262 results about "Half-cell" patented technology

The invention discloses boron-phosphorus co-doped phenolic resin-based hard carbon as well as a preparation method and application thereof. The preparation method of the hard carbon comprises the following steps: co-dissolving a phenol monomer and a boron source in a mixed solvent to obtain a phenol monomer mixed solution; a formaldehyde solution is added into the phenol monomer mixed solution for a polymerization reaction, and boron-doped phenolic resin is obtained; and washing and drying the boron-doped phenolic resin, adding a phosphorus source, fully mixing, and carbonizing in a protective atmosphere according to a temperature programming method to obtain the boron-doped phenolic resin. According to the material, based on the synergistic effect between boron and phosphorus elements and a resin-based hard carbon skeleton, the excellent conductivity of the material is guaranteed, meanwhile, defect sites in the material are greatly increased, and through tests, the reversible specific capacity of a sodium ion half-battery adopting the hard carbon negative electrode material is 290 mAh / g or above when the sodium ion half-battery is subjected to a constant-current charge-discharge test under the current density of 1A / g, and the reversible specific capacity of the sodium ion half-battery is higher than 290 mAh / g. And the capacity retention ratio can reach 94.8% after 1000 cycles, and the capacity retention ratio is still more than 60% under the current density of 5A / g.

The invention belongs to the technical field of aqueous zinc ion batteries, and discloses a preparation method and application of an aqueous zinc ion battery negative electrode coating material. The composite material is a silver-loaded carbon nitride composite material, and the composite material is used as a water-based zinc ion battery negative electrode artificial interface layer. A silver-loaded carbon nitride composite nano material is used as a zinc negative electrode interface coating. Silver nano ions can effectively improve electrostatic shielding on the surface of the zinc negative electrode, zinc ions are easier to deposit, and growth of zinc dendrites is inhibited; the material has excellent mechanical strength and chemical stability, so that the corrosion of electrolyte to the negative electrode is effectively inhibited; the protective layer is simple in preparation process, the prepared coating is high in adhesive force, a stable interface layer is easy to form, the half-cell cycle efficiency stability is obviously improved, the half-cell can stably circulate for 1323 circles, and the service life of the water-based zinc ion battery is prolonged.

A chamber, e.g. in a heat exchanger or flowing electrolytic half-cell, for through flow of a fluid which is capable of elastic turbulence has an internal structure with obstructions to compel flow to undergo successive changes of direction thereby applying stress to the flow of fluid through the chamber. The internal structure comprises an upstream portion in which the applied stress induces elastic turbulence to begin and a downstream portion which applies less stress per unit length and sustains the elastic turbulence while providing economy of pressure to propel the fluid. Configuration of the upstream portion may be planned with computer modeling so as to avoid formation of stagnant zones.

The invention discloses a negative electrode material rate capability testing method and application, and the negative electrode material rate capability testing method comprises the steps: taking a negative electrode material to be tested, and assembling the negative electrode material into a button type half cell; activating the button type half cell; the activated button type half cell is subjected to n times of cyclic charging and discharging, and n is a natural number and is larger than or equal to 2; the multiplying power X adopted in the discharging stage of each cycle charging and discharging is different; the state of charge SOC (i) when the potential is the preset value PV in each charging and discharging is calculated, the higher the state of charge SOC (i) is, the better the rate capability of the negative electrode material to be tested is, i is a natural number, and n > = i > = 2. According to the test method provided by the embodiment of the invention, the negative electrode material meeting the quick charge requirement can be quickly screened out, the difference between the multiplying power and the quick charge performance of different materials can be accurately compared, the evaluation efficiency of the lithium ion battery is accelerated, and the test method also plays an important role in improving the efficiency of the process development and optimization process of the negative electrode material.

The invention discloses sodium titanate with a layered crystal structure, a preparation method of the sodium titanate and application of the sodium titanate in a water-based magnesium ion battery, and belongs to the technical field of water-based magnesium ion batteries. According to the invention, the sodium titanate with a layered crystal structure is used as the negative electrode material of the aqueous magnesium ion battery, and due to excellent chemical and structural stability, the sodium titanate can realize reversible Mg < 2 + > intercalation / deintercalation in an aqueous magnesium electrolyte. According to the invention, Na2Ti2O5 and Na2Ti3O7 materials are synthesized by a hydrothermal method and a high-temperature annealing process. In a magnesium chloride electrolyte, the two sodium titanate materials both show extremely low charge and discharge potentials (Na2Ti2O5,-1.3 to-0.6 V vs.SCE; sCE (-1.5 to-1 V vs.SCE) and relatively good cycling stability are achieved. In addition, the charge-discharge specific capacity of the Na2Ti2O5 half cell under the current density of 2A / g is up to 213mAh / g, and the high specific capacity of 150mAh / g is still kept under the high current density of 10A / g. The sodium titanate is an ideal aqueous magnesium battery negative electrode material, has the advantages of low cost and environmental friendliness, and has a great application prospect in the field of aqueous magnesium ion energy storage.

