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Ferrotitanium-based hydrogen storage alloy

A hydrogen storage alloy and ferro-titanium technology, which is applied in the field of hydrogen storage alloy materials and hydrogen storage materials, can solve problems such as the reduction of effective hydrogen storage capacity of the alloy, the tilt of the hydrogen absorption and release platform of the alloy, and the unfavorable application of hydrogen storage alloys, etc., to achieve activation performance Improvement, flat hydrogen absorption and desorption platform, and good kinetic performance

Inactive Publication Date: 2016-07-20
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

While traditional element substitution or addition improves the activation performance of the alloy, other hydrogen storage properties of the alloy will also be affected. For example, the hydrogen absorption and desorption platform of the alloy will become inclined, and the effective hydrogen storage capacity of the alloy will decrease, which is not conducive to Practical applications of hydrogen storage alloys
Chen Changpin and others (Chinese patent CN1091157C) invented Ti1+xFe+ywt.%M alloy, where 0<x<0.3; 0<y<8; M is Mm, Ml , La, Ce, Pr, Nd, Sm, Li, Mg and Ca and other metals, this alloy has good activation performance, and the hydrogen storage capacity is above 1.7wt.%, but the hydrogen absorption and desorption platform of the alloy Severe tilt

Method used

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  • Ferrotitanium-based hydrogen storage alloy
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Hydrogen storage alloy TiFe 0.85- mn 0.15 Ce 0.02 Weigh 50g of the raw material according to the weight percentage determined by the alloy formula, and the purity of the metal element used in the experiment is all above 99%. The above raw materials were cleaned and placed in an induction suspension melting furnace, evacuated and smelted in a 0.05MPa argon atmosphere. In order to ensure uniform composition of the alloy, smelting was performed three times. Crush the sample to -30~+80 mesh, then take 2g of the sample and put it in the reaction kettle. Vacuumize the reactor at 353K for 1 hour, and then fill it with 4MPa hydrogen, the alloy can react directly with hydrogen, and the alloy can be fully activated after repeated hydrogen absorption and desorption for 2 times. It is measured that the maximum hydrogen storage capacity of the alloy reaches 1.78wt.% at 298K, 4MPa.

Embodiment 2

[0021] Hydrogen storage alloy TiFe 0.9- mn 0.1 Ce 0.02 Weigh 50g of the raw material according to the weight percentage determined by the alloy formula, and the purity of the metal element used in the experiment is all above 99%. The above-mentioned raw materials were cleaned and placed in a medium-frequency induction suspension melting furnace, and then smelted in a 0.05MPa argon atmosphere after exhausting. In order to ensure the uniform composition of the alloy, the alloy was smelted three times. Crush the smelted sample to -30~+80 mesh, and then take 2g of the sample and put it in the reaction kettle. The reactor was evacuated at 353K for 1 hour, and then filled with 4MPa hydrogen, the alloy could react directly with hydrogen, and the alloy could be fully activated after repeated absorption and desorption of hydrogen for 5 times. It is measured that the alloy has a maximum hydrogen storage capacity of 1.73wt.% at 298K and 4MPa, and its PCT curve is as follows figure 1 ...

Embodiment 3

[0023] Hydrogen storage alloy TiFe 0.9- mn 0.1 Ce 0.06 Weigh 50g of the raw material according to the weight percentage determined by the alloy formula, and the purity of the metal element used in the experiment is all above 99%. The above raw materials were cleaned and placed in an induction suspension melting furnace, evacuated and smelted in a 0.05MPa argon atmosphere. In order to ensure the uniform composition of the alloy, the alloy was smelted three times. Crush the sample to -30~+80 mesh, then take 2g of the sample and put it in the reaction kettle. Vacuumize the reactor at 353K for 1 hour, and then fill it with 4MPa hydrogen, the alloy can react directly with hydrogen, and the alloy can be fully activated after repeated hydrogen absorption and desorption for 4 times. It is measured that the maximum hydrogen storage capacity of the alloy is 1.71wt.% at 298K, 4MPa.

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Abstract

The invention relates to a ferrotitanium-based hydrogen storage alloy and belongs to the technical field of hydrogen storage alloy materials. The ferrotitanium-based hydrogen storage alloy has a general chemical formula of TiFe(1-x)MnyCozCen, wherein x is larger than 0 but smaller than or equal to 0.20, x is the sum of y and z, y is larger than 0 but smaller than or equal to 0.15, z is larger than or equal to 0 but smaller than or equal to 0.08, and n is larger than 0 but smaller than or equal to 0.10. The hydrogen storage alloy can be smelted by a vacuum medium-frequency sensing furnace; the smelted alloy can absorb hydrogen directly and has a good activation property; and a hydrogen absorbing and releasing platform of the alloy is flat, the hydrogen storage quantity is high, cost is low, and the alloy is particularly suitable for being applied to mobile or portable hydrogen storage devices such as a hydrogen purifier and a hydrogen fuel tank.

Description

technical field [0001] The invention relates to the technical field of hydrogen storage materials, in particular to a titanium-iron-based hydrogen storage alloy with good activation performance, high hydrogen storage capacity, flat hydrogen absorption and desorption platform, and low cost. The invention belongs to the technical field of hydrogen storage alloy materials. Background technique [0002] With the advancement of science and technology and the development of human society, the traditional fossil energy is increasingly exhausted, and the environmental problems caused by fossil energy are also becoming more and more serious. Due to the balance between energy use and environmental protection, people are paying attention to hydrogen energy. The preparation, storage, transportation and application of hydrogen are the three key technologies for the effective use of hydrogen energy. Since hydrogen is easy to gasify, catch fire, and explode, how to properly solve the prob...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C30/00C22C38/14C22C38/04C22C38/10
CPCC22C30/00C22C38/005C22C38/04C22C38/10C22C38/14
Inventor 李谦尹杰冷海燕任俊弛于之刚庞越鹏周国治
Owner SHANGHAI UNIV
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