Composite hydrogen storage material with foamed structure and preparation method thereof

A technology of hydrogen storage materials and composite materials, which is applied in the field of composite hydrogen storage materials with a foam structure and its preparation, can solve the problems of unsatisfactory hydrogen discharge capacity rate and capacity, poor hydrogen discharge kinetic performance, and high price, and achieve The effect of good reversible hydrogen storage and discharge performance

Inactive Publication Date: 2013-07-03
GENERAL RESEARCH INSTITUTE FOR NONFERROUS METALS BEIJNG
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, limited by the poor hydrogen desorption kinetics, NaAlH 4 The effective hydrogen desorption capacity rate and capacity are still unsatisfactory, such as its 160 ° C, 1 hour dehydrogenation is only 3.2wt% (T.Sun et al, J.Alloys Compds.467

Method used

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  • Composite hydrogen storage material with foamed structure and preparation method thereof
  • Composite hydrogen storage material with foamed structure and preparation method thereof
  • Composite hydrogen storage material with foamed structure and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0029] The specific composition of the N component of the composite material is: according to the ratio of titanium to manganese atomic ratio of 1:2, TiMn is prepared by induction melting 2alloy ingot.

[0030] A certain amount of the alloy is subjected to powder refinement through mechanical crushing, multiple hydrogen absorption and desorption cycles, and planetary ball milling. The ball milling time was 50 hours, the ball-to-material ratio was 30:1, and the rotation speed was 300 rpm. The average grain size of the finally obtained alloy is 60nm.

[0031] Finally, to NaAlH 4 Add 10wt.% of the alloy powder to the hydrogen storage material relative to the total amount of the composite hydrogen storage material, and mix it through a planetary ball mill. The process parameters are: ball milling time 3 hours, ball-material ratio 10:1, rotation speed 500rpm, and The tank is filled with hydrogen with a certain pressure (2 MPa) and a purity >99.99%. 90wt.%NaAlH 4 +10wt.%TiMn 2...

Embodiment 2

[0033] The specific composition of the composite material component N is: according to Ti 0.98 Zr 0.02 V 0.43 Fe 0.09 Cr 0.05 mn 1.43 Alloy general formula for proportioning. Preparation of Ti by induction melting 0.98 Zr 0.02 V 0.43 Fe 0.09 Cr 0.05 mn 1.43 (AB 2 alloy) alloy ingot. Ti 0.98 Zr 0.02 V 0.43 Fe 0.09 Cr 0.05 mn 1.43 The XRD diffraction pattern of the alloy is shown in 1-(d).

[0034] A certain amount of the alloy is subjected to powder refinement through mechanical crushing, multiple hydrogen absorption and desorption cycles, and high-energy ball milling. The ball milling time is 100 hours, the ball-to-material ratio is 15:1, the amplitude is 30 mm, and the rotation speed is 3000 rpm. An alloy powder with an average particle size of 80 nm was finally obtained.

[0035] NaAlH 4 40% by mass of the alloy powder relative to the total amount of the composite hydrogen storage material is added to the hydrogen storage material, and the mixture is mi...

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Abstract

The invention relates to composite hydrogen storage material with a foamed structure, which is formed by uniformly mixing and pressing Mwt% of NaAlH4 and Nwt% of Laves phase titanium system metal hydride. The general formula of the composite material is (100 percent-x)M+xN, wherein x is equal to 10wt% to 40wt%, and M is the weight percent of NaAlH4 powder. N is the weight percent of Laves titanium system hydrogen storage alloy powder prepared through at least two of titanium, zirconium, vanadium, ferrum and chromium elements. 200 to 700 MPa mechanical compression molding is performed under the protection of argon and nitrogen with purities not lower than 99.95 percent, the compression time is 10 to 22 minutes, and then a porous foamed space structure is formed. The composite hydrogen storage material with the foamed structure has good hydrogen storage and desorption performances, and can effectively discharge more than 3.7wt% of hydrogen within 50 minutes at 150 DEG C under 0.1 MPa hydrogen desorption pressure.

Description

technical field [0001] The invention relates to a composite hydrogen storage material with a foam structure and a preparation method thereof. The composite hydrogen storage material is composed of NaAlH with M weight fraction 4 The hydrogen storage material and the Laves phase metal hydride of the N weight fraction are mixed and pressed uniformly. The general formula of the composite material is (100%-x)M+xN, wherein the mass percentage of x is 30wt%-40wt%, and M is NaAlH 4 powder. N is a Laves phase titanium-based hydrogen storage alloy powder prepared from several elements of titanium, zirconium, vanadium, iron, chromium, manganese, cerium, and lanthanum. The composite hydrogen storage material with a foam-like spatial structure has good hydrogen storage and desorption performance, and can effectively desorb more than 3.7 wt% of hydrogen within 50 minutes at 150°C under a hydrogen desorption pressure of 0.1 MPa. Background technique [0002] Hydrogen is a clean fuel tha...

Claims

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Application Information

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IPC IPC(8): C01B3/02
Inventor 米菁刘晓鹏蒋利军郝雷杜淼李志念王树茂
Owner GENERAL RESEARCH INSTITUTE FOR NONFERROUS METALS BEIJNG
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