Solid hydrogen storage device and preparation method thereof

Abstract

The invention discloses a solid hydrogen storage device and a preparation method thereof. The solid hydrogen storage device comprises a tank body and a hydrogen storage element arranged in the tank body, the hydrogen storage element comprises a diffusion layer, a hydrogen storage layer and a heat conduction layer; the hydrogen storage element is in a roll shape, and the hydrogen storage layer is located between the diffusion layer and the heat conduction layer. The core part of the hydrogen storage element is a diffusion layer, and the outer surface of the hydrogen storage element is a heat conduction layer; the diffusion layer is formed by one or more materials selected from the following materials: foamed nickel, foamed aluminum, a copper net and an aluminum net; the hydrogen storage layer comprises a hydrogen storage material; the hydrogen storage material is selected from one or more of a rare earth hydrogen storage alloy, a titanium hydrogen storage alloy, a magnesium hydrogen storage alloy, a vanadium-based solid solution, a coordination hydride, a metal nitrogen hydride and a carbon hydrogen storage material; the heat conduction layer is formed by one or more materials selected from aluminum foil, copper foil, nickel foil, an aluminum net, a copper net, a nickel net and a steel belt. The solid hydrogen storage device has a relatively high hydrogen desorption rate.

Description

Technical Field

[0001] The invention relates to a solid-state hydrogen storage device and a preparation method thereof. Background Art

[0002] The storage and transportation of hydrogen energy impact its widespread application. Solid-state hydrogen storage offers advantages such as safety, high volumetric hydrogen storage density, high hydrogen release purity, and suitability for long-term storage. Solid-state hydrogen storage is a highly promising form of hydrogen storage and has attracted considerable attention. However, the hydrogen storage alloys used in solid-state hydrogen storage technology can experience localized accumulation during the charging and discharging process, leading to stress concentration in the hydrogen storage tank.

[0003] CN111720725A discloses a solid-state hydrogen storage tank, comprising a tank body, a hydrogen storage bed element, an air duct, a filter and a valve. A plurality of hydrogen storage bed elements are stacked inside the tank body, and a longitudinal through hole is provided on the hydrogen storage bed element, and the air duct is placed in the through hole. Each hydrogen storage bed element comprises a hydrogen storage material layer, a heat-conducting layer and a flexible wrapping layer. The heat-conducting layer and the hydrogen storage material layer are alternately stacked, and the flexible wrapping layer includes the heat-conducting layer and the hydrogen storage material layer therein. The hydrogen storage material is any one or a mixture of several of titanium AB2 type and AB type, rare earth AB3 and AB5 type, titanium vanadium solid solution, magnesium-based hydrogen storage alloy, complex hydride, metal nitrogen hydride, and ammonia borane. The heat-conducting layer is a metal mesh, a metal foil or a metal sheet, and the flexible wrapping layer is a metal mesh or a metal foil. The hydrogen release rate of the device is relatively slow.

[0004] CN117515409A discloses a solid-state hydrogen storage bottle, comprising a main tank body and an air duct. An inner liner is provided inside the main tank body, and a shock-absorbing device is provided on the circumferential side of the main tank body; a plurality of hydrogen storage units are provided inside the inner liner, and a fixed disk is vertically provided at both ends of the inner liner in the height direction, and the fixed disk is located outside the inner liner, and an opening is provided on the circumferential side of the inner liner. The hydrogen storage unit includes a copper mesh for wrapping the hydrogen storage material, and copper foil is provided at both ends of the copper mesh in the length direction, and the copper foil is used to separate adjacent hydrogen storage units. One end of the air duct is connected to the hydrogen storage unit, and the other end of the air duct passes through the main tank body and is connected to the hydrogen charging and discharging unit. The hydrogen discharge rate of this solid-state hydrogen storage bottle is relatively slow. Summary of the Invention

[0005] In view of this, one object of the present invention is to provide a solid-state hydrogen storage device having a high hydrogen release rate. Furthermore, the solid-state hydrogen storage device has good stability. Another object of the present invention is to provide a method for preparing a solid hydrogen storage device.