The invention discloses an edge passivation method of a solar cell, which comprises the following steps of: cutting a cell piece along the middle to obtain a half cell piece; stacking the half cells together, and aligning the cutting surfaces; and putting the half cells which are stacked together into a reaction chamber, enabling the cutting surface or the back surface of the cell to face upwards, and depositing a passivation layer on the cutting surface by adopting a PECVD (Plasma Enhanced Chemical Vapor Deposition) method to finish edge passivation of the half cells. According to the edge passivation method, the reaction temperature can be widened to 50-500 DEG C, energy consumption can be reduced, the deposition rate and productivity can be improved, a compact passivation layer with the high hydrogen content can be prepared, the good passivation effect can be achieved on the premise that an annealing procedure is not needed, and the edge passivation method has the advantages of being low in cost, high in productivity, excellent in passivation effect and the like; it can be ensured that the half-piece battery has very high conversion efficiency, the mass production efficiency can be improved by 0.247%, and the method has important significance for promoting industrial application of the half-piece battery.

A method (100) for producing a half-cell (1), in particular formed by a double ceramic layer consisting of an electrode (4) and an electrolyte (5) coupled to each other, for a solid state fuel cell, comprises a process (200) for producing a green electrode body (2); a process (300) for producing a green electrolyte body (3); a coupling step (400), in which the green electrode body (2) and the green electrolyte body (3) are coupled together; and a sintering step (500), following the coupling step (400), in which the green electrode body (2) and the green electrolyte body (3) coupled together are sintered so as to make the half-cell (1) formed by the coupled electrode (4) and electrolyte (5).

A lithium secondary battery includes a positive electrode including a positive electrode active material layer and a negative electrode including a negative electrode active material layer, wherein the negative electrode active material layer includes a negative electrode active material, and the negative electrode active material consists of silicon. In a graph of capacity-voltage measured by manufacturing a half-cell including the positive electrode and a lithium metal electrode and then discharging the half-cell at a constant current of 0.1 C, an inflection point appears in a region in which a voltage is 3.3 V to 3.7 V. The capacity of the positive electrode at the inflection point is from 3% to 25% of the capacity of the positive electrode at a final charge voltage.

A chamber, e.g. in a heat exchanger or flowing electrolytic half-cell, for through flow of a fluid which is capable of elastic turbulence has an internal structure with obstructions to compel flow to undergo successive changes of direction thereby applying stress to the flow of fluid through the chamber. The internal structure comprises an upstream portion in which the applied stress induces elastic turbulence to begin and a downstream portion which applies less stress per unit length and sustains the elastic turbulence while providing economy of pressure to propel the fluid. Configuration of the upstream portion may be planned with computer modeling so as to avoid formation of stagnant zones.

The invention provides a method for generating an OCV curve of a battery mixed electrode. The method comprises the following steps: testing half-battery open-circuit voltage OCP and specific capacity Q corresponding to a single raw material corresponding to a to-be-tested mixed electrode; interpolating an open circuit voltage (OCP) of the half-cell into a function of a state of lithium insertion (SOL); calculating an SOL sequence under a target open-circuit voltage OCV sequence of a single raw material of the mixed electrode and a corresponding specific capacity sequence; adding the specific capacity sequence according to the weight of the mixed weight ratio to obtain the specific capacity sequence of the mixed electrode; and calculating the SOC sequence of the mixed electrode. Based on the thermodynamic principle, a more stable and reliable hybrid electrode OCV prediction result is obtained through mathematical model calculation.

The present invention discloses a biphasic Nitrogen doped sodiophilic anode. The present disclosure also provides a process of preparing a defect rich Nitrogen doped waste polymer derived carbon (PDC) and commercial polyvinyl based polymer derived carbon (PRC) as carbon precursor for use in sodium ion / metal battery with high capacity, long cyclic stability in both half cell and full cell.

