CN114023975B - Magnesium diboride anode electrode plate of air fuel cell, application of magnesium diboride anode electrode plate and air fuel cell - Google Patents
Magnesium diboride anode electrode plate of air fuel cell, application of magnesium diboride anode electrode plate and air fuel cell Download PDFInfo
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Abstract
The invention provides a magnesium diboride anode electrode plate of an air fuel cell, application thereof and an air fuel cell, and belongs to the technical field of fuel cells. The magnesium diboride air fuel cell anode electrode plate is obtained by mixing magnesium diboride powder and copper powder and then twisting the mixture at high pressure. The magnesium diboride anode electrode plate of the air fuel cell provided by the invention has high capacity density and anode efficiency, and the variety of the air fuel cell anode electrode plate is further expanded.
Description
Technical Field
The invention relates to the technical field of air fuel cells, in particular to a magnesium diboride anode electrode plate of an air fuel cell, application of the magnesium diboride anode electrode plate and the air fuel cell.
Background
With the progressive exhaustion of non-renewable energy sources, energy problems have become an important issue for humans. And the fuel cell has become one of research hotspots in the field of new energy development as a new energy technology with high efficiency, cleanliness and safety. The metal air battery fully plays the advantages of the fuel battery, has high specific energy, simple structure and stable discharge voltage, and is an emerging green energy source with development and application prospects in the future. The metal-air battery takes active metal as a negative electrode, oxygen in air is taken as a positive electrode, and the oxygen reaches a gas-liquid-solid three-phase interface through a gas diffusion electrode to react with the metal negative electrode so as to release electric energy. Compared with the existing lead-acid, nickel-hydrogen and lithium ion batteries, the metal-air battery can achieve higher energy density and specific capacity, and has higher safety.
At the end of the last century, steven Amendola et al, U.S. proposed a high energy battery system with boride as electrode material, VB 2 The electron oxidation reaction can occur in the alkaline solution, the theoretical specific discharge capacity is 4060mAh/g, and is almost the theoretical specific discharge capacity of a zinc-air battery (820 mA.h.g -1 ) The energy density is 32000Wh/L (6270 Wh/kg), which is the highest level of the discharge performance of the metal compound in the current aqueous solution system. In order to expand the variety of metal boride used in anode electrode plates of air fuel cells, chinese patent CN108550961a discloses an anode electrode plate of air fuel cells comprising metal boride powder which is titanium diboride powder, molybdenum diboride powder or magnesium diboride powder, and nickel powder, wherein the metal boride powder has the highest volume density (3116ma·h·g when being magnesium diboride powder -1 ) And anode efficiency (66)31%). Currently, there is a need to further expand boron-containing compounds having high capacity density and anode efficiency as anodes for air fuel cells.
Disclosure of Invention
The invention aims to provide a magnesium diboride air fuel cell anode electrode plate, application thereof and an air fuel cell.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides a magnesium diboride air fuel cell anode electrode slice which is obtained by mixing magnesium diboride powder and copper powder and then twisting the mixture at high pressure.
Preferably, the molar ratio of the magnesium diboride powder to the copper powder is 1.9-2.8:1.
Preferably, the particle size of the copper powder is 300-350 mesh.
Preferably, the particle size of the magnesium diboride powder is 300 to 350 mesh.
Preferably, the pressure of the high-pressure torsion device is 10-30T during the pressing, and the pressing is 2-10 times.
Preferably, the preparation method of the magnesium diboride powder comprises the following steps: and carrying out self-propagating high-temperature synthesis reaction on Ti, C, mg and B under the protection of argon to obtain magnesium diboride powder.
Preferably, the ratio of the total mass of Ti and C to the total mass of Mg and B is 1:1; the molar ratio of Mg to B is 1:2-3; the molar ratio of Ti to C is 1:1.
Preferably, the diameter of the anode electrode plate of the magnesium diboride air fuel cell is 20mm, and the thickness is 1.5-2.0 mm.
The invention provides application of the magnesium diboride air fuel cell anode electrode plate in an air fuel cell.
The invention provides an air fuel cell, which comprises the magnesium diboride air fuel cell anode electrode plate, a cathode and an electrolyte; the cathode comprises an air diffusion layer, a current collector and a catalytic layer, and the electrolyte is aqueous potassium hydroxide solution.
