JP2001200159A - Molded product of hydrogen storage composite and method for producing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a molded product of a hydrogen storage composite, hardly causing pulverization and corruption even if the storage and emission of the hydrogen is repeated for a long period, and excellent in moldability and processability, and further to provide a method for producing the molded product of the hydrogen storage composite. SOLUTION: This molded product of the hydrogen storage composite comprises a silicon resin preferably of 0.5-50 wt.%, and a hydrogen storage material. The method for producing the molded product of the hydrogen storage composite is characterized in that the hydrogen storage material is pressure- molded, the molded product is immersed into a solution dissolving or dispersing the silicone resin, and the resultant product is cured. Further, the method for producing the molded product of the hydrogen storage composite is characterized in that one selected from the silicone resin itself, a silicon resin solution and a silicone resin dispersion is mixed with the hydrogen storage alloy, and the resultant mixture is molded and cured.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a silicon resin-containing hydrogen-absorbing composite molded article and a method for producing the same, and more particularly, to a hydrogen-absorbing material which does not cause pulverization or deformation even if hydrogen is repeatedly absorbed and released for a long period of time. The present invention relates to a hydrogen storage composite article containing a silicon resin as a binder and a method for producing the same.

[0002]

2. Description of the Related Art Hydrogen storage alloys are used as a hydrogen storage material in stationary tanks, hydrogen supply sources for fuel cells, use in hydrogen vehicles, etc., heat generated during hydrogen storage and release, and heat as an energy conversion material utilizing heat absorption. In addition to use in storage systems, they have been used in hydrogen separation and purification materials, catalysts, sensors, and the like. In many cases, the hydrogen storage alloy is used after being filled in a container in a state of powder of several mm or less, but many problems have been pointed out in such a usage method. The basic problem is that the hydrogen storage alloy expands and contracts by a maximum of 30% during hydrogen storage and release, and its stress causes the pulverization to proceed. Along with that, destruction of the container due to volume expansion and clogging of the filter attached to the container,
Hydrogen storage / release capacity is reduced due to a decrease in thermal conductivity, which is an obstacle to practical use. In particular, when the fuel cell is used in a hydrogen supply source of a fuel cell, a hydrogen vehicle, or the like, there is a problem that the hydrogen storage alloy accumulates at the bottom of the tank due to vibration during traveling. For this reason, a hydrogen storage material which does not become finely divided even when hydrogen is repeatedly stored and released for a long period of time is expected.

[0003] As hydrogen storage materials using a hydrogen storage alloy, Japanese Patent Publication No. 58-20881 and Japanese Patent Application Laid-Open No.
JP-A-5001 and JP-A-8-11241 have been proposed. Each of these techniques is a technique using a synthetic resin, but has problems in that it is difficult to handle and that the rate of absorbing and releasing hydrogen decreases. In particular, Japanese Patent Application Laid-Open No. HEI 8-11241 describes the use of a fluororesin. However, a molded article made of a fluororesin has a problem that the elasticity of the occlusion body is poor and the gas release rate is low due to gas permeability.

[0004]

SUMMARY OF THE INVENTION The present invention aims to solve the problems associated with the prior art as described above, and has a high heat resistance even when hydrogen is repeatedly stored and released for a long period of time.
The present invention relates to a silicon resin-containing hydrogen-absorbing composite molded article having excellent dimensional stability, excellent in weather resistance, excellent in moldability and workability, and not particularly collapsed when an alloy is used, and a method for producing the same.

[0005]

