Composite hydrogen storage device and fuel cell

Abstract

The invention discloses a composite hydrogen storage device and a fuel cell. The composite hydrogen storage device comprises a first reaction chamber and a second reaction chamber, the first reaction chamber is arranged in the second reaction chamber, the first reaction chamber is used for preparing hydrogen through a hydrolysis reaction, and the second reaction chamber is used for preparing hydrogen or storing hydrogen through an endothermic reaction. The first reaction chamber and the second reaction chamber are respectively used for being connected with a fuel cell. The fuel cell comprises the composite hydrogen storage device. The first reaction chamber and the second reaction chamber of the composite hydrogen storage device are respectively connected with a fuel cell so as to provide a hydrogen source for the fuel cell. According to the composite hydrogen storage device, a hydrogen storage or hydrogen production mode, such as organic liquid hydrogen storage, methanol reforming hydrogen production, solid hydrogen storage and the like, which can only react after heat absorption is set, so that heat released by hydrolysis reaction in the first reaction chamber is recycled, the energy utilization efficiency is improved, and meanwhile, the hydrogen storage density of the system is improved.

Description

Technical Field

[0001] The present application relates to the field of energy technology, and in particular to a composite hydrogen storage device and a fuel cell. Background Art

[0002] Hydrogen-oxygen fuel cells use hydrogen as fuel and oxygen as oxidant, and directly convert the chemical energy of the fuel into electrical energy through electrochemical reactions. They are not limited by the Carnot cycle, have high energy conversion efficiency, and their reaction product is only water, which is green and efficient. Fuel cells are suitable as the power system of UUV (Underwater Unmanned Vehicle). Compared with lithium-ion power systems, they have the advantages of high power density, long cruising range, and light weight. Compared with gas engine power systems, they have the advantages of low vibration and noise, and almost no tail exhaust.

[0003] At present, the hydrogen supply method of fuel cell UUV is mainly based on simple hydrogen bottles. To improve the endurance of fuel cell UUV, it is necessary to increase the volume of the hydrogen storage bottle. However, the larger the pressure and volume specifications of the hydrogen storage bottle, the higher the safety risk level. For hydrogen fuel, it can be achieved by hydrolysis. The hydrolysis materials for hydrogen production include aluminum, lithium aluminum tetrahydride, sodium borohydride, etc. The hydrolysis reaction of the hydrolysis material usually releases a large amount of heat. At present, this part of the heat is dissipated through the radiator, which will cause energy waste. The volume of the radiator is also usually large, which reduces the hydrogen storage density of the system in disguise; even if mechanical methods are used to recover heat, the mechanical recovery efficiency is low and the energy utilization rate is limited. Summary of the invention

[0004] Based on this, it is necessary to provide a composite hydrogen storage device. The composite hydrogen storage device of the present invention can improve the efficiency of energy utilization and at the same time improve the hydrogen storage density of the system.

[0005] An embodiment of the present application provides a composite hydrogen storage device.

[0006] A composite hydrogen storage device includes a first reaction chamber and a second reaction chamber, wherein the first reaction chamber is arranged inside the second reaction chamber, the first reaction chamber is used to prepare hydrogen through a hydrolysis reaction, and the second reaction chamber is used to prepare hydrogen or store hydrogen through an endothermic reaction, and the first reaction chamber and the second reaction chamber are respectively used to connect to a fuel cell.

[0007] In some embodiments, the first reaction chamber is wrapped with a shell on the outside, and there is a gap between the shell and the outer wall of the first reaction chamber, and the gap between the shell and the first reaction chamber forms the second reaction chamber.

[0008] In some embodiments, the composite hydrogen storage device further includes a water storage tank, which is connected to the first reaction chamber via a water supply pipe, and is used to supply water to the first reaction chamber.

[0009] In some of the embodiments, the composite hydrogen storage device further includes a delivery pump, which is disposed on a water supply pipeline and is used to supply water to the first reaction chamber through the water supply pipeline.

[0010] In some embodiments, the composite hydrogen storage device further includes a gas-liquid separator, which is connected to the gas outlet of the first reaction chamber, and is used to perform gas-liquid separation on water vapor and / or hydrogen from the gas outlet of the first reaction chamber.

