CN102181682B - Preparation method of high-capacity porous metal alloy block serving as hydrogen storage material - Google Patents
Preparation method of high-capacity porous metal alloy block serving as hydrogen storage material Download PDFInfo
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- CN102181682B CN102181682B CN 201110092852 CN201110092852A CN102181682B CN 102181682 B CN102181682 B CN 102181682B CN 201110092852 CN201110092852 CN 201110092852 CN 201110092852 A CN201110092852 A CN 201110092852A CN 102181682 B CN102181682 B CN 102181682B
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- hydrogen storage
- porous metal
- metal alloy
- storage material
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Abstract
The invention discloses a preparation method of a porous metal alloy block serving as a hydrogen storage material. The method comprises the following steps of: mixing alloy and a pore forming agent uniformly in a certain ratio, pressing the mixture into a block, performing superheating treatment on the block or soaking the block into a potassium hydroxide solution, and removing the pore forming agent to obtain the porous metal alloy hydrogen storage material. In the invention, easily decomposed substances and easily dissolved substances are used as the pore forming agent, so that the total hydrogen storage capacity of the prepared porous metal block alloy is 1.7 to 2.0 weight percent at the temperature of less than 100 DEG C.
Description
Technical field
The present invention relates to a kind of preparation method of heavy body porous metal alloy block hydrogen storage material, belong to the hydrogen storage material preparing technical field.
Background technology
Metal alloy storage hydrogen is compared with carbonaceous material, metallic organic framework hydrogen storage materials such as (MOF), and its hydrogen storage capability is relatively low, aspect hydrogen storage material, is being in a disadvantageous position; It is moderate that but metal alloy has the temperature, suction of reversible reaction/put the hydrogen platform, advantages such as good cycling stability, and used among the production as the negative material of hydrogen storage material and Ni-MH battery.Therefore, in order to improve the competitive capacity of alloy, it is very necessary to improve the total suction of alloy/put hydrogen capacity.In the prior art disclosed raising metal alloy inhale/put the patent documentation of hydrogen capacity mainly be through alloy compositions optimization as (CN02111381.5, CN201010207982.3, CN 101629255 etc.), surface-treated (CN101728527, CN 101826619A, CN101078095 etc.), with the compound modes such as (CN101740767A, CN101457321, CN101307405) of other hydrogen storage materials.Hydrogen physisorption be through hole to the absorption of hydrogen to reach the purpose of Chu Qing.Because it can store a large amount of hydrogen, has very strong competitive edge.Yet, in disclosed document, the relevant report of finding to utilize hydride hydrogen-storing as yet and storing up hydrogen through the absorption in hole jointly.
Summary of the invention
The object of the present invention is to provide a kind of preparation method of heavy body porous metal alloy block hydrogen storage material, this method has improved total hydrogen storage capability, and the preparation process is simple.
The objective of the invention is to realize through following technical scheme.
A kind of preparation method of heavy body porous metal alloy block hydrogen storage material comprises following concrete steps:
(1) with alloy LaNi
5, La
0.8Mg
0.2Ni
3.8, Zr
0.9Ti
0.1(Mn
0.35Ni
0.50V
0.15)
2In any one and following pore-forming material: any one in urea, oxalic acid, carbon ammonium, sodium-chlor, the Lithium Hydroxide MonoHydrate is according to (1～5): 100 mass ratioes mix, are pressed into block;
(2) under vacuum condition, block is heat-treated under 100～400 ℃ temperature; Perhaps block is immersed in the potassium hydroxide solution, remove pore-forming material, can obtain porous metal alloy block hydrogen storage material finished product.
The beneficial effect that the present invention obtains is following: through the acting in conjunction of hydride hydrogen-storing and physics storage hydrogen, the capacity of the porous metal block hydrogen storage material for preparing among the present invention is (like LaNi
5The porous blocks material, 1.74%) apparently higher than the theoretical hydrogen storage capability (LaNi of corresponding hydrogen storage material
5, 1.5～1.6%), broken through the framework of conventional study metal alloy hydrogen storage material, the application of the research of novel hydrogen storage material and alloy is explored played a role.
Description of drawings
Fig. 1 is LaNi among the embodiment 1
5The sem photograph of porous alloy block.
Fig. 2 is LaNi among the embodiment 1
5The specific surface result of porous alloy block.
Fig. 3 is LaNi among the embodiment 1
5The suction hydrogen test result of porous alloy block.
Embodiment
Following specific embodiment is used to explain the present invention.
(1) with LaNi
5Alloy and oxalic acid are according to (1～5): 100 mass ratio mixes, is pressed into block;
(2) under vacuum condition, under 100 ℃ temperature, heat-treat, remove pore-forming material, obtain porous metal alloy block hydrogen storage material finished product;
(3) the porous metal alloy block material after will handling carries out field emission scanning electron microscope and characterizes and the specific surface analysis, and the result is as depicted in figs. 1 and 2.Can be known by figure: after bakingout process, the big hole/hole in aperture appears in the surface of alloy; Its corresponding specific surface area test result shows, at-196 ℃, can adsorb a large amount of nitrogen in the porous metal alloy block, also shows the hole/hole that has the adsorbed gas of a certain amount of ability in the material.The porous metal alloy block material is inhaled the hydrogen test at 70 ℃, and the hydrogen storage capability of being surveyed is 1.74wt%, than LaNi
5The high about 0.14wt% of hydrogen storage capability.
