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A Mg2NiH4 material and a preparing method thereof

A composite material, room temperature technology, applied in the fields of magnetic materials, inorganic material magnetism, chemical instruments and methods, etc., can solve problems such as the inability to achieve controllable generation of alloys, and achieve the effect of low density and excellent hydrogen release performance.

Active Publication Date: 2018-12-18
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Therefore, the prior art cannot realize Mg with only orthorhombic structure 2 NeH 4 The controllable formation of alloys has become a technical problem to be solved urgently

Method used

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  • A Mg2NiH4 material and a preparing method thereof
  • A Mg2NiH4 material and a preparing method thereof
  • A Mg2NiH4 material and a preparing method thereof

Examples

Experimental program
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Embodiment 1

[0027] In this example, see Figure 1 to Figure 5 , a Mg 2 NeH 4 material, Mg with orthorhombic structure at room temperature 2 NeH 4 Material.

[0028] A kind of present embodiment Mg 2 NeH 4 The preparation method of material, comprises the steps:

[0029] Step 1): the Mg obtained by smelting 2 After the Ni alloy powder is ball milled for 15 hours, it is loaded in the reaction kettle;

[0030] Step 2): Carry out the hydrogen storage alloy hydrogen absorption process, pass hydrogen gas into the reaction kettle in step 1), make the hydrogen pressure in the reaction kettle 2.0MPa, heat to 350°C and keep warm for 2 hours;

[0031] Step 3): keep the temperature of the reaction kettle in step 2) constant, pump the reaction kettle to vacuum, and maintain the vacuum state for 1 hour to obtain the hydrogen storage alloy product;

[0032] Step 4): Take out the hydrogen storage alloy product in the reactor in step 3), and then repeat step 1) and step 2) successively for 0 time...

Embodiment 2

[0042] This embodiment is basically the same as Embodiment 1, especially in that:

[0043] In this example, a Mg 2 NeH 4 The preparation method of material, comprises the steps:

[0044] Step 1): the Mg obtained by smelting 2 After the Ni alloy powder is ball milled for 30 hours, it is loaded in the reaction kettle;

[0045] Step 2): Carry out the hydrogen storage alloy hydrogen absorption process, pass hydrogen gas into the reaction kettle in step 1), make the hydrogen pressure in the reaction kettle 2.7MPa, heat it to 320°C and keep it warm for 1h;

[0046] Step 3): keep the temperature of the reaction kettle in step 2) constant, pump the reaction kettle to vacuum, and maintain the vacuum state for 2 hours to obtain the hydrogen storage alloy product;

[0047] Step 4): Take out the hydrogen storage alloy product in the reaction kettle in step 3), and then repeat the process times of step 1) and step 2) one time, when repeating the process of step 1) and step 2), make Th...

Embodiment 3

[0051] This embodiment is basically the same as the previous embodiment, and the special features are:

[0052] In this example, a Mg 2 NeH 4 The preparation method of material, comprises the steps:

[0053] Step 1): the Mg obtained by smelting 2 After the Ni alloy powder is ball milled for 10 hours, it is loaded in the reaction kettle;

[0054] Step 2): Carry out the hydrogen storage alloy hydrogen absorption process, pass hydrogen gas into the reaction kettle in step 1), make the hydrogen pressure in the reaction kettle 3.5MPa, heat it to 360°C and keep it warm for 1.5h;

[0055] Step 3): keep the temperature of the reaction kettle in step 2) constant, pump the reaction kettle to vacuum, and maintain the vacuum state for 1.5 hours to obtain the hydrogen storage alloy product;

[0056] Step 4): Take out the hydrogen storage alloy product in the reactor in step 3), then repeat the process times of step 1) and step 2) twice, when repeating the process of step 1) and step 2)...

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Abstract

A Mg2NiH4 material and a preparing method thereof are disclosed. The Mg2NiH4 material is a Mg2NiH4 material having an orthogonal structure at room temperature. The method includes firstly subjecting Mg2Ni alloy powder obtained by smelting to ball milling treatment, adding the alloy powder into a reaction kettle, feeding hydrogen into the reaction kettle, heating the reaction kettle to a certain temperature, then maintaining the temperature, vacuumizing the reaction kettle with the temperature of the reaction kettle unchanged, repeating ball milling and hydrogen absorption steps, and finally cooling the reaction kettle to room temperature to obtain a Mg2NiH4 powder material. An embodiment of the method achieves controllable generation of the Mg2NiH4 only having the orthogonal structure, andthe prepared Mg2NiH4 material having the orthogonal structure shows a ferromagnetic property so as to allow application of Mg2NiH4 as a magnetic material to be possible, and has excellent hydrogen release performance. The Mg2NiH4 having the single structure that is adopted as a hydrogen storage alloy has a wide application prospect in the field of magnetic materials.

Description

technical field [0001] The invention relates to a magnesium-based hydrogen storage alloy and a preparation method thereof, in particular to a Mg 2 A Ni type hydrogen storage alloy and a preparation method thereof are applied in the technical field of hydrogen storage materials. Background technique [0002] Magnesium-based hydrogen storage alloys have the advantages of high hydrogen storage capacity, small specific gravity, abundant resources and little environmental pollution, among which Mg 2 Ni alloy has the equivalent of LaNi 5 It has three times the weight of hydrogen storage capacity, high resistance to overcharge and overdischarge, and high charge-discharge rate, so it is attracting attention as a next-generation hydrogen storage material. Currently commonly used preparation of Mg 2 NeH 4 The method is the hydrogenation combustion synthesis method (T.Akiyama, H.Isogai, J.Yagi, J.Alloy Compd.1997,252:L1-L4.), which is carried out under the condition that the furnac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B3/00H01F1/03
CPCH01F1/0306C01B3/0042Y02E60/32
Inventor 李谦蔡奇时雨
Owner SHANGHAI UNIV
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