High conductivity solid oxide fuel cell connection part, preparation and application thereof

A technology of solid oxide and connecting parts, which is applied to fuel cell parts, fuel cells, battery pack parts, etc., can solve the problems of lack of flexibility, improve power generation performance, eliminate high-temperature expansion damage, and improve contact Effect

Active Publication Date: 2014-06-25
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] However, since these alloy power-taking parts are rigid materials, and the electrodes or connectors of the solid oxide fuel cell are ceramic parts, which are also not flexible, it is difficult to make good contact between the alloy power-collecting parts and the battery electrodes, and obtain higher Therefore, in order to make good contact between the two, a flexible material is required to connect the two. This flexible connection material must not only have high temperature oxidation resistance, but also have high electrical conductivity.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] In this embodiment, an Inconel 625 alloy mesh body is used as the coated substrate, the alloy mesh is 20 mesh, and the wire used for weaving the mesh is 0.5 mm. Substrates were cleaned ultrasonically in absolute ethanol before applying the coating. Before coating, the substrate was pre-oxidized at 850°C / 2h in air.

[0014] In this embodiment, the conductive composite oxide contained in the coating is prepared by the sol-gel method and has the composition La 0.7 Sr 0.3 CoO 3 The powder has an average particle size of about 0.3 μm. La 0.7 Sr 0.3 CoO 3 Powder, MnO 2 Co powder and Co powder are mixed at a molar ratio of 60:30:10, n-butanol and PVB are added as organic solvents and binders, the weights of which are 150% and 10% of the total weight of the solid phase powder, and the solid phase is formed after ball milling and dispersion The slurry with a content of 38% is uniformly coated on the surface of the alloy mesh substrate by brushing. After drying, it is sin...

Embodiment 2

[0017] In this embodiment, a SUS430 alloy mesh body is used as the coated substrate, the alloy mesh is 10 mesh, and the wire used for weaving the mesh is 1 mm. And ultrasonic cleaning in absolute ethanol. Before coating, the substrate was pre-oxidized at 800°C / 8h.

[0018] In this embodiment, the conductive composite oxide contained in the coating is prepared by a solid-state reaction method and is composed of MnFe 2 o 4 The powder has an average particle size of about 1.2 μm. MnFe 2 o 4 Powder and Co 3 o 4 The powder is mixed at a molar ratio of 70:30, ethanol and PVA are added as organic solvents and binders, and their weights are respectively 120% and 5% of the total weight of the solid phase powder. After ultrasonic dispersion, a slurry with a solid phase content of 44% is formed. The slurry is evenly coated on the surface of the alloy mesh substrate by dip coating, and after drying, it is sintered at 900°C for 3 hours, and the thickness of the coating is about 30 μ...

Embodiment 3

[0021] In this embodiment, a SUS430 alloy mesh body is used as the coated substrate, the alloy mesh is 40 mesh, and the wire used for weaving the mesh is 0.25 mm. And ultrasonic cleaning in absolute ethanol.

[0022] In this embodiment, the conductive composite oxide contained in the coating is prepared by a solid-state reaction method and is composed of Cu 1.3 co 1.7 o 4 The powder, the average particle size of the powder is about 1 μm. Will Cu 1.3 co 1.7 o 4 Powder, MnO 2 The powder is mixed at a molar ratio of 70:30, and n-butanol and PVB are added as organic solvents and binders. The weights are respectively 200% and 5% of the total weight of the solid phase powder. After ball milling and dispersion, a solid phase content of 33% is formed. Slurry, the slurry is uniformly coated on the surface of the alloy mesh by spraying, after drying, it is sintered at 800°C for 24h, and the thickness of the coating is about 6-8μm.

[0023] After 10 thermal cycles, the electrical...

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Abstract

The present invention relates to a high conductivity solid oxide fuel cell high temperature oxidation resistance flexible connection part. According to the present invention, a coating material is coated on the surface of an alloy network body or foam-like body to form a high temperature oxidation resistance protection coating, and the good conductivity is provided, such that the prepared flexible connection part having high conductivity at a high temperature oxidation atmosphere has characteristics of high conductivity and high temperature oxidation resistance, wherein the coating coated on the surface contains one or more than two materials selected from an oxide having a perovskite structure, an oxide having a spinel structure, an oxide having a fluorite structure and an oxide having a rutile structure, and at least one of the oxides has the conductivity of more than 1 S/cm at a temperature of 500-900 DEG C; and the flexible connecting part can be provided for improving contact between the electrode or connector of the solid oxide fuel cell and the current collection part, eliminating high temperature expansion damage caused by rigid contact and improving the electricity generation performance of the fuel cell, and has advantages of high temperature oxidation resistance, good electrical conductivity, simple battery stack assembly and the like.

Description

technical field [0001] The invention relates to a solid oxide fuel cell, specifically a high-conductivity solid oxide fuel cell flexible connection part, which is formed by coating a coating material on the surface of an alloy mesh or foam to form a high-temperature oxidation-resistant Protective coating, while having good electrical conductivity. A prepared flexible connecting part with high electrical conductivity in a high-temperature oxidizing atmosphere, the obtained connecting part has high electrical conductivity and high-temperature oxidation resistance. The flexible connecting part of the present invention can greatly improve solid The contact between the electrode or connecting body of the oxide fuel cell and the current collecting part eliminates the high temperature expansion damage caused by the rigid contact, improves the power generation performance of the fuel cell, and has the advantages of high temperature oxidation resistance, good electrical conductivity, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/02H01M2/20
CPCH01M8/0202H01M8/0245H01M2008/1293Y02E60/50
Inventor 涂宝峰程谟杰
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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