Aluminum anode material for seawater power battery

Abstract

The invention discloses an aluminum anode material for a seawater power battery, which adopts aluminum as a base body, and comprises the following components in percentage by weight: 0.01 to 1.0 percent of activating element mercury, 0.05 to 2.0 percent of gallium, 0.05 to 2.0 percent of magnesium, 0.01 to 1.0 percent of tin and 0.01 to 1.0 percent of zinc. By designing the alloy composition and researching the electrochemical performance and the element activating mechanism, the alloy elements and compositions which can reduce the passivation and polarization of the aluminum anode and can improve the electrochemical activity and corrosion resistance of the aluminum anode material are selected, and the aluminum anode material for the large-power seawater-activating power battery with the advantages of short activating time, high current efficiency, stable discharging, less hydrogen evolution quantity, long service life and the like is prepared.

Description

technical field [0001] The invention belongs to the composition material of a chemical power source, in particular to an aluminum anode material for a high-power seawater power battery. Background technique [0002] Aluminum alloys are widely used as anode materials for seawater-activated power batteries. The characteristics of aluminum anode seawater-activated power batteries are suitable for high-current discharge, high specific energy, high specific power, rapid activation, and good impact resistance in the non-activated state. Long storage time. The battery uses AgO as the cathode, and the anode plates are stored in a dry environment and activated when immersed in a solution electrolyte or by flowing the electrolyte through the pores of the battery pack. This kind of battery can provide energy for various current supply systems used on the ocean, such as underwater unmanned vehicles, underwater navigation, communication and data acquisition and other electronic instrume...

AI Technical Summary

Problems solved by technology

[0003] At present, an important problem in aluminum anode seawater activated batteries is that there is a strong affinity between aluminum and oxygen, so that pure aluminum is easily passivated, and the surface is covered with a layer of stable and dense Al. 2 o 3 Oxide film, so that the potential of pure aluminum in neutral solution is only -0.78V (vs SCE), which cannot reach its theoretical electrode potential, cannot meet the voltage requirements of anode materials, and also causes voltage lag during discharge Phenomenon

Alloying aluminum by adding some alloying elements can significantly improve its electrochemical performance, effectively prevent or inhibit the formation of continuous and dense oxide film on the surface of aluminum, but at the same time, the corrosion resistance of aluminum alloy is greatly reduced, and self-discharge increases. Large, a large amount of hydrogen is produced, which reduces the utilization efficiency of aluminum anodes and the current efficiency of seawater batteries

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