Preparation method and application of inert anode for ionic liquid low-temperature electrolytic aluminum

By preparing micron-sized porous inert tungsten anodes, the problems of anode corrosion and bubble desorption difficulties were solved, achieving high efficiency and stability in the low-temperature electrolytic aluminum process of ionic liquids, and promoting the industrial application of green aluminum smelting technology.

CN122343262APending Publication Date: 2026-07-07INSTITUTE OF PROCESS ENGINEERING CHINESE ACADEMY OF SCIENCES
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Patent Information

Application Number
CN202610725402.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-05-25
Publication Date
2026-07-07

AI Technical Summary

Technical Problem

In existing low-temperature electrolytic aluminum technology using ionic liquids, the chlorine gas generated at the anode corrodes the electrode material and is difficult to desorb, leading to an increase in the electrolytic cell voltage and affecting electrolysis efficiency and stability.

Method used

Inert tungsten anodes were prepared by spark plasma sintering and electrochemical dissolution to form micron-sized porous structures. The anodes were sintered in a vacuum environment by mixing tungsten powder, iron powder and carbon powder, followed by electrochemical dissolution in aluminochloride ionic liquid to remove the iron component and obtain a porous tungsten matrix.

Benefits of technology

The prepared tungsten anode exhibits good corrosion resistance and electrochemical stability, promotes chlorine bubble detachment, improves current efficiency, reduces electrolytic cell voltage, and enhances electrolytic stability.

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Abstract

The invention discloses a preparation method and application of an inert metal tungsten anode for ionic liquid low-temperature electrolytic aluminum, and relates to the technical field of electrolysis. The preparation method of the porous tungsten inert anode comprises the steps of raw material proportioning, raw material mixing, vacuum sintering and electrode purification, and according to the method, the porous tungsten anode with the pore diameter being 1-10 microns is prepared through the spark plasma sintering and electrochemical dissolution combined technology. The anode has excellent electrochemical stability and corrosion resistance, desorption of chlorine gas bubbles of the anode in the electrolysis process can be effectively promoted, and the voltage of an ionic liquid low-temperature electrolytic aluminum system can be effectively reduced.
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