CN105584989B - A kind of amorphous magnesium aluminum-base composite hydrogen storage material and preparation method thereof - Google Patents
A kind of amorphous magnesium aluminum-base composite hydrogen storage material and preparation method thereof Download PDFInfo
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- C01B3/00—Hydrogen; Gaseous mixtures containing hydrogen; Separation of hydrogen from mixtures containing it; Purification of hydrogen
- C01B3/0005—Reversible uptake of hydrogen by an appropriate medium, i.e. based on physical or chemical sorption phenomena or on reversible chemical reactions, e.g. for hydrogen storage purposes ; Reversible gettering of hydrogen; Reversible uptake of hydrogen by electrodes
- C01B3/001—Reversible uptake of hydrogen by an appropriate medium, i.e. based on physical or chemical sorption phenomena or on reversible chemical reactions, e.g. for hydrogen storage purposes ; Reversible gettering of hydrogen; Reversible uptake of hydrogen by electrodes characterised by the uptaking medium; Treatment thereof
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- C01B3/0005—Reversible uptake of hydrogen by an appropriate medium, i.e. based on physical or chemical sorption phenomena or on reversible chemical reactions, e.g. for hydrogen storage purposes ; Reversible gettering of hydrogen; Reversible uptake of hydrogen by electrodes
- C01B3/001—Reversible uptake of hydrogen by an appropriate medium, i.e. based on physical or chemical sorption phenomena or on reversible chemical reactions, e.g. for hydrogen storage purposes ; Reversible gettering of hydrogen; Reversible uptake of hydrogen by electrodes characterised by the uptaking medium; Treatment thereof
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Abstract
The invention discloses a kind of amorphous magnesium aluminum-base composite hydrogen storage material and preparation method thereof, by mass ratio 100:0.5~10 amorphous state Mg17Al12Matrix and transition metal hydride are made, and described transition metal hydride is TiH2、ZrH2、ScH2One or both of more than.Preparation method includes：A) under inert atmosphere conditions, Mg powder and Al powder raw materials are pressed into Mg17Al12Proportioning uniformly mix, amorphous state Mg is prepared using low temperature ball grinding method17Al12Matrix powder；B) by prepared amorphous state Mg17Al12Matrix powder carries out mechanical ball mill with transition metal hydride powder under the protection of inert gas, and amorphous magnesium aluminum-base composite hydrogen storage material is obtained after ball milling.Composite hydrogen storage material prepared by the present invention has excellent middle low temperature hydrogen storage property.
Description
Technical field
The present invention relates to light hydrogen occluding Material Field, and in particular to a kind of amorphous magnesium aluminum-base composite hydrogen storage material and its preparation
Method.
Background technology
Hydrogen is a kind of energy carrier of clean and effective, and its combustion product is pollution-free, have combustibility is good, it is fast to light,
The advantages that calorific value is also high, it, which is developed, can both solve the increasingly short energy crisis of fossil energy, can eliminate fossil fuel again
A series of problem of environmental pollutions such as greenhouse effects, haze caused by burning.Using hydride hydrogen-storing be a kind of safety and
The approach of hydrogen density is stored up with very Fabrication of High Specific Capacitance, have the function that in secondary energy sources field it is irreplaceable, particularly in fuel
In battery, Ni-MH battery material, there is very important status.Metal Mg is due to relatively high quality hydrogen-storage density
(7.6wt.%) and cheap price and be considered to have the metal hydrogen storage material of good development prospect.But hydrogen is put in its actual suction
Operation temperature it is too high (>400 DEG C), kinetics poor-performing, seriously constrain practical application.At present to magnesium-base hydrogen storage material
Its hydrogen storage property can be effectively improved using compound effect, mainly included：Mg+Mg2Ni, Mg+LaNi5, Mg+FeTi etc., but on
The hydrogen discharging temperature for stating compound system is still too high.In addition, Mg17Al12- H theoretical hydrogen storage content is 4.4wt.%, compares Mg2NiH4's
Hydrogen storage content height (3.6wt.%), and Mg17Al12The hydrogen decomposition temperature of putting of-H systems compares MgH2And Mg2NiH4It is low《Hydriding
behavior of Mg–Al and leached Mg–Al compounds prepared by high-energy ball-
milling,J.Alloys Comp.,2000,297:282-293》.Further study show that amorphous state Mg17Al12The suction of alloy
Hydrogen discharging performance is substantially better than nanocrystalline and as cast condition Mg17Al12Alloy《Milled Mg17Al12The micro-structural of nanocrystalline/non-crystaline amorphous metal and
Hydrogen storage property, XI AN JIAOTONG UNIVERSITY Subject Index, 2007；41(11):1368-1352.》, but amorphous state Mg17Al12Alloy is in middle low temperature
Hydrogen desorption kineticses performance under the conditions of (≤200 DEG C) still can not meet the demand of practical application.
