Aluminum-air battery aluminum plate material, aluminum-air battery aluminum plate and preparation method

Abstract

The invention relates to an aluminum-air battery aluminum plate material, an aluminum-air battery aluminum plate and a preparation method. The material takes aluminum as a main raw material, and alsocomprises rare earth oxide and indium oxide. The rare earth oxide can be an oxide of a lanthanide element, the mass percent of the rare earth oxide in the raw materials can be 0.015%-0.03%, the mass percent of the indium oxide in the raw materials can be 0.01%-0.025%, and the mass percent of the aluminum in the raw materials can be generally not lower than 99.95%. The aluminum plate is made of thematerial and is a plate-shaped or granular aggregate, and particles forming the granular aggregate are loaded in a container with a plate-shaped appearance. According to the preparation method, the raw materials are subjected to high-temperature melting and mixing and then are pressed and formed into a plate-shaped or granular material, and then the corresponding aluminum plate is prepared. Characteristics of the aluminum plate are improved, and the method is suitable for taking a sodium chloride solution as an electrolyte of a battery.

Description

technical field [0001] The invention relates to an aluminum pole plate material for an aluminum-air battery, an aluminum pole plate for an aluminum-air battery prepared with the material and a preparation method for the pole plate, and belongs to the technical field of aluminum-air batteries. Background technique [0002] Aluminum-air batteries have a series of advantages such as high specific energy, long life, safety and reliability, and environmental friendliness. The negative electrodes of traditional aluminum-air batteries are mainly made of high-purity aluminum. Aluminum itself is an extremely active metal. When its When exposed to the air, a dense oxide film will be formed on the surface, and an oxide film will also be formed during the electrode polarization process of aluminum, resulting in the defect of high resistance of the oxide film. In addition, the negative electrode of the traditional aluminum-air battery also has a high corrosion rate (usually 76×10 - 3 m...

AI Technical Summary

Problems solved by technology

[0002] Aluminum-air batteries have a series of advantages such as high specific energy, long life, safety and reliability, and environmental friendliness. The negative electrodes of traditional aluminum-air batteries are mainly made of high-purity aluminum. Aluminum itself is an extremely active metal. When its When exposed to the air, a dense oxide film will be formed on the surface, and an oxide film will also be formed on aluminum during the electrode polarization process, resulting in the defect of high resistance of the oxide film

In addition, the negative electrode of the traditional aluminum-air battery also has a high corrosion rate (usually 76×10 - 3 mm / a), weak deoxidation ability (usually <2.6ppm) and low electrochemical activity (usually α=1-3) and other defects

At the same time, due to the existence of these defects, aluminum-air batteries need to use potassium hydroxide (KOH) or sodium hydroxide (NaOH) aqueous solutions as electrolytes. If low-cost, safe and easy-to-use sodium chloride aqueous solutions are used as electrolytes, Unable to meet the actual use requirements