Method for preparing sealing pad of solid oxide fuel cell and waste material recovery process

A solid oxide and fuel cell technology, which is applied to fuel cell components, fuel cells, circuits, etc., can solve the problems of restricted production efficiency of gaskets, excessive shrinkage of gaskets, and low sealing success rate, etc., to achieve Improve the success rate of sealing, avoid the difficult control of thickness uniformity, and improve the effect of yield

Active Publication Date: 2014-11-26
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Based on the above-mentioned problems existing in the prior art, the present invention provides a preparation process of a flat SOFC gasket, the purpose of which is to solve the problem of low raw material utilization and serious waste when the tape casting method is used to prepare the gasket; Due to the limitation of drying time, the production efficiency is limited by the length of the casting table; solve the problem that the sealing rate is too low due to the excessive shrinkage of the gasket during heat treatment; solve the problem of uniformity in the preparation of thick gaskets

Method used

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  • Method for preparing sealing pad of solid oxide fuel cell and waste material recovery process
  • Method for preparing sealing pad of solid oxide fuel cell and waste material recovery process
  • Method for preparing sealing pad of solid oxide fuel cell and waste material recovery process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Fabrication of Gasket Blank by Tape Casting

[0043] Weigh 120g sealing material powder, add to 25g xylene and butyl acetate (according to 1 : 1 mass ratio) to the mixed solvent, add 6 g of dispersant, and use a roller ball mill at a speed of 125 rpm for 8 hours to mix.

[0044] Then add 4g of binder and 4g of plasticizer, and use a roller ball mill at a speed of 80rpm for 8 hours to mix evenly to obtain a stable slurry with a moderate viscosity.

[0045] After the slurry is sieved through a 190-mesh sieve and vacuum degassed, it is poured on the PET bottom film, driven forward by the bottom film, and a green body with a uniform thickness is obtained after passing through a scraper with a knife height of 0.3mm. The casting table is heated to 50°C, and when the biscuit reaches the end of the casting table, it is rolled up together with the PET base film.

[0046] Preparation of gasket

[0047] Peel off the green body from the PET base film, align the 6 layers of g...

Embodiment 2

[0052] Recycling of Gasket Blank Waste

[0053] The green body waste remaining after trimming in Example 1 was recovered.

[0054] Weigh 80g of the blank blank of the gasket, add 30g of xylene and butyl acetate (by 1 : 1 mass ratio) mixed solvents, and mixed with a roller ball mill at a speed of 80 rpm for 8 hours; repeat the method described in Example 1 to prepare the subsequent steps of the gasket blank.

[0055] After testing, the heat resistance, deformation resistance and other properties of the sealing gasket prepared by using the recycled waste materials are not different from those of the sealing gasket prepared in Example 1.

Embodiment 3

[0057] Fabrication of Gasket Blank by Tape Casting

[0058] Weigh 120g sealing material powder, add to 40g xylene and butyl acetate (according to 1 : 2 mass ratio) to the mixed solvent, add 10 g of dispersant, and use a roller ball mill at a speed of 125 rpm for 8 hours to mix.

[0059] Then add 6g of binder and 10g of plasticizer, and use a roller ball mill at a speed of 80rpm for 8 hours to mix evenly to obtain a stable slurry with a moderate viscosity.

[0060] After the slurry is sieved through a 190-mesh sieve and vacuum degassed, it is poured on the PET bottom film, driven forward by the bottom film, and a green body with a uniform thickness is obtained after passing through a scraper with a knife height of 0.3mm. The casting table is heated to 50°C, and when the biscuit reaches the end of the casting table, it is rolled up together with the PET base film.

[0061] Preparation of gasket

[0062] Peel off the green body from the PET base film, align the 6 layers of...

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Abstract

The invention provides a method for preparing a sealing pad of a solid oxide fuel cell and a recovery and utilization method of waste materials generated in the method. Powder of sealing materials are subjected to ball grinding and mixing after being matched with dispersing agents, bonding agents, plasticizing agents and solvents, casting and drying are carried out after the screen net filtering and the vacuum defoamation, blanks are cut according to the overall dimension requirement of the sealing pad, multiple layers are stacked and aligned, then, PET (polyethylene terephthalate) films and stainless steel plates are sequentially padded at two sides, the materials are filled into a plastic package bag for vacuum pumping and plastic package and are then placed on a hot pressing machine for hot pressing, and the materials are taken out to be cut into the sealing pad in specified sizes. Waste materials after cutting are collected, are subjected to ball grinding and mixing after being matched with the solvents and can be continuously used for preparing the sealing pad.

Description

technical field [0001] The invention relates to a method for preparing a sealing gasket for a solid fuel cell, in particular to a method for preparing the gasket and a method for recycling and reusing waste generated in the production method. Background technique [0002] A solid oxide fuel cell (SOFC) is an all-solid-state power generation device that directly converts chemical energy into electrical energy. Based on its high energy conversion efficiency, environmental friendliness, wide adaptability to fuels, and long service life, SOFC is an energy utilization method with broad application prospects. [0003] Common structures of SOFC include tube type and flat plate type, and other structures derived from these two basic structures. Among them, flat-plate SOFC is a research hotspot of SOFC due to its advantages of simple preparation process, low production cost, and simple assembly procedure when stacked. For planar SOFC, cell sealing is a key technology. When the SOF...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/02H01M8/00
CPCY02E60/50
Inventor 吴昊曾凡蓉钱继勤王绍荣占忠亮
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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