Application publication number is the A of CN 104709873 (Application No. 201510109564.3) Chinese invention patent application
A kind of preparation method of new Mg-Li-Al-Ti hydrogen storage materials is disclosed, is comprised the following steps：(1) by LiH and LiAlH4By 1
~3：1 mol ratio is put into ball grinder, and mechanical mixture is carried out under the protection of inert gas, and Ball-milling Time is 5~10 hours, is turned
Speed is 150~300rpm, ratio of grinding media to material 200：1, Li is made3AlH6；(2) by MgH2With Li3AlH6Using mol ratio as (2~5)：1
Ratio be put into ball grinder, then by x%Al/AlCl3+ y%Ti/TiF3(5<x<20、5<y<15) mixture is put into ball grinder
In, ratio of grinding media to material is 100~300：1,1~6h of ball milling under the protection of inert gas, rotating speed are 50~300rpm, and Mg-Li- is made
Al-Ti hydrogen storage materials.This method passes through in-situ preparation catalyst Al3Ti, efficient catalytic MgH2Hydrogen storage material is carried out can inverse put hydrogen.
The technical scheme not only maintains MgH2High capacity hydrogen storage performance, and generated in-situ catalyst can be obviously improved MgH2Storage
The dynamic performance of hydrogen material, while significantly reduce its reversible hydrogen uptake condition.The composition of the Mg-Li-Al-Ti hydrogen storage materials
For：MgH2、Li3AlH6、Al/AlCl3And Ti/TiF3.But Mg-Li-Al-Ti hydrogen storage materials suction hydrogen discharging temperature is still higher,
And its quality hydrogen-storage density is also required to further improve.
The content of the invention
It is an object of the invention to provide a kind of amorphous magnesium aluminum-base composite hydrogen storage material, which solve magnesium-base hydrogen storage material and put
The problem of hydrogen temperature is too high, it is compared with can keep the preferable dynamic performance of system under low operating temperature.
A kind of amorphous magnesium aluminum-base composite hydrogen storage material, by mass ratio 100:0.5~10 amorphous state Mg17Al12Matrix and mistake
Cross metal hydride to be made, described transition metal hydride is TiH2、ZrH2、ScH2One or both of more than (including two
Kind).
Further preferably, described amorphous magnesium aluminum-base composite hydrogen storage material, by mass ratio 100:5~10 amorphous state
Mg17Al12Matrix and transition metal hydride are made, and have excellent middle low temperature hydrogen storage property.
Still more preferably, described amorphous magnesium aluminum-base composite hydrogen storage material, by mass ratio 100:5 amorphous state
Mg17Al12Matrix and transition metal hydride are made, and have more excellent middle low temperature hydrogen storage property.
