Magnesium-containing catalytic material for anode of solid oxide fuel cell, preparation and application thereof

Abstract

The invention relates to a catalytic material for the anode of a solid oxide fuel cell, in particular to a magnesium-containing catalytic material for the anode of a solid oxide fuel cell, preparation and application thereof. The magnesium-containing catalytic material comprises the component of NiOxMgyOz, wherein Ni represents nickel, Mg represents magnesium, O represents oxygen, y is larger than 0 and smaller than 0.5, x is larger than 0 and smaller than 2, and z is larger than 0 and smaller than 0.5. Characterized by using the catalytic material for the anode, the invention can reduce the polarization resistance of the cell, increase the activity of the electrodes and improve the output performance of the cell.

Description

technical field [0001] The invention relates to a solid oxide fuel cell anode catalyst material, specifically a magnesium-containing solid oxide fuel cell anode catalyst material and its preparation. The anode catalyst material can improve the microstructure of the anode and increase the activity of the anode. Reduce the polarization resistance of the battery, improve the output performance of the battery, and improve the output performance of the battery when using hydrocarbon fuels such as methane. The improvement of battery performance and the direct application of natural gas and other hydrocarbon fuels are of great significance to promote the development of solid oxide fuel cell technology to application technology. Background technique [0002] The solid oxide fuel cell is an energy conversion device that directly converts chemical energy into electrical energy. It adopts an all-solid structure, has the characteristics of high power generation efficiency, can directly ...

AI Technical Summary

Problems solved by technology

[0003] Direct use of natural gas and other hydrocarbons as fuel is an important feature of solid oxide fuel cells, and it is also the most important research object in the application of solid oxide fuel cells, but there are several serious problems: (1) The problem of carbon deposition on the electrode, carbon deposition leads to a continuous decrease in electrode activity, destruction of the electrode structure, and ultimately the loss of activity of the electrode

(2) The electrode activity is low, the activity of the electrode catalyst is low after high temperature sintering, and the process of electrochemically oxidizing hydrocarbon fuels such as methane is very complicated and difficult, resulting in low output performance of the battery

Among them, although copper-based anodes, cerium-based anodes, and perovskite-type anodes have good anti-carbon deposition effects, they have problems such as low activity and are difficult to achieve application development; although nickel-based anodes have improved electrode activity, they are difficult Reach the goal of anti-carbon deposition; noble metal anodes have greatly improved in activity and anti-carbon deposition, but their cost is high and they are not easy to apply

[0004] Nickel-based anodes are currently commonly used anode materials for solid oxide fuel cells. However, due to the need for high-temperature sintering (> 1300 ° C to obtain a dense electrolyte membrane) during the battery preparation process, nickel-based catalysts are severely sintered, and nickel-based catalysts are closely related to oxidation. Zirconium-based materials are not easy to infiltrate and the interaction is not strong, resulting in poor contact between nickel and electrolyte material YSZ after high-temperature reduction, resulting in low anode activity and high polarization resistance, especially for hydrocarbon fuels such as methane less active

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