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

N and S enriched dual-diameter mesoporous structural carbon carrier and preparation method and application thereof

A mesoporous structure and double-aperture technology, applied in the direction of structural parts, electrical components, battery electrodes, etc., can solve the problems that the sulfur-loaded matrix cannot withstand the cycle and rate process, and the sulfur-loaded capacity is not high, and achieve fast ion and electron transfer channels , High areal sulfur loading and high areal capacity

Active Publication Date: 2018-08-07
XIAN UNIV OF TECH
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The problem to be solved by the present invention is that the sulfur loading capacity of the positive electrode of the existing lithium-sulfur battery is not high, and the sulfur loading matrix cannot withstand the cycle and rate process under the condition of higher sulfur loading

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
  • N and S enriched dual-diameter mesoporous structural carbon carrier and preparation method and application thereof
  • N and S enriched dual-diameter mesoporous structural carbon carrier and preparation method and application thereof
  • N and S enriched dual-diameter mesoporous structural carbon carrier and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A carbon carrier with rich N and S dual-aperture mesoporous structure, with large pore volume and hierarchical mesoporous pores, the mesopore diameter is 30-60nm, the micropore diameter is 1.5-3nm, and the pore volume is 3.2cm 3 / g, the specific surface area is 791m 2 / g, wherein: the content of N and S elements is 4.18at% (atomic percentage content), the atomic ratio of C and S is 45.5:1, and the atomic ratio of C and N is 45:1.

[0035] The preparation of the above-mentioned N, S-rich double-aperture mesoporous structure carbon carrier (SNMPC) includes the following steps:

[0036] Mesoporous carbon as the basic carbon source, including disordered or ordered mesoporous carbon with single or double pore size;

[0037] Weigh 150 mg of mesoporous carbon and ultrasonically disperse it in deionized water, add 200 mg of zinc chloride and 100 mg of thiourea, mix well, place in a 160°C oven or low-temperature furnace for 7 hours, and obtain a semi-finished product;

[0038]...

Embodiment 2

[0043] A carbon carrier with rich N and S dual-aperture mesoporous structure, with large pore volume and hierarchical mesoporous pores. 3 / g, the specific surface area is 1420m 2 / g, wherein: the contents of N and S elements are both 4.25 at%, the atomic ratio of C and S is 45.5:1, and the atomic ratio of C and N is 45:1.

[0044] The preparation of the above-mentioned N, S-rich double-aperture mesoporous structure carbon support includes the following steps:

[0045] Mesoporous carbon as the basic carbon source, including disordered or ordered mesoporous carbon with single or double pore size;

[0046] Weigh 150 mg of mesoporous carbon and ultrasonically disperse it in deionized water, add 200 mg of zinc chloride and 200 mg of thiourea, mix well, and place in a 180°C oven or low-temperature furnace for 8 hours to obtain a semi-finished product;

[0047] The semi-finished product was heat-treated at 800°C for 2 hours under the protection of protective gas to obtain the finishe...

Embodiment 3

[0052] A carbon carrier with rich N and S dual-aperture mesoporous structure, with large pore volume and hierarchical mesoporous pores, the mesopore diameter is 30-60nm, the micropore diameter is 1.5-3nm, and the pore volume is 5.8cm 3 / g, the specific surface area is 1674m 2 / g, wherein: the contents of N and S elements are both 5.28 at%, the atomic ratio of C and S is 30:1, and the atomic ratio of C and N is 45:1.

[0053] The preparation of the above-mentioned N, S-rich double-aperture mesoporous structure carbon support includes the following steps:

[0054] Mesoporous carbon as the basic carbon source, including disordered or ordered mesoporous carbon with single or double pore size;

[0055] Weigh 150 mg of mesoporous carbon and ultrasonically disperse it in deionized water, add 200 mg of zinc chloride and 300 mg of thiourea, mix well, place in a 190°C oven or low-temperature furnace for 6 hours, and obtain a semi-finished product;

[0056] The semi-finished product wa...

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
pore sizeaaaaaaaaaa
pore sizeaaaaaaaaaa
specific surface areaaaaaaaaaaa
Login to View More

Abstract

The invention provides an N and S enriched dual-diameter mesoporous structural carbon carrier and a preparation method and application thereof and belongs to the technical field of cathode materials of energy storage batteries. The N and S enriched dual-diameter mesoporous structural carbon carrier is of a grading mesoporous structure, the mesoporous diameter ranges from 30-60 nm and the microporediameter ranges from 1.5 nm to 3 nm. An N and S enriched dual-diameter mesoporous structural carbon carrier coated high-capacity S and C composite material is prepared from the N and S enriched dual-diameter mesoporous structural carbon carrier and sulfur by melting and diffusing. The carbon carrier has large pore volume and specific surface area and can coat active material with high mass fraction, the active material cannot be stacked and gathered on the carbon surface, and the large pore volume is good for infiltration of electrolyte during application; besides, the dual-diameter mesoporous structure with crosslinking of micropores and mesoporous has good dispersing and adsorbing effects and provides a rapid ion and electron transfer passage, and facilitates realization of high electrochemical reaction dynamics.

Description

technical field [0001] The invention relates to the technical field of positive electrode materials for energy storage batteries, in particular to a carbon carrier with a double-aperture mesoporous structure rich in N and S, a preparation method and application thereof. Background technique [0002] Lithium-sulfur batteries have high theoretical specific capacity (1675mAh / g) and theoretical specific energy (2600Wh / kg), and their theoretical energy density is more than 5 times that of commercialized lithium-ion batteries. It is considered to be the most potential for development. One of the energy storage systems. [0003] Although lithium-sulfur batteries have great advantages in terms of energy density and cost, their commercialization is still limited due to some problems. In recent years, many carbon materials have been applied to lithium-sulfur batteries to solve the problems such as the protruding positive electrode of lithium-sulfur batteries. These problems include:...

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): H01M4/36H01M4/62
CPCH01M4/364H01M4/625Y02E60/10
Inventor 游才印张静徐红李立晗
Owner XIAN 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