Most preferably, described amorphous magnesium aluminum-base composite hydrogen storage material, by mass ratio 100:5 amorphous state Mg17Al12Base
Body and transition metal hydride are made, and described transition metal hydride is ScH2。
The composite hydrogen storage material has excellent middle low temperature hydrogen storage property.It can quickly be inhaled in 30min at 200 DEG C and put hydrogen
Reach 4.0wt.% capacity.
It is a further object to provide a kind of preparation method of amorphous magnesium aluminum-base composite hydrogen storage material, prepares letter
Just, it is easily obtained.
A kind of preparation method of amorphous magnesium aluminum-base composite hydrogen storage material, comprises the following steps：
A) under inert atmosphere conditions, Mg powder and Al powder raw materials are pressed into Mg17Al12Proportioning uniformly mix, prepared through ball milling
Obtain amorphous state Mg17Al12Matrix powder；
B) by prepared amorphous state Mg17Al12The protection of matrix powder and transition metal hydride powder in inert gas
Lower carry out mechanical ball mill, amorphous magnesium aluminum-base composite hydrogen storage material is obtained after ball milling.
In step a), the condition of described ball milling is：Ball milling temperature is less than 1 DEG C, and Ball-milling Time is not more than 50h.Further
It is preferred that the condition of described ball milling is：- 10 DEG C of ball milling temperature~1 DEG C, 10~50h of Ball-milling Time.Described inert atmosphere is argon
Gas.Still more preferably, the condition of described ball milling is：- 5 DEG C of ball milling temperature~1 DEG C, 30~50h of Ball-milling Time.
Described Mg powder and the particle diameter of Al powder are 50~200 μm, further preferably, the particle diameter of described Mg powder and Al powder
It is 74~154 μm.
In step b), the condition of mechanical ball mill is：2~30h of Ball-milling Time, ratio of grinding media to material are 20~40：1, rotational speed of ball-mill is
200~450rpm.Mechanical ball mill is carried out at ambient temperature, and at 10~35 DEG C, described inert gas is argon gas.Milling protection
The pressure of inert gas be 0.2~2.5MPa.
Above-mentioned prepared amorphous magnesium aluminum-base composite hydrogen storage material powder takes out under anaerobic anhydrous condition carries out related knot
Structure and performance test.
The composite hydrogen storage material has excellent middle low temperature hydrogen storage property.It can quickly be inhaled in 30min at 200 DEG C and put hydrogen
Reach 4.0wt.% capacity.
Compared with prior art, the beneficial effects of the present invention are：
(1) present invention amorphous magnesium aluminum-base composite hydrogen storage material powder craft phase prepared by (be less than 1 DEG C) under cryogenic
To simplicity.Medium (the cryosel utilized compared to the mechanical milling process in other cryogenic medias (such as liquid nitrogen, liquid argon), the present invention
Water) it is cheap and be easily obtained, it can effectively save the preparation cost of such amorphous magnesium aluminum-base composite hydrogen storage material.
(2) the brilliant magnalium base composite hydrogen storage material prepared by low temperature ball grinding method is utilized in the present invention compared to traditional room
Warm ball grinding method has significant advantage：This method can effectively be kept away while greatly particle/crystallite dimension of refinement hydrogen storage material
Exempt from due to the shortcomings that extreme low temperature condition causes the diffusivity of material to die down, so as to substantially increase the amorphous magnesium aluminum-base composite
Hydrogen storage material preparation efficiency.And prepared material has good activity function, circulation first can reach excellent suction and put
Hydrogen discharging performance under hydrogen characteristic, the particularly middle low temperature (≤200 DEG C) of the composite is substantially better than traditional Mg-base hydrogen-bearing material
Expect MgH2。
(3) TiH that the present invention is added2、ZrH2With ScH2Transition metal hydride fine catalyst is with nanocrystalline structure
Form Dispersed precipitate is in a-Mg17Al12Around non-crystaline amorphous metal, these catalyst can not only turn into the activated centre that hydrogen decomposes, simultaneously
H atom can be allowed to show quickly to be spread in the matrix of Mg-Al alloys as " hydrogen pump ", so as to effectively accelerate Mg hydrogen storage mistake
Journey.In addition, when the transition metal hydride powder of addition carries out ball milling preparation, the crystallite dimension of composite hydrogen storage material can be further
Attenuate, add the degree of disorder, while also produce more interfaces and defect, be more beneficial for reducing the activation needed for H atom diffusion
Can, and further improve the hydrogen storage property of composite.
