JP2003262300A - Hydrogen storage device and manufacturing method thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a fine powder of a hydrogen storage alloy from being mixed into a hydrogen gas. <P>SOLUTION: In a device to store the hydrogen gas by using the hydrogen storage alloy, the device has a base material 11 made of a material excellent in heat conductivity, a hydrogen storage alloy coating 12 formed on the surface of the base material 11, and moreover, a metal coating 13 formed with the thickness enough to transmit the hydrogen gas on the hydrogen storage alloy coating 12 and made of ductile copper, nickel aluminum or the like. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a hydrogen storage device for storing hydrogen used in a fuel cell or the like.

[0002]

2. Description of the Related Art Conventionally, when hydrogen is used as an energy source, it is necessary to store hydrogen as a gas by some means.

For this reason, a method of liquefying hydrogen and storing it as liquid hydrogen has been put into practical use as a method of storing hydrogen. However, in the case of storing a relatively small capacity, energy consumption for liquefying is large. Therefore, a hydrogen storage device using a hydrogen storage alloy is used.

FIG. 8 is a block diagram showing an example of a conventional hydrogen storage device, in which a powdery hydrogen storage alloy 3 is housed in a storage tank 4 together with a heat exchange tube 5. When storing hydrogen gas in the storage tank 4, by adjusting the valve 8 while observing the pressure gauge 7 from the hydrogen supply unit 6, a pressure of several atm to a dozen atm is applied and at the same time, from the inflow port 5A. Cooling water is caused to flow into the heat exchange tube 5 to cool the hydrogen storage alloy 3 in a powder state, and hydrogen gas is stored in the hydrogen storage alloy 3.

Next, in order to release the stored and stored hydrogen from the powdery hydrogen storage alloy 3, the heat exchange tube 5 is used.
By supplying hot water from the inlet 5A to heat the hydrogen storage alloy 3, hydrogen gas is released. The released hydrogen gas removes the fine powder contained in the hydrogen gas through the dust collection filter 9 and is sent out through the valve 10 as hydrogen gas containing no dust.

In this case, the cooling water and the hot water flowing into the heat exchange tube 5 from the inflow port 5A are discharged from the outflow port 5B.

[0007]

However, such a hydrogen storage device using the hydrogen storage alloy has such a structure that when hydrogen is repeatedly stored and released to store hydrogen at the grain boundaries of the hydrogen storage alloy, the particles of the hydrogen storage alloy are dispersed. The boundary also repeatedly expands and contracts, and as shown in FIG. 9, cracks 2 occur in the crystal grains 1 forming the hydrogen storage alloy, and the hydrogen storage alloy itself becomes fine powder from that portion. Get up.

Therefore, when the hydrogen storage alloy is used as a medium for storing hydrogen, the finely divided powder of the hydrogen storage alloy is mixed in the discharged hydrogen gas, and the hydrogen supply alloy is supplied to the gas supply pipe leading to the utilization device. There is a problem that the valve provided is clogged or the hydrogen utilization device is damaged. For example, when supplying hydrogen gas to a fuel cell as a hydrogen utilization device, when fine powder of a hydrogen storage alloy is supplied into the fuel cell together with the hydrogen gas, the electrodes stacked in the fuel cell are short-circuited, There was a risk of destroying.

In the conventional apparatus, the fine powder of the hydrogen storage alloy was removed by the dust collection filter 9, but it is difficult to remove the fine powder having a small particle size. When the fine powder progresses and the particle size becomes several microns or more, the dust collecting filter 9 is clogged,
It was difficult to completely remove the fine powder. Therefore, it is necessary to replace the storage alloy before the hydrogen storage alloy is pulverized, but it is uneconomical because the storage alloy is replaced before it is fully used, resulting in high cost.

When the hydrogen storage alloy is exposed to oxygen or carbon monoxide in the atmosphere, the surface is oxidized and the hydrogen storage / release function is significantly reduced.

Therefore, an object of the present invention is to completely prevent the fine powder of the hydrogen storage alloy from being mixed in the hydrogen gas at the time of releasing hydrogen from the hydrogen storage part, and the crystal surface of the hydrogen storage alloy film. Another object of the present invention is to provide a hydrogen storage device capable of constantly supplying clean hydrogen gas while preventing hydrogen from being oxidized.

