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Anode strip material for magnesium-air battery and preparation method and application thereof

A technology of air battery and anode belt, which is applied to battery electrodes, fuel cell half-cells and primary battery-type half-cells, circuits, etc. It can solve the problems of metal particle shedding, low anode utilization rate, and decline in discharge performance. Achieve the effects of low dislocation density, low processing cost and high discharge voltage

Inactive Publication Date: 2018-10-19
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the Mg alloy can be used at low current density (≤20mAcm -2 ) The metal particles fall off severely locally, resulting in a low utilization rate of the anode and a decline in discharge performance

Method used

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  • Anode strip material for magnesium-air battery and preparation method and application thereof
  • Anode strip material for magnesium-air battery and preparation method and application thereof
  • Anode strip material for magnesium-air battery and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 1. The nominal composition of the cerium of the present embodiment, yttrium modified AP65 magnesium alloy is 6.1wt.% Al, 5.1wt.% Pb, 0.13wt.% Ce, 0.13wt.% Y, 88.54wt.% Mg. Among them, magnesium and aluminum are pure metals with a purity of 99.99wt.%, and cerium and yttrium are added in the form of magnesium-rare earth master alloy.

[0033] 2. Put the magnesium, aluminum, lead, magnesium-cerium and magnesium-yttrium intermediate alloys into the high-purity graphite crucible at one time, pump the air pressure in the furnace to 1.5Pa and then fill it with argon until the air pressure reaches 0.05MPa, Then the fully stirred melt was cast in a stainless steel crucible in the furnace to obtain a size of Cerium, yttrium modified cast AP65 magnesium alloy ingot.

[0034] 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.

[0035] 4. Put the homogenized annealed AP65 magnesiu...

Embodiment 2

[0042]1. the preparation of the cerium, yttrium modified AP65 magnesium alloy extruded strip of the present embodiment is the same as embodiment 1, and the difference is that the thickness of the extruded strip described in step 4 is 10mm, width 120mm, extrusion ratio It is 10.23:1.

[0043] The microstructure characterization and electrochemical performance test of this embodiment are the same as those in Embodiment 1.

[0044] figure 1 (b) is a scanning electron micrograph of an AP65 magnesium alloy anode strip for a magnesium-air battery with an extrusion ratio of 10.23:1 in this example. The figure shows that the magnesium alloy strip has formed a relatively obvious band structure.

[0045] figure 2 (b) is the grain orientation diagram of the AP65 magnesium alloy anode strip for magnesium-air batteries with an extrusion ratio of 10.23:1 in this example. It can be seen from the figure that the grains of the magnesium alloy strip are fine and the (0001) orientation stre...

Embodiment 3

[0050] 1. the preparation of the cerium, yttrium modified AP65 magnesium alloy extrusion strip of the present embodiment is the same as embodiment 1, and the difference is that the thickness of the extruded strip described in step 4 is 5mm, width 120mm, extrusion ratio It is 20.45:1.

[0051] The microstructure characterization and electrochemical performance test of this embodiment are the same as those in Embodiment 1.

[0052] figure 1 (c) is a scanning electron micrograph of an AP65 magnesium alloy anode strip for a magnesium-air battery with an extrusion ratio of 20.45:1 in this example. It can be seen from the figure that the magnesium alloy anode strip forms a clear band structure, and the second phase is broken along the extrusion direction.

[0053] figure 2 (c) is the grain orientation diagram of the AP65 magnesium alloy anode strip for magnesium-air batteries with an extrusion ratio of 20.45:1 in this example. The grain size of the magnesium alloy anode strip i...

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Abstract

The invention belongs to the field of chemical power electrode materials, and discloses an anode strip material for a magnesium-air battery and a preparation method and application thereof. The preparation method comprises the steps of: placing magnesium, aluminum, lead and a magnesium-rare earth intermediate alloy into a graphite crucible, filling with argon gas, and casting a stirred melt into astainless steel crucible in a furnace to obtain a cerium and yttrium-modified casting state AP65 magnesium alloy; under an argon protection atmosphere, homogenizing and annealing the magnesium alloyand quenching with water; after preheating, performing hot extrusion, and controlling the amount of extrusion deformation to obtain a series of magnesium alloy strips with different thicknesses. The microstructure of the AP65 magnesium alloy can be regulated by alloying and extrusion deformation, so that the AP65 magnesium alloy has good corrosion resistance under an open circuit potential, can discharge, uniformly dissolve and inhibit hydrogen evolution under certain current density, thereby having a high open circuit voltage, discharge voltage and high anode utilization rate, and is suitableas anode materials for magnesium-air batteries.

Description

technical field [0001] The invention belongs to the field of chemical power electrode materials, and in particular relates to an anode strip material for a magnesium-air battery, a preparation method and application thereof. Background technique [0002] Magnesium-air batteries have high energy density, wide operating temperature range (-20-80°C), abundant sources of raw materials and low cost. Broad application prospects. 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) has relatively little environmental pollution, has high open circuit voltage and discharge voltage, and can be used at high current density (≥100mA cm -2 ) The lower anode utilization rate is high. However, the Mg allo...

Claims

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Application Information

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IPC IPC(8): H01M4/88H01M12/06
CPCH01M4/88H01M4/8875H01M12/06
Inventor 陈远业王乃光施志聪潘庭锋刘琛祺
Owner GUANGDONG UNIV OF TECH
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