(4) because raw material Al is than Ni more aboundresources and cheap, exploitation Mg-Al alloys are as hydrogen storage material phase
Than in Mg-Ni alloys by with bigger competitive advantage and application prospect.
Brief description of the drawings
Fig. 1 is the a-Mg prepared17Al12Amorphous alloy and a-Mg17Al12+ 10wt.%TiH2Amorphous magnesium aluminum-base composite stores up
The XRD spectrum of hydrogen material, (a) is prepared a-Mg in Fig. 117Al12The XRD curves of amorphous alloy, (b) is prepared in Fig. 1
a-Mg17Al12+ 10wt.%TiH2The XRD curves of amorphous magnesium aluminum-base composite hydrogen storage material, (c) is prepared a-Mg in Fig. 117Al12
The TEM pictures of amorphous alloy；
Fig. 2 is the a-Mg prepared17Al12+ 8wt.%TiH2The SEM patterns and each element of amorphous magnesium aluminum-base composite hydrogen storage material
EDS Surface scan spectral distribution figures, wherein, (d) is a-Mg in Fig. 217Al12+ 8wt.%TiH2Amorphous magnesium aluminum-base composite hydrogen storage material
The SEM patterns of material, (e) is the EDS Surface scan spectral distribution figures of Mg elements in Fig. 2, and (f) is the EDS Surface scans of Al elements in Fig. 2
Spectral distribution figure, (g) is the EDS Surface scan spectral distribution figures of Ti elements in Fig. 2；
Fig. 3 is amorphous a-Mg17Al12Alloy and prepared a-Mg17Al12+ x wt.%TiH2(x=5,10) composite hydrogen occluding
The suction hydrogen curve that material is depressed in 200 DEG C, 6.0MPa hydrogen；
Fig. 4 is the a-Mg prepared17Al12+ 5wt.%MH2(M=Ti, Zr, Sc) Mg-based composite hydrogen storage material 200 DEG C,
The Hydrogen desorption isotherms of 0.1MPa hydrogen pressure.
Embodiment
The percentage that following examples are related to, it is mass percent in case of no particular description.
Embodiment 1
According to Mg17Al12The composition proportion of alloy, raw material are 74~154 μm from Mg and Al powder diameters, and purity is equal
For 99%, under the conditions of inert atmosphere (argon gas), Mg powder and Al powder are first pressed into Mg17Al12Proportioning uniformly mixing be placed in utilizing
Brine ice carries out the double-deck ball grinder in the ball mill of temperature control, and ball milling 50h is to prepare amorphous state Mg at 0 DEG C17Al12Matrix
Dusty material.Then, it is TiH to select transition metal hydride2Powder, purity 99%, by prepared amorphous state Mg17Al12
Matrix powder is with accounting for the Mg17Al12Matrix total amount 10wt.% TiH2Powder mechanical ball mill 20h at 25 DEG C of room temperature, ball milling are protected
Shield atmosphere is the argon gas that purity is 99.99% respectively, and protective atmosphere pressure be 0.2MPa, and the ratio of grinding media to material in mechanical milling process is 40:
1, drum's speed of rotation 450rpm, finally prepare amorphous a-Mg17Al12+ 10wt.%TiH2Mg-based composite hydrogen storage material.