The invention belongs to the technical field of binders, and provides a water-based adhesive system, a Si-C composite negative electrode and a preparation method of the Si-C composite negative electrode. The water-based adhesive system comprises polyacrylic acid, a water-based composition, a polymer and water, the water-based composition comprises carboxymethyl cellulose and butadiene styrene rubber in a mass ratio of 1: (1-2), and the polymer comprises a polyurethane elastomer and / or a dynamic covalent bond polymer. The PAA is used as a main bonding matrix, hydrogen bonds or weak chemical bonds are easily formed on the surfaces of silicon particles, and Si expansion can be restrained; cMC / SBR provides certain flexibility and dispersity, and the overall uniformity and flexibility of the electrode coating are improved; the dynamic covalent bond polymer or the polyurethane elastomer can realize reversible crosslinking when electrode microcracks are generated, and the self-repairing capability is provided; the Si-C composite negative electrode prepared by the water-based adhesive system shows higher capacity retention ratio and longer cycle life in a half-battery or full-battery test.

The invention relates to a sulfonic group modified ZIF-67 coated diaphragm as well as a preparation method and application thereof, and belongs to the technical field of lithium batteries. Comprising a porous base membrane and a modified coating coated on one side or two sides of the porous base membrane, and the modified coating comprises sulfonic group functionalized ZIF-67 nanoparticles and a binder, the sulfonic group functionalized ZIF-67 nanoparticles are a metal organic framework material formed by coordination self-assembly of a cobalt source, a 2-methylimidazole ligand and an imidazole auxiliary ligand containing a sulfonic acid group. Imidazole ligands with sulfonic acid groups are introduced into a ZIF-67 framework through in-situ coordination self-assembly, homogenization of lithium ion flux is achieved through regular pore channels of ZIF-67, meanwhile, anion decomposition is promoted through the electrostatic induction effect of the sulfonic acid groups, and the lithium ion transference number is increased. The diaphragm can effectively inhibit the growth of lithium dendrites, and shows excellent cycling stability and rate capability in an NCM811 / Li metal total battery, a Li-Li symmetric battery and a Li-Cu half battery.

The invention belongs to the technical field of lithium ion battery negative electrode materials, and particularly discloses a nanometer silicon / high-entropy alloy oxide / carbon composite lithium ion battery negative electrode material with a honeycomb-like three-dimensional hierarchical nanometer structure and a preparation method of the nanometer silicon / high-entropy alloy oxide / carbon composite lithium ion battery negative electrode material. The preparation method comprises the following steps: respectively adding PVP and silicon nanoparticles into deionized water, and stirring for 12-24 hours; adding oxysalts of iron, nickel, cobalt, chromium and manganese with equal molar weight, stirring for 12-24 hours, and then freeze-drying for 24-48 hours; and finally, putting the freeze-dried product into a tubular furnace, and calcining at high temperature in an inert atmosphere to obtain the composite lithium ion battery negative electrode material. A half battery prepared from the composite lithium ion battery negative electrode material prepared by the method has high initial specific discharge capacity and excellent capacity retention ratio, and the preparation method of the composite material is simple and convenient to operate, low in cost and suitable for large-scale production, and provides a new idea for preparation of a silicon-based composite electrode.

The invention provides a water-based composite electrolyte and a preparation method and application thereof. The water-based composite electrolyte comprises soluble zinc salt, amino acid hydrochloride additives and deionized water. The aqueous composite electrolyte can be used for a symmetrical button cell, a half cell or an aqueous zinc ion total cell. By adjusting zinc ion deposition on the surface of the zinc electrode, the growth of zinc dendrites is reduced, and the shuttle effect of the iodine positive electrode is inhibited, so that the coulombic efficiency and the cycle performance of the water-based zinc-iodine battery are improved. The additive disclosed by the invention can be adsorbed on the surface of a zinc negative electrode, delays the nucleation process and inhibits the growth of zinc dendrites; the form of hydrochloride can play a role of a buffer solution, stabilize the pH value of the electrolyte, inhibit the corrosion of the zinc negative electrode and reduce the hydrogen evolution reaction; the hydrochloride form can weaken the protonation effect of amino acid groups and enhance the electrostatic interaction between the amino acid groups and the polyiodide, so that the shuttle effect is inhibited, and the coulombic efficiency and the cycle performance of the aqueous zinc-iodine battery are improved.

