WO2015169758A1 - Hydrogen-storing component composed of slip, device, and method therefor - Google Patents

Abstract

The invention relates to a method for producing a hydrogen storage element for a hydrogen store, wherein slip is provided, which has a hydrogen storage material. The slip is introduced into a mold and moisture is withdrawn from the slip in order to produce a body. The hydrogen storage element is produced from the body.

Description

 Hydrogen-storing component of slip with apparatus and method therefor

The present patent application claims the priority of German Patent Application 10 2014 006 379.8 of May 5, 2014, the content of which is hereby incorporated by reference into the subject matter of the present patent application.

The present invention relates to a method and an apparatus for producing a hydrogen storage element for a hydrogen storage and a hydrogen storage component for a hydrogen storage. In the following, the terms "element" and "component" are used synonymously. It is known that hydrogen storage, for example, have compressed, hydrogen-storing metal alloys, which are made of powder. Examples of this are described in DE-C-195 46 904, DE-A-40 30 626 and DE-A-40 33 227. The object of the present invention is to provide a simple way of producing a hydrogen storage component having a high density of the hydrogen storage material.

This object is achieved by a method having the features of claim 1, by a device having the features of claim 17 and by a component having the features of claim 23. Advantageous features, embodiments and further developments will become apparent from the following description, the figures as well as from the claims, wherein individual features of an embodiment are not limited to these. Rather, one or more features of an embodiment of the invention with one or more features of another embodiment of the invention to further invention embodiments can be linked. Also, the formulations particularly of the independent claims are not limiting the objects to be claimed. One or more features of the claim formulations can therefore be exchanged as well as omitted, but also be supplemented in addition. The features cited with reference to a specific exemplary embodiment can also be generalized or also used in other exemplary embodiments, in particular applications.

Alternatively, the invention further proposes a method for producing a hydrogen storage component of a hydrogen storage device with the following steps. A first step comprises producing a slip comprising a hydrogenatable material, in particular a hydrogenatable metal. A second step involves creating a blank from the slurry containing the hydrogenatable material, preferably in layer form. A third step involves the removal of residual moisture / liquid from the blank and optionally the further processing of a hydrogen storage component from the blank. The same component can then be used for hydrogen storage. Here, the slip is already pre-dried to the extent that it allows processing as a layer to a blank. The slurry prepared in the first step preferably comprises a liquid, for example water, wherein the liquid content in the slurry may be about 15-25%. In the second step, the blank is created in particular by the withdrawal of liquid / moisture from the slip produced in the first step. This can preferably be realized in that the slurry is in contact with a mold which extracts moisture from the slurry, as is the case, for example, with a plaster mold. At the contact surface between the slurry and the mold, the slurry may dry by moisture transfer from the slurry to the mold and thereby solidify, and in particular form a solidified layer comprising the hydrogenatable material. Dehumidification may additionally or alternatively be accelerated by heating the slip in the mold. In a further embodiment of the method according to the invention, the slip can heat automatically due to the hydrogenation of the hydrogenatable material, since this reaction (adsorption of hydrogen) is exothermic. Preferably, after the (pre-) drying / solidification of at least part of the slip, in particular a layer / layer of the slip, the remaining liquid slip is removed from the at least partially solidified or already completely solidified part of the slip. Furthermore, the mold can be freed from the solidified part of the slurry. Advantageously, the hydrogenatable material during solidification / drying or thereafter in an at least partially hydrogenated state. The moisture or liquid content to be removed may differ. Thus, this proportion may be rather low, for example less than about 13%. In the proposed method, the slurry may be introduced into the mold in various ways depending on its viscosity. Thus, a very tough slurry, which has about a liquid or water content of 0-15%, by means of pressing, a mittelzäher slip, which has about a liquid or water content of 15-25%, by means of a plastic molding and a viscous slurry, which has about a liquid or water content of about 25%, are introduced by casting into the mold.

