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

Sodium-sulfur battery and manufacture method thereof

Active Publication Date: 2013-02-20
INST OF CHEM CHINESE ACAD OF SCI
View PDF6 Cites 27 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its working temperature is usually 300-350°C, which makes the sodium-sulfur battery need additional heating equipment to maintain the temperature during the working process, which greatly increases its operating cost; at the same time, since the sodium-sulfur battery is working, both sodium and sulfur In the liquid state, once the ceramic tube is damaged, a short circuit will be formed. At this time, the high-temperature liquid sodium and sulfur will directly contact and undergo a violent exothermic reaction, which seriously affects the safety of the sodium-sulfur battery operation.
Although room temperature sodium-sulfur batteries based on liquid electrolytes can solve the above two problems, the conductivity of elemental sulfur at room temperature is extremely low, and the intermediate product of electrochemical reaction, polysulfide ions, is easily soluble in the electrolyte, which makes room temperature sodium-sulfur batteries The capacity is low, and the cycle performance is not good (the number of cycles is difficult to exceed 20 cycles)

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
  • Sodium-sulfur battery and manufacture method thereof
  • Sodium-sulfur battery and manufacture method thereof
  • Sodium-sulfur battery and manufacture method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) Preparation of sulfur-microporous support composite positive electrode

[0036] The microporous carrier used in the experiment is microporous carbon (purchased from Japan Kuraray Co.), with a specific surface area of ​​920m 2 g -1 , the pore volume is 0.50cm 3 g -1 , the average pore size is 0.6nm, and the mass fraction of sulfur in the prepared sulfur-microporous carbon composite is 50%.

[0037] The preparation method of sulfur-microporous carbon composite is as follows:

[0038] (1) Weigh sulfur and microporous carbon according to the mass ratio of 1:1 and mix them evenly;

[0039] (2) The mixture of sulfur and microporous carbon was heated at 1°C min -1 The heating rate is heated to 130 ° C and maintained for 15 hours, so that the sulfur is fully dispersed in the microporous carbon;

[0040] (3) Stop heating and return to room temperature to obtain sulfur-microporous carbon composite.

[0041] The sulfur-microporous carbon composite prepared above is mixe...

Embodiment 2

[0047] (1) Preparation of sulfur-microporous support composite positive electrode

[0048] The microporous carrier used in the experiment is microporous iron oxide (purchased from Sigma-Aldrich Company), with a specific surface area of ​​340 m 2 g -1 , the pore volume is 0.22cm 3 g -1 , the average pore size is 1.5nm, and the mass fraction of sulfur in the prepared sulfur-microporous iron oxide composite is 20%.

[0049] The preparation method of sulfur-microporous iron oxide composite is as follows:

[0050] (1) Weigh sulfur and microporous iron oxide according to the mass ratio of 1:4 and mix them evenly;

[0051] (2) The mixture of sulfur and microporous iron oxide was heated at 3°C ​​min -1 Heating rate to 150°C and maintaining heating for 10h, so that sulfur can be fully dispersed in the microporous iron oxide;

[0052] (3) Stop heating and return to room temperature to obtain sulfur-microporous iron oxide composite.

[0053] The sulfur-microporous iron oxide compo...

Embodiment 3

[0059] (1) Preparation of sulfur-microporous support composite positive electrode

[0060] The microporous carrier used in the experiment is a microporous metal-organic framework coordination polymer (MIL-100(Cr), which is a coordination polymer formed by chromium and trimesic acid, purchased from Materiaux Institut Lavoisier Company), and the specific surface area 4000m 2 g -1 , the pore volume is 2cm 3 g -1 , the average pore diameter is 1.2nm, and the mass fraction of sulfur in the prepared sulfur-microporous metal-organic framework composite is 80%.

[0061] The preparation method of sulfur-microporous metal-organic framework composite is as follows:

[0062] (1) Weigh the sulfur and the microporous metal-organic framework according to the mass ratio of 4:1 and mix them uniformly;

[0063] (2) The mixture of sulfur and microporous MOFs was heated at 5°C min -1 The heating rate is heated to 165 ° C and maintained for 5 hours, so that the sulfur is fully dispersed in t...

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
Pore volumeaaaaaaaaaa
Average pore sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a sodium-sulfur battery and a manufacture method thereof. The sodium-sulfur battery comprises a metal sodium cathode, a sulfur-micropore carrier compound anode and organic electrolyte. The sulfur-micropore carrier compound anode is formed by mixing and heating sulfur and a micropore carrier according to a certain ratio, and the sulfur is evenly dispersed in micropore channels of the micropore carrier in short chain sulfur molecule mode. The micropore carrier comprises a carbon micropore carrier, a non-carbon micropore carrier and a composition of the carbon micropore carrier and the non-carbon micropore carrier. The sodium-sulfur battery can keep high circulation capacity, excellent stable circulation performance and good high magnification performance (large-current density charging and discharging) in large temperature range including room temperature. The main composition part sulfur-micropore carrier compound anode is simple in preparation method and suitable for large scale production and has high practicability. Raw materials are easy to obtain.

Description

technical field [0001] The invention belongs to the field of electrochemical power sources, and in particular relates to a sodium-sulfur battery and a preparation method thereof. Background technique [0002] Sodium-sulfur battery is a new type of high energy density secondary energy storage battery. It has the advantages of small size, large capacity, long life and high efficiency. The raw materials of the battery are widely sourced, the preparation cost is low, it is not limited by the site, and it is easy to maintain. Sodium-sulfur batteries can realize high-current, high-power charge and discharge, and their discharge current density can generally reach 200-300mA / cm 2 , the charging and discharging efficiency can reach almost 100%, and the service life can be as long as 10-15 years. Since its appearance, it has received great attention and development in many countries in the world. In recent years, foreign countries have focused on the development of sodium-sulfur bat...

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): H01M10/39H01M4/36
CPCY02E60/12Y02E60/10
Inventor 郭玉国辛森殷雅侠万立骏
Owner INST OF CHEM CHINESE ACAD OF SCI
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