CN116247236A - All-vanadium redox flow battery is with integrative electrode frame and bipolar plate structure - Google Patents

All-vanadium redox flow battery is with integrative electrode frame and bipolar plate structure Download PDF

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Publication number
CN116247236A
CN116247236A CN202111483145.8A CN202111483145A CN116247236A CN 116247236 A CN116247236 A CN 116247236A CN 202111483145 A CN202111483145 A CN 202111483145A CN 116247236 A CN116247236 A CN 116247236A
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electrode frame
bipolar plate
battery
hole
electrode
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孙佳伟
李先锋
史丁秦
刘涛
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Dalian Institute of Chemical Physics of CAS
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Dalian Institute of Chemical Physics of CAS
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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
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/02—Details
    • H01M8/0271—Sealing or supporting means around electrodes, matrices or membranes
    • H01M8/0273—Sealing or supporting means around electrodes, matrices or membranes with sealing or supporting means in the form of a frame
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/18—Regenerative fuel cells, e.g. redox flow batteries or secondary fuel cells
    • H01M8/184—Regeneration by electrochemical means
    • H01M8/188—Regeneration by electrochemical means by recharging of redox couples containing fluids; Redox flow type batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • 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

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
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  • Sustainable Energy (AREA)
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  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Fuel Cell (AREA)

Abstract

The invention discloses an integrated electrode frame and bipolar plate structure for an all-vanadium redox flow battery, and a preparation method and application thereof, and specifically comprises the following steps: and sealing the electrode frame and the bipolar plate by adopting a welding method to form an integrated battery frame structure. The electrode frame is made of transparent material; the bipolar plate is a non-transparent conductive composite plate. The technology disclosed by the invention can integrate the electrode frame, the bipolar plate and other key components of the all-vanadium redox flow battery, and the integrated battery structure element prepared by the method has a plurality of advantages: the integrated battery structure has the advantages that: the integrated unit can be used as an independent integrated unit for assembling the electric pile, so that the assembling efficiency of the electric pile is greatly improved, the sealing reliability of the electric pile is greatly improved, the sealing cost is greatly reduced, the thickness of the battery is reduced, the volume of the battery is greatly reduced, and the volumetric energy density of the vanadium redox flow battery is further improved; meanwhile, the defect that the voltage of a single battery cannot be measured by a pile assembled by an early integrated battery structure can be overcome.

