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TiFe hydrogen storage alloy containing Co and Y and preparation method thereof

A hydrogen storage alloy and alloy technology, applied in the field of hydrogen storage materials, can solve the problems of easy oxidation, difficult activation of TiFe alloys, unsatisfactory hydrogen storage capacity, etc. The effect of improving hydrogen release time and solving activation difficulties

Active Publication Date: 2017-12-29
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At the same time, the surface of TiFe alloy is easy to oxidize, the activation of TiFe alloy is difficult, and the hydrogen storage capacity at room temperature is not ideal.

Method used

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  • TiFe hydrogen storage alloy containing Co and Y and preparation method thereof
  • TiFe hydrogen storage alloy containing Co and Y and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] In this example, a TiFe hydrogen storage alloy with Co and Y added, its chemical formula is TiFe 0.86 mn 0.1 co 0.08 Y 0.02 .

[0022] In this embodiment, the preparation method of TiFe hydrogen storage alloy comprises the following steps:

[0023] a. According to TiFe 0.86 mn 0.1 co 0.08 Y 0.02 The molar ratio of the elements is respectively weighed Ti, Fe, Mn, Co and Y elemental metal materials with a purity of 99.9%, and the Ti, Fe, Mn, Co and Y elemental elements are used as raw materials;

[0024] b. Using the magnetic levitation smelting process, first put all the raw materials weighed in the step a into the crucible, feed the smelting crucible with high-purity argon gas with a purity of 99.9%, and wash the furnace 5 times, each time Fill the furnace with high-purity argon to make the atmosphere pressure in the furnace 0.6atm; in the magnetic levitation melting process, control the melting power up to 15KW, and slowly increase the melting power at a rate o...

Embodiment 2

[0029] This embodiment is basically the same as Embodiment 1, especially in that:

[0030] In this example, a TiFe hydrogen storage alloy with Co and Y added, its chemical formula is TiFe 0.86 mn 0.1 co 0.06 Y 0.04 .

[0031] In this embodiment, the preparation method of TiFe hydrogen storage alloy comprises the following steps:

[0032] a. According to TiFe 0.86 mn 0.1 co 0.06 Y 0.04 The molar ratio of the elements is respectively weighed Ti, Fe, Mn, Co and Y elemental metal materials with a purity of 99.9%, and the Ti, Fe, Mn, Co and Y elemental elements are used as raw materials;

[0033] b. Using the magnetic levitation smelting process, first put all the raw materials weighed in the step a into the crucible, feed the smelting crucible with high-purity argon gas with a purity of 99.9%, and wash the furnace 5 times, each time Fill the furnace with high-purity argon gas so that the atmosphere pressure in the furnace is 0.6atm; in the magnetic levitation melting proc...

Embodiment 3

[0038] This embodiment is basically the same as the previous embodiment, and the special features are:

[0039] In this example, a TiFe hydrogen storage alloy with Co and Y added, its chemical formula is TiFe 0.86 mn 0.1 co 0.08 Y 0.02 .

[0040] In this embodiment, the preparation method of TiFe hydrogen storage alloy comprises the following steps:

[0041] a. Use Ti-Fe-Mn as the master alloy, and use TiFe hydrogen storage alloy TiFe according to the target 0.86 mn 0.1 co 0.08 Y 0.02 Add Co material and Y material to Ti-Fe-Mn master alloy in molar ratio of element components as raw materials;

[0042] b. This step is the same as in Embodiment 1.

[0043] Experimental test analysis:

[0044] Grind the TiFe hydrogen storage alloy ingot prepared in Example 3 with sandpaper to remove the surface oxide layer, then mechanically grind and pulverize the alloy through a 200-mesh sieve to obtain hydrogen storage alloy powder and reserve it for later use. The density of the hy...

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Abstract

The invention discloses a TiFe hydrogen storage alloy containing Co and Y and a preparation method thereof. The chemical formula of the TiFe hydrogen storage alloy is TiFe0.86Mn0.1Co(0.1-x)Yx, wherein x is larger than or equal to 0.02 and smaller than or equal to 0.04. The novel TiFe0.86Mn0.1Co(0.1-x)Yx alloy is synthesized through a water-cooling copper crucible under the 99.9% high-purity argon environment. Through adding of Co and Y, the TiFe alloy is more easily activated and more easily absorbs hydrogen during first circulation. Meanwhile, the pressure of a hydrogen absorption and desorption platform of the alloy is low, and the slope of the hydrogen absorption and desorption platform is small. Under the temperature of 20 DEG C, the hydrogen storage quantity of the TiFe0.86Mn0.1Co0.06Y0.04 alloy reaches 1.95%(omega), and thus the TiFe0.86Mn0.1Co(0.1-x)Yx alloy is expected to provide efficient and practical hydrogen sources for equipment and production which take hydrogen as a raw material.

Description

technical field [0001] The invention relates to a hydrogen storage alloy and a preparation method thereof, in particular to a TiFe hydrogen storage alloy and a preparation method thereof, which will be applied in the technical field of hydrogen storage materials. Background technique [0002] With the further development of industrialization, carbon monoxide and carbon dioxide emissions have led to increased pollution and seriously affected the environment. China has ranked first in the world in terms of carbon dioxide emissions. To protect the environment from pollution and other dangerous pollutants, the move towards new energy sources is critical. Hydrogen is a potential candidate as a fuel source in various fields such as internal combustion engines and gas turbines. It has two advantages over other fuel systems: [0003] 1. No pollution and environmental protection; [0004] 2. Can be generated from other energy sources such as geothermal energy, solar energy and nuc...

Claims

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Application Information

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IPC IPC(8): C22C30/00C22C1/02
CPCC22C1/02C22C30/00
Inventor 李重河瓦杰德李凯周路海王世华
Owner SHANGHAI UNIV
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