Anode plate material for magnesium cell

Abstract

The anode plate material of magnesium cell is a continuously cast or continuously cast-rolled magnesium alloy, and its metallographic structure is a column crystal imward grown from surface layer andits structure is compact. Said anode plate material is an alloy using magnesium as base body and adding several elements, and said plate material is applicable to magnesium manganese laminated battery, cylindrical magnesium manganese dry battery, magnesium air cell and magnesium sea-water battery.

Description

Technical field: [0001] The invention belongs to the constituent materials of chemical power sources, in particular to the anode materials of magnesium batteries. technical background [0002] Magnesium batteries, such as magnesium-manganese laminated battery packs, are characterized by high voltage, high power, high capacity, storage resistance, excellent low-temperature discharge performance, and environmental protection (no mercury, no cadmium, no lead). In addition, the raw material resources of this battery are abundant, the production process is simple, and the production cost is low. It has realized the requirements of communication, electrical appliances, military, etc. that require more advanced laminated battery packs. Magnesium-manganese laminated battery packs have been applied in the military of some countries. However, magnesium-manganese laminated battery packs have not been commercialized. The reason for this situation is that apart from technical factors, m...

AI Technical Summary

Problems solved by technology

Magnesium-manganese laminated battery anode plates are now made of extruded or rolled magnesium alloy sheets. Whether it is extruded or rolled, the production process is very complicated, resulting in high production costs, especially for magnesium-manganese laminated batteries. Anodic magnesium alloy plates with a thickness of less than 1 mm are more difficult to produce and cost more

The metallographic structure of extruded or rolled anode magnesium alloy is very unfavorable to the corrosion resistance of the battery, especially the thin anode magnesium alloy plate. First, there are many product defects; second, grains, grain boundaries, impurities, excess phases and defects along the surface The third is that the process of extruding or rolling the magnesium alloy plate itself will cause residual stress in the sheet, so the structure of extruding or rolling the magnesium alloy plate is not suitable for the anode plate of the magnesium-manganese laminated battery Both are prone to stress corrosion and exfoliation corrosion, which causes lamellar exfoliation of the anode material, thus reducing the utilization rate of magnesium and even affecting the performance of the battery