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

Composite sealing material for solid oxide fuel cell and battery sealing method

A solid oxide, fuel cell technology, used in solid electrolyte fuel cells, fuel cells, fuel cell components, etc., can solve the problem of not meeting the stable operation of SOFC, failing to meet electrical insulation requirements, and reducing sealing reliability, etc. problems, to achieve long-term operation stability and heat resistance cycle, overcome poor thermal stability and no electrical insulation, and prevent volatilization loss.

Active Publication Date: 2018-10-16
SHANXI UNIV
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the single use of silver-based glue for sealing has the following disadvantages: First, because silver is the most volatile noble metal, its vapor pressure increases rapidly with the increase of temperature, such as the vapor pressure at 706 ° C is 1.8× 10 -6 mm Hg, which increases to 1.4×10 at 842°C -4 mmHg, therefore, at a higher temperature (800-1000°C), with the increase of temperature and the extension of operating time, the metallic silver directly exposed to the atmosphere / gas phase will be volatilized and lost at a faster rate, The sealing layer becomes thinner, the sealing reliability decreases, and even the sealing fails, resulting in gas leakage
Second, at higher temperatures, silver will interact with active components in the atmosphere / gas phase (O 2 , SO 2 ,H 2 S, etc.) undergoes a chemical reaction, resulting in a change in its physical and chemical properties and a decrease in sealing reliability.
Again, the exposed silver sealing end face is a good conductor of electricity and cannot meet the electrical insulation requirements under specific conditions
Therefore, silver-based adhesive sealing materials cannot meet the requirements for stable operation of SOFCs at higher temperatures (>850°C) and for longer periods of time (>200 hours). It is necessary to provide a sealing material with low operating temperature and high thermal stability. , The sealing material has good sealing reliability and can guarantee the long-term stable operation of the battery at a relatively high temperature

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
  • Composite sealing material for solid oxide fuel cell and battery sealing method
  • Composite sealing material for solid oxide fuel cell and battery sealing method
  • Composite sealing material for solid oxide fuel cell and battery sealing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Composite sealing material preparation:

[0036] The distribution ratio of silver-based adhesive components: 75g of silver powder with a particle size range of 0.5-100 microns, 15g of bisphenol A epoxy resin, 6g of 1,4-butanediol glycidyl ether, and 3g of polymethylene polyphenyl polyisocyanate , 0.5g of 2-undecylimidazole, 0.5g of 3-aminopropyltrimethoxysilane;

[0037] Preparation of silver-based glue: first dissolve bisphenol A epoxy resin in 1,4-butanediol glycidyl ether and mix evenly, then add polymethylene polyphenyl polyisocyanate, 2-deca Monoalkylimidazole and 3-aminopropyltrimethoxysilane are mixed evenly; then silver powder is added to the above mixture, and mixed evenly to obtain silver-based glue, which is put into a container, airtight, and stored at low temperature for later use.

[0038]Raw material composition ratio of type I glass powder: SiO 2 35g, B 2 o 3 25g, BeO 15g, MgO 15g, CaO 10g;

[0039] Preparation of type I glass powder: Grinding or ...

Embodiment 2

[0061] Composite sealing material preparation:

[0062] The distribution ratio of silver-based adhesive components: 90g of silver powder with a particle size range of 0.5-100 microns, 5g of bisphenol F epoxy resin, 3g of 1,6-hexanediol diglycidyl ether, 1.5g of methylcyclohexyl diisocyanate, 2-ethyl-4-methylimidazole 0.5g;

[0063] The preparation of silver-based glue is the same as in Example 1.

[0064] Raw material composition ratio of type I glass powder: SiO 2 30g, B 2 o 3 30g, BeO 20g, MgO 10g, CaO 10g;

[0065] I type glass powder preparation, with embodiment 1.

[0066] Silver-based I-type glass composite adhesive composition ratio: 65g of silver powder with a particle size range of 0.5-100 microns, 15g of I-type glass powder, 6g of polyvinyl butyral, 10g of heptane, and 4g of paraffin oil;

[0067] The preparation of silver-based type I glass composite glue is the same as in Example 1.

[0068] Proportion of type II glass powder: SiO 2 35g, B 2 o 3 30g,A...

Embodiment 3

[0085] Composite sealing material preparation:

[0086] Distribution ratio of silver-based adhesive components: 75g of silver powder with a particle size range of 0.5-100 microns, 12g of bisphenol F epoxy resin, 10g of 1,4-butanediol glycidyl ether, and 2g of polymethylene polyphenyl polyisocyanate , 2-undecylimidazole 1g;

[0087] The preparation of silver-based glue is the same as in Example 1.

[0088] Raw material composition ratio of type I glass powder: SiO 2 25g, B 2 o 3 20g, BeO 20g, MgO 20g, CaO 15g;

[0089] I type glass powder preparation, with embodiment 1.

[0090] Silver-based type I glass composite adhesive composition ratio: 55g of silver powder with a particle size range of 0.5 to 100 microns, 30g of type I glass powder, 5g of ethyl cellulose, 8g of terpineol, and 2g of dimethyl phthalate;

[0091] The preparation of silver-based type I glass composite glue is the same as in Example 1.

[0092] Proportion of type II glass powder: SiO 2 35g, B 2 o 3 ...

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
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention provides a composite sealing material for a solid oxide fuel cell and a cell sealing method, and relates to the field of fuel cells. The composite sealing material comprises a core layer material, a coupling layer material and a shell layer material, wherein the core layer material is a silver-based adhesive coated at a sealing part, the coupling layer material is a silver-based I-type glass composite adhesive coated at the periphery of a core layer, and the shell layer material is an II-type glass-based adhesive coated at the periphery of a coupling layer. The method for sealing the cell by using the composite sealing material comprises the following steps: firstly, bonding a sealing surface subjected to pre-processing by using the silver-based adhesive, and performing drying so that the sealing surface is jointed; secondly, sealing the sealing part by using the silver-based adhesive, and performing drying to form the core layer; thirdly, coating the silver-based I-type glass composite adhesive at the periphery of the core layer, performing drying to form the coupling layer; and finally, coating the II-type glass-based adhesive at the periphery of the coupling layer, and performing drying to form a shell layer. The composite sealing material is low in sealing temperature and high in sealing reliability, and the cell is high in stability during long-term running under a relatively high temperature, and is also resistant to thermal cycles.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to a composite sealing material system and a battery sealing method suitable for solid oxide fuel cells. Background technique [0002] Solid oxide fuel cell (Solid Oxide Fuel Cell, SOFC) is an all-solid-state fuel cell with solid oxide as the electrolyte, which can directly convert the chemical energy of the fuel into electrical energy efficiently and cleanly. With the advantages of non-precious metal catalysts and easy realization of cogeneration of heat and electricity, it is a new generation of green power generation technology. [0003] The working temperature of medium and high temperature SOFC is generally 600-1000 °C. The sealing technology should maintain the airtightness of the anode and cathode to achieve reliable isolation of fuel gas and oxidizing gas, so as to ensure the safe and stable operation of SOFC. The sealing material of SOFC needs to meet the following requ...

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 Patents(China)
IPC IPC(8): H01M8/028H01M8/0286H01M8/10
CPCH01M8/028H01M8/0286H01M8/10Y02E60/50
Inventor 安文汀焦勇李思殿双少敏
Owner SHANXI UNIV
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