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Li3N hydrogen storage material doped with multiwalled carbon nanotubes to improve hydrogen storage performance and preparation method thereof

A technology of multi-walled carbon nanotubes and hydrogen storage materials, which is applied in the field of solid-state chemical hydrogen storage of light elements, can solve the problems that the performance of hydrogen storage materials cannot meet the specified and expected effects, and achieve improved hydrogen desorption performance, promotion of dispersion, Effect of improving hydrogen absorption and desorption kinetics and cycle stability

Inactive Publication Date: 2017-10-17
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the performance of existing hydrogen storage materials cannot meet the specified and expected effects.

Method used

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  • Li3N hydrogen storage material doped with multiwalled carbon nanotubes to improve hydrogen storage performance and preparation method thereof
  • Li3N hydrogen storage material doped with multiwalled carbon nanotubes to improve hydrogen storage performance and preparation method thereof
  • Li3N hydrogen storage material doped with multiwalled carbon nanotubes to improve hydrogen storage performance and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1. Ball milling force 3 N pure sample: in an argon glove box, weigh pure Li 3 N sample 0.3g, put into a ball mill jar containing 30 stainless steel balls. The mass ratio of ball milling balls to powder is about 90:1. Then take out the ball mill jar from the glove box, fill it with 0.6MPa argon gas, and install the ball mill jar symmetrically in the planetary ball mill, and ball mill it for 2 hours at a speed of 450 rpm.

[0025] 2. Li after ball milling 3N pure sample morphology test: take a small part of Li in an argon glove box 3 N pure samples were quickly smeared on the SEM sample stage, sprayed for 15s, and placed in the electron microscope scanner, with a set size of 20μm and a magnification of 15.0kv. Then observe and shoot.

[0026] 3. The sample after ball milling was subjected to hydrogen desorption test: in an argon glove box, take 13 mg of Li after ball milling 3 N pure samples were tested for hydrogen desorption by thermal mass spectrometry, and the g...

Embodiment 2

[0029] 1. Ball milling of Li doped with 5mol% MWCNTs 3 N mixed samples to obtain Li doped MWCNTs 3 N mixed crystals:

[0030] Li doped with 5 mol% MWCNTs 3 N mixed samples: in an argon glove box, weigh pure Li 3 A total of 0.3 g of N sample and 5mol% MWCNTs were put into a ball mill jar containing 30 stainless steel balls. The mass ratio of ball milling balls to powder is about 90:1. Then take out the ball mill jar from the glove box, fill it with 0.6MPa argon gas, and install the ball mill jar symmetrically in the planetary ball mill, and ball mill it for 2 hours at a speed of 450 rpm.

[0031] 2. Li doped with 5mol% MWCNTs after ball milling 3 Morphology test of N mixed samples: a small portion of Li doped with 5 mol% MWCNTs was taken in an argon glove box 3 N mixed samples were quickly smeared on the SEM sample stage, sprayed for 15s, and placed in the electron microscope scanner, with a set size of 20μm and a magnification of 15.0kv. Then observe and shoot.

[0032...

Embodiment 3

[0035] 1. Ball milling of Li doped with 10 mol% MWCNTs 3 N mixed samples to obtain Li doped MWCNTs 3 N mixed crystals:

[0036] Li doped with 10 mol% MWCNTs 3 N mixed samples: in an argon glove box, weigh pure Li 3 A total of 0.3 g of N sample and 10mol% MWCNTs were loaded into a ball mill jar containing 30 stainless steel balls. The mass ratio of ball milling balls to powder is about 90:1. Then take out the ball mill jar from the glove box, fill it with 0.6MPa argon gas, and install the ball mill jar symmetrically in the planetary ball mill, and ball mill it for 2 hours at a speed of 450 rpm.

[0037] 2. Li doped with 10mol% MWCNTs after ball milling 3 Morphology test of N mixed samples: taking a small part of Li doped with 10 mol% MWCNTs in an argon glove box 3 N mixed samples were quickly smeared on the SEM sample stage, sprayed for 15s, and placed in the electron microscope scanner, with a set size of 20μm and a magnification of 15.0kv. Then observe and shoot.

[0...

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Abstract

The invention belongs to the technical field of light element solid-state chemistry hydrogen storage and relates to a Li3N hydrogen storage material doped with multiwalled carbon nanotubes to improve hydrogen storage performance and a preparation method thereof. The Li3N hydrogen storage system is doped with multiwalled carbon nanotubes (MWCNTs) through a ball milling effect to improve the hydrogen storage performance of a high-capacity hydrogen storage system (the Li3N hydrogen storage system). Compared with Li3N samples, the Li3N hydrogen storage material has the advantages that the hydrogen desorption initial temperature and the hydrogen desorption peak temperature of the Li3N hydrogen storage material are lowered, hydrogen desorption speed is increased, and circulating hydrogen absorption and desorption performance is improved evidently.

Description

technical field [0001] The invention belongs to the technical field of solid-state chemical hydrogen storage of light elements, in particular to Li 3 Exploration of highly efficient catalysts with improved hydrogen storage performance in N systems. Background technique [0002] Energy is the material basis for human survival. In today's society, due to the limited reserves of non-renewable energy-fossil energy itself, and the rapid economic growth and the huge consumption accompanied by population increase, it is especially important to find a clean and high-energy energy. . In recent years, hydrogen has been developed and researched as an efficient and clean energy, and it is known as one of the most ideal energy sources to replace fossil fuels. Because hydrogen only produces water after burning in the air, it becomes the most attractive zero-pollution energy source. The water produced by combustion can be decomposed to produce hydrogen, which can be recycled and regenera...

Claims

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Application Information

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IPC IPC(8): C01B3/00
CPCC01B3/0078C01P2002/80C01P2004/03Y02E60/32
Inventor 滕云雷张亚茹董宝霞
Owner YANGZHOU UNIV
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