Hydrogen preparation device and method

Abstract

The invention relates to the technical field of energy, in particular to a hydrogen preparation device and method.The device comprises a battery body and a power source; electrolyte, a proton exchange membrane, a negative electrode material and a positive electrode material are arranged in the battery body, and the negative electrode material and the positive electrode material are respectively arranged on two sides of the proton exchange membrane and are respectively connected with a negative electrode and a positive electrode of a power supply; an oxidation-reduction medium is arranged in the electrolyte in which the positive electrode material is located, and hydrogen is prepared by using an oxidation reaction of the oxidation-reduction medium and a hydrogen generation reaction at the negative electrode material. Therefore, the problems that high-purity hydrogen is difficult to obtain, the preparation speed is low, explosive hydrogen-oxygen mixed gas is easy to generate and the like in a traditional water electrolysis hydrogen production technology are solved.

Description

Technical Field

[0001] The present application relates to the field of energy technology, and in particular to a hydrogen preparation device and method. Background Art

[0002] Hydrogen production by water electrolysis, as the reverse reaction of hydrogen combustion, is regarded as a green and sustainable energy solution, using only water as raw material to achieve a tight hydrogen cycle. In theory, this process not only reduces dependence on fossil fuels, but also reduces greenhouse gas emissions, making it an important part of the future clean energy system.

[0003] However, in the related technology, the technology of hydrogen production by water electrolysis still faces many challenges, which limits its wide application. During the electrolysis process, hydrogen and oxygen are generated almost at the same time, which makes it difficult to obtain high-purity hydrogen. At the same time, in order to prevent hydrogen and oxygen from mixing, a diaphragm is usually used in the electrolyzer to separate the two gases. This method not only increases the cost of the equipment, but also with the aging of the diaphragm, there is a risk of hydrogen and oxygen mixing. Since the hydrogen and oxygen mixed gas is prone to explosion, it increases the safety hazard. Summary of the invention

[0004] The present application provides a hydrogen preparation device and method to solve the problems of the traditional water electrolysis hydrogen production technology, such as difficulty in obtaining high-purity hydrogen, slow preparation speed, and easy generation of explosive hydrogen-oxygen mixed gas.

[0005] The first aspect of the present application provides a hydrogen preparation device, comprising: a battery body and a power source; an electrolyte, a proton exchange membrane, a negative electrode material and a positive electrode material are arranged in the battery body, wherein the negative electrode material and the positive electrode material are respectively arranged on both sides of the proton exchange membrane, and the negative electrode material and the positive electrode material are respectively connected to the negative electrode and the positive electrode of the power source; an oxidation-reduction medium is arranged in the electrolyte where the positive electrode material is located, and hydrogen is prepared by utilizing the oxidation reaction of the oxidation-reduction medium and the hydrogen generation reaction at the negative electrode material.

[0006] Optionally, the negative electrode material is a first catalyst for a hydrogen generation reaction.

[0007] Optionally, the first catalyst is a Pt / C catalyst.

[0008] Optionally, the redox mediator is Ce 3+ .

[0009] Optionally, the positive electrode material is carbon felt.

[0010] Optionally, the hydrogen preparation device also includes: a positive electrode tank and a first water pump, wherein a second catalyst is arranged in the positive electrode tank for reducing the redox medium after the oxidation reaction, and the first water pump is used to pump the electrolyte carrying the redox medium into the battery body.

[0011] Optionally, the second catalyst is RuO 2 catalyst.

[0012] Optionally, the hydrogen preparation device further includes: a negative electrode tank and a second water pump, wherein the hydrogen prepared by the hydrogen generation reaction is introduced into the negative electrode tank, and the hydrogen ions generated by the negative electrode tank are transported into the battery body through the second water pump.

[0013] Optionally, the hydrogen preparation device also includes: a hydrogen storage tank for storing the hydrogen in the negative electrode tank.

