Metal-air battery metal electrode material and its preparation method and application

A metal-air battery, metal electrode technology, applied in the field of electrochemical energy, can solve the problems of unsatisfactory electrochemical performance, passivation, self-corrosion and the like of metal-air battery

Active Publication Date: 2021-07-06
RESEARCH INSTITUTE OF TSINGHUA UNIVERSITY IN SHENZHEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the above-mentioned deficiencies in the prior art, provide a metal-air battery metal electrode material and its preparation method, to solve the technical problems of hydrogen evolution, self-corrosion, and passivation in the existing magnesium anode
[0006] Another object of the present invention is to provide a metal-air battery metal electrode and a metal-air battery, so as to solve the problem of hydrogen evolution, self-corrosion, passivation, etc. Technical problems of unsatisfactory electrochemical performance

Method used

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  • Metal-air battery metal electrode material and its preparation method and application
  • Metal-air battery metal electrode material and its preparation method and application
  • Metal-air battery metal electrode material and its preparation method and application

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preparation example Construction

[0027] On the other hand, the embodiment of the present invention also provides the preparation method of the above-mentioned metal-air battery metal electrode material. The technical process of the preparation method of the metal-air battery metal electrode material is as follows: figure 1 shown, which includes the following steps:

[0028] S01: Smelting and alloying magnesium metal and alloy metal to form magnesium alloy;

[0029] S02: Casting and rolling the magnesium alloy by auxiliary heating to 300-500° C., and then continuing to perform several times of calendering and rolling.

[0030] Wherein, the smelting and alloying treatment in step S01 may be to melt magnesium metal and alloy metal according to the temperature and conditions for preparing magnesium alloys to form magnesium alloys.

[0031] The alloy metal in the step S01 is as described above, and may include at least one metal among aluminum, zinc, lithium, zinc, indium, gallium, and manganese. In addition, i...

Embodiment 1

[0038] This embodiment provides a metal electrode material for a metal-air battery and a preparation method thereof. The metal electrode material of the metal-air battery is a magnesium alloy with a porous and loose structure, and it is a magnesium alloy containing 96% of Mg, 3% of Al, 0.8% of Zn, and 0.2% of Mn.

[0039] The method for preparing a metal electrode material for a metal-air battery comprises the following steps:

[0040] S11. Preparation of magnesium alloy:

[0041] After cleaning the surface of raw materials, Mg metal, Al metal, Zn metal and Mn metal are mixed and smelted and alloyed to obtain a magnesium alloy with 96% Mg, 3% Al, 0.8% Zn, and 0.2% Mn ;

[0042] S12. Carrying out cast-rolling treatment and rolling-rolling treatment to magnesium alloy:

[0043] The magnesium alloy is subjected to casting and rolling treatment with auxiliary heating to 400°C, and then continues to be rolled for several times, so that the magnesium alloy can meet the relevant p...

Embodiment 2

[0045] This embodiment provides a metal electrode material for a metal-air battery and a preparation method thereof. The metal electrode material of the metal-air battery is a magnesium alloy with a porous and loose structure, and it is a magnesium alloy containing 93% of Mg, 4% of aluminum, 1% of gallium, 1.5% of indium and 0.5% of manganese.

[0046] The method for preparing a metal electrode material for a metal-air battery comprises the following steps:

[0047] S11. Preparation of magnesium alloy:

[0048] After cleaning the surface of the raw materials, magnesium metal, aluminum metal, gallium metal, indium metal, and manganese metal are mixed and smelted and alloyed to obtain 93% magnesium, 4% aluminum, 1% gallium, and 1.5% indium , Magnesium alloy with 0.5% manganese;

[0049] S12. Carrying out cast-rolling treatment and rolling-rolling treatment to magnesium alloy:

[0050] The magnesium alloy is subjected to casting and rolling treatment with auxiliary heating to ...

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Abstract

The invention discloses a metal electrode material for a metal-air battery, a preparation method and application thereof. The metal electrode material of the metal-air battery is a magnesium alloy with a loose structure, wherein the alloy elements in the magnesium alloy include at least one of aluminum, zinc, lithium, indium, gallium, and manganese. The preparation method comprises the steps of smelting and alloying magnesium metal and alloy metal, and casting and rolling the magnesium alloy. The metal electrode material of the metal-air battery of the present invention has refined magnesium alloy crystal grains, increases the overpotential of the hydrogen evolution reaction, can destroy the structure of the passivation film, and can alleviate the passivation problem of the magnesium alloy, so as to promote the active dissolution of the electrode and improve the electric capacity of the magnesium alloy. chemical properties. Moreover, the conditions of the preparation method are easy to control, and the prepared metal-air battery metal electrode material has stable performance and high efficiency. The metal-air battery metal electrode material can be used to prepare metal-air battery metal electrodes and metal-air batteries.

Description

technical field [0001] The invention belongs to the field of electrochemical energy, and in particular relates to a metal-air battery metal electrode material and a preparation method and application thereof. Background technique [0002] A metal-air battery is a semi-fuel cell, which uses oxygen in the air as the positive electrode active material, metal (zinc, magnesium or aluminum, etc.) as the negative electrode active material, and oxygen reaches the gas-solid-liquid three-phase interface through the gas diffusion electrode. It reacts with metals to release electricity. Metal-air batteries have high energy density, large capacity, high specific energy, stable working voltage, long service life, safe and reliable use, and rich raw materials, renewable utilization, cost-effective and non-polluting. It is a green energy. Both civil and military applications have good market application prospects. For example, it can be used for emergency lighting and communication in disa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/90H01M12/08
CPCH01M4/9041H01M12/08Y02E60/10
Inventor 符冬菊田勇叶利强韩晓鹏张维丽闵杰陈建军
Owner RESEARCH INSTITUTE OF TSINGHUA UNIVERSITY IN SHENZHEN
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