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Surface modified metal connector of solid oxide fuel battery and manufacturing method of surface modified metal connector

A technology of solid oxide and metal connectors, which is applied in the field of surface modified metal connectors and its manufacture, fuel cell connectors and their surface modification, and can solve the problem of insufficient bonding between the modified layer and the substrate, delamination and peeling, etc. problems, to achieve excellent interfacial compatibility, good electronic conductivity, and simple process

Active Publication Date: 2015-01-07
DALIAN MARITIME UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention is aimed at the difficulty in obtaining a dense surface modification layer proposed above, and the ability to prevent further oxidation of the connector alloy, slow down the resistance rise and prevent the volatilization of Cr element is insufficient, the bonding force between the modified layer and the substrate is insufficient, and it is easy to delaminate and peel off problems, while studying and designing a surface-modified metal connector for solid oxide fuel cells and its manufacturing method

Method used

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  • Surface modified metal connector of solid oxide fuel battery and manufacturing method of surface modified metal connector

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Experimental program
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Effect test

Embodiment 1

[0017] A 0.5mm stainless steel plate of AISI 430 (with a Cr content of 17wt%) was used as the matrix, and the matrix structure was ferrite. Cut the 430 stainless steel plate into a sample with a size of 40x 40mm; then process the sample in the stamping equipment to form a gas flow field on both sides of the sample; and successively use dilute NaOH solution, acetone, etc. to clean the surface of the sample to remove the surface pollutants. Put the sample into a special vacuum container and first carry out infiltration and alloying treatment, and obtain a Co-Ni infiltration and alloying layer on the surface of the 430 stainless steel connector. The specific implementation is as follows: put the 430 stainless steel connecting body into a closed container as the cathode, and after the container is evacuated, argon is introduced as the working gas to keep the pressure in the furnace at 35Pa, and a 650V pulsed DC voltage is applied to the connecting body sample, and the metal 550V ...

Embodiment 2

[0018] Cut an AISI 430 (17wt% Cr) stainless steel plate with a thickness of 2.5 mm into a sample of 40 x 40 mm, form a gas flow field on both sides, and process it according to the steps in Example 1. The specific implementation is as follows: put the 430 stainless steel connecting body into a closed container as the cathode, and after the container is evacuated, hydrogen gas is introduced as the working gas to keep the pressure in the furnace at 1050Pa, and a pulsed DC voltage of 780V is applied to the connecting body sample, and the metal Co , Apply 850V pulsed DC voltage on the Mn source, and the current density is 12mA / cm 2 , to generate a glow discharge so that the metal source metal Co and Mn atoms are bombarded out, and a plasma atmosphere containing Co and Mn metal ions is formed to bombard the surface of the connected body sample. The temperature of the connected body sample is controlled at 950 ° C for 2 hours to make the connected body The surface of the sample form...

Embodiment 3

[0020] The 0Cr12 (12wt% Cr content) ferritic stainless steel plate with a thickness of 1.2mm was cut into a sample of 40x40mm, and the gas flow field was stamped and formed on both sides, and processed according to the steps of Example 1. The specific implementation is as follows: put the 0Cr12 stainless steel connector into a closed container as the cathode, and after the container is evacuated, a mixed gas of hydrogen and argon is introduced, the mixing ratio is 1:1, and as the working gas, the pressure in the furnace is maintained at 550Pa. Apply a pulsed DC voltage of 900V to the connected body sample, and apply a pulsed DC voltage of 880V to the metal Co source, with a current density of 5mA / cm 2 , to generate a glow discharge so that the metal source metal Co atoms are bombarded out, and a plasma atmosphere containing Co metal ions is formed to bombard the surface of the connected body sample. The temperature of the connected body sample is controlled at 850 ° C for 4 hou...

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Abstract

The invention discloses a surface modified metal connector of a solid oxide fuel battery and a manufacturing method of the surface modified metal connector. An iron-based connector comprises a substrate and a surface modified layer arranged on the surface of the substrate; the substrate is of a ferritic stainless steel plate with the thickness of 0.3-3.0mm; the ferritic stainless steel plate comprises 10-20% of chromium in percentage by weight; the surface modified layer is made of alloy oxide and has spinel structure with the thickness of 2-20mu n. The connector disclosed by the invention is excellent in high-temperature anti-oxidation property and good in electronic conductivity. The process disclosed by the invention is simple, a spinel oxide modification layer is tightly combined with the substrate, excellent interfacial compatibility is achieved, the synergistic effect of the modified layer and the substrate can be brought into play, and on-scale production is easy to achieve.

Description

technical field [0001] The invention relates to a fuel cell connector and a surface modification method thereof, in particular to a surface-modified metal connector of a solid oxide fuel cell and a manufacturing method thereof, belonging to the technical field of fuel cells. Background technique [0002] Solid oxide fuel cells (SOFC) have broad application prospects in distributed small power plants, ships / cars and other vehicles due to their advantages of cleanliness, high efficiency, high power, and quietness. A solid oxide fuel cell is a single cell composed of an anode, a cathode, and an electrolyte, and the voltage of the single cell is below 1.0V. According to the power requirements of practical applications, it is necessary to connect the single cells with connectors to form a battery stack to meet the voltage and current requirements. The connector not only plays the role of distributing fuel gas and oxidant to the battery anode and battery cathode respectively, but...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/02H01M8/10H01M8/1009
CPCH01M8/0297H01M8/10Y02E60/50Y02P70/50
Inventor 孙俊才程付鹏李嵩文钟晟季世军
Owner DALIAN MARITIME UNIVERSITY
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