[0014] The second aspect of the present application provides a method for preparing hydrogen, which uses the hydrogen preparation device of the first aspect to prepare hydrogen, wherein the method includes the following steps: setting an electrolyte in a battery body; energizing the negative electrode material and the positive electrode material in the battery body; after energization, an oxidation reaction based on a redox medium at the positive electrode material generates negative ions, and a hydrogen generation reaction based on hydrogen ions and negative ions at the negative electrode material prepares hydrogen.

[0015] Therefore, this application includes the following beneficial effects:

[0016] The hydrogen preparation device proposed in the embodiment of the present application includes a battery body and a power supply, wherein an electrolyte, a proton exchange membrane, a negative electrode material and a positive electrode material are arranged in the battery body, and the negative electrode material and the positive electrode material are respectively connected to the negative electrode and the positive electrode of the power supply, and an oxidation-reduction medium is arranged in the electrolyte where the positive electrode material is located, and hydrogen is prepared by utilizing the oxidation reaction of the redox medium and the hydrogen generation reaction at the negative electrode material, thereby solving the interference of oxygen on hydrogen during the electrolysis of water, improving the preparation speed of hydrogen, and obtaining high-purity hydrogen. Thus, the problems of the difficulty in obtaining high-purity hydrogen, the slow preparation speed, and the easy generation of explosive hydrogen-oxygen mixed gas in the traditional water electrolysis hydrogen production technology are solved.

[0017] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0019] Figure 1 This is a structural example diagram of a hydrogen production device provided according to an embodiment of the present application;

[0020] Figure 2 A schematic diagram of a hydrogen production device provided according to an embodiment of the present application;

[0021] Figure 3A graph showing cyclic voltammetry and linear sweep voltammetry according to one embodiment of the present application;

[0022] Figure 4 The present invention is a schematic diagram of a process for preparing hydrogen according to an embodiment of the present application. DETAILED DESCRIPTION

[0023] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0024] The following describes the hydrogen preparation device and method of the embodiment of the present application with reference to the accompanying drawings. In view of the problems mentioned in the above background technology that the traditional water electrolysis hydrogen production technology is difficult to obtain high-purity hydrogen, the preparation speed is slow, and it is easy to generate explosive hydrogen-oxygen mixed gas, the present application provides a hydrogen preparation device, the device includes a battery body and a power supply, the battery body is provided with an electrolyte, a proton exchange membrane, a negative electrode material and a positive electrode material, the negative electrode material and the positive electrode material are respectively connected to the negative electrode and the positive electrode of the power supply, and a redox medium is provided in the electrolyte where the positive electrode material is located, and hydrogen is prepared by the oxidation reaction of the redox medium and the hydrogen generation reaction at the negative electrode material, which solves the interference of oxygen on hydrogen in the water electrolysis process, improves the preparation speed of hydrogen, and obtains high-purity hydrogen. Thus, the problems that the traditional water electrolysis hydrogen production technology is difficult to obtain high-purity hydrogen, the preparation speed is slow, and it is easy to generate explosive hydrogen-oxygen mixed gas are solved.

[0025] Specifically, Figure 1 This is a structural example diagram of a hydrogen production device provided in an embodiment of the present application.

[0026] like Figure 1 As shown, the hydrogen production device includes a battery body 11 and a power source 12.

[0027] Among them, the battery body 11 is provided with an electrolyte 101, a proton exchange membrane 102, a negative electrode material 103 and a positive electrode material 104, wherein the negative electrode material 103 and the positive electrode material 104 are respectively arranged on both sides of the proton exchange membrane 102, and the negative electrode material 103 and the positive electrode material 104 are respectively connected to the negative electrode and the positive electrode of the power source 12; an oxidation-reduction medium is arranged in the electrolyte 101 where the positive electrode material 104 is located, and hydrogen is prepared by utilizing the oxidation reaction of the oxidation-reduction medium and the hydrogen generation reaction at the negative electrode material 103.

