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Novel organic coated core-shell nano composite hydrogen storage material and preparation method thereof

A technology of nanocomposite and hydrogen storage materials, which is applied in the field of new organic-coated core-shell nanocomposite hydrogen storage materials and their preparation, to avoid excessive pulverization, improve activation characteristics, and suppress poisoning

Active Publication Date: 2018-06-22
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 novel organic-coated core-shell nanocomposite hydrogen storage material and its preparation method, which can effectively Isolate active gas molecules, improve material activation characteristics, organic film elastic coating, can effectively prevent problems such as difficulty in mass transfer and heat transfer caused by excessive pulverization of alloy particles, significantly improve activation and cycle characteristics of magnesium-rich alloys, and consolidate tissue regulation and surface Good modification effect after catalysis

Method used

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  • Novel organic coated core-shell nano composite hydrogen storage material and preparation method thereof
  • Novel organic coated core-shell nano composite hydrogen storage material and preparation method thereof
  • Novel organic coated core-shell nano composite hydrogen storage material and preparation method thereof

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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 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 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 nic...

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-xLa 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

The invention discloses a novel organic coated core-shell nano composite hydrogen storage material and a preparation method thereof. The preparation method comprises the steps that magnesium blocks, nickel powder and lanthanum powder are selected and proportioned, the weighed magnesium blocks are heated to 750-800 DEG C under the protection of the SF6-CO2 mixed atmosphere, pre-pressed nickel-lanthanum sheets are put into molten magnesium, an alloy melt is continuously heated, heat preservation is carried out, casting in a steel mold preheated to 200 DEG C in advance is carried out after all the nickel-lanthanum sheets are molten, air cooling is carried out to reach the room temperature, obtained magnesium-rich alloy ingots are placed in an argon-shielding closed ball milling tank for grainrefinement, obtained nano / amorphous alloy powder, CNTs and TiF3 are added into a ball milling tank, high-energy ball milling is carried out under the protection of high-purity argon so as to obtain nano composite hydrogen storage alloy powder, and PMMA ultrasonic is added so as to obtain the three-layer core-shell type nano composite hydrogen storage material. According to the novel organic coated core-shell nano composite hydrogen storage material and the preparation method thereof, the activation and circulation characteristics of an magnesium-rich alloy are obviously improved, and the goodmodification effects after tissue regulation and control and surface catalysis are consolidated.

Description

technical field [0001] The invention relates to the technical field of metal materials, in particular to a novel organic-coated core-shell nanocomposite hydrogen storage material and a preparation method thereof. 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 hydr...

Claims

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Application Information

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Patent Type & Authority Applications(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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