Description

All-vanadium redox flow battery is with integrative electrode frame and bipolar plate structure
Technical Field
The invention relates to the technical field of all-vanadium redox flow batteries, in particular to an integrated battery structure for an all-vanadium redox flow battery and a preparation method.
Background
The inherent characteristics of wind energy, solar energy and other renewable energy sources such as randomness, intermittence, volatility, difficult direct grid connection and the like limit the development and utilization of the renewable energy sources to a certain extent. Therefore, the development of energy storage technology used with the energy storage device becomes a key point.
Energy storage technologies include two broad categories, physical energy storage and chemical energy storage. The physical energy storage comprises pumping energy storage, compressed air energy storage, flywheel energy storage and the like. The chemical energy storage mainly comprises lead-acid batteries, sodium-sulfur batteries, flow batteries, lithium ion batteries and the like. However, various energy storage technologies have suitable application fields, and chemical energy storage technologies suitable for large-scale energy storage mainly comprise flow batteries, sodium-sulfur batteries, lead-acid batteries and lithium ion batteries.
In the flow battery, because the all-vanadium flow battery has the advantages of independent design of output power and energy storage capacity, only one of electrolyte ions, no phase change of other batteries during charging and discharging, long service life of the battery, good charging and discharging performance, deep discharging without damaging the battery, low self-discharging, large site selection freedom degree of the vanadium battery, full-automatic closed running of the system, no pollution, simple maintenance, low operation cost, no potential explosion or ignition hazard of the battery system, high safety, most of battery components being cheap carbon materials and engineering plastics, abundant material sources, easy recovery, no need of noble metal as an electrode catalyst, high energy efficiency, 75-80 percent, high starting speed and the like, the flow battery is more focused.
The traditional all-vanadium redox flow battery pile structure sequentially comprises a current collecting plate, a bipolar plate, a sealing gasket, an electrode frame, a sealing gasket, an electrode, a diaphragm, an electrode, a sealing gasket, an electrode frame, a sealing gasket, a bipolar plate and a current collecting plate. The diaphragm plays roles of blocking the anode and the cathode and preventing the battery from leaking, the sealing gasket among the components plays roles of preventing the battery from leaking outside, and the sealing gasket is used in a large amount, so that the volume of the electric pile is increased, the volumetric specific energy of the electric pile is reduced, the assembly procedure of the electric pile and the risk of the electric pile leaking outside are increased, and the electric pile cost is increased.
The electric pile assembled by the early integrated structural design has a disadvantage that the voltage of a single battery cannot be measured after the electric pile is assembled, and the voltage value can intuitively reflect the uniformity of each battery of the electric pile, so that the electric pile has important significance.
Disclosure of Invention
In order to solve the technical problems, the invention redesigns a new integrated electrode frame and bipolar plate structure on the basis of ensuring the improvement of the sealing reliability of the all-vanadium redox flow battery, reducing the thickness of the battery, reducing the volume of the battery and further improving the volume energy density of the all-vanadium redox flow battery.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
an integrated electrode frame and bipolar plate structure for an all-vanadium redox flow battery, wherein the electrode frame is a flat plate with a through hole in the middle;
the electrode frame is made of transparent materials; the bipolar plate is a flat plate made of non-transparent materials;
a protrusion serving as a tab extends from the edge of the bipolar plate in a direction away from the bipolar plate and parallel to the surface of the bipolar plate; an annular step is etched on the surface of one side of the electrode frame and the peripheral edge of the opening end face of the middle through hole in the direction away from the through hole, and a through hole A parallel to the surface of the flat plate is formed in the flat plate body between the annular step and the peripheral edge of the electrode frame; the peripheral edge of the bipolar plate is arranged on the annular step of the electrode frame, the peripheral edge of one side surface of the bipolar plate is attached to the annular step, and the electrode lugs extend out of the electrode frame through the through holes A.