Fig. 1 is the a-Mg prepared17Al12Amorphous alloy and a-Mg17Al12+ 10wt.%TiH2Amorphous magnesium aluminum-base composite stores up
The XRD spectrum of hydrogen material.(a) can be seen that in Fig. 1, after the ball milling 50h at 0 DEG C, raw material Mg and Al crystalline substance contained by sample
State diffraction maximum is wholly absent, and its XRD spectrum is only left Mg17Al12Amorphous disperse peak, this shows the disordering degree of sample
Significantly improve, alloy is finally completely transformed into amorphous structure.The amorphous diffraction ring in TEM illustrations in Fig. 1 in (c) may be used also
Confirm prepared Mg17Al12For amorphous alloy.The XRD spectrum of (b) can be it has furthermore been found that by amorphous state from Fig. 1
Mg17Al12With TiH2After carrying out 20h ball-millings, amorphous state Mg in composite17Al12Still keep its non crystalline structure；And TiH2
The XRD diffraction maximums of widthization are then shown, according to TiH2It is about 40nm that the halfwidth of main peak, which can calculate its crystallite dimension,.Namely
Say, prepared a-Mg17Al12+ 10wt.%TiH2Mg-based composite hydrogen storage material is by a large amount of amorphous state Mg17Al12With receive on a small quantity
The TiH of rice crystalline state2Mixing composition.Heat analysis result is found, in above-mentioned Mg-based composite hydrogen storage material, due to nanocrystalline TiH2
Amorphous Mg is distributed in evenly17Al12Around matrix material so that prepared amorphous magnesium aluminum-base composite hydrogen storage material under cryogenic conditions
Material has preferable heat endurance, and it can keep good amorphous characteristic at 320 DEG C.
Embodiment 2
According to Mg17Al12The composition proportion of alloy, raw material are 74~154 μm from Mg and Al powder diameters, and purity is equal
For 99%, under inert atmosphere conditions, Mg powder and Al powder are first pressed into Mg17Al12Proportioning uniformly mixing be placed in utilizing brine ice
The double-deck ball grinder in the ball mill of temperature control is carried out, ball milling 50h is to prepare amorphous state Mg at -1 DEG C17Al12Matrix powder material
Material.Then, it is TiH to select transition metal hydride2Powder, purity 99%, by prepared amorphous state Mg17Al12Matrix powder
End is with accounting for the Mg17Al12Matrix total amount 8wt.% TiH2Powder mechanical ball mill 30h, other preparation process at 25 DEG C of room temperature
With embodiment 1, amorphous a-Mg is finally prepared17Al12+ 8wt.%TiH2Mg-based composite hydrogen storage material.
To analyze amorphous a-Mg17Al12With TiH2Combining case, EDS Surface scans are carried out to sample using ESEM
Energy spectrum analysis.Fig. 2 is the amorphous a-Mg prepared17Al12+ 8wt.%TiH2The SEM patterns and each element of Mg-based composite hydrogen storage material
EDS Surface scan spectral distribution figures.As seen from the figure, Mg and Al Elemental redistribution and particle SEM patterns pair in composite hydrogen storage material
Should be consistent, the matrix composition for showing material is Mg-Al alloys；Ti Elemental redistribution and particle SEM patterns are basically identical, show Ti
Element particle can be more evenly distributed on Mg-Al matrixes.
Embodiment 3
According to Mg17Al12The composition proportion of alloy, raw material are 74~154 μm from Mg and Al powder diameters, and purity is equal
For 99%, under inert atmosphere conditions, Mg powder and Al powder are first pressed into Mg17Al12Proportioning uniformly mixing be placed in utilizing brine ice
The double-deck ball grinder in the ball mill of temperature control is carried out, ball milling 35h is to prepare amorphous state Mg at -5 DEG C17Al12Matrix powder material
Material.Then, it is TiH to select transition metal hydride2Powder, purity 99%, by prepared amorphous state Mg17Al12Matrix powder
End is with accounting for the Mg17Al12Matrix total amount 10wt.% TiH2Powder mechanical ball mill 2h, milling protection atmosphere at 25 DEG C of room temperature
It is the hydrogen that purity is 99.99% respectively, protective atmosphere pressure be 2.5MPa, and the ratio of grinding media to material in mechanical milling process is 20:1, ball milling
Machine rotating speed is 200rpm, finally prepares amorphous a-Mg17Al12+ 10wt.%TiH2Mg-based composite hydrogen storage material.
