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Preparation method and application of as-cast magnesium alloy anode material

A technology for anode materials and magnesium alloys, applied in the field of anode materials for magnesium-air batteries, to achieve the effects of inhibiting self-corrosion hydrogen evolution reaction, increasing active sites, and improving casting performance

Inactive Publication Date: 2019-07-12
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve many problems existing in existing magnesium anode materials, the present invention provides a preparation method and application of cast magnesium alloy anode materials

Method used

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  • Preparation method and application of as-cast magnesium alloy anode material
  • Preparation method and application of as-cast magnesium alloy anode material
  • Preparation method and application of as-cast magnesium alloy anode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A cast magnesium alloy anode material, the magnesium alloy chemical composition (mass percentage): 6% Al, 1% Ge, the balance is magnesium.

[0028] The preparation method of the cast magnesium alloy anode material preparation method comprises the following steps:

[0029] (1) Pretreat the magnesium ingots and aluminum ingots respectively: cut the magnesium ingots and aluminum ingots into small pieces of 100mm×30mm×20mm respectively, and remove the oxides and oil stains on the surface according to the conventional method, and then wash them with absolute ethanol After cleaning, dry at a temperature of 90°C to constant weight to obtain pretreated magnesium ingots and aluminum ingots;

[0030] (2) Pretreatment of germanium grains: remove oxides and oil stains on the surface of germanium grains according to conventional methods, then clean them with absolute ethanol, and dry them at a temperature of 90°C to constant weight to obtain the pretreated germanium grains. Treated...

Embodiment 2

[0035] A cast magnesium alloy anode material, the alloy product is composed of the following components in weight percentage (g / g): 6% Al, 3% Ge, and the balance is magnesium.

[0036] The preparation steps are as in Example 1.

Embodiment 3

[0038] A cast magnesium alloy anode material, the alloy product is composed of the following components in weight percentage (g / g): 6% Al, 5% Ge, and the balance is magnesium.

[0039] The preparation steps are as in Example 1.

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Abstract

The invention relates to the field of anode materials of magnesium-air batteries, in particular relates to a preparation method and application of an as-cast magnesium alloy anode material. The preparation method comprises the following steps that (1) a magnesium ingot and an aluminum ingot are pre-treated separately; (2) germanium particles are pre-treated; (3) the pre-treated magnesium ingot andthe pre-treated aluminum ingot are molten; (4) the germanium particles are added after the magnesium ingot and the aluminum ingot to obtain melt, and heat preserving is conducted; and (5) the melt iscast, and cast ingots are naturally cooling to room temperature so as to obtain the as-cast magnesium alloy anode material, wherein the as-cast magnesium alloy anode material is composed of the following components of, by weight, 1-9% of Al, 1-6% of Ge and the balance magnesium. According to the magnesium alloy anode material, the anode material of the air battery with excellent comprehensive discharge performance is obtained by virtue of the synergistic effect of the alloy elements Al and Ge; and the magnesium alloy anode material has discharge potential of minus 1.589-minus 1.608V and the discharge efficiency of 64.2%-67.8% when the current density is 60 mA.cm<-2>.

Description

technical field [0001] The invention relates to the field of anode materials for magnesium-air batteries, in particular to a preparation method and application of cast magnesium alloy anode materials. Background technique [0002] The standard electrode potentials of magnesium in acidic and alkaline media are -2.37V and -2.69V respectively, and the theoretical electrochemical equivalent of magnesium is 2.20Ah g -1 , so Mg is an ideal anode material in air batteries. Magnesium-air battery is a new type of semi-fuel cell. It uses magnesium anode as the active material and reacts with oxygen diffused through the cathode in the air to discharge. It has low cost, non-toxic, non-polluting, high specific power, and specific energy. Advanced advantages. Magnesium-air batteries are used as portable power sources in various small electronic products, such as mobile phones, video game consoles, digital cameras, laptop computers, etc.; as small and medium-sized mobile power sources fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/02C22C1/02H01M4/86H01M12/06
CPCC22C1/02C22C23/02H01M4/8652H01M12/06
Inventor 侯利锋刘笑达卫英慧阴明杜华云刘宝胜
Owner TAIYUAN UNIV OF TECH
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