The term hydrogen storage describes a reservoir in which hydrogen can be stored using at least one hydrogenatable element. In this case, conventional methods for storing and storing hydrogen can be used, for example compressed gas storage, such as storage in pressure vessels by compression with compressors or liquid gas storage, such as storage in liquefied form by cooling and compression. Other alternative forms of storage of hydrogen are based on solids or liquids, such as metal hydride storage, such as storage as a chemical link between hydrogen and a metal or alloy, or adsorption storage, such as adsorbed storage of hydrogen in highly porous materials. Furthermore, for storage and transport of hydrogen and hydrogen storage are possible, the hydrogen temporarily to organic substances bind, whereby liquid, pressure-less storable compounds are formed (so-called chemically bound hydrogen).

The hydrogenatable material can take up the hydrogen and release it again when needed. In a preferred embodiment, the material comprises particulate materials in any 3-dimensional configuration, such as particles, granules, fibers, preferably cut fibers, flakes and / or other geometries. In particular, the material may also be plate-shaped or powder-like. It is not necessary that the material has a uniform configuration. Rather, the design may be regular or irregular. Particles in the sense of the present invention are, for example, approximately spherical particles as well as particles with an irregular, angular outer shape. The surface may be smooth, but it is also possible that the surface of the material is rough and / or has unevenness and / or depressions and / or elevations. According to the invention, a hydrogen storage may comprise the material in only one specific 3-dimensional configuration, so that all particles of the material have the same spatial extent. However, it is also possible for a hydrogen storage to comprise the material in different configurations / geometries. By a variety of different geometries or configurations of the material, the material can be used in a variety of different hydrogen storage.

Preferably, the material comprises hollow bodies, for example particles with one or more cavities and / or with a hollow mold, for example a hollow fiber or an extrusion body with a hollow channel. The term hollow fiber describes a cylindrical fiber which has one or more continuous cavities in cross-section. By using a hollow fiber, several hollow fibers can be combined to form a hollow fiber membrane, whereby absorption and / or release of the hydrogen from the material can be facilitated due to the high porosity. The hydrogenatable material preferably has a bimodal size distribution. In this way, a higher bulk density and thus a higher density of the hydrogenatable material in the hydrogen storage can be made possible, whereby the hydrogen storage capacity, that is, the amount of hydrogen that can be stored in the memory is increased.

According to the invention, the hydrogenatable material may comprise at least one hydrogenatable metal and / or at least one hydrogenatable metal alloy, preferably consisting thereof. It may also be another hydrogen storage material, adapted for a particular purpose, providing sufficient hydrogen storage capability. Therefore, a non-metallic material as well as a mixture of different, each hydrogen-storing materials can be used. The hydrogenatable material according to the invention may comprise an even hydrogenatable material, an already hydrogenated material or else a mixture thereof.

As hydrogenatable materials can also be used:

 - alkaline earth metal and alkali metal alanates,

 - alkaline earth metal and alkali metal borohydrides,

 - Metal-Organic-Frameworks (MOF's) / Metal-Organic Frameworks, and / or

 - Clathrates,

as well as of course respective combinations of the respective materials. The material according to the invention may also comprise non-hydrogenatable metals or metal alloys.

The hydrogenatable material according to the invention may comprise a low-temperature hydride and / or a high-temperature hydride. The term hydride refers to the hydrogenatable material, regardless of whether it is present in the hydrogenated form or the non-hydrogenated form. Low-temperature hydrides store hydrogen preferably in a temperature range between -55 ° C to 180 ° C, especially between -20 ° C and 150 ° C, especially between 0 ° C and 140 ° C. High-temperature hydrides preferably store hydrogen in a temperature range from 280 ° C and more, in particular from 300 ° C and more. At the temperatures mentioned, the hydrides can not only store hydrogen but also give off, so they are functional in these temperature ranges.

If "hydrides" are described in this context, this is to be understood as meaning the hydrogenatable material in its hydrogenated form as well as in its non-hydrogenated form. Hydrogenatable materials in their hydrogenated and / or non-hydrogenated form can be used according to the invention in the production of hydrogen stores, for example as mixtures.

With regard to hydrides and their properties, reference is made to Tables 1 to 4 in S. Sakietuna et al, International Journal of Energy, 32 (2007), pp. 1121-1140 within the scope of the disclosure.