Embodiment 4
Amorphous state Mg17Al12The preparation process of matrix powder material is the same as embodiment 3.Then, transition metal hydride is selected
For TiH2Powder, purity 99%, by prepared amorphous state Mg17Al12Matrix powder is with accounting for the Mg17Al12Matrix total amount
5wt.% TiH2Powder mechanical ball mill, its preparation process at 25 DEG C of room temperature finally prepare amorphous a- with embodiment 3
Mg17Al12+ 5wt.%TiH2Mg-based composite hydrogen storage material.
According to embodiment 3 and embodiment 4, further by the amorphous magnesium aluminum-base composite obtained by preparation under anaerobic anhydrous condition
Hydrogen storage material powder, which takes out, tests its hydrogen sucking function.Fig. 3 is amorphous a-Mg17Al12Alloy and prepared a-Mg17Al12+x
Wt.%TiH2(x=5,10) the suction hydrogen curve that composite hydrogen storage material is depressed in 200 DEG C, 6.0MPa hydrogen.As can be seen that amorphous a-
Mg17Al12Alloy is only 2.84wt.% in 200 DEG C of hydrogen-sucking amount；And add TiH2After composite modified, amorphous a-Mg17Al12+x
Wt.%TiH2The suction hydrogen speed and hydrogen-sucking amount of Mg-based composite hydrogen storage material are than single a-Mg17Al12Non-crystaline amorphous metal substantially carries
It is high.In amorphous a-Mg17Al12+ x wt.%TiH2In Mg-based composite hydrogen storage material, hydrogen-sucking amount during x=5 is 4.22wt.%, and x
It is 4.06wt.% when=10.Research also found, add TiH2Composite hydrogen storage material has good activity function afterwards, first
Its maximum hydrogen-sucking amount is can reach during secondary suction hydrogen.
Embodiment 5
Amorphous state Mg17Al12The preparation process of matrix powder material is the same as embodiment 3.Then, transition metal hydrogen is selected respectively
Compound is ZrH2And ScH2Powder, purity 99%, by prepared amorphous state Mg17Al12Matrix powder is with accounting for the Mg17Al12
Matrix total amount 5wt.% MH2(M=Zr, Sc) powder lower mechanical ball mill at 25 DEG C of room temperature, its preparation process with embodiment 4,
Finally prepare amorphous a-Mg17Al12+ 5wt.% MH2(M=Zr, Sc) Mg-based composite hydrogen storage material.
According to embodiment 4 and embodiment 5, further by the amorphous magnesium aluminum-base composite obtained by preparation under anaerobic anhydrous condition
Hydrogen storage material powder, which takes out, tests its hydrogen discharging performance.Fig. 4 is amorphous a-Mg17Al12Alloy and prepared a-Mg17Al12+
5wt.%MH2The Hydrogen desorption isotherms that (M=Ti, Zr, Sc) Mg-based composite hydrogen storage material is depressed in 200 DEG C, 0.1MPa hydrogen.Can by figure
See, add ZrH2And ScH2The hydrogen discharging performance of material and addition TiH after ball-milling2The hydrogen discharging performance of ball-milling material is suitable,
It can effectively improve the hydrogen desorption kineticses performance of amorphous magnesium aluminum-base composite hydrogen storage material, wherein a-Mg17Al12+ 5wt.%ScH2It is multiple
Compound hydrogen discharging performance is optimal, and the hydrogen desorption capacity at 200 DEG C in 30min is up to 4.00wt.%.Study and also found, prepared magnesium
Base composite hydrogen storage material can reach its maximum hydrogen desorption capacity putting hydrogen for the first time, have good activity function.