[0012]

A hydrogen storage device of the present invention is a hydrogen gas storage tank in which pressurized hydrogen gas is stored, and hydrogen formed on the surface of a base material disposed in the hydrogen gas storage tank. A storage alloy coating, a fine powder release preventing coating that allows hydrogen gas to pass through the hydrogen storage alloy coating, and does not allow the fine powder of the hydrogen storage alloy to pass through, and temperature control means for selectively controlling the temperature of the base material. It is characterized by including.

Further, in the hydrogen storage device of the present invention,
The fine powder release preventing film is characterized by being formed of a metal film such as copper, nickel or aluminum, or a resin film.

Further, in the hydrogen storage device of the present invention, the laminate comprising the hydrogen storage alloy coating and the fine powder release preventing coating is laminated in a plurality of layers.

Further, in the hydrogen storage device of the present invention, the hydrogen storage alloy coating film is formed by low pressure plasma spraying.

Further, in the hydrogen storage device of the present invention, the fine powder release preventing coating is formed by electroless plating or low pressure plasma spraying.

Further, the hydrogen storage device of the present invention is provided with a hydrogen supply port and a hydrogen discharge port, a hydrogen gas storage tank for storing pressurized hydrogen gas therein, and a main body portion provided in the hydrogen gas storage tank. And a heat exchange tube having a heat exchange medium inlet and a heat exchange medium outlet outside the hydrogen gas storage tank, and a hydrogen storage alloy coating and a fine powder release prevention coating laminated on the surface of the main body of the heat exchange tube. And is provided.

Further, the hydrogen storage device of the present invention comprises a pair of plate-shaped base materials on the surface of which a laminated film composed of a hydrogen storage alloy coating and a fine powder release prevention coating is formed, and a pair of these plate-shaped base materials. The first and the second spacers are arranged so that the surfaces on which the laminated film is formed are opposed to each other with a space therebetween, and a pair of first spacers that form a hydrogen gas storage space for storing pressurized hydrogen gas together with the opposed surfaces. The second hydrogen gas storage unit and the back surfaces of the plate-shaped base materials forming the first and second hydrogen gas storage units are opposed to each other with a space therebetween, and the heat exchange medium is stored together with these opposed surfaces. It is characterized by comprising a pair of second spacers forming a heat exchange medium storage space.

Further, in the hydrogen storage device of the present invention, the hydrogen gas storage space has hydrogen supply ports and hydrogen discharge ports at both ends thereof, and the heat exchange medium storage space has heat exchange medium inlets and heat exchange medium inlets at both ends thereof. A heat exchange medium outlet is provided.

The method of manufacturing a hydrogen storage device according to the present invention comprises a first cleaning treatment step for degreasing and cleaning the surface of the base material, and the base material being placed in a vacuum chamber and evacuated, and then the interior of the vacuum chamber. An inert gas replacement step of replacing with an inert gas, a plasma spraying step of forming a hydrogen storage alloy coating by plasma spraying a hydrogen storage alloy on the base material in a vacuum chamber replaced with the inert gas,
A second cleaning step of cleaning the surface of the base material including the hydrogen storage alloy coating formed by the plasma spraying step;
A metal coating deposition step of depositing the base material washed in the second cleaning step into an electroless plating layer to deposit a metal coating on the hydrogen storage alloy coating, and a metal formed by the metal coating deposition step. And a cleaning blasting step of cleaning and blasting the base material containing the coating film.

Further, in the method for manufacturing a hydrogen storage device according to the present invention, a cleaning step of degreasing and cleaning the surface of the base material and a vacuum gas substitution furnace of the low pressure plasma spraying apparatus in which the base material is set are evacuated. And an inert gas filling step of filling with an inert gas, and plasma spraying to form a hydrogen storage alloy coating by plasma spraying a hydrogen storage alloy on the base material in the vacuum gas displacement furnace filled with an inert gas Steps, a scale removing step of blasting the coating surface of the hydrogen storage alloy to remove the scale on the coating surface, and directly irradiating the scale-removed coating surface of the hydrogen storage alloy with a pulsed high-power laser beam A laser beam irradiation step, wherein the hydrogen storage alloy coating is amorphized by repeatedly melting and solidifying the hydrogen storage alloy coating. That.