The invention provides a magnesium diboride air fuel cell anode electrode slice which is obtained by mixing magnesium diboride powder and copper powder and then twisting the mixture at high pressure. According to the invention, copper powder is added into magnesium diboride, and the copper powder has higher conductivity, so that the reaction speed of active substances and electrolyte is increased, and the electrode utilization rate is improved. In addition, the copper powder and the magnesium diboride react exothermically during the high-pressure torsion process, mgB 2 The self-sintering is aggravated, because of the existence of Cu, the Mg-Cu low-temperature phase is formed, the cooling effect can be realized, and the impurity MgB in the magnesium diboride powder can be promoted 4 Decomposing to generate MgB 2 MgB is improved 2 And thus increases the battery capacity and increases the battery current density.
Drawings
FIG. 1 is an X-ray diffraction pattern of a magnesium diboride powder prepared by a self-propagating process according to the present invention;
FIG. 2 is a polarization curve of an anode electrode sheet of a magnesium diboride air fuel cell according to example 1 of the present invention;
FIG. 3 is a graph showing that the battery of example 1 of the present invention was at 2.5 mA.cm -2 Constant current discharge test curve under current density;
FIG. 4 shows the battery of example 1 of the present invention at 5mA cm -2 Constant current discharge test curve under current density;
FIG. 5 shows a battery of example 1 of the present invention at 10mA cm -2 Constant current discharge test curve under current density;
FIG. 6 shows a battery of example 1 of the present invention at 15mA cm -2 Constant current discharge test curve under current density;
FIG. 7 is a graph showing that the battery of example 1 of the present invention was at 20 mA.cm -2 Constant current discharge test curve under current density;
FIG. 8 is a graph showing that the battery of example 1 of the present invention was at 25 mA.cm -2 Constant current discharge test curve under current density;
fig. 9 is a graph showing the current density versus capacity density of the battery of example 1 of the present invention.
Detailed Description
The invention provides a magnesium diboride air fuel cell anode electrode slice which is obtained by mixing magnesium diboride powder and copper powder and then twisting the mixture at high pressure.
In the present invention, the magnesium diboride powder is preferably prepared by a self-propagating high temperature synthesis reaction, and the preparation method of the magnesium diboride powder preferably comprises: and (3) carrying out self-propagating high-temperature synthesis reaction on Ti, C, mg and B under the protection of argon, and separating TiC to obtain magnesium diboride powder. In the present invention, the Ti and C serve as a heat supplementing agent. In the present invention, the ratio of the total mass of Ti and C to the total mass of Mg and B is preferably 1:1; the molar ratio of Mg to B is preferably 1:2-3; the molar ratio of Ti to C is preferably 1:1. In the present invention, the purity of Ti, C, mg and B is preferably more than 98%. The invention preferably adopts electric spark ignition, ti, C, mg and B rapidly generate violent combustion reaction, and the reaction is completed instantaneously, and the magnesium diboride powder can be obtained without external heating. In the self-propagating high-temperature synthesis reaction process, C and Ti react to generate TiC, and Mg and B react to generate MgB 2 Wherein the reaction of titanium and carbon is exothermic, supplementing the heat required for the reaction of magnesium and boron. Because TiC density was 4.9g/cm 3 ，MgB 2 Density of 2.6g/cm 3 The present invention preferably employs a density separation process such as a centrifugal concentrator to separate TiC. The invention prepares magnesium diboride powder by utilizing self-propagating high-temperature synthesis reaction, and the obtained powder is mainly MgB 2 Phases, additionally having small amounts of MgO phase and MgB phase 4 And (3) phase (C). MgB (MgB) 2 The purity reaches 98 percent.
In the present invention, the particle size of the magnesium diboride is preferably 300 to 350 mesh, more preferably 320 to 340 mesh. In the present invention, the particle size of the copper powder is preferably 300 to 350 mesh, more preferably 320 to 340 mesh. The invention is beneficial to high-pressure torsion by controlling the particle sizes of the magnesium diboride powder and the copper powder in the range.
In the present invention, the molar ratio of the magnesium diboride powder to the copper powder is preferably 1.9 to 2.8:1, and may be specifically 2.5:1, 1.9:1 or 2.8:1. The invention can ensure that the magnesium diboride has good discharge effect by controlling the mol ratio of the magnesium diboride powder to the copper powder in the range.