The silicon resin-containing hydrogen-absorbing composite molded article according to the present invention is characterized in that the hydrogen-absorbing material uses a silicon resin as a binder particularly from the viewpoint of hydrogen-absorbing properties. Further, the hydrogen storage composite molded body contains 0.5 to 50% by weight of a silicone resin as a binder in the composite molded body.
It is desirable to include. The method for producing a silicon resin-containing hydrogen-absorbing composite molded article according to the present invention comprises the steps of: molding a hydrogen-absorbing material under pressure; impregnating the silicon resin with a solution in which a silicon resin is dissolved or dispersed in a solvent; And a resin or a solution in which the resin is dissolved or dispersed in a solvent, and the mixture is cured after molding. According to the method for producing a silicon resin-containing hydrogen storage composite molded article of the present invention, a hydrogen storage composite molded article having an arbitrary shape such as a square shape, a cylindrical shape, a disk shape, a tube shape, and a thin film shape can be produced. The molded article of the present invention has a function of absorbing and releasing hydrogen by itself. In particular, by containing the silicon resin of the present invention, the hydrogen storage composite molded article uses a silicon resin excellent in elasticity as a binder, so that collapse and deformation due to hydrogen storage and release do not occur even in a region where the amount of the binder is small, Further, due to the excellent gas permeability of the silicon resin, it is possible to obtain almost the same characteristics as those of the material using the hydrogen absorption rate and hydrogen absorption amount. Further, since silicon resin has stable rubber elasticity in a wide temperature range from -70 ° C to 250 ° C, it is possible to prevent the hydrogen storage material from collapsing and deforming even in an extremely cold environment on a low temperature side, and at a higher temperature. Of hydrogen can be absorbed and released, and a hydrogen storage composite article having a high release efficiency can be obtained. Further, according to the present invention, it is possible to provide a hydrogen-absorbing composite molded article having rubber elasticity, which does not collapse or denature even if hydrogen absorption and release of an arbitrary shape is repeated by molding methods such as pressure molding and extrusion molding. In addition, it becomes possible to store and release hydrogen at a higher temperature, so that the allowable range of the device design can be expanded.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a silicon resin-containing hydrogen-absorbing composite molded article and a method for producing the same according to the present invention will be described in detail. The hydrogen storage material used in the present invention,
Preferably, it is selected from metals, carbon materials and alloys having a hydrogen storage capacity. Examples of the carbon material include nanotubes, fullerenes, graphite, and nanofibers. As the hydrogen storage material used in the present invention, MmNi ₅
System (Mm represents misch metal, part of La is Ce,
It is substituted with Pr, Nd or other rare earth elements. ) Is most preferable, but other than these, Li, Na, Ca, Ti, Zr, V, A
1, Ga, Sn, As, B, Si, Ge, Pd, Pt,
At least one metal selected from rare earth elements such as La, or Li-B, Na-B, Li-Al, Na-A
l, a metal having a hydrogen storage / release capability such as a complex compound such as misch metal, and the shape of the hydrogen storage material to be used is a particle having a particle size that can be dispersed in a silicon resin in a desired composite molded product. First, the hydrogen storage alloy powder used in the present invention will be described. The composition and production method of the hydrogen storage alloy mass used for the hydrogen storage alloy powder are not particularly limited, and the structure of AB _n (n represents a positive number of 0.5 to ₆ ), for example, MmNi ₅ series , Mg-Ni or BCC-Laves structure such as Ti-V, Ti-
A hydrogen storage alloy having a Cr system can be used.
Here, as an example, a case of an AB ₅ (MmNi ₅ ) hydrogen storage alloy composition will be described in detail. In AB ₅ type, A side element, a mixture of La alone or one or more rare earth elements and La,. Specifically, La, Mm,
Lm (Lm refers to a La-rich misch metal containing 50% by weight or more of La), or a mixture obtained by adding another rare earth element to a mixture thereof. Further, it is preferable that the rare earth element mixture contains La in an amount of 20 mol% or more. As the B-side element, (Ni) _a (Co) _b (Al) _c (M
A composition consisting of n) _d (M) _e is preferred. Where a is 1.8
B is a positive number of 0 or 1.0 or less, c is a positive number of 0 or 1.0 or less, d is 0 or 1.
E is a positive number of 0 or less, and e is a positive number of 0 or 0.5 or less.
M is Si, Fe, Pb, Ti, Ca, Mg, Cu, I
It is at least one element selected from the group consisting of n, Zn, Cr and Zr.

After mixing the metal elements having the above composition, the mixture is heated to 1300 to 1600 ° C. in an atmosphere of an inert gas such as argon.
After the alloy is melted by using a high-frequency melting furnace or an arc melting furnace at the temperature described above, a hydrogen storage alloy lump is produced by cooling. In this case, a hydrogen storage alloy ribbon obtained by a quenching method such as a roll quenching method, or a spherical hydrogen storage alloy powder obtained by a disk atomization method may be used. If necessary, the heat treatment may be performed at a temperature of about 1000 ° C. in an inert atmosphere such as Ar.