The hydrogen storage may have various layers that can perform different functions. The term layers describes that preferably one material, but also two or more materials are arranged in one layer and this can be delimited as a layer from a direct environment. For example, different materials can be arranged successively one above the other so that adjacent layers touch each other directly. In a preferred embodiment, the hydratable layer can be arranged directly adjacent to a thermally conductive layer, so that the resulting heat in the hydrogen uptake and / or release of hydrogen on the part of the hydrogenatable material can be delivered directly to the adjacent layer. The hydrogen storage (hydrogenation) can take place at room temperature. The hydrogenation is an exothermic reaction. The resulting heat of reaction can be dissipated. In contrast, dehydrogenation requires energy be supplied to the hydride in the form of heat. Dehydration is an endothermic reaction.

For example, it can be provided that a low-temperature hydride is used together with a high-temperature hydride. Thus, according to one embodiment, it can be provided that, for example, the low-temperature hydride and the high-temperature hydride are mixed in a layer of a second region. These can also be arranged separately from one another in different layers or regions, in particular also in different second regions. For example, it may be provided that a first region is arranged between these second regions. A further embodiment provides that a first region has a mixture of low and high temperature hydride distributed in the matrix. There is also the possibility that different first regions have either a low-temperature hydride or a high-temperature hydride.

Preferably, the hydrogenatable material comprises a metal selected from magnesium, titanium, iron, nickel, manganese, nickel, lanthanum, zirconium, vanadium, chromium, or a mixture of two or more of these metals. The hydrogenatable material may also comprise a metal alloy comprising at least one of said metals.

Particularly preferably, the hydrogenatable material (hydrogen storage material) comprises at least one metal alloy capable of at a temperature of 150 ° C or less, in particular in a temperature range of -20 ° C to 140 ° C, in particular from 0 ° C to 100 ° C. is to store and release hydrogen. The at least one metal alloy is preferably selected from an alloy of the AB ₅ type, the AB type and / or the AB ₂ type. Here, A and B respectively denote different metals from each other, wherein A and / or B are especially selected from the group comprising magnesium, titanium, iron, nickel, manganese, nickel, lanthanum, zirconium, vanadium and chromium. The indices represent the stoichiometric ratio of the metals in the respective alloy Alloys according to the invention may be doped with foreign atoms. The degree of doping may according to the invention up to 50 atomic%, in particular up to 40 atomic% or up to 35 atomic%, preferably up to 30 atomic% or up to 25 atomic%, especially up to 20 atomic% or until to 15 at%, preferably up to 10 at% or up to 5 at% of A and / or B. The doping can be carried out, for example, with magnesium, titanium, iron, nickel, manganese, nickel, lanthanum or other lanthanides, zirconium, vanadium and / or chromium. The doping can take place with one or more different foreign atoms. Alloys of the AB ₅ type are easily activated, that is, the conditions that are necessary for activation, similar to those in the operation of the hydrogen storage. They also have a higher ductility than alloys of the AB or AB ₂ type. By contrast, alloys of the AB ₂ or the AB type have a higher mechanical stability and hardness compared to alloys of the AB ₅ type. By way of example, mention may be made here of FeTi as the AB-type alloy, TiMn ₂ as the AB ₂ -type alloy, and LaNi ₅ as the AB ₅ -type alloy.

Particularly preferably, the hydrogenatable material (hydrogen storage material) comprises a mixture of at least two hydrogenatable alloys, wherein at least one AB ₅ -type alloy and the second alloy is an AB-type and / or AB ₂ -type alloy. The proportion of the alloy of the AB ₅ type is in particular 1 wt .-% to 50 wt .-%, in particular 2 wt .-% to 40 wt .-%, particularly preferably 5 wt .-% to 30 wt .-% and in particular 5% by weight to 20% by weight, based on the total weight of the hydrogenatable material.

