Catalyst enhanced MgAl-based hydrogen storage material

Abstract

The invention provides a catalyst enhanced MgAl-based hydrogen storage material, which is prepared by the following method: provide Mg and Al metal raw materials: weigh the Mg and Al metal raw materials according to a molar ratio of Mg: Al=(16-18): (11-13); perform the first vacuum melting on the Mg and Al metal raw materials; and crush the primary Mg alloy ingots to obtain the primary Mg alloy blocks; provide Ti, Zr and V metal raw materials weigh the primary Mg alloy blocks, and the Ti, Zr and V metal raw materials; perform ball milling treatment to obtain composite metal powder; press the composite metal powder into the loose alloy ingots; perform hot pressing treatment on the loose alloy ingots to obtain the dense alloy ingots, perform heat treatment on the dense alloy ingot; and wire cut the dense alloy ingots after heat treatment.

Description

TECHNICAL FIELD[0001]The present invention relates to the technical field of new energy materials, especially a catalyst enhanced MgAl-based hydrogen storage material.BACKGROUND TECHNOLOGY[0002]Metal hydride hydrogen storage materials achieve hydrogen absorption and desorption by a reversible reaction between hydrogen and a metal hydride. When the hydride is heated, it decomposes into the corresponding metal phase and releases hydrogen. Most of the metals used for hydrogen storage are alloys composed of various elements. Currently, the alloys successfully studied in the world can be roughly divided into: rare earth based series, Mg based series and so on. Compared with gaseous hydrogen storage and liquid hydrogen storage, metal hydride hydrogen storage has the advantages of large hydrogen storage mass density ratio, large hydrogen storage volume ratio, stable pressure, simple hydrogen charging, convenience, safety, etc., and at the same temperature and pressure, the density of hydro...

AI Technical Summary

Benefits of technology

The present invention is a new type of hydrogen storage material that solves the problems of rare earth element scarcity and Mg-based materials' poor hydrogen storage capacity and narrow temperature range. The material is designed with a catalyst that improves its recycling hydrogen storage effects and makes it suitable for high temperature conditions. The material is cheap and easy to obtain, and its manufacturing cost is low. The technical effects of this invention are stable and suitable for long-term service, and its application prospect is greatly expanded.

Problems solved by technology

Although it has many advantages, the problems are urgently needed to be solved, and the problems include improving the hydrogen storage capacity of hydrogen storage materials, reducing the cost of materials, saving precious metals in large-scale applications, and improving the thermodynamic and kinetic properties of materials in hydrogen absorption and desorption at relatively low temperature.

At present, most hydrogen storage alloys can not meet the performance requirements.

Mg has abundant storage in nature, low price and great application and development space, but its alloy hydride (MgH2) has great obstacles in both thermodynamics and kinetics.