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Multiphase hydrogen storage alloy with high hydrogen desorption efficiency and its preparation method and application

A high-efficiency technology for hydrogen storage alloys, applied in the field of hydrogen storage alloys, can solve the problems of low effective hydrogen desorption rate, and achieve the effects of simple production methods, easy activation, and high hydrogen storage capacity

Active Publication Date: 2020-07-14
INNER MONGOLIA UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The multi-phase hydrogen storage alloy with high hydrogen release efficiency of the present invention solves the problem of low effective hydrogen release rate of vanadium-titanium based solid solution alloys

Method used

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  • Multiphase hydrogen storage alloy with high hydrogen desorption efficiency and its preparation method and application
  • Multiphase hydrogen storage alloy with high hydrogen desorption efficiency and its preparation method and application
  • Multiphase hydrogen storage alloy with high hydrogen desorption efficiency and its preparation method and application

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Experimental program
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Effect test

Embodiment 1

[0030] Embodiment 1 proposes a multi-phase hydrogen storage alloy with high hydrogen release efficiency, and the hydrogen storage alloy is divided according to A:V 53 Ti 8 Cr 27 Fe 12 , B: Ti 28.00 V 22 Fe 31 Cr 19 , C:V 5.05 Ti 94.95 40g of the determined weight percentages of the alloy formula were weighed, and the metal elemental raw materials used in the experiment were all above 99.9%, and then smelted in a non-consumable vacuum electric arc furnace under an argon protective atmosphere. In order to ensure uniform composition, the alloy ingot was turned over and smelted 4 times, and then cooled to room temperature with the furnace. After the outer surface of the ingot is polished and polished, mechanically pulverize and sieve through 200 meshes, respectively weigh 18.50g of A alloy powder, 0.85g of B alloy powder, and 0.65g of C alloy powder. After mixing, mechanical ball mill for 2 hours, weigh and mix 2g of multi-phase hydrogen storage alloy powder was put into ...

Embodiment 2

[0032] The preparation method etc. are all the same as in Example 1, but the alloy proportion is different from that in Example 1, and the chemical formula of the alloy in Example 2 is according to A: V 51 Ti 9 Cr 28 Fe 12 , B: Ti 35 V 15 Fe 30 Cr 20 , C:V 2.77 Ti 97.23 The alloy formula is determined, respectively weighing 18.9g of A alloy powder, 0.16g of B alloy powder, and 0.94g of C alloy powder, and the PCT test data are listed in Table 1 below. The XRD diffraction pattern of the hydrogen storage alloy of embodiment 1-2 is as figure 1 shown.

[0033] Table 1 Alloy hydrogen storage properties

[0034]

[0035] C tot - saturated hydrogen absorption capacity (wt.%); C des —Hydrogen release amount (wt.%); S f is the tilt factor of the hydrogen release platform; P eq is the hydrogen release platform pressure (MPa); R is the hydrogen release rate (R=(C des / C tot )×100%).

[0036] The results of the data in Table 1 show that the hydrogen release efficiency ...

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Abstract

The invention relates to a high-hydrogen-release-efficiency multi-phase hydrogen storage alloy as well as a preparation method and application thereof. The hydrogen storage alloy is composed of a vanadium-titanium-based hydrogen storage alloy A, a titanium-iron-based hydrogen storage alloy B and a titanium-rich alloy C, wherein the chemical formula is x wt.% A + y wt.% B + z wt.% C, wherein x, y and z are mass ratios, x is greater than or equal to 90 and less than or equal to 95, y is greater than or equal to 0.5 and less than or equal to 4.5, and z is greater than or equal to 3 and less thanor equal to 5, x + y + z = 100. The high-hydrogen-release efficiency multi-phase hydrogen storage alloy solves the problem that the effective hydrogen release rate of the vanadium-titanium-based solidsolution alloy is low. The hydrogen storage alloy belongs to a vanadium-titanium-based solid solution alloy, and is composed of the vanadium-titanium-based hydrogen storage alloy A, the titanium-iron-based hydrogen storage alloy B and the titanium-rich alloy C. According to the method, the effective hydrogen release efficiency of the hydrogen storage alloy is higher than that of other vanadium-titanium-based solid solution hydrogen storage alloys, and the hydrogen storage alloy is easy to activate, high in hydrogen storage capacity, low in cost and simple in production method.

Description

technical field [0001] The invention belongs to the technical field of hydrogen storage alloys, and in particular relates to a multiphase hydrogen storage alloy with high hydrogen release efficiency and its preparation method and application. Background technique [0002] In the process of finding alternative energy solutions, using hydrogen as an energy carrier has become an option to compensate for the gradual consumption of fossil fuels and protect the environment because of its cleanliness and renewable nature. Hydrogen storage is a key issue in hydrogen utilization. As a hydrogen storage material, vanadium-based alloy has the advantages of high hydrogen storage density, good pulverization resistance, and hydrogen absorption and desorption under normal temperature and pressure. [0003] Therefore, in recent years, more and more researchers have conducted research on vanadium-based or vanadium-based solid solution alloys. In order to continuously improve the performance...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C30/00C22C14/00C22C27/02C22C1/04H01M4/38
CPCY02E60/10
Inventor 罗龙李丽荣李永治翟亭亭胡锋赵增武
Owner INNER MONGOLIA UNIV OF SCI & TECH
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