An all-solid-state fuel cell based on hydrogen production by sodium borohydride hydrolysis

Abstract

The present invention discloses a fully solid fuel cell for producing hydrogen by hydrolyzing sodium borohydride, which has a reasonable structure, a compact size, high efficiency, good safety, and is clean and environmentally friendly. The fuel cell comprises a hydrogen generator, a heat pipe channel, and a power generation unit; the hydrogen generator contains a solid mixture of hydrogen produced by hydrolyzing sodium borohydride; the power generation unit comprises an anode cavity and a power generation unit cover plate connected by tension, and an anode flow channel plate, a first plate-type solid oxide fuel cell, a multi-stage composite unit, and a cathode flow channel plate, which are stacked and pressed from bottom to top in sequence between the anode cavity and the power generation unit cover plate; the composite unit comprises a composite flow channel plate and a second plate-type solid oxide fuel cell, which are stacked and pressed in sequence from bottom to top; an anode flow channel and an anode terminal are arranged on the anode flow channel plate, and a first anode gas diffusion port is respectively connected to the anode flow channel and the anode cavity; a cathode flow channel and a cathode terminal are arranged on the cathode flow channel plate, and a first air inlet and outlet are connected to the cathode flow channel.

Description

Technical Field

[0001] The invention relates to the technical field of fuel cells, in particular to an all-solid-state fuel cell based on producing hydrogen by hydrolysis of sodium borohydride. Background Art

[0002] The power supply system based on the combustion of traditional fuels is the main cause of the increasingly serious global air pollution. With the sharp increase in fossil fuel consumption, hydrogen energy has attracted more and more attention. Among them, solid oxide fuel cells are a kind of high-efficiency battery that can use hydrogen as fuel, and have important application prospects in the energy field.

[0003] Most existing hydrogen fuel cells are supplied with hydrogen through high-pressure hydrogen storage bottles, which are not easy to carry. The fuel sources of small mobile power sources are more diverse. Among the many hydrogen storage materials, sodium borohydride (NaBH4) is considered to be a promising hydrogen storage material because of its theoretical hydrogen storage capacity of 10.8wt.%, high controllability of hydrolysis, and mild conditions.

[0004] In the prior art, the reactants in portable hydrolysis hydrogen production devices are generally liquid borohydrides, which have the risk of leakage and poor safety. In the hydrolysis of solid borohydrides to produce hydrogen, the hydrolysis rate is generally controlled by controlling the amount of water added, which is difficult to achieve full solid state, affecting the application and promotion of fuel cells, and unable to meet the requirements of fuel cells for volume, efficiency and safety. Summary of the invention

[0005] In view of the problems existing in the prior art, the present invention provides an all-solid-state fuel cell based on sodium borohydride hydrolysis to produce hydrogen, which has a reasonable structure, a small size, high efficiency, good safety, and is clean and environmentally friendly.

[0006] The present invention is achieved through the following technical solutions:

[0007] An all-solid-state fuel cell based on sodium borohydride hydrolysis to produce hydrogen, comprising a hydrogen generator, a heat pipe channel and a power generation unit;

[0008] The hydrogen generator contains a mixture of solid sodium borohydride hydrolyzed to produce hydrogen;

[0009] The power generation unit comprises an anode cavity and a power generation unit cover plate which are tightly connected, and an anode flow channel plate, a first plate-type solid oxide fuel cell, a multi-stage composite unit and a cathode flow channel plate which are sequentially stacked and pressed from bottom to top between the anode cavity and the power generation unit cover plate; the composite unit comprises a composite flow channel plate and a second plate-type solid oxide fuel cell which are sequentially stacked and pressed from bottom to top;

[0010] The anode channel plate is provided with an anode channel and an anode terminal, and a first anode gas diffusion port which is respectively connected with the anode channel and the anode cavity;

[0011] The cathode flow channel plate is provided with a cathode flow channel and a cathode terminal, as well as a first air inlet and outlet communicated with the cathode flow channel;

[0012] Flow channels are arranged on both sides of the composite flow channel plate, the flow channel on one side close to the cathode flow channel plate is connected to the first anode gas diffusion port, and the flow channel on the other side is connected to the first air inlet and outlet;

[0013] The evaporation end of the heat pipe channel is connected to the inside of the anode cavity for heat conduction, and the condensation end is connected to the inside of the hydrogen generator for heat conduction.

