CN103887478A - Nanocomposite bipolar storage battery and preparation process of bipolar plate matrix of nanocomposite bipolar storage battery - Google Patents

Nanocomposite bipolar storage battery and preparation process of bipolar plate matrix of nanocomposite bipolar storage battery Download PDF

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Publication number
CN103887478A
CN103887478A CN201410140421.4A CN201410140421A CN103887478A CN 103887478 A CN103887478 A CN 103887478A CN 201410140421 A CN201410140421 A CN 201410140421A CN 103887478 A CN103887478 A CN 103887478A
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matrix
bipolar
metal
electric conducting
nanocomposite
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李培成
陈章华
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JIANGSU TIANZE NANOMETER TECHNOLOGY Co Ltd
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JIANGSU TIANZE NANOMETER TECHNOLOGY Co Ltd
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/64—Carriers or collectors
    • H01M4/66—Selection of materials
    • H01M4/668—Composites of electroconductive material and synthetic resins
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/06—Lead-acid accumulators
    • H01M10/12—Construction or manufacture
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/14—Electrodes for lead-acid accumulators
    • H01M4/16—Processes of manufacture
    • H01M4/20—Processes of manufacture of pasted electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/64—Carriers or collectors
    • H01M4/66—Selection of materials
    • H01M4/665—Composites
    • H01M4/667—Composites in the form of layers, e.g. coatings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/64—Carriers or collectors
    • H01M4/66—Selection of materials
    • H01M4/68—Selection of materials for use in lead-acid accumulators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/64—Carriers or collectors
    • H01M4/82—Multi-step processes for manufacturing carriers for lead-acid accumulators
    • 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
    • Y02E60/10—Energy storage using 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Abstract

The invention discloses a nanocomposite bipolar storage battery and a preparation process of a bipolar plate matrix of the nanocomposite bipolar storage battery. The nanocomposite bipolar storage battery comprises a matrix, a metal sputtering layer and a nanocomposite bipolar battery, wherein the matrix comprises a thermoset or thermoplastic high-molecular polymer and one or more conductive materials; the conductive materials are uniformly distributed in the matrix; the conductive materials arranged in the matrix are at least one material or a combination of more materials; the particle sizes of the conductive materials are within a nano grade or range from the nano grade to a micro grade; the metal sputtering layer is treated by using a metal vacuum magnetron sputtering technology; the matrix with lead or lead alloy as the sputtering metal is pasted, dried, cured and assembled to obtain the nanocomposite bipolar battery. The nanocomposite bipolar plate prepared by the invention has the advantages of good corrosion resistance, firmness in bonding a polar plate matrix sputtering layer, low contact resistance, light weight, low cost and the like, and can meet the condition for large-scale production.