The hydrogenatable material (hydrogen storage material) is preferably present in particulate form (particles, particles). In particular, the particles have a particle size x _{50 of} from 20 pm to 700 pm, preferably from 25 pm to 500 pm, especially from 30 pm to 400 pm, in particular from 50 pm to 300 pm. X ₅₀ means that 50% of the particles have a mean particle size which is equal to or less than the is called value. The particle size was determined by laser diffraction, but can also be done for example by sieve analysis. The mean particle size here is the weight-based particle size, wherein the volume-based particle size is the same here. Specified here is the particle size of the hydrogenatable material before it is subjected to hydrogenation for the first time. While the hydrogen storage stresses in the material occurs, which may cause during a plurality of cycles occurs a reduction in the particle size of x _50. Preferably, the hydrogenatable material is so firmly integrated in the matrix that it comminutes upon storage of hydrogen. Preference is therefore given to using particles as a hydrogenatable material, which breaks up, while the matrix remains at least predominantly undestroyed. This result is surprising, since it was considered that the matrix would tend to rupture when stretched by volume increase of the hydrogenatable material during storage of hydrogen when high elongation due to volume growth occurs. It is currently believed that the external forces acting on the particles from the outside as a result of the attachment in the matrix in the increase in volume together with the tensions within the particles due to the volume increase lead to a breakup. A break-up of the particles could be found particularly clearly when incorporated into polymer material in the matrix. The matrix of polymer material was able to hold the thus broken up paticles stable stationary.

Incidentally, tests have shown that, when a binder, in particular an adhesive binder, is used in the matrix for fixing these particles, a particularly good stationary positioning within the matrix is made possible. A binder content may preferably be between 2% and 3% by volume of the matrix volume.

Preferably, a change in particle size due to breakage of the particles by the storage of hydrogen by a factor of 0.6, more preferably by a factor of 0.4, based on the x ₅₀ particle size at the beginning and after 100 storage operations.

Furthermore, for example, for a matrix, a carbon matrix can be used in which the low-temperature hydride is embedded. For example, from the thesis at the University of Utrecht titled "Carbon matrix confined sodium alanate for reversible hydrogen storage" by J. Gao, available at http://dspace.library.uu.nl/handle/1874/256764, How can be matched to each other for the hydrogenatable material and the matrix to be used, so that even at lower temperatures, the hydrogen storage produced therefrom can be operated. In the context of the disclosure, reference is made to the relevant content of this document.

In a further embodiment of the method it is provided that the slurry is produced with a pulverulent, hydrogenatable metal.

A further development of the method provides that the slip is poured into a mold to create the blank and then the liquid is removed from the mold, wherein preferably the mold is a container which later serves as a hydrogen storage. Particularly advantageously, the mold is heated and the liquid contained in the blank evaporates.

Furthermore, the method can provide that one mold (or several molds in succession) is partly filled with slurry, then at least one other material is introduced into the mold, and then the respective mold, some of which is already filled with slip, is further mixed with slip is filled. In a further embodiment of the method it is provided that the blank receives a profiling on the surface during the manufacturing process, preferably by means of a comb. In addition, it is also conceivable to apply a material other than slip, for example a film, a sheet metal and / or element, which can serve for example for heat conduction, to a slip layer in order then to continue the production of the component by one or more further slip layers. Other materials can always be placed on slaked layers if necessary.

The proposed method can be carried out, for example, as an in-line process, in which a multiplicity of identical disk-shaped blanks are produced from a slurry charge from which identical components of a hydrogen storage unit in disk form are produced, the disks being arranged one above the other in the hydrogen storage space become.

Furthermore, it can be provided in the method that, in addition to the hydrogenatable metal, the slip is produced with at least one graphite material, preferably with at least one naturally expanded graphite. The hydrogenatable material may preferably be arranged in a matrix after the slurry has solidified. The term matrix describes a composite of two or more bonded materials. In this case, one material preferably takes on another. The matrix can be porous as well as closed. Preferably, the matrix is porous, preferably so porous that a flow through a hydrogen-containing fluid is possible. By the inclusion of one material by the other material, for example, material properties can complement each other, which otherwise only has the single component. Material properties and geometry of the components are important for the properties of the composites. In particular, size effects often play a role. The connection takes place, for example, by material or positive connection or a combination of both. In this way, for example, a fixed positioning of the hydrogenatable material can be made possible in the matrix. Other components of the matrix may be, for example, materials for the heat conduction and / or the gas feedthrough.

