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Magnesium alloy anode rolled board and preparing method and application thereof

A magnesium alloy and plate technology, which is applied in the field of chemical power electrode materials, can solve the problems of positive displacement of metal particles, decreased discharge performance, shedding, etc., and achieves the effects of small and uniform grain size, low dislocation density, and simple method.

Inactive Publication Date: 2018-04-03
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the AP65 magnesium alloy is discharged for a long time, the potential gradually shifts positively and the metal particles fall off locally, resulting in a decline in its discharge performance.

Method used

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  • Magnesium alloy anode rolled board and preparing method and application thereof
  • Magnesium alloy anode rolled board and preparing method and application thereof
  • Magnesium alloy anode rolled board and preparing method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1. The nominal composition of the zinc and manganese modified AP65 magnesium alloy of the present embodiment is 5.5wt.% of Al, 4.5wt.% of Pb, 0.8wt.% of Zn, 0.1wt.% of Mn, 89.05wt.% of Mg. Among them, magnesium, aluminum, lead and zinc are all pure metals with a purity of 99.99wt.%, and manganese is added in the form of Al-30wt.%Mn master alloy.

[0031] 2. Put magnesium, aluminum, lead, zinc and manganese into a high-purity graphite crucible at one time, pump the air pressure in the furnace to 2.4Pa and then fill it with argon until the air pressure reaches 0.06MPa, and then put the fully stirred molten The body was cast in a stainless steel crucible in a furnace to obtain an as-cast zinc and manganese modified AP65 magnesium alloy ingot with a size of 400×200×40 mm.

[0032] 3. The as-cast AP65 magnesium alloy ingot was uniformly annealed at 400° C. for 24 hours in a box-type resistance furnace, and then quenched in water.

[0033] 4. Preheat the homogenized anneale...

Embodiment 2

[0038] 1. The preparation of the zinc and manganese modified AP65 magnesium alloy rolled plate in this embodiment is the same as in embodiment 1, except that the total rolling deformation in step 4 reaches 63%.

[0039] The microstructure characterization and electrochemical performance test of this embodiment are the same as those in Embodiment 1.

[0040] according to figure 1 The metallographic photograph of (b) shows that the AP65 magnesium alloy grain size of 63% rolling deformation is fine and uniform; figure 2 The TEM bright-field images shown in (c)-(d) show that the magnesium alloy has a low dislocation density and a certain number of twins.

[0041] image 3 The shown potential-time curves show that the AP65 magnesium alloy with a rolling deformation of 63% is at 180mA cm -2 When the potential is relatively negative and stable.

[0042] Figure 4 (b) The scanning electron microscope secondary electron image shows that the AP65 magnesium alloy with a rolling def...

Embodiment 3

[0044] The preparation of the zinc and manganese modified AP65 magnesium alloy rolled plate in this example is the same as in Example 1, except that the total rolling deformation in step 4 reaches 86%.

[0045] The microstructure characterization and electrochemical performance test of this embodiment are the same as those in Embodiment 1. according to figure 1The metallographic photograph of (c) shows that the grain size of the AP65 magnesium alloy with a rolling deformation of 86% is further refined. figure 2 The TEM bright-field images shown in (e)-(f) show that the magnesium alloy has fine grains and high dislocation density, and the second phase Al 8 mn 5 Broken, twins disappear.

[0046] image 3 The shown potential-time curves show that the AP65 magnesium alloy with a rolling deformation of 86% is at 180mA cm -2 The time potential is slightly positive than that of the AP65 magnesium alloy with a rolling deformation of 63%. Figure 4 The SEM secondary electron ima...

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Abstract

The invention discloses a magnesium alloy anode rolled board and a preparing method and application thereof. The preparing method comprises the steps that magnesium, aluminum, lead, zinc and manganeseare put into a graphite crucible, argon is led in, stirred melt is casted in a stainless steel crucible in the a furnace, and an as-cast zinc and manganese modified AP65 magnesium alloy is obtained;under the argon protective atmosphere, the as-cast zinc and manganese modified AP65 magnesium alloy is subject to homogenizing annealing and then water quenching; rollers are preheated and heated, andan AP65 board is subject to intermediate annealing between two adjacent rolling passes, multi-pass hot rolling is carried out, the rolling pressing amount is controlled, and the magnesium alloy anoderolled board is obtained. Through alloying and rolling deforming, the microscopic structure of the AP65 magnesium alloy is regulated and controlled, under the open-circuit electric potential, good corrosion resistance is achieved, hydrogen evolution can be evenly dissolved and restrained through large-current density discharge, the negative discharge potential and the higher current efficiency can be achieved, and the magnesium alloy anode rolled board is suitable for being used a high-power ocean activated battery and magnesium-air battery anode material.

Description

technical field [0001] The invention belongs to the field of chemical power electrode materials, and more specifically relates to a magnesium alloy anode plate and its preparation method and application. Background technique [0002] High-power seawater-activated batteries and magnesium-air batteries have the characteristics of high energy density, and are widely used in underwater equipment and reserve power. This type of battery uses a highly active magnesium alloy as the anode, and provides current through the activation and dissolution of the anode material in the electrolyte. Currently commonly used highly active magnesium anode materials include Mg-Hg-Ga, Mg-Al-Pb, Mg-Al-Tl and so on. Among them, AP65 magnesium alloy (Mg-6wt.%Al-5wt.%Pb) is relatively less polluting to the environment. -2 ) has relatively negative potential and high current efficiency, and is a promising high-power battery anode. However, when the AP65 magnesium alloy is discharged for a long time, ...

Claims

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Application Information

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IPC IPC(8): C22F1/06C22C1/02C22C23/02
CPCC22F1/06C22C1/02C22C23/02
Inventor 李文平王乃光施志聪刘琛祺张开宇
Owner GUANGDONG UNIV OF TECH
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