Sealing material of medium temperature plate type solid-oxide fuel battery stack and sealing method

A technology of solid oxide and fuel cell stacks, which is applied to battery components, circuits, electrical components, etc., and can solve problems such as insufficient thermal and chemical stability, insufficient chemical stability, and easy oxidation and corrosion , to achieve good chemical compatibility, good insulation, and increase the effect of mechanical properties

Active Publication Date: 2012-10-10

武汉华科福赛新能源有限责任公司

5 Cites 11 Cited by

AI-Extracted Technical Summary

Problems solved by technology

Their respective advantages and disadvantages are: metal-based sealing materials can withstand certain plastic deformation, but are easily oxidized and corroded, and are not insulated, so the long-term stability is not good; mica-based sealing materials do not require very precise thermal matching, but when working A high load is required, the thermal cycle performance is not good, and potassium elements will cause poisoned electrodes; for glass and glass-ceramic based sealing materi...

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

Method used

[0039] By selecting Al2O3 and glass material as the raw material of the sealing material, good insulation can be provided to avoid short circuits between different battery cells in the stack. In particular, by selecting micron-sized oxide particles, close packing of the particles can be achieved, the size of pores in the powder material can be reduced, and its tortuosity can be increased, thereby achieving effective gas sealing. In addition, in the present invention, by adding the glass particles of the above components to the Al2O3 particles, at the working temperature of the flat solid oxide fuel cell stack, the glass softens to a certain viscosity, which can be incompletely sintered but only mechanically interlocked. The ceramic particle chains and particle clusters bonded together by force are bonded together to form a skeleton of a porous structure. The glass between the particle chains and particle clusters has a certain fl...

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

Abstract

The invention discloses a sealing material of a medium temperature plate type solid-oxide fuel battery stack, which comprises the following components: Al2O3 powder, glass powder and an organic additive which is taken as a binder and a plasticizer, wherein the glass powder is composed of BaO with mass percentage of 20%-25%, B2O3 with mass percentage of 10%-15%, MgO with mass percentage of 20%-25%, ZnO with mass percentage of 10-15% and SiO2 with mass percentage of 30%-35%, its particle size is about 5-10mum; and the particle size of the Al2O3 powder is about 1-10mum. The invention also discloses a method for using the sealing material to seal the medium temperature plate type solid-oxide fuel battery stack. According to the invention, the tight accumulation of the sealing particles can be realized, the leakage rate of the sealing materials can be reduced, the mechanical properties of the materials can be increased, and the gas sealing can be effectively realized by the sealing mode which is convenient for operating and processing.

Application Domain

Cell component details

Technology Topic

PlasticizerLeakage rate +4

Image

Examples

Experimental program(6)

Example Embodiment

[0042] Example 1. Preparation of composite sealing material:

[0043] Combine 80g of glass powder containing the above components and 120g of Al 2 O 3 Add 120ml of fish oil, xylene and ethanol mixed solution to the powder, ball mill for 24 hours to fully disperse the powder into a suspension; then add 8g butyl benzyl ester, 8g 1,2-propylene glycol (PAG), 14g polyvinyl butyral in turn The resin (PVB) and 0.1g cyclohexanone are ball milled for 24 hours to form a slurry with a certain viscosity. After removing the bubbles in the slurry using a vacuum device, the slurry is cast and dried, thereby preparing a composite sealing material substrate.

Example Embodiment

[0044] Example 2: Preparation of composite sealing material:

[0045] Combine 120g of glass powder containing the above components and 80g of Al 2 O 3 Add 120ml of fish oil, xylene and ethanol mixed solution to the powder, ball mill for 24 hours to fully disperse the powder into a suspension; then add 8g butyl benzyl ester, 8g 1,2-propylene glycol (PAG), 14g polyvinyl butyral in turn The resin (PVB) and 0.1g cyclohexanone are ball milled for 24 hours to form a slurry with a certain viscosity. After removing bubbles in the slurry using a vacuum device, the slurry is cast and dried, thereby preparing a composite sealing material cast sheet.

Example Embodiment

[0046] Example 3: Preparation of composite sealing material:

[0047] Combine 100g of glass powder containing the above components and 100g of Al 2 O 3 Add 120ml of fish oil, xylene and ethanol mixed solution to the powder, ball mill for 24 hours to fully disperse the powder into a suspension; then add 8g butyl benzyl ester, 8g 1,2-propylene glycol (PAG), 14g polyvinyl butyral in turn The resin (PVB) and 0.1g cyclohexanone are ball milled for 24 hours to form a slurry with a certain viscosity. After removing bubbles in the slurry using a vacuum device, the slurry is cast and dried, thereby preparing a composite sealing material cast sheet.

[0048] In addition to preparing composite sealing materials, Al 2 O 3 Make cast sheets separately from glass powder, or make Al separately 2 O 3 Casting sheet and glass paste are used together.

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

Description & Claims & Application Information

We can also present the details of the Description, Claims and Application information to help users get a comprehensive understanding of the technical details of the patent, such as background art, summary of invention, brief description of drawings, description of embodiments, and other original content. On the other hand, users can also determine the specific scope of protection of the technology through the list of claims; as well as understand the changes in the life cycle of the technology with the presentation of the patent timeline. Login to view more.

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