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

Nitrogen-doped porous carbon/sulfur composite material and preparing method and application thereof

A technology of nitrogen-doped porous carbon and composite materials, applied in non-aqueous electrolyte battery electrodes, electrical components, battery electrodes, etc., to achieve good cycle stability, high discharge specific capacity, and enhanced electron and ion transport effects

Active Publication Date: 2016-10-05
THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
View PDF3 Cites 19 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is still necessary to simplify the preparation process while improving cycle stability and rate performance

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
  • Nitrogen-doped porous carbon/sulfur composite material and preparing method and application thereof
  • Nitrogen-doped porous carbon/sulfur composite material and preparing method and application thereof
  • Nitrogen-doped porous carbon/sulfur composite material and preparing method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) Melamine, m-phthalaldehyde, and carbon nanotubes are put into thick-walled pressure-resistant reaction flasks with dimethyl sulfoxide (0.05g / mL according to the concentration of melamine) according to the mass ratio of 100:80:24, After reacting at 180° C. for 3 days under stirring, wash with dichloromethane and separate the solid;

[0038] (2) Put the obtained solid into a tube furnace and adjust the argon flow rate to 0.12 sccm and raise the temperature to 400°C for 5 hours to obtain a nitrogen-doped porous carbon material;

[0039] (3) After mixing the obtained carbon material and elemental sulfur in a mortar at a mass ratio of 2:3, put it into a closed glass tube, raise the temperature to 155°C at a heating rate of 5°C / min and keep it warm for 20h.

[0040] After naturally cooling to room temperature, acetylene black and polyvinylidene fluoride were slurried with NMP at a mass ratio of 8:1:1, mixed uniformly and coated on aluminum foil to obtain the lithium-sulfu...

Embodiment 2

[0042] (1) Put benzidine, m-phthalaldehyde, carbon nanofibers in a mass ratio of 100:120:24, and dimethyl sulfoxide (according to the concentration of benzidine is 0.10g / mL) into a thick-walled pressure-resistant reaction bottle , after reacting at 180° C. for 3 days under stirring, wash with dichloromethane and separate the solid;

[0043] (2) Put the obtained solid into a tube furnace and adjust the argon flow rate to 0.12 sccm, heat up to 600° C. for 3.5 hours, and obtain a nitrogen-doped porous carbon material;

[0044] (3) After mixing the obtained carbon material and elemental sulfur in a mortar at a mass ratio of 3:4, put it into a closed glass tube, raise the temperature to 165°C at a heating rate of 5°C / min and keep it warm for 15h.

[0045]After naturally cooling to room temperature, acetylene black and polyvinylidene fluoride were slurried with NMP at a mass ratio of 8:1:1, mixed uniformly and coated on aluminum foil to obtain the lithium-sulfur battery cathode mate...

Embodiment 3

[0047] (1) Put aniline, benzaldehyde, and carbon nanofibers in a thick-walled pressure-resistant reaction bottle according to the mass ratio of 100:120:24, and dimethyl sulfoxide (0.06g / mL according to the concentration of aniline), and stir After reacting at 180° C. for 3 days, wash with dichloromethane and separate the solid;

[0048] (2) Put the obtained solid into a tube furnace and adjust the argon flow rate to 0.12 sccm, heat up to 800° C. for 4.5 hours, and obtain a nitrogen-doped porous carbon material;

[0049] (3) After mixing the obtained carbon material and elemental sulfur in a mortar at a mass ratio of 4:3, put it into a closed glass tube, raise the temperature to 185°C at a heating rate of 5°C / min and keep it warm for 15 hours.

[0050] After naturally cooling to room temperature, acetylene black and polyvinylidene fluoride were slurried with NMP at a mass ratio of 8:1:1, mixed uniformly and coated on aluminum foil to obtain the lithium-sulfur battery cathode ma...

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 nitrogen-doped porous carbon / sulfur composite material and a preparing method and application thereof. The composite material is formed by a coaxial nitrogen-doped porous carbon material and elemental sulfur through compositing. The preparing method of the composite material includes the steps that a coaxial nitrogen-doped porous polymer / one-dimension nanometer composite material is subjected to high temperature treatment in a tube furnace under inert gas protection to form the coaxial nitrogen-doped porous carbon material, and then heat treatment compositing is carried out on the coaxial nitrogen-doped porous carbon material and the elemental sulfur to obtain the nitrogen-doped porous carbon / sulfur composite material. A lithium-sulfur battery based on the composite material is provided at the same time, the battery shows high specific discharge capacity, cycling stability and good rate performance.

Description

technical field [0001] The invention belongs to the field of lithium-sulfur batteries, in particular to a nitrogen-doped porous carbon / sulfur composite material and its preparation method and application. Background technique [0002] With the continuous consumption of global energy and the aggravation of environmental degradation, electrochemical energy storage has become a very urgent and severe problem facing mankind in the 21st century. Among them, lithium-ion secondary batteries are widely used because of their high energy density and working voltage, no memory effect, long cycle life, and environmental friendliness. However, based on the "de-intercalation" theory, the theoretical specific capacity of current commercial lithium-ion batteries is currently less than 300mAh g -1 , the actual energy density is less than 200Wh kg -1 , far from being able to meet people's requirements for electric vehicles to travel 500km on a single charge. [0003] Elemental sulfur has a...

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): H01M4/38H01M4/13H01M4/139
CPCY02E60/10
Inventor 智林杰肖志昌宋琪
Owner THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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