Ultrasonic-assisted biomass metal-fuel cell device

Abstract

The invention discloses an ultrasonic-assisted biomass metal-fuel cell device. Belongs to the technical field of ultrasonic, fluid driving and battery mutual intersection. The ultrasonic fluid driving device comprises a base station, electrodes, a reaction cavity, a piezoelectric plate and a piezoelectric plate driving circuit, according to the device, the polarization resistance of the electrode and the concentration polarization effect of the cell are weakened by using a sound pressure field and a sound flow field generated by ultrasound in the biological electrolyte, so that the discharge performance of the biomass metal-fuel cell is improved; according to the device, the problem of poor discharge performance (low output power) of the battery when the biomass is used as the electrolyte is solved; sustainability is not changed, carbon emission is avoided, and the method is green and environment-friendly.

Description

Technical Field

[0001] The present invention belongs to the technical field of the intersection of ultrasound, fluid drive and batteries, and relates to an ultrasound-assisted biomass metal-fuel cell device; specifically, a method for improving the discharge performance of a biomass metal-fuel cell using an ultrasonic liquid-phase catalytic electrode. Background Art

[0002] Biomass metal-fuel cells are a new type of battery technology that uses biomass as electrolyte, including starch, glucose, lactate, saline, uric acid, urea and ascorbic acid. More importantly, these biofuels are constantly present in body fluids, tears, sweat and feed liquids; microorganisms, enzymes or precious metals (such as Pt, etc.) are used as cathode electrode catalysts. Compared with traditional metal-fuel cells, biomass metal-fuel cells are more sustainable, carbon-free and green. Therefore, biomass metal-fuel cells are expected to become a power source for portable, wearable, biosensors and implantable microelectronic devices.

[0003] Although biomass metal-fuel cells have a promising future, there are still many problems that need to be solved. For example, when biomass is used as the electrolyte, the battery has poor discharge performance (low output power); specific bioproteases are required as electrocatalysts to increase the redox rate of the cathode electrode; and self-powered biosensors based on metal-fuel cells have low output response voltages, poor durability, and poor stability. Therefore, biomass metal-fuel cells have problems such as poor discharge performance and poor redox reaction rates at the cathode electrode. Summary of the invention

[0004] In view of the above problems, the purpose of the present invention is to propose an ultrasound-assisted biomass metal-fuel cell device to achieve the effect of improving the output power of the biomass metal-fuel cell.

[0005] The technical solution of the present invention is: an ultrasonic-assisted biomass metal-fuel cell device described in the present invention comprises a base, in which a reaction chamber is opened.

[0006] Furthermore, two "L"-shaped electrodes are asymmetrically arranged inside the reaction chamber;

[0007] The two "L"-shaped electrodes are placed on the base in different directions.

[0008] Furthermore, circular grooves are provided on the outer walls of the reaction chambers on both sides of the electrode.

[0009] A piezoelectric piece is arranged in the circular groove.

[0010] Furthermore, the piezoelectric sheet is bonded to the side of the reaction chamber or to the bottom of the center of the reaction chamber by epoxy resin.

[0011] Furthermore, wires are connected to both ends of the piezoelectric sheet.

[0012] Two ends of the piezoelectric sheet are connected to a piezoelectric sheet driving circuit via wires.

[0013] Furthermore, the two "L"-shaped electrodes are aluminum electrodes / platinum electrodes.

[0014] Furthermore, the aluminum electrode material in the electrode is a double-sided conductive aluminum plate, and its thickness is between 0.6mm-1mm;

[0015] The platinum electrode is a platinum sheet with a thickness of 0.06mm-0.2mm, which is staggered between the anode and the cathode.

[0016] Furthermore, the resonance frequency range of the piezoelectric film is 20kHz-200kHz, and the operating frequency f is 103.92kHz-104.89kHz.

[0017] Furthermore, the inner diameter and height of the reaction chamber need to be greater than the diameter of the piezoelectric piece by 20 mm and less than 35 mm, and the reaction chamber is made of acrylic material.

[0018] Furthermore, circular holes are provided on the two "L"-shaped electrodes.