Description

The preparation technology of a kind of nano composite material bipolar battery and bipolar plates matrix thereof
Technical field
The present invention relates to a kind of battery, relate in particular to the preparation technology of a kind of nano composite material bipolar battery and bipolar plates matrix thereof.
Background technology
Battery is divided into primary cell and secondary cell, and wherein secondary cell refers to rechargeable battery.In secondary cell, application is exactly lead acid accumulator the earliest, the most widely, and it can use one pole or bipolar manufacture, or the accurate bipolar cell of single bipolar mutual use.
Traditional lead acid accumulator has following shortcoming: 1, traditional lead acid accumulator in use often has the acid of overflowing, oozes acid and gas acid mist effusion phenomenon, and not only etching apparatus, and contaminated air are very harmful to urban environment; 2, the liquid electrolyte in traditional lead acid accumulator perishable, wash away pole plate, cause the active material PbO2 of pole plate earlier period damage and pole plate layer to come off, cause internal storage battery short circuit, greatly shortened the useful life of lead acid accumulator; 3, traditional lead acid accumulator is difficult in maintenance, needs frequent acid adding, adjusts proportion etc., increases use cost; 4, traditional lead acid accumulator power-on and power-off potential difference is large, easily self discharge; 5, in severe atmospheric environment, (extremely frigid zones and high temperature area) conformability is poor, starts vehicle difficulty when low temperature.
In traditional one pole battery, collect the electric current that active material produces and reach next batteries by the lug connecting each other by collector; Bipolar cell is due to self structure advantage, two-sided painting cream, current delivery path is short, internal resistance is little, battery volume is little, in whole circuit pressure drop less, the traditional lead acid accumulator before is superior a lot.
In bipolar cell, the effect of substrate is most important.Bipolar plates on the one hand will with the active material tight bond of both positive and negative polarity, again two adjacent battery plus-negative plates are separated on the other hand.Substrate must keep its conductivity under plumbic acid corrosive environment, and blocks adjacent cell electrolyte and be communicated with, and must not participate in cell reaction or provide loop for self-discharge of battery.These just require substrate must be to have conductivity, be insoluble to sulfuric acid, sulfuric acid corrosion resistant, keep stable and have higher hydrogen-oxygen overpotential ability in the electrochemical window of battery, do not participate in cell reaction, cell active materials is had to good adsorption capacity, also will be easy to processing and sealing.
At present, have following problem for bipolar lead-acid battery, urgent need will solve: 1: bipolar cell substrate electrical conductivity problems; 2: the corrosion resistant problem of transition zone on matrix; 3: the each pole plate of bipolar cell is asked about the sealing problem of whole battery; 4: guaranteeing, under the prerequisite of conductivity of bipolar plate of high, to obtain the substrate of high strength, high tenacity; 5: whether the technique manufacturing process of whole bipolar cell, be conducive to suitability for industrialized production.
For above problem, just need to there is a kind of new bipolar lead-acid battery to overcome difficulty and the defect in various battery manufactures, thereby realize suitability for industrialized production demand.
Summary of the invention
The present invention, in order to solve the problem existing in prior art and production process, provides the preparation technology of a kind of nano composite material bipolar battery and bipolar plates matrix thereof.
In order to overcome the defect existing in background technology, the present invention solves the technical scheme that the problem that exists in prior art and production process adopts: the preparation technology of a kind of nano composite material bipolar battery and bipolar plates matrix thereof, comprise matrix, metal sputtering layer, nano composite material bipolar cell, described matrix comprises thermosetting or thermoplastic polyester and one or more electric conducting materials composition, described electric conducting material is uniformly distributed in matrix, the electric conducting material being provided with in described matrix is at least one or more combinations, the particle size range of described electric conducting material in nanoscale or nanometer to micron order, described metal sputtering layer adopts the processing of metal vacuum magnetron sputtering technique, matrix after sputter is through being coated with cream, dry, solidify, assembling, obtain a kind of nano composite material bipolar cell.
Further, the processing of described matrix adopting metal vacuum magnetron sputtering technique, the centre position that is metal targets is provided with balance coil, it is connected with power supply, the magnetic field that coil produces and the vacuum magnetic-control sputtering system of externally-applied magnetic field joint effect metal, complete the metal level sputter of matrix, obtain the Polar plate matrix that satisfactory metal sputtering layer is contained on surface, metal targets in described vacuum magnetic-control sputtering is metallic lead target or metallic lead alloy target material, described vacuum magnetic-control sputtering technology comprises operating pressure 10-5～10-7Pa, 30～50 ℃ of sputtering chamber temperature, argon flow amount 50～100, operating voltage 100～300V, operating current 1～10A, magnetic field 300～500Gs, operating frequency 10～80KHz, settling rate 0.1～1.0um/min, sputtering layer thickness 0.01～1.0mm, 0～30 ℃ of circulating cooling coolant-temperature gage, recirculated cooling water hydraulic pressure 0.1～0.5MPa, 20～40 ℃ of operational environments, relative humidity 10%～90%RH.
Further, described matrix is through mold pressing or injection moulding process preparation, described matrix mould pressing method is through preheating, precompressed, hot pressing, cooling and the demoulding obtains, described preheating, precompressed, hot pressing, cooling and the demoulding all completes in mould, described preheat temperature is 100～180 ℃, described preload pressure is 0.1～10MPa, described hot pressing temperature is 100～240 ℃, described pressure is 0.1～20MPa, described hot pressing time is 10～1200s, be 10～1800s described cooling time, the described demoulding has release agent material in mould, comprise general neutrality, oiliness, dryness release agent, or spraying paraffin, spraying demoulding silica gel, oily material, or plating Teflon.Described matrix injection moulding process comprises batch mixing, dry, heating and melting, injection mo(u)lding, the demoulding, described batch mixing is that one or more mixing in thermoplasticity or thermosetting polymer polymer, the mechanical agitation dispersion of electric conducting material process or artificial dispersed with stirring or excusing from death dispersion or ball milling dispersion disperse, described baking temperature is 100～200 ℃, described heating and melting temperature is 100～240 ℃, described injection mo(u)lding, by the material after heating is squeezed to mould, be met the Polar plate matrix of requirement, described release method is as set forth in compression molding method.