[0011] In some embodiments, the gas-liquid separator is also used to connect to a fuel cell, and the gas after gas-liquid separation by the gas-liquid separator enters the fuel cell.

[0012] In some embodiments, a feed control baffle is provided at the feed inlet of the first reaction chamber, and the feed control baffle is movably connected to the first reaction chamber. The feed control baffle can control the size of the feed inlet of the first reaction chamber to achieve control of the feed amount.

[0013] In some embodiments, the first reaction chamber is loaded with a hydrolysis hydrogen production material, and the hydrolysis hydrogen production material includes one or more of active metal materials, silicon-based composite materials, metal hydride materials, and borohydride materials.

[0014] In some embodiments, the second reaction chamber is loaded with a reforming reaction catalyst for catalyzing a methanol reforming reaction, so as to enable the second reaction chamber to perform a methanol reforming hydrogen production reaction;

[0015] The second reaction chamber is used to connect to a fuel cell, and a purification device is provided on the pipeline between the second reaction chamber and the fuel cell.

[0016] In some embodiments, the second reaction chamber is connected to a methanol storage box, and the methanol storage box is used to input methanol aqueous solution into the second reaction chamber.

[0017] In some embodiments, the second reaction chamber is loaded with a liquid hydrogen storage releasing catalyst capable of catalyzing the release of hydrogen from organic liquid hydrogen storage, so that the second reaction chamber uses organic liquid hydrogen storage to release hydrogen.

[0018] In some embodiments, the liquid hydrogen storage release catalyst includes one or both of a platinum-based catalyst and a nickel-based catalyst.

[0019] The second reaction chamber is connected to a hydrogen storage material storage box, and the hydrogen storage material storage box is used to input organic liquid hydrogen storage material into the second reaction chamber.

[0020] The organic liquid hydrogen storage material includes one or more of benzene, toluene, xylene, carbazole and nitrogen ethyl carbazole.

[0021] In some embodiments, the second reaction chamber is loaded with a solid hydrogen storage alloy material, and the second reaction chamber is also connected to a water storage tank;

[0022] The second reaction chamber is capable of heating the solid hydrogen storage alloy material to release hydrogen gas through the exothermic heat of the hydrolysis reaction in the first reaction chamber.

[0023] In some embodiments, the solid hydrogen storage alloy material includes one or more of lanthanum nickel series, iron titanium series and magnesium hydride.

[0024] In some embodiments, the second reaction chamber is also connected to a gas-liquid separator, which is used to separate the hydrogen generated in the second reaction chamber into gas and liquid, and collect the separated water into a water storage tank, and send the separated hydrogen into the fuel cell.

[0025] An embodiment of the present application also provides a fuel cell.

[0026] A fuel cell comprises the composite hydrogen storage device, wherein the first reaction chamber and the second reaction chamber of the composite hydrogen storage device are respectively connected to a fuel cell to provide a hydrogen source for the fuel cell.

[0027] The above-mentioned composite hydrogen storage device is provided with a hydrogen storage or hydrogen production method that requires heat absorption to react, such as organic liquid hydrogen storage, methanol reforming hydrogen production, solid hydrogen storage, etc., to achieve the reuse of the heat released by the hydrolysis reaction in the first reaction chamber, improve energy utilization efficiency, and at the same time increase the hydrogen storage density of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative work.

[0029] In order to more completely understand the present application and its beneficial effects, the following description will be given in conjunction with the accompanying drawings. In the following description, the same reference numerals represent the same parts.

[0030] Figure 1 This is a schematic diagram of a composite hydrogen storage device according to an embodiment of the present invention.