Next, the hydrogen storage alloy block is pulverized to produce a hydrogen storage alloy powder. As a pulverizing method, it is preferable to use a jet mill, an attritor, a jaw crusher, a roller mill, a ball mill, a brown mill, or the like to pulverize the particles to an average particle diameter of 500 μm or less in an inert gas atmosphere such as argon or nitrogen gas. Alternatively, pulverization may be performed by hydrogenation pulverization. In the case of a hydrogen storage alloy spherical powder obtained by a disk atomizing method, it may be used in the form of a spherical powder or may be further pulverized and used. The hydrogen storage alloy powder having an average particle diameter of 500 μm or less is
This is because the reaction area in the initial stage is small and the hydrogen gas absorption rate is not reduced. The average particle size of the hydrogen storage alloy powder depends on the shape of the composite molded product, but is preferably finer from the viewpoint of moldability, and is preferably 100 μm or less. At this time, a pretreatment may be performed on the surface of the hydrogen storage material with a silane coupling material or the like.

The thus obtained hydrogen storage material is molded using a silicon resin as a binder to obtain a hydrogen storage composite molded product. Further, from the viewpoint of hydrogen storage and release, it is preferable to use a silicon resin having a small dimensional change due to hydrogen storage and release and excellent in dimensional stability also as a binder of the molded body.
In the present invention, in particular, the silicone resin used as the binder is not particularly limited except that it has elasticity after crosslinking and curing, and widely includes materials known as silicone rubber, silicone elastomer plastic, junction coating resin, and the like. Among them, in the present application, it is preferable to use silicone rubber from the viewpoint of the shape of the molded body. Silicone rubber is available in various grades depending on its form, curing mechanism, etc., and is a millable silicone rubber containing diorganopolysiloxane of high degree of polymerization (linear polymer having a viscosity of several million cp) as a main component and low degree of polymerization. It is roughly classified into a liquid silicone rubber containing diorganopolysiloxane (a linear polymer having a viscosity of 100 to 100,000 cp) as a main component.
In particular, in the present application, it is preferable to use a liquid silicone rubber, and a silicon resin classified into a one-component system and a two-component system depending on the form. The curing mechanism includes a radical curing system, an addition curing system, a condensation curing system, and the like.
A wide variety of products such as a room temperature curing type have been put into practical use, and all of the exemplified products can be applied as the binder of the present invention. In addition, in addition to the diorganopolysiloxane of the main component, a filler, a wetting agent, a crosslinking agent,
It is possible to add a curing catalyst, etc., and if necessary, mesh siloxane as a reinforcing material, non-functional siloxane for lowering hardness, bonding aid, heat-resistant aid, carbon black for imparting conductivity And the like can be added according to the purpose. As the diorganopolysiloxane as the main component, dimethylpolysiloxane is most common, but in addition to a methyl group, an alkyl group such as an ethyl group, a phenyl group, a fluoroalkyl group, or the like can be used according to the purpose. As the terminal group, it is common to use a terminal group to which a hydroxyl group, an alkoxy group, a vinyl group or the like having a functional property is provided. Further, the linear organopolysiloxane may contain a silalkylene bond or a modified site such as polyether, polyester, or urethane, depending on the purpose. According to the curing mechanism, a crosslinking agent for making a crosslinked rubber elastic body is required in other curing systems except for a heat curing type using an organic peroxide as a catalyst. In the condensation curing reaction system,
By-products during the condensation curing reaction include the conventional de-acetic acid type, de-alcohol type, de-amine type, de-oxime type, etc.Polyfunctional silanes and siloxanes corresponding to each are used as cross-linking agents and cured. Examples of the catalyst include metal organic acid salts, amines and titanates. In addition-curing systems, an unsaturated group-containing diorganopolysiloxane contains two SiH groups.
It is common to use hydrogen silanes or siloxanes having at least one of them as a crosslinking agent, and further use a platinum-based curing catalyst in combination. The curing conditions for these silicon resins vary depending on the type of resin used, but include those that cure at room temperature, and include heating at room temperature to about 350 ° C. for crosslinking and curing. Specifically, room temperature to 8 for the condensation curing system
Curing can be performed by heating at 0 ° C., by heating at room temperature to 200 ° C. in an addition curing system, and by heating at 100 to 300 ° C. in a radical curing system. In the present invention,
Although any of these types of silicone resin can be used, it is relatively easy to control the working time for impregnation into the hydrogen storage material, kneading into the material, etc., in consideration of workability, productivity, etc. It is advantageous to select an addition curing system and a radical curing system which can be cured quickly and in a short time by heating. The silicon resin as a binder can be used as it is, but from the method for producing a hydrogen storage composite molded article described later, it can be used as a solution type dissolved in a solvent such as toluene or xylene or an emulsified dispersion type. desirable. Further, in order to have the hydrogen absorbing and releasing properties of the present application, it is necessary to consider the characteristics of the silicone resin from the viewpoint of durability and weather resistance, and the hardness (durometer A) is 0 to 100, preferably 0 to 70, and elongation. It is also preferable to use a resin having about 20 to 1000%, preferably about 50 to 700%. If the hardness of the resin is too hard, the shape of the molded body when the occlusion material absorbs and releases hydrogen changes, and if the hardness is too low, the desired shape of the molded body may not be obtained. Similarly, if the elongation is too small or too large, the rubber elasticity effect is lost, and the dimensional stability of the molded article is deteriorated. The content of the silicon resin contained in the hydrogen storage composite molded product is preferably 0.5 to 50% by weight, more preferably 0.5 to 20% by weight, and still more preferably 1 to 10% by weight as a binder.
It is about. A molded body made of a binder in this range has characteristics of being elastic, and having a large content ratio of the hydrogen storage material and a large hydrogen storage amount. If the amount is less than 0.5% by weight, it is difficult to maintain the shape of the hydrogen storage composite molded article due to expansion and contraction at the time of hydrogen storage and release as a binder, and if it exceeds 50% by weight, the hydrogen storage amount per unit volume as the hydrogen storage body is reduced. It is because it decreases. In particular, there is a method in which the silicon resin is used as it is, and a method in which the silicon resin is used as a solution or a dispersion. When used as a solution, examples of the solvent include toluene, hexane, and water. When used as a dispersion, as a dispersion medium,
Water, alcohol and the like can be mentioned.