Further, in described matrix, thermoplasticity or thermosetting polymer polymer comprise one or more combinations in polyethylene, polypropylene, polybutadiene, polystyrene, Merlon, ABS powder and section bar, in described matrix, electric conducting material is by a kind of or combination in conducting metal, nonmetallic materials, described conducting metal is metallic lead or metallic lead alloy, described nonmetallic materials are non-metal carbon material or macromolecule modified electric conducting material, and described electric conducting material particle size range is nanoscale or nanometer to a kind of or combination in micron order.
Further, the accounting of described electric conducting material in matrix is 0.1%～40%, and thermosetting or the thermoplastic polyester accounting in matrix is 60%～99.9%, and described electric conducting material is dispersed in matrix.
Further, the thickness of described matrix is at 0.1～2.0mm.
Compared with prior art, the advantage having is as follows for patent of the present invention:
1: the present invention adopts nano composite material heat of mixing plasticity or thermosetting polymer polymer compacting bipolar plates matrix, can obtain the Polar plate matrix of high conductivity, be conducive to reduce the internal resistance value of battery itself, reduce the extra consumption of power in battery use procedure;
2: bipolar plates matrix adopting metal vacuum magnetron sputtering technique of the present invention, more traditional hot pressing lead foil, spraying lead powder, electroplate the techniques such as lead layer have bonding firmly, sputtering layer is fine and close, prevent sulfuric acid corrosion, interface contact resistance is low, reduce the advantages such as environmental pollution;
3: the electric conducting material particle size range that the present invention adopts to micron order, has that electric conducting material consumption is few, matrix conductivity is high, the more high advantage of toughness intensity in nanoscale or nanometer compared with conventional batteries;
4: nano composite material bipolar cell has advantages of that battery volume is little, internal resistance is low, efficiency is high, long service life, technique are simple, convenient operation, environmental pollution are little, is applicable to suitability for industrialized production.
Accompanying drawing explanation
Below in conjunction with accompanying drawing and instantiation, the present invention is further elaborated.
Fig. 1 nano composite material bipolar cell of the present invention basal body structure schematic diagram;
Fig. 2 nano composite material bipolar cell of the present invention parent metal vacuum magnetic-control sputtering effect schematic diagram;
Fig. 3 nano composite material bipolar cell of the present invention parent metal vacuum magnetic-control sputtering principle schematic;
In figure: 1, matrix, 2, metal sputtering layer, 3, metallic lead target.
Embodiment
Embodiment 1
As shown in Figure 1: the preparation method of nano composite material bipolar cell matrix, the steps include:
Thermoplasticity or thermosetting polymer polymer, electric conducting material, be placed in baking oven, be under 80 or 100 or 110 or 120 or 130 or 140 or 150 ℃ of conditions in temperature, oven dry 0.5 or 1.0 or 1.5 or 2.0 or 2.5 or 3.0h, described thermosetting or thermoplastic polyester are polyethylene, polypropylene, polybutadiene, polystyrene, Merlon, one or more combinations in ABS powder and section bar, electric conducting material is metallic lead, metal alloy, acetylene black, carbon black, graphite, carbon nano-tube, polyaniline, one or more combinations in sub-titanium oxide, the particle size range of electric conducting material is that nanoscale or nanoscale are to micron order.
Adopt the above mixed material of 30～100g, wherein thermoplasticity or thermosetting polymer polymer account for 60%～99.9%, electric conducting material accounts for 0.1%～40%, carry out preheating through 100～180 ℃, 0.1～10.0MPa precompressed, again through 100～240 ℃, 0.1～20MPa, 10～1200s hot pressing, cooling finally by 10～1800s, obtains nano composite material electrode plate matrix.
Described thermosetting in matrix 1 or thermoplastic polyester are one or more combinations in polyethylene, polypropylene, polybutadiene, polystyrene, Merlon, ABS powder and section bar.Preferably polyethylene, polypropylene, ABS powder and section bar.
Described thermoplasticity or thermosetting polymer polymer accounting 60～99%, electric conducting material accounting 1～40%.Optimum condition thermoplasticity or thermosetting polymer polymer accounting 75～90%, electric conducting material accounting 10～25%.
The condition of molding of described matrix 1 comprises and carries out preheating through 100～180 ℃, 0.1～10.0MPa precompressed, then through 100～240 ℃, 0.1～20MPa, 10～1200s hot pressing, and cooling finally by 10～1800s, obtains nano composite material electrode plate matrix.Optimum condition is 110～140 ℃ and carries out preheating, 0.5～5.0MPa precompressed, then through 160～230 ℃, 5.0～20MPa, 300～900s hot pressing, and cooling finally by 300～600s, obtains nano composite material bipolar plates matrix.
Matrix 1 thickness is 0.1 to 2.0mm.Preferably 0.5 arrive 1.4mm.
Described electric conducting material is one or more combinations in metallic lead, metal alloy, acetylene black, carbon black, graphite, carbon nano-tube, polyaniline, sub-titanium oxide.One or more combinations in preferable alloy lead, acetylene black, carbon black, graphite, carbon nano-tube, sub-titanium oxide.
The particle size range of described electric conducting material is that nanoscale or nanoscale are to micron order.
The hybrid mode of described material comprises that mechanical agitation is mixed, is manually uniformly mixed, ball milling disperses to mix, excusing from death disperses to mix.Preferably ball milling disperses to mix, has children outside the state plan and disperse to mix.
Embodiment 2
As shown in Figure 2 and Figure 3: the preparation technology of nano composite material bipolar cell matrix surface splash-proofing sputtering metal lead:
Hot-forming matrix 1 adopts vacuum magnetic-control sputtering technical finesse, the centre position that is metal targets is provided with balance coil, it is connected with power supply, the magnetic field that coil produces and the vacuum magnetic-control sputtering system of externally-applied magnetic field joint effect metal, complete the metallic lead sputter of matrix 1, obtain the Polar plate matrix of composite demand.
Described matrix 1 is as set forth in embodiment 1, and details as above.
Vacuum magnetic-control sputtering technology, operating pressure 10-6Pa, sputtering chamber temperature 50 C, argon flow amount 50, operating voltage 100V, operating current 1.8A, magnetic field 350Gs, operating frequency 30KHz, settling rate 0.3um/min, 20 ℃ of circulating cooling coolant-temperature gages, recirculated cooling water hydraulic pressure 0.2MPa, 26 ℃ of operational environments, relative humidity 30%RH.
Described sputtering layer thickness 0.05mm.
The above; it is only one of the specific embodiment of the present invention; but protection scope of the present invention is not limited to this; any those of ordinary skill in the art are in the disclosed technical scope of the present invention; the variation that can expect without creative work or replacement, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range that claims were limited.