The thickness of the polar lug in the direction vertical to the surface of the bipolar plate is the same as the thickness of the bipolar plate, and the polar lug and the bipolar plate are the same in quality;
the thickness of the lug is the same as or equivalent to the thickness of the through hole A in the direction vertical to the surface of the electrode frame, the extending direction of the lug parallel to the side of the bipolar plate where the lug is positioned is the width of the lug, and the width of the lug is the same as or equivalent to the width of the through hole A (the direction parallel to the opening end face of the through hole).
The through holes A correspond to the lug positions of the bipolar plates, so that when the bipolar plates are placed in the through holes of the electrode frame, the lugs of the bipolar plates can penetrate through the through holes A of the electrode frame, the length of the lugs exposed out of the edge of the electrode frame at the moment is ensured to be not less than 2mm, and the length is preferably 5mm-20mm; the minimum value of the width of the bipolar plate lug is 2mm, and the preferred value is 5mm-50mm.
The material of the sealed joint of the bipolar plate and the electrode frame at least contains the same substance; at least one kind of the same substances including any one or more than two kinds of PP, PE, PS, PC, ABS, PMMA, PET.
The two opposite sides of the surface of one side of the flat plate of the electrode frame are provided with fluid distribution flow passages near the edges; the other side is a plane without a flow passage.
The peripheral edge of the bipolar plate is positioned on the annular step of the electrode frame, and the peripheral edge of one side surface of the bipolar plate is overlapped with the annular step.
The laser light transmittance of the transparent electrode frame is more than 20%, preferably more than 40%;
the difference of the laser transmittance of the transparent electrode frame and the non-transparent bipolar plate is 15-100%, preferably 35-100%;
the non-transparent material is the combination of one or more than two of PP, PE, PS, PC, ABS, PMMA, PET and the toner, and the toner is one or more than two of black, yellow, brown and deep blue;
the transparent material is one or more than two of PP, PE, PS, PC, ABS, PMMA, PET;
the component materials of the bipolar plate and the electrode frame at least contain the same substances, and the mass content of the same substances in the component materials is more than or equal to 10% of the respective mass of the component materials, preferably more than or equal to 40% of the respective mass of the component materials;
the bipolar plate is a carbon-plastic composite plate composed of conductive carbon black and/or graphite.
The technology is prepared through the following steps:
a protrusion serving as a tab extends from the edge of the bipolar plate in a direction away from the bipolar plate and parallel to the surface of the bipolar plate; an annular step is etched on the surface of one side of the electrode frame and the peripheral edge of the opening end face of the middle through hole in the direction away from the through hole, and a through hole A parallel to the surface of the flat plate is formed in the flat plate between the annular step and the peripheral edge of the electrode frame; the peripheral edge of the bipolar plate is arranged on the annular step of the electrode frame, the peripheral edge of one side surface of the bipolar plate is attached to the annular step, and the electrode lug extends to the outer side of the electrode frame through the through hole A;
the peripheral edges of the bipolar plate are hermetically and fixedly connected to the annular steps of the electrode frame by adopting a welding method, and simultaneously, the lugs are hermetically and fixedly connected in the through holes A of the electrode frame by adopting a welding method again at the front and back sides of the transverse electrode frame at the through holes A of the electrode frame, so that the bipolar plate and the electrode frame are combined into a whole.
The welding mode is laser welding, and the welding power between the electrode frame and the bipolar plate is preferably 10-250W; the welding speed is 0.2-50mm/s.
The battery frame structure is applied to an all-vanadium redox flow battery pile, and the pile is formed by connecting one or more than two single cells in series. The pile power is 0.5-100kW.
The invention has the beneficial effects that:
1. according to the invention, through optimizing the structure and the materials of the electrode frame and the bipolar plate, the direct welding and sealing of the bipolar plate and the electrode frame are realized, a two-in-one integrated battery assembly is formed, and the integrated battery structure remarkably improves the sealing reliability of the all-vanadium redox flow battery; the reliability of the high-power flow battery pile especially suitable for large-scale energy storage technology is obviously improved.
2. Through re-optimizing the electrode frame and the bipolar plate structure, the electric pile assembled by the integrated structure can measure the voltage of a single battery in real time, monitor the running uniformity of the electric pile and ensure the high-efficiency running of the electric pile.
3. The invention reduces the use of the sealing gasket, reduces the thickness of the battery and improves the volumetric specific energy of the battery;
4. the utilization rate of the bipolar plate is improved.
Drawings
FIGS. 1 and 2 are schematic views of transparent electrode frames, 1-transparent electrode frames; 2-steps; 3-through hole, 4-through hole A;
FIG. 3 is a schematic illustration of a bipolar plate of non-transparent material, a 5-bipolar plate; 6-electrode lugs;
fig. 4 is a schematic diagram of an integrated electrode frame and bipolar plate structure.
Detailed Description
The following examples are further illustrative of the invention and are not intended to limit the scope of the invention.
Example 1
The mass content of the electrode frame is 100wt% of polyethylene material, and the light transmittance is 95%; the bipolar plate adopts a carbon-plastic composite plate with the polyethylene mass content of 30-50% (50% in this case) and the graphite powder mass content of 70-50% (50% in this case), and the light transmittance is 0.8%. The length, width and thickness of the electrode frame are respectively 40cm, 50cm and 4.4mm, the length, width and thickness of the bipolar plate are respectively 37cm, 46cm and 0.8mm, the width of the electrode frame is 2cm, the length of the electrode ear is 2.5cm, the thickness of the electrode ear is 0.8mm, and the length and width of the through hole in the middle of the electrode frame are 36cm and 45cm. The peripheral edge of the through hole in the middle of the electrode frame is etched with an annular step with the width of 5mm in the direction away from the through hole, and the thickness is 1mm. A through hole A with the width of 2cm is etched at the position of 21.5-23.5cm of the width direction of the through hole of the electrode frame, and the height (namely the thickness, the direction vertical to the surface of the electrode frame) of the hole is 0.8mm. The holes take the annular steps as planes, and the distance between the through holes A and the edges of the two sides is 1mm and 2.6mm respectively in the thickness direction of the electrode frame.
Placing a bipolar plate at the through hole of the electrode frame, inserting the lug of the bipolar plate into the through hole A of the electrode frame, welding the bipolar plate on an annular step with the width of 5mm etched at the peripheral edge of the through hole in the middle of the electrode frame by adopting a welding method, and then welding the lug of the bipolar plate in the through hole A of the electrode frame, wherein the welding power is 50W, and the welding speed is 11mm/s; forming a two-in-one part of the bipolar plate electrode frame. According to the method, 10 groups of 'two-in-one' components are welded in sequence, and 10 sections of 2kW all-vanadium redox flow battery stacks are assembled with other battery materials (diaphragms, electrodes and the like).
Performing external leakage detection on the assembled 10-section all-vanadium redox flow battery pile, wherein the maximum internal leakage detection pressure is 0.03MPa, and the external leakage detection pressure is the same as the maximum internal leakage detection pressure0.26MPa, and no air leakage. After measurement by a graduated scale, the thickness of the galvanic pile is 95mm. At a constant current of 100mA/cm 2 The battery performance test is carried out under the condition that the coulomb efficiency of the battery is 98.5%, the voltage efficiency is 87.9% and the energy efficiency is 86.6%. Meanwhile, in the battery operation process, the voltage of a single battery at a certain moment can be measured by utilizing the externally-leaked tab, wherein the voltage is respectively 1.457V, 1.449V, 1.447V, 1.449V,1.450V, 1.447V, 1.449V, 1.447V and 1.450V.
Example 2