As a method for producing a hydrogen storage composite molded article,
After pressure-molding the hydrogen storage material, for example, at a pressure of 0.05 MPa or more, the obtained composite molded body is dissolved or dispersed in a solvent of a silicon resin in a solution prepared to have a predetermined silicon resin concentration. There is a method of curing after impregnation. As a result, the silicon resin in the pores of the composite molded body fixes the hydrogen storage materials as a binder, and furthermore, due to the elasticity of the silicon resin, absorbs the expansion and contraction of the alloy particularly during hydrogen storage and release. Even if the storage / release cycle is repeated, the hydrogen storage material is not pulverized and disintegrated. Further, by the method of impregnating the binder after the pressure molding, the contact between the powders of the hydrogen storage material is maintained as it is, so that the thermal conductivity of the composite molded body is improved.

Another method for producing the hydrogen-absorbing composite molded article is to mix well the obtained hydrogen-absorbing material, particularly the hydrogen-absorbing alloy powder, and a predetermined amount of a silicon resin or a liquid obtained by dissolving or dispersing the silicon resin in a solvent. A method of molding and curing is used.
In this case, since the silicon resin is molded in a state of covering the surface of the hydrogen storage alloy powder, the hydrogen storage alloy powder is fixed with the silicon resin as a binder sandwiched therebetween. The elasticity can be enhanced, and the dimensional stability and durability against repeated hydrogen storage and release can be improved. In this production method, the ratio of the silicon resin contained in the hydrogen storage composite molded article can be arbitrarily set.
5 to 50% by weight is preferred. Further, an arbitrary molding method such as pressure molding, extrusion molding, thinning, and the like can be selected depending on the type and content of the silicon resin to be used.

In the silicon resin-containing hydrogen-absorbing composite molded article obtained by the present invention, the silicon resin partially adheres to the surface of the hydrogen-absorbing material or covers the entire surface, but the silicon resin has a very high gas permeability. Excellent hydrogen absorption and desorption ability of the alloy due to its excellent qualities.No reduction in hydrogen storage and desorption speed.Furthermore, due to the elasticity of silicon resin, even if hydrogen storage and desorption are repeated, it can be pulverized and disintegrated. It can be used without long-term use. Further, since a molding method and a curing method can be arbitrarily selected depending on the type of the silicon resin, it is possible to obtain a hydrogen storage composite molded article having any shape such as a square shape, a cylindrical shape, a disk shape, a tube shape, and a thin film shape.