[0014] Optionally, it also includes a shell and a heating rod, wherein the shell includes an outer shell and a shell cover plate connected to an opening of the shell, and the heating rod passes through the shell and is arranged inside the shell.

[0015] Optionally, a channel opening is set on the shell corresponding to the heat pipe channel, an anode wiring opening is set corresponding to the anode wiring terminal, a cathode wiring opening is set corresponding to the cathode wiring terminal, and a heating rod interface is set corresponding to the heating rod.

[0016] Optionally, the anode cavity is a groove-shaped cavity, the opening of the anode cavity is sealed and connected to the anode flow channel plate, and the interior of the anode cavity is sealed and connected to the first anode gas diffusion port;

[0017] A second anode gas diffusion port and a second air inlet and outlet are respectively arranged on both sides of the composite flow channel plate. The flow channel on one side close to the cathode flow channel plate is sealed and connected with the first anode gas diffusion port through the second anode gas diffusion port, and the flow channel on the other side is sealed and connected with the first air inlet and outlet through the second air inlet and outlet.

[0018] Optionally, the flow channels on both sides of the composite flow channel plate are arranged symmetrically on both sides, and the second anode gas diffusion port and the second air inlet and outlet are respectively diagonally distributed.

[0019] The cathode flow channel plate is a single-sided structure, and the first air inlet and outlet are diagonally distributed;

[0020] The anode channel plate is a single-sided structure, and the first anode gas diffusion ports are diagonally distributed.

[0021] Optionally, the heat pipe channel includes a coaxially arranged tube shell and tube wall, an air supply channel is formed in the tube wall, and a liquid absorbent core is arranged between the tube shell and the tube wall; the liquid absorbent core is made of an insulating capillary porous material, a cavity area is arranged in the center and is filled with saturated heat exchange medium.

[0022] Optionally, the hydrogen generator is cylindrical in shape, with one end open and sealed by a matching hydrogen generator cover.

[0023] Optionally, the hydrogen generator is arranged horizontally, and a plurality of heat pipe channels are arranged in sequence along the busbar direction.

[0024] Optionally, the mixture for producing hydrogen by hydrolysis of sodium borohydride comprises sodium borohydride powder, a sodium borohydride hydrolysis catalyst and a salt crystal hydrate.

[0025] Optionally, the salt crystal hydrate uses Na2SO4·10H2O as a water source for the hydrogen production reaction, and the mass ratio of sodium borohydride powder to Na2SO4·10H2O is 1:5.

[0026] Compared with the prior art, the present invention has the following beneficial technical effects:

[0027] The invention discloses a fully solid-state fuel cell based on the production of hydrogen by hydrolysis of sodium borohydride. The hydrogen required by the anode of the fuel cell is generated by a set hydrogen generator, and the hydrogen is diffused to the anode of the first plate-type solid oxide fuel cell and the second plate-type solid oxide fuel cell through the anode cavity of the heat pipe channel, the anode flow channel plate, and the anode part of the composite flow channel plate in sequence. When the plate-type solid oxide fuel cell generates electricity, the gaseous water generated on the anode side diffuses into the anode cavity in turn, and enters the hydrogen generator after exchanging heat with the outside through the heat pipe channel to drive the NaBH4 powder in the hydrogen generator to continue to hydrolyze and generate hydrogen, forming a complete closed loop. The number of units that meet the requirements can be increased according to different needs to adjust the energy supply. The overall structure of the power generation unit is compactly arranged to be connected to the hydrogen generator through the heat pipe channel that can exchange heat and serves as a connecting pipeline, and the size is small and the structure is compact. In the above cycle, when the plate-type solid oxide fuel cell generates electricity, the number of moles of water molecules generated at the anode is equal to the number of moles of hydrogen supplied to the anode, the energy density is high, and the energy supply is environmentally friendly and clean. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 An exploded view of the structure described in the example of the present invention;

