Hydrogen storage testing device of field force disturbance high-flux hydrogen storage material

Abstract

A hydrogen storage testing device of a field force disturbance high-flux hydrogen storage material comprises a tank body and a tank cover, an air inlet is formed in the tank cover, and an air inlet valve is installed on the air inlet; a thermocouple is mounted on the upper surface of the tank cover; two through holes used for installing the positive electrode power connection column and the negative electrode power connection column are formed in the bottom of the tank body, a fixing box is arranged in an inner cavity of the tank body, two electrodes are arranged in an inner cavity of the fixing box, and two fixing holes matched with the positive electrode power connection column and the negative electrode power connection column respectively are formed in a bottom plate of the fixing box. The positive electrode power connection column and the negative electrode power connection column sequentially penetrate through the corresponding through holes and the fixing holes to extend into the inner cavity of the fixing box, and the positive electrode power connection column and the negative electrode power connection column abut against the corresponding electrode slices respectively. The hydrogen storage device has the advantages that the operation is simple, the quantity of the loadable hydrogen storage material is increased, the distance between the positive pole piece and the negative pole piece is easy to adjust, and the electric field intensity can be regulated and controlled, so that the device is suitable for different hydrogen storage materials.

Description

Technical Field

[0001] The utility model relates to a hydrogen storage testing device for a field force disturbance high-flux hydrogen storage material. Background Art

[0002] In the context of global clean energy development, hydrogen energy has attracted much attention due to its unique advantages. As a clean, efficient and sustainable energy source, hydrogen energy has become an important direction of clean energy research due to its abundant reserves, high calorific value and pollution-free characteristics. Among them, solid-state hydrogen storage technology has become a hot topic in current research due to its advantages of high safety, high mass density and low cost.

[0003] Regarding the detection of hydrogen storage performance of solid hydrogen storage materials, CN221038565U discloses "a test device for electrically controllable hydrogen storage materials". The device consists of a cylindrical shell, a sealing cap, a connecting core, a sealing tube, a sample tube, a positive electrode plate, a negative electrode plate and a thermocouple. The hydrogen tube is connected to the hydrogen tank and the pressure gauge to control the inflow of hydrogen and measure the hydrogen pressure. Hydrogen is introduced into the sample tube through the hydrogen tube, and the electrically controllable hydrogen storage material in the sample tube stores and releases hydrogen under the action of electric current. Thermocouples are used to monitor temperature changes, while the positive electrode plate and the negative electrode plate provide the required electrochemical reaction environment. The advantages are: the device has a reasonable structure, can achieve efficient hydrogen storage and release at room temperature, has the characteristics of high accuracy and good repeatability, and is suitable for testing the hydrogen absorption and release performance of electrically controllable hydrogen storage materials. However, the testing device also has some limitations, mainly including: the device uses a copper mesh as a carrier of solid hydrogen storage materials. When carrying solid hydrogen storage materials, it needs to be mixed with the solid hydrogen storage materials and then dried for subsequent testing. The operation is complicated and it is difficult to discharge the hydrogen storage materials to be tested. The mass of hydrogen storage materials that can be loaded on the copper mesh is limited, and the distance between the positive electrode and the negative electrode is fixed. Different hydrogen storage materials require different orders of magnitude of electric field strength to reduce their Gibbs free energy to reduce the energy barrier of the hydrogen absorption reaction. Therefore, the cost of improving the spacing based on the specific material is high, and the magnitude of the detection material is limited. There are limitations in both the material mass and the electric field magnitude regulation. Summary of the invention

[0004] The technical problem to be solved by the utility model is to provide a hydrogen storage material test device which is easy to discharge the test sample, simple to operate, can increase the amount of hydrogen storage material that can be loaded, is easy to adjust the distance between the positive electrode plate and the negative electrode plate, and has an adjustable electric field strength for field force disturbance of high-throughput hydrogen storage materials.