[0013]

EXAMPLES Hereinafter, the present invention will be described in more detail with reference to examples, but the present invention is not limited thereto. Example 1 Hydrogen storage alloy ingot (La 34 wt%, Ce 45 wt%, Pr 6 wt%, Nd
15 wt% to atomic ratio 1.0, Ni 3.75, C
(0.75 for O, 0.20 for Mn, and 0.30 for Al) were heat-treated in argon to prepare a uniform hydrogen storage alloy ingot. The alloy ingot was coarsely pulverized in a nitrogen atmosphere. Further, the mixture was pulverized to a size of 1 mm or less with a brown mill to obtain a raw material for a jet mill. Furthermore, in the present invention,
The hydrogen storage alloy is dry-pulverized by a jet mill under a gas pressure of 5.8 kgf / cm ² and a nitrogen gas atmosphere to obtain an average particle size of 6 μm.
A hydrogen storage alloy fine powder having a particle size distribution width of 1 to 30 μm was obtained.
Next, about 2.6 g of the pulverized fine powder was placed in a mold, and a pressure of 2 g was applied.
Outer diameter 11mm, inner diameter 7mm, length 10mm at 00MPa
Into a cylindrical shape. This hydrogen-absorbing alloy molded product was treated with a silicon resin (KE1820 manufactured by Shin-Etsu Chemical Co., Ltd., dimethylpolysiloxane having a vinyl group blocked at both ends (viscosity of 10,000 cp: 20).
C) as a main component, an additional one-component silicon-silicon resin, hardness (durometer A) 40, elongation 650%, tensile strength 5.4M
Pa) was placed in a 20% by weight solution of toluene, degassed for a certain period of time, and immersed for one hour to confirm that the binder solution had sufficiently penetrated into the molded body, and then taken out and dried. Thereafter, the molded body was heated and cured at 120 ° C. for 2 hours under an argon atmosphere to obtain a silicon resin-containing hydrogen storage composite molded body. The binder impregnation amount (solid content) was about 2% by weight based on the weight of the hydrogen storage composite molded article. When the rebound resilience of the obtained molded article was measured in accordance with JIS K 6255, the rebound resilience was 16%.

Example 2 A hydrogen-absorbing alloy molded article prepared in the same manner as in Example 1 was prepared using a silicone resin (KE45TS manufactured by Shin-Etsu Chemical Co., Ltd., dimethylpolysiloxane having silanol groups at both ends and having a viscosity of 20,000 c.
Deoxime type one-component condensation-curable silicone resin containing p) as a main component, hardness 20, elongation 300%, tensile strength 2.0MP
a) is placed in a 20% by weight solution in toluene,
After degassing for a certain period of time and immersing for 1 hour, it was confirmed that the binder solution had sufficiently penetrated into the inside of the molded body, and then taken out, followed by condensation curing in the air for 7 days to obtain a silicon resin-containing hydrogen absorbing molded body. The binder impregnation amount (solid content) was about 2.5% by weight based on the weight of the hydrogen storage molded article. Similar to Example 1, the rebound resilience was 19%.

Example 3 Each element weighed so as to have the same alloy composition as in Example 1 was melted in an argon atmosphere, and then rotated at a temperature of 1450 ° C. from a zirconia nozzle (pore diameter: 5 mm). Spherical hydrogen-absorbing alloy atomized powder obtained by supplying to a disk and silicon resin (KE manufactured by Shin-Etsu Chemical Co., Ltd.)
1820) was mixed at a ratio of 9: 1 (weight). At this time, the silicon resin was diluted with toluene to 40% by weight so as to be sufficiently mixed, and mixed. After drying and removing toluene in the air, 1 g of the obtained mixture was placed in a circular mold having a diameter of 10 mm, and pressure-molded at a pressure of 715 MPa.
It was cured by heating at 0 ° C. for 2 hours to obtain a silicon resin-containing hydrogen storage molded article. As in Example 1, the rebound resilience was 23%.

Example 4 A hydrogen-absorbing alloy mass produced in the same manner as in Example 1 was roughly pulverized to a particle size of about 2 mm in a nitrogen atmosphere with a jaw crusher, and then subjected to an impact-type pin mill in a nitrogen atmosphere.
It was pulverized to μm to obtain a hydrogen storage alloy powder. The obtained hydrogen storage alloy powder and silicon resin (KE182 manufactured by Shin-Etsu Chemical Co., Ltd.)
0) was mixed at a ratio of 8: 2 (weight). At this time, the silicon resin was diluted with toluene to 40% by weight so as to be sufficiently mixed, and mixed. After drying and removing the toluene in the air, the mixture in the form of a paste is extruded and shaped to a diameter of 5 mm.
The string was heat-cured at 120 ° C. for 2 hours in argon to obtain a silicon resin-containing hydrogen-absorbing composite molded article. As in Example 1, the rebound resilience was 30%.