[0029] Figure 2 is a cross-sectional view of the structure described in the example of the present invention;

[0030] Figure 3a It is a schematic diagram of the structure of the heat pipe channel in the example of the present invention;

[0031] Figure 3b is a cross-sectional view of the heat pipe channel in an example of the present invention;

[0032] Figure 4 is a schematic structural diagram of the composite flow channel plate in an example of the present invention;

[0033] Figure 5 is a schematic structural diagram of the cathode flow channel plate in an example of the present invention;

[0034] Figure 6 It is a structural schematic diagram of the anode flow channel plate in an example of the present invention;

[0035] Figure 7 It is a schematic diagram of the structure of the shell described in the example of the present invention.

[0036] Among them, 1 is a hydrogen generator, 2 is a heat pipe channel, 3 is a first plate-type solid oxide fuel cell, 4 is a second plate-type solid oxide fuel cell, 5 is a composite flow channel plate, 6 is a cathode flow channel plate, 7 is an anode flow channel plate, 8 is an anode cavity, 9 is a power generation unit cover plate, 10 is a hydrogen generator cover plate, 11 is a heating rod, 12 is a shell, 13 is a shell cover plate, 201 is a gas supply channel, 202 is a liquid absorption core, 203 is a cavity area, 501 is a second anode gas diffusion port, 502 is a second air inlet and outlet, 503 is a composite flow channel plate channel, 601 is a first air inlet and outlet, 602 is a cathode flow channel, 603 is a cathode terminal, 701 is a first anode gas diffusion port, 702 is an anode flow channel, 703 is an anode terminal, a channel port 1201, an anode terminal port 1202, a cathode terminal port 1203, and a heating rod interface 1204. DETAILED DESCRIPTION

[0037] The present invention is further described in detail below in conjunction with specific embodiments, which are intended to explain the present invention rather than to limit it.

[0038] The core of the present invention is to design the mechanical structure of the all-solid-state fuel cell. In the specific operation of the all-solid-state fuel cell based on the hydrolysis of sodium borohydride to produce hydrogen, the hydrogen produced by the hydrolysis reaction of the NaBH4 powder in the mixture of the hydrolysis of sodium borohydride to produce hydrogen in the hydrogen generator is diffused to the anode of the first plate-type solid oxide fuel cell and the second plate-type solid oxide fuel cell through the anode cavity 8, the anode flow channel 702, and the anode part of the composite flow channel plate 5. The gaseous water generated on the anode side when the plate-type solid oxide fuel cell generates electricity is in turn diffused and collected in the anode cavity 8, and enters the hydrogen generator 1 after passing through the heat pipe channel 2 and exchanging heat with the outside world to drive the NaBH4 powder in the hydrogen generator to hydrolyze and produce hydrogen. In the above cycle, the number of moles of water molecules generated at the anode when the plate-type solid oxide fuel cell generates electricity is equal to the number of moles of hydrogen supplied to the anode.

[0039] Specifically, this preferred embodiment is described by taking a one-stage composite unit as an example. When a multi-stage composite unit is used, the above structure is sequentially stacked, and the gas communication structure is the same as the communication structure of the single-stage composite unit.

[0040] like Figure 1 and Figure 2As shown, the present invention is an all-solid-state fuel cell based on sodium borohydride hydrolysis to produce hydrogen, comprising a hydrogen generator 1, a heat pipe channel 2, a first plate-type solid oxide fuel cell 3, a second plate-type solid oxide fuel cell 4, a composite flow channel plate 5, a cathode flow channel plate 6, an anode flow channel plate 7, an anode cavity 8, a power generation unit cover plate 9, a hydrogen generator cover plate 10, a heating rod 11, a shell 12 and a shell cover plate 13;