In the present invention, the magnesium diboride powder and copper powder are preferably mixed by ball milling, and the present invention preferably performs mixing on a ceramic ball mill. The invention has no special requirement on the mixing condition, and can uniformly mix the magnesium diboride and the copper powder.
The invention has no special requirement on the equipment adopted by the high-voltage torsion, and the equipment is adopted by the high-voltage torsion equipment common in the field. In the present invention, the pressure of the high-pressure torsion device is preferably 10 to 30T, more preferably 15 to 25T; in the present invention, T represents ton. In the present invention, the number of revolutions of the high-voltage twisting apparatus is preferably 2 to 10 revolutions, more preferably 5 to 8 revolutions, and most preferably 20T high-voltage twisting 7 revolutions. In the present invention, the rotation speed of the high-pressure torsion is preferably 2 to 5 rpm, more preferably 3 rpm.
In the high-pressure torsion process, mgB 2 The self-sintering is aggravated, because of the existence of Cu, the Mg-Cu low-temperature phase is formed, the cooling effect can be realized, and the impurity MgB in the magnesium diboride powder can be promoted 4 Decomposing to generate MgB 2 MgB is improved 2 And thus increases the battery capacity and increases the battery current density. The invention can indirectly control the heat of reaction by controlling the high-pressure torsion condition, thereby being beneficial to obtaining MgB with fine grains 2 The capacity and current density of the battery are further improved. In the invention, the grain size of the magnesium diboride air fuel cell anode electrode slice is preferably 50-100 nm.
In the invention, the diameter of the anode electrode plate of the magnesium diboride air fuel cell is preferably 20mm, and the thickness is preferably 1.5-2.0 mm.
The invention provides application of the magnesium diboride air fuel cell anode electrode plate in an air fuel cell.
The invention provides an air fuel cell, which comprises the magnesium diboride air fuel cell anode electrode plate, a cathode and an electrolyte; the cathode comprises an air diffusion layer, a current collector and a catalytic layer, and the electrolyte is aqueous potassium hydroxide solution.
In the present invention, the air diffusion layer preferably comprises PTFE and activated carbon, the current collector is preferably a copper mesh, and the catalyst is preferably MnO 2 . In the present invention, the cathode is preferably a commercially available electrode. In the present invention, the concentration of the aqueous potassium hydroxide solution is preferably 6mol/L.
The method for preparing the magnesium diboride air fuel cell is not particularly limited, and the method for preparing the air fuel cell well known to those skilled in the art can be adopted.
The magnesium diboride air fuel cell anode electrode sheet, the application thereof and the air fuel cell provided by the invention are described in detail below with reference to examples, but they should not be construed as limiting the scope of the invention.
MgB used in the following examples and comparative examples 2 The preparation process of (2) is as follows:
the weight ratio of the selected heat-supplementing agent to the reactant is 1:1, i.e., (Ti+C): (mg+b) =1: 1, wherein Ti, C, mg and B are 98% pure; carrying out self-propagating high-temperature synthesis reaction under the protection of argon gas, removing TiC to obtain dark brown powder, and XRD analysis spectrum of the obtained powder is shown in figure 1, wherein the obtained powder is mainly MgB 2 Phases, in addition, there is a small amount of MgO phase, a small amount of MgB 4 Not analyzed, mgB 2 The purity reaches 98 percent.
Example 1
MgB 2 Powder (300 meshes) and copper powder (300 meshes) according to a molar ratio of 2.5:1, uniformly mixing the materials for 1 hour on a ceramic ball mill, then twisting the materials for 7 turns at 20T by a high-pressure twisting device, wherein the rotating speed is 3 turns/min, and pressing the materials into a wafer with the diameter of 20mm and the thickness of 1.5mm to obtain the magnesium diboride air fuel cell anode electrode plate.
