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Easy-to-activate RE-Ti-Fe alloy for fuel cell and preparation method thereof

A fuel cell and re-ti-fe technology, applied in the field of hydrogen storage alloys, can solve the problems that titanium-iron alloys have not been practically applied, and achieve the effects of abundant reserves, compensation for burning loss, and easy-to-master processes

Active Publication Date: 2021-02-23
中稀(山东)稀土开发有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although breakthroughs have been made in improving the activation performance, ferro-titanium alloys have not yet been used in practical applications, and the main challenge remains how to improve the activation performance of ferro-titanium alloys on an industrial scale.

Method used

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  • Easy-to-activate RE-Ti-Fe alloy for fuel cell and preparation method thereof
  • Easy-to-activate RE-Ti-Fe alloy for fuel cell and preparation method thereof
  • Easy-to-activate RE-Ti-Fe alloy for fuel cell and preparation method thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0022] The preparation method of the easily activated RE-Ti-Fe alloy for the above-mentioned fuel cell comprises the following steps:

[0023] Step 1, weighing and proportioning according to the designed atomic ratio of the chemical formula. Since rare earth elements have a low melting point and are easy to volatilize, therefore, the burning loss should be increased by 5%-10% when proportioning, preferably around 5%.

[0024] Step 2: Put the prepared raw materials in the zirconia crucible in order, place the pure iron rod vertically along the crucible wall, evenly spread the massive rare earth on the bottom of the crucible, place the electrolytic manganese on the top of the rare earth, and lay the sponge titanium on the Lumpy manganese top. Vacuum down to 1×10 -2 -5×10 -4 Pa, and then filled with 0.01-0.1 MPa high-purity argon protective gas, using induction heating for melting, the melting temperature is 1450-1650°C, and the temperature is adjusted according to the compos...

Embodiment 1

[0030] Example 1: Ti 1.1 Fe 0.85 mn 0.15 +0.5%wt.%La+0.5%wt.%Y;

Embodiment 2

[0031] Example 2: Ti 1.1 Fe 0.8 mn 0.2 +0.5%wt.%Ce+0.5%wt.%Sm;

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Abstract

The invention discloses an easy-to-activate RE-Ti-Fe alloy for a fuel cell and a preparation method thereof, and relates to the technical field of hydrogen storage alloys. The chemical formula of theeasy-to-activate RE-Ti-Fe alloy is Ti1.1Fe1-xMnx+y wt.%RE (RE=La, Ce, Y, Nd, Sm and Gd, 0<x<=0.4, and 0<y<=10), and the rare earth element RE is selected from at least two of La, Ce, Y, Nd, Sm and Gd.The preparation method comprises the steps of performing smelting by adopting induction heating under the protection of inert gas, pouring a molten alloy into a tundish, continuously spraying the molten alloy onto the surface of a water-cooled copper roller rotating at a certain speed through a nozzle at the bottom of the tundish to obtain a fast quenched alloy, then performing mechanical crushing in an airflow mill, and then performing ball milling in a ball mill. The preparation method is mainly characterized in that the ferrotitanium alloy with a high hydrogen storage capacity and a low price is adopted in composition design, the reserves of two main elements constituting the alloy are abundant in nature, the price is low, and thus large-scale application and popularization are facilitated; and through mechanical ball milling, the surface of the alloy is plastically deformed, and high-density crystal defects are formed.

Description

technical field [0001] The invention relates to the technical field of hydrogen storage alloys, in particular to an easily activatable RE-Ti-Fe alloy for fuel cells and a preparation method thereof. Background technique [0002] Since Reilly discovered ferro-titanium alloy in 1974, its excellent performance and low price have attracted great attention from all over the world. Many people believe that ferro-titanium can be combined with rare earth-based LaNi 5 Alloy comparable to another hydrogen storage material with broad application prospects. Titanium-iron-based hydrogen storage materials have high hydrogen storage capacity (1.9 wt.%H 2 ), with moderate hydrogen absorption and desorption temperature and pressure, rich element reserves and low price, it is very likely to be applied in vehicle fuel cells. [0003] However, one disadvantage of this alloy is that its activation is very difficult, requiring multiple cycles of hydrogen absorption and desorption at high tempe...

Claims

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Application Information

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IPC IPC(8): B22F9/04C22C30/00C22C38/00C22C38/04C22C38/14H01M4/90
CPCB22F9/04C22C30/00C22C38/14C22C38/04C22C38/005H01M4/9041B22F2009/041Y02E60/50
Inventor 高金良张羊换李军张薇冯旭东马晓辉房成
Owner 中稀(山东)稀土开发有限公司
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