In addition, the method of manufacturing a hydrogen storage device of the present invention comprises a cleaning step of degreasing and cleaning the surface of the base material, and evacuating the inside of the vacuum gas replacement furnace of the low pressure plasma spraying apparatus in which the base material is set. And an inert gas filling step of filling with an inert gas, and plasma spraying to form a hydrogen storage alloy coating by plasma spraying a hydrogen storage alloy on the base material in the vacuum gas displacement furnace filled with an inert gas Step, a scale removing step of blasting the coating surface of the hydrogen storage alloy to remove scale on the coating surface, and directly irradiating the scale-removed coating surface of the hydrogen storage alloy with a pulsed high-power electron beam And a step of irradiating the hydrogen storage alloy film with an electron beam.

[0023]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to FIGS.

FIG. 1 is a cross-sectional view showing a laminated structure of hydrogen storage and release parts of a hydrogen storage device according to the present invention, in which a surface of a base material 11 made of a material having excellent thermal conductivity such as copper is provided. A hydrogen storage alloy coating 12 is formed, and further, a copper coating 13 is formed on the hydrogen storage alloy coating 12 and is thick enough to allow hydrogen gas to pass therethrough.

Further, a hydrogen storage alloy coating 11A is further formed on the copper coating 13, and the ductile hydrogen storage alloy coating 11A has the same ductility and allows hydrogen gas to pass therethrough. The copper coating 13A having a thickness is formed, and the layer composed of the hydrogen storage alloy coating 12 and the copper coating 13 has a laminated structure having the number of layers corresponding to the hydrogen storage amount.

As described above, by forming the copper coating 13 having a ductility and a thickness that allows hydrogen gas to pass therethrough on the hydrogen storage alloy coating 12, scattering of the hydrogen storage alloy is prevented,
At the same time, hydrogen gas is released.

In the above embodiment, the copper coating is explained, but it goes without saying that other metal such as nickel or aluminum coating may be used.

Next, a treatment method for preventing the hydrogen storage alloy from being oxidized will be described with reference to FIGS.

FIG. 2 is a flow chart showing a treatment process for forming a hydrogen storage alloy coating by performing plasma spraying in an atmosphere of an inert gas using a low pressure plasma spraying apparatus and electroless plating. After degreasing and cleaning the surface of 1) (step S2-1), the base material 11 (FIG. 1)
Is put in the vacuum chamber of the low pressure plasma spraying apparatus (step S2-2), and after vacuuming the chamber, the inside of the chamber is replaced with an inert gas such as argon gas (step S2-3).

In the chamber, a hydrogen storage alloy is plasma sprayed on the base material 11 to form a hydrogen storage alloy coating 12 (FIG. 1) (step S2-4).

At this time, the plasma spraying is required for the hydrogen storage device because a sprayed coating having a porosity of several percent to several tens of percent can be formed by changing the spraying conditions of the low pressure plasma spraying apparatus. The porosity is set in advance in consideration of hydrogen storage performance.

This is because hydrogen gas can store a larger amount of hydrogen gas in a hydrogen storage alloy having a porosity as compared with the case where the hydrogen storage alloy has no porosity.

Then, after forming the hydrogen storage alloy coating 12, the base material 11 is taken out from the chamber at one end,
The surface is washed (step S2-5), and after washing, the base material 11 is placed in an electroless plating bath to deposit a copper coating 13 (FIG. 1) on the hydrogen storage alloy coating 12 (step S2). -6).

Next, after the copper coating 13 having a required thickness is formed, the copper coating 13 is taken out from the electroless plating bath, washed and blasted (step S2-7).

The above process, that is, (step S2-
8) to (step S2-10) are repeatedly performed to form a laminated structure having the required number of layers.

The last surface layer is always the copper coating 13.
A (FIG. 1) is formed so that the hydrogen storage alloy coating 12A (FIG. 1) is not directly exposed to the atmosphere.