Electrochemical testing of electrode plates was performed using a standard three electrode system, the main test content being the electrokinetic polarization curve (Tafel). The anode electrode plate of the magnesium diboride air fuel cell is used as a working electrode (the contact area with the electrolyte is 1 cm) 2 ) The counter electrode is a platinum electrode (area is 20mm multiplied by 20 mm), the reference electrode is Hg/HgO electrode, and the electrolyte is 6mAn ol/L KOH solution. After 0.5h of the electrolytic cell system, the open circuit voltage (OCP) of the electrode plate reaches a stable state, and Tafel is 0.5 mV.s -1 Is tested at a scan rate ranging from-1.0V to +1.5V relative to OCP. The Reference 3000 electrochemical workstation of Gamry corporation of America was used, and the result was shown in FIG. 2, and it can be seen from FIG. 2 that the corrosion current was 1.11×10 -2 A·cm -2 The corresponding corrosion voltage was-0.985V.
The battery performance test is carried out by adopting a die battery, and a LANHE CT2001A type battery charge-discharge tester of the Wuhan Land company is used, wherein the battery comprises three parts: an anode, an electrolyte, and a cathode. The anode is the magnesium diboride electrode slice prepared in the example 1, the electrolyte is a KOH aqueous solution of 6mol/L, and the cathode is self-made and comprises an air diffusion layer, a current collector and a catalytic layer. The main components of the air diffusion layer are PTFE and active carbon, the current collector is a copper mesh, and the catalyst is MnO 2 . The battery test adopts constant current discharge test under different current densities, and the discharge current densities are as follows in sequence: 2.5 mA.cm -2 、5mA·cm -2 、10mA·cm -2 、15mA·cm -2 、20mA·cm -2 And 25mA cm -2 The test device is used for testing the performance of the battery in the long-time continuous discharge of small current and the short-time high-power discharge of large current. The discharge capacity was 100mAh, the cutoff voltage was 0.3V, the test results were shown in FIGS. 3 to 9, and FIG. 3 was a graph of 2.5 mA.cm -2 As can be seen from FIG. 3, the discharge curve of the battery shows two discharge plateaus, the first plateau voltage is about 0.90V, the second plateau voltage is about 0.79V, the discharge level of the battery is 0.7938V, and the capacity density is 1283.2 mA.h.g -1 The electrode efficiency was 27.18%, and the power density was 2.480 mW.cm -2 . FIG. 4 is a graph of 5mA cm -2 As can be seen from FIG. 4, the discharge curve of the battery shows two discharge plateaus, the first plateau voltage is about 0.88V, the second plateau voltage is about 0.77V, the discharge level of the battery is 0.7683V, and the capacity density is 1863.5 mA.h.g -1 The electrode efficiency was 39.52% and the power density was 4.217mW cm -2 . FIG. 5 is a graph of 10mA cm -2 As can be seen from FIG. 5, the discharge curve of the battery shows two discharge plateaus, the first plateau voltage is about 0.83V, the second plateau voltage is about 0.69V, the discharge level of the battery is 0.6902V, and the capacity density is 2537.6 mA.h.g -1 The electrode efficiency was 54.87%, and the power density was 7.002 mW.cm -2 . FIG. 6 is a graph of 15 mA.cm -2 As can be seen from FIG. 6, the discharge curve of the battery shows two discharge plateaus, the first plateau voltage is about 0.78V, the second plateau voltage is about 0.76V, the discharge level of the battery is 0.6760V, and the capacity density is 3266.4 mA.h.g -1 The electrode efficiency was 76.31% and the power density was 12.14mW cm -2 . FIG. 7 is a graph of 20 mA.cm -2 As can be seen from FIG. 7, the discharge curve of the battery shows two discharge plateaus, the first plateau voltage is about 0.75V, the second plateau voltage is about 0.62V, the discharge level of the battery is 0.6329V, and the capacity density is 2836.0 mA.h.g -1 The electrode efficiency was 59.22% and the power density was 13.458mW cm -2 . FIG. 8 is a graph of 25mA cm -2 As can be seen from FIG. 8, the discharge curve of the battery shows two discharge plateaus, the first plateau voltage is about 0.73V, the second plateau voltage is about 0.62V, the discharge level of the battery is 0.6262V, and the capacity density is 2749.3 mA.h.g -1 The electrode efficiency was 58.37% and the power density was 19.905mW cm -2 。
As shown in FIG. 9, the current density and capacity density of the battery are shown in FIG. 9, and it can be seen from FIG. 9 that the battery is in the range of 2.5 to 25 mA.cm -2 When the discharge is performed within the current density range of (2), the capacity density is increased and then decreased with the increase of the current density, and the current density is 15mA cm -2 Maximum is 3266.4 mA.h.g -1 . The battery exhibits two voltage plateaus upon discharge, and the ratio of the charge levels of the two plateaus is approximately 3:18.