[0006] In one aspect, the present invention provides a solid-state hydrogen storage device comprising a tank body and a hydrogen storage element disposed in the tank body;

[0007] The hydrogen storage element comprises a diffusion layer, a hydrogen storage layer and a heat-conducting layer; the hydrogen storage element is in a roll shape, and the hydrogen storage layer is located between the diffusion layer and the heat-conducting layer; the core of the hydrogen storage element is the diffusion layer, and the outer surface of the hydrogen storage element is the heat-conducting layer;

[0008] The diffusion layer is formed of one or more materials selected from the group consisting of foamed nickel, foamed aluminum, copper mesh, and aluminum mesh;

[0009] The hydrogen storage layer includes a hydrogen storage material; the hydrogen storage material is selected from one or more of rare earth hydrogen storage alloys, titanium hydrogen storage alloys, magnesium hydrogen storage alloys, vanadium-based solid solutions, coordinated hydrides, metal nitrogen hydrides, and carbon hydrogen storage materials;

[0010] The heat conductive layer is formed of one or more materials selected from the group consisting of aluminum foil, copper foil, nickel foil, aluminum mesh, copper mesh, nickel mesh, and steel tape.

[0011] According to the hydrogen storage device of the present invention, preferably, in the hydrogen storage element, the diffusion layer is in contact with the heat conductive layer.

[0012] According to the hydrogen storage device of the present invention, preferably, in the hydrogen storage element, the diffusion layer and the heat conductive layer are not in contact with each other.

[0013] According to the hydrogen storage device of the present invention, preferably, the hydrogen storage element is formed by winding an object to be wound;

[0014] The object to be wound comprises a diffusion layer, a hydrogen storage layer and a heat conducting layer which are sequentially arranged from top to bottom.

[0015] According to the hydrogen storage device of the present invention, preferably, the hydrogen storage element is formed by winding an object to be wound;

[0016] One end of the object to be wound is a bent end, and the other end is a free end; the middle part and the free end of the object to be wound include a heat-conducting layer A, a hydrogen storage layer A, a diffusion layer, a hydrogen storage layer B and a heat-conducting layer B arranged in sequence from top to bottom; the bent end of the object to be wound includes a heat-conducting layer located on the outside and a hydrogen storage layer located on the inside; the two ends of the heat-conducting layer at the bent end are respectively connected to the heat-conducting layer A and the heat-conducting layer B, and the two ends of the hydrogen storage layer at the bent end are respectively connected to the hydrogen storage layer A and the hydrogen storage layer B.

[0017] According to the hydrogen storage device of the present invention, preferably, the hydrogen storage layer further comprises a binder, and the binder is selected from one or more of silicone rubber, silicone resin, polytetrafluoroethylene, and epoxy resin;

[0018] The mass ratio of hydrogen storage material to binder is (6-13):1.

[0019] According to the hydrogen storage device of the present invention, preferably, the diffusion layer has a thickness of 0.5 to 2.5 mm, and the heat conductive layer has a thickness of 0.05 to 0.6 mm.

[0020] According to the hydrogen storage device of the present invention, preferably, the hydrogen storage element is naturally loose in the tank body, and the heat conductive layer is naturally attached to the inner wall of the tank body;

[0021] The inner diameter of the tank body is greater than or equal to 30 cm.

[0022] In another aspect, the present invention provides a method for preparing the above-mentioned solid-state hydrogen storage device, comprising the following steps:

[0023] (1) coating a hydrogen storage slurry containing a hydrogen storage material and a binder on the surface of the heat conductive layer, and then drying to obtain an intermediate having a hydrogen storage layer and a heat conductive layer;

[0024] (2) folding the intermediate body in half so that the hydrogen storage layers are adjacent to each other and the heat conductive layer is on the outer surface; then placing the diffusion layer between the adjacent hydrogen storage layers to obtain the object to be wound;

[0025] (3) Winding the object to be wound to form a hydrogen storage element;

[0026] (4) Placing the hydrogen storage element in the tank to obtain a solid-state hydrogen storage device.