[0041] The hydrogen generator 1 is connected to the anode cavity 8 through the heat pipe channel 2, the hydrogen generator cover plate 10 is in contact with the hydrogen generator 1, the anode cavity 8 is a groove-shaped cavity, the opening of the anode cavity 8 is connected to the anode flow channel plate 7, the anode flow channel plate 7 is sealed by the first plate-type solid oxide fuel cell 3, the anode of the first plate-type solid oxide fuel cell 3 faces the anode flow channel plate 7, the cathode faces the bottom cathode flow channel part of the composite flow channel plate 5, the top anode flow channel part of the composite flow channel plate 5 is sealed by the second plate-type solid oxide fuel cell 4, the cathode of the second plate-type solid oxide fuel cell 4 faces the cathode flow channel plate 6, and the cathode flow channel plate 6 is in contact with the power generation unit cover plate 9; the outer shell cover plate 13 is connected to the outer shell 12;

[0042] The first plate-type solid oxide fuel cell 3 and the second plate-type solid oxide fuel cell 4 include an electrolyte, a cathode and an anode, and the cathode and the anode are located on both sides of the electrolyte.

[0043] like Figure 3a and Figure 3b As shown, the heat pipe channel 2 includes a coaxially arranged tube shell and tube wall, an air supply channel 201 is formed in the tube wall, and a liquid wick 202 is arranged between the tube shell and the tube wall; the liquid wick 202 is made of an insulating capillary porous material, a cavity area 203 is arranged in the center and filled with a saturated heat exchange medium. The tube shell and the tube wall are both thermally conductive materials, the liquid wick 202 is an insulating and breathable porous medium structure, and the cavity area 203 contains a liquid or gaseous condensing agent.

[0044] The power generation unit part is a high-temperature area, and the hydrogen generator 1 is a low-temperature area. When the gas flows from the power generation unit to the hydrogen generator 1, the heat generated by the first plate-type solid oxide fuel cell 3 and the second plate-type solid oxide fuel cell 4 is transmitted to the liquid wick 202 of the outer ring of the heat pipe channel 2 through the high-temperature gas. The middle of the liquid wick 202 is a cavity area 203. The coolant in the cavity area 203 is vaporized by heat, and the gaseous coolant diffuses to the direction of the hydrogen generator 1 through the cavity area 203. During the flow process, heat is transmitted to the outside. The temperature at one end of the hydrogen generator 1 is reduced to convert the gaseous coolant into liquid coolant. The liquid The liquid coolant flows into the wick 202. According to Darcy's law, the liquid coolant realizes liquid reflux through the capillary force in the wick 202, realizing the circulation of the heat exchange medium. The inside of the wick 202 is pumped into a negative pressure state and filled with a suitable liquid. This liquid has a low boiling point and is easy to volatilize. The liquid in the wick 202 is quickly vaporized, and the vapor flows to the other end under the power of heat diffusion. The cavity area 203 accelerates this flow and condenses at the cold end to release heat. The liquid then flows back to the evaporation end along the porous material by capillary action. This cycle continues until the temperatures at both ends of the heat pipe are equal (at this time, the steam heat diffusion stops). This cycle is carried out quickly, and heat can be conducted continuously.

[0045] like Figure 4 As shown, the composite flow channel plate 5 has a symmetrical structure on both sides, and is provided with a second anode gas diffusion port 501, a second air inlet and outlet 502, and a composite plate flow channel 503. The composite flow channel plate 5 has a double-sided symmetrical structure, the second anode gas diffusion port 501 and the second air inlet and outlet 502 are diagonally distributed, the front part of the composite plate flow channel 503 is connected to the second air inlet and outlet 502, and the back part is connected to the second anode gas diffusion port 501; Figure 5 The front part is shown in the figure, the part where the second air inlet and outlet 502 is set is opened to form an inlet and outlet, and the other parts are provided with a surrounding edge flush with the top of the flow channel, and the opening through the surrounding edge on the same side as the second air inlet and outlet 502 corresponds to form a second anode gas diffusion port 501.