It is preferred that the matrix and / or a layer comprises a mixture of different types of carbon, including, for example, expanded natural graphite as one of the carbon species. Preference is given to using unexpanded graphite together with expanded natural graphite, using more unexpanded graphite than expanded graphite by weight. In particular, the matrix may comprise expanded natural graphite in which, for example, a hydrogenatable material is arranged.

In an advantageous embodiment of the method, a blank with the hydrogenatable metal is prepared from the slurry, wherein the blank is stored in a helical or helical form, in a wound roll, as a folded or stacked layer. In this case, the slip is advantageously poured in a helical or helical shape, in the form of a wound-up roll, or as a folded or superimposed layer. The term helical filling here describes an arrangement of the material by a filling device, which pivots its outlet opening for discharging the hydrogenatable material in a circle, so that a helical structure is formed. Furthermore, the filling device can only swing the outlet opening back and forth, so that the discharged material has a waveform. The hydrogenatable material may for example be introduced into the matrix by means of slip casting. In the context of the disclosure, reference is made to the content of DE 10 2014 006 371, from which a feed device emerges, which can also be used here for slip filling. A development of the method provides that the slip is produced with a suspended, hydrogenatable metal and with fibers, wherein the fibers of the later produced from the slurry hydrogen storage component gives a higher strength and a higher thermal conductivity.

Furthermore, a hydrogen storage production device for producing a component of a hydrogen storage is proposed, preferably a hydrogen storage component of a hydrogen storage, wherein a container is provided at least for the provision of the slurry, preferably for producing a slurry, with at least a first supply of hydrogenatable metal and with an opening through which the slurry exits for further processing.

In an advantageous embodiment of the device it is provided that the device has a die for creating blanks from the slurry and is connected to a further processing unit, in which the blanks moisture is removed and components of the hydrogen storage are formed.

Furthermore, it can be provided that the container is provided with at least one second supply of graphite. It can also be provided that the further processing unit subsequently follows a station for assembling the components into a hydrogen storage. In a special development it is provided that a supply of prefabricated material is provided for the arrangement between the components. It can also be provided that a profiling station is provided for profiling at least one surface of the component.

It may also be provided that the hydrogen storage device has components in the form of a core-shell structure, in which the core comprises a first material and the shell comprises a second material different therefrom, wherein the first material and / or the second material is a hydrogen-containing material. having chernding material. For example, this is preferably provided in the layers of the composite material. An embodiment provides that the second material of the shell comprises a polymer, which is at least designed hydrogen-permeable. A further embodiment provides that the core has a heat-conducting material and the jacket a hydrogen-storing material. Again, it can be provided that the core has a primary hydrogen-storing material and the jacket is a primary heat-conducting material, wherein the heat-conductive material is hydrogen-permeable. Furthermore, a hydrogen storage element is proposed, preferably produced by a process according to one of claims 1 to 15, in particular preferably produced by a device according to any one of claims 11 to 14, comprising at least one hydrogen-permeable body, preferably containing a porous body made of a slip casting a hydrogenatable material, and preferably a thermally conductive material, wherein the element is for use in a hydrogen storage.

An advantageous embodiment of the hydrogen storage element provides that at least one surface of the element has a surface profiling. A further embodiment of the hydrogen storage element provides that the element is arranged in a container of a hydrogen storage, wherein the element forms the hydrogen storage at least partially.

Furthermore, it can be provided that the hydrogen storage element in the container helical, wound structure and / or several elements are stacked.

A specific embodiment provides that the first hydrogenatable material is a low-temperature hydride and the hydrogen storage element comprises a second hydrogenatable material which is a high-temperature hydride.

