CN109980322B - Ultrasonic-assisted metal-air battery working method and system - Google Patents
Ultrasonic-assisted metal-air battery working method and system Download PDFInfo
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- CN109980322B CN109980322B CN201910322642.6A CN201910322642A CN109980322B CN 109980322 B CN109980322 B CN 109980322B CN 201910322642 A CN201910322642 A CN 201910322642A CN 109980322 B CN109980322 B CN 109980322B
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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
- H01M12/00—Hybrid cells; Manufacture thereof
- H01M12/04—Hybrid cells; Manufacture thereof composed of a half-cell of the fuel-cell type and of a half-cell of the primary-cell type
- H01M12/06—Hybrid cells; Manufacture thereof composed of a half-cell of the fuel-cell type and of a half-cell of the primary-cell type with one metallic and one gaseous electrode
Abstract
The invention discloses a method and a device for improving the output power of a metal-air battery. The related battery system comprises an ultrasonic transducer, a transducer driving circuit, an air electrode, an electrolyte and a metal anode, and is characterized in that ultrasonic waves generated by the ultrasonic transducer at a cathode oxygen reduction reaction position of the metal-air battery are utilized to drive more oxygen molecules to the cathode oxygen reduction reaction position, so that the discharge current and the output power of the metal-air battery are increased.
Description
Technical Field
The invention relates to a working method and a working system of an ultrasonic-assisted metal-air battery, belonging to the crossing field of ultrasonic engineering and energy engineering.
Background
Since the metal-air battery enters the visual field of people, the metal-air battery has the characteristics of high energy density and capacity, stable discharge characteristic, low dependence on load and temperature, lower manufacturing cost and the like, and has greater application potential in electric vehicles, military communication equipment, portable equipment, unmanned aerial vehicles, submarines, surface ships, spacecrafts and the like, so that the metal-air battery is receiving more and more attention. Although metal-air batteries have high energy density (or specific energy), their slow oxygen reduction reaction has become a bottleneck limiting their further development. This is because the slow oxygen reduction reaction limits the output current of the metal-air battery, which in turn limits its output power density. The current research direction mainly focuses on the development of novel high-efficiency cathode catalytic materials and the structural design of the battery.
The invention provides an ultrasonic-assisted working method and system of a metal-air battery, which is a brand-new catalytic method of air cathode oxidation-reduction reaction, and utilizes the catalytic effect of ultrasonic waves on the oxygen reduction reaction at the interface of air-alkali solution-catalyst, thereby improving the discharge current density and output power of the metal-air battery.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a working method and a working system of an ultrasonic-assisted metal-air battery, so as to achieve the technical effect of improving the output power of the metal-air battery.
In order to achieve the purpose, the invention adopts the following technical scheme:
the working method of the ultrasonic-assisted metal-air battery is characterized in that: the ultrasonic transducer is driven by the transducer driving circuit, sound pressure is generated at the junction of the air electrode and air and electrolyte, oxygen in the air, electrons in the electrolyte and oxygen reduction reaction of water molecules at the air electrode are catalyzed by the sound pressure, and then the output current and the output electric power of the metal-air battery system are improved.
The invention also provides a system using the ultrasonic-assisted metal-air battery working method, which is characterized in that: the air electrode is partially exposed in the air and is contacted with the air, the other part of the air electrode is contacted with the surface of the electrolyte, the metal electrode plate is completely or partially immersed in the electrolyte, and the transducer driving circuit can drive the ultrasonic transducer to generate sound pressure to act on the junction of the air electrode, the air and the electrolyte.
Furthermore, the radiation surface of the ultrasonic transducer is a concave surface, the generated working sound field is a focusing sound field or a quasi-focusing sound field, the working frequency range is 0.01Hz-10GHz, and the focus area of the sound field covers the whole or part of the surface of the air electrode.
Further, the size range of the air electrode is 1-100mm2*0.5-10mm。
Furthermore, the radiation surface of the ultrasonic transducer is a plane, the generated working sound field is a standing wave sound field or a traveling wave sound field, the working frequency range is 0.01Hz-10GHz, and the focal region of the sound field covers the whole or part of the surface of the air electrode.
Further, the working voltage of the transducer driving circuit comes from the battery system.
Further, the working voltage of the transducer driving circuit comes from an external power supply system.
Further, the metal-air battery system comprises a metal-air solid-state battery system or a metal-air flow battery system.
Further, the metal-air battery system comprises a metal-air solid battery or a metal-air flow battery.
Compared with the prior art, the invention has the beneficial effects that:
1. the system utilizes ultrasonic waves generated by various ultrasonic transducers at the cathode oxygen reduction reaction position of the metal-air battery to drive oxygen molecules to the cathode oxygen reduction reaction position, improves the oxygen reduction reaction efficiency in unit time, and can improve the discharge power and current density of the metal-air battery by times.