[0046] like Figure 5 As shown, the cathode flow channel plate 6 is a single-sided structure, provided with a first air inlet and outlet 601, a cathode flow channel 602 and a cathode terminal 603; the first air inlet and outlet 601 is diagonally distributed and connected to the cathode flow channel 602, and is provided with a cathode terminal 603; the portion of the cathode flow channel plate 6 where the first air inlet and outlet 601 is provided is open to form an inlet and outlet, and the other portions are provided with a surrounding edge flush with the top of the flow channel.

[0047] like Figure 6As shown, the anode channel plate 7 is a single-sided structure, provided with a first anode gas diffusion port 701, an anode channel 702 and an anode terminal 703; the first anode gas diffusion port 701 is diagonally distributed and connected to the anode channel 702, and is provided with an anode terminal 703. A surrounding edge flush with the top of the channel is provided around the anode channel plate 7, and the first anode gas diffusion port 701 is provided adjacent to the surrounding edge and penetrates through.

[0048] The mixture of sodium borohydride hydrolysis to produce hydrogen inside the hydrogen generator 1 includes sodium borohydride powder, sodium borohydride hydrolysis catalyst and salt crystal hydrate; the salt crystal hydrate is used to produce water required for hydrolysis when starting, and absorb excess water after stopping. In this preferred embodiment, the salt crystal hydrate uses Na2SO4·10H2O as the water source for the hydrogen production reaction, and the mass ratio of sodium borohydride powder to Na2SO4·10H2O is 1:5; at the same time, other salt crystal hydrates can be used in the present invention, as long as they can provide a water source through crystal water and absorb water after the reaction stops, they can be used, not just limited to the Na2SO4·10H2O given in the present invention.

[0049] The housing 12 is provided with a channel opening 1201, an anode connection opening 1202, a cathode connection opening 1203 and a heating rod interface 1204. The channel opening 1201 of the housing 12 is connected to the heat pipe channel 2, the anode connection opening 1202 is connected to the anode connection terminal 703, the cathode connection opening 1203 is connected to the cathode connection terminal 603, and the heating rod interface 1204 is connected to the heating rod 11.

[0050] The all-solid-state fuel cell based on sodium borohydride hydrolysis to produce hydrogen in the present invention comprises the following steps during operation:

[0051] When the all-solid-state fuel cell is in a non-operating state, the all-solid-state fuel cell has no external power output. At this time, the internal operating temperature of the all-solid-state fuel cell is consistent with the external ambient temperature. Since the second air inlet and outlet 502 and the first air inlet and outlet 601 are connected to the external air, the cathode flow channel 602 and the cathode part of the composite plate flow channel 503 are filled with air.

[0052] When the all-solid-state fuel cell is converted from a non-working state to a startup process state, the power supply interface of the heating rod 11 is connected to the external circuit, the heating rod 11 heats the air in the power generation unit, and the heated air enters the hydrogen generator 1 through the heat pipe channel 2. When the temperature of the hydrogen generator 1 reaches the set temperature, the salt crystal hydrate in the hydrogen generator 1 releases water molecules, and the water molecules react with the sodium borohydride powder in the hydrogen generator 1 to produce hydrogen. The hydrogen diffuses to the anode cavity 8 through the heat pipe channel 2, passes through the anode flow channel plate 7 and the anode part of the composite flow channel plate 5, and reaches the anode part of the first plate-type solid oxide fuel cell 3 and the second plate-type solid oxide fuel cell 4. The air passes through the cathode flow channel plate 6 and the cathode part of the composite flow channel plate 5 and reaches the cathode part of the first plate-type solid oxide fuel cell 3 and the second plate-type solid oxide fuel cell 4.