Next, a treatment method of forming a copper coating by only a low pressure plasma spraying device instead of forming the copper coating by electroless plating will be described with reference to FIG.

FIG. 3 is a flow chart showing a treatment process for forming a copper coating by a low pressure plasma spraying apparatus. In this treatment method, the apparatus for spraying a hydrogen storage alloy and the apparatus for spraying copper are alternately switched and sprayed. So the base material 11
A film can be formed with (FIG. 1) set in the chamber of a low pressure plasma spraying apparatus, and therefore, a required film can be efficiently formed.

In the figure, first, the surface of the base material 11 is degreased and washed (step S3-1), and the base material 11 is removed.
Is set in the vacuum gas replacement furnace of the low pressure plasma spraying apparatus (step S3-2).

After setting the base material 11, the inside of the vacuum gas replacement furnace is evacuated, and after the vacuum is evacuated, the inside of the vacuum gas replacement furnace is filled with an inert gas (step S3-3).

Next, the hydrogen storage alloy is plasma sprayed on the base material 11 in the vacuum gas displacement furnace to form the hydrogen storage alloy coating 1.
2 (FIG. 1) is formed (step S3-4), the formed coating film surface is blasted by a blasting device, and then the scale on the coating surface is removed (step S3-5).

Next, a copper alloy is plasma sprayed in a vacuum gas displacement furnace to form a copper coating on the hydrogen storage alloy (step S3-6), and the surface of the formed coating is blasted by a blasting device. To remove the scale on the coating surface (step S3-7).

Then, the hydrogen storage alloy is sprayed again by the low pressure plasma spraying apparatus to form the coating film 12 of the hydrogen storage alloy (step S3-8). After forming the coating film 12, the copper alloy is formed by the low pressure plasma spraying apparatus. Coating of copper alloy by thermal spraying 1
3 (FIG. 1) are formed (step S3-9).

After that, the above steps (step S3-
The surface treatment work of 7) is performed, and further, (step S3
-8) to (S3-9) are repeated to form a desired film thickness (step S3-10).

Next, a treatment method for directly irradiating the surface of the hydrogen storage alloy coating with a laser beam to form an amorphous film on the surface will be described with reference to FIG.

FIG. 4 is a flowchart showing the treatment process of the treatment method. First, the surface of the base material 11 (FIG. 1) is degreased and washed (step S4-1), and the base material 11 is subjected to depressurized plasma. It is set in the vacuum gas replacement furnace of the thermal spraying device (step S4-2).

After the setting, the inside of the vacuum gas replacement furnace is evacuated and then filled with an inert gas (step S4-
3) Next, plasma-spray the hydrogen storage alloy on the base material 11 (FIG. 1) to form the coating film 12 (FIG. 1) of the hydrogen storage alloy (step S4-4).

Next, the surface of the hydrogen storage alloy coating 12 is blasted by a blasting device to remove the scale on the coating surface (step S4-5), and after removing the scale,
The surface of the coating is directly irradiated with a high-power laser beam in a pulsed manner, and the hydrogen storage alloy coating 12 is repeatedly melted and solidified to amorphize the coating 12 (step S4-
6).

Thereafter, the processes of (step S4-4) to (step S4-6) described above are repeated to form a desired film thickness (step S4-7).

FIG. 5 is a flow chart showing a processing process in which a high-power electron beam is irradiated in pulses instead of the above-mentioned high-power laser beam. In the processing process in the figure, from (step S5-1) to (step S5-1). S5-5)
Up to the processing process (step S4-1) of FIG.
By the same processing as (step S4-5), (step S5-
In the treatment process of 6), the surface of the coating film 12 is directly irradiated with a high-power electron beam in a pulse shape.

As described above, by forming an amorphous film having high toughness and no grain boundaries on the surface of the hydrogen storage alloy coating, even if hydrogen storage and release are repeated, cracks in the hydrogen storage alloy coating can be completely eliminated. To prevent the refinement phenomenon of hydrogen storage alloy.