[0005] The utility model is achieved in this way:

[0006] A hydrogen storage test device for field force disturbance high-flux hydrogen storage materials comprises a tank body and a tank cover, a sealing gasket is arranged between the tank body and the tank cover, and the tank body and the tank cover are fixedly connected by bolts, and the special features thereof are: an air inlet is opened on the tank cover, and an air inlet valve is installed on the air inlet; a thermocouple is installed on the upper surface of the tank cover, and the temperature measuring end of the thermocouple passes through the tank cover and extends to the tank body;

[0007] Two through holes for installing the positive and negative poles are arranged at the bottom of the tank body, a fixing box is arranged in the inner cavity of the tank body, two electrodes are arranged in the inner cavity of the fixing box, and two fixing holes respectively matching the positive and negative poles are opened on the bottom plate of the fixing box. The positive and negative poles pass through the corresponding through holes and fixing holes in sequence and extend to the inner cavity of the fixing box, and the positive pole is in contact with one electrode sheet, and the negative pole is in contact with the other electrode sheet.

[0008] Furthermore, the electrode is in a comb-teeth shape, and includes a vertical plate electrode piece and a plurality of vertical plate electrode pieces vertically and evenly arranged on the vertical plate electrode piece to increase the contact area between the electrode and the hydrogen storage material.

[0009] Furthermore, the vertical plate pole pieces of the two electrodes are arranged in a staggered manner, and an insulating fixing block is provided between the vertical plate pole piece of one electrode and the vertical plate pole piece of the other electrode.

[0010] Furthermore, the insulating fixing block is a U-shaped insulating fixing block, which is convenient for installation and can effectively ensure the insulation between the electrodes.

[0011] Furthermore, the U-shaped insulating fixing block is inserted into the vertical plate of the pole piece to fix the electrode to prevent it from moving or deforming.

[0012] Furthermore, the thermocouple is located at the center of the tank cover to accurately reflect the temperature inside the tank body and avoid the influence of local temperature differences on the test results.

[0013] Given that different materials require different electric field strengths to reduce the energy barrier of hydrogen absorption reaction under the action of electric field, the distance d between the positive and negative plates and the applied voltage U can be designed and regulated according to E=U / d to obtain the expected electric field strength E. Since the electric field strength is negatively correlated with the Gibbs free energy corresponding to the hydrogen absorption reaction, the amount of hydrogen absorption and desorption can be controlled by adjusting the distance d between the positive and negative plates and the voltage. For example, if the sample needs to be applied 10 5 The electric field strength of the order of V / m can effectively reduce the relative Gibbs free energy of hydrogen absorption reaction. 2V)d, the distance between the positive and negative plates d = 1mm and below can achieve the expected electric field strength. At this time, the voltage is 100V, and the effect of the electric field disturbance can effectively reduce the energy barrier of the hydrogen absorption reaction so that the material can spontaneously absorb hydrogen. At this time, the larger the electric field magnitude, the easier it is to spontaneously absorb hydrogen; when the electric field strength is weakened by a lower magnitude, the energy barrier of the hydrogen absorption reaction becomes higher, and it is impossible to spontaneously absorb hydrogen, thereby releasing part of the previously captured hydrogen under external pressure conditions. Given that the hydrogen storage capacity and sensitivity to the electric field strength of each electrically controllable hydrogen storage material (its hydrogen absorption Gibbs free energy is inconsistent) are inconsistent, the effective voltage range of the material can be explored by adjusting the voltage and matching the distance d between the positive and negative plates. Finally, the commonly used ideal gas equation PV = nRT is used to calculate the amount of hydrogen absorbed and released, and the pressure and temperature conditions when the data is recorded and the known container volume are used to calculate the amount of hydrogen absorbed and released.