[0027] In another aspect, the present invention provides a method for preparing the above-mentioned solid-state hydrogen storage device, comprising the following steps:

[0028] (1) coating a hydrogen storage slurry containing a hydrogen storage material and a binder on the surface of the heat conductive layer, and then drying to obtain an intermediate having a hydrogen storage layer and a heat conductive layer;

[0029] (2) covering the hydrogen storage layer of the intermediate body with the diffusion layer to obtain the object to be wound;

[0030] (3) Winding the object to be wound to form a hydrogen storage element;

[0031] (4) Placing the hydrogen storage element in the tank to obtain a solid-state hydrogen storage device.

[0032] The solid-state hydrogen storage device of the present invention has excellent heat transfer performance and a large number of hydrogen diffusion channels, which improves the hydrogen release rate of the solid-state hydrogen storage device. Furthermore, the solid-state hydrogen storage device of the present invention has good stability and can maintain a high hydrogen release rate even after long-term use. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 Schematic diagram of the structure of the objects to be wound in Examples 1 to 6. The arrows in the figure indicate the winding direction.

[0034] Figure 2 Schematic diagrams of the structures of the objects to be wound in Examples 7 to 13. The arrows in the figures indicate the winding directions.

[0035] The reference numerals are as follows:

[0036] 1-heat conducting layer; 2-hydrogen storage layer; 3-diffusion layer; 101-heat conducting layer A; 102-heat conducting layer B; 201-hydrogen storage layer A; 202-hydrogen storage layer B. DETAILED DESCRIPTION

[0037] The present invention will be further described below with reference to specific embodiments, but the protection scope of the present invention is not limited thereto.

[0038] <Solid-state hydrogen storage device>

[0039] The solid-state hydrogen storage device of the present invention comprises a tank body and a hydrogen storage element.

[0040] tank

[0041] The can body of the present invention may be cylindrical.

[0042] The inner diameter of the tank body can be greater than or equal to 30 cm. Preferably, the inner diameter of the tank body is 5 to 80 cm. In some embodiments, the inner diameter of the tank body is 35 to 45 cm. In other embodiments, the inner diameter of the tank body is 50 to 70 cm.

[0043] Hydrogen storage elements

[0044] The hydrogen storage element of the present invention is placed in the tank.

[0045] The hydrogen storage element of the present invention comprises a diffusion layer, a hydrogen storage layer, and a heat-conducting layer. The hydrogen storage element is in a roll shape. The hydrogen storage layer is located between the diffusion layer and the heat-conducting layer. The core of the hydrogen storage element is the diffusion layer, and the outer surface of the hydrogen storage element is the heat-conducting layer.

[0046] The hydrogen storage element is naturally loose in the tank, and the heat conductive layer is naturally attached to the inner wall of the tank.

[0047] The diffusion layer is formed from one or more materials selected from the group consisting of nickel foam, aluminum foam, copper mesh, and aluminum mesh. In certain embodiments, the diffusion layer is formed from nickel foam. The porosity of the nickel foam may be 60-85% by weight, preferably 65-75% by weight. In other embodiments, the diffusion layer is formed from copper mesh. The pore size of the copper mesh may be 0.3-3 mm, preferably 0.5-2 mm, and more preferably 0.8-1.5 mm.

[0048] The thickness of the diffusion layer can be 0.5 to 2.5 mm, preferably 1 to 2 mm. In certain embodiments, the thickness of the diffusion layer is 1.5 to 1.7 mm. In other embodiments, the thickness of the diffusion layer is 1 to 1.2 mm. The diffusion layer can be stacked in multiple layers to achieve the desired thickness.

[0049] The hydrogen storage layer includes a hydrogen storage material and, in certain embodiments, further includes a binder.

