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Preparation method for fuel cell with ordered porous structured electrode

A fuel cell and pore structure technology, which is applied in solid electrolyte fuel cells, battery electrodes, structural parts, etc., can solve the problems of reduced catalytic activity of electrodes, reduced porosity, etc., and achieves low preparation cost, good thermal expansion matching performance, and avoids volatilization. and the effect of migration

Active Publication Date: 2017-06-20
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the above-mentioned shortcomings and deficiencies of the existing preparation methods of solid oxide fuel cells, the object of the present invention is to provide a method for preparing solid oxide fuel cells with ordered pore structure electrodes, which can realize the preparation of solid oxide fuel cells with ordered pore structure The preparation of the electrode, but also to avoid the problem of porosity reduction and electrode catalytic activity reduction in the process of high temperature co-sintering

Method used

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Examples

Experimental program
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Effect test

preparation example Construction

[0020] (1) Preparation of ordered pore structure electrolyte layer slurry: pre-fired 8mol% yttria-stabilized zirconia ceramic powder at 350℃ for 4h; weigh the pre-fired 8YSZ powder according to the mass ratio of 65:5:30 , Polyethersulfone and N,N-dimethylformamide are ground to form an ordered pore structure electrolyte layer slurry;

[0021] (2) Preparation of dense electrolyte layer slurry: Weigh a certain mass of pre-fired 8YSZ powder, add fish oil as a dispersant and anhydrous ethanol-toluene mixed solvent, after ball milling for 24 hours, then add PVB and DOP respectively for bonding Dense electrolyte layer slurry is obtained after ball milling for 48 hours. The content of fish oil accounts for 1% of the mass of 8YSZ powder, and the content of absolute ethanol-toluene (the mass ratio of absolute ethanol-toluene is 2:3) is 8YSZ powder. 75% of mass, PVB content is 8% of 8YSZ powder mass, DOP content is 8% of 8YSZ powder mass;

[0022] (3) Preparation of electrode catalyst impre...

Embodiment 2

[0026] (1) Preparation of ordered pore structure electrolyte layer slurry: pre-fired 8mol% yttria-stabilized zirconia ceramic powder at 350℃ for 4h; weigh the pre-fired 8YSZ powder according to the mass ratio of 70:2:28 , Polyethersulfone and N-methylpyrrolidone are ground to form an ordered pore structure electrolyte layer slurry;

[0027] (2) Preparation of dense electrolyte layer slurry: Weigh a certain mass of pre-fired 8YSZ powder, add fish oil as a dispersant and anhydrous ethanol-toluene mixed solvent, after ball milling for 24 hours, then add PVB and DOP respectively for bonding Dense electrolyte layer slurry is obtained after ball milling for 48 hours. The content of fish oil accounts for 1% of the mass of 8YSZ powder, and the content of absolute ethanol-toluene (the mass ratio of absolute ethanol-toluene is 2:3) is 8YSZ powder. 75% of mass, PVB content is 8% of 8YSZ powder mass, DOP content is 8% of 8YSZ powder mass;

[0028] (3) Preparation of electrode catalyst impregn...

Embodiment 3

[0032] (1) Preparation of ordered pore structure electrolyte layer slurry: pre-fired 8mol% yttria-stabilized zirconia ceramic powder at 350℃ for 4h; weigh the pre-fired 8YSZ powder according to the mass ratio of 75:2:23 , Polyethersulfone and N,N-dimethylformamide are ground to form an ordered pore structure electrolyte layer slurry;

[0033] (2) Preparation of dense electrolyte layer slurry: Weigh a certain mass of pre-fired 8YSZ powder, add fish oil as a dispersant and anhydrous ethanol-toluene mixed solvent, after ball milling for 24 hours, then add PVB and DOP respectively for bonding Dense electrolyte layer slurry is obtained after ball milling for 48 hours. The content of fish oil accounts for 1% of the mass of 8YSZ powder, and the content of absolute ethanol-toluene (the mass ratio of absolute ethanol-toluene is 2:3) is 8YSZ powder. 75% of mass, PVB content is 8% of 8YSZ powder mass, DOP content is 8% of 8YSZ powder mass;

[0034] (3) Preparation of electrode catalyst impre...

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Abstract

The invention discloses a preparation method for a fuel cell with an ordered porous structured electrode. The preparation method is characterized in that the electrode has an ordered columnar porous structure; and the battery structure comprises a porous electrolyte layer impregnated with an electrode catalyst / compact electrolyte layer / porous electrolyte layer impregnated with the electrode catalyst. The preparation method comprises the steps of (1) preparing ordered porous structured electrolyte layer paste, compact electrolyte layer paste and an electrode catalyst impregnation liquid; (2) preparing porous electrolyte layer / compact electrolyte layer / porous electrolyte layer framework; and (3) impregnating the porous electrolyte layer framework with the electrode catalyst. The fuel cell provided by the invention can provide high gas transmission channels and ionic and electronic conductive network, and has better performance compared with a conventional solid oxide fuel cell; and meanwhile, the fuel cell has the advantages of high thermal expansion matching performance, low preparation cost, simple preparation process and the like, can be used as the fuel cell and an electrolytic cell and has high development prospect.

Description

Technical field [0001] The invention relates to the technical field of fuel cells, in particular to a method for preparing a solid oxide fuel cell with electrodes with an ordered pore structure. Background technique [0002] Solid oxide fuel cells (SOFCs) are electrochemical devices that directly convert the chemical energy of fuel gas into electrical energy in an efficient manner. They have the characteristics of high fuel selectivity, cogeneration, environmental friendliness, safety and reliability. It can be widely used in civil fields such as large power stations, distributed power stations, automotive auxiliary power supplies, household cogeneration systems, and can also be used in military power supplies. Therefore, the development of SOFCs is of great significance to the efficient utilization and diversified development of energy. [0003] In solid oxide fuel cells, the electrode reaction is generally considered to be confined to the electrode / electrolyte interface. At this...

Claims

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Application Information

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IPC IPC(8): H01M8/10H01M4/86H01M4/88
CPCH01M4/86H01M4/8605H01M4/88H01M8/10Y02E60/50
Inventor 程谟杰黄志东
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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