The invention relates to the technical field of lithium ion batteries, in particular to an aging identification method and system based on numerical analysis. Comprising the following steps: S1, extracting intrinsic characteristic parameters of positive and negative electrode material button half cells of the lithium ion battery; s2, obtaining a voltage-capacity curve of the lithium ion three-electrode total battery to be detected, extracting intrinsic characteristic parameters of the lithium ion three-electrode total battery, and comparing and calculating the active material loss of the positive electrode and the negative electrode; s3, calculating the loss of active lithium; s4, calculating impedance capacity loss; and S5, integrating the loss of the active material, the loss of the active lithium and the loss of the impedance capacity, and outputting an aging state evaluation result of the lithium ion battery. According to the method, through a full-process data driving analysis mode, the dimension integrity and model reliability of aging parameter identification are remarkably improved, the interaction mechanism of different aging modes is effectively revealed, and a solution is provided for lithium ion battery health state evaluation.

The invention relates to the technical field of fuel cells, and provides a solid oxide fuel cell and a preparation method thereof, and the preparation method comprises the following steps: providing a half-cell precursor comprising an electrolyte layer and a NiO-based ceramic layer; placing the half-cell precursor in an acid solution for reaction treatment, selectively etching to remove at least part of NiO phase in the NiO-based ceramic layer, and cleaning to form a porous ceramic layer; injecting nickel slurry into pores of the porous ceramic layer, and performing drying and first calcination treatment to form a porous Ni-based metal ceramic composite anode layer; and preparing a porous cathode layer on the surface of the other side of the electrolyte layer to form the solid oxide fuel cell. According to the method, the NiO phase of the NiO-based ceramic layer is removed by using the pickling solution, and the nickel slurry is injected to construct the porous Ni-based metal ceramic composite anode, so that the problems that the pore structure is random and difficult to control when the porous anode is prepared by pore-forming of a traditional pore-forming agent and reduction of NiO by introducing hydrogen, and the active area of the anode is reduced due to migration, agglomeration and coarsening of Ni particles are solved.

The application discloses a kind of half battery and its preparation method, the detection method of open-circuit voltage.The preparation method of the half battery includes the following steps: lithium sheet, separator and graphite pole piece are stacked in sequence, and sealing, standing are carried out, and half battery is obtained;Before stacking the separator, first electrolyte is added to the lithium sheet;Before stacking the graphite pole piece, second electrolyte is added to the separator;The volume ratio of the first electrolyte and the second electrolyte is 1: (1-5).When the half battery prepared by the half battery preparation method of the application is detected by open-circuit voltage, the reliability and stability of the obtained open-circuit voltage are better, and can be used to judge the performance of battery and / or electrode material.

The application provides a positive electrode active material of Li 1+x Ni y M z Mn 2‑x‑y‑z O 4‑k , -0.1≤x≤0.2, 0.4≤y≤0.6, 0≤z≤0.2, M is one or more of Cr, Mo, Nb, Ru, P, S, Ta, W, Tl and Ti, in the first circle charging curve of the half cell of the positive electrode active material, the ratio of the charging capacity of 3.5V-4.4V to the charging capacity of 3.5V-4.95V is A, A satisfies 0.04≤A≤0.3, the product of k and A satisfies 0≤kA≤0.015, and the first circle charging curve is measured at a rate of 0.1C. The positive electrode active material of the application has high kinetic performance and high chemical stability, and the corresponding secondary battery has high rate discharge capacity and long-term storage stability.

The invention discloses a lithium ion battery cycle life prediction method and a lithium ion battery cycle life prediction system based on electrode material loss. The method comprises the following steps: respectively manufacturing positive and negative button half batteries by taking a positive pole piece and a negative pole piece of a to-be-detected total battery; setting an active material gram volume test condition, carrying out cycle test on the button half cell according to the test condition, and calculating the electrode active material gram volume of the button half cell; the method comprises the following steps: placing a to-be-tested total battery in a constant-temperature box, carrying out a cycle test under a target condition, and carrying out an active material gram volume test condition cycle test every certain period and circle number; taking the data of the last circle of the button type half battery and the total battery to be tested under the active material gram capacity test condition, and metering the relationship among the electrode active material mass, the active lithium loss amount and the battery capacity in the battery circulation process; according to the relationship, a battery cycle life prediction model under a target condition is established to predict the attenuation trend of the lithium ion battery in the later cycle period, and the accuracy of battery life prediction is improved.