[0019] The beneficial effects of the present invention are: 1. It has the advantages of simple structure, low cost, low energy consumption, no moving parts, strong applicability and good stability; 2. It improves the problem of poor discharge performance of biomass metal-fuel cells; 3. It does not change its advantages of sustainability, no carbon emissions and green environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the present invention;

[0021] Figure 2 It is an experimental data diagram of an embodiment of the present invention;

[0022] In the figure, 1 is a base, 2 is an electrode, 3 is a reaction chamber, 4 is a piezoelectric sheet, and 5 is a piezoelectric sheet driving circuit. DETAILED DESCRIPTION

[0023] The specific technical solutions of the present invention are further described in detail below in conjunction with specific examples.

[0024] As shown in the figure, an ultrasound-assisted biomass metal-fuel cell device according to the present invention includes a base 1, an electrode 2, a reaction chamber 3, a piezoelectric sheet 4, and a piezoelectric sheet driving circuit 5;

[0025] A reaction chamber 3 is arranged on the base 1.

[0026] Furthermore, two “L”-shaped electrodes 2 are asymmetrically arranged inside the reaction chamber 3 ; the two “L”-shaped electrodes 2 are fixed on the base 1 by double-sided adhesive tape.

[0027] Furthermore, a piezoelectric sheet 4 is symmetrically arranged on the outer wall of the reaction chamber 3, and the piezoelectric sheet 4 is bonded to the side position of the reaction chamber 3 or the bottom of the center position of the reaction chamber 3;

[0028] Two ends of the piezoelectric sheet 4 are connected to a piezoelectric sheet driving circuit 5 via wires.

[0029] Furthermore, the resonance frequency range of the piezoelectric film 4 is 20kHz-200kHz, and the operating frequency f is 103.92kHz-104.89kHz.

[0030] Furthermore, the electrode 2 is an aluminum electrode / platinum electrode.

[0031] Furthermore, the aluminum electrode material in the electrode 2 is a double-sided conductive aluminum plate, and its thickness is between 0.6 mm and 1 mm;

[0032] The platinum electrode is a platinum sheet with a thickness of 0.06mm-0.2mm, which is staggered between the anode and the cathode.

[0033] Furthermore, circular grooves are provided on the reaction chamber 3 on both sides of the electrode 2, and the piezoelectric sheet 4 is bonded to the reaction chamber 3 with epoxy resin.

[0034] Furthermore, the inner diameter and height of the reaction chamber 3 need to be larger than the diameter of the piezoelectric sheet 4 by 20 mm and smaller than 35 mm, and the reaction chamber 3 is made of acrylic material.

[0035] Furthermore, when the piezoelectric film 4 is ultrasonically excited, an ultrasonic field will be generated in the electrochemical reaction chamber of the battery; under the action of ultrasound, the sound pressure can reduce the viscosity of the biomass electrolyte (ultrasonic viscosity reduction) and enhance mass transfer, and the sound pressure field on the electrode surface can promote the electrochemical reaction rate of the electrode, thereby reducing the polarization resistance of the electrode; in addition, the acoustic flow can cause a stirring effect on the electrolyte, and the stirring of the electrolyte can weaken the concentration polarization of the battery and improve the discharge performance of the battery.

[0036] Furthermore, the main devices for implementing the method include: a piezoelectric sheet 4 or other equipment capable of generating ultrasound, a piezoelectric sheet driving circuit 5 , an aluminum electrode, a platinum electrode and a reaction chamber 3 .

[0037] Furthermore, the piezoelectric sheet 4 is bonded to the side of the reaction chamber 3 , or bonded to the bottom of the center of the reaction chamber 3 .

[0038] Furthermore, the method of improving the discharge performance of the biomass metal-fuel cell can be realized by changing the ultrasonic excitation mode and vibration mode.

[0039] This method can be combined with other traditional methods to improve the discharge performance of biomass metal-fuel cells, such as using alloy materials as metal anodes and adding inhibitors to the electrolyte.

[0040] Furthermore, when the piezoelectric film 4 is subjected to ultrasonic vibration, an ultrasonic sound field is generated in the biomass electrolyte. Under the action of ultrasound, the sound pressure can reduce the viscosity of the biomass electrolyte (ultrasonic viscosity reduction) and enhance mass transfer, and the sound pressure field on the electrode surface can promote the electrochemical reaction rate of the electrode, thereby reducing the polarization resistance of the electrode; in addition, the acoustic flow can cause a stirring effect on the electrolyte, and the stirring of the electrolyte can weaken the concentration polarization phenomenon of the battery and improve the discharge performance of the battery.