Embodiment 2
(1) with La
0.8Mg
0.2Ni
3.8Alloy and urea are according to (1～5): 100 mass ratio mixes, is pressed into block;
(2) under vacuum condition, under 400 ℃ temperature, heat-treat, remove pore-forming material, obtain porous metal alloy block hydrogen storage material finished product;
(3) the porous metal alloy block material is inhaled the hydrogen test at 70 ℃, and the hydrogen storage capability of being surveyed is 1.78wt%.
Embodiment 3
(1) with Zr
0.9Ti
0.1(Mn
0.35Ni
0.50V
0.15)
2With the carbon ammonium according to (1～5): 100 mass ratio mixes, is pressed into block;
(2) under vacuum condition, under 200 ℃ temperature, heat-treat, remove pore-forming material, obtain porous metal alloy block hydrogen storage material finished product;
(3) the porous metal alloy block material is inhaled the hydrogen test at 70 ℃, and the hydrogen storage capability of being surveyed is 2.0wt%.
Embodiment 4
(1) with La
0.8Mg
0.2Ni
3.8Alloy and sodium-chlor are according to (1～5): 100 mass ratio mixes, is pressed into block;
(2) block is immersed in the 6M potassium hydroxide solution, remove pore-forming material, obtain porous metal alloy block hydrogen storage material finished product;
(3) the porous metal alloy block material is inhaled the hydrogen test at 70 ℃, and the hydrogen storage capability of being surveyed is 1.73wt%.
Embodiment 5
(1) with La
0.8Mg
0.2Ni
3.8With Lithium Hydroxide MonoHydrate according to (1～5): 100 mass ratio mixes, is pressed into block;
(2) block is immersed in the 6M potassium hydroxide solution, remove pore-forming material, obtain porous metal alloy block hydrogen storage material finished product;
(3) the porous metal alloy block material is inhaled the hydrogen test at 70 ℃, and the hydrogen absorption capacity of being surveyed is 1.72wt%.
Embodiment 6
(1) with LaNi
5Alloy and carbon ammonium are according to (1～5): 100 mass ratio mixes, is pressed into block;
(2) with block under vacuum condition, under 100 ℃ temperature, heat-treat, remove pore-forming material, obtain porous metal alloy block hydrogen storage material finished product;
(3) the porous metal alloy block material is inhaled the hydrogen test at 70 ℃, and the hydrogen storage capability of being surveyed is 1.78wt%.
Claims (1)
1. the preparation method of a heavy body porous metal alloy block hydrogen storage material may further comprise the steps:
(1) with alloy LaNi
5, La
0.8Mg
0.2Ni
3.8, Zr
0.9Ti
0.1(Mn
0.35Ni
0.50V
0.15)
2In any one and following pore-forming material: any one in urea, oxalic acid, carbon ammonium, sodium-chlor, the Lithium Hydroxide MonoHydrate is (1～5) according to mass ratio: 100 mixed, be pressed into block;
(2) under vacuum condition, block is heat-treated 100～400 ℃ temperature; Perhaps block is immersed in the potassium hydroxide solution, remove pore-forming material, obtain porous metal alloy block hydrogen storage material finished product.
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| CN 201110092852 CN102181682B (en) | 2011-04-13 | 2011-04-13 | Preparation method of high-capacity porous metal alloy block serving as hydrogen storage material |
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| CN102181682B true CN102181682B (en) | 2012-12-19 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101353738A (en) * | 2008-09-26 | 2009-01-28 | 重庆大学 | Preparation of porosity controllable porous titanium |
| CN101740769A (en) * | 2009-12-01 | 2010-06-16 | 章应 | Novel hydrogen storage alloy |
| CN101752628A (en) * | 2010-01-21 | 2010-06-23 | 浙江大学 | Rechargeable metal hydride air cell |
| CN101752629A (en) * | 2010-01-21 | 2010-06-23 | 浙江大学 | Rechargeable metal hydride air battery with auxiliary electrode |
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2011
- 2011-04-13 CN CN 201110092852 patent/CN102181682B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101353738A (en) * | 2008-09-26 | 2009-01-28 | 重庆大学 | Preparation of porosity controllable porous titanium |
| CN101740769A (en) * | 2009-12-01 | 2010-06-16 | 章应 | Novel hydrogen storage alloy |
| CN101752628A (en) * | 2010-01-21 | 2010-06-23 | 浙江大学 | Rechargeable metal hydride air cell |
| CN101752629A (en) * | 2010-01-21 | 2010-06-23 | 浙江大学 | Rechargeable metal hydride air battery with auxiliary electrode |
Non-Patent Citations (1)
| Title |
|---|
| 吕建国等.AB5型贮氢合金及其优化设计.《金属功能材料》.2001,第8卷(第4期), * |
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