Claims (9)
1. a kind of amorphous magnesium aluminum-base composite hydrogen storage material, it is characterised in that by mass ratio 100:0.5~10 amorphous state Mg17Al12
Matrix and transition metal hydride are made, and described transition metal hydride is TiH2、ZrH2、ScH2One or both of with
On；
The preparation of described amorphous magnesium aluminum-base composite hydrogen storage material, comprises the following steps：
A) under inert atmosphere conditions, Mg powder and Al powder raw materials are pressed into Mg17Al12Proportioning uniformly mix, be prepared through ball milling
Amorphous state Mg17Al12Matrix powder；
B) by prepared amorphous state Mg17Al12Matrix powder is entered with transition metal hydride powder under the protection of inert gas
Row mechanical ball mill, amorphous magnesium aluminum-base composite hydrogen storage material is obtained after ball milling.
2. amorphous magnesium aluminum-base composite hydrogen storage material as claimed in claim 1, it is characterised in that by mass ratio 100:5~10
Amorphous state Mg17Al12Matrix and transition metal hydride are made.
A kind of 3. preparation method of amorphous magnesium aluminum-base composite hydrogen storage material as claimed in claim 1 or 2, it is characterised in that bag
Include following steps：
A) under inert atmosphere conditions, Mg powder and Al powder raw materials are pressed into Mg17Al12Proportioning uniformly mix, be prepared through ball milling
Amorphous state Mg17Al12Matrix powder；
The condition of described ball milling is：Ball milling temperature is less than 1 DEG C, and Ball-milling Time is not more than 50h；
B) by prepared amorphous state Mg17Al12Matrix powder is entered with transition metal hydride powder under the protection of inert gas
Row mechanical ball mill, amorphous magnesium aluminum-base composite hydrogen storage material is obtained after ball milling.
4. the preparation method of amorphous magnesium aluminum-base composite hydrogen storage material as claimed in claim 3, it is characterised in that in step a),
Described Mg powder and the particle diameter of Al powder are 50~200 μm.
5. the preparation method of amorphous magnesium aluminum-base composite hydrogen storage material as claimed in claim 3, it is characterised in that in step a),
The condition of described ball milling is：- 10 DEG C of ball milling temperature~1 DEG C, 10~50h of Ball-milling Time.
6. the preparation method of amorphous magnesium aluminum-base composite hydrogen storage material as claimed in claim 3, it is characterised in that in step a),
Described inert atmosphere is argon gas.
7. the preparation method of amorphous magnesium aluminum-base composite hydrogen storage material as claimed in claim 3, it is characterised in that in step b),
The condition of mechanical ball mill is：2~30h of Ball-milling Time, ratio of grinding media to material are 20~40：1, rotational speed of ball-mill is 200~450rpm.
8. the preparation method of amorphous magnesium aluminum-base composite hydrogen storage material as claimed in claim 3, it is characterised in that in step b),
Described inert gas is argon gas.
9. the preparation method of amorphous magnesium aluminum-base composite hydrogen storage material as claimed in claim 3, it is characterised in that in step b),
The pressure of inert gas is 0.2~2.5MPa.
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| CN110405219B (en) * | 2019-07-29 | 2021-01-12 | 四川大学 | Preparation method of high-power hydrogen storage alloy powder and high-power hydrogen storage alloy powder |
| CN111533086B (en) * | 2020-05-11 | 2023-12-01 | 中国科学院长春应用化学研究所 | Short-flow preparation method for rapidly activating hydrogen storage alloy by utilizing hydrogen-containing compound |
| CN114348958B (en) * | 2022-01-27 | 2023-07-07 | 徐州工程学院 | Amorphous trace lanthanum composite layered magnesium composite material and preparation method and application thereof |
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