The mass content of the electrode frame is 100wt% of polyethylene material, and the light transmittance is 90%; the bipolar plate adopts a carbon-plastic composite plate with the polyethylene mass content of 30-50% (50% in this case) and the graphite powder mass content of 70-50% (50% in this case), and the light transmittance is 0.5%. The length, width and thickness of the electrode frame are respectively 40cm, 30cm and 4.4mm, the length, width and thickness of the bipolar plate are respectively 37cm, 26cm and 0.8mm, the electrode lugs with the width of 4cm and the length of 3cm are arranged at the positions of 16.5-20.5cm in the length direction of the bipolar plate, the thickness of the electrode lugs is 0.8mm, and the length and width of the through holes in the middle of the electrode frame are 36cm and 25cm. The peripheral edge of the through hole in the middle of the electrode frame is etched with an annular step with the width of 5mm in the direction away from the through hole, and the thickness is 1mm. A through hole A with the width of 4cm is etched at the position of 16-20cm in the length direction of the through hole of the electrode frame, and the height (namely the thickness, the direction perpendicular to the surface of the electrode frame) of the hole is 0.8mm. The holes take the annular steps as planes, and the distance between the through holes A and the edges of the two sides is 1mm and 2.6mm respectively in the thickness direction of the electrode frame.
Placing a bipolar plate at the through hole of the electrode frame, inserting the lug of the bipolar plate into the through hole A of the electrode frame, welding the bipolar plate on an annular step with the width of 5mm etched at the peripheral edge of the through hole in the middle of the electrode frame by adopting a welding method, and then welding the lug of the bipolar plate in the through hole A of the electrode frame, wherein the welding power is 50W, and the welding speed is 11mm/s; forming a two-in-one part of the bipolar plate electrode frame. According to the method, 10 groups of 'two-in-one' components are welded in sequence, and 10 sections of 2kW all-vanadium redox flow battery stacks are assembled with other battery materials (diaphragms, electrodes and the like).
Performing external leakage detection on the assembled 10-section all-vanadium redox flow battery pile, wherein the maximum internal leakage detection pressure is 0.03MPa, the external leakage detection pressure is 0.26MPa, and no air leakage existsPhenomenon. After measurement by a graduated scale, the thickness of the galvanic pile is 95mm. At a constant current of 100mA/cm 2 The battery performance test is carried out under the condition that the coulomb efficiency of the battery is 98.8%, the voltage efficiency is 87.4% and the energy efficiency is 86.4%. Meanwhile, in the battery operation process, the voltage of a single battery at a certain moment can be measured by utilizing the externally-leaked tab, and the voltages are respectively 1.333V,1.329V,1.331V, 1.328V,1.330V,1.329V, 1.330V and 1.330V.
Comparative example 1
The mass content of the electrode frame is 100wt% of polyethylene material, and the light transmittance is 95%; the bipolar plate adopts a carbon-plastic composite plate with the polyethylene mass content of 30-50% (50% in this case) and the graphite powder mass content of 70-50% (50% in this case), and the light transmittance is 0.8%. The length, width and thickness of the electrode frame are respectively 40cm, 50cm and 4.4mm, the length, width and thickness of the bipolar plate are respectively 37cm, 46cm and 0.8mm, the length and width of the through hole of the electrode frame are respectively 36cm and 45cm, annular steps with the width of 5mm are etched at the edges of the periphery of the through hole in the middle of the electrode frame in the direction away from the through hole, and the thickness is 1mm.
Placing the bipolar plate at the through hole of the electrode frame, and welding the bipolar plate on an annular step with the width of 5mm etched at the peripheral edge of the through hole in the middle of the electrode frame by adopting a welding method, wherein the welding power is 50W, and the welding speed is 11mm/s; forming a two-in-one part of the bipolar plate electrode frame. According to the method, 10 groups of 'two-in-one' components are welded in sequence, and 10 sections of 2kW all-vanadium redox flow battery stacks are assembled with other battery materials (diaphragms, electrodes and the like).
And carrying out external leakage detection on the assembled 10-section all-vanadium redox flow battery pile, wherein the maximum internal leakage detection pressure is 0.03MPa, and the external leakage detection pressure is 0.26MPa, so that no air leakage phenomenon exists. After measurement by a graduated scale, the thickness of the galvanic pile is 95mm. At a constant current of 100mA/cm 2 The battery performance test is carried out under the condition that the coulomb efficiency of the battery is 98.4%, the voltage efficiency is 87.9% and the energy efficiency is 86.5%.
As can be seen from example 1 and comparative example 1, under the same conditions, the galvanic pile with the outer drain electrode ear arranged on the bipolar plate can realize real-time monitoring of single-section voltage without any influence on the tightness of the battery.