The application discloses a kind of half-cell devices for evaluating electrochemical performance, and its technical scheme is: including workbench, workbench top side is fixed with fixed plate, workbench top is equipped with performance test mechanism, sealing mechanism and suction disc control mechanism;Performance test mechanism includes connecting shell, connecting shell is equipped in workbench top, connecting shell side is equipped with multiple performance test components, performance test component includes fixed collar, fixed collar is fixedly connected with connecting shell, fixed collar inboard is equipped with support sleeve, fixed collar is movably connected with support sleeve, support sleeve inboard is fixedly connected with heat preservation liquid storage tank, the beneficial effects of the present application are: with humidification and heating system, can be tested under different working conditions, it is beneficial to reduce the performance difference obtained with industrial amplification, can also test oxygen reduction, add flow field plate structure, constitute gas diffusion layer, simulate the real working condition of catalyst in industrial application, the structure of catalyst layer, current and potential state are characterized.

This invention discloses a type of sodium titanate with a layered crystal structure, its preparation method, and its application in aqueous magnesium-ion batteries, belonging to the field of aqueous magnesium-ion battery technology. This invention uses sodium titanate with a layered crystal structure as the negative electrode material in aqueous magnesium-ion batteries. Due to its excellent chemical and structural stability, sodium titanate can achieve reversible magnesium deposition in aqueous magnesium electrolytes. 2+ Intercalation / extraction. This invention synthesizes Na via a hydrothermal method and a high-temperature annealing process. 2 Ti 2 O 5 And Na 2 Ti 3 O 7 Materials. In magnesium chloride electrolyte, both sodium titanate materials exhibit extremely low charge / discharge potentials (Na). 2 Ti 2 O 5 -1.3 to -0.6V vs. SCE; Na 2 Ti 3 O 7 (-1.5 to -1V vs. SCE) and good cycle stability. Furthermore, Na... 2 Ti 2 O 5 The half-cell exhibits a charge-discharge specific capacity of up to 213 mAh / g at a current density of 2 A / g, and maintains a high specific capacity of 150 mAh / g even at a high current density of 10 A / g. The sodium titanate of this invention is an ideal anode material for aqueous magnesium batteries, possessing both low cost and environmental friendliness, and shows great promise for application in the field of aqueous magnesium-ion energy storage.

This application discloses a swelling force testing system and method. The swelling force testing system includes a half-cell and a processor. The half-cell includes an active material to be tested and a piezoelectric element is disposed in the half-cell. The piezoelectric element is connected to the processor and is used to output a voltage to the processor based on its own force. The processor is used to determine the swelling force of the active material to be tested based on a first voltage, which is the voltage output by the piezoelectric element when the half-cell is fully charged. In this way, when the active material to be tested expands, the piezoelectric element can be subjected to pressure and output a voltage to the processor based on its own force. The processor can then determine the swelling force of the active material to be tested based on the voltage output by the piezoelectric element when the half-cell is fully charged, thereby achieving accurate detection of the swelling force of the active material.

The present invention relates to a positive electrode including a positive electrode active material layer including a first positive electrode active material and a second positive electrode active material having an average particle diameter different from each other, in which the average particle diameter D50 of the first positive electrode active material is larger than the average particle diameter D50 of the second positive electrode active material, the first positive electrode active material and the second positive electrode active material include single-particle-type particles, the interface resistance of the positive electrode having a SOC of 50% measured in a coin half cell manufactured using the positive electrode is 6.5 Omega to 8.5 Omega, and the interface resistance of the positive electrode having a SOC of 10% measured in a coin half cell manufactured using the positive electrode is 15 Omega to 19 Omega.

The invention discloses a ZrO2 / Ti4O7-Al2O3 / C composite nanofiber material and a preparation method and application thereof. The preparation method comprises the following steps: preparing alumina nanorods and modifying them with sodium hydroxide; introducing lithiophilic Ti and Zr elements onto the surfaces of the surface-modified alumina nanorods by electrospinning to form a stable ZrO2 / Ti4O7-Al2O3 composite nanofiber fabric; covering the fabric with graphite foil and subjecting the fabric to high-temperature carbonization to obtain the ZrO2 / Ti4O7-Al2O3 / C composite nanofiber material, which is used as a negative electrode material for a lithium metal battery, effectively inhibits dendrite growth and volume expansion of the lithium metal negative electrode, and improves the cycle life and rate performance of the battery; and assembling a half-cell using the ZrO2 / Ti4O7-Al2O3 / C composite nanofiber negative electrode of the invention, effectively inhibiting dendrite growth of the lithium metal negative electrode, and improving the cycle life and rate performance of the battery.