FIG. 6 shows that a hydrogen storage alloy coating formed by these coating formation methods stores hydrogen gas, and
It is explanatory drawing which showed the structure of the hydrogen storage apparatus which discharge | releases hydrogen gas from the film | membrane, and the U-shaped heat exchange tube 14 is accommodated in the storage tank 15 in the figure, and the heat exchange tube 14 heat-exchanges. Has a medium inlet 14A and a heat exchange medium outlet 14B, and a heat exchange medium inlet 14
The heat exchange medium 16 is made to flow in from A, and the heat exchange medium 16 made to flow in is made to flow out from the heat exchange medium outlet 14B.

As shown in FIG.
A laminated body 12 ′ made up of the hydrogen storage alloy coating 12 and the copper coating 13 shown in (4) is formed on the surface of the heat exchange tube 14.

On the other hand, the inside of the storage tank 15 is a hydrogen atmosphere portion 15A, and is shielded from the outside air by a storage tank lid 15C attached by a mounting bolt 15B.

The storage tank 15 is also provided with a hydrogen supply port 15D and a hydrogen discharge port 15E, of which a hydrogen supply unit 17 for supplying hydrogen gas to the hydrogen supply port 15D via a bubble 18. The bubble 19 is connected to the hydrogen discharge port 15E, and the hydrogen gas is discharged through the bubble 19.

In the hydrogen storage device having such a structure,
First, when occluding hydrogen gas in the hydrogen occlusive alloy coating, a heat exchange medium 16 such as water is made to flow into the heat exchange tube 14 from the heat exchange medium inlet 14A, and the laminated body 12 ′ is cooled while the hydrogen supply unit 17 is supplied. Hydrogen gas is supplied to the hydrogen range part 15A of the storage tank 15.

On the other hand, when releasing the occluded hydrogen gas, warm water is flown into the heat exchange tube 14 from the heat exchange medium inlet 14A to heat the laminate 12 ', thereby releasing the hydrogen gas into the storage tank 15, and further. The released hydrogen gas is released from the hydrogen release port 15E by adjusting the opening of the bubble 19.

As described above, by forming the hydrogen absorbing alloy coating and the laminated body 12 'on the surface of the heat exchange tube 14, the hydrogen absorbing alloy powder is prevented from being released, and the hydrogen absorbing alloy excellent in heat exchange property is also formed. The device is obtained.

FIG. 7 is a schematic perspective view of a hydrogen storage device showing another embodiment of the present invention. In this embodiment, a pair of rectangular plate-shaped base materials 20A having a hydrogen storage alloy coating 22A and a laminated film made of a fine powder release prevention coating 23A made of, for example, a copper coating on the surface thereof are used.
A pair of these plate-shaped base materials 20A are arranged such that the surfaces on which the laminated film is formed face each other with a space therebetween, and a pair that forms a hydrogen gas storage space 21A for storing pressurized hydrogen gas together with these facing surfaces. A first hydrogen gas storage unit 24 composed of the first spacer 21 is prepared. Next, a second hydrogen gas storage unit 25 having the same structure as the first hydrogen gas storage unit 24 is prepared. These first
And the back surfaces of the plate-shaped base materials 20A and 20B constituting the second hydrogen gas storage units 24 and 25, respectively, are opposed to each other with a space therebetween, and a heat exchange medium storage space for storing a heat exchange medium together with these opposed surfaces. 26A is provided with a pair of second spacers 26.

First and second hydrogen gas storage unit 2
The hydrogen gas storage spaces 21A of 4 and 25 are respectively
The upper and lower ends of the hydrogen gas storage units 24 and 25 have hydrogen gas inlets and outlets (not shown), and the hydrogen gas H ₂ is introduced from the inlet at the upper end and the lower end at the lower end. It is discharged from the discharge port of.

First and second hydrogen gas storage unit 2
Heat exchange medium storage space 26A formed between 4 and 25
Has inlets and outlets (not shown) for the heat exchange medium at the front and rear ends of each unit 24 and 25, and, for example, water H ₂ O is introduced from the inlet at the front end as indicated by the arrow. And is discharged from the discharge port at the rear end.