[0014] Beneficial effects of the utility model:

[0015] Reasonable structure, easy detection and operation. The device uses comb-shaped electrodes as positive and negative electrodes, and the vertical plates of the positive and negative electrodes are arranged in an alternating manner, installed in a fixed box, and filled with hydrogen storage materials, which increases the contact area between the electrode and the hydrogen storage material, and improves the uniformity and efficiency of the electric field. The material storage trough box is installed in a pluggable manner, which is convenient for separate cleaning and maintenance of the material storage trough box, and increases the service life of the device. At the same time, different types of electrodes can be quickly replaced, which greatly increases the flexibility and adaptability of the device. It can also meet the different requirements of different hydrogen storage materials for electric field strength by replacing electrodes with different tooth spacings, so that the device is suitable for different hydrogen storage materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the utility model;

[0017] Figure 2 yes Figure 1 A partial cross-sectional view of

[0018] Figure 3 yes Figure 1 A three-dimensional diagram of the positive and negative electrodes.

[0019] In the figure: 1-tank body, 2-tank cover, 201 air inlet, 202-through hole, 3-inlet valve, 4-thermocouple, 5-positive electrode connecting post, 6-negative electrode connecting post, 7-fixing box, 701-fixing hole, 8-electrode, 801-vertical plate electrode piece, 802-vertical plate electrode piece, 9-insulating fixing block. DETAILED DESCRIPTION

[0020] like Figure 1-3As shown, a hydrogen storage test device for field force disturbance high-flux hydrogen storage materials comprises a tank body 1 and a tank cover 2 fixedly installed by bolts, a sealing gasket is arranged between the tank body 1 and the tank cover 2, an air inlet 201 is opened on the tank cover 2, and an air inlet valve 3 is installed on the air inlet 201; a thermocouple 4 is installed at the center position of the upper surface of the tank cover 2, and the temperature measuring end of the thermocouple 4 passes through the tank cover 2 and extends to the tank body 1;

[0021] Two through holes 202 for installing the positive pole 5 and the negative pole 6 are arranged at the bottom of the tank body 1, and a fixing box 7 made of PTFE material is arranged in the inner cavity of the tank body 1. Two comb-shaped electrodes 8 are arranged in the inner cavity of the fixing box 7, and the electrode 8 includes a vertical plate pole piece 801 and a plurality of vertical plate pole pieces 802 vertically and evenly arranged on the vertical plate pole piece 801; the vertical plate pole pieces 802 of the two electrodes are arranged in a staggered manner, and a U-shaped insulating fixing block 9 is arranged between the vertical plate pole piece 802 of one electrode and the vertical plate pole piece 801 of the other electrode to ensure the insulation between the two electrodes, and the U-shaped insulating fixing block 9 is inserted on the vertical plate pole piece 802 of the pole piece to fix the two electrodes to prevent them from moving or deforming; the two electrodes are respectively the positive electrode and the negative electrode;

[0022] Two fixing holes 701 respectively matching with the positive electrode connection post 5 and the negative electrode connection post 6 are provided on the bottom plate of the fixing box 7. The positive electrode connection post 5 and the negative electrode connection post 6 respectively pass through the corresponding through hole 202 and the fixing hole 701 in sequence and extend to the inner cavity of the fixing box 7, and the positive electrode connection post 5 abuts against the positive electrode, and the negative electrode connection post 6 abuts against the negative electrode.