[0031] Description of Reference Numerals

[0032] 10. Composite hydrogen storage device; 100. First reaction chamber; 200. Second reaction chamber; 300. Water storage tank; 400. Delivery pump; 500. Gas-liquid separator; 600. Purification device; 700. Hydrogen storage material storage tank; 20. Fuel cell. DETAILED DESCRIPTION

[0033] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0034] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0035] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0037] In the description of the present invention, "several" means more than one, "many" means more than two, "greater than", "less than", "exceed", etc. are understood to exclude the number itself, and "above", "below", "within", etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0038] In this article, "optionally", "optional", "optional" means optional, that is, it means to be selected from any of the two parallel solutions of "yes" or "no". If there are multiple "optional" in a technical solution, unless otherwise specified and there is no contradiction or mutual restriction, each "optional" is independent. In this application, the descriptions such as "optionally contain" and "optionally include" mean "contain or not contain".

[0039] In the present application, when it comes to a numerical interval (i.e., a numerical range), unless otherwise specified, the distribution of the optional numerical values ​​in the numerical interval is considered to be continuous, and includes the two numerical endpoints (i.e., the minimum and maximum values) of the numerical interval, and each numerical value between the two numerical endpoints. Unless otherwise specified, when the numerical interval only refers to an integer in the numerical interval, it includes the two endpoint integers of the numerical range, and each integer between the two endpoints, which is equivalent to directly listing each integer. When multiple numerical ranges are provided to describe features or characteristics, these numerical ranges can be combined. In other words, unless otherwise specified, the numerical range disclosed in the present application should be understood to include any and all sub-ranges included therein. The "numerical value" in the numerical interval can be any quantitative value, such as a number, a percentage, a ratio, etc. "Numerical interval" allows for a broad range of quantitative intervals such as percentage intervals, ratio intervals, and ratio intervals.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0041] The present application provides a composite hydrogen storage device to solve at least one of the following problems in the prior art when producing hydrogen: (1) the hydrolysis reaction of the hydrolysis material releases a large amount of heat which is dissipated through the radiator, resulting in energy waste; (2) the radiator is usually large in size, which reduces the hydrogen storage density of the system in disguise; (3) the mechanical method of heat recovery has the problem of low recovery efficiency and limited improvement in energy utilization. The composite hydrogen storage device will be described below in conjunction with the accompanying drawings.

[0042] The composite hydrogen storage device 10 provided in the embodiment of the present application is exemplary, see Figure 1 As shown, Figure 1 This is a schematic diagram of the structure of a composite hydrogen storage device 10 provided in an embodiment of the present application. The composite hydrogen storage device 10 of the present application can be used for hydrogen storage.

[0043] In order to more clearly illustrate the structure of the composite hydrogen storage device 10 , the composite hydrogen storage device 10 will be introduced below with reference to the accompanying drawings.

[0044] For example, see Figure 1 As shown, a composite hydrogen storage device 10 includes a first reaction chamber 100 and a second reaction chamber 200. The first reaction chamber 100 is disposed in the second reaction chamber 200. The first reaction chamber 100 is used to prepare hydrogen through a hydrolysis reaction. The second reaction chamber 200 is used to prepare hydrogen or store hydrogen through an endothermic reaction. The first reaction chamber 100 and the second reaction chamber 200 are respectively used to connect to a fuel cell 20.

[0045] In some embodiments, the first reaction chamber 100 is wrapped with a shell. There is a gap between the shell and the outer wall of the first reaction chamber 100. The gap between the shell and the first reaction chamber 100 forms the second reaction chamber 200. The gap between the shell and the outer wall of the first reaction chamber 100 can be adjusted as needed to achieve that the chamber volume of the second reaction chamber 200 meets actual needs.

[0046] In some embodiments, the composite hydrogen storage device 10 further includes a water storage tank 300. The water storage tank 300 is connected to the first reaction chamber 100 through a water supply pipe. The water storage tank 300 is used to supply water to the first reaction chamber 100. The volume of the water storage tank 300 can be set as needed.

[0047] In some embodiments, the composite hydrogen storage device 10 further includes a delivery pump 400. The delivery pump 400 is disposed on a water supply pipeline and is used to supply water to the first reaction chamber 100 through the water supply pipeline.

[0048] In some embodiments, the composite hydrogen storage device 10 further includes a gas-liquid separator 500. The gas-liquid separator 500 is connected to the gas outlet of the first reaction chamber 100. The gas-liquid separator 500 is used to separate the water vapor and / or hydrogen from the gas outlet of the first reaction chamber 100 into gas and liquid.