[0028] It can be understood that the electrolyte 101, the proton exchange membrane 102, the negative electrode material 103 and the positive electrode material 104 constitute the battery body 11. In the battery body 11, the electrolyte 101 is separated by the proton exchange membrane 102. The negative electrode material 103 and the positive electrode material 104 are respectively arranged in the electrolyte 101 on both sides. The negative electrode material 103 and the positive electrode material 104 are respectively connected to the negative electrode and the positive electrode of the power source 12. A hydrogen generation reaction, namely HER (Hydrogen Evolution Reaction) reaction, occurs at the negative electrode material 103. The HER reaction refers to the process in which hydrogen ions H+ in an aqueous solution obtain electrons on the surface of the negative electrode to form hydrogen H; a redox medium is arranged in the electrolyte 101 where the positive electrode material 104 is located, and an oxidation reaction is generated by the redox medium, which replaces the traditional OER (Oxygen Evolution Reaction) in which water molecules lose electrons at the positive electrode to form oxygen and produce hydrogen ions at the same time. Reaction, oxygen evolution reaction) reaction, so that the negative electrode hydrogen generation reaction completely get rid of the interference of oxygen, complete the spatial decoupling of the hydrogen and oxygen generation reaction.

[0029] In the embodiment of the present application, the negative electrode material 103 is a first catalyst for hydrogen generation reaction.

[0030] Among them, the first catalyst is an acidic HER catalyst, which can be used to promote the occurrence of HER reaction, such as platinum (Pt) and its alloys, palladium (Pd) and its compounds, and transition metal sulfides such as nickel (Ni), molybdenum (Mo), and tungsten (W).

[0031] It can be understood that the embodiment of the present application uses a catalyst material that can promote the occurrence of HER as the negative electrode material 103, that is, the first catalyst.

[0032] In the embodiment of the present application, the first catalyst is a Pt / C catalyst.

[0033] Among them, Pt is platinum, which is one of the most effective hydrogen evolution catalysts with excellent catalytic activity; C is carbon, which can be used as a carrier to provide a large surface area and good electronic conductivity.

[0034] It can be understood that the embodiment of the present application selects Pt / C catalyst as the first catalyst, utilizing the excellent catalytic activity of Pt and the large surface area and good electronic conductivity provided by C, so that HER at the negative electrode occurs more efficiently.

[0035] In the present embodiment, the redox medium is Ce 3+ .

[0036] Among them, Ce 3+It is the trivalent form of cerium (Ce), which can be oxidized to the tetravalent form Ce under certain conditions. 4+ , Ce 3+ To Ce 4+ The conversion of Ce is a single electron oxidation process: 3+ -e - →Ce 4+ .

[0037] It is understandable that in the present embodiment, Ce is provided in the electrolyte 101 at the positive electrode material 104. 3+ As a redox medium, Ce is 3+ Lose electrons, undergo oxidation reaction, and turn Ce 3+ Oxidized to Ce 4+ , thus replacing the original OER reaction and preventing the generation of oxygen at the positive electrode, and Ce 3+ / 4+ The potential difference between the redox peaks is particularly small, which has a smaller overpotential than the four-electron controlled OER reaction and can meet the thermodynamic requirements of spontaneous reactions, replacing the kinetically slow OER reaction and making it easier to occur.

[0038] In the embodiment of the present application, the positive electrode material 104 is carbon felt.

[0039] Among them, carbon felt is a porous material made of carbon fiber. Carbon felt has a high specific surface area, can provide a large number of active sites, and has good conductivity and corrosion resistance.

[0040] It is understandable that the embodiment of the present application uses carbon felt as the positive electrode material 104, and utilizes the large number of active sites and good conductivity provided by the carbon felt to make Ce 3+ The oxidation reaction can proceed more fully.

[0041] In an embodiment of the present application, the hydrogen preparation device also includes: a positive electrode tank and a first water pump, wherein a second catalyst is arranged in the positive electrode tank for performing a reduction reaction on the redox medium after the oxidation reaction, and the first water pump is used to pump the electrolyte carrying the redox medium into the battery body 11.

