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Ordered porous hydrogen storage alloy and preparation method thereof

A hydrogen storage alloy and alloy technology, applied in the field of ordered porous hydrogen storage alloy and its preparation, can solve the problems of high cost, low productivity, complicated process, etc., and achieve the effect of low cost, high productivity and simple process

Inactive Publication Date: 2012-07-11
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the disclosed methods, the hydrogen storage performance is generally improved by adding alloying elements and mechanical alloying, and the process is complicated, the preparation cycle is long, the productivity is low, and the cost is high.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Put 0.45kg of pure Mg charge in 1×10 -1 Under the vacuum of Pa, 2×10 5 Melt Mg after Pa argon, then control the temperature of the Mg solution to 740°C, then add Ni with a mass of 0.55 kg in the Mg solution, and keep it warm for 30 minutes to slowly dissolve Ni in the Mg solution to obtain a Mg-Ni alloy solution;

[0021] (2) Pass 4×10 into the Mg-Ni alloy liquid obtained in step (1) 5 Pa hydrogen, then keep warm at 790°C for 30 minutes to fully dissolve the hydrogen into the Mg-Ni alloy liquid;

[0022] (3) Keep the pressure at 6×10 5 Under Pa, the Mg-Ni alloy liquid obtained in step (2) is poured into the crystallizer with a radial heating temperature of 790°C and an axial bottom forced cooling temperature of 10°C, and at the same time, the crystallizer is moved out of the resistor The heating ring is used to control the solidification of the Mg-Ni alloy liquid along the axial direction to obtain an ordered porous hydrogen storage alloy ingot;

[0023] (4) Aft...

Embodiment 2

[0025] (1) Put 1.0kg of pure Mg charge in 2×10 -1 Pa vacuum, and then into 3 × 10 5 Melt the Mg after the argon gas of Pa, then control the temperature of the Mg liquid at 740°C and keep it warm for 60 minutes;

[0026] (2) Pass 7×10 into the Mg alloy solution obtained in step (1) 5 Pa hydrogen, then keep it warm at 750°C for 30 minutes to fully dissolve the hydrogen into the Mg alloy liquid;

[0027] (3) Keep the pressure at 1×10 6 Under Pa, the Mg alloy liquid obtained in step (2) was poured into the crystallizer with a radial heating temperature of 750°C and an axial bottom forced cooling temperature of 20°C, and at the same time, the crystallizer was moved out of the resistance heating ring at a speed of 200 μm / s To control the solidification of the Mg alloy liquid along the axial direction, an ordered porous hydrogen storage alloy ingot is obtained;

[0028] (4) After slicing, cleaning and drying the ordered porous hydrogen storage alloy ingot obtained in step (3), th...

Embodiment 3

[0030] (1) Put 0.65kg of pure Mg charge under vacuum, and then pass in 0Pa of argon gas to melt Mg, then control the temperature of Mg liquid at 730°C, then add 0.35kg of Ni, and keep it warm for 90min to slowly dissolve Ni in the Mg-Ni alloy liquid is obtained in the Mg liquid;

[0031] (2) Pass hydrogen gas of 0 Pa into the Mg-Ni alloy liquid obtained in step (1), and then keep it at 820°C for 10 minutes to fully dissolve the hydrogen into the Mg-Ni alloy liquid;

[0032] (3) Keeping the pressure at 0 Pa, pour the Mg-Ni alloy solution obtained in step (2) into a crystallizer with a radial heating temperature of 850°C and an axial bottom forced cooling temperature of 0°C, while controlling the Mg-Ni alloy The liquid solidifies along the axial direction to obtain an ordered porous hydrogen storage alloy ingot;

[0033] (4) After slicing, cleaning and drying the ordered porous hydrogen storage alloy ingot obtained in step (3), the ordered porous hydrogen storage alloy is obtai...

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Abstract

The invention provides ordered porous hydrogen storage alloy and a preparation method thereof, wherein pure Mg charging is arranged in vacuum, Mg is melted down after argon gas is pumped in, the temperature of Mg liquid is controlled and then Ni is added, and heat preservation is performed so as to lead Ni to dissolve in Mg liquid slowly, so that Mg-Ni alloy liquid is obtained; then hydrogen is pumped in and heat preservation is performed, so that hydrogen can dissolve in Mg-Ni alloy liquid fully; pressure is maintained, mixed liquor is poured in a crystallizer adopting radial heating and forced cooling for the axial bottom, and Mg-Ni alloy liquid is controlled to curdle in the axial direction at the same time, so that ordered porous hydrogen storage alloy ingots are obtained; ordered porous hydrogen storage alloy is obtained after the ordered porous hydrogen storage alloy ingots are sliced, cleaned and dried; the mass percentage of Ni ranges from 0 to 55 percent, and the rest is Mg and other inevitable impurity elements; in addition, regular holes in ordered arrangement are formed in the inner part of ordered porous hydrogen storage alloy, the diameter of each hole ranges from 0.1 to 3000 micrometers, and the porosity factor ranges from 0 to 60 percent.

Description

technical field [0001] The invention relates to an ordered porous hydrogen storage alloy and a preparation method thereof, belonging to the field of energy materials. Background technique [0002] Hydrogen has large reserves, no pollution and high energy density. Since the outbreak of the global oil crisis in the 1970s, the research and application development of hydrogen energy has developed by leaps and bounds. However, hydrogen is gaseous and flammable at room temperature. In order to better utilize hydrogen energy, solving its storage and conversion is the key to the problem. [0003] Hydrogen storage alloys play an important role in the storage and conversion of hydrogen, and are also key materials for fuel cells. It must have a high degree of hydrogen absorption and desorption reversibility under certain pressure and temperature conditions. [0004] Among the developed rare earth, titanium, zirconium, magnesium and other hydrogen storage alloys, the magnesium-based h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/08C22C19/03C22C23/00C22C1/02
Inventor 黎振华周荣蒋业华金青林岑启宏周荣锋
Owner KUNMING UNIV OF SCI & TECH