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

Lithium-sulfur battery and preparation method thereof

A lithium-sulfur battery and cell technology, which is applied in the manufacture of electrolyte batteries, battery electrodes, secondary batteries, etc., can solve the problems of active material loss, poor battery safety, and piercing the separator, so as to reduce process manufacturing costs and raw materials The effect of cost of use

Active Publication Date: 2015-05-27
GUANGDONG ZHUGUANG NEW ENERGY TECH
View PDF5 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the charging and discharging process, the elemental sulfur will be converted into polysulfides, and the polysulfides will be dissolved in the liquid organic electrolyte, resulting in the loss of active materials during the cycle, and more seriously, the dissolved sulfides will be Dendrites are precipitated on the negative electrode, which has a great risk of piercing the separator, resulting in extremely poor safety of the battery

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Example 1 , different from Comparative Example 2, this embodiment includes the following steps:

[0034]Polymer solution configuration: according to the ratio of methyl methacrylate: diisopropyl peroxydicarbonate: ethylene glycol dimethyl ether = 20: 0.5: 79.5, first weigh methyl methacrylate, ethylene glycol di Stir the methyl ether evenly for later use, and then add the corresponding proportion of diisopropyl peroxydicarbonate within 1 month before use.

[0035] Preparation of cathode sheet: same as Comparative Example 2.

[0036] Cathode film spraying: According to the relationship that the quality of methyl methacrylate is 5% of the mass of the cathode coating (that is, 0.5g of polymer solution), the polymer solution is evenly sprayed on the surface of the cathode film, and after it is fully infiltrated, the obtained The cathode sheet after spraying.

[0037] Electrolyte configuration: according to the mass ratio relationship of 1,3-dioxolane: ethylene glycol di...

Embodiment 2

[0040] Example 2 , different from Embodiment 1, this embodiment includes the following steps:

[0041] Polymer solution configuration: according to the ratio of methyl methacrylate: diisopropyl peroxydicarbonate: ethylene glycol dimethyl ether = 1: 0.05: 200, first weigh methyl methacrylate, ethylene glycol di Stir the methyl ether evenly for later use, and then add the corresponding proportion of diisopropyl peroxydicarbonate within 1 month before use.

[0042] Preparation of cathode sheet: same as Comparative Example 2.

[0043] Cathode film spraying: According to the relationship that the quality of methyl methacrylate is 0.1% of the mass of the cathode coating (that is, 0.4g of polymer solution), the polymer solution is evenly sprayed on the surface of the cathode film, and after it is fully infiltrated, the obtained The cathode sheet after spraying.

[0044] Others are the same as in Example 1, and will not be repeated here.

Embodiment 3

[0045] Example 3 , different from Embodiment 1, this embodiment includes the following steps:

[0046] Polymer solution configuration: according to the ratio of methyl methacrylate: diisopropyl peroxydicarbonate: ethylene glycol dimethyl ether = 1:0.05:1, first weigh methyl methacrylate, ethylene glycol di Stir the methyl ether evenly for later use, and then add the corresponding proportion of diisopropyl peroxydicarbonate within 1 month before use.

[0047] Preparation of cathode sheet: same as Comparative Example 2.

[0048] Cathode film spraying: According to the relationship that the quality of methyl methacrylate is 20% of the mass of the cathode coating (that is, 0.4g of polymer solution), the polymer solution is evenly sprayed on the surface of the cathode film, and after it is fully infiltrated, the obtained The cathode sheet after spraying.

[0049] Others are the same as in Example 1, and will not be repeated here.

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 belongs to the field of lithium-sulfur batteries and particularly relates to a preparation method of a lithium-sulfur battery and the lithium-sulfur battery prepared by adopting the method. When the method provided by the invention is used for preparing the lithium-sulfur battery, a polymer component is only introduced in a cathode of the lithium-sulfur battery, a polymer is not introduced in an anode electrode, and a solvent for configuring polymer slurry is selected from components in an electrolyte of the lithium-sulfur battery. Thus, the content of the polymer component can be introduced as small as possible, the solvent residues caused by using other solvents are avoided, and thus the lithium-sulfur battery has better performance.

Description

technical field [0001] The invention belongs to the field of lithium-sulfur batteries, in particular to a lithium-sulfur battery and a preparation method thereof. Background technique [0002] Since 1991, carbon materials were creatively used in the field of lithium-ion batteries and brought about revolutionary changes in this field, that is, after multiple charging and discharging efficiently and safely, they have been widely used in mobile phones, cameras, and notebooks. computers and other portable appliances. Compared with traditional lead-acid, Ni-Cd, MH-Ni batteries, lithium-ion batteries have higher specific volume energy density, specific gravimetric energy density, better environmental friendliness, smaller self-discharge and longer battery life. It is an ideal power supply for mobile appliances, power supplies for electric vehicles, and storage appliances for power stations in the 21st century. [0003] However, with the improvement of life taste, people put forw...

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): H01M10/058H01M10/0525H01M4/62H01M10/0569
CPCH01M4/602H01M4/62H01M10/0525H01M10/0564H01M10/058Y02E60/10Y02P70/50
Inventor 杨玉洁
Owner GUANGDONG ZHUGUANG NEW ENERGY TECH
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