[0042] The second catalyst is used to reduce the redox medium after the oxidation reaction, and can be ruthenium dioxide (RuO), iridium oxide (IrO) and manganese oxide (MnO x )etc.

[0043] It can be understood that in the cathode tank, the embodiment of the present application is provided with a second catalyst that can perform a reduction reaction on the redox medium after the oxidation reaction, that is, using the catalyst to reduce Ce 4+ Restore to Ce 3+The first water pump is used to pump the Ce-containing 3+ The electrolyte is pumped into the battery body 11, that is, returned to the electrolyte 101 in the positive electrode material 104 to participate in the next oxidation reaction, forming a cycle.

[0044] In the embodiment of the present application, the second catalyst is a RuO catalyst.

[0045] Among them, RuO is ruthenium dioxide, which is a very effective electrocatalyst that can significantly reduce the overpotential of the OER reaction and improve the efficiency of water electrolysis.

[0046] It is understandable that the embodiment of the present application uses RuO as the second catalyst, and utilizes the high catalytic activity of RuO as well as the effects of kinetics and thermodynamics to make Ce in the positive electrode tank 4+ Spontaneous discharge restores to Ce 3+ , improving the reaction efficiency.

[0047] In an embodiment of the present application, the hydrogen preparation device further includes: a negative electrode tank and a second water pump.

[0048] The hydrogen produced by the hydrogen generation reaction is introduced into the negative electrode tank, and the hydrogen ions in the negative electrode tank are transported into the battery body 11 through the second water pump.

[0049] It can be understood that the hydrogen generated at the negative electrode of the battery moves to the negative electrode tank under the action of the second water pump and the electrolyte, separates the hydrogen from the electrolyte, stores the hydrogen, and the remaining hydrogen ions H + The electrolyte is sent back to the battery body 11, that is, back to the electrolyte 101 where the negative electrode material 103 is located, under the action of the second water pump, to participate in the next HER reaction, forming a cycle.

[0050] In the embodiment of the present application, the hydrogen preparation device also includes: a hydrogen storage tank.

[0051] Among them, the hydrogen storage tank is used to store the hydrogen in the negative electrode tank.

[0052] It will be appreciated that the hydrogen separated from the electrolyte 101 in the negative electrode tank may be stored in the tank.

[0053] According to the hydrogen preparation device proposed in the embodiment of the present application, an electrolyte, a proton exchange membrane, a negative electrode material and a positive electrode material are arranged in a battery body, the negative electrode material and the positive electrode material are respectively connected to the negative electrode and the positive electrode of a power source, and the power source is used for charging. A HER reaction occurs on the negative electrode material to generate hydrogen, and an oxidation reaction occurs on the positive electrode material using a redox medium instead of a traditional OER reaction. This allows the negative electrode to generate hydrogen completely free from the interference of oxygen, completes the spatial decoupling of the hydrogen and oxygen generation reactions, and obtains high-purity hydrogen.

[0054] The hydrogen production device is further described below by a specific embodiment, as follows:

[0055] like Figure 2 As shown, the hydrogen preparation device consists of a power source 12, a battery 11, a positive electrode tank 201, a negative electrode tank 202, a hydrogen storage tank 203 and two flow pumps, namely a first water pump 204 and a low-temperature water pump 205.

[0056] The positive electrode material 104 may be carbon felt, the negative electrode material 103 may be a Pt / C catalyst, the proton exchange membrane 102 may be a Nafion membrane, and two end plates and two flow channel plates not shown are formed. The positive electrode tank 201 may have a RuO 2 Catalyst bed, the Pt / C catalyst negative electrode can be replaced with other acidic HER catalysts with excellent performance.