2. The ultrasonic transducer of the system applies excitation voltage, the ultrasonic transducer generates vibration under certain working frequency to drive air to vibrate, sound pressure is generated at the position where oxygen reduction reaction occurs through a standing wave sound field or a focusing sound field, when the sound pressure at the position where oxygen reduction reaction occurs enters a positive half cycle, a gas compression effect caused by the sound pressure can drive more oxygen molecules to the position where oxygen reduction reaction occurs, the rate of the oxygen reduction reaction is increased, and further the discharge current and the output electric power of a battery are increased.
3. The working method can be used for the cathode oxygen reduction reaction catalysis of any metal-air battery, and has the advantages of no noise, miniaturization, large scale and good reliability.
Drawings
FIG. 1 is a schematic diagram of the working principle of the present invention;
FIG. 2 is a schematic structural diagram of an embodiment;
FIG. 3 is a graph showing the output power of a zinc-air battery in an example with or without ultrasonic radiation;
FIG. 4 is a graph showing the relationship between the operating current and voltage of the zinc-air battery under different loads in the embodiment with or without ultrasonic radiation;
wherein: 1-ultrasonic transducer, 2-transducer driving circuit, 3-air electrode, 4-electrolyte and 5-metal electrode plate.
Detailed Description
The present invention will be further described with reference to the following specific examples.
Referring to fig. 2, a system using the above-mentioned ultrasound-assisted metal-air battery operating method has a specific structure including an ultrasound transducer 1, a transducer driving circuit 2, an air electrode 3, an electrolyte 4, and a metal electrode plate 5, wherein a focusing head is disposed at a front end of the ultrasound transducer 1, and is capable of focusing ultrasound radiation generated by the ultrasound transducer 1, the air electrode 3 is located at an ultrasound radiation focusing position below the ultrasound transducer 1, the air electrode 3 is a metal plate electrode, the air electrode 3 is located at a surface position of the electrolyte 4, and is partially in contact with the air and partially in contact with the electrolyte 4, and the metal electrode plate 5 is partially or completely immersed in the electrolyte.
When the ultrasonic energy converter works, the ultrasonic energy converter 1 is fixedly placed in an air environment by using a support, when voltage excitation is applied to the ultrasonic energy converter 1, the ultrasonic energy converter 1 can generate vibration with the same frequency as the voltage excitation to drive air vibration, ultrasonic radiation is focused below the ultrasonic energy converter 1, namely the position of the air electrode 3, sound pressure is generated, oxygen molecules in the air are driven to the three-phase interfaces of the air, the air electrode 3 and the electrolyte 4 by the sound pressure more quickly, the oxygen reduction reaction rate generated at the position is increased, and therefore the discharge current and the output electric power of a battery are improved. When the sound pressure is in the positive half cycle, the gas compression effect caused by the sound pressure can drive more oxygen molecules to the oxygen reduction reaction position, so that the oxygen reduction reaction rate is improved, and the discharge current and the output electric power of the battery are further improved.
The ultrasonic transducer 1 of the present invention may adopt a piezoelectric element-radiation film excitation structure or a cantilever beam excitation structure. The piezoelectric element-radiation film vibration structure is characterized in that a piezoelectric ceramic piece is used as a vibration source to drive a hard film material, and the film material is light, so that the power consumption is low; the cantilever beam vibration structure is characterized in that one end of the cantilever beam is bonded with piezoelectric ceramic to be a vibration end, the vibration end is a fixed end, the other end of the cantilever beam is a free end, and the vibration amplitude of the piezoelectric ceramic can be amplified through the bending deformation of the cantilever beam.
The frequency of the driving circuit of the ultrasonic transducer 1 is generally in a high-frequency interval, the frequency is more than 20kHz, the transducer driving circuit 2 has a conversion function, the driving circuit can be rectified, filtered and power amplified, and an adjustment interval is designed and adjusted according to actual needs, so that the ultrasonic driving of the ultrasonic transducer 1 is realized.
The metal-air battery system for improving the electrical output power by utilizing the ultrasound comprises a metal-air solid battery or a metal-air flow battery based on the ultrasound catalysis principle. The metal-air solid battery is a metal-air battery with a solid or colloidal electrolyte; the metal-air flow battery refers to a metal-air battery with a liquid electrolyte and a circulating solution.
In an embodiment of the present invention,
the ultrasonic transducer 1: the working frequency is 71kHz, the input voltage is 70V (peak-to-peak value), the current is 170mA (effective value), and the distance from the liquid level of the electrolyte solution is 2 cm;
transducer drive circuit 2: sending out a signal by a function signal generator (Tektronix ARG 3022B, 250Ms/s, 25MHz), and amplifying the signal power by a power amplifier (hpf-83a Nanjing Sk technology and technology industry Co., Ltd.) for driving a transducer;
air electrode 3: a metal sheet electrode of 10 x 0.5mm size located at the electrolyte solution level;
electrolyte 4: KOH aqueous solution with the concentration of 6mol/l, 75 ml;
metal electrode plate 5: metallic zinc with a purity of 99.9% and a size of 2.5 x 5.0 x 0.1 cm.