[0050] The hydrogen storage material can be selected from one or more of rare earth hydrogen storage alloys, titanium hydrogen storage alloys, magnesium hydrogen storage alloys, vanadium-based solid solutions, coordination hydrides, metal nitrogen hydrides, and carbon hydrogen storage materials. In certain embodiments, the hydrogen storage material is a rare earth hydrogen storage alloy. Preferably, the rare earth hydrogen storage alloy is LaNi5. In other embodiments, the hydrogen storage material is a titanium hydrogen storage alloy. Preferably, the titanium hydrogen storage alloy may include titanium, zirconium, chromium, and manganese. The titanium hydrogen storage alloy may have the following elemental composition:

[0051] Ti a Zr b Cr c Mn d

[0052] Wherein, a, b, c, and d represent the atomic fraction or molar fraction of each element respectively.

[0053] 0.5≤a≤1.2; preferably, 0.7≤a≤1; more preferably, 0.8≤a≤0.9.

[0054] 0.05≤b≤0.5; preferably, 0.1≤b≤0.4; more preferably, 0.2≤b≤0.3.

[0055] 0.4≤c≤1.3; preferably, 0.6≤c≤1; more preferably, 0.7≤c≤0.8.

[0056] 0.8≤d≤1.7; preferably, 1≤d≤1.5; more preferably, 1.2≤d≤1.3.

[0057] According to one embodiment of the present invention, the titanium-based hydrogen storage alloy has the following elemental composition:

[0058] Ti 0.8 Zr 0.2 Cr 0.7 Mn 1.3

[0059] The hydrogen storage material can be used in the form of powder. The particle size of the hydrogen storage material D 50 It may be 0.05 to 5 mm, preferably 0.08 to 1 mm, and more preferably 0.1 to 0.3 mm.

[0060] The amount of the hydrogen storage material used can be 1000-10000% of the mass of the heat conductive layer; preferably 3000-10000%; more preferably 5000-7000%.

[0061] The binder can be selected from one or more of silicone rubber, silicone resin, polytetrafluoroethylene, and epoxy resin. In certain embodiments, the binder is silicone rubber. Preferably, the silicone rubber is a two-component addition silicone rubber. In other embodiments, the binder is polytetrafluoroethylene. In still other embodiments, the binder is Kraft K706.

[0062] The mass ratio of the hydrogen storage material to the binder may be (6-13):1; preferably (8-11):1; more preferably (9-10):1.

[0063] The thermally conductive layer of the present invention is formed from one or more materials selected from the group consisting of aluminum foil, copper foil, nickel foil, aluminum mesh, copper mesh, nickel mesh, and steel strip. In certain embodiments, the thermally conductive layer is formed from aluminum foil. In other embodiments, the thermally conductive layer is formed from copper foil.

[0064] The thickness of the thermal conductive layer may be 0.05 to 0.6 mm, preferably 0.1 to 0.3 mm. In some embodiments, the thickness of the thermal conductive layer is 0.15 to 0.2 mm. In other embodiments, the thickness of the thermal conductive layer is 0.3 to 0.35 mm.

[0065] In certain embodiments, in the hydrogen storage element, the diffusion layer is in contact with the thermally conductive layer.

[0066] The hydrogen storage element is formed by winding a material to be wound. The material to be wound includes a diffusion layer, a hydrogen storage layer, and a heat conduction layer arranged in sequence from top to bottom. Both ends of the material to be wound are free ends.

[0067] In other embodiments, in the hydrogen storage element, the diffusion layer is not in contact with the heat conductive layer.

[0068] The hydrogen storage element is formed by winding an object to be wound. One end of the object to be wound is a bent end, and the other end of the object to be wound is a free end. The outer surface of the object to be wound is a heat-conducting layer. The hydrogen storage layer is attached to the inner surface of the heat-conducting layer. A diffusion layer is provided between the hydrogen storage layers. That is, the middle part and the free end of the object to be wound include a heat-conducting layer A, a hydrogen storage layer A, a diffusion layer, a hydrogen storage layer B and a heat-conducting layer B arranged in sequence from top to bottom. The bent end of the object to be wound includes a heat-conducting layer located on the outside and a hydrogen storage layer located on the inside. The two ends of the heat-conducting layer at the bent end are respectively connected to the heat-conducting layer A and the heat-conducting layer B. The two ends of the hydrogen storage layer at the bent end are respectively connected to the hydrogen storage layer A and the hydrogen storage layer B.