[0057] Therefore, the embodiment of the present application introduces Ce by means of the structure of the flow battery. 3+ / 4+ The reaction replaces the traditional OER reaction, quickly generates hydrogen while avoiding the interference of oxygen. The specific process is as follows:

[0058] The present embodiment uses Pt / C catalyst as the negative electrode material 103 of the liquid flow battery. + Hydrogen is rapidly generated at the active sites of Pt / C and then moves to the hydrogen storage tank 203 under the action of the second water pump 205 and the electrolyte.

[0059] For the positive electrode, carbon felt is used as the positive electrode material 104. On the carbon felt, Ce 3+ It will be charged and oxidized to Ce 4+ , and then moves to the RuO in the positive electrode tank 201 under the action of the first water pump 204 and the electrolyte. 2 On the catalyst bed, Ce generated on the carbon felt under the action of kinetics and thermodynamics 4+ Will spontaneously discharge and return to Ce 3+ At the same time, water will be oxidized into oxygen. The generated Ce 3+ Under the action of the first water pump 204, it will move again to the carbon felt of the positive electrode material 104 to participate in the next cycle reaction.

[0060] Through the above method, the hydrogen generation reaction at the negative electrode can be completely free from the interference of oxygen, completing the spatial decoupling of the hydrogen and oxygen generation reactions.

[0061] The specific reactions are as follows:

[0062] HER: cathode: Ce 3+ -e - →Ce 4+

[0063] Negative electrode: H+ +e - →H 2

[0064] OER:

[0065] like Figure 3 As shown, the cyclic voltammetry (CV) curve of Ce3+ / 4+, and the linear sweep voltammetry (LSV) curve of HER of Pt / C and OER of RuO2 are shown in the figure, when the electrolyte concentration is 0.5M H2SO4 and the scan rate is 5mV s-1. Among them, Pt / C and RuO2 are both prepared by coating.

[0066] Depend on Figure 3 It can be obtained that the redox potential of Ce3+ / 4+ is just between HER and OER, which can reduce the required instantaneous energy demand. At the same time, the redox reaction of Ce3+ / 4+ can replace the OER reaction, avoiding the interference of oxygen with hydrogen. The potential difference between the redox peaks of Ce3+ / 4+ is particularly small, and has a smaller overpotential than the four-electron controlled OER reaction.

[0067] from Figure 3 It can be seen that the reduction potential of Ce4+ generated at the electrode is lower than the OER potential of RuO2, which can meet the thermodynamic requirements of the spontaneous reaction. It can spontaneously generate oxygen on the RuO2 catalyst bed in the positive electrode energy storage tank while discharging to generate Ce3+ and enter the next cycle.

[0068] Next, the hydrogen preparation method proposed in accordance with the embodiment of the present application is described with reference to the accompanying drawings.

[0069] Figure 4 It is a schematic diagram of the process of preparing hydrogen according to an embodiment of the present application.

[0070] like Figure 4 As shown, the hydrogen preparation method includes the following steps:.

[0071] In step S201, an electrolyte is placed in a battery body.

[0072] Among them, the electrolyte is an acidic electrolyte, and the HER reaction needs to occur in the acidic electrolyte to generate hydrogen.

[0073] It is understandable that in the embodiment of the present application, an electrolyte suitable for the reaction to occur can be provided in the battery body so that the desired reaction can occur smoothly.

[0074] In step S202, electricity is supplied to the negative electrode material and the positive electrode material in the battery body.

[0075] Among them, the purpose of applying electricity is to make water molecules undergo HER reaction and oxidation reaction on the two electrodes under the action of the electric field.

[0076] It can be understood that in the embodiment of the present application, the negative electrode material and the positive electrode material in the battery body are energized, so that the electrolyte undergoes HER reaction under the catalysis of the negative electrode material and the action of the electric field, Ce 3+ Under the action of the electric field, an oxidation reaction occurs, replacing the traditional OER reaction.

[0077] In step S203, after power is turned on, an oxidation reaction of the redox medium generates negative ions at the positive electrode material, and a hydrogen generation reaction of hydrogen ions and negative ions at the negative electrode material generates hydrogen.