The term hydrogen storage material describes a material that has hydrogen storage capability. In this case, this material may be present before and / or during the processing according to the invention in the hydrogenated or at least partially non-hydrogenated state. Insofar as "hydrogenatable" is mentioned in the foregoing or following, this should not be understood as limiting insofar as this term can in principle also mean the hydrogenated state of the hydrogen storage element. According to the invention, the hydrogenatable or hydrogenated particles (eg of metal or metal hydride) are always suspended in a viscous mass in the solid state. This also applies to any additives such. For example, particles of thermally conductive material (eg of graphite and / or of metal particles, fibers, etc., for example of aluminum). The viscous mass may comprise a polymer which thermosets. However, it is also conceivable that the extrudate solidifies by evaporation of a material component, wherein an open porosity for the gas conductivity can arise. Alternatively, it is also possible that the extrudate by a reaction of different reaction components (such as epoxy or the like resins) solidifies.

Furthermore, it is advantageous if the slurry body is surrounded by a protective layer which protects it from oxidation during the production of the hydride storage tank until it is put into operation.

Further advantageous embodiments as well as features will become apparent from the following figures and the associated description. The resulting from the figures and the description of individual features are exemplary only and not limited to the particular embodiment. Rather, one or more features of the figures may be combined with other features of the above description to further embodiments. Therefore, the features are not limiting but exemplified. It shows:

Fig. 1

 a mold 1, which is filled with a slurry 2, which has a hydrogenatable material 3, in particular a hydrogenatable metal, and

Fig. 2

an example of a strip casting from Schlicker. Fig. 1 shows a mold 1 which is filled with a slurry 2, comprising a hydrogenatable material 3, in particular a hydrogenatable metal. The slip 2 has a liquid fraction before the production of a blank (see at 4). During the production of the blank, the mold 1 absorbs the liquid 4 at least in the region 5 adjoining the mold 1, which is marked with a dashed line in FIG. 1, so that the slurry 2 solidifies in this region 5. The liquid 4 may be, for example, in addition to water, an organic solvent, in particular when using a polymer in the hydrogenatable material 3 to be soaked. The solidification can be accelerated by supplying heat from the mold 1 to the slurry 2. For this purpose, the mold 1 can be provided with an integrated (eg electrically operated) heater or be heated from outside (eg by radiant heat or convection). Also, the solidification can be accelerated by hydrogenating the hydrogenatable material 3. Hydrogenation, ie. the hydrogen uptake of the hydrogenatable material 3 can be realized by supplying hydrogen 6 through channels 7 arranged in the mold 1. After solidification, a portion 8 of the slurry 2 preferably remains liquid, which is poured out of the mold. The slip 2 according to this embodiment, moreover, a polymer which forms a support structure. The polymer is used in addition to the protection against oxidation of the hydrogenatable material, especially the cohesion of the particles of the hydrogenatable material, which arise when using the solidified slip as a hydrogen storage component. Because the hydrogenatable material expands (and also warms) in the hydrogen uptake, which in the course of time can lead to cracking and thus to individual fragments (particles), which is advantageous insofar as the surface of the hydrogenatable material of the component increased, which can thus store more and possibly faster hydrogen.

Because of its binder (or adhesive) effect, the polymer material prevents the onset of cracking from causing mechanical breakdown of the hydrogen storage component. Rather, what remains of the frozen Cker formed with hydrogenatable material component (in, for example, disc, block, tablet or pellet form) during their further use as a hydrogen storage element substantially dimensionally stable. Fig. Figure 2 shows schematically that the slurry 2 can be poured onto a conveyor belt 10 to form a slip belt. Depending on the consistency and nature of the slurry, it can also be processed as a multi-component slip casting in ribbon form. The Schlickergussband would then have several layers one above the other or side by side, which would flow out of the reservoir 12 in the manner of a laminar flow.

The features of individual embodiments of the invention are exemplified below grouped again, the features of individual groups can be combined with each other and with features of the embodiments described above, embodiments and variants of the invention, by adding or omitting individual features. 1. A process for producing a hydrogen-storing component of a hydrogen storage device comprising the following steps: a) preparing a slip comprising a hydrogenatable material, in particular a hydrogenatable metal, b) preparing a blank, preferably a layer, from the slip containing the hydrogenatable material, c) Remove liquid from the blank and make

hydrogen-storing component from the blank, d) use of the component in a hydrogen storage. Method according to item 1, characterized in that the slurry is produced with a pulverulent, hydrogenatable metal.

