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Method for preparing medium temperature SOFC monocell with anode functional layer by multi-layer aqueous tape casting

A functional layer, single cell technology, applied in fuel cells, battery electrodes, circuits, etc., can solve the problems of uneven density, complex processing, high cost, achieve long three-phase reaction interface, improve preparation efficiency, and excellent water resistance Effect

Inactive Publication Date: 2018-10-02
SHENZHEN POLYTECHNIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can also be used to prepare the anode functional layer with fine structure; Among them, dry pressing is difficult for the green body production, the mold wears a lot, the processing is complicated, and the cost is high. Secondly, the pressure can only be pressed up and down, and the pressure distribution is uneven. , uneven density, uneven shrinkage, cracking, delamination, etc.
Chemical vapor deposition method: pollutes the environment, will emit harmful gases, the deposition rate is relatively low, and has high preparation costs; non-aqueous tape casting method: uses a large amount of toxic organic solvents and additives, etc., which will cause certain harm to the human body and the environment. the harm of
Hot pressing lamination process: It is difficult to control the flow of materials during hot pressing, for example, for multi-layer green laminates with three-dimensional structures, they often deform due to uneven force

Method used

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  • Method for preparing medium temperature SOFC monocell with anode functional layer by multi-layer aqueous tape casting
  • Method for preparing medium temperature SOFC monocell with anode functional layer by multi-layer aqueous tape casting
  • Method for preparing medium temperature SOFC monocell with anode functional layer by multi-layer aqueous tape casting

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Experimental program
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Effect test

Embodiment 1

[0034] The surfactant components in Step A, Step B, and Step C include 10 parts by weight of nonylphenol polyoxyethylene ether, 5 parts of amino polyether silicone, 3 parts of thickener, and 2 parts of dibromoethane , 4 parts of sodium lauryl sulfate, 8 parts of alkyl phenyl.

[0035] In this embodiment, in step D, the ejection parameter is 600°C, the heating rate is 1°C / min; the optimum high-temperature sintering condition is 1450°C, the heating rate is 5°C / min, and the holding time is 5 hours.

[0036] In this embodiment, the ball milling speeds in step A, step B, and step C are all 350 rpm.

Embodiment 2

[0038] The surfactant components in Step A, Step B, and Step C include 20 parts by weight of nonylphenol polyoxyethylene ether, 15 parts of amino polyether silicone, 9 parts of thickener, and 8 parts of dibromoethane , 12 parts of sodium lauryl sulfate, 20 parts of alkyl phenyl.

[0039] In this embodiment, in step D, the ejection parameter is 650°C, the heating rate is 3°C / min; the optimum high-temperature sintering condition is 1550°C, the heating rate is 8°C / min, and the holding time is 7 hours.

[0040] In this embodiment, the ball milling speeds in step A, step B, and step C are all 450 rpm.

Embodiment 3

[0042] The surfactant components in step A, step B, and step C include 14 parts by weight of nonylphenol polyoxyethylene ether, 12 parts of amino polyether silicone, 5 parts of thickener, and 7 parts of dibromoethane , 10 parts of sodium lauryl sulfate, 12 parts of alkyl phenyl.

[0043] In this embodiment, in step D, the ejection parameter is 610°C, the heating rate is 3°C / min; the optimum high-temperature sintering condition is 1480°C, the heating rate is 6°C / min, and the holding time is 7 hours.

[0044] In this embodiment, the ball milling speeds in step A, step B, and step C are all 380 rpm.

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Abstract

The invention discloses a method for preparing a medium temperature SOFC monocell with an anode functional layer by multi-layer aqueous tape casting. The method comprises the following steps: A, preparing an anode layer blank membrane; B, preparing an anode functional layer blank membrane; C, preparing an electrolyte blank membrane; and D, performing molding and high temperature sintering on the anode layer blank membrane, the anode functional layer blank membrane and the electrolyte blank membrane. According to the method disclosed by the invention, the multi-layer aqueous tape casting process is adopted to obtain an SOFC half-cell without using the hot press lamination process, thereby reducing the phenomenon that deformation is generated in the hot press lamination process due to unevenstress, such that the half-cell cracks finally due to the stress generated in the blank in a high temperature sintering process.

Description

technical field [0001] The invention relates to the technical field of battery production, in particular to a method for preparing a medium-temperature SOFC single battery with an anode functional layer by multilayer water system casting. Background technique [0002] One of the most promising fuel cells is the solid oxide fuel cell (SOFC). SOFC is a very popular and cutting-edge new energy technology in today's research. Because it is not subject to the Carnot cycle, its combined heat and power can reach more than 80%. It is a conversion method with the highest energy conversion efficiency today. It is directly converted from the chemical energy of fuel. At the same time, the diversity of fuels makes it an energy source with great commercial value and development potential. [0003] In order to realize the commercialization of SOFC, it is imperative to reduce the operating temperature of fuel cells (600-800°C). In intermediate temperature solid oxide fuel cells, the thick...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M8/1253
CPCH01M4/8875H01M8/1253H01M2008/1293Y02E60/50
Inventor 王程程郭兰天
Owner SHENZHEN POLYTECHNIC
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