[0069] The heat conducting layer A and the heat conducting layer B both represent heat conducting layers, but are distinguished by A and B due to their different locations. The hydrogen storage layer A and the hydrogen storage layer B both represent hydrogen storage layers, but are distinguished by A and B due to their different locations.

[0070] <Method for preparing a solid-state hydrogen storage device>

[0071] The preparation method of the solid-state hydrogen storage device of the present invention comprises the following steps: (1) preparing an intermediate; (2) preparing an object to be wound; (3) winding; and (4) assembling a hydrogen storage element and a tank body.

[0072] Steps for preparing intermediates

[0073] The invention coats hydrogen storage slurry containing hydrogen storage material and binder on the surface of the heat conducting layer and then dries the slurry to obtain an intermediate having the hydrogen storage layer and the heat conducting layer.

[0074] The thermally conductive layer may be rectangular or square. The length of the thermally conductive layer may be 10 to 150 cm. In certain embodiments, the length of the thermally conductive layer is 20 to 40 cm. In other embodiments, the length of the thermally conductive layer is 90 to 120 cm. The width of the thermally conductive layer may be 10 to 70 cm. In certain embodiments, the width of the thermally conductive layer is 20 to 40 cm. In other embodiments, the width of the thermally conductive layer is 40 to 60 cm.

[0075] The drying temperature may be 20 to 100°C, preferably 30 to 80°C, and more preferably 50 to 60°C.

[0076] The drying time may be 30 to 1000 min, preferably 60 to 500 min, and more preferably 80 to 150 min.

[0077] Steps for preparing the material to be wound

[0078] In certain embodiments, the intermediate body is folded in half so that the hydrogen storage layers are adjacent to each other and the heat conductive layer is on the outer surface; the diffusion layer is then placed between the adjacent hydrogen storage layers to obtain the winding object. The area of ​​the diffusion layer is half that of the heat conductive layer.

[0079] In other embodiments, a diffusion layer is covered on the hydrogen storage layer of the intermediate body to obtain a to-be-wound object. The shape of the diffusion layer is the same as that of the heat-conducting layer.

[0080] Winding steps

[0081] The present invention winds the object to be wound to form a hydrogen storage element.

[0082] In certain embodiments, the object to be wound is wound with its bent end as an axis to form a hydrogen storage element.

[0083] In other embodiments, the object to be wound is taken as an axis at one end and wound from the end toward the other end of the object to be wound to form a hydrogen storage element.

[0084] Steps for assembling the hydrogen storage element and the tank

[0085] The present invention places a hydrogen storage element in a tank body to obtain a solid-state hydrogen storage device.

[0086] Here is the test method:

[0087] Test method for hydrogen release rate:

[0088] (1) Hydrogen charging stage: A 40L / 15MPa hydrogen cylinder is used as the gas source, and the output pressure is controlled by a pressure reducing valve. The hydrogen storage element of the solid-state hydrogen storage device is completely filled with hydrogen at a hydrogen pressure of 5MPa to achieve the same initial state.

[0089] (2) Hydrogen desorption stage: After the hydrogen charging is completed and the temperature of the solid-state hydrogen storage device is stabilized, the hydrogen desorption performance is tested at 50°C. The hydrogen desorption cut-off pressure is 0.1 MPa, and the hydrogen desorption rate (SLM) data is recorded by a hydrogen mass flow meter.

[0090] (3) Cyclic hydrogen charging and dehydrogenation: Repeat steps (1) and (2) multiple times to perform cyclic hydrogen charging and dehydrogenation, and record the hydrogen dehydrogenation rate (SLM) data using a hydrogen mass flow meter.

[0091] Examples 1 to 6

[0092] The diffusion layer raw material was cut into sheets of 30 cm×15 cm to obtain a diffusion layer.

