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Method for preparing magnesium composite carbon nanometer tube hydrogen-storage material

A technology of hydrogen storage materials and carbon nanotubes, which is applied in the field of hydrogen storage energy materials, can solve problems such as easily damaged carbon nanotube structures, and achieve the effects of large hydrogen storage capacity, stable performance, and fast hydrogen absorption and desorption

Inactive Publication Date: 2007-12-26
SHANGHAI UNIV
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Problems solved by technology

The preparation method of magnesium-based composite hydrogen storage materials formed by magnesium and non-metallic C or Si has attracted people's attention. For example, the compound obtained by mixed ball milling of multi-walled carbon nanotubes and magnesium has good hydrogen absorption and desorption properties, but ball milling is easy. destroy the structure of carbon nanotubes

Method used

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  • Method for preparing magnesium composite carbon nanometer tube hydrogen-storage material
  • Method for preparing magnesium composite carbon nanometer tube hydrogen-storage material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Under the protection of an inert gas, common magnesium powder, carbon nanotubes and anthracene (carbon nanotubes can be single-walled carbon nanotubes or multi-walled carbon nanotubes) by the mass of magnesium: carbon nanotubes: anthracene=1:0.05:8 Put it in a reaction vessel, add an appropriate amount of tetrahydrofuran (THF) that has been treated with anhydrous and anaerobic treatment, the reaction temperature is 20° C., and electromagnetic stirring is performed for 1 hour. Afterwards, distillation at atmospheric pressure yielded a thick product. The thick material is subjected to vacuum thermal decomposition at 100° C. for 1 hour, and the anthracene is sublimated and then separated. The obtained solid powder material is the magnesium composite carbon nanotube hydrogen storage material, and finally the obtained material is vacuum-sealed and packaged. The magnesium composite carbon nanotube hydrogen storage material was subjected to X-ray diffraction, scanning electron...

Embodiment 2

[0024] Under the protection of an inert gas, common magnesium powder, carbon nanotubes and anthracene (carbon nanotubes can be single-walled carbon nanotubes or multi-walled carbon nanotubes) by the mass of magnesium: carbon nanotubes: anthracene=1:0.1:7 Put it in a reaction vessel, add an appropriate amount of tetrahydrofuran (THF) treated with anhydrous and oxygen-free, and stir it electromagnetically for 2 hours at a reaction temperature of 60° C. under the protection of an inert gas. Afterwards, distillation at atmospheric pressure yielded a thick product. The thick material is thermally decomposed under the protection of an inert gas at 160°C for 4 hours, and the separated solid powder material obtained after sublimation of anthracene is the magnesium composite carbon nanotube hydrogen storage material, and finally the obtained material is vacuum-sealed and packaged. PCT results show that the hydrogen storage capacity of the magnesium composite carbon nanotube hydrogen st...

Embodiment 3

[0026] Under argon protection, magnesium powder, carbon nanotubes and anthracene (carbon nanotubes can be single-walled carbon nanotubes or multi-walled carbon nanotubes) in the mass ratio of magnesium: carbon nanotubes: anthracene=1:0.4:9 , placed in a reaction vessel, added an appropriate amount of anhydrous and oxygen-free tetrahydrofuran (THF), the reaction temperature was 40 ° C, under the protection of argon, and electromagnetically stirred for 5 hours. Afterwards, distillation at atmospheric pressure yielded a thick product. The thick product was subjected to vacuum thermal decomposition at 150°C for 2 hours to separate the sublimed anthracene, and finally the obtained solid powder material was vacuum-sealed and packaged. PCT results show that the hydrogen storage capacity of the magnesium composite carbon nanotube hydrogen storage material is 7.5wt%H at 300°C and 2MPa hydrogen, and the hydrogen absorption capacity reaches 4.4wt%H at 100°C. The hydrogen absorption temp...

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Abstract

A process for preparing the Mg compounded carbon nano-tube material as hydrogen-bearing material includes such steps as loading Mg powder, carbon nano-tube and anthracene into reactor under protection of inertial gas, adding tetrahydrofuran, reaction while electromagnetic stirring, ordinary-pressure distilling and thermal decomposing. It has high activity and high hydrogen absorbing and releasing performance.

Description

technical field [0001] The invention relates to a preparation method of a magnesium composite carbon nanotube hydrogen storage material. The invention belongs to the technical field of hydrogen storage energy materials. Background technique [0002] Hydrogen is a clean energy with high energy density and high efficiency, and it is one of the most attractive forms of energy. Using hydrogen storage materials to store and transport hydrogen, the structure is compact, safe and reliable, not only has no danger of explosion, but also can provide high-purity hydrogen. Because magnesium-based hydrogen storage materials have large hydrogen storage capacity, light weight, abundant resources, and low price, they have great advantages in large-scale storage and transportation of hydrogen, so they are considered to be the most promising hydrogen for fuel cells, hydrogen-burning vehicles, etc. one of the sources. [0003] Different preparation methods will cause great differences in th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/20B01J20/22C01B31/02
Inventor 林根文李谦周国治鲁雄刚张捷宇
Owner SHANGHAI UNIV
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