higher electrode efficiency benefits from useThe copper powder is used as the conductive agent and the nano-scale particle size (50-100 nm) of the electrode plate prepared from the powder has higher conductivity, which is beneficial to increasing the reaction speed of the active substance and the electrolyte, thereby improving the utilization rate of the electrode. MgB (MgB) 2 Has a higher discharge voltage, but the electrode efficiency decreases with increasing discharge current due to the strong polarization effect of the electrode discharge at high current densities.
Example 2
Homemade MgB 2 Powder (300 meshes) and copper powder (300 meshes) are mixed according to a molar ratio of 1.9:1, uniformly mixing the materials for 1 hour on a ceramic ball mill, and then pressing the materials into a wafer with the diameter of 20mm and the thickness of 2.0mm at 10T and the rotating speed of 5 revolutions per minute by using a high-pressure torsion device to obtain the magnesium diboride air fuel cell anode electrode plate.
The assembled battery was subjected to electrochemical performance test (same as in example 1). The battery test adopts constant current discharge test under different current densities, and the discharge current density is 15mA cm -2 The discharge performance of the battery was tested. The discharge capacity was 100mAh, the cutoff voltage was 0.3V, and the discharge capacity was 15mA cm -2 The discharge curve of the battery shows two discharge platforms, the first platform voltage is about 0.76V, the second platform voltage is about 0.70V, the discharge level of the battery is equal to 0.6560V, and the capacity density is 3101.4 mA.h.g -1 The electrode efficiency was 66.31% and the power density was 10.14mW cm -2 。
Example 3
Homemade MgB 2 Powder (300 meshes) and copper powder (300 meshes) according to a molar ratio of 2.8:1, uniformly mixing the materials for 1 hour on a ceramic ball mill, and then pressing the materials into a wafer with the diameter of 20mm and the thickness of 2.0mm at 30T and the rotating speed of 5 revolutions per minute by using a high-pressure torsion device to obtain the magnesium diboride air fuel cell anode electrode plate.
The assembled battery was subjected to electrochemical performance test (same as in example 1). The battery test adopts constant current discharge test under different current densities, and the discharge current density is 15mA cm -2 The discharge performance of the battery was tested. The discharge capacity was 100mAh, and the cutoff voltage was 0.3V. At 15 mA.cm -2 The discharge curve of the battery shows two discharge platforms, the first platform voltage is about 0.74V, the second platform voltage is about 0.72V, the discharge level of the battery is equal to 0.6660V, and the capacity density is 3111.4 mA.h.g -1 The electrode efficiency was 68.31% and the power density was 11.14mW cm -2 。
Comparative example 1
The difference from example 1 is that the copper powder is replaced by nickel powder. Specific:
MgB 2 powder (300 meshes) and nickel powder (300 meshes) are mixed according to a molar ratio of 2.5:1, uniformly mixing and grinding, and pressing into a wafer with the diameter of 15mm and the thickness of 1.0mm by a high-pressure torsion tablet machine to obtain the anode electrode plate of the air fuel cell.