[0041] Furthermore, the biomass electrolyte is prepared by using saline (NaCl), anhydrous glucose, lactic acid, uric acid, ascorbic acid, urea and potassium chloride with deionized water; and the biomass electrolytes with concentrations of 1M, 2M and 3M are prepared for testing.

[0042] Furthermore, in the battery device, the aluminum electrode material is a double-sided conductive aluminum plate with a thickness of 1 mm; the platinum electrode is a 0.06 mm thick platinum sheet, which is staggered between the anode and the cathode; the inner diameter and height of the reaction chamber 3 are 35 mm and 35 mm respectively, and it is made of acrylic material.

[0043] Furthermore, there are circular grooves on the reaction chambers on both sides of the electrode, and the piezoelectric sheet 4 is bonded to the reaction chamber with epoxy resin, and the operating frequency of the piezoelectric sheet 4 is 104.39 kHz;

[0044] The piezoelectric film driving circuit 5 sends an electrical signal from a signal generator to a power amplifier for amplifying the power of the electrical signal to drive the piezoelectric film 4 , and the operating voltage value and the operating current value of the piezoelectric film 4 are displayed by an oscilloscope.

[0045] The present invention proposes a method for improving the discharge performance of a biomass metal-fuel cell using an ultrasonic liquid-phase catalytic electrode. This method improves the problem of poor discharge performance (low output power) of the battery when biomass is used as an electrolyte; and does not change its advantages such as sustainability, zero carbon emissions, and green environmental protection.

Claims

1. An ultrasound-assisted biomass metal-fuel cell device, characterized in that: It comprises a base (1), in which a reaction chamber (3) is provided.

2. The ultrasonic-assisted biomass metal-fuel cell device according to claim 1, characterized in that: Two "L"-shaped electrodes (2) are asymmetrically arranged inside the reaction chamber (3); The two "L"-shaped electrodes (2) are respectively placed on the base platform (1) in different directions.

3. The ultrasonic-assisted biomass metal-fuel cell device according to claim 2, characterized in that: Circular grooves are provided on the outer walls of the reaction chamber (3) on both sides of the electrode (2). A piezoelectric sheet (4) is arranged in the circular groove.

4. The ultrasonic-assisted biomass metal-fuel cell device according to claim 3, characterized in that: The piezoelectric sheet (4) is bonded to the side of the reaction chamber (3) or to the bottom of the center of the reaction chamber (3) by epoxy resin.

5. The ultrasonic-assisted biomass metal-fuel cell device according to claim 3, characterized in that: Lead wires are connected to both ends of the piezoelectric sheet (4). Two ends of the piezoelectric sheet (4) are connected to a piezoelectric sheet driving circuit (5) via wires.

6. The ultrasonic-assisted biomass metal-fuel cell device according to claim 2, characterized in that: The two "L"-shaped electrodes (2) are aluminum electrodes / platinum electrodes.

7. The ultrasonic-assisted biomass metal-fuel cell device according to claim 3, characterized in that: The aluminum electrode material in the electrode (2) is a double-sided conductive aluminum plate, and its thickness is between 0.6 mm and 1 mm; The platinum electrode is a platinum sheet with a thickness of 0.06mm-0.2mm, which is staggered between the anode and the cathode.

8. The ultrasonic-assisted biomass metal-fuel cell device according to claim 3, characterized in that: The resonance frequency range of the piezoelectric sheet (4) is 20 kHz-200 kHz, and the operating frequency f is 103.92 kHz-104.89 kHz.

9. The ultrasonic-assisted biomass metal-fuel cell device according to claim 1, characterized in that: The inner diameter and height of the reaction chamber (3) are greater than the diameter of the piezoelectric sheet (4) by 20 mm and less than 35 mm, and the reaction chamber (3) is made of acrylic material.

10. The ultrasound-assisted biomass metal-fuel cell device according to claim 1, characterized in that: Circular holes are provided on the two "L"-shaped electrodes (2).

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