COMPARATIVE EXAMPLE 1 A molded article in Example 1 which is obtained by simply pressing and using no binder is referred to as Comparative Example 1. The rebound resilience was measured in the same manner as in Example 1. However, it was impossible to measure the rebound resilience because the formed body was made only of the alloy.

Comparative Example 2 A hydrogen-absorbing alloy molded body prepared in the same manner as in Example 1
After degassing for a certain period of time in a weight% PVA aqueous solution (PVA polymerization degree: 2000) and immersing for one hour, it was confirmed that the binder solution had sufficiently penetrated into the inside of the molded body, and then taken out and dried. At this time, the binder impregnation amount (solid content) was about 0.4% by weight of the weight of the hydrogen storage material. Although the rebound resilience was measured in the same manner as in Example 1, it was difficult to measure the rebound resilience in the same manner as in Comparative Example 1 because the resin was only impregnated with the binder.

Measurement of Apparent Density The dimensions and weight of the hydrogen storage molded articles obtained in Examples 1 to 4 and Comparative Examples 1 and 2 were measured, and the apparent density per hydrogen storage alloy was calculated. Measurement of hydrogen absorption rate The hydrogen storage properties of the hydrogen storage molded materials obtained in Examples 1 to 4 and Comparative Examples 1 and 2 were measured. The hydrogen storage material was set in a PCT measuring apparatus (manufactured by Resca), evacuated at room temperature for 1 hour, and then hydrogen gas at 80 ° C and 3 MPa was introduced to activate the sample. The activation time required was about 30 minutes to 1 hour. After evacuating the activated sample for 1 hour, 3 MPa of hydrogen was introduced, and the time for absorbing hydrogen up to 0.9% by weight with respect to the alloy was measured. Measurement of PCT characteristics The activated sample was evacuated for 1 hour, and then the PCT (pressure, composition, temperature) characteristics were measured at a temperature of 80 ° C. The PCT characteristic was converted into a hydrogen storage / release amount per hydrogen storage alloy. After the PCT characteristic measurement, the sample was taken out by evacuating to vacuum at 80 ° C. for 1 hour, the shape was observed, and the collapsed state was observed. The results are shown in Table 1, and FIG. 1 shows a PCT characteristic curve of the hydrogen storage molded article of Example 1. The hydrogen storage amount (% by weight) at a pressure of 1 MPa in the obtained PCT characteristic curve was defined as the maximum storage amount.

[0020]

[Table 1]

[0021]

The silicon resin-containing hydrogen storage composite molded article of the present invention uses a silicon resin having excellent elasticity as a binder, so that collapse and deformation due to hydrogen storage and release do not occur even in a region where the amount of the binder is small, In addition, due to the excellent gas permeability of the silicon resin, almost the same characteristics as those of the original alloy using the hydrogen absorption rate and hydrogen absorption amount were obtained. Further, according to the present invention, it is possible to provide a hydrogen-absorbing composite molded article having an arbitrary shape by a molding method such as pressure molding and extrusion molding, which does not collapse or deform even when hydrogen absorption and release are repeated.

[Brief description of the drawings]

FIG. 1 shows a PCT characteristic curve of a hydrogen storage molded article of Example 1.

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Claims (7)

[Claims] 1. A hydrogen storage composite molded article containing a hydrogen storage material and a silicon resin. 2. The hydrogen storage composite article according to claim 1, wherein the hydrogen storage material is selected from a metal, a carbon material, and an alloy having a hydrogen storage and release capability. 3. The hydrogen storage composite article according to claim 1, wherein the hydrogen storage material is a hydrogen storage alloy. 4. The method according to claim 1, wherein the silicon resin is a radical-curable rubber,
2. The rubber composition according to claim 1, which is selected from addition-curable rubbers and condensation-type rubbers.
4. The hydrogen storage composite molded article according to any one of items 1 to 3, 5. The hydrogen storage composite article according to claim 1, wherein said silicon resin is contained in an amount of 0.5 to 50% by weight. 6. A method for producing a hydrogen-absorbing composite molded body, comprising: molding a hydrogen-absorbing material under pressure, impregnating it with a silicon resin solution or a silicon resin dispersion, and curing. 7. A hydrogen-absorbing composite molded article characterized by mixing a hydrogen-absorbing material with one selected from the group consisting of a silicon resin itself, a silicon resin solution and a silicon resin dispersion, and then molding and curing the mixture. Production method.