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Multielement ferrotitanium hydrogen storage alloy

A hydrogen storage alloy and ferro-titanium technology, which is applied in the field of hydrogen storage energy materials, can solve the problems of poor activation performance of hydrogen storage alloys, and achieve the effects of superior large-scale application, easy activation, and low cost

Inactive Publication Date: 2011-11-23
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the activation performance of TiFe-based hydrogen storage alloys is poor, and the hydrogen storage capacity still cannot meet the needs of continuous improvement in practical applications.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Hydrogen storage alloy Ti 1.0 Zr 0.05 Fe 0.95 Cr 0.04 Ni 0.02 Zn 0.005 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%. It 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 to 4 times. Take 5 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 1 hour, then pass in 4Mpa hydrogen, activate after 5 to 30 minutes, and fully activate after repeated hydrogen absorption and desorption for 4 times. The measured hydrogen storage capacity of the alloy is 213ml / g, and the hydrogen release capacity is 201ml / g.

Embodiment 2

[0020] Hydrogen storage alloy Ti 1.06 Zr 0.04 Fe 0.94 Cr 0.05 Ta 0.02 Al 0.01 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%. It 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 to 4 times. Take 5 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 1 hour, then pass in 4Mpa hydrogen, activate after 5 to 30 minutes, and fully activate after repeated hydrogen absorption and desorption for 4 times. The measured hydrogen storage capacity of the alloy is 220ml / g, and the hydrogen release capacity is 213ml / g.

Embodiment 3

[0022] Hydrogen storage alloy Ti 1.03 f 0.02 Fe 0.96 Cr 0.03 Ni 0.03 B 0.005 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%. It 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 to 4 times. Take 5 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 1 hour, then pass in 4Mpa hydrogen, activate after 5 to 30 minutes, and complete activation after repeated hydrogen absorption and desorption several times. The measured hydrogen storage capacity of the alloy is 205ml / g, and the hydrogen release capacity is 196ml / g.

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PUM

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Abstract

The invention relates to a multielement ferrotitanium hydrogen storage alloy which has a chemical composite: (Ti1-cLc)a(Fe1-x-y-zCrxMyNz)b; in the formula, L is one element of Zr, Hf and Mg, M is one element of Ni, Ta, W, Ce and Cu, N is one element of Nb, V, Zn, Al and B, a is not less than 0.9 and not more than 1.3, b is not less than 0.7 and not more than 1.1, c is not less than 0.005 and not more than 0.2, x is not less than 0.01 and not more than 0.4, y is not less than 0.005 and not more than 0.05, and z is not more than 0.005 and not more than 0.03. The multielement ferrotitanium hydrogen storage alloy can be smelted by a nonconsumable vacuum arc furnace and a vacuum intermediate frequency furnace, and the smelted alloy is easy to activate, has higher hydrogen storage capacity and low cost and is suitable for being used as a fuel cell hydrogen-source alloy.

Description

technical field [0001] The invention relates to a multi-component titanium-iron hydrogen storage alloy, in particular to a high hydrogen storage capacity and low-cost multi-component titanium-iron hydrogen storage alloy, which belongs to the technical field of hydrogen storage energy materials. Background technique [0002] Fuel cells are the most promising high-efficiency and clean power generation methods in this century. Fuel cells will have broad application prospects in electric vehicles, mobile power supplies, uninterruptible power supplies, submarines and space power supplies. With the rapid development and industrialization of fuel cells and electric vehicles, the research and construction of on-board hydrogen source technology and hydrogen energy infrastructure have attracted extensive attention from developed countries, and the development of fuel cells using hydrogen as fuel has been affected by its hydrogen source. technical constraints. Among the various hydrog...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/28C22C14/00C01B3/00
CPCY02E60/327Y02E60/32
Inventor 张金龙孟祥海李士炉金航军葛建生
Owner SHANGHAI UNIV