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

Battery anode material and lithium-sulfur battery

A battery positive electrode, lithium-sulfur battery technology, applied in the direction of battery electrodes, lithium batteries, non-aqueous electrolyte batteries, etc., can solve the problems of fast capacity decay, low rate performance of lithium-sulfur batteries, etc., to improve conductivity and reaction kinetics performance, and the effect of improving cycle stability

Pending Publication Date: 2019-09-27
GUANGDONG UNIV OF TECH
View PDF7 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the present invention provides a battery cathode material and a lithium-sulfur battery, which are used to solve the problems of low rate performance and fast capacity decay of existing lithium-sulfur batteries

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
  • Battery anode material and lithium-sulfur battery
  • Battery anode material and lithium-sulfur battery
  • Battery anode material and lithium-sulfur battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0084] Weigh 20g of urea into a crucible with a lid, place it in a muffle furnace and raise the temperature to 500°C at 2.5°C / min, carry out a thermal polymerization reaction for 4 hours, and obtain light yellow block g-C after natural cooling 3 N 4 . block g-C 3 N 4 After grinding and crushing, it is dispersed in absolute ethanol by ultrasonic stirring, the temperature is set to room temperature, and the ultrasonic time is set to 60 minutes, then centrifuged or filtered, and vacuum-dried for 12 hours after cleaning to obtain a two-dimensional layered graphitic carbon nitride, a two-dimensional layer The specific surface area of ​​graphitic carbon nitride is 64m 2 / g, for pictures of two-dimensional layered graphitic carbon nitride, please refer to figure 1 . see image 3 , is the XRD pattern of the two-dimensional layered graphitic carbon nitride prepared in Example 1 of the present invention, image 3 Among them, there are two peaks at 13.1° and 27.4°, which belong to...

Embodiment 2

[0089] Weigh 20g of melamine into a crucible with a lid, place it in a muffle furnace and raise the temperature to 550°C at 2.5°C / min, carry out a thermal polymerization reaction for 4 hours, and obtain light yellow block g-C after natural cooling 3 N 4 . block g-C 3 N 4 After grinding and crushing, it is dispersed in absolute ethanol by ultrasonic stirring, the temperature is set to room temperature, and the ultrasonic time is set to 60 minutes, then centrifuged or filtered, and vacuum-dried for 12 hours after cleaning to obtain a two-dimensional layered graphitic carbon nitride, a two-dimensional layer The specific surface area of ​​graphitic carbon nitride is 65m 2 / g. see Figure 4 , is the Raman diagram of the two-dimensional layered graphitic carbon nitride prepared in Example 2 of the present invention, Figure 4 Medium, g-C 3 N 4 No obvious Raman signal was detected on the composite material, but two clear Raman shift peaks were detected on the composite materi...

Embodiment 3

[0094] Weigh 20g of urea into a crucible with a lid, place it in a muffle furnace and raise the temperature to 550°C at 2.5°C / min, carry out a thermal polymerization reaction for 6h, and obtain light yellow block g-C after natural cooling 3 N 4 . block g-C 3 N 4 After grinding and crushing, it is dispersed in absolute ethanol by ultrasonic stirring, the temperature is set to room temperature, and the ultrasonic time is set to 60 minutes, then centrifuged or filtered, and vacuum-dried for 12 hours after cleaning to obtain a two-dimensional layered graphitic carbon nitride, a two-dimensional layer The specific surface area of ​​graphitic carbon nitride is 63m 2 / g.

[0095] Weigh 5g of two-dimensional layered graphite carbon nitride and 5g of starch, mix and grind for 30min, take it out and put it into a quartz boat with a quartz glass cover and place it in a tube furnace. The heating rate of min was raised to 700°C for 3 h in situ pyrolysis reaction, and after natural cool...

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

PropertyMeasurementUnit
specific surface areaaaaaaaaaaa
specific surface areaaaaaaaaaaa
specific surface areaaaaaaaaaaa
Login to View More

Abstract

The invention belongs to the technical field of lithium-sulfur batteries, and particularly relates to a battery positive electrode material and a lithium-sulfur battery. The invention provides the battery positive electrode material. The battery positive electrode material comprises a carbon-based composite material and sulfur filled in the carbon-based composite material, wherein the carbon-based composite material comprises two-dimensional layered graphite carbon nitride and carbon coating the two-dimensional layered graphite carbon nitride; the carbon-based composite material is obtained by carrying out an in-situ pyrolysis reaction on the two-dimensional layered graphite carbon nitride and a carbon-containing organic matter or carrying out chemical vapor deposition on carbon on the surface of the two-dimensional layered graphite carbon nitride. Experimental results show that when the battery positive electrode material is applied to the lithium-sulfur battery, the first specific discharge capacity of the lithium-sulfur battery at 0.1 C can reach 1,166mAh / g, and the lithium-sulfur battery has high specific capacity and good cycle performance.

Description

technical field [0001] The invention belongs to the technical field of lithium-sulfur batteries, and in particular relates to a battery cathode material and a lithium-sulfur battery. Background technique [0002] Lithium-ion batteries have been receiving extensive attention in various portable digital products and industrial fields with increasing demand, but the energy density of traditional lithium-ion batteries is already close to its theoretical value, so it is urgent to find the next generation of secondary batteries with high energy density . Lithium-sulfur battery is the most likely industrialized battery of the next generation, in which sulfur element as the positive electrode material of the battery has a high theoretical specific capacity (1675mAh / g) and energy density (2600Wh / Kg), and elemental sulfur is abundant in the earth and the price is low , environmental friendliness and other advantages, a very promising battery. [0003] However, the current lithium-su...

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
Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/38H01M4/62H01M10/052
CPCH01M4/362H01M4/38H01M4/62H01M4/625H01M4/628H01M10/052Y02E60/10
Inventor 刘全兵毛素华李栋冯格格党海峰党岱杨伟
Owner GUANGDONG UNIV OF 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