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Magnesium-based hydrogen storage alloy and preparation method thereof

A magnesium-based hydrogen storage alloy and alloy powder technology, which is applied in the field of hydrogen storage materials, can solve the problems that restrict the large-scale application and promotion of magnesium-based hydrogen storage alloys, slow hydrogen absorption and desorption rate, and poor hydrogen absorption and desorption performance, and achieve improved absorption and desorption. Hydrogen desorption performance, improving low-temperature hydrogen absorption and desorption capacity and hydrogen absorption and desorption rate, improving low-temperature hydrogen absorption and desorption performance and the effect of hydrogen absorption and desorption rate

Active Publication Date: 2019-06-18
三桥惠(佛山)新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the high stability of the phase structure of magnesium-based hydrogen storage alloys, the hydrogen absorption and desorption temperature is high, and the hydrogen absorption and desorption rate is relatively slow, especially at low temperatures. Large-scale application and promotion of hydrogen storage alloys

Method used

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  • Magnesium-based hydrogen storage alloy and preparation method thereof

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Effect test

Embodiment 1

[0025] A magnesium-based hydrogen storage alloy, which is made of Mg 2 Ni alloy powder made with nickel-coated carbon nanotubes, Mg 2 The weight ratio of Ni alloy powder to nickel-coated carbon nanotubes is 100:0.5.

[0026] Mg 2 The preparation method of Ni alloy powder is as follows: mix Mg and Ni powders with a purity of >99% according to the atomic ratio of 2:1 to obtain mixed metal powder, add the mixed metal powder into a ball mill tank, and then add stainless steel grinding balls, stainless steel grinding balls and all The weight ratio of the mixed metal powder is 1:0.05, put the ball mill jar into the planetary ball mill, and carry out ball milling at room temperature under the protection of argon, the ball milling time is 5h, and the speed is 300r / min, to obtain 2 Ni alloy powder.

[0027] The preparation method of nickel-coated carbon nanotubes is as follows: First, oxidize the multi-walled carbon nanotubes with a diameter of 10-20nm and a length of 5-10μm in a 4m...

Embodiment 2

[0034] A magnesium-based hydrogen storage alloy, characterized in that it is made of Mg 2 Ni alloy powder made with nickel-coated carbon nanotubes, Mg 2 The weight ratio of Ni alloy powder to nickel-coated carbon nanotubes is 100:0.8.

[0035] Mg 2 The preparation method of Ni alloy powder is as follows: mix Mg and Ni powders with a purity of >99% according to the atomic ratio of 2:1 to obtain mixed metal powder, add the mixed metal powder into the ball mill tank, and then add stainless steel grinding balls, stainless steel grinding balls and mix The weight ratio of the metal powder is 1:0.08, put the ball mill jar into a planetary ball mill, and carry out ball milling at room temperature under the protection of argon. 2 Ni alloy powder.

[0036] The preparation method of nickel-coated carbon nanotubes is as follows: First, oxidize the multi-walled carbon nanotubes with a diameter of 10-20nm and a length of 5-10μm in a 4.2mol / L sulfuric acid solution at 55°C for 25min, and ...

Embodiment 3

[0043] A magnesium-based hydrogen storage alloy, which is made of Mg 2 Ni alloy powder made with nickel-coated carbon nanotubes, Mg 2 The weight ratio of Ni alloy powder to nickel-coated carbon nanotubes is 100:1.

[0044] Mg 2 The preparation method of Ni alloy powder is as follows: mix Mg and Ni powders with a purity of >99% according to the atomic ratio of 2:1 to obtain mixed metal powder, add the mixed metal powder into the ball mill tank, and then add stainless steel grinding balls, stainless steel grinding balls and mix The weight ratio of the metal powder is 1:0.1, put the ball mill jar into the planetary ball mill, and carry out ball milling at room temperature under the protection of argon, the ball milling time is 1-h, and the speed is 500r / min to obtain Mg 2 Ni alloy powder.

[0045] The preparation method of nickel-coated carbon nanotubes is as follows: First, oxidize the multi-walled carbon nanotubes with a diameter of 10-20nm and a length of 5-10μm in a 4.5mol...

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Abstract

The invention discloses a magnesium-based hydrogen storage alloy and a preparation method thereof. The magnesium-based hydrogen storage alloy is prepared from raw materials of Mg2Ni alloy powder and nickel-plated carbon nano-tubes, wherein the weight ratio of the Mg2Ni alloy powder to the nickel-plated carbon nano-tubes is 100:(0.5-1). The preparation method includes the steps that the Mg2Ni alloypowder and the nickel-plated carbon nano-tubes are subjected to high-current electron beam pulse surface radiation pretreatment, then mechanical alloying is carried out through planet ball-milling, finally, high-current electron beam pulse surface radiation treatment is carried out, and the magnesium-based hydrogen storage alloy is obtained. The poor hydrogen heat absorption and release and dynamics performance of the magnesium-based hydrogen storage alloy is effectively improved, the low-temperature hydrogen absorption and release performance of the magnesium-based hydrogen storage alloy isgreatly improved, the hydrogen absorption and release rate of the magnesium-based hydrogen storage alloy is effectively increased, and thus the magnesium-based hydrogen storage alloy has higher practical application value.

Description

technical field [0001] The invention relates to the technical field of hydrogen storage materials, in particular to a magnesium-based hydrogen storage alloy and a preparation method thereof. Background technique [0002] Hydrogen is an important secondary energy source, which has the advantages of high combustion calorific value, abundant reserves, non-toxic and non-polluting, etc. Hydrogen energy technology has attracted extensive attention from researchers. Since the storage and conversion of hydrogen is the key to the effective utilization of energy, the development and utilization of efficient hydrogen storage materials has become an urgent technical problem to be solved. Hydrogen storage alloy is a new type of green functional material, which is composed of elements A (such as La, Zr, Mg, etc.) that are easy to form stable hydrides and other elements (Cr, Mn, Fe, Co, Ni, etc.) Compounds have the properties of hydrogen absorption and desorption under certain conditions,...

Claims

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Application Information

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IPC IPC(8): C22C23/00C22C1/05C22C1/10
Inventor 张虎钟喜春龙克文刘仲武余红雅
Owner 三桥惠(佛山)新材料有限公司
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