The application provides a SOC and SOH combined estimation method of a full vanadium liquid flow battery, and the method comprises the following steps: S1. constructing an equivalent circuit model, determining parameters of the equivalent circuit model as an activation polarization overpotential V act , a concentration polarization overpotential V con , a pump loss current I pump , an ohmic loss R ohm and an open circuit voltage V s ; S2. constructing a parameter calculation model based on multiple physical fields for calculating the parameters in the equivalent circuit model; S3. substituting material performance parameter values of the full vanadium liquid flow battery into the parameter calculation model to obtain a full vanadium liquid flow battery simulation model with the same or similar material performance; and S4. inputting specific size parameter values of a monitored full vanadium liquid flow battery into the parameter calculation model in step S3 to estimate the SOC and SOH of the monitored full vanadium liquid flow battery. The application improves the universality of the equivalent circuit model for various types of full vanadium liquid flow batteries, can estimate the SOC and SOH of the positive and negative half-cells respectively, and more comprehensively monitors the conditions in the actual operation process of the full vanadium liquid flow battery.

This invention provides a failure analysis method and application for irreversible capacity decay in lithium-ion batteries, relating to the field of battery analysis technology. The failure analysis method first converts the discharge capacity of fresh and failed cells into the discharge capacity of fresh and failed coin half-cells, then obtains the total capacity loss of the coin half-cells. Next, the fresh and failed cells are disassembled in a depleted state and fabricated into fresh positive electrode coin half-cells, failed positive electrode coin half-cells, fresh negative electrode coin half-cells, and failed negative electrode coin half-cells. Utilizing the relationship between different capacity losses, the irreversible capacity caused by the positive electrode structure, CEI growth, negative electrode structure, SEI and deactivated Li growth, negative electrode polarization, and lithium dendrite precipitation is calculated. By analyzing the proportion of each capacity loss in the total capacity loss, the capacity loss of a single lithium-ion cell is indirectly reflected, thereby achieving quantitative analysis of irreversible capacity decay.

The invention relates to the technical field of sodium-ion batteries, in particular to a carbon-based negative electrode material and a preparation method thereof, a sodium-ion battery and electric equipment. The discharge sodium ion flux coefficient FNa < + > of the carbon-based negative electrode material is 40-100 m < 2 > / (mol.h); fNa < + > = (m * SBET * CNa * MNa) / (C2 * h2); m is the mass of the carbon-based negative electrode material in the half cell; the SBET is the specific surface area of the carbon-based negative electrode material; cNa is 1166 mAh / g; the content of MNa is 22.99 g / mol; c2 is the second cycle discharge capacity of the half cell; h2 is the second cycle discharge time of the half cell. According to the invention, the relationship between the electrochemical performance of the carbon-based negative electrode material and the sodium ion flux is constructed, and the discharge sodium ion flux coefficient of the carbon-based negative electrode material is controlled, so that the carbon-based negative electrode material with high capacity and good low-temperature performance can be screened out.

An electrosynthetic cell and its use are disclosed. The electrosynthetic cell can be used in a reductive electrosynthesis of one or more desired chemical products from one or more chemical reactants. The electrosynthetic cell comprises a hydrogen anode half-cell and a cathode half-cell. The hydrogen anode half-cell comprises hydrogen (H2), a first liquid phase solution that is in contact with an anode and a heterogeneous redox catalyst capable of catalyzing the oxidation of H2 to H+, and a redox mediator capable of transferring or accepting electrons and / or protons while undergoing reduction or oxidation. The cathode half-cell comprises a second liquid phase solution comprising the one or more chemical reactants that is in contact with a cathode and a reductive synthesis catalyst capable of catalyzing the reductive synthesis of the one or more desired chemical products from the one or more chemical reactants.

This invention provides a method for enhancing the chemical reaction of a flow battery based on localized ultrasound assistance, comprising the following steps: (1) setting an ultrasonic transducer on the bipolar plates of the positive and negative half-cells of the flow battery. The position and size of the ultrasonic transducer on the bipolar plates should ensure that the area of ​​action of the ultrasound applied by the ultrasonic transducer covers the flow dead zone inside the porous electrode; (2) connecting a signal generator to the ultrasonic transducer via a power amplifier; (3) during the operation of the flow battery, turning on the signal generator and power amplifier to apply ultrasound to the flow battery through the ultrasonic transducer, thereby improving the flow rate and flow uniformity of the electrolyte in the porous electrode and enhancing the chemical reaction of the flow battery. The method of this invention can effectively improve the flow uniformity of the electrolyte inside the porous electrode, realize flexible control of the flow field inside the porous electrode of the flow battery, and reduce the ultrasonic power consumption for flow field control inside the electrode.