Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Preparation method of multi-light metal coordination aluminum hydride hydrogen storage material

An aluminum hydride, hydrogen storage material technology, applied in metal hydride, chemical instruments and methods, hydrogen production and other directions, to achieve the effects of simple raw materials, high production efficiency, and simple operation

Inactive Publication Date: 2009-10-28
ZHEJIANG UNIV
View PDF1 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the hydrogen absorption and desorption process of the synthesized material needs to undergo two-step reactions to completely absorb and desorb hydrogen.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of multi-light metal coordination aluminum hydride hydrogen storage material
  • Preparation method of multi-light metal coordination aluminum hydride hydrogen storage material
  • Preparation method of multi-light metal coordination aluminum hydride hydrogen storage material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Na according to the chemical formula x Li 3-x H 6 Coordination hydride hydrogen storage material, x=1.8 constitutes Na 1.8 Li 1.2 H 6 Coordinated hydrides. With NaH, LiH and Al powder as raw materials, elemental Ti powder as catalyst, calculate the weight ratio of LiH, NaH and Al powder according to NaH: LiH: Al=1.8: 1.2: 1 (molar ratio), then press (NaH+LiH +Al) is 4 mol.% of the total molar weight to calculate the doping amount of Ti powder. The purity of the above-mentioned NaH is ≥95%, and the particle size is 74 μm; the purity of LiH is ≥97%, and the particle size is 74 μm; the purity of Al powder is ≥99%, and the particle size is 74-154 μm; the purity of Ti powder is ≥99%, and the particle size is -3 bar, then filled with 3.5MPa hydrogen with a purity greater than 99.9%, and then ball milled at room temperature for 120h. Prepared Na 1.8 Li 1.2 H 6 The measured hydrogen discharge capacity at the first hydrogen discharge is 3.10wt.%.

[0021] The main chem...

Embodiment 2

[0025] Na according to the chemical formula x Li 3-x H 6 Coordination hydride hydrogen storage material, x=2, that is to form Na 2 LiAlH 6 Coordinated hydrides. Using NaH, LiH and Al powder as raw materials, TiF 3 As a catalyst, calculate the weight ratio of NaH, LiH and Al powder according to NaH:LiH:Al=2:1:1 (molar ratio), and then calculate TiF according to 2mol.% of the total molar weight of (NaH+LiH+Al) 3the amount of doping. The purity of the above-mentioned NaH is ≥95%, and the particle size is 74 μm; the purity of LiH is ≥97%, and the particle size is 74 μm; the purity of Al powder is ≥99%, and the particle size is 74-154 μm TiF 3 Powder purity ≥ 99%, particle size ≤ 154μm. The raw materials and the catalyst are put into the ball mill pot and the balls are added at a ball-to-material ratio of 30:1. Before ball milling, evacuate the ball mill tank to a vacuum degree of 10 -3 bar, then filled with hydrogen with a purity of ≥99.9%, 2.5MPa, and then ball milled at...

Embodiment 3

[0029] Na according to the chemical formula x Li 3-x H 6 Coordination hydride hydrogen storage material, x=2.4, that is to form Na 2.4 Li 0.6 H 6 Coordinated hydrides. Use NaH, LiH and Al powder as raw materials. Choose simple V powder as the catalyst. First calculate the weight ratio of NaH, LiH and Al powder according to NaH: LiH: Al=2.4: 0.6: 1 (molar ratio), and then calculate the doping ratio of V catalyst according to 4mol.% of the total molar weight of (NaH+LiH+Al). Impurities, the average particle size of V powder is about 50 μm, and the purity is >99%. Raw material parameters such as purity and particle size of NaH, LiH and Al are the same as in Example 1. Before ball milling, evacuate the ball mill tank to a vacuum degree of 10 -3 bar, then filled with 3.8MPa hydrogen with a purity greater than 99.99%, and then ball milled at room temperature for 130h to prepare Na 2.4 Li 0.6 H 6 The measured hydrogen storage capacity of the complex hydride is 3.03 wt.%. ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Particle sizeaaaaaaaaaa
Particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a preparation method of multi-light metal coordination aluminum hydride hydrogen storage material, NaxLi(3-x)AlH6, wherein x is more than or equal to 0 and less than 3. The method comprises the following steps of: mixing NaH, LiH and simple substance Al powder, adding a small amount of Ti, Zr, V, Sc or rear earth-based catalysts, and carrying out mechanic grinding for 60 to 140h at the atmosphere of hydrogen so as to synthetize NaxLi(3-x)AlH6 (x is more than or equal to 0 and less than 3) multi-light metal coordination aluminum hydride. The method has the advantages of being capable of synthetizing the final product of NaxLi(3-x)AlH6 (x is more than or equal to 0 and less than 3) directly at room temperature by ball grinding, and having simple operation, low energy consumption and safety and reliability; in addition, the synthetized material has high yield, and high reversible hydriding and dehydriding capacity at medium and low temperature, thus being a novel hydrogen storage material with infinite commercial value.

Description

technical field [0001] The invention belongs to the technical field of hydrogen storage materials, in particular to a preparation method for directly synthesizing multi-element light metal coordination aluminum hydride hydrogen storage materials by mechanical ball milling. Background technique [0002] Facing the dual pressures of increasing scarcity of oil resources and deterioration of the ecological environment, it has become a global consensus to use hydrogen energy, a clean energy source, to replace existing energy sources based on fossil fuels. The technological progress and marketization of hydrogen-fueled proton exchange membrane fuel cells and electric vehicles have further promoted the research and development of hydrogen energy system technology. In the hydrogen energy system technology chain, hydrogen storage technology is considered to be a key link. So far, liquid hydrogen, lightweight high-pressure containers and metal hydride systems in hydrogen storage techn...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C01B6/06C01B3/02
Inventor 陈立新范修林肖学章陈长聘
Owner ZHEJIANG UNIV
Features
  • Generate Ideas
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com