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A rare earth metal hydride hydrogen storage alloy suitable for solid-state hydrogen storage and preparation method thereof

A technology of hydrogen storage alloys and hydrides, applied in chemical instruments and methods, non-metallic elements, hydrogen, etc., can solve the problems of small hysteresis, hysteresis in kinetic properties, low hydrogen storage capacity of alloys, etc., and achieve simple and stable operation and equipment , Process conditions are easy to control, and the effect of high volume hydrogen storage density

Active Publication Date: 2022-07-01
包头中科轩达新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Among the existing series of metal hydride hydrogen storage alloys, the hydrogen storage capacity of Mg-based alloys is the most advantageous, but the hydrogen absorption and desorption temperature is too high and the kinetic performance is sluggish, which restricts its large-scale application.
Although TiFe alloy has low manufacturing cost and high hydrogen storage capacity, it is difficult to activate and easy to poison
AB 5 Type hydrogen storage alloy is easy to activate, has fast hydrogen absorption and desorption speed, and small hysteresis, but the hydrogen storage capacity of the alloy is low

Method used

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  • A rare earth metal hydride hydrogen storage alloy suitable for solid-state hydrogen storage and preparation method thereof
  • A rare earth metal hydride hydrogen storage alloy suitable for solid-state hydrogen storage and preparation method thereof
  • A rare earth metal hydride hydrogen storage alloy suitable for solid-state hydrogen storage and preparation method thereof

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Embodiment 1

[0053] This embodiment provides a rare earth metal hydride hydrogen storage alloy suitable for solid-state hydrogen storage, and the composition of the hydrogen storage alloy is: Sm 0.92 Mg 0.08 Ni 4.11 Co 0.13 Al 0.06 , and its preparation method is carried out in sequence according to the following steps:

[0054] (11) batching: select metals Sm, Mg, Ni, Co, Al as raw materials, carry out batching according to the alloy chemical composition of the present embodiment, consider the volatilization loss in the preparation, and supplement the volatilization amount of the corresponding element during batching;

[0055] (12) Smelting: The as-cast alloy is prepared by induction melting method. Before melting, the furnace chamber is evacuated to 0.08MPa, and then high-purity argon gas is introduced to 0.01MPa; In order to ensure the uniformity of the alloy, the metal Mg is carried out by means of secondary feeding, and finally the alloy is cast into a water-cooled ingot mold, and...

Embodiment 2

[0064] This embodiment provides a rare earth metal hydride hydrogen storage alloy suitable for solid-state hydrogen storage, and the composition of the hydrogen storage alloy is: Nd 0.60 Ce 0.10 Ti 0.10 Mg 0.20 Ni 3.92 Co 0.05 Si 0.05 , and its preparation method is carried out in sequence according to the following steps:

[0065] (21) Batching: select metals Nd, Ti, Mg, Ni, Co, Si, Ce as raw materials, and perform batching according to the alloy chemical composition of the present embodiment. Considering the volatilization loss during preparation, the volatilization amount of the corresponding element is supplemented and increased during batching ;

[0066] (22) Smelting: The as-cast alloy is prepared by induction melting method. Before melting, the furnace chamber is evacuated to 0.08MPa, and then high-purity argon gas is introduced to 0.04MPa; In order to ensure the uniformity of the alloy, the metal Mg is carried out by means of secondary feeding, and finally the a...

Embodiment 3

[0075] This embodiment provides a rare earth metal hydride hydrogen storage alloy suitable for solid-state hydrogen storage, and the alloy composition is: Y 0.65 Sm 0.15 La 0.10 Mg 0.10 Ni 3.90 Co 0.10 Al 0.05 Mn 0.05 , and its preparation method is carried out in sequence according to the following steps:

[0076] (31) batching: select metals Y, Sm, La, Mg, Ni, Co, Al, and Mn as raw materials, and carry out batching according to the alloy chemical composition of the present embodiment. Considering the volatilization loss during preparation, the volatilization amount of the corresponding element is used for batching. supplementary increase;

[0077] (32) Smelting: The as-cast alloy is prepared by induction melting method. Before melting, the furnace chamber is evacuated to 0.08MPa, and then high-purity argon gas is introduced to 0.02MPa; In order to ensure the uniformity of the alloy, the metal Mg is carried out by means of secondary feeding, and finally the alloy is c...

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Abstract

The invention discloses a rare earth metal hydride hydrogen storage alloy suitable for solid-state hydrogen storage. The general chemical formula of the hydrogen storage alloy is R 1‑x‑y Mg x A y Ni z‑w‑v B w C v It has the advantages of easy activation, fast hydrogen absorption and desorption rate, and moderate hydrogen absorption and desorption platform pressure. It can be applied to low-pressure solid-state hydrogen storage equipment and hydrogen refueling station applications, and has the advantages of high safety, high volume hydrogen storage density and low cost. The present invention also provides a method for preparing the hydrogen storage alloy, which comprises the steps of batching, smelting and heat treatment to prepare the hydrogen storage alloy. The hydrogen storage performance is convenient for industrial production and application. The invention is suitable for preparing a rare earth metal hydride hydrogen storage alloy for solid hydrogen storage.

Description

technical field [0001] The invention belongs to the field of new energy materials, and relates to a rare earth metal hydride hydrogen storage alloy suitable for solid-state hydrogen storage and a preparation method thereof. Background technique [0002] With the continuous development of the world economy, the demand for energy is increasing. In order to solve the contradiction between economic development and energy demand, we must seek clean new energy to maintain sustainable economic development. As a secondary energy source with high combustion value, abundant reserves and clean and pollution-free energy, hydrogen energy is in line with the current social development demand for energy. Therefore, hydrogen energy has attracted more and more attention, and its related industries have also gained in recent years. developed rapidly. [0003] The popularization and promotion of hydrogen energy is inseparable from the storage and transportation of hydrogen. Due to its low d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C19/03C22C1/02C22F1/10C22F1/02C01B3/00
CPCC22C19/03C22C1/026C22F1/10C22F1/02C01B3/0057C01B3/0052C22C2202/04Y02E60/32
Inventor 张璐韩树民丛立安王文凤席宁胡羽洁菅璐
Owner 包头中科轩达新能源科技有限公司
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