Aluminium and lead laminar composite material

A composite material and lead layer technology, applied in the direction of metal layered products, layered products, electrodes, etc., can solve the unfavorable comprehensive performance of lead electrode materials composed of lead alloys, can not solve the problem of titanium-lead interface bonding, lead electrochemical performance Advantage weakening and other problems, to achieve the effect of reducing electrode internal resistance, weight reduction, and performance index improvement

Inactive Publication Date: 2007-12-26
KUNMING UNIV OF SCI & TECH
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Problems solved by technology

However, as the composition of the alloy becomes more complex, the electrochemical performance advantages of lead will be weakened. For example, after adding metallic calcium to the lead alloy, the mechanical strength of the lead alloy material can be improved, and with the increase of calcium content, the increase, but when the calcium content in the lead alloy exceeds 0.1%, the corrosion resistance of the lead alloy will drop sharply
Therefore, the complexity of lead alloy composition will have an adverse effect on the comprehensive performance of lead electrode materials
In order to reduce the internal resistance of the electrode, someone once plated lead on a copper plate or a copper mesh plate, and then coated it with an active material to make a lead battery plate, thereby improving the discharge capacity of the battery. Due to the incompatibility of the copper-lead interface, Objectively, holes will always be left on the copper-lead interface, which will cause the copper plate or copper stencil to be corroded quickly
Similarly, lead plating on titanium plates or titanium stencils, in addition to the high cost, still cannot solve the problem of titanium-lead interface bonding, and often leads to stripping of the lead coating.
The powder metallurgy method in the research stage prepares lead-aluminum "alloy" electrode materials. The method is to mix lead powder and aluminum powder with a certain particle size according to a certain ratio, and then use mechanical alloy ball milling to make a uniform lead-aluminum "pseudo-alloy". "Electrode material, which has a certain effect on increasing the strength of the electrode and reducing the resistance, but because the metal aluminum in it is in direct contact with the electrolyte, it will be corroded quickly, so it is not yet practical.

Method used

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  • Aluminium and lead laminar composite material

Examples

Experimental program
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Effect test

Embodiment 1

[0021] Use industrial aluminum plate with a thickness of 1mm to make an anode plate core 1 with an overall dimension (length×width) of 1025mm×630mm, which is slightly smaller than the traditional standard anode plate, and then use a 10mm thick industrial aluminum row to make an anode plate core 1 with a length×width of 1054mm×50mm Conductive beam 2, at one end of the conductive beam 2, cut off a copper lug interface end 3 with a length × width × thickness of 120 mm × 8 ~ 10 mm × 25 mm, and use the current aluminum-copper composite method on the cut aluminum conductive beam interface A piece of conductive copper tab 4 with a length×width×thickness of 120mm×12-16mm×28mm is prepared from the terminal 3 . The aluminum core board 1 is welded at the center position of the length direction of the conductive beam 2 to form a whole. After the welded core board 1 and the conductive beam 2 are subjected to surface removal treatment in the prior art, a layer with a thickness of A tin tran...

Embodiment 2

[0023] After the industrial aluminum plate with a thickness of 0.4 mm is used to draw mesh 7, it is cut according to the required capacity lead storage battery grid dimensions (length × width) and prepared into a complete grid shape with frame 8 and tabs 9, As the aluminum core, after the surface of the aluminum core grid is pretreated, a layer of 40 μm antimony transition alloy layer 10 is formed on it, and then the outer surface of the antimony transition alloy layer 10 is coated with a layer of Pb- Sb-As-Se lead alloy layer 11, and the grid meshes are not filled with lead alloy, as shown in Fig. 4, Fig. 5 and Fig. 6.

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Abstract

This invention provides an aluminum-tin composite laminate, which comprises aluminum as the core, tin or tin alloy as the outer layer, and transition element as the middle layer. The aluminum-tin composite laminate has such advantages as low internal resistance, high strength, light weight, high corrosion resistance, and high electrochemical performance.

Description

technical field [0001] The invention relates to a composite material, in particular to an aluminum-lead composite material used for making anode plates for hydrometallurgy and grids for lead storage batteries. technical background [0002] The current lead electrode materials are mainly multi-element alloy components with lead as the main component. Such as: Pb-Ca-Sn, Pb-Ca-Ag, Pb-Ag, Pb-Ca-Ag-rare earth, Pb-Sb-As-Se, etc. In practical applications, people always hope to improve the mechanical strength, electrical conductivity and corrosion resistance of electrodes by changing the components in lead alloys. However, as the composition of the alloy becomes more complex, the electrochemical performance advantages of lead will be weakened. For example, after adding metallic calcium to the lead alloy, the mechanical strength of the lead alloy material can be improved, and with the increase of the calcium content, the However, when the calcium content in the lead alloy exceeds ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/04B32B15/01
Inventor 竺培显孙勇
Owner KUNMING UNIV OF SCI & TECH
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