battery

An electrolyte and lithium battery technology, applied in the field of electrochemistry, can solve the problems of easy battery swelling, affecting the charging and discharging efficiency and life of lithium ion batteries, etc. Effect

Inactive Publication Date: 2017-06-27
ZHANGJIAGANG GUOTAI HUARONG NEW CHEM MATERIALS CO LTD
View PDF6 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The reductive decomposition on the negative electrode occurs after repeated charging and discharging, even if the preferred solvent of the electrolyte is used such as cyclic carbonate, such as ethylene carbonate and propylene carbonate, reduction also occurs, thereby affecting the charging and discharging efficiency and Life, and the battery is easy to swell

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
  • Lithium battery electrolyte and lithium battery
  • Lithium battery electrolyte and lithium battery
  • Lithium battery electrolyte and lithium battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1 to 11

[0024] Electrolyte: the lithium salt is lithium hexafluorophosphate, and the molar concentration of the lithium salt is 1 mol / liter. See Table 1 for other components and dosages in the electrolyte.

[0025] Negative electrode: artificial graphite, positive electrode: lithium cobalt oxide material, electrolyte, positive electrode, negative electrode are assembled into a lithium battery according to the conventional process, and the coulombic efficiency comparison of the initial charge of the lithium battery prepared in Example 1 and Example 5 can be found in figure 1 , Test the percentage of battery capacity and the battery expansion rate of the lithium battery prepared in each embodiment after 300 cycles of charging and discharging, the results are shown in Table 1.

[0026] Table 1

[0027]

[0028]

[0029] From figure 1 It can be seen that the embodiment 5 containing diethyl dithiocarboxylate forms a passivation film on the negative electrode of the lithium-ion batte...

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 relates to a lithium battery electrolyte and a lithium battery. The lithium battery electrolyte includes lithium salt, an organic solvent, and a functional additive including an additive S, mass percentage of the additive S being 0.1-10% in the lithium battery electrolyte. The additive S is a combination of one or more selected from compounds represented as the following structure formulas, wherein X is O or S, Y and Z are independently C or S, at least one of the X, Y and Z is S, and R1 and R2 are independently alkyl groups or halogenated alkyl groups, wherein the substituting halogen is F, Cl or Br and the halogenation is partial halogenation or complete halogenation. In the electrolyte, sulfur atoms in the additive S have strong electro-negativity, so that the reducibility of the additive is stronger than a corresponding carbonate on the surface of a negative pole. The additive S can form a film on the surface of the negative pole before decomposition of the solvent, so that the charge / discharge performance, normal temperature circulating performance and high-temperature standby performance of the battery are improved, side reactions are reduced and gas-swelling of the battery is reduced.

Description

technical field [0001] The invention belongs to the technical field of electrochemistry, and in particular relates to a lithium battery electrolyte and a lithium battery. Background technique [0002] Lithium-ion batteries have the advantages of high working voltage, large specific energy, no pollution, no memory effect, and long life. They are widely used in portable electrical devices such as mobile phones, digital cameras, and notebook computers. At the same time, they are used as an alternative energy source for petroleum in electric vehicles. And hybrid vehicles will also be applied on a large scale. [0003] In a nonaqueous lithium ion secondary battery using a highly crystalline carbonaceous material such as natural graphite or artificial graphite as an anode, reductive decomposition of the nonaqueous electrolyte solvent occurs on the surface of the anode during charging. The reductive decomposition on the negative electrode occurs after repeated charging and dischar...

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): H01M10/0567H01M10/0525
CPCH01M10/0525H01M10/0567Y02E60/10
Inventor 袁杰朱亚峰方剑慧赵世勇
Owner ZHANGJIAGANG GUOTAI HUARONG NEW CHEM MATERIALS CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com