Solid-oxide fuel battery anode catalysis material containing rare earth element

Abstract

The present invention relates to a solid oxide fuel battery anode catalytic material, in particular to a lanthanon-containing solid oxide fuel battery anode catalytic material. The formula comprises NiOxReyOz; wherein, Ni stands for nickel, Re stands for lanthanide rare earth element and O stands for oxygen; y is more than 0 and less than 0.5, x is more than 0 and less than 2 and z is more than 0 and less than 1. The present invention is characterized in that the anode catalytic material is modified by adding lanthanide elements such as lanthanum, cerium, praseodymium, neodymium, samarium gadolinium, etc.; in the anode made from electrolyte, the material can prevent anode catalyst particle from growing, improve the interface contact between the anode catalytic material and the electrolyte, reduce the polarization resistance of the battery, improve the activity and the output performance of the battery.

Description

technical field [0001] The invention relates to a solid oxide fuel cell anode catalyst material, in particular to a solid oxide fuel cell anode catalyst material containing rare earth elements and its preparation. The anode catalyst nickel oxide is modified by adding rare earth elements, and the anode is improved through modification. The microstructure prevents the growth of nickel particles, improves the activity of the anode, reduces the polarization resistance of the battery, improves the output performance of the battery, and improves 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 ele...

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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 will lead to continuous reduction of electrode activity, damage to the electrode structure, and eventually make the battery lose its activity

(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 natural gas is very complicated and difficult, resulting in low output performance of the battery

Among them, copper-based anodes, cerium-based anodes, and perovskite-type anodes have good anti-carbon deposition effects, but there are problems such as low activity, which makes it difficult to achieve application development; although nickel-based anodes have improved electrode activity, they are relatively low. Difficult to achieve the goal of anti-carbon deposition; noble metal anode activity and anti-carbon deposition have been greatly improved, but its cost is high and it is 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 wet, and the interaction is not strong, resulting in continuous growth of nickel particles during the high-temperature reduction process, resulting in low anode activity and high anode polarization resistance, especially for hydrocarbon fuels such as natural gas less active

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