The assembled battery was subjected to electrochemical performance testing (same as in example 1), using constant current discharge testing at different current densities, with the discharge current densities in order: 2.5 mA.cm -2 、5mA·cm -2 、10mA·cm -2 、15mA·cm -2 、20mA·cm -2 And 25mA cm -2 The test device is used for testing the performance of the battery in the long-time continuous discharge of small current and the short-time high-power discharge of large current. The discharge capacity was 100mAh, and the cutoff voltage was 0.3V. At 2.5 mA.cm -2 The experimental result of discharging the current density of the battery shows that the discharge curve of the battery shows two discharge platforms, the voltage of the first platform is about 0.86V, the voltage of the second discharge platform is about 0.74V, the discharge level voltage of the battery is 0.7418V, and the capacity density is 1083.2 mA.h.g -1 The electrode efficiency was 20.18%, and the power density was 1.280 mW.cm -2 . At 5 mA.cm -2 The experimental result of discharging the current density of the battery shows that the discharge curve of the battery shows two discharge platforms, the voltage of the first platform is about 0.67V, the voltage of the second discharge platform is about 0.66V, the discharge level voltage of the battery is 0.6633V, and the capacity density is 1563.5 mA.h.g -1 The electrode efficiency was 35.52% and the power density was 3.017mW cm -2 . At 10 mA.cm -2 As a result of the experiment in which the current density of the battery was discharged, two discharge plateaus appear in the discharge curve of the battery,the first stage voltage is about 0.73V, the second stage voltage is about 0.64V, the discharge level voltage of the battery is 0.6402V, and the capacity density is 2127.6 mA.h.g -1 The electrode efficiency was 49.87%, and the power density was 5.902 mW.cm -2 . At 15 mA.cm -2 The discharge curve of the battery shows two discharge platforms, the first platform voltage is about 0.58V, the second platform voltage is about 0.56V, the discharge level voltage of the battery is 0.5660V, and the capacity density is 2816.4 mA.h.g -1 The electrode efficiency was 56.31% and the power density was 9.14mW cm -2 . At 20 mA.cm -2 The discharge curve of the battery shows two discharge platforms, the first platform voltage is about 0.45V, the second platform voltage is about 0.40V, the discharge level voltage of the battery is 0.4529V, and the capacity density is 2536.0 mA.h.g -1 The electrode efficiency was 50.22%, and the power density was 11.458 mW.cm -2 . At 25 mA.cm -2 The discharge curve of the battery shows two discharge platforms, the first platform voltage is about 0.42V, the second platform voltage is about 0.48V, the discharge level voltage of the battery is 0.4862V, and the capacity density is 2049.3 mA.h.g -1 The electrode efficiency was 50.37% and the power density was 14.905mW cm -2 . As can be seen from the current density and the capacity density of the battery, the battery is between 2.5 and 25 mA.cm -2 When the discharge is performed within the current density range of (2), the capacity density is increased and then decreased with the increase of the current density, and the current density is 15mA cm -2 Maximum is 2816.4 mA.h.g -1 。
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.
Claims (8)
1. The magnesium diboride air fuel cell anode electrode plate is characterized in that the anode electrode plate is obtained by mixing magnesium diboride powder and copper powder and then twisting the mixture at high pressure; the preparation method of the magnesium diboride powder comprises the following steps: carrying out self-propagating high-temperature synthesis reaction on Ti, C, mg and B under the protection of argon to obtain magnesium diboride powder; the ratio of the total mass of Ti and C to the total mass of Mg and B is 1:1; the molar ratio of Mg to B is 1:2-3; the molar ratio of Ti to C is 1:1.
2. The magnesium diboride air fuel cell anode electrode sheet of claim 1, wherein the molar ratio of magnesium diboride powder to copper powder is from 1.9 to 2.8:1.
3. The magnesium diboride air fuel cell anode electrode sheet of claim 1 wherein the copper powder has a particle size of 300 to 350 mesh.
4. The magnesium diboride air fuel cell anode electrode sheet of claim 1, wherein the magnesium diboride powder has a particle size of 300 to 350 mesh.
5. The magnesium diboride air fuel cell anode electrode sheet of claim 1, wherein the pressure of the high voltage twisting device is 10 to 30T and the number of revolutions of the high voltage twisting is 2 to 10 revolutions.
6. The magnesium diboride air fuel cell anode electrode sheet of claim 1, wherein the magnesium diboride air fuel cell anode electrode sheet has a diameter of 20mm and a thickness of 1.5-2.0 mm.
7. Use of the magnesium diboride air fuel cell anode electrode sheet of any one of claims 1 to 6 in an air fuel cell.
8. An air fuel cell, characterized by comprising the magnesium diboride air fuel cell anode electrode sheet, cathode and electrolyte of any one of claims 1 to 6; the cathode comprises an air diffusion layer, a current collector and a catalytic layer, and the electrolyte is aqueous potassium hydroxide solution.
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| JP5755624B2 (en) * | 2012-10-15 | 2015-07-29 | トヨタ自動車株式会社 | Air electrode for air battery and air battery |
| CN108550961A (en) * | 2018-06-15 | 2018-09-18 | 北京航空航天大学 | A kind of air-fuel battery anode electrode film and preparation method thereof, a kind of air-fuel battery |
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