FIG. 3 is a graph showing the output power curve of the zinc-air cell in the example with or without ultrasonic radiation,
fig. 4 is a graph showing the relationship between the operating current and the voltage of the zinc-air battery under different loads in the embodiment under the condition of the existence of ultrasonic radiation.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are also included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (5)
1. The working method of the ultrasonic-assisted metal-air battery is characterized in that: the ultrasonic transducer (1) is driven by the transducer driving circuit (2), sound pressure is generated at the junction of the air electrode (3) and the air and electrolyte (4), oxygen in the air, electrons in the electrolyte (4) and water molecules are catalyzed by the sound pressure through oxygen reduction reaction at the air electrode (3), and then the output current and the output electric power of the metal-air battery system are improved; the system of the ultrasonic-assisted metal-air battery working method comprises an ultrasonic transducer (1), a transducer driving circuit (2), an air electrode (3), a metal electrode plate (5) and an electrolyte (4), wherein one part of the air electrode (3) is exposed in the air and is in contact with the air, the other part of the air electrode is in surface contact with the electrolyte (4), the metal electrode plate (5) is completely or partially immersed in the electrolyte (4), the transducer driving circuit (2) can drive the ultrasonic transducer (1) to generate sound pressure, and the sound pressure acts on the junction of the air electrode (3) and the air and the electrolyte (4); the radiation surface of the ultrasonic transducer (1) is a concave surface, the generated working sound field is a focusing sound field or a quasi-focusing sound field, the working frequency range is 0.01Hz-10GHz, and the focus area of the sound field covers the whole or part of the surface of the air electrode (3).
2. The method of operating an ultrasound-assisted metal-air battery of claim 1, wherein: the size range of the air electrode (3) is 1-100mm2*0.5-10mm。
3. The operating method of an ultrasound-assisted metal-air battery according to claim 2, characterized in that: the working voltage of the transducer driving circuit (2) comes from the battery system.
4. The operating method of an ultrasound-assisted metal-air battery according to claim 2, characterized in that: the working voltage of the transducer driving circuit (2) is from an external power supply system.
5. The operating method of an ultrasound-assisted metal-air battery according to claim 3, characterized in that: the metal-air battery system comprises a metal-air solid-state battery system or a metal-air flow battery system.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910322642.6A CN109980322B (en) | 2019-04-22 | 2019-04-22 | Ultrasonic-assisted metal-air battery working method and system |
| PCT/CN2019/113561 WO2020215641A1 (en) | 2019-04-22 | 2019-10-28 | Ultrasonic-assisted fuel cell manufacturing method and system |
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| CN201910322642.6A CN109980322B (en) | 2019-04-22 | 2019-04-22 | Ultrasonic-assisted metal-air battery working method and system |
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| CN109980322B true CN109980322B (en) | 2021-04-13 |
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| CN109980322B (en) * | 2019-04-22 | 2021-04-13 | 南京航空航天大学 | Ultrasonic-assisted metal-air battery working method and system |
| CN111403786B (en) * | 2019-11-21 | 2022-04-19 | 南京航空航天大学 | Method for improving performance of metal-air flow battery by utilizing ultrasonic micro-flow driving |
| CN111146477A (en) * | 2019-12-30 | 2020-05-12 | 南京航空航天大学 | Ultrasonic micro-liquid flow metal-air battery system |
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| CN203644882U (en) * | 2013-11-27 | 2014-06-11 | 武汉理工大学 | Direct alcohol fuel battery structure |
| CN108693246B (en) * | 2018-07-10 | 2024-03-29 | 南京航空航天大学 | Structure of ultrasonic bulk acoustic wave gas sensing device |
| CN109520612A (en) * | 2018-11-13 | 2019-03-26 | 上海交通大学 | The burnt system and method for the quick survey of the practical sound field of immersion type focused transducer |
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| CN109980322B (en) * | 2019-04-22 | 2021-04-13 | 南京航空航天大学 | Ultrasonic-assisted metal-air battery working method and system |
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- 2019-04-22 CN CN201910322642.6A patent/CN109980322B/en active Active
- 2019-10-28 WO PCT/CN2019/113561 patent/WO2020215641A1/en active Application Filing
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| CN101783429A (en) * | 2009-01-16 | 2010-07-21 | 北京化工大学 | Zinc-oxygen single flow battery |
| CN101811751A (en) * | 2010-04-15 | 2010-08-25 | 南京航空航天大学 | Traveling wave type ultrasound reaction vessel |
| CN101829531A (en) * | 2010-04-30 | 2010-09-15 | 南京航空航天大学 | Variable cross-section standing wave ultrasonic reactor |
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| WO2020215641A1 (en) | 2020-10-29 |
| CN109980322A (en) | 2019-07-05 |
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