As described above, in this embodiment, instead of the heat exchange tube shown in FIG. 6, a pair of plate-shaped base materials 20 is used.
A plate heat exchanger having a heat exchange medium storage space 26A formed by a plate-shaped base material composed of A and 20B is adopted, and plate hydrogen storage units 24 and 25 are provided on both sides of the plate heat exchanger. It is arranged.

By adopting such a plate type heat exchanger and hydrogen storage unit, the hydrogen storage device can be made compact. When the plate-type hydrogen storage device is used in combination with a hydrogen gas utilization device such as a fuel cell, the entire device can be made compact.

[0064]

As described above, according to the present invention, the hydrogen storage alloy coating film is formed to minimize the cracking of the crystal grains, and further the ductile metal coating film is formed thereon. It is possible to prevent the atomized hydrogen storage alloy from being scattered to the outside in a more complete state, and as a result, it is possible to provide clean hydrogen gas.

Further, according to the present invention, since the hydrogen storage alloy is sprayed in the inert gas, the hydrogen storage alloy is not oxidized during the spraying, and as a result, the composition change of the hydrogen storage alloy is caused. As a result, the hydrogen storage performance can be completely prevented from deteriorating.

Further, according to the present invention, since the hydrogen storage alloy coating is formed on the surface of the heat exchanger, it is possible to realize a hydrogen storage device which is excellent in heat exchange property and which can store and release hydrogen.

Further, according to the present invention, since an amorphous film having high toughness and no grain boundaries is formed on the surface of the hydrogen storage alloy coating, the hydrogen storage alloy can be formed even if hydrogen storage and release are repeated. The phenomenon of cracking and miniaturization can be completely eliminated.

Further, according to the present invention, the plates on which the hydrogen storage alloy coating is formed are alternately laminated to form the ports for supplying hydrogen gas and the flow paths for the heat exchangers of water and hot water. Therefore, both compactness of the hydrogen storage device and more efficient heat exchange can be realized.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a laminated structure of a hydrogen storage device according to the present invention.

FIG. 2 is a flowchart showing a forming treatment process for forming a hydrogen storage alloy coating and a copper coating according to the present invention.

FIG. 3 is a flow chart showing another forming treatment process for forming a hydrogen storage alloy coating and a copper coating according to the present invention.

FIG. 4 is a flowchart showing still another forming treatment process for forming the hydrogen storage alloy coating and the copper coating according to the present invention.

FIG. 5 is a flow chart showing still another forming treatment process for forming the hydrogen storage alloy coating and the copper coating according to the present invention.

FIG. 6 is an explanatory diagram showing a configuration of a hydrogen storage device according to the present invention.

FIG. 7 is a perspective view showing a configuration of a hydrogen storage device according to the present invention.

FIG. 8 is a configuration block diagram showing a configuration of a conventional hydrogen storage device.

FIG. 9 is an explanatory view schematically showing crystal grains of a hydrogen storage alloy.

[Explanation of symbols]

1 crystal grain 2 cracks 3 Hydrogen storage alloy 4,15 Storage tank 5,14 heat exchange tube 5A inlet 6,17 Hydrogen supply unit 7 Pressure gauge 8, 10, 18, 19 valves 9 Dust collection filter 11,20A, 20B Base material 12,12A, 22A, 22B Hydrogen storage alloy coating 13,13A, 23A, 23B Copper coating 14A Heat exchange medium inlet 14B Heat exchange medium outlet 15A hydrogen atmosphere 15B mounting bolt 15C storage tank lid 15D Hydrogen supply port 15E Hydrogen outlet 16 heat exchange medium 21 Spacer 24 waterproof spacer 25 Heat exchange medium inlet

Claims (11)

