Mg-based hydrogen storage material with metal oxide added and preparation method of Mg-based hydrogen storage material

An oxide and hydrogen storage technology, applied in nanotechnology for materials and surface science, hydrogen production, nanotechnology, etc., can solve the disadvantages of practical application of magnesium-based hydrogen storage alloys, low yield, high product activity and difficult preservation etc. to achieve good hydrogen storage kinetics and high hydrogen storage capacity

Inactive Publication Date: 2013-01-09
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the above reports, the hydrogen absorption rate of the product is slow, and the method for preparing magnesium-based nanopowder is also complicated, the product has high activity and is difficult to store, and the yield is low.
These are all unfavorable for the practical application of magnesium-based hydrogen storage alloys

Method used

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  • Mg-based hydrogen storage material with metal oxide added and preparation method of Mg-based hydrogen storage material
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  • Mg-based hydrogen storage material with metal oxide added and preparation method of Mg-based hydrogen storage material

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Effect test

Embodiment 1

[0023] Magnesium metal powder and added CeO 2 The powders are purchased commercially, and the purity of each raw material is more than 99.5%, and a 10g sample (CeO 2 The mass fraction is 3%) after being fully mixed in a mortar, compressed in a hydraulic tablet press to obtain a cylindrical block with a size of Ф2cm×h2cm and a pressure range of 15-25MPa, which is used as an anode.

[0024] The preparation of high-capacity magnesium-based hydrogen storage nanopowder is as follows: the block of magnesium metal and metal oxide is used as the anode, and the W rod is used as the cathode. Placed in DC arc plasma equipment, when the device is pumped to a vacuum of 5×10 -2 Pa, filled with argon to 0.7atm. Through the cooling water, the water pressure is 2-3MPa. A high-frequency arc starter is used to generate a plasma arc. Under the action of a high-temperature arc, the anode metal block melts and evaporates rapidly, and the metal vapor and gas molecules collide with each other, and...

Embodiment 2

[0026] Add metal oxide as Y 2 o 3, the purity of the raw material is more than 99.5%, and a 10g sample (Y 2 o 3 The mass fraction is 3.5%) after being fully mixed in a mortar, cold-pressed into a cylindrical block in a hydraulic tablet press, the size of the block is Ф2cm×h2cm, and the pressure range is 15-25MPa, which is used as an anode.

[0027] The preparation of high-capacity magnesium-based hydrogen storage nanopowder is as follows: the block of magnesium metal and metal oxide is used as the anode, and the W rod is used as the cathode. Placed in DC arc plasma equipment, when the device is evacuated to a vacuum lower than 5×10 -2 Pa, filled with argon 0.8atm. Through the cooling water, the water pressure is 2-3MPa. A high-frequency arc starter is used to generate a plasma arc. Under the action of a high-temperature arc, the anode metal block melts and evaporates rapidly, and the metal vapor collides with gas molecules, and finally deposits on the inner wall of the re...

Embodiment 3

[0029] Add metal oxide as Nb 2 o 5 , the purity of the raw material is above 99.5%, and a 10g sample (Nb 2 o 5 The mass fraction is 5%), after being thoroughly mixed in a mortar, cold-pressed into a cylindrical block in a hydraulic tablet press, the size of the block is Ф2cm×h2cm, and the pressure range is 15-25MPa.

[0030] The preparation of high-capacity magnesium-based hydrogen storage nanopowder is as follows: the block of magnesium metal and metal oxide is used as the anode, and the W rod is used as the cathode. Placed in DC arc plasma equipment, when the device is evacuated to a vacuum lower than 5×10 -2 Pa, filled with argon 0.8atm. Through the cooling water, the water pressure is 2-3MPa. A high-frequency arc starter is used to generate a plasma arc. Under the action of a high-temperature arc, the anode metal block melts and evaporates rapidly, and the metal vapor and gas molecules collide with each other, and finally deposit on the inner wall of the reaction cham...

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Abstract

The invention relates to Mg-based hydrogen storage nano-sized powder and a preparation method thereof. The hydrogen storage nano-sized powder is obtained by performing high-temperature melting and evaporation to mixture of magnesium metal and metal oxide and performing passivation. The metal oxide is one or more of yttrium oxide, cerium oxide, iron oxide, titanium oxide and niobium oxide. Weight percentage of the metal oxide is 0.1%-20%, and the balance is magnesium metal. The Mg-based hydrogen storage nano-sized powder has high hydrogen storage dynamics performance and high hydrogen storage capacity and can be stored stably in air, hydrogen absorption amount at about 300 DEG C reaches 7%, and hydrogen absorption amount at 350 DEG C within 100s reaches more than 5weight%.

Description

technical field [0001] The invention relates to a composite hydrogen storage material, in particular to a magnesium-based composite hydrogen storage material nanopowder added with metal oxides. Background technique [0002] Hydrogen energy is the ultimate energy source for human beings. It is inexhaustible and inexhaustible. However, the traditional high-pressure gaseous hydrogen storage and liquid hydrogen storage methods are dangerous, energy-consuming, and low in hydrogen storage capacity. Therefore, the safe and effective storage of hydrogen is a key link in the utilization of hydrogen energy. In recent years, hydrogen storage of metal-based materials in the form of solid state has been widely studied, and titanium-based, rare-earth-based, zirconium-based, vanadium-based solid solutions, and magnesium-based hydrogen storage alloys have been developed. However, titanium, rare earth, zirconium and vanadium hydrogen storage alloys all have the disadvantage of low hydrogen ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B3/02B82Y30/00
Inventor 邹建新龙胜曾小勤郭皓丁文江
Owner SHANGHAI JIAO TONG UNIV
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