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Nano-magnesium-based hydrogen storage material and preparation method thereof

A hydrogen storage material, nano-magnesium technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of unsatisfactory hydrogen absorption and desorption kinetics, high dehydrogenation temperature, etc., and achieve excellent Low-temperature hydrogen absorption kinetics and the effect of improving hydrogen storage performance

Active Publication Date: 2012-04-18
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although through unremitting efforts, the hydrogen absorption temperature of magnesium-based hydrogen storage alloys can be reduced to 373K, but the hydrogen absorption and desorption kinetics are still not ideal; in addition, the alloy needs to be dehydrogenated above 473K, and the dehydrogenation temperature is still high

Method used

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  • Nano-magnesium-based hydrogen storage material and preparation method thereof
  • Nano-magnesium-based hydrogen storage material and preparation method thereof
  • Nano-magnesium-based hydrogen storage material and preparation method thereof

Examples

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Effect test

Embodiment 1

[0029] Put carbon nanofiber powder into concentrated HNO 3 reflux at 140°C for 8 hours, wash with deionized water until neutral and dry after cooling to obtain functionalized carbon nanofiber powder. 0.3g functionalized carbon nanofiber powder and 6g Ni(NO 3 ) 2 ·6H 2 O (the content of nickel accounts for 80% of the total weight of carbon and nickel) is added in the ethanol reagent, dried after ultrasonic mixing; the powder after drying is calcined in the argon atmosphere of 450 ℃ for 3 hours, and then Reduction in a hydrogen atmosphere at 500° C. for 3 hours, and natural cooling to obtain carbon-supported nickel powder. Take 8.5g of magnesium powder and 1.5g of carbon-supported nickel powder and place them in acetone reagent, ultrasonically mix and then dry to obtain magnesium / carbon-supported nickel powder. The magnesium / carbon-supported nickel powder is subjected to hydrogenation combustion synthesis. During the hydrogenation-combustion synthesis process, the magnesium / ...

Embodiment 2

[0032] Putting MWCNT powder into concentrated HNO 3 reflux at 140° C. for 6 hours, wash with deionized water until neutral and dry after cooling to obtain functionalized multi-walled carbon nanotube powder. 0.6g functionalized multi-walled carbon nanotube powder and 4.5g Ni(NO 3 ) 2 ·6H 2 O (the content of nickel accounts for 60% of the total weight of carbon and nickel) is added to the ethanol reagent, dried after ultrasonic mixing; the dried powder is calcined in an argon atmosphere at 400 ° C for 4 hours, and then Reduction in a hydrogen atmosphere at 450° C. for 4 hours, and natural cooling to obtain carbon-supported nickel powder. 8.5g of magnesium powder and 1.5g of carbon-supported nickel powder were placed in acetone reagent, ultrasonically mixed and then dried to obtain magnesium / carbon-supported nickel powder. The magnesium / carbon-supported nickel powder is subjected to hydrogenation combustion synthesis. During the hydrogenation-combustion synthesis process, the...

Embodiment 3

[0035] Putting MWCNT powder into concentrated HNO 3 reflux at 140°C for 7 hours, wash with deionized water until neutral and dry after cooling to obtain functionalized multi-walled carbon nanotube powder. 0.78g functionalized multi-walled carbon nanotube powder and 2.6g Ni(NO 3 ) 2 ·6H 2 O (the content of nickel accounts for 40% of the total weight of carbon and nickel) is added in the ethanol reagent, dried after ultrasonic mixing; the powder after drying is calcined in the argon atmosphere of 380 ℃ for 5 hours, then in Reduction in a hydrogen atmosphere at 470° C. for 5 hours, and natural cooling to obtain carbon-supported nickel powder. 8.7g of magnesium powder and 1.3g of carbon-supported nickel powder were placed in acetone reagent, ultrasonically mixed and then dried to obtain magnesium / carbon-supported nickel powder. The magnesium / carbon-supported nickel powder is subjected to hydrogenation combustion synthesis. During the hydrogenation-combustion synthesis process,...

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Abstract

The invention discloses a nano-magnesium-based hydrogen storage material and a preparation method thereof. The preparation method comprises the following steps of: firstly, preparing by adopting a chemical method to obtain various nickel-carried carbon powder; uniformly mixing magnesium powder and the nickel-carried carbon powder by using ultrasound and drying to obtain magnesium / nickel-carried carbon powder; secondly, preparing a magnesium-based hydrogen storage material from the magnesium / nickel-carried carbon powder by adopting a hydriding combustion synthesis process; and ball milling theobtained magnesium-based hydrogen storage material under the protection of hydrogen gas or argon gas atmosphere to finally obtain the nano-magnesium-based hydrogen storage material. The hydrogen absorption amount of the prepared nano-magnesium-based hydrogen storage material at the temperature of 373K within 100s reaches 5.62 percent by weight; and the initial dehydration temperature of samples is reduced below 400K. The nano-magnesium-based hydrogen storage material has excellent low-temperature hydrogen storage performance; and according to the nano-magnesium-based hydrogen storage material, the hydrogen absorption performance at low temperature is improved, the initial dehydration temperature is effectively reduced and the practical development of the magnesium-based hydrogen storage material is promoted.

Description

technical field [0001] The invention relates to a nano-magnesium-based hydrogen storage material and a preparation method thereof, in particular to a nano-magnesium-based hydrogen storage material with better low-temperature reversible hydrogen storage performance and a preparation method thereof. Background technique [0002] At present, pollutants such as carbon dioxide, carbon monoxide, sulfur dioxide, and nitrogen oxides emitted by industrial energy are deteriorating the environment, and traditional energy sources such as coal and oil are also increasingly depleted. People urgently need to research and develop new sustainable clean energy. Hydrogen energy is an ideal secondary energy source for human beings in the future. Its development and application are of great significance to solving energy crisis and environmental pollution. As an important link in the application of hydrogen energy, hydrogen storage technology has received extensive attention in recent years. ...

Claims

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Application Information

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IPC IPC(8): C22C23/00C22C1/05B82Y40/00B82Y30/00
Inventor 朱云峰杨阳李李泉卫灵君
Owner NANJING UNIV OF TECH
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