mg-sn-ni ternary hydrogen storage master alloy for fuel cell, hydrogen storage material and preparation method

Abstract

The invention relates to a high-capacity Mg-Sn-Ni ternary hydrogen storage intermediate alloy used for a fuel cell, and a hydrogen storage material and preparation method of the high-capacity Mg-Sn-Ni ternary hydrogen storage intermediate alloy. According to the atomic percent, the alloy comprises the chemical component of Mg<100-a-b>SnNi, wherein a is within the range of 4-6, and b is within the range of 9-11. The preparation method comprises the steps that induction heating and smelting are adopted under inert gas protection, and molten alloy is poured into a copper casting mold to obtain a cylindrical alloy ingot; and the ingot is mechanically crushed into powder and screened, the screened alloy powder and 1-5wt% of catalyst graphite are together loaded into a stainless steel ball milling tank, after vacuum pumping, high-purity argon gas is injected, and ball milling is conducted for certain time in an all-dimensional planetary high-energy ball mill to obtain alloy powder of a nanocrystalline-non-crystalline structure. According to the high-capacity Mg-Sn-Ni ternary hydrogen storage intermediate alloy used for the fuel cell, and the hydrogen storage material and preparation method of the high-capacity Mg-Sn-Ni ternary hydrogen storage intermediate alloy, bond energy between Mg and H can be wakened through Sn and Ni, and the hydrogen storage performance of the magnesium-based hydrogen storage material is effectively improved; and through component design, microstructure adjustment and control and adding of the graphite, the heat stability of hydride of the alloy is reduced, and hydrogen absorption and desorption thermodynamics and kinetics performance of the alloy is improved.

Description

technical field

[0001] The invention belongs to the technical field of hydrogen storage alloy materials, and in particular provides a high-capacity Mg-Sn-Ni ternary hydrogen storage master alloy for fuel cells, a hydrogen storage material and a preparation method thereof. Background technique

[0002] With the advancement of science and technology and the development of society, human beings demand more and more energy, while traditional fossil fuel resources are not only increasingly depleted and non-renewable, but also cause great pollution and damage to the earth environment on which we live. Therefore, finding new renewable green energy is one of the problems faced by all mankind.

[0003] Hydrogen is a renewable green energy. Hydrogen has high energy density and combustion calorific value, is rich in resources, and its combustion product is water, which does not pollute the environment. Hydrogen can also be used in fuel cells. The storage and transportation of hydrog...

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