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Preparation method of solid oxide fuel cell connector protective film

A solid oxide and fuel cell technology, applied in fuel cells, circuits, electrical components, etc., can solve problems such as poor performance of connectors, uneven thickness of cobalt-manganese spinel coating, etc., to improve high temperature oxidation resistance, The effect of low cost and easy mass production

Active Publication Date: 2019-08-30
HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a method for preparing a protective film of a solid oxide fuel cell connector. The preparation method uses arc ion plating to prepare a manganese-cobalt protective film, and oxidizes it to finally form a manganese-cobalt spinel oxide protective film. The method adopts the arc ion plating method to solve the defects such as the uneven thickness of the cobalt-manganese spinel coating in the prior art, which leads to poor performance of the connector, and effectively improves the high-temperature oxidation resistance of the connector of the solid oxide fuel cell , Anti-cathode poisoning and other properties

Method used

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  • Preparation method of solid oxide fuel cell connector protective film
  • Preparation method of solid oxide fuel cell connector protective film
  • Preparation method of solid oxide fuel cell connector protective film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Prepare a piece of industrially produced 430 ferritic stainless steel SOFC connecting body with a thickness of 1mm, its mass fraction wt%: Cr 16.5, Mn 0.6, Si 0.5, C 0.1, Fe bal., wt%: weight percentage, bal: the rest. After the connecting body is degreased, impurity removed, mechanically polished, and ultrasonically cleaned in sequence, a clean solid oxide fuel cell connecting body is obtained.

[0042] Choose an arc source with a molar ratio of Mn to Co of 50:50, and vacuumize the chamber after installing the arc block and the connector. The target chamber vacuum degree is 1×10 -4 Pa, heat the cavity at the same time, the target temperature is 200°C, and increase the temperature of the connector while evaporating impurity gases such as water vapor to strengthen the binding force between ions and the connector. After the chamber vacuum and temperature reach the target value, turn on the arc switch and perform glow cleaning with a bias voltage of 800V. The glow cleaning...

Embodiment 2

[0047] Prepare a piece of industrially produced 430 ferritic stainless steel SOFC connecting body with a thickness of 1mm, its mass fraction wt%: Cr 16.5, Mn 0.6, Si 0.5, C 0.1, Fe bal., wt%: weight percentage, bal: the rest. After the connecting body is degreased, impurity removed, mechanically polished, and ultrasonically cleaned in sequence, a clean solid oxide fuel cell connecting body is obtained.

[0048] Choose an arc source with a molar ratio of Mn to Co of 30:70, and vacuumize the chamber after installing the arc block and the connector. The target chamber vacuum degree is 1×10 -4 Pa, heat the cavity at the same time, the target temperature is 200°C, and increase the temperature of the connector while evaporating impurity gases such as water vapor to strengthen the binding force between ions and the connector. After the chamber vacuum and temperature reach the target value, turn on the arc switch and perform glow cleaning with a bias voltage of 500V. The glow cleaning...

Embodiment 3

[0053] Prepare a piece of industrially produced 430 ferritic stainless steel SOFC connecting body with a thickness of 1mm, its mass fraction wt%: Cr 16.5, Mn 0.6, Si 0.5, C 0.1, Fe bal., wt%: weight percentage, bal: the rest. After the connecting body is degreased, impurity removed, mechanically polished, and ultrasonically cleaned in sequence, a clean solid oxide fuel cell connecting body is obtained.

[0054] Choose an arc source with a molar ratio of Mn to Co of 50:50, and vacuumize the chamber after installing the arc block and the connector. The target chamber vacuum degree is 1×10 -4 Pa, heat the cavity at the same time, the target temperature is 200°C, and increase the temperature of the connector while evaporating impurity gases such as water vapor to strengthen the binding force between ions and the connector. After the chamber vacuum and temperature reach the target value, turn on the arc switch and perform glow cleaning with a bias voltage of 500V. The glow cleaning...

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Abstract

The invention relates to the technical field of solid oxide fuel cells, and in particular relates to a preparation method of a solid oxide fuel cell connector protective film. The preparation method comprises the following steps: placing a solid oxide fuel cell connector in a cavity; selecting an electric arc source to carry out glow cleaning on the connector; filling the cavity with inert gas andadjusting vacuum degree of the cavity; carrying out electric arc ion plating on the connector; forming an Mn / Co protective film on the surface of the connector; and oxidizing the Mn / Co protective film on the surface of the connector to generate a (Mn, Co)3O4 spinel oxide protective film. Or, the preparation method comprises the following steps: placing the solid oxide fuel cell connector in the cavity; selecting the electric arc source to carry out glow cleaning on the connector; filling the cavity with oxygen or mixed gas of oxygen and inert gas; adjusting the vacuum degree of the cavity bythe injected oxygen or mixed gas of oxygen and inert gas; carrying out electric arc ion plating on the connector; and forming the (Mn, Co)3O4 spinel oxide protective film on the surface of the connector.

Description

technical field [0001] The invention relates to the technical field of solid oxide fuel cells, in particular to a method for preparing a solid oxide fuel cell connector protective film. Background technique [0002] In recent years, the decline of traditional petrochemical energy reserves such as oil and coal has led to high international oil prices. In addition, global warming and environmental pollution have become more and more serious. The development of new energy, rational use of energy, and improvement of energy utilization have become the focus of research in various countries. Fuel cells can directly convert chemical energy into electrical energy without going through the fuel combustion process, which effectively improves fuel utilization and is a more efficient and environmentally friendly energy utilization method. Solid oxide fuel cells (SOFC) Because of its high fuel utilization rate, wide fuel application range, no pollution, low cost, and no noise, it has bec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/32C23C14/18C23C14/08C23C14/02C23C14/54C23C14/58H01M8/0228
CPCC23C14/0021C23C14/021C23C14/085C23C14/18C23C14/325C23C14/54C23C14/5846H01M8/0228Y02E60/50
Inventor 武俊伟张三立
Owner HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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