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Ferrotitanium-based hydrogen-storage alloy

A technology of hydrogen storage alloy and ferro-titanium, which is applied in the field of hydrogen storage materials, can solve the problem of low hydrogen release, and achieve the effects of low cost, high hydrogen storage capacity, and large-scale application

Inactive Publication Date: 2007-11-07
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ma Jianxin et al. (Acta Metallica Sinica, 1999; Vol.35, P805) studied FeTi 1.3 (Mm) y The hydrogen storage performance of the alloy can be activated at room temperature without any activation treatment, but its hydrogen release amount is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Hydrogen storage alloy Ti 0.95 Zr 0.05 Fe 0.93 Cr 0.05 co 0.02 10 grams are weighed according to the weight percentage determined by the alloy formula, and the purity of the metal elemental raw materials used in the experiment is all above 99%. Melting is then carried out in a non-consumable vacuum electric arc furnace under an argon protective atmosphere. In order to ensure that the alloy composition is uniform, turn over and smelt 3-4 times. The sample is crushed mechanically to 50-100 mesh, and then the sample is put into a stainless steel reaction vessel. Activation: Vacuumize at 80°C for 2 hours, and then pass in 4Mpa of hydrogen. After about 30 minutes, it can be activated, and it can be fully activated after repeated hydrogen absorption and desorption for 3 times. The measured hydrogen storage capacity of the alloy is 226ml / g, and the hydrogen release capacity is 213ml / g.

Embodiment 2

[0020] Hydrogen storage alloy Ti 1.0 Zr 0.08 Fe 0.89 Cr 0.08 Ni 0.03 20 grams are weighed according to the weight percentage determined by the alloy formula, and the purity of the metal elemental raw materials used in the experiment is all above 99%. Melting is then carried out in a non-consumable vacuum electric arc furnace under an argon protective atmosphere. In order to ensure that the alloy composition is uniform, turn over and smelt 3-4 times. Take 10 grams of sample and mechanically pulverize it to 50-100 mesh, and then put the sample into a stainless steel reaction vessel. Activation: Vacuumize at 80°C for 2 hours, and then pass in 4Mpa of hydrogen. After about 30 minutes, it can be activated, and it can be fully activated after repeated hydrogen absorption and desorption for 3 times. The measured hydrogen storage capacity of the alloy is 221ml / g, and the hydrogen release capacity is 204ml / g.

Embodiment 3

[0022] Hydrogen storage alloy Ti 1.05 V 0.05 Fe 0.85 Cr 0.1 mn 0.05 30 grams are weighed according to the weight percentage determined by the alloy formula, and the purity of the metal elemental raw materials used in the experiment is all above 99%. Melting is then carried out in a non-consumable vacuum electric arc furnace under an argon protective atmosphere. In order to ensure that the alloy composition is uniform, turn over and smelt 3-4 times. Take 10 grams of sample and mechanically pulverize it to 50-100 mesh, and then put the sample into a stainless steel reaction vessel. Activation: Vacuumize at 80°C for 2 hours, then pass in 4Mpa hydrogen, activate after about 30 minutes, and complete activation by repeating hydrogen absorption and desorption for 2 times. The hydrogen storage capacity of the alloy was measured to be 223ml / g, and the hydrogen release capacity was 175ml / g.

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PUM

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Abstract

The present invention relates to one kind of TiFe-base hydrogen storing alloy in the chemical composition of Tix-yMyFe1-zCraNz, where, M is one of Zr, V and Nb, N is one of Ni, Co, Cu, Mo, Mn, Al and Sn, x is 1.0-1.3, y is 0.01-0.15, a is 0.01-0.2, and z is 0.01-0.1. The TiFe-base hydrogen storing alloy may be smelted in a non-self consuming vacuum arc furnace or a vacuum MF inducing furnace. It has easy activation, high reaction speed with hydrogen, maximum hydrogen storing capacity of 235 ml / g and low cost.

Description

technical field [0001] The invention relates to a titanium-iron-based hydrogen storage alloy, in particular to a titanium-iron-based hydrogen storage alloy with relatively high hydrogen storage capacity and low cost, belonging to the technical field of hydrogen storage materials. Background technique [0002] TiFe alloy is a typical representative of AB-type hydrogen storage alloy, which was first proposed by Reilly of the National Brookhaven Laboratory in the United States in 1974. TiFe has a large reversible hydrogen absorption and desorption capacity at room temperature and 20-50atm hydrogen pressure, and the decomposition pressure of the hydride is only about ten atmospheres, which is close to industrial practical applications; although the capacity of TiFe-based alloys decays during the hydrogen absorption and desorption cycle and produce pulverization, but the hydrogen absorption and desorption cycle life of this alloy in a closed container can reach more than 3,000 ti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C14/00C22C38/14C22C30/00C22C38/16
Inventor 张金龙方守狮孟祥海金航军林根文葛建生
Owner SHANGHAI UNIV
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