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Spinel/metal connector composite material for solid oxide fuel cell and preparation method thereof

A technology of solid oxides and metal connectors, applied in fuel cells, circuits, electrical components, etc., can solve the problems of cathode poisoning and high temperature oxidation resistance, insufficient and other problems, achieve good high temperature electrical conductivity and high temperature oxidation resistance, and inhibit growth , the effect of inhibiting internal diffusion

Active Publication Date: 2020-07-14
JIANGSU YONGHAO HIGH STRENGTH BOLT
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that the metal connector is easy to cause cathode poisoning and insufficient high temperature oxidation resistance in the working environment of solid oxide fuel, the purpose of the present invention is to provide a spinel / metal connector composite material for solid oxide fuel cells, which has High temperature conductivity and high temperature oxidation resistance

Method used

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  • Spinel/metal connector composite material for solid oxide fuel cell and preparation method thereof
  • Spinel/metal connector composite material for solid oxide fuel cell and preparation method thereof
  • Spinel/metal connector composite material for solid oxide fuel cell and preparation method thereof

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Embodiment 1

[0022] Preparation of Cu-Mn-Co spinel coating on the surface of solid oxide fuel cell metal connector by plasma spraying:

[0023] (1) Mix 100-mesh Cu powder, 100-mesh Mn powder and 100-mesh Co powder in a molar ratio of 0.1:0.9:2. The mixed powder was ball milled for 3 h using a planetary mill.

[0024] (2) Wire-cut the SUS304 stainless steel substrate, and perform sandblasting roughening on the surface. The sandblasting air pressure is 0.5Mpa, and the time is 90s;

[0025] (3) After surface roughening, put the sample into a box-type resistance furnace for pre-oxidation at 800°C for 100 hours;

[0026] (4) Before spraying, dry the mixed metal powder in an oven at 300°C for 3 hours. Plasma spraying parameters, spraying power 25Kw, main air flow 80L min -1 , powder feeding rate 4g·min -1 , Spray distance 90mm. Working parameters of the spray gun, the horizontal distance of the spray gun sweeping once is 400mm, the longitudinal movement distance of the spray gun is 1mm, and...

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Abstract

The invention discloses a spinel / metallic interconnector composite material for a solid oxide fuel cell and a preparation method thereof. The preparation method comprises the following steps of: adopting stainless steel as a matrix, carrying out plasma spraying of a Cu-Mn-Co alloy coating layer with the thickness of 10-25mum on the surface, wherein the Cu-Mn-Co alloy coating layer is a mixture with Cu powder, Mn powder and Co powder; before spraying, carrying out sand-blasting roughening on the surface of the matrix, and carrying out preoxidization to generate a preoxidized layer and drying, wherein the spraying power is 25-30Kw, the main gas flow amount is 80-85L.min<-1>, the powder feeding rate is 4-10g.min<-1>, and the spraying distance is 90-95mm; and after spraying, presintering for 10-20 hours at the temperature of 750-800 DEG C. The spinel / metallic interconnector composite material and the preparation method disclosed by the invention have the advantages that the Cu-Mn-Co alloy coating layer prepared can effectively improve the high-temperature antioxidation performance and the conducting performance of the metallic interconnector under the working environment of oxidation of the solid-oxide fuel cell and inhibit external diffusion of Cr from the base materials to generate cathode poisoning.

Description

technical field [0001] The invention belongs to the field of medium and high temperature solid oxide fuel cells, and specifically relates to a Cu-Mn-Co spinel / metal connector composite material with high temperature conductivity and high temperature oxidation resistance prepared by plasma spraying. Used as a connector material in solid oxide fuel cells. Background technique [0002] Solid oxide fuel cell (SOFC) is an electrochemical device that directly converts chemical energy in fuel into electrical energy through electrode reactions. Due to the absence of combustion and mechanical processes, the chemical-electrical energy conversion efficiency of SOFC is as high as 85%, and it has the characteristics of no pollution and no noise. Generally speaking, the operating temperature of SOFC is 800°C to 1000°C. The high operating temperature means that the fuel can be reformed inside the fuel cell without external reforming, and the high-quality by-product, heat energy, can be us...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/0223
CPCH01M8/0223Y02E60/50
Inventor 赖永彪张宇郭平义孙杭邵勇王小京
Owner JIANGSU YONGHAO HIGH STRENGTH BOLT
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