Method for preparing rare-earth aluminum alloy electrode material

Abstract

The invention provides a method for preparing a rare-earth aluminum alloy electrode material. Aluminum (CP level) with purity of more than or equal to 99.9 percent, serving as a raw material, is added with the following elements in percentage by mass: 0.05 to 49 percent of Zn, 0.05 to 0.15 percent of Ga, 0.05 to 0.20 percent of In, 0.01 to 0.10 percent of Pb, 0.05 to 0.30 percent of Mn, 0.05 to 0.30 percent of Sn and 0.20 to 0.50 percent of Re; and the mass content of impurities is less than or equal to 0.01 percent. According to the method, the rare-earth aluminum alloy electrode material is prepared by adopting doping of rare-earth elements, and the rare-earth aluminum alloy electrode material with excellent performance is obtained by solidification treatment of an external magnetic field so as to provide material support for practical application of an aluminum fuel cell. By the solidification treatment of the external magnetic field for the rare-earth aluminum alloy electrode material, the polarization performance of aluminum alloy electrodes can be improved, hydrogen evolution corrosion can be inhibited, the utilization rate of an anode is improved, and the working potential is increased.

Description

technical field [0001] The invention relates to a preparation method of a rare-earth aluminum alloy electrode material, and belongs to the technical field of preparation of aluminum alloy electrode materials for high-performance batteries. Background technique [0002] Aluminum has a high electrochemical equivalent of 2980A·h·kg -1 , the electrode potential is also relatively negative, up to -1.4V (vs.Hg / HgO) in alkaline medium. Therefore, metallic aluminum is an ideal electrode material. Because the corrosion rate of aluminum in the electrolyte is too fast, a large amount of hydrogen is produced, resulting in extremely low Faraday efficiency of the anode; at the same time, the oxide film covered on the surface of the aluminum increases the overpotential of the aluminum anode and reduces the voltage efficiency of the anode, so It is often necessary to add other elements for modification. Metal elements that can reduce the resistance of the oxide film, form a eutectic allo...

AI Technical Summary

Problems solved by technology

At present, there are many alloy systems studied, but the effect is not ideal, and there are few studies on rare earth doped aluminum alloy anodes.

The research on the solidification of aluminum alloys in magnetic fields mainly involves aluminum alloy structural materials, and there are no relevant reports on the research of aluminum alloys as electrode materials.

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