Claims (10)

1. The integrated electrode frame and bipolar plate structure for the all-vanadium redox flow battery is characterized in that the electrode frame is a flat plate with a through hole in the middle;
the electrode frame is made of transparent materials; the bipolar plate is a flat plate made of non-transparent materials;
a protrusion serving as a tab extends from the edge of the bipolar plate in a direction away from the bipolar plate and parallel to the surface of the bipolar plate; an annular step is etched on the surface of one side of the electrode frame and the peripheral edge of the opening end face of the middle through hole in the direction away from the through hole, and a through hole A parallel to the surface of the flat plate is formed in the flat plate body between the annular step and the peripheral edge of the electrode frame; the peripheral edge of the bipolar plate is arranged on the annular step of the electrode frame, the peripheral edge of one side surface of the bipolar plate is attached to the annular step, and the electrode lugs extend out of the electrode frame through the through holes A.
2. The battery frame structure according to claim 1, wherein:
the thickness of the polar lug in the direction vertical to the surface of the bipolar plate is the same as the thickness of the bipolar plate, and the polar lug and the bipolar plate are the same in quality;
the thickness of the lug is the same as or equivalent to the thickness of the through hole A in the direction vertical to the surface of the electrode frame, the extending direction of the lug parallel to the side of the bipolar plate where the lug is positioned is the width of the lug, and the width of the lug is the same as or equivalent to the width of the through hole A (the direction parallel to the opening end face of the through hole).
3. The battery frame structure according to claim 1, wherein:
the through holes A correspond to the lug positions of the bipolar plates, so that when the bipolar plates are placed in the through holes of the electrode frame, the lugs of the bipolar plates can penetrate through the through holes A of the electrode frame, the length of the lugs exposed out of the edge of the electrode frame at the moment is ensured to be not less than 2mm, and the length is preferably 5mm-20mm; the minimum value of the width of the bipolar plate lug is 2mm, and the preferred value is 5mm-50mm.
The material of the sealed joint of the bipolar plate and the electrode frame at least contains the same substance; at least one kind of the same substances including any one or more than two kinds of PP, PE, PS, PC, ABS, PMMA, PET.
4. The battery frame structure of claim 1, wherein the electrode frame has fluid distribution flow channels on opposite sides of the planar one-sided surface near the edges; the other side is a plane without a flow passage.
5. The battery frame structure of claim 1, wherein the peripheral edge of the bipolar plate is positioned on the annular step of the electrode frame, and the peripheral edge of one side surface of the bipolar plate is overlapped with the annular step.
6. The electrode frame structure of claim 1, wherein:
the laser light transmittance of the transparent electrode frame is more than 20%, preferably more than 40%;
the difference of the laser transmittance of the transparent electrode frame and the non-transparent bipolar plate is 15-100%, preferably 35-100%;
the non-transparent material is the combination of one or more than two of PP, PE, PS, PC, ABS, PMMA, PET and the toner, and the toner is one or more than two of black, yellow, brown and deep blue;
the transparent material is one or more than two of PP, PE, PS, PC, ABS, PMMA, PET.
7. An electrode frame structure according to claim 1 or 4, wherein:
the component materials of the bipolar plate and the electrode frame at least contain the same substances, and the mass content of the same substances in the component materials is more than or equal to 10% of the respective mass of the component materials, preferably more than or equal to 40% of the respective mass of the component materials;
the bipolar plate is a carbon-plastic composite plate composed of conductive carbon black and/or graphite.
8. A method for preparing an integrated electrode frame structure for an all-vanadium redox flow battery according to any one of claims 1 to 7, which is characterized by comprising the following steps:
a protrusion serving as a tab extends from the edge of the bipolar plate in a direction away from the bipolar plate and parallel to the surface of the bipolar plate; an annular step is etched on the surface of one side of the electrode frame and the peripheral edge of the opening end face of the middle through hole in the direction away from the through hole, and a through hole A parallel to the surface of the flat plate is formed in the flat plate between the annular step and the peripheral edge of the electrode frame; the peripheral edge of the bipolar plate is arranged on the annular step of the electrode frame, the peripheral edge of one side surface of the bipolar plate is attached to the annular step, and the electrode lug extends to the outer side of the electrode frame through the through hole A;
the peripheral edges of the bipolar plate are hermetically and fixedly connected to the annular steps of the electrode frame by adopting a welding method, and simultaneously, the lugs are hermetically and fixedly connected in the through holes A of the electrode frame by adopting a welding method again at the front and back sides of the transverse electrode frame at the through holes A of the electrode frame, so that the bipolar plate and the electrode frame are combined into a whole.
9. The method of preparing as claimed in claim 8, wherein: the welding mode is laser welding, and the welding power between the electrode frame and the bipolar plate is preferably 10-250W; the welding speed is 0.2-50mm/s.
10. Use of a cell frame structure according to any one of claims 1 to 7 in an all-vanadium redox flow battery stack formed by connecting one or more single cells in series.
CN202111483145.8A 2021-12-07 2021-12-07 All-vanadium redox flow battery is with integrative electrode frame and bipolar plate structure Pending CN116247236A (en)

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CN202111483145.8A CN116247236A (en) 2021-12-07 2021-12-07 All-vanadium redox flow battery is with integrative electrode frame and bipolar plate structure

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Application Number Priority Date Filing Date Title
CN202111483145.8A CN116247236A (en) 2021-12-07 2021-12-07 All-vanadium redox flow battery is with integrative electrode frame and bipolar plate structure

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CN116247236A true CN116247236A (en) 2023-06-09

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