[0053] When the all-solid-state fuel cell is in working condition, the hydrogen on the anode side of the first plate-type solid oxide fuel cell 3 and the second plate-type solid oxide fuel cell 4 loses electrons and becomes hydrogen ions, and the lost electrons reach the cathode of the first plate-type solid oxide fuel cell 3 and the second plate-type solid oxide fuel cell 4 through the external power-using end, and the oxygen in the air on the cathode side obtains electrons and becomes oxygen ions, and the oxygen ions reach the anode of the first plate-type solid oxide fuel cell 3 and the second plate-type solid oxide fuel cell 4 through the electrolyte layer and combine with hydrogen ions to generate water. In this process, the fuel cell outputs electric energy to the outside for the external power-using end; wherein, the number of moles of water molecules generated at the anode is equal to the number of moles of hydrogen participating in the hydrogen-oxygen electrochemical reaction, and the product water molecules of the hydrogen-oxygen electrochemical reaction diffuse into the hydrogen generator 1 through the anode flow channel plate 7 and the anode part of the composite flow channel plate 5, so that the sodium borohydride powder in the hydrogen generator 1 continues to undergo a hydrolysis reaction, wherein the number of water molecules participating in the hydrolysis reaction of the sodium borohydride powder in the hydrogen generator 1 is equal to the number of hydrogen produced by the hydrolysis reaction, so that water and hydrogen form a closed material cycle;

[0054] The power generation unit part is a high-temperature area, and the hydrogen generator 1 is a low-temperature area. When the gas flows from the power generation unit to the hydrogen generator 1, the heat generated by the first plate-type solid oxide fuel cell 3 and the second plate-type solid oxide fuel cell 4 is transmitted to the liquid wick 202 of the outer ring of the heat pipe channel 2 through the high-temperature gas. The middle of the liquid wick 202 is a cavity area 203. The coolant in the cavity area 203 is heated and gasified. The gaseous coolant diffuses to the direction of the hydrogen generator 1 through the cavity area 203. During the flow process, the heat is transmitted to the outside. At one end of the hydrogen generator 1, the temperature is reduced to make the gaseous coolant turn into liquid coolant. The liquid coolant flows into the liquid wick 202. According to Darcy's law, the liquid coolant realizes liquid reflux through the capillary force in the liquid wick 202 to realize circulation;

[0055] When the all-solid-state fuel cell is in the shutdown process, the external power transmission current is cut off, the anode water generation rate of the first plate solid oxide fuel cell 3 and the second plate solid oxide fuel cell 4 drops to a minimum, and accordingly, the hydrogen production reaction of the hydrogen generator 1 drops to a minimum, the heat generated inside the all-solid-state fuel cell is minimal, and the temperature inside the all-solid-state fuel cell gradually decreases until the working current of the first plate solid oxide fuel cell 3 and the second plate solid oxide fuel cell 4 approaches zero, and no water is generated at the anode of the first plate solid oxide fuel cell 3 and the second plate solid oxide fuel cell 4. Accordingly, the hydrogen production reaction in the hydrogen generator 1 gradually stops, and the all-solid-state fuel cell enters a non-working state.

Claims

1. An all-solid-state fuel cell based on hydrogen production by hydrolysis of sodium borohydride, characterized in that: It comprises a hydrogen generator (1), a heat pipe channel (2) and a power generation unit; The hydrogen generator (1) contains a mixture of solid sodium borohydride hydrolyzed to produce hydrogen; The power generation unit comprises an anode cavity (8) and a power generation unit cover plate (9) which are tightly connected, and an anode flow channel plate (7), a first plate-type solid oxide fuel cell (3), a multi-stage composite unit and a cathode flow channel plate (6) which are sequentially stacked and pressed from bottom to top between the anode cavity (8) and the power generation unit cover plate (9); the composite unit comprises a composite flow channel plate (5) and a second plate-type solid oxide fuel cell (4) which are sequentially stacked and pressed from bottom to top; The anode channel plate (7) is provided with an anode channel (702) and an anode terminal (703), as well as a first anode gas diffusion port (701) which is in communication with the anode channel (702) and the anode cavity (8) respectively; The cathode flow channel plate (6) is provided with a cathode flow channel (602) and a cathode terminal (603), as well as a first air inlet and outlet (601) connected to the cathode flow channel (602); Flow channels are arranged on both sides of the composite flow channel plate (5), the flow channel on the side close to the cathode flow channel plate (6) is connected to the first anode gas diffusion port (701), and the flow channel on the other side is connected to the first air inlet and outlet (601); The evaporation end of the heat pipe channel (2) is connected to the interior of the anode cavity (8) for heat conduction, and the condensation end is connected to the interior of the hydrogen generator (1) for heat conduction.

