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Y-Fe-based rare-earth hydrogen storage material and preparation method thereof

A hydrogen storage material and rare earth technology, which is applied in the field of Y-Fe-based rare earth hydrogen storage material and its preparation, can solve the problems of limitation and large price fluctuation of Ni, and achieves fast hydrogen absorption rate, small price fluctuation and low activation temperature. Effect

Inactive Publication Date: 2018-06-29
GRIMAT ENG INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The main types of rare earth hydrogen storage alloys are AB 5 Type, AB 3 、A 2 B 7 and A 5 B 19 These alloys are mainly Ni-based alloys. Due to the large fluctuations in Ni prices this year, their use in large-scale hydrogen storage applications is limited

Method used

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  • Y-Fe-based rare-earth hydrogen storage material and preparation method thereof
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  • Y-Fe-based rare-earth hydrogen storage material and preparation method thereof

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Effect test

Embodiment 1

[0029] The raw materials are Y (purity ≥ 99.6%), Fe (purity ≥ 99.5%), and the chemical composition is YFe 3 . The alloy adopts a medium-vacuum medium-frequency induction furnace. When the melting temperature reaches 1600-1800°C, the alloy is completely melted and then refined for 10-30 minutes. Water-cooled mold is used for pouring and rapid solidification to obtain ingots. The pouring temperature is 1550-1750°C; the ingots are broken under the protection of argon atmosphere, and the alloy particles smaller than 30-400 meshes are screened; the alloy particles are heated to 300°C under vacuum conditions. Activate for 60 minutes, then cool to 25°C for hydrogen absorption. The experimental results show that the alloy has a multiphase structure, such as figure 1 shown. The experimental results show that the alloy is a multiphase structure, containing AB 2 (MgCu 2 type), AB 3 (PuNi 3 type) and A 6 B 23 (Th 6 mn 23 type) structure, the main phase structure is A 6 B 23 ,...

Embodiment 2

[0031] The raw materials are Y (purity ≥ 99.6%), Fe (purity ≥ 99.5%), and the chemical composition is YFe 3 . The alloy adopts a medium-vacuum medium-frequency induction furnace. When the melting temperature reaches 1600-1800°C, the alloy is completely melted and then refined for 10-30 minutes. Water-cooled mold casting is used to solidify quickly to obtain ingots. The pouring temperature is 1550-1750°C; the ingots are annealed under the protection of argon atmosphere, the annealing temperature is 1100°C, and the annealing time is 72 hours; the alloy is broken under the protection of argon atmosphere. Alloy particles smaller than 30-400 mesh are screened; the alloy particles are heated to 300°C under vacuum conditions, activated for 60 minutes, and then cooled to 25°C for hydrogen absorption. The hydrogen absorption kinetics test results of the alloy are as follows: image 3 shown. The experimental results show that the alloy is a multiphase structure, containing AB 2 (MgC...

Embodiment 3

[0034] The raw materials are Y (purity ≥ 99.6%), Sm (purity ≥ 99.0%), Fe (purity ≥ 99.5%), and the chemical composition is Y 0.65 Ce 0.35 Fe 3 . The alloy adopts a medium-vacuum medium-frequency induction furnace. When the melting temperature reaches 1600-1800°C, the alloy is completely melted and then refined for 10-30 minutes. Casting in a water-cooled mold, rapid solidification to obtain ingots, the pouring temperature is 1550-1750°C; the ingots are annealed under the protection of argon atmosphere, the annealing temperature is 1200°C, and the annealing time is 108 hours; the ingots are broken under the protection of argon atmosphere , screened to obtain alloy particles smaller than 30-400 mesh; the alloy particles were heated to 250°C under vacuum conditions, activated for 60 minutes, and then cooled to 25°C for hydrogen absorption. The experimental results show that the alloy is a multiphase structure, containing AB 2 (MgCu 2 type), AB 3 (PuNi3 type) and A 6 B 23 ...

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Abstract

The invention discloses a Y-Fe-based rare-earth hydrogen storage material and a preparation method thereof. The component composition of the hydrogen storage material is Y1-xMxFe3-yNy, wherein x is not less than 0 and not greater than 0.5; y is not less than 0 and not greater than 1.5; M is one or more than two of La, Ce, Pr, Nd, Sm, Gd, Zr, Ti and Mg; and N is one or more than two of Ni, Co, Al,Mn and Ca. The preparation method thereof comprises the following steps: (1) material preparation: weighing pure metals or the alloys thereof according to the chemical composition components separately, carrying out cleaning treatment on the raw materials, and then carrying out roasting degassing; (2) smelting: smelting through a vacuum medium-frequency induction smelting furnace or a vacuum electric-arc furnace; (3) pouring: rapidly condensing to obtain a cast ingot in a manner of water-cooling die pouring or vacuum suction casting; and (4) crushing the cast ingot under the protection of argon gas atmosphere, and sieving to obtain a particle powder with a particle size of 30-40 meshes. The hydrogen storage material disclosed by the invention is low in activation temperature, high in hydrogen absorption speed, and applicable to many fields of energy storage, hydrogen purification and the like. Compared with La-Ni-series hydrogen storage materials, Fe is lower in price fluctuation thanNi and lower in material cost.

Description

technical field [0001] The invention relates to a Y-Fe-based rare earth hydrogen storage material and a preparation method thereof. Background technique [0002] The hydrogen energy system mainly includes hydrogen production, hydrogen storage, hydrogen transportation and hydrogen utilization technologies. The key technology to realize the hydrogen economy In addition to developing cheap and efficient hydrogen production technology, another problem is to develop safe and efficient hydrogen storage technology. So far, hydrogen storage can use physical methods and chemical methods. Physical methods include: liquid hydrogen storage, high-pressure hydrogen storage, activated carbon adsorption storage, carbon fiber and carbon nanotube storage, glass microsphere storage, underground cavern storage, etc. Chemical methods include: metal hydride storage, organic liquid hydride storage, inorganic storage, ferromagnetic material storage, etc. Among them, metal hydride hydrogen storag...

Claims

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Application Information

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IPC IPC(8): C22C30/00C22C1/02
CPCC22C30/00C22C1/02
Inventor 蒋利军杨康苑慧萍辛恭标
Owner GRIMAT ENG INST CO LTD
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