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Mg alloy anode material and preparation method thereof

A technology of anode material and magnesium alloy, applied in the field of magnesium alloy anode material and its preparation, can solve the problems of low discharge activity, high use efficiency, low discharge voltage, etc., achieve excellent electrochemical performance, shorten processing cost, and shorten processing time Effect

Active Publication Date: 2016-09-07
HUNAN HYDRO DYNAMIC NEW MATERIAL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The common characteristics of the above-mentioned magnesium alloys used as anode materials are high potential, low hydrogen evolution, and less mud formation, which can be 100-300mAcm -2 Stable discharge under the current density, but the use efficiency is below 60%
At the same time, people have also tried to use pure magnesium, nano-sized magnesium particles, AZ31, AZ61, AZ91, AM50, AM60, Mg-Li alloy, etc. as anode materials for magnesium-air batteries; but the common characteristics of these anode materials are high potential and low hydrogen evolution rate. Low, high efficiency, but its discharge activity is low, only at a current density of 10mAcm -2 The following stable discharge, and the discharge voltage is very low (generally 1.3 ~ 0.8V)

Method used

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  • Mg alloy anode material and preparation method thereof
  • Mg alloy anode material and preparation method thereof
  • Mg alloy anode material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0052] Pure magnesium (Mg≧99.9%), alloying elements aluminum (Al≧99.9%), tin (Sn≧99.9%), according to the composition ratio: Al: 5%, Sn: 0.8%, Ce: 0.2%, the balance For magnesium, it is prepared into an alloy. First melt magnesium in a graphite crucible at a melting temperature of 750°C. After the magnesium alloy is completely melted, add alloy components aluminum and tin. After the alloy elements are melted, stir with a graphite rod for 10 minutes (min), and then add magnesium The cerium master alloy is stirred again with a graphite rod for 10 minutes (min), and at the same time, the temperature is controlled at 700 ° C, and it is still for 10 minutes (min), and poured into a steel mold with a preheating temperature of 250 ° C to obtain a cylindrical or It is a block casting billet.

[0053] The magnesium alloy anode material billet was subjected to homogenization annealing at 400° C. for 24 hours, so that the alloy components could be uniformly diffused at high temperature....

Embodiment 2

[0055] Pure magnesium (Mg≧99.9%), alloying elements aluminum (Al≧99.9%), tin (Sn≧99.9%), according to the composition ratio: Al: 5.8%, Sn: 0.9%, Ce: 0.3%, the balance For magnesium, it is prepared into an alloy. First melt magnesium in a graphite crucible at a melting temperature of 750°C. After the magnesium alloy is completely melted, add alloy components aluminum and tin. After the alloy elements are melted, stir with a graphite rod for 10 minutes (min), and then add Magnesium-cerium master alloy, stir again with graphite rod for 10 minutes (min), at the same time control the temperature at 700 ° C, stand still for 10 minutes (min), pour into a steel mold with a preheating temperature of 250 ° C, and obtain a cylindrical shape Or block cast ingots.

[0056] The magnesium alloy anode material billet was subjected to homogenization annealing at 450° C. for 24 hours, so that the alloy components could be uniformly diffused at high temperature. Preheat the evenly diffused mag...

Embodiment 3

[0058] Pure magnesium (Mg≧99.9%), alloying elements aluminum (Al≧99.9%), tin (Sn≧99.9%), according to the composition ratio: Al: 6.5%, Sn: 1.0%, Ce: 0.1%, the balance For magnesium, it is prepared into an alloy. First melt magnesium in a graphite crucible at a melting temperature of 750°C. After the magnesium alloy is completely melted, add alloy components aluminum and tin. After the alloy elements are melted, stir with a graphite rod for 10 minutes (min), and then add magnesium The cerium master alloy is stirred again with a graphite rod for 10 minutes (min), and at the same time, the temperature is controlled at 700 ° C, and it is still for 10 minutes (min), and poured into a steel mold with a preheating temperature of 250 ° C to obtain a cylindrical or It is a block casting billet.

[0059] The magnesium alloy anode material billet was subjected to homogenization annealing at 350°C for 24 hours, so that the alloy components could be diffused uniformly at high temperature....

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Abstract

The invention relates to a Mg alloy anode material and a preparation method thereof, and belongs to the technical field of development and preparation of novel anode materials for high-power chemical power sources. The Mg alloy anode material can be utilized as an anode material for a seawater battery or an air battery, and comprises the following chemical components in percentage by mass: 4-7% of Al, 0.5-1.5% of Sn, 0.05-0.5% of Ce, and the balance of Mg and impurities, wherein the total content of the impurities is lower than or equal to 0.01%. A Mg alloy plate being good in electrochemical property, relatively low in self-corrosion rate and high in anode efficiency is obtained by subjecting the Mg alloy anode material to such metal material machining processes as smelting, heat treatment, extrusion and rolling. The Mg alloy anode material provided by the invention has the advantages that the component design is reasonable, the preparation process is simple, the properties of the obtained product are good, and the large-scale industrialized application is facilitated.

Description

technical field [0001] The invention relates to a magnesium alloy anode material and a preparation method thereof, belonging to the technical field of development and preparation of new anode materials for high-power chemical power sources. Background technique [0002] As an anode material, magnesium metal has the characteristics of low density, large theoretical capacitance, negative potential, and low polarizability. Its standard electrode potential is -2.37V, which can reach -2.7V in neutral medium; therefore, it has high specific energy, and its theoretical specific energy reaches 6.8kW h kg -1 , second only to metal lithium and aluminum. However, metallic lithium is too active and difficult to store at room temperature, and aluminum anode materials must be in a high-concentration alkaline medium to exert the best discharge performance. [0003] China is rich in magnesium resources, with a complete range of ore types and a wide distribution range. The total reserves a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/02C22C1/03C22F1/06
CPCC22C1/03C22C23/02C22F1/06
Inventor 余琨熊汉青
Owner HUNAN HYDRO DYNAMIC NEW MATERIAL CO LTD
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