Electrostrictive reversible hydrogen storage method

Abstract

The invention discloses an electrostrictive reversible hydrogen storage structure method. A hydrogen storage material adopted by the electrostrictive reversible hydrogen storage method has a multi-layer sandwich structure. A surface layer of the multi-layer sandwich structure is a catalyst film for decomposing a hydrogen molecule H2 into hydrogen atoms. A second layer of the multi-layer sandwich structure is a pure Mg film or an Mg-based multi-component low alloy film. A third layer of the multi-layer sandwich structure is an electrostrictive material film. The second layer and the third layer are arranged alternately in order along an inward direction. A direction and intensity variable electric field is applied above the multi-layer sandwich structure. Through the applied direction and intensity variable electric field, hydrogen storage and releasing of Mg and Mg alloys are controlled. Through electrostrictive effects produced by electrostrictive films under electric field effects, Mg and Mg alloy films produce stress sigma to change a lattice constant and even a crystal structure, reduce hydrogen storage and releasing temperatures of Mg and Mg alloys and accelerate a reaction speed. Control of the electrostrictive reversible hydrogen storage method is easy and a process of the electrostrictive reversible hydrogen storage method is reversible. The the electrostrictive reversible hydrogen storage method can greatly reduce hydrogen storage and releasing temperatures of a hydrogen battery, wherein the hydrogen storage and releasing temperatures are below 100 DEG C and even reach room temperature, reduce energy consumption and improve efficiency.

Description

1. Technical field [0001] The invention relates to the solid-state hydrogen storage technology in the field of new energy, in particular to the hydrogen storage of Mg and Mg alloy thin films. 2. Background technology [0002] Hydrogen is the most promising energy carrier for future green and clean energy systems. Compared with traditional fossil energy materials, hydrogen has significant advantages, such as high energy density (142MJ.kg -1 ), abundant sources (such as water, biomass, organic matter, etc. all contain hydrogen), light weight, and low environmental impact, etc. (since water is the only reaction product). However, developing compact hydrogen storage systems remains a scientific and technological challenge. Storing hydrogen in its molecular state, whether gas or liquid, requires very high pressures or extremely low temperatures, neither of which is energetically economical. At present, the research and development trend of hydrogen storage technology is to sto...

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Problems solved by technology

There are also some methods to change the thermodynamic properties of the Mg-H system, such as reducing the three-dimensional particle size, alloying, multi-element transition metal hydride, etc., but it is difficult to reduce the hydrogen release temperature below 100°C

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