[0093] The heat conductive layer raw material was cut into sheets of 30 cm×30 cm to obtain a heat conductive layer.

[0094] The hydrogen storage material and the binder were mixed at a mass ratio of 9:1 to obtain a hydrogen storage slurry. The hydrogen storage slurry was evenly coated on the surface of the thermal conductive layer and then dried at 50°C for 120 minutes to obtain an intermediate having a hydrogen storage layer and a thermal conductive layer.

[0095] The intermediate body is folded in half so that the hydrogen storage layers are close to each other and the heat conductive layer is on the outer surface; then the diffusion layer is placed between the hydrogen storage layers close to each other to obtain the object to be wound.

[0096] like Figure 1 As shown, one end of the object to be wound is a curved end, and the other end is a free end. The middle portion and free end of the object to be wound comprise, from top to bottom, a heat-conducting layer A 101, a hydrogen storage layer A 201, a diffusion layer 3, a hydrogen storage layer B 202, and a heat-conducting layer B 102. The curved end of the object to be wound comprises an outer heat-conducting layer 1 and an inner hydrogen storage layer 2. The ends of the heat-conducting layer 1 at the curved end are connected to the heat-conducting layer A 101 and the heat-conducting layer B 102, respectively. The ends of the hydrogen storage layer 2 at the curved end are connected to the hydrogen storage layer A 201 and the hydrogen storage layer B 202, respectively.

[0097] The object to be wound is wound with its bent end as the axis to form a hydrogen storage element.

[0098] The hydrogen storage element is placed in a cylindrical tank with an inner diameter of 40 cm (pressure rating of 10 MPa) to obtain a solid-state hydrogen storage device. The hydrogen storage element is naturally loose in the tank, and the heat conductive layer naturally adheres to the inner wall of the tank.

[0099] The selection of various raw materials and hydrogen release rates are shown in Table 1.

[0100] Table 1

[0101]

[0102] Examples 7 to 13

[0103] The diffusion layer raw material was cut into sheets of 100 cm×50 cm to obtain a diffusion layer.

[0104] The heat conductive layer raw material was cut into sheets of 100 cm×50 cm to obtain a heat conductive layer.

[0105] The hydrogen storage material and the binder were mixed at a mass ratio of 9:1 to obtain a hydrogen storage slurry. The hydrogen storage slurry was evenly coated on the surface of the thermal conductive layer and then dried at 50°C for 120 minutes to obtain an intermediate having a hydrogen storage layer and a thermal conductive layer.

[0106] The diffusion layer is covered on the hydrogen storage layer of the intermediate body to obtain the object to be wound.

[0107] like Figure 2 As shown, both ends of the object to be wound are free ends. The object to be wound includes a diffusion layer 3, a hydrogen storage layer 2 and a heat conducting layer 1 arranged in sequence from top to bottom.

[0108] The object to be wound is wound with one end as the axis and wound from the end toward the other end to form a hydrogen storage element. The outer surface of the hydrogen storage element is a heat conductive layer, and the core is a diffusion layer.

[0109] The hydrogen storage element is placed in a cylindrical tank with an inner diameter of 60 cm (pressure rating of 10 MPa) to obtain a solid-state hydrogen storage device. The hydrogen storage element is naturally loose in the tank, and the heat conductive layer naturally adheres to the inner wall of the tank.

[0110] The selection of each raw material and the hydrogen release rate are shown in Table 2.

[0111] Table 2

[0112]

[0113] The present invention is not limited to the above-mentioned embodiments. Any modification, improvement, or substitution that can be conceived by those skilled in the art without departing from the essential content of the present invention shall fall within the scope of the present invention.