A method according to item 1 or 2, characterized in that the slurry is poured into a mold for the preparation of the blank and then the liquid is removed from the mold, wherein preferably the mold is a container which later serves as a closed hydrogen storage.

Process according to item 3, characterized in that the mold is heated and the liquid contained in the blank evaporates.

Method according to one of the preceding figures, characterized in that at least one mold is partially filled with slurry, then at least one other material is introduced into the mold and then the partially filled with slurry mold is further filled with slurry.

Method according to one of the preceding figures, characterized in that the blank receives a profiling on the surface during the manufacturing process, preferably by means of a comb.

Method according to one of the preceding figures, characterized in that the production proceeds as an in-line process, wherein a plurality of identical disc-shaped blanks are produced from a slurry charge from which identical components of a hydrogen storage are produced in disc form, the discs in the Hydrogen storage are arranged one above the other superimposed.

Method according to one of the preceding figures, characterized in that in addition to the hydrogenatable metal, the slip with at least one a graphite material is produced, preferably with at least one naturally expanded graphite.

Method according to one of the preceding figures, characterized in that a blank with the hydrogenatable metal is produced from the slurry, wherein the blank is deposited in a helical or helical form, in a wound roll, as a folded or superimposed layer.

Method according to one of the preceding figures, characterized in that the slurry is produced with a suspended, hydrogenatable metal and with fibers, wherein the fibers of the later produced from the slurry hydrogen storage component gives a higher strength and a higher thermal conductivity.

Apparatus for producing a component of a hydrogen storage, preferably a hydrogen storage component of a hydrogen storage, wherein a container is provided at least for providing the slurry, preferably for producing a slurry, with at least a first supply of hydrogenatable metal and with an opening through which the slurry exits for further processing.

Device according to item 11, characterized in that the device has a die for creating blanks from the slurry and is connected to a further processing unit in which the blanks moisture is removed and components of the hydrogen storage are formed. 13. The device according to item 11 or 12, characterized in that the container is provided with at least a second supply of graphite. Device according to item 11, 12 or 13, characterized in that the further processing unit subsequently follows a station for assembling the components into a hydrogen storage. Device according to one of the numbers 11 to 14, characterized in that a supply of prefabricated material is provided for the arrangement between the components. Device according to one of the preceding figures, characterized in that a Profilierstation is provided for profiling of at least one surface of the component. Component, preferably produced by a process according to any one of items 1 to 10, in particular preferably produced by a device according to any one of items 11 to 16, comprising at least one porous body made of a slip casting containing a first hydrogenatable material and preferably a thermally conductive material, wherein the component is intended for use in a hydrogen storage. Component according to item 17, characterized in that at least one surface of the component has a surface profiling. Component according to one of the numbers 17 or 18, arranged in a container of a hydrogen storage, wherein the component forms the hydrogen storage at least partially. Component according to one of the preceding paragraphs 17 to 19, characterized in that the component in the container helical, wound structure and / or several components are stacked. Component according to any of the items 17 to 20, characterized in that the first hydrogenatable material is a low temperature hydride and the component comprises a second hydrogenatable material which is a high temperature hydride.

