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Nano titanium trifluoride catalyzed Mg-RE-Ni-Al-Ti-Co based hydrogen storing alloy and preparation method thereof

A hydrogen storage alloy and alloy technology are applied in the field of Mg-RE-Ni-Al-Ti-Co-based hydrogen storage alloy and its preparation, which can solve the problems of poor hydrogen absorption and desorption kinetics of the alloy, and achieve improved surface properties and improved Hydrogen absorption and desorption performance, improvement of hydrogen absorption and desorption capacity and the effect of kinetics

Active Publication Date: 2017-08-29
INNER MONGOLIA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the crystalline Mg 17 La 2 The alloy has almost no ability to desorb hydrogen at room temperature, and the hydrogen absorption and desorption kinetics of the alloy prepared by the conventional melting and casting process are extremely poor

Method used

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  • Nano titanium trifluoride catalyzed Mg-RE-Ni-Al-Ti-Co based hydrogen storing alloy and preparation method thereof
  • Nano titanium trifluoride catalyzed Mg-RE-Ni-Al-Ti-Co based hydrogen storing alloy and preparation method thereof
  • Nano titanium trifluoride catalyzed Mg-RE-Ni-Al-Ti-Co based hydrogen storing alloy and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0039] The invention provides a hydrogen storage alloy whose chemical formula is Mg 16 La 1.5 Y 0.5 NiAl 0.5 Ti 0.5 +50(wt)%Co+4(wt)%TiF 3 ; Wherein, select particle size to be 200 purpose cobalt powders, and the quality of Co accounts for Mg 16 La 1.5 Y 0.5 NiAl 0.5 Ti 0.5 50% of alloy mass; TiF 3 The mass accounts for Mg 16 La 1.5 Y 0.5 NiAl 0.5 Ti 0.5 4% of the alloy mass.

[0040] Using the preparation method provided by the present invention to prepare the hydrogen storage alloy of this embodiment includes the following steps:

[0041] S101: Select bulk metal magnesium, rare earth metal lanthanum and yttrium, metal nickel, metal aluminum and titanium; the purity of each metal is ≥99.5%, and the metal-based master alloy is polished to remove the surface oxide layer, and weighed according to the chemical dosage ratio. Take by weighing metal magnesium 1054.1g, metal lanthanum 564.8g, metal yttrium 120.5g, metal nickel 159.1g, metal aluminum 36.5g and metal ti...

Embodiment 2

[0047] The invention provides a hydrogen storage alloy whose chemical formula is Mg 16 LaSmNiAl 0.5 Ti 0.5 +50(wt)%Co+6(wt)%TiF 3 ; Wherein, select particle size to be 200 purpose cobalt powders, and the quality of Co accounts for Mg 16 LaSmNiAl 0.5 Ti 0.5 50% of alloy mass; TiF 3 The mass accounts for Mg 16 LaSmNiAl 0.5 Ti 0.5 6% of the alloy mass. In addition, according to Mg 16 LaSmNiAl 0.5 Ti 0.5 +50(wt)%Co+6(wt)%TiF 3 The raw materials were weighed, and then the alloy powder of this example was prepared by the method in Example 1.

Embodiment 3

[0049] The invention provides a hydrogen storage alloy whose chemical formula is Mg 16 La 1.5 Gd 0.5 NiAl 0.2 Ti 0.8 +50(wt)%Co+3(wt)%TiF 3 ; Wherein, select particle size to be 200 purpose cobalt powders, and the quality of Co accounts for Mg 16 La 1.5 Gd 0.5 NiAl 0.2 Ti 0.8 50% of alloy mass; TiF 3 The mass accounts for Mg 16 La 1.5 Gd 0.5 NiAl 0.2 Ti 0.8 3% of the alloy mass. In addition, according to Mg 16 La 1.5 Gd 0.5 NiAl 0.2 Ti 0.8 +50(wt)%Co+3(wt)%TiF 3 The raw materials were weighed, and then the alloy powder of this example was prepared by the method of Example 1.

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Abstract

The invention relates to a nano titanium trifluoride catalyzed Mg-RE-Ni-Al-Ti-Co based hydrogen storing alloy and a preparation method thereof. The hydrogen storing alloy has the following chemical composition: Mg18-x-yLaxREyNi2-z-mAlzTim+50(wt)%Co+n(wt)%TiF3, wherein x, y, z and m are atomic ratios; x is more than 1 and less than 3; y is more than 0.2 and less than 1; z is more than 0 and less than 1; m is more than 0 and less than 1; n is a mass percent of TiF3 accounting for Mg18-x-yLaxREyNi2-z-mAlzTim; n is more than 3 and less than 8; and RE comprises at least one of rare earth elements such as Ce, Nd, Y, Sm and Gd. The hydrogen storing alloy provided by the invention has high hydrogen storing capacity and excellent dynamics performance, and has high hydrogen absorption and desorption capacity at a low temperature. Moreover, the hydrogen absorption and desorption dynamics performance is greatly improved.

Description

technical field [0001] The invention relates to the technical field of hydrogen storage materials, in particular to a nano-TiF 3 Catalyzed Mg-RE-Ni-Al-Ti-Co based hydrogen storage alloy and its preparation method. Background technique [0002] Metal hydrides are considered to be ideal hydrogen fuel carriers for fuel cells due to their efficient and safe hydrogen storage properties, but the hydrogen storage capacity of currently commercialized hydrogen storage materials cannot meet the requirements of fuel cells. Magnesium-based alloys are recognized as the most potential hydrogen storage materials due to their high hydrogen storage density and extremely rich resources. where Mg 17 La 2 The hydrogen storage capacity of the type alloy is about 6wt%, which fully meets the capacity requirement of the fuel cell in terms of its hydrogen storage capacity. However, the crystalline Mg 17 La 2 The alloy has almost no ability to desorb hydrogen at room temperature, and the hydrog...

Claims

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Application Information

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IPC IPC(8): C22C30/00B22F1/00B22F9/04
CPCB22F1/0003B22F9/04C22C30/00C22C2202/04
Inventor 张羊换李保卫任慧平侯忠辉刘卓成翟亭亭
Owner INNER MONGOLIA UNIV OF SCI & TECH
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