Magnesium-based modified casting alloy for solid hydrogen storage and preparation method of magnesium-based modified casting alloy

By adding Ni, Si and Na elements to the magnesium alloy, a variety of eutectic structures and porous catalytic layers are formed, which solves the problems of high dehydrogenation temperature and slow kinetics of magnesium alloy materials, and achieves efficient hydrogen storage performance.

CN119710401APending Publication Date: 2025-03-28SHANGHAI JIAOTONG UNIV
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Patent Information

Application Number
CN202411858839.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-16
Publication Date
2025-03-28

AI Technical Summary

Technical Problem

The dehydrogenation temperature of existing magnesium alloy materials is high and the desorption kinetics are slow, so it is impossible to achieve the effect of rapid hydrogen absorption and discharge.

Method used

By adding two transition metal elements Ni and Si to the magnesium alloy, a variety of eutectic structures are formed, the phase boundary of the magnesium alloy is increased, and the matrix Mg is wrapped by a variety of eutectic catalytic phases. At the same time, trace amounts of alkaline metal Na elements are added as eutectic modifiers to refine the eutectic structure and form a porous catalytic layer.

Benefits of technology

The dehydrogenation temperature of magnesium alloy is significantly reduced, the hydrogen absorption and discharge rate and cycle stability are improved, and the efficient hydrogen storage performance of magnesium alloy is achieved.

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Abstract

The invention discloses a magnesium-based modified casting alloy for solid hydrogen storage and a preparation method of the magnesium-based modified casting alloy, and relates to the field of hydrogen storage, in particular to an Mg-Ni-Tm quaternary modified casting alloy, in which Mg is the main element of the alloy and accounts for more than 80%, Ni is the main alloying element and accounts for 4-15 wt%, and Tm is composed of Si and Na and accounts for 0.6-1.3 wt% in the magnesium alloy. According to the invention, by further selecting the element types of the magnesium alloy and regulating and controlling the balance among the element proportions, the problems of high dehydrogenation temperature and slow desorption kinetics of the existing magnesium alloy material are solved, and the hydrogen storage performance of the magnesium alloy material is improved.
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