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High performance and high capacity hydrogen storage alloy for fuel cell and preparation method thereof

A hydrogen storage alloy and fuel cell technology, applied in the field of magnesium-based hydrogen storage alloy and its preparation, can solve problems such as inability to meet vehicle requirements and the like

Active Publication Date: 2021-09-14
CENT IRON & STEEL RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In view of this, many technologies at home and abroad have been studied, including preparation technology, composition design, catalytic modification, surface modification, and compounding of various materials. Some results have been obtained, but they still cannot meet the vehicle requirements formulated by the US Department of Energy.

Method used

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  • High performance and high capacity hydrogen storage alloy for fuel cell and preparation method thereof
  • High performance and high capacity hydrogen storage alloy for fuel cell and preparation method thereof
  • High performance and high capacity hydrogen storage alloy for fuel cell and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Example 1: Mg 90 (Ce,Y) 3 (Ni,Co) 7 (x=10, a=3, b=7)

Embodiment 2

[0032] Example 2: Mg 90 (Ce,Y) 5 (Ni,Co) 5 (x=10, a=5, b=5)

Embodiment 3

[0033] Example 3: Mg 80 (Ce,Y) 10 (Ni,Co) 10 (x=0, a=10, b=10)

[0034] Example 1

[0035] Select bulk metal cerium, metal yttrium, and metal nickel and cobalt with purity ≥ 99.5%. These metals have the chemical formula (Ce,Y) 3 (Ni,Co) 7278.3 grams of metal cerium, 176.6 grams of metal yttrium, 272 grams of metal nickel, and 273.1 grams of metal cobalt were weighed respectively. Put the weighed metal in the magnesia crucible of the intermediate frequency induction furnace, evacuate to a vacuum degree below 0.05Pa, and then pass in 0.06MPa helium as a protective gas. Adjust the heating power and control the temperature at 1800°C. After all the metals are melted, pour the melt into the mold after electromagnetic stirring for 5 minutes, and cool to room temperature to obtain the cast Ce-RE-Ni-Co master alloy.

[0036] Take 743.4 grams of metal magnesium, and prepare 256.6 grams of the Ce-RE-Ni-Co master alloy, place it in the magnesium oxide crucible of the intermediate f...

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Abstract

The invention relates to a high-performance and high-capacity hydrogen storage alloy for fuel cells and a preparation method thereof. The chemical composition of the hydrogen storage alloy is represented by atomic ratio as Mg 80+x (Ce,Y) a (Ni,Co) b , where 0≤x≤15, 0≤a≤10, 5≤b≤20; and 5≤a+b≤20; the alloy has a double-platform synergy mechanism. The preparation method adopts a "3+1" metallurgical method, two-step smelting method, and one-step ball milling method, which effectively inhibits the volatilization of magnesium, ensures the uniformity of alloy components, and avoids the solid solution of Mg-Ni and Mg-Co compounds. A single compound of two magnesiums can be formed. After repeated hydrogenation, Mg with high plateau pressure is formed 2 Ni / Mg 2 NeH 4 Cyclic and low plateau Mg 6 co 2 h 11 / Mg 2 CoH 5 cycle. Dual platform induction Mg / MgH 2 Preferential nucleation improves kinetics and lowers reaction temperature. The hydrogen storage alloy of the invention has a hydrogen absorption capacity greater than 5wt.%, has fast hydrogen absorption and desorption kinetics, and is expected to become a solid hydrogen source for fuel cells.

Description

technical field [0001] The invention belongs to the field of magnesium-based hydrogen storage alloys and preparation techniques thereof, and in particular relates to a high-performance and high-capacity hydrogen storage alloy for fuel cells with a dual-platform synergy mechanism and a preparation method thereof. Background technique [0002] Hydrogen is a clean and efficient energy carrier, which can be produced not only from fossil resources, but also from various primary energy sources such as nuclear energy and renewable resources. This is not only conducive to the realization of my country's multi-energy optimization strategy, but also conducive to the realization of CO2 in the production of hydrogen fuel. 2 centralized processing. In addition, hydrogen energy can be efficiently converted into heat and electricity through fuel cells during use, while achieving near-zero emissions. It can be seen that hydrogen energy is an important bridge connecting fossil energy to re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/00C22C23/06C22C1/03B22F9/04C22F1/06C22F1/02H01M8/04082
CPCB22F9/04B22F2009/043C22C1/03C22C23/00C22C23/06C22C2202/04C22F1/02C22F1/06H01M8/04201H01M8/04216Y02E60/50
Inventor 雍辉郭世海安静祁焱张羊换赵栋梁
Owner CENT IRON & STEEL RES INST
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