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Solid rare earth hydrogen storage alloy with low hysteresis and high pulverization resistance and its preparation and application

A hydrogen storage alloy, low hysteresis technology, applied in chemical instruments and methods, hydrogen, inorganic chemistry, etc., can solve the problems of increasing the hysteresis of hydrogen absorption and desorption of hydrogen storage alloys and receiving poisoning, shortening the service life of hydrogen storage alloys, etc. Achieve the effects of reducing structural differences, improving anti-powdering ability, and reducing hysteresis of hydrogen absorption and desorption

Active Publication Date: 2022-05-10
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the fine alloy powder has faster hydrogen absorption and desorption kinetics, it will also greatly increase the hydrogen absorption and desorption hysteresis of the hydrogen storage alloy and contact with impurity gases and be poisoned, thereby greatly shortening the service life of the hydrogen storage alloy

Method used

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  • Solid rare earth hydrogen storage alloy with low hysteresis and high pulverization resistance and its preparation and application
  • Solid rare earth hydrogen storage alloy with low hysteresis and high pulverization resistance and its preparation and application
  • Solid rare earth hydrogen storage alloy with low hysteresis and high pulverization resistance and its preparation and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Alloy chemical composition is La 0.3 Ce 0.5 Ca 0.2 Ni 4.5 co 0.5 , Calculate the addition amount of La, Ce, Ca, Ni, Co elemental raw materials according to the rare earth hydrogen storage alloy. Among them, the purity of the used La, Ce, Ca, and Ni raw materials are all above 99%. After the above raw materials are cleaned, they are weighed according to the calculated addition amount. Put the weighed metal raw materials in the water-cooled copper crucible of the magnetic levitation induction levitation melting furnace. After evacuating to a vacuum of 0.3 Ce 0.5 Ca 0.2 Ni 4.5 co 0.5 Rare earth hydrogen storage alloy.

Embodiment 2

[0048] Alloy chemical composition is La 0.3 Ce 0.5 Ca 0.2 Ni 4 For Co, the addition amount of La, Ce, Ca, Ni, and Co elemental raw materials was calculated according to the rare earth hydrogen storage alloy. Among them, the purity of the used La, Ce, Ca, and Ni raw materials are all above 99%. After the above raw materials are cleaned, they are weighed according to the calculated addition amount. Put the weighed metal raw materials in the water-cooled copper crucible of the magnetic levitation induction levitation melting furnace. After evacuating to a vacuum of 0.3 Ce 0.5 Ca 0.2 Ni 4 Co rare earth hydrogen storage alloy.

Embodiment 3

[0050] Alloy chemical composition is La 0.3 Ce 0.5 Ca 0.2 Ni 3.5 co 1.5 , Calculate the addition amount of La, Ce, Ca, Ni, Co elemental raw materials according to the rare earth hydrogen storage alloy. Among them, the purity of the used La, Ce, Ca, and Ni raw materials are all above 99%. After the above raw materials are cleaned, they are weighed according to the calculated addition amount. Put the weighed metal raw materials in the water-cooled copper crucible of the magnetic levitation induction levitation melting furnace. After evacuating to a vacuum of 0.3 Ce 0.5 Ca 0.2 Ni 3.5 co 1.5 Rare earth hydrogen storage alloy.

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Abstract

The invention discloses a solid rare earth hydrogen storage alloy with low hysteresis and high pulverization resistance, a preparation method thereof and an application in the field of high-density hydrogen storage. The general chemical formula of the solid rare earth hydrogen storage alloy with low hysteresis and high pulverization resistance is La x Ce y Ca z Ni 5‑w co w , where x, y, z, w all represent the atomic ratio and 0

Description

technical field [0001] The invention relates to the field of hydrogen storage materials, in particular to a high-safety solid-state rare earth hydrogen storage alloy with low hysteresis and high pulverization resistance and its preparation and application. Background technique [0002] With the emergence of resource and energy crises, the development of renewable energy has become the direction of history. Among many renewable energy sources, hydrogen is considered as an ideal renewable energy source due to its high energy density, abundant resources, and non-polluting energy conversion process, and it is also considered to be the ultimate way to achieve carbon neutrality. [0003] In terms of hydrogen energy utilization, hydrogen fuel cells have better energy utilization efficiency than traditional internal combustion engine combustion direct utilization, which is limited by the Carnot cycle. At the same time, the specific energy density of hydrogen fuel cells is 2 to 3 ti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C19/03C22C19/07C22C1/02C01B3/00
CPCC22C19/03C22C19/07C22C1/023C22C1/02C01B3/0057Y02E60/32
Inventor 肖学章周盼盼陈立新曹子鸣詹刘军朴明远
Owner ZHEJIANG UNIV
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