2. The all-solid-state fuel cell based on sodium borohydride hydrolysis to produce hydrogen according to claim 1, characterized in that: It also comprises a shell and a heating rod (11), wherein the shell comprises an outer shell (12) and an outer shell cover plate (13) connected to an opening of the outer shell (12), and the heating rod (11) passes through the outer shell (12) and is arranged in the shell.

3. The all-solid-state fuel cell based on sodium borohydride hydrolysis to produce hydrogen according to claim 2, characterized in that: The housing (12) is provided with a channel opening (1201) corresponding to the heat pipe channel (2), an anode wiring opening (1202) corresponding to the anode wiring terminal (703), a cathode wiring opening (1203) corresponding to the cathode wiring terminal (603), and a heating rod interface (1204) corresponding to the heating rod (11).

4. The all-solid-state fuel cell based on sodium borohydride hydrolysis to produce hydrogen according to claim 1, characterized in that: The anode cavity (8) is a groove-shaped cavity, the opening of the anode cavity (8) is sealedly connected to the anode flow channel plate (7), and the interior of the anode cavity (8) is sealedly connected to the first anode gas diffusion port (701); A second anode gas diffusion port (501) and a second air inlet and outlet (502) are respectively arranged on both sides of the composite flow channel plate (5); the flow channel on one side close to the cathode flow channel plate (6) is sealed and connected to the first anode gas diffusion port (701) through the second anode gas diffusion port (501); and the flow channel on the other side is sealed and connected to the first air inlet and outlet (601) through the second air inlet and outlet (502).

5. The all-solid-state fuel cell based on sodium borohydride hydrolysis to produce hydrogen according to claim 4, characterized in that: The flow channels on both sides of the composite flow channel plate (5) are arranged symmetrically on both sides, and the second anode gas diffusion port (501) and the second air inlet and outlet (502) are respectively diagonally distributed. The cathode flow channel plate (6) is a single-sided structure, and the first air inlet and outlet (601) are diagonally distributed; The anode channel plate (7) is a single-sided structure, and the first anode gas diffusion ports (701) are diagonally distributed.

6. The all-solid-state fuel cell based on sodium borohydride hydrolysis to produce hydrogen according to claim 1, characterized in that: The heat pipe channel (2) comprises a coaxially arranged tube shell and tube wall, an air supply channel (201) is formed in the tube wall, and a liquid wick (202) is arranged between the tube shell and the tube wall; the liquid wick (202) is made of an insulating capillary porous material, a cavity area (203) is arranged at the center and is filled with a saturated heat exchange medium.

7. The all-solid-state fuel cell based on sodium borohydride hydrolysis to produce hydrogen according to claim 1, characterized in that: The hydrogen generator (1) is arranged in a cylindrical shape, with one end being open and sealed by a hydrogen generator cover plate (10) arranged in conjunction therewith.

8. The all-solid-state fuel cell based on sodium borohydride hydrolysis to produce hydrogen according to claim 7, characterized in that: The hydrogen generator (1) is arranged horizontally, and a plurality of heat pipe channels (2) are arranged in sequence along the busbar direction.

9. The all-solid-state fuel cell based on sodium borohydride hydrolysis to produce hydrogen according to claim 1, characterized in that: The mixture for producing hydrogen by hydrolyzing sodium borohydride comprises sodium borohydride powder, a sodium borohydride hydrolysis catalyst and salt crystal hydrate.

10. The all-solid-state fuel cell based on sodium borohydride hydrolysis to produce hydrogen according to claim 9, characterized in that: The salt crystal hydrate uses Na2SO4·10H2O as a water source for hydrogen production reaction, and the mass ratio of sodium borohydride powder to Na2SO4·10H2O is 1:5.

Images