Claims

A process for producing a hydrogen storage element for a hydrogen storage, wherein in the process  Slip is provided, which has a hydrogen storage material,  the slurry is introduced into a mold,  the slurry is deprived of moisture to produce a body and  the hydrogen storage element is made from the body. A method according to claim 1, characterized in that a hydrogenatable material, preferably a hydrogenatable metal, in particular a hydrogenatable metal alloy is selected as hydrogen storage material and that preferably the hydrogen storage material is a powder and / or in the form of fibers, flakes or the like. is present. Method according to one of claims 1 or 2, characterized in that the mold is a container and that the dried in the container slurry is used together with the container in the closed state as a hydrogen storage module. Method according to one of claims 1 to 3, characterized in that the removal of moisture from the slurry is supported by a form of a moisture-absorbing and possibly to the environment donating material, such. B. gypsum, by drying by means of dehumidified air and / or by heating the mold and / or the slip actively by means of a heat source or by self-heating due to heat of reaction resulting from hydrogenation. Method according to one of claims 1 to 4, characterized in that the slurry is introduced into a form having an inner side, that the slurry in its bordering on the inside of the mold. In the vicinity of the edge of the mold, it dries, and the still-dried slurry in the middle region within the mold is removed from the latter, leaving dry drips on the inside of the mold. Method according to one of claims 1 to 5, characterized in that the slurry further comprises a binder, in particular a polymer, for binding hydrogen storage material of the slurry when it is dried. Method according to one of claims 1 to 6, characterized in that the dried slurry contains a surface profiling, in particular by means of a stamping tool such. As a squeegee, a profiling role or the like. Method according to one of claims 1 to 7, characterized in that at least one further material layer with heat-conducting and / or gas-conducting properties is applied to a layer of slurry, optionally of at least dried or drier slip. A method according to claim 8, characterized in that material of the at least one further material layer or material of at least one of the further material layers in the flowable state is applied to the slip layer, preferably the dried or drier slip layer and dried thereon. Method according to one of claims 1 to 9, characterized in that the slurry further comprises a heat conductive material such. B. graphite, in particular expanded and preferably naturally expanded graphite, wherein expanded graphite particles are aligned to reduce the volume of the slurry. 11. The method according to any one of claims 1 to 10, characterized in that the slurry is provided to increase the given in the dried state mechanical strength and / or to increase the thermal conductivity with fibers. 12. The method according to any one of claims 1 to 11, characterized in that from the z. B. in strip casting or cast as a belt mold dried slurry by processing a blank, preferably in disc, block, plate, tablet, pellet or the like. Mold is made. 13. The method according to any one of claims 1 to 12, characterized in that dried slurry is compacted. 14. The method according to any one of claims 1 to 13, characterized in that slip is prepared with at least one internally dried layer in helix or helical form, in the form of a wound into a roll band or folded or superimposed layers. 15. The method according to any one of claims 12 to 14, characterized in that the slurry is pre-dried for processing as a blank and that the blank is dried further. 16. The method according to any one of claims 1 to 15, characterized in that the hydrogen storage material comprises a low-temperature and / or a high-temperature hydride. 17. Hydrogen storage manufacturing apparatus for producing a hydrogen storage element with a container for at least receiving a slip with hydrogen storage material, preferably hydrogenatable metal or hydrogenatable metal alloy. 18. Hydrogen storage manufacturing apparatus according to claim 17, characterized by a drying unit, in particular heating, for drying the slurry on the container wall. Hydrogen storage production device according to one of claims 17 or 18, characterized by a die for the production of blanks from pre-dried slurry, wherein the blanks are optionally further dried. 20. Hydrogen storage manufacturing apparatus according to any one of claims 17 to 19, characterized by a feed unit for supplying graphite. Hydrogen storage production device according to one of claims 17 to 20, characterized by a feed unit for supplying in particular heat-conducting or in particular gas-carrying intrinsically stable material in strand, block, plate, disc or belt form for arrangement in contact and / or mechanical connection with a blank. Hydrogen storage production device according to one of claims 17 to 21, characterized by a profiling unit for profiling at least a portion of the surface of a blank. A hydrogen storage element, preferably made by a method according to any one of claims 1 to 15 or preferably made with a device according to any one of claims 17 to 22, comprising at least one porous body made of a slip casting containing a first hydrogen storage material and preferably a heat conducting material, said element intended for use in a hydrogen storage. 24. Hydrogen storage element according to claim 23, characterized in that at least one surface of the element has a Oberflächenprofile tion. 25. A hydrogen storage element according to any one of claims 23 or 24, arranged in a container of a hydrogen storage, wherein the element forms at least a portion of the hydrogen storage. 26. A hydrogen storage element according to any one of claims 23 to 25, characterized in that the first hydrogen storage material is a low temperature hydride and the element comprises a second hydrogen storage material which is a high temperature hydride.