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A kind of magnesium-air battery anode material and preparation method thereof

A technology for air batteries and anode materials, applied in the direction of battery electrodes, fuel cell half-cells and secondary battery-type half-cells, circuits, etc., can solve the problem of reducing battery efficiency, reducing battery discharge voltage, reducing surface active areas, etc. problems, to achieve the effect of optimizing the discharge process, excellent discharge performance, and reducing the thickness of the accumulation

Active Publication Date: 2021-09-24
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the discharge reaction is in progress, a large amount of discharge products will be produced, which will reduce the active area of ​​the surface, reduce the discharge voltage of the battery, and reduce the efficiency of the battery

Method used

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  • A kind of magnesium-air battery anode material and preparation method thereof
  • A kind of magnesium-air battery anode material and preparation method thereof
  • A kind of magnesium-air battery anode material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A magnesium-air battery anode material, the mass composition percentage of the anode material: Zn 2.0wt.%, Ca 0.1wt.%, the rest is magnesium.

[0026] (1) Take by weighing commercial pure magnesium (99.95wt.%), pure zinc (98.5wt.%), Mg-9.4wt.% according to the above-mentioned content Zn 2.0wt.%, Ca 0.1wt.%. %Ca intermediate alloy, and remove the oxide skin on the surface;

[0027] (2) Put the pure magnesium in (1) into a clean cast iron crucible and put them together in the hearth of a resistance furnace, preheat at 150°C for 20min to remove the moisture in the crucible, pure zinc and Mg-9.4wt. The %Ca master alloy is put into another clean cast iron crucible and put into another electric resistance furnace hearth, and is kept at a constant temperature of 300°C for standby;

[0028] (3) Raise the temperature of the resistance furnace with pure magnesium in (2) to 700°C, and feed a volume ratio of 19:1 (N 2 :SF 6 ) protective gas, when the melt temperature reaches 720...

Embodiment 2

[0031] A magnesium-air battery anode material, the mass composition percentage of the anode material: Zn 2.0wt.%, Ca 0.2wt.%, the rest is magnesium.

[0032] (1) Take by weighing commercial pure magnesium (99.95wt.%), pure zinc (98.5wt.%), Mg-9.4wt.% according to the above-mentioned content Zn 2.0wt.%, Ca 0.2wt.%. %Ca intermediate alloy, and remove the oxide skin on the surface;

[0033] (2) Put the pure magnesium in (1) into a clean cast iron crucible and put them together in the hearth of a resistance furnace, preheat at 200°C for 15min to remove the moisture in the crucible, pure zinc and Mg-9.4wt. The %Ca master alloy is put into another clean cast iron crucible and put into another electric resistance furnace hearth, and is kept at a constant temperature of 300°C for standby;

[0034] (3) Raise the temperature of the resistance furnace with pure magnesium in (2) to 710°C, and feed a volume ratio of 19:1 (N 2 :SF 6 ) protective gas, when the melt temperature reaches 725...

Embodiment 3

[0037]A magnesium-air battery anode material, the mass composition percentage of the anode material: Zn 2.0wt.%, Ca 0.5wt.%, the rest is magnesium.

[0038] (1) Take by weighing commercial pure magnesium (99.95wt.%), pure zinc (98.5wt.%), Mg-9.4wt.% according to the above-mentioned content Zn 2.0wt.%, Ca 0.5wt.%. %Ca intermediate alloy, and remove the oxide skin on the surface;

[0039] (2) Put the pure magnesium in (1) into a clean cast iron crucible and put them together in the hearth of a resistance furnace, preheat at 250°C for 15min to remove the moisture in the crucible, pure zinc and Mg-9.4wt. The %Ca master alloy is put into another clean cast iron crucible and put into another electric resistance furnace hearth, and is kept at a constant temperature of 300°C for standby;

[0040] (3) Raise the temperature of the resistance furnace with pure magnesium in (2) to 713°C, and feed a volume ratio of 19:1 (N 2 :SF 6 ) protective gas, when the melt temperature reaches 728°...

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Abstract

A magnesium-air battery anode material and a preparation method thereof relate to the technical field of magnesium-air batteries. The anode material of the magnesium-air battery is Zn 1.0-5.0 wt.%, Ca 0.1-2.0 wt.%, and the rest is magnesium. Preparation method: (1) According to Zn 1.0~5.0wt.%, Ca 0.1~2.0wt.%, the rest is magnesium, weigh pure magnesium, pure zinc, Mg-Ca master alloy, and remove the oxide scale on the surface; (2) ) Preheat the alloy treated in (1) in a crucible, and then put it into the crucible for melting; (3) cast the melt in (2) at a suitable temperature in a metal mold to cool. The hydrogen evolution reaction of metal anodes in neutral NaCl solution is alleviated, and the 2 Mg 6 Zn 3 The formation position of the second phase optimizes the discharge process, reduces the accumulation thickness of the discharge products on the anode surface, and accelerates the shedding of the products.

Description

technical field [0001] The invention relates to the technical field of magnesium-air batteries, in particular to an anode material for a magnesium-air battery with high anode efficiency and a preparation method thereof. Background technique [0002] In response to the depletion of fossil fuels and the increasingly serious pollution problems, safe and pollution-free magnesium-air batteries, as a new type of energy conversion and storage device, have attracted widespread attention. [0003] Magnesium alloy is not only the lightest structural material among metals, but also non-toxic, non-polluting and abundant in reserves. It is well known that the magnesium anode has a standard electrode potential (-2.37V vs. SHE), a high theoretical electrochemical equivalent (2200mAh g -1 ), higher energy density (6.800Wh·kg -1 ). After the battery is formed, the anode reactant is magnesium alloy, and the cathode reactant is oxygen in the air, which greatly saves the space inside the bat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/46C22C23/04C22C1/03
CPCC22C1/03C22C23/04H01M4/466H01M12/08Y02E60/10
Inventor 李淑波李函杜文博赵晨辰王朝辉刘轲杜宪于子健
Owner BEIJING UNIV OF TECH
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