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Nano-catalysis complex nitride hydrogen storing material and method for preparing the same

A hydrogen storage material and nano-catalysis technology, which is applied in the field of safe and efficient hydrogen storage materials, can solve the problems of poor hydrogen absorption and desorption kinetic performance, and achieve the effect of improving the hydrogen absorption and desorption rate.

Active Publication Date: 2011-06-08
GRIMAT ENG INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a nano-catalytic composite nitride hydrogen storage material with high hydrogen storage capacity and rapid hydrogen absorption and desorption at a relatively low temperature, so as to solve the problem of poor hydrogen absorption and desorption kinetic performance of current nitride hydrogen storage materials

Method used

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  • Nano-catalysis complex nitride hydrogen storing material and method for preparing the same
  • Nano-catalysis complex nitride hydrogen storing material and method for preparing the same
  • Nano-catalysis complex nitride hydrogen storing material and method for preparing the same

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Put Ti powder, Mg powder and balls, which account for 6% of the weight of Mg powder, into a ball mill tank, the hydrogen pressure in the tank is 0.5MPa, the ball mill time is 10 hours, the ball-to-material ratio is 20:1, and the particle size of Ti powder and Mg powder is 10μm, after vacuuming (vacuum degree 1×10 -2 Pa) Charge hydrogen to carry out reaction ball milling, check the pressure change in the tank at an interval of 2 hours, and supplement hydrogen to maintain the hydrogen pressure in the tank.

[0028] Alloyed Mg powder and LiNH 2 The molar ratio is 10:1, the ball milling time is 10 hours, and the ball-to-material ratio is 10:1. Alloyed Mg powder, LiNH 2 The powder and the balls are put into the ball mill pot together, and after vacuuming (vacuum degree 1×10 -2 Pa) filled with argon protective gas for ball milling composite treatment, the argon gas pressure is 0.15MPa to protect the active metal in the tank, and finally a composite nitride hydrogen storage...

Embodiment 2

[0031] Put Cr powder, Mg powder and grinding balls accounting for 3% of the weight of Mg powder into the tank, the hydrogen pressure in the tank is 1.0MPa, the ball milling time is 20 hours, the ball-to-material ratio is 30:1, and the particle size of Cr powder and Mg powder is 10 μm , after vacuuming (vacuum degree 1×10 -2Pa) Charge hydrogen to carry out reaction ball milling, check the pressure change in the tank at an interval of 5 hours for ball milling, and supplement hydrogen to maintain the hydrogen pressure in the tank. Fig. 1(a) and Fig. 1(b) show the XRD pattern and microscopic morphology of the alloyed Mg powder.

[0032] Alloyed Mg powder and LiNH 2 The molar ratio is 15:1, the ball milling time is 15 hours, and the ball-to-material ratio is 20:1. Alloyed Mg powder, LiNH 2 The powder and the grinding balls are placed in the tank together, and after vacuuming (vacuum degree 1×10 -2 Pa) filling nitrogen protective gas for ball milling composite treatment, nitroge...

Embodiment 3

[0035] Put Ni powder, Mg powder and balls accounting for 0.5% of the weight of Mg powder into a ball mill tank, the hydrogen pressure in the tank is 2 MPa, the ball mill time is 30 hours, the ball-to-material ratio is 40:1, and the particle size of Ni powder and Mg powder is 10 μm , after vacuuming (vacuum degree 1×10-2Pa), fill with hydrogen for reaction ball milling, check the pressure change in the tank at intervals of 4 hours, and supplement hydrogen to maintain the hydrogen pressure of the tank.

[0036] Alloyed Mg powder and LiNH 2 The molar ratio is 5:1, the ball milling time is 20 hours, and the ball-to-material ratio is 30:1. Alloyed Mg powder, LiNH 2 The powder and the balls are put into the ball mill pot together, and after vacuuming (vacuum degree 1×10 -2 Pa) filled with ammonia protective gas for ball milling composite treatment, the ammonia gas pressure is 0.12MPa to protect the active metal in the tank, and finally a composite nitride hydrogen storage material...

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Abstract

The invention relates to a nanometer catalysis composite nitride hydrogen storage material and a preparation method thereof; the nanometer catalysis composite nitride hydrogen storage material is characterized in that a precursor is decomposed in a nitride substrate to precipitate nanometer catalysis phase with high activity, so as to realize quick reversible hydrogen absorption and desorption; more particularly, the nitride hydrogen storage material is the nitride composite material system of alloying magnesium powders and LiNH2 nanometer phase which has catalysis effect is uniformly arranged in the LiNH2 substrate; the alloying magnesium powders is a multiple catalysis material system which is formed by Mg powder and transition elements such as Cr, Mn, Ti, Fe, Cu, Ni and Y or other mixtures. The preparation method is characterized in that the nitride hydrogen storage material with high hydrogen absorption and desorption rate is gained by a two-step method: high-pressure hydrogen atmoesphere reaction ball-grinding alloying and inertia gas protection ball-grinding compounding. The composite nitride hydrogen storage material with high hydrogen absorption and desorption rate can be gained by the preparation method of the invention.

Description

technical field [0001] The invention relates to the field of safe and efficient hydrogen storage materials, in particular to a composite nitride hydrogen storage material synthesized through a reaction ball milling process and a preparation method thereof. technical background [0002] As a clean and efficient energy source, hydrogen energy occupies an important position in social production, and hydrogen storage materials have the characteristics of large hydrogen storage capacity, safety, convenience, and recyclable hydrogen absorption and desorption. Therefore, hydrogen storage materials are an important Energy materials have received extensive attention. ABs that have been applied so far 5 、AB 2 The hydrogen storage capacity of the hydrogen storage alloy is lower than 2.0mass.%, while the hydrogen storage temperature of the Mg-based hydrogen storage material with a high hydrogen storage capacity is above 300°C, and the hydrogen absorption and desorption rate is slow. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B3/02
Inventor 李法兵李华玲蒋利军刘晓鹏王树茂李志念李国斌
Owner GRIMAT ENG INST CO LTD
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