[0049] In some embodiments, the gas-liquid separator 500 is also used to connect to the fuel cell 20. The gas after gas-liquid separation in the gas-liquid separator 500 enters the fuel cell 20.

[0050] In some embodiments, a feed control baffle is provided at the feed inlet of the first reaction chamber 100. The feed control baffle is movably connected to the first reaction chamber 100. The feed control baffle can control the size of the feed inlet of the first reaction chamber 100 to achieve control of the feed amount. The feed control baffle is not shown in the drawings.

[0051] In some embodiments, the first reaction chamber 100 is loaded with a hydrolysis hydrogen production material. The hydrolysis reaction refers to a chemical reaction between the hydrolysis hydrogen production material and water to produce hydrogen.

[0052] In some embodiments, the hydrolysis hydrogen production material includes: one or more of active metal materials, silicon-based composite materials, metal hydride materials, and borohydride materials. Among them, the active metals mainly include the following: potassium (K), calcium (Ca), sodium (Na), magnesium (Mg), aluminum (Al), zinc (Zn), iron (Fe), tin (Sn), etc. Metal materials can mainly include aluminum-based composite materials and magnesium-based composite materials. Metal hydride materials mainly include magnesium hydride, lithium aluminum tetrahydride, calcium hydride, etc. Borohydride materials mainly include: sodium borohydride, potassium borohydride, lithium borohydride, magnesium borohydride, ammonia borane, etc.

[0053] In some embodiments, the second reaction chamber 200 is loaded with a reforming reaction catalyst for catalyzing a methanol reforming reaction, so as to realize a methanol reforming hydrogen production reaction in the second reaction chamber 200. The second reaction chamber 200 is used to connect the fuel cell 20, and a purification device 600 is provided on the pipeline between the second reaction chamber 200 and the fuel cell 20.

[0054] In some embodiments, the second reaction chamber 200 is connected to a methanol storage tank. The methanol storage tank is used to input methanol aqueous solution into the second reaction chamber 200. A delivery pump 400 is also provided on the pipeline between the methanol storage tank and the second reaction chamber 200. The volume of the methanol storage tank can be set as needed.

[0055] Methanol reforming is an important chemical process for producing hydrogen from methanol and water vapor. This process is mainly based on the following chemical reactions:

[0056] Methanol cracking reaction: CH3OH→CO+2H2-90.7 kJ / mol;

[0057] Water-gas shift reaction (also called shift reaction): H2O+CO→CO2+H2+41.2 kJ / mol;

[0058] Methanol steam reforming reaction: CH3OH+H2O→CO2+3H2-49.5 kJ / mol.

[0059] In practical applications, methanol reacts with water vapor under specific temperature (usually between 250°C and 300°C) and pressure (about 1 to 5 MPa) conditions through a suitable reforming reaction catalyst. The selection of reforming reaction catalysts is crucial to improving reaction efficiency and selectivity. Commonly used reforming reaction catalysts include copper-based catalysts. During the entire reforming reaction, methanol is first cracked, followed by the shift reaction of carbon monoxide and water vapor, and finally hydrogen and carbon dioxide are generated. In addition to hydrogen and carbon dioxide, the generated gas mixture may also contain a small amount of other impurities, such as methane or sulfide. In order to obtain high-purity hydrogen, the gas mixture also needs to undergo subsequent purification treatment, such as pressure swing adsorption (PSA) and other technologies, to remove these impurities. Methanol reforming hydrogen production technology is considered to be a hydrogen production method with broad application prospects due to its advantages such as a wide source of raw materials, low cost, environmental friendliness, and convenient storage and transportation, especially in promoting hydrogen energy and achieving carbon neutrality goals.

[0060] In some of the embodiments, the second reaction chamber 200 is loaded with a liquid hydrogen storage releasing catalyst capable of catalyzing the release of hydrogen from organic liquid hydrogen storage, so that the second reaction chamber 200 uses organic liquid hydrogen storage to release hydrogen.

