Preparation method of mg-re-ni-al-ti-co based hydrogen storage alloy catalyzed by nano titanium trifluoride

A hydrogen storage alloy and alloy technology, applied in the field of hydrogen storage materials, can solve problems such as poor hydrogen absorption and desorption kinetics of alloys, and achieve the effects of improving surface properties, increasing surface activity, and improving hydrogen absorption and desorption capacity and kinetics.
CN107099724BActive Publication Date: 2019-04-02INNER MONGOLIA UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
INNER MONGOLIA UNIV OF SCI & TECH
Publication Date
2019-04-02

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Abstract

The invention relates to a nano titanium trifluoride catalyzed Mg-RE-Ni-Al-Ti-Co based hydrogen storing alloy and a preparation method thereof. The hydrogen storing alloy has the following chemical composition: Mg18-x-yLaxREyNi2-z-mAlzTim+50(wt)%Co+n(wt)%TiF3, wherein x, y, z and m are atomic ratios; x is more than 1 and less than 3; y is more than 0.2 and less than 1; z is more than 0 and less than 1; m is more than 0 and less than 1; n is a mass percent of TiF3 accounting for Mg18-x-yLaxREyNi2-z-mAlzTim; n is more than 3 and less than 8; and RE comprises at least one of rare earth elements such as Ce, Nd, Y, Sm and Gd. The hydrogen storing alloy provided by the invention has high hydrogen storing capacity and excellent dynamics performance, and has high hydrogen absorption and desorption capacity at a low temperature. Moreover, the hydrogen absorption and desorption dynamics performance is greatly improved.
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Description

technical field

[0001] The invention relates to the technical field of hydrogen storage materials, in particular to a nano-TiF 3 Preparation method of catalyzed Mg-RE-Ni-Al-Ti-Co based hydrogen storage alloy. Background technique

[0002] Metal hydrides are considered to be ideal hydrogen fuel carriers for fuel cells due to their efficient and safe hydrogen storage properties, but the hydrogen storage capacity of currently commercialized hydrogen storage materials cannot meet the requirements of fuel cells. Magnesium-based alloys are recognized as the most potential hydrogen storage materials due to their high hydrogen storage density and extremely rich resources. where Mg 17 La 2 The hydrogen storage capacity of the type alloy is about 6wt%, which fully meets the capacity requirement of the fuel cell in terms of its hydrogen storage capacity. However, the crystalline Mg 17 La 2 The alloy has almost no ability to desorb hydrogen at room temperature, and the hydrogen ab...

Claims

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