[0023] When it is necessary to measure the hydrogen absorption and desorption performance of a sample, comb-shaped electrode plates 802 with appropriate tooth pitches are arranged in an interleaved manner. (Taking the distance d between adjacent vertical plate electrodes of the positive and negative electrodes in this embodiment as 1 mm as an example), the U-shaped insulating fixing block 9 is inserted onto the vertical plate electrode 802 to fix the distance between adjacent vertical plate electrodes of the positive and negative electrodes. The positive and negative electrodes are placed into the inner cavity of the fixing box 7. A sample to be measured of the hydrogen storage material is placed into the long strip grooves formed by the interleaving of the vertical plate electrodes of the positive electrode and the vertical plate electrodes of the negative electrode. The positive electrode connection post 5 and the negative electrode connection post 6 (composed of an outer PTFE insulating material and an inner copper cylinder) pass through the through hole 202 of the tank body 1 and extend into the interior of the tank body. The two fixing holes 701 of the fixing box 7 are respectively inserted onto the positive electrode connection post 5 and the negative electrode connection post 6 to fixedly install the fixing box 7 inside the tank body 1. A sealing gasket is placed between the tank body 1 and the tank cover 2, and bolts are used to fixedly install the tank body 1 and the tank cover 2 together. A final inspection of the entire device is carried out to ensure that all components are correctly installed, firmly fixed, and the sealing performance and electrical connection are checked to complete the assembly. At this time, the programmable power supply connecting the thermocouple 4 and the wires of the positive electrode connection post 5 and the negative electrode connection post 6 is powered on. The intake valve 3 is opened, and hydrogen is fed into the interior of the tank body 1 through the hydrogen supply pipe connected to the intake valve 3. The pressure P inside the tank body 1 is measured by a pressure gauge, and the temperature T inside the sample tube is measured by the thermocouple 4. The control of the hydrogen absorption and desorption amount is achieved by adjusting the voltage magnitude V input / output to the positive electrode connection post 5 and the negative electrode connection post 6 through the programmable power supply. At the same time, a computer is used to record in real time the pressure data P, the temperature data T inside the tank body 1, and the voltage magnitude V input / output to the positive electrode connection post 5 and the negative electrode connection post 6. Using the analysis module of the temperature-programmed desorption instrument of Zhejiang University, the hydrogen absorption / desorption amount value is output.

[0024] The above are only specific embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, various modifications and changes can be made to the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A hydrogen storage test device for a field force disturbance high-throughput hydrogen storage material, comprising a tank body and a tank cover, a sealing gasket is arranged between the tank body and the tank cover, and the tank body and the tank cover are fixedly connected by bolts, wherein: The tank cover is provided with an air inlet, and an air inlet valve is installed on the air inlet; a thermocouple is installed on the upper surface of the tank cover, and the temperature measuring end of the thermocouple passes through the tank cover and extends to the tank body; Two through holes for installing the positive and negative poles are provided at the bottom of the tank body, a fixing box is provided in the inner cavity of the tank body, two electrodes are provided in the inner cavity of the fixing box, and two fixing holes respectively matched with the positive and negative poles are provided on the bottom plate of the fixing box. The positive and negative poles pass through the corresponding through holes and fixing holes in sequence and extend to the inner cavity of the fixing box, and the positive pole is in contact with one electrode sheet, and the negative pole is in contact with the other electrode sheet.

2. The hydrogen storage testing device for field force disturbance high-throughput hydrogen storage materials according to claim 1, characterized in that: The electrode is in a comb-tooth shape and includes a vertical plate electrode and a plurality of vertical plate electrode pieces vertically and evenly arranged on the vertical plate electrode piece.

3. The hydrogen storage testing device for field force disturbance high-throughput hydrogen storage materials according to claim 1, characterized in that: The vertical plate pole pieces of the two electrodes are arranged in a staggered manner, and an insulating fixing block is arranged between the vertical plate pole piece of one electrode and the vertical plate pole piece of the other electrode.

4. The hydrogen storage testing device for field force disturbance high-throughput hydrogen storage materials according to claim 3, characterized in that: The insulating fixing block is a U-shaped insulating fixing block.

5. The hydrogen storage testing device for field force disturbance high-throughput hydrogen storage materials according to claim 4, characterized in that: The U-shaped insulating fixing block is inserted on the vertical plate of the pole piece.

6. The hydrogen storage testing device for field force disturbance high-throughput hydrogen storage materials according to claim 1, characterized in that: The thermocouple is located at the center of the tank cover.

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