[0061] In some embodiments, the liquid hydrogen storage release catalyst includes one or both of a platinum-based catalyst and a nickel-based catalyst. The second reaction chamber 200 is connected to a hydrogen storage material storage box 700 , which is used to input organic liquid hydrogen storage material into the second reaction chamber 200 .

[0062] Liquid Organic Hydrogen Carriers (LOHCs) is a technology that uses specific organic compounds to reversibly convert between hydrogenation and dehydrogenation reactions to store and release hydrogen. Organic liquid hydrogen storage materials are usually some unsaturated organic compounds, such as certain alkenes, alkynes or aromatic hydrocarbons, which can store hydrogen in the form of chemical bonds in the molecular structure through hydrogenation reactions to form stable hydrides; when hydrogen is needed, it is released through dehydrogenation reactions.

[0063] In some embodiments, the organic liquid hydrogen storage material includes one or more of benzene, toluene, xylene, carbazole and nitrogen ethyl carbazole.

[0064] In some embodiments, the second reaction chamber 200 is loaded with a solid hydrogen storage alloy material, and the second reaction chamber 200 is also connected to a water storage tank. The second reaction chamber 200 can heat the solid hydrogen storage alloy material to release hydrogen through the exothermic heat of the hydrolysis reaction in the first reaction chamber 100.

[0065] Solid-state hydrogen storage alloy materials are materials that can absorb and release hydrogen and are mainly used to store hydrogen safely and efficiently. Such materials are usually composed of metals or alloys that can undergo a reversible chemical reaction with hydrogen under certain temperature and pressure conditions to form metal hydrides. When hydrogen needs to be released, it is only necessary to change the temperature or pressure conditions. Characteristics of solid-state hydrogen storage alloy materials: (1) High safety: Compared with high-pressure gaseous or low-temperature liquid hydrogen storage, solid-state hydrogen storage is safer because hydrogen is fixed inside the material and will not release a large amount of hydrogen immediately even if the container is damaged. (2) High hydrogen storage density: The hydrogen storage density of some solid-state hydrogen storage materials can reach a high level, which is conducive to improving the energy density of the hydrogen storage system. (3) Reversibility: Solid-state hydrogen storage materials can be repeatedly charged and discharged under certain conditions and have good cycle stability. (4) Strong environmental adaptability: Suitable for use in a variety of environments, especially in applications with strict requirements on safety and volume.

[0066] Common solid-state hydrogen storage alloy materials Rare earth hydrogen storage materials: such as LaNi5 (lanthanum nickel five alloy), the hydrogen storage density of this type of material is generally between 1.4% and 1.8%, and hydrogen can be charged and discharged at room temperature, and commercial applications have been achieved. Titanium hydrogen storage materials: such as TiMn2 (titanium manganese alloy), also have the ability to charge and discharge hydrogen at room temperature, and the hydrogen storage density is similar to that of rare earth series. Magnesium-based hydrogen storage materials: such as MgH2 (magnesium hydride), the hydrogen storage density of this material can reach up to 7.6%, but it needs to be effectively charged and discharged at a high temperature of more than 300°C. It has the advantages of high hydrogen storage capacity and abundant resources and low cost. Composite hydrogen storage materials: In order to improve the performance of a single material, such as increasing the hydrogen storage rate and reducing the operating temperature, researchers have also developed a variety of composite hydrogen storage materials, such as adding catalysts to magnesium-based materials or mixing them with other materials.

[0067] In some embodiments, the solid hydrogen storage alloy material includes one or more of lanthanum nickel series, iron titanium series and magnesium hydride.

[0068] In some of the embodiments, a gas-liquid separator 500 is also connected to the second reaction chamber 200 , and the gas-liquid separator 500 performs gas-liquid separation on the hydrogen generated in the second reaction chamber 200 , collects the separated condensed water into a water storage tank, and the separated hydrogen enters the fuel cell 20 .

[0069] In some of the embodiments, it should be noted that the first reaction chamber 100 and the second reaction chamber 200 may share a gas-liquid separator 500 , or may have separate gas-liquid separators 500 .

[0070] An embodiment of the present application further provides a fuel cell 20 .