[0078] Among them, negative ions are electrons; redox mediators are Ce 3+ .

[0079] It is understandable that after the embodiment of the present application is powered on, an oxidation reaction occurs at the positive electrode, Ce 3+ Lose electrons to become Ce 4+ , and the electrons combine with hydrogen ions at the negative electrode to generate hydrogen, thereby obtaining prepared hydrogen.

[0080] It should be noted that the above explanations and descriptions of the embodiment of the hydrogen preparation device are also applicable to the hydrogen preparation method of this embodiment, and will not be repeated here.

[0081] According to the hydrogen preparation method proposed in the embodiment of the present application, an electrolyte is arranged in the battery body and the battery is powered on. After power is turned on, negative ions are generated at the positive electrode material based on the oxidation reaction of the redox medium, and hydrogen is prepared at the negative electrode material based on the hydrogen generation reaction of the hydrogen ions and the negative ions, thereby achieving the goal of completely getting rid of the interference of oxygen in the negative electrode hydrogen generation reaction and completing the spatial decoupling of the hydrogen and oxygen generation reactions.

[0082] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or N embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0083] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, "N" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0084] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, fragment or portion of code comprising one or N executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present application belong.

[0085] It should be understood that the various parts of the present application can be implemented in hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, the steps or methods can be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array, a field programmable gate array, etc.

[0086] A person of ordinary skill in the art may understand that all or part of the steps carried by the method for implementing the above-mentioned embodiment may be completed by instructing related hardware through a program, and the above-mentioned program may be stored in a computer-readable storage medium, which, when executed, includes one of the steps of the method embodiment or a combination thereof.

[0087] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A hydrogen production device, characterized in that: include: Battery body and power source; The battery body is provided with an electrolyte, a proton exchange membrane, a negative electrode material and a positive electrode material, wherein the negative electrode material and the positive electrode material are respectively arranged on both sides of the proton exchange membrane, and the negative electrode material and the positive electrode material are respectively connected to the negative electrode and the positive electrode of the power source; A redox medium is provided in the electrolyte where the positive electrode material is located, and hydrogen is prepared by utilizing an oxidation reaction of the redox medium and a hydrogen generation reaction at the negative electrode material.

2. The hydrogen production device according to claim 1, characterized in that: The negative electrode material is used as a first catalyst for the hydrogen generation reaction.

3. The hydrogen production device according to claim 2, characterized in that: The first catalyst is a Pt / C catalyst.

4. The hydrogen production device according to claim 1, characterized in that: The redox mediator is Ce 3+ .

5. The hydrogen production device according to claim 1, characterized in that: The positive electrode material is carbon felt.

6. The hydrogen production device according to claim 1, characterized in that: Also includes: A positive electrode tank and a first water pump, wherein a second catalyst is arranged in the positive electrode tank for reducing the redox medium after the oxidation reaction, and the first water pump is used to pump the electrolyte carrying the redox medium into the battery body.

7. The hydrogen production device according to claim 6, characterized in that: The second catalyst is a RuO2 catalyst.

8. The hydrogen production device according to claim 1, characterized in that: Also includes: A negative electrode tank and a second water pump, wherein the hydrogen produced by the hydrogen generation reaction is introduced into the negative electrode tank, and the hydrogen ions produced by the negative electrode tank are transported into the battery body through the second water pump.

9. The hydrogen production device according to claim 1, characterized in that: Also includes: The hydrogen storage tank is used to store the hydrogen in the negative electrode tank.

10. A method for producing hydrogen, characterized in that: The method uses the hydrogen preparation device according to any one of claims 1 to 9 to prepare hydrogen, wherein the method comprises the following steps: Disposing an electrolyte in the battery body; Applying electricity to the negative electrode material and the positive electrode material in the battery body; After power is supplied, anions are generated at the positive electrode material based on an oxidation reaction of a redox medium, and hydrogen is produced at the negative electrode material based on a hydrogen generation reaction between hydrogen ions and the anions.

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