Claims

1. A solid-state hydrogen storage device, characterized in that: The solid-state hydrogen storage device includes a tank body and a hydrogen storage element placed in the tank body; The hydrogen storage element comprises a diffusion layer, a hydrogen storage layer and a heat-conducting layer; the hydrogen storage element is in a roll shape, and the hydrogen storage layer is located between the diffusion layer and the heat-conducting layer; the core of the hydrogen storage element is the diffusion layer, and the outer surface of the hydrogen storage element is the heat-conducting layer; The diffusion layer is formed of one or more materials selected from the group consisting of foamed nickel, foamed aluminum, copper mesh, and aluminum mesh; The hydrogen storage layer includes a hydrogen storage material; the hydrogen storage material is selected from one or more of rare earth hydrogen storage alloys, titanium hydrogen storage alloys, magnesium hydrogen storage alloys, vanadium-based solid solutions, coordinated hydrides, metal nitrogen hydrides, and carbon hydrogen storage materials; The heat conductive layer is formed of one or more materials selected from the group consisting of aluminum foil, copper foil, nickel foil, aluminum mesh, copper mesh, nickel mesh, and steel tape.

2. The hydrogen storage device according to claim 1, characterized in that In the hydrogen storage element, the diffusion layer is in contact with the heat conducting layer.

3. The hydrogen storage device according to claim 1, characterized in that In the hydrogen storage element, the diffusion layer and the heat conducting layer are not in contact with each other.

4. The hydrogen storage device according to claim 2, characterized in that The hydrogen storage element is formed by winding the object to be wound; The object to be wound comprises a diffusion layer, a hydrogen storage layer and a heat conducting layer which are sequentially arranged from top to bottom.

5. The hydrogen storage device according to claim 3, characterized in that The hydrogen storage element is formed by winding the object to be wound; One end of the object to be wound is a bent end, and the other end is a free end; the middle part and the free end of the object to be wound include a heat-conducting layer A, a hydrogen storage layer A, a diffusion layer, a hydrogen storage layer B and a heat-conducting layer B arranged in sequence from top to bottom; the bent end of the object to be wound includes a heat-conducting layer located on the outside and a hydrogen storage layer located on the inside; the two ends of the heat-conducting layer at the bent end are respectively connected to the heat-conducting layer A and the heat-conducting layer B, and the two ends of the hydrogen storage layer at the bent end are respectively connected to the hydrogen storage layer A and the hydrogen storage layer B.

6. The solid-state hydrogen storage device according to claim 1, characterized in that: The hydrogen storage layer further comprises a binder, and the binder is selected from one or more of silicone rubber, silicone resin, polytetrafluoroethylene, and epoxy resin; The mass ratio of hydrogen storage material to binder is (6-13):

1.

7. The solid-state hydrogen storage device according to claim 1, characterized in that: The thickness of the diffusion layer is 0.5-2.5 mm, and the thickness of the heat conduction layer is 0.05-0.6 mm.

8. The solid-state hydrogen storage device according to claim 1, characterized in that: The hydrogen storage element is naturally loose in the tank body, and the heat conductive layer is naturally attached to the inner wall of the tank body; The inner diameter of the tank body is greater than or equal to 30 cm.

9. The method for preparing a solid-state hydrogen storage device according to claim 1, wherein: The steps include: (1) coating a hydrogen storage slurry containing a hydrogen storage material and a binder on the surface of the heat conductive layer, and then drying to obtain an intermediate having a hydrogen storage layer and a heat conductive layer; (2) folding the intermediate body in half so that the hydrogen storage layers are adjacent to each other and the heat conducting layer is on the outer surface; Then, the diffusion layer is placed between the hydrogen storage layers close to each other to obtain the object to be wound; (3) Winding the object to be wound to form a hydrogen storage element; (4) Placing the hydrogen storage element in the tank to obtain a solid-state hydrogen storage device.

10. The method for preparing a solid-state hydrogen storage device according to claim 1, wherein: The steps include: (1) coating a hydrogen storage slurry containing a hydrogen storage material and a binder on the surface of the heat conductive layer, and then drying to obtain an intermediate having a hydrogen storage layer and a heat conductive layer; (2) covering the hydrogen storage layer of the intermediate body with the diffusion layer to obtain the object to be wound; (3) Winding the object to be wound to form a hydrogen storage element; (4) Placing the hydrogen storage element in the tank to obtain a solid-state hydrogen storage device.

Images