A kind of transition metal aluminum hydride and preparation method thereof

A technology of aluminum hydrides and transition metals, applied in the field of new transition metal aluminum hydrides and their preparation, can solve the problems of low reversible hydrogen storage capacity and difficulty in reaching the target, and achieve high hydrogen storage capacity, low cost, and easy operation Effect

Active Publication Date: 2022-07-15
NINGXIA UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to develop hydrogen storage materials that meet the requirements of the vehicle-mounted composite hydrogen storage system, researchers have carried out research on the modification of various hydrogen storage materials in recent years, mainly including TiCr 2 base and ZrFe 2 Base AB 2 Type hydrogen storage alloys and V-based BCC type hydrogen storage alloys, however, the reversible hydrogen storage capacity of these alloys under a specific hydrogen pressure is often low (< 2 wt%), and it is difficult to reach the hydrogen storage materials for vehicle-mounted composite hydrogen storage systems3~4 wt% target

Method used

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  • A kind of transition metal aluminum hydride and preparation method thereof
  • A kind of transition metal aluminum hydride and preparation method thereof
  • A kind of transition metal aluminum hydride and preparation method thereof

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Embodiment 1

[0031] In a glove box protected by an argon atmosphere, the YbCl 3 and LiAlH 4 After mixing according to the molar ratio of 1:3, it was put into the ball mill tank together with stainless steel balls, and the ball-to-material ratio was 40:1; the gas in the ball mill tank was pumped out with a vacuum pump and then filled with hydrogen. This process was repeated three times, and then filled with 5 MPa put the hydrogen-charged ball mill into the planetary ball mill, the program is to stop for 10 minutes after each 30 minutes of ball milling, and to obtain Yb (AlH) after 4 hours of ball milling. 4 ) 3 .

Embodiment 2

[0033] In a glove box protected by an argon atmosphere, the YbCl 3 and LiAlH 4 After mixing according to the molar ratio of 1:3, it was put into the ball mill tank together with stainless steel balls, and the ball-to-material ratio was 40:1; the gas in the ball mill tank was pumped out with a vacuum pump and then filled with hydrogen. This process was repeated three times, and then filled with 8 MPa put the hydrogen-charged ball mill into the planetary ball mill, the program is to stop for 10 minutes after each 30 minutes of ball milling, and to obtain Yb (AlH) after 4 hours of ball milling. 4 ) 3 .

Embodiment 3

[0035] In a glove box protected by an argon atmosphere, the YbCl 3 and LiAlH 4 After mixing according to the molar ratio of 1:3, it was put into the ball mill tank together with stainless steel balls, and the ball-to-material ratio was 40:1; the gas in the ball mill tank was pumped out with a vacuum pump and then filled with hydrogen. This process was repeated three times, and then filled with 10 MPa put the hydrogen-charged ball mill into the planetary ball mill, the program is to stop for 10 minutes after each 30 minutes of ball milling, and to obtain Yb (AlH) after 4 hours of ball milling. 4 ) 3 .

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Abstract

The invention discloses a novel transition metal aluminum hydride and a preparation method thereof, and belongs to the technical field of solid-state hydrogen storage materials. The transition metal aluminum hydride is aluminum ytterbium hydride, and the synthesis process is that ytterbium chloride and lithium aluminum hydride are mixed according to a certain molar ratio and then fully ball-milled in a hydrogen atmosphere. The transition metal aluminum hydride prepared by the invention has the advantages of high hydrogen storage capacity, low hydrogen release temperature, fast hydrogen release rate, simple preparation process and low cost, and is suitable for large-scale production.

Description

technical field [0001] The invention relates to the technical field of solid-state hydrogen storage materials, in particular to a novel transition metal aluminum hydride and a preparation method thereof. Background technique [0002] Hydrogen storage technology is a key link in the large-scale application of hydrogen energy. At present, hydrogen storage technologies mainly include three categories: high-pressure gaseous hydrogen storage, liquid hydrogen storage and solid hydrogen storage. The mass hydrogen storage density of high-pressure gaseous hydrogen storage is high, but the cost is high and the safety hazard is high, so it is not suitable for long-distance transportation; the mass and bulk density of low-temperature liquid hydrogen storage are very high, but the liquid hydrogen refrigeration process consumes a lot of energy, and the liquid Hydrogen is very volatile, which is not conducive to long-term use; solid-state hydrogen storage materials have high volumetric hy...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F17/30C01F17/10C01B3/00
CPCC01F17/30C01F17/10C01B3/001C01P2002/72C01P2002/88Y02E60/32
Inventor 曹志杰李丽江马晓波
Owner NINGXIA UNIVERSITY
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