[Claims] 1. A hydrogen gas storage tank in which pressurized hydrogen gas is stored, a hydrogen storage alloy coating formed on the surface of a base material disposed in the hydrogen gas storage tank, and a hydrogen storage alloy coating on the hydrogen storage alloy coating. A hydrogen storage device comprising: a fine powder release preventing film that allows hydrogen gas to pass through but does not allow the fine powder of the hydrogen storage alloy to pass through; and a temperature control unit that selectively controls the temperature of the base material. 2. The hydrogen storage device according to claim 1, wherein the fine powder release preventing coating is made of a metal coating such as copper, nickel or aluminum or a resin coating. 3. The hydrogen storage device according to claim 2, wherein a plurality of laminated bodies including the hydrogen storage alloy coating and the fine powder release prevention coating are laminated. 4. The hydrogen storage device according to claim 3, wherein the hydrogen storage alloy coating is formed by low pressure plasma spraying. 5. The hydrogen storage device according to claim 4, wherein the fine powder release preventing coating is formed by electroless plating or low pressure plasma spraying. 6. A hydrogen supply port and a hydrogen discharge port are provided,
A heat exchange medium having a hydrogen gas storage tank in which pressurized hydrogen gas is stored, a main body portion provided in the hydrogen gas storage tank, and a heat exchange medium inlet and a heat exchange medium outlet outside the hydrogen gas storage tank. A hydrogen storage device comprising: a tube; and a hydrogen storage alloy coating and a fine powder release prevention coating laminated on the surface of the main body of the heat exchange tube. 7. A pair of plate-shaped base materials on which a laminated film composed of a hydrogen storage alloy coating and a fine powder release prevention coating is formed, and a surface on which the laminated film is formed. First and second hydrogen gas storage units, which are arranged so as to face each other with a space therebetween and which together with these facing surfaces form a pair of first spacers that form a hydrogen gas storage space for storing pressurized hydrogen gas, , The back surfaces of the plate-shaped base materials constituting the first and second hydrogen gas storage units are opposed to each other with a space therebetween, and together with these opposed surfaces form a heat exchange medium storage space for storing a heat exchange medium. A hydrogen storage device comprising a pair of second spacers. 8. The hydrogen gas storage space has hydrogen supply ports and hydrogen discharge ports at both ends thereof, and the heat exchange medium storage space has a heat exchange medium inlet and a heat exchange medium outlet at both ends thereof. The hydrogen storage device according to claim 7. 9. A first cleaning treatment step of degreasing and cleaning the surface of a base material, and an inert gas in which the base material is placed in a vacuum chamber and evacuated, and then the interior of the vacuum chamber is replaced with an inert gas. A gas replacement step, a plasma spraying step of forming a hydrogen storage alloy coating film by plasma spraying a hydrogen storage alloy on the base material in a vacuum chamber replaced with the inert gas, and hydrogen formed by this plasma spraying step. A second cleaning step of cleaning the surface of the base material containing the storage alloy coating, and the base material cleaned by the second cleaning step is placed in an electroless plating layer to form a metal coating on the hydrogen storage alloy coating. A metal film deposition step of depositing and forming,
And a cleaning blast step of cleaning and blasting the base material containing the metal coating formed by the metal coating deposition step. 10. A cleaning step of degreasing and cleaning the surface of the base material, and a vacuum gas replacement furnace of a low pressure plasma spraying apparatus in which the base material is set is evacuated and then filled with an inert gas. A step, a plasma spraying step of forming a hydrogen storage alloy coating by plasma spraying a hydrogen storage alloy on the base material in the vacuum gas displacement furnace filled with an inert gas, and a coating surface of the hydrogen storage alloy. A scale removal step of removing the scale on the coating surface by blasting, and directly on the coating surface of the hydrogen storage alloy from which the scale has been removed,
A laser beam irradiation step of irradiating a pulsed high-power laser beam, wherein the hydrogen storage alloy coating is amorphized by repeating melting and solidification of the hydrogen storage alloy coating. Production method. 11. A cleaning step for degreasing and cleaning the surface of the base material, and a vacuum gas replacement furnace of a low pressure plasma spraying apparatus in which the base material is set is evacuated and then filled with an inert gas. A step, a plasma spraying step of forming a hydrogen storage alloy coating by plasma spraying a hydrogen storage alloy on the base material in the vacuum gas displacement furnace filled with an inert gas, and a coating surface of the hydrogen storage alloy. A scale removing step of removing the scale of the coating surface by blasting, the coating surface of the hydrogen storage alloy from which the scale has been removed directly, comprising an electron beam irradiation step of irradiating a high-power electron beam in a pulse form, A method for manufacturing a hydrogen storage device, which comprises making the hydrogen storage alloy coating amorphous.