Preparation method of an organic-coated core-shell nanocomposite hydrogen storage material

A technology of nanocomposite and hydrogen storage materials, which is applied in the field of preparation of organic-coated core-shell nanocomposite hydrogen storage materials, to achieve the effects of suppressing poisoning, reducing the difficulty of activation, and improving the thermodynamic properties of hydrogen absorption and desorption

Active Publication Date: 2020-04-10
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to overcome the deficiencies of the above-mentioned prior art, the object of the present invention is to provide a method for preparing an organic-coated core-shell nanocomposite hydrogen storage material, which can effectively isolate the active Gas molecules can improve the activation characteristics of the material, and the elastic coating of the organic film can effectively prevent the problems of mass transfer and heat transfer caused by excessive pulverization of the alloy particles, significantly improve the activation and cycle characteristics of the magnesium-rich alloy, and consolidate the structure regulation and surface catalysis. good modification effect

Method used

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  • Preparation method of an organic-coated core-shell nanocomposite hydrogen storage material
  • Preparation method of an organic-coated core-shell nanocomposite hydrogen storage material

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Embodiment 1

[0025] The Mg-Ni-La based composite hydrogen storage alloy powder of the present invention is made of Mg-Ni-La alloy, CNTs and TiF 3 Catalyst composition, Mg-Ni alloy: CNTs: TiF 3 =8:1:1, the ratio is a weight ratio.

[0026] In the alloy belt, in the Mg-Ni-La alloy, the magnesium content is 90 at.%, the lanthanum content is 0-10 at.%, and the rest is nickel. The chemical formula of the alloy is Mg2Ni 1-x La x , 0≤x≤0.5, x=0 in this embodiment.

[0027] The invention also proposes a PMMA@CNT-TiF with excellent preparation, activation and cycle characteristics 3 @Mg-Ni-La three-layer core-shell nanocomposite hydrogen storage material, the specific process is:

[0028] Step 1, alloy ingredients: select metal magnesium block and nickel powder with purity ≥ 99.8%, press Mg 2 Ni 0.9 La 0.1 Stoichiometric ratio weighing, considering burning loss, magnesium added 3-5wt.% burning loss. In this embodiment, the addition amount of magnesium for burning loss is 3wt.%. The nickel ...

Embodiment 2

[0033] The Mg-Ni-La based composite hydrogen storage alloy powder of the present invention is made of Mg-Ni-La alloy, CNTs and TiF 3 Catalyst composition, Mg-Ni alloy: CNTs: TiF 3 =8:1:1, the ratio is a weight ratio.

[0034] In the alloy strip, in the Mg-Ni-La alloy, the magnesium content is 90 at.%, the lanthanum content is 0-10 at.%, and the rest is nickel. The chemical formula of the alloy is Mg 2 Ni 1-x La x, 0≤x≤0.5, x=0.1 in this embodiment.

[0035] The invention also proposes a PMMA@CNT-TiF with excellent preparation, activation and cycle characteristics 3 @Mg-Ni-La three-layer core-shell nanocomposite hydrogen storage material, the specific process is:

[0036] Step 1, alloy ingredients: select metal magnesium block and nickel powder with purity ≥ 99.8%, press Mg 2 Ni 0.9 La 0.1 Stoichiometric ratio weighing, considering burning loss, magnesium added 3-5wt.% burning loss. In this embodiment, the addition amount of magnesium for burning loss is 4wt.%. The n...

Embodiment 3

[0041] The Mg-Ni-La based composite hydrogen storage alloy powder of the present invention is made of Mg-Ni-La alloy, CNTs and TiF 3 Catalyst composition, Mg-Ni alloy: CNTs: TiF 3 =8:1:1, the ratio is a weight ratio.

[0042] In the alloy strip, in the Mg-Ni-La alloy, the magnesium content is 90 at.%, the lanthanum content is 0-10 at.%, and the rest is nickel. The chemical formula of the alloy is Mg 2 Ni 1-x La x , 0≤x≤0.5, x=0.3 in this embodiment.

[0043] The invention also proposes a PMMA@CNT-TiF with excellent preparation, activation and cycle characteristics 3 @Mg-Ni-La three-layer core-shell nanocomposite hydrogen storage material, the specific process is:

[0044] Step 1, alloy ingredients: select metal magnesium block and nickel powder with purity ≥ 99.8%, press Mg 2 Ni 0.7 La 0.3 Stoichiometric ratio weighing, considering burning loss, magnesium added 3-5wt.% burning loss. In this embodiment, the addition amount of magnesium for burning loss is 5wt.%. The ...

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Abstract

A method for preparing organic-coated core-shell nanocomposite hydrogen storage materials. The ratio of metal magnesium block to nickel powder and lanthanum powder is selected, and the weighed magnesium block is placed in the SF 6 +CO 2 Heating to 750-800°C under the protection of a mixed atmosphere, put the pre-pressed nickel-lanthanum flakes into the above-mentioned molten magnesium metal liquid, continue to heat up the alloy melt and keep it warm, after the nickel-lanthanum flakes are completely melted, cast until preheated to 200°C in advance In a steel mold, air-cooled to room temperature, the obtained magnesium-rich alloy ingot was placed in a closed ball mill tank protected by argon to refine the grains, and the obtained nano / amorphous alloy powder, CNTs and TiF3 were added to the ball mill tank , high-energy ball milling under the protection of high-purity argon to obtain base nanocomposite hydrogen storage alloy powder; adding PMMA ultrasonically to obtain a three-layer core-shell nanocomposite hydrogen storage material, the invention significantly improves the activation and cycle characteristics of magnesium-rich alloys, and consolidates the structure Good modification effect after regulation and surface catalysis.

Description

technical field [0001] The invention relates to the technical field of metal materials, in particular to a preparation method of an organic-coated core-shell nanocomposite hydrogen storage material. Background technique [0002] Energy is the basic need of daily life and the driving force behind human survival and social progress. Gradual population growth and rapid evolution of heavy industry lead to rising energy demand. Traditional fossil energy is non-renewable and overexploited, forcing the world into a dilemma of energy shortage and environmental pollution. It is imminent to develop and utilize clean and efficient renewable energy and sustainable energy and upgrade the current energy system. Hydrogen energy has significant advantages such as "zero emission, recyclability, high calorific value, and wide source", and hydrogen energy can be stored and transported, and it is expected to become a new energy that "drives" future life. Cheap and efficient hydrogen productio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/00C22C1/02B22F9/04B22F1/02H01M4/38
CPCH01M4/383C22C1/02C22C23/00B22F9/04B22F2009/043B22F1/102B22F1/16Y02E60/10
Inventor 侯小江杨艳玲冯雷锁国权王祎左玉李丹陈华军
Owner SHAANXI UNIV OF SCI & TECH
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