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

A mg-sn-ni, intermediate alloy technology, applied in the field of hydrogen storage alloy materials, can solve the problems of easy crushing, high price, and lattice deformation of alloys, and achieve improved formation ability, improved surface activity, and hydrogen absorption and desorption kinetics The effect of performance improvement

Active Publication Date: 2019-01-15
CENT IRON & STEEL RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the problem with rare earth-containing hydrogen storage materials is that the lattice deformation will occur after hydrogen absorption, the alloy is easily crushed, and the price is expensive

Method used

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

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preparation example Construction

[0033] The preparation method of the high-capacity Mg-Sn-Ni hydrogen storage material for the fuel cell of the present invention comprises the following steps:

[0034] a. Ingredients: Mg according to the chemical formula 85 sn5 Ni 10 Perform batching, wherein the magnesium in the chemical formula composition increases the burning loss by 5% to 10% during the ratio, and the purity of the raw materials is ≥ 99.5%;

[0035] b. Preparation of as-cast master alloy: put prepared raw materials into a magnesia crucible, add all materials except magnesium into the crucible in no particular order, and finally put magnesium on top. Melting by induction heating, vacuuming to 1×10 -2 ~5×10 -5 Pa, then fill in an inert protective gas with a pressure of 0.01-0.1MPa, that is, fill in high-purity helium or argon+helium mixed gas, and the volume ratio of the mixed gas is about 1:1; the melting temperature is 1300-1500°C, to ensure The metal raw material is completely melted. The melted al...

Embodiment 1

[0039] Example 1: Mg 85 sn 5 Ni 10 +3(wt.%)C (ball milling 10h)

Embodiment 2

[0040] Example 2: Mg 85 sn 5 Ni 10 +5(wt.%)C (ball milling 10h)

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/46
CPCB22F9/04B22F2009/043C22C1/02C22C23/00H01M4/9041Y02E60/50
Inventor 尹奕李波张羊换祁焱郭世海赵栋梁
Owner CENT IRON & STEEL RES INST
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