[0071] A fuel cell 20 includes the composite hydrogen storage device 10 . The first reaction chamber 100 and the second reaction chamber 200 of the composite hydrogen storage device 10 are respectively connected to the fuel cell 20 to provide a hydrogen source for the fuel cell 20 .

[0072] In summary, the above-mentioned composite hydrogen storage device 10 is provided with a hydrogen storage or hydrogen production method that requires heat absorption to react, such as organic liquid hydrogen storage, methanol reforming hydrogen production, solid hydrogen storage, etc., to achieve the reuse of the heat released by the hydrolysis reaction in the first reaction chamber 100, improve energy utilization efficiency, and at the same time improve the system hydrogen storage density.

[0073] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0074] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0075] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A composite hydrogen storage device, characterized in that: It includes a first reaction chamber and a second reaction chamber, the first reaction chamber is arranged in the second reaction chamber, the first reaction chamber is used to prepare hydrogen through a hydrolysis reaction, the second reaction chamber is used to prepare hydrogen through an endothermic reaction or store hydrogen, and the first reaction chamber and the second reaction chamber are respectively used to connect to a fuel cell.

2. The composite hydrogen storage device according to claim 1, characterized in that: The first reaction chamber is wrapped with a shell on the outside, and there is a gap between the shell and the outer wall of the first reaction chamber. The gap between the shell and the first reaction chamber forms the second reaction chamber.

3. The composite hydrogen storage device according to claim 1, characterized in that: The composite hydrogen storage device further includes a water storage tank body, which is connected to the first reaction chamber via a water supply pipeline, and is used to supply water to the first reaction chamber.

4. The composite hydrogen storage device according to claim 3, characterized in that: The composite hydrogen storage device further includes a delivery pump, which is disposed on a water supply pipeline and is used to supply water to the first reaction chamber through the water supply pipeline.

5. The composite hydrogen storage device according to claim 1, characterized in that: The composite hydrogen storage device further includes a gas-liquid separator, which is connected to the gas outlet of the first reaction chamber and is used for performing gas-liquid separation on water vapor and / or hydrogen from the gas outlet of the first reaction chamber.

6. The composite hydrogen storage device according to claim 5, characterized in that: The gas-liquid separator is also used to connect to a fuel cell, and the gas after gas-liquid separation by the gas-liquid separator enters the fuel cell.

7. The composite hydrogen storage device according to any one of claims 1 to 6, characterized in that: A feed control baffle is provided at the feed inlet of the first reaction chamber, and the feed control baffle is movably connected to the first reaction chamber. The feed control baffle can control the size of the feed inlet of the first reaction chamber to achieve control of the feed amount.

8. The composite hydrogen storage device according to any one of claims 1 to 6, characterized in that: The first reaction chamber is loaded with a hydrolysis hydrogen production material, and the hydrolysis hydrogen production material includes one or more of active metal materials, silicon-based composite materials, metal hydride materials, and borohydride materials.

9. The composite hydrogen storage device according to any one of claims 1 to 6, characterized in that: The second reaction chamber is loaded with a reforming reaction catalyst for catalyzing a methanol reforming reaction, so as to enable the second reaction chamber to perform a methanol reforming hydrogen production reaction; The second reaction chamber is used to connect to a fuel cell, and a purification device is provided on the pipeline between the second reaction chamber and the fuel cell; Alternatively, the second reaction chamber is loaded with a liquid hydrogen storage release catalyst capable of catalyzing the release of hydrogen from organic liquid hydrogen storage, so that the second reaction chamber uses organic liquid hydrogen storage to release hydrogen; Alternatively, the second reaction chamber is loaded with a solid hydrogen storage alloy material, and the second reaction chamber is also connected to a water storage tank; the second reaction chamber can heat the solid hydrogen storage alloy material to release hydrogen through the exothermic heat of the hydrolysis reaction in the first reaction chamber.

10. A fuel cell, characterized in that: The composite hydrogen storage device comprises the composite hydrogen storage device according to any one of claims 1 to 9, wherein the first reaction chamber and the second reaction chamber of the composite hydrogen storage device are respectively connected to a fuel cell to provide a hydrogen source for the fuel cell.

Images