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Mg-Ni-La based composite hydrogen-storage alloy powder and preparation process thereof

A technology for hydrogen storage alloy powder and alloy, which is applied in the field of Mg-Ni-La-based composite hydrogen storage alloy powder and its preparation, can solve the problems of poor kinetic performance, slow hydrogen absorption and desorption rate, etc. The effect of increasing the contact area and simplifying the preparation process

Inactive Publication Date: 2013-09-25
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to overcome the shortcomings of slow hydrogen absorption and desorption rate and poor kinetic performance in the prior art, the present invention proposes a Mg-Ni-La based composite hydrogen storage alloy powder and its preparation method

Method used

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  • Mg-Ni-La based composite hydrogen-storage alloy powder and preparation process thereof
  • Mg-Ni-La based composite hydrogen-storage alloy powder and preparation process thereof
  • Mg-Ni-La based composite hydrogen-storage alloy powder and preparation process thereof

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Embodiment 1

[0043] This embodiment is a Mg-Ni-La based composite hydrogen storage alloy powder material, the Mg-Ni-La based composite hydrogen storage alloy powder is composed of Mg-Ni-La alloy strips and MWCNTs and TiF 3 Catalyst composition, M-Ni-La alloy ribbon: MWCNTs: TiF 3 =18:1:1, the ratio is a weight ratio.

[0044] In the alloy strip, the magnesium content is 67 at.%, the lanthanum content is 0-16.7 at.%, and the rest is nickel. The chemical formula of the alloy strip is Mg 2 Ni 1-x La x , 0≤x≤0.5, x=0 in this embodiment.

[0045] This embodiment also proposes a preparation method of the Mg-Ni-La based composite hydrogen storage alloy powder, the prepared Mg-Ni-La based composite hydrogen storage alloy powder is made of melt quenched Mg-Ni-La Alloy strips with addition of MWCNTs and TiF 3 It is obtained through a ball milling process and is a powder material, the particle shape of the powder material is irregular, and the particle size is within the range of 1-5um.

[004...

Embodiment 2

[0054] This embodiment is a Mg-Ni-La based composite hydrogen storage alloy powder material, the Mg-Ni-La based composite hydrogen storage alloy powder is composed of Mg-Ni-La alloy strips and MWCNTs and TiF 3 catalyst composition. M-Ni-La alloy ribbon: MWCNTs: TiF 3 =18:1:1, the ratio is a weight ratio.

[0055] The magnesium content in the alloy strip is 67 at.%, the lanthanum content is 0-16.7 at.%, and the rest is nickel. The chemical formula of the alloy strip is Mg 2 Ni 1-x La x , 0≤x≤0.5, x=0.1 in this embodiment.

[0056] This embodiment also proposes a method for preparing the Mg-Ni-La-based composite hydrogen storage material, the prepared Mg-Ni-La-based composite hydrogen storage alloy powder is made of Mg-Ni-La Alloy strips with addition of MWCNTs and TiF 3 It is obtained through a ball milling process and is a powder material, the particle shape of the powder material is irregular, and the particle size is within the range of 1-5um.

[0057] Step 1, alloy ...

Embodiment 3

[0066]This embodiment is a Mg-Ni-La based composite hydrogen storage alloy powder material, the Mg-Ni-La based composite hydrogen storage alloy powder is composed of Mg-Ni-La alloy strips and MWCNTs and TiF 3 Catalyst composition, M-Ni-La alloy ribbon: MWCNTs: TiF 3 =18:1:1, the ratio is a weight ratio.

[0067] The magnesium content in the alloy strip is 67 at.%, the lanthanum content is 0-16.7 at.%, and the rest is nickel. The chemical formula of the alloy strip is Mg 2 Ni 1-x La x , 0≤x≤0.5, x=0.3 in this embodiment;

[0068] This embodiment also proposes a preparation method of the Mg-Ni-La based composite hydrogen storage alloy powder material, the prepared Mg-Ni-La based composite hydrogen storage alloy powder is made of rapidly quenched Mg-Ni-La Alloy strips with addition of MWCNTs and TiF 3 Obtained through a ball milling process, it is a powder material, the shape of the powder material particles is irregular, and the particle size is within the range of 1-5um. ...

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Abstract

The invention discloses Mg-Ni-La based composite hydrogen-storage alloy powder and a preparation process thereof. The Mg-Ni-La based composite hydrogen-storage alloy powder is composed of Mg-Ni-La alloy strips and multi-walled carbon nanotubes (MWCNTs) and TiF3 catalysts. According to the Mg-Ni-La based composite hydrogen-storage alloy powder and the preparation process thereof, a melt rapid-quenching technology is used, a melt is ejected by the aid of the argon gas pressure and sprayed on surfaces of rotating smooth copper rods, by the aid of the quenching effect produced by the rotating copper rods, alloy structures are refined, and channels such as grain boundaries / phase boundaries, which are beneficial to diffusion of H atoms, are increased, so that amorphous / nano crystalline alloys are prepared. According to the Mg-Ni-La based composite hydrogen-storage alloy powder, the MWCNTs and the TiF3 catalysts are added simultaneously, rare earth La is added to improve the phase composition of Mg-Ni alloys, the formation of a new phase is beneficial to decomposition of H2 molecules on material surfaces and diffusion of the H atoms in materials, and the hydrogen absorption and desorption dynamic performance of Mg2Ni alloys is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of hydrogen storage alloy materials, and in particular relates to a Mg-Ni-La based composite hydrogen storage alloy powder and a preparation method thereof. Background technique [0002] The continuous development of energy has promoted the continuous progress of science and technology. However, the deterioration of the environment brought about by the use of energy has made human beings face severe challenges. At present, the two major problems of energy crisis and environmental pollution force people to seek new energy to drive people's life. Future new energy systems should be reliable, effective, clean, flexible and efficient. Considering carbon balance and zero emission of energy use, combined with factors such as transportation, utilization, efficiency, safety, and environmental compatibility, hydrogen energy is the best choice. To truly realize the "hydrogen economy", the preparation, storage and u...

Claims

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Application Information

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IPC IPC(8): B22F1/00C22C23/00C22C23/06C22C1/03C22C1/06B22D11/06
Inventor 李金山张铁邦侯小江寇宏超胡锐王军宋文杰唐斌
Owner NORTHWESTERN POLYTECHNICAL UNIV
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