Claims (6)

1. the preparation technology of a nano composite material bipolar battery and bipolar plates matrix thereof, comprise matrix (1), metal sputtering layer (2), nano composite material bipolar cell, it is characterized in that: described matrix (1) comprises thermosetting or thermoplastic polyester and one or more electric conducting materials composition, described electric conducting material is uniformly distributed in matrix (1), the electric conducting material being provided with in described matrix (1) is at least one or more combinations, the particle size range of described electric conducting material in nanoscale or nanometer to micron order, described metal sputtering layer (2) adopts the processing of metal vacuum magnetron sputtering technique, matrix after sputter is through being coated with cream, dry, solidify, assembling, obtain a kind of nano composite material bipolar cell.
2. the preparation technology of nano composite material bipolar battery according to claim 1 and bipolar plates matrix thereof, it is characterized in that: described matrix (1) adopts the processing of metal vacuum magnetron sputtering technique, the centre position that is metal targets is provided with balance coil, it is connected with power supply, the magnetic field that coil produces and the vacuum magnetic-control sputtering system of externally-applied magnetic field joint effect metal, complete the metal level sputter of matrix (1), obtain the Polar plate matrix (1) that contains satisfactory metal sputtering layer (2) in surface, metal targets (3) in described vacuum magnetic-control sputtering is metallic lead target or metallic lead alloy target material, described vacuum magnetic-control sputtering technology comprises operating pressure 10-5～10-7Pa, 30～50 ℃ of sputtering chamber temperature, argon flow amount 50～100, operating voltage 100～300V, operating current 1～10A, magnetic field 300～500Gs, operating frequency 10～80KHz, settling rate 0.1～1.0um/min, sputtering layer thickness 0.01～1.0mm, 0～30 ℃ of circulating cooling coolant-temperature gage, recirculated cooling water hydraulic pressure 0.1～0.5MPa, 20～40 ℃ of operational environments, relative humidity 10%～90%RH.
3. the preparation technology of nano composite material bipolar battery according to claim 1 and bipolar plates matrix thereof, it is characterized in that: described matrix (1) is through mold pressing or injection moulding process preparation, and described matrix (1) mould pressing method is through preheating, precompressed, hot pressing, cooling and the demoulding obtains, described preheating, precompressed, hot pressing, cooling and the demoulding all completes in mould, described preheat temperature is 100～180 ℃, described preload pressure is 0.1～10MPa, described hot pressing temperature is 100～240 ℃, described pressure is 0.1～20MPa, and described hot pressing time is 10～1200s, and be 10～1800s described cooling time, the described demoulding has release agent material in mould, comprises general neutrality, oiliness, dryness release agent, or spraying paraffin, spraying demoulding silica gel, oily material, or plating Teflon, described matrix (1) injection moulding process comprises batch mixing, dry, heating and melting, injection mo(u)lding, the demoulding, described batch mixing is thermoplasticity or thermosetting polymer polymer, one or more mixing in the mechanical agitation dispersion of electric conducting material process or artificial dispersed with stirring or excusing from death dispersion or ball milling dispersion disperse, described baking temperature is 100～200 ℃, described heating and melting temperature is 100～240 ℃, described injection mo(u)lding, by the material after heating is squeezed to mould, the Polar plate matrix (1) that is met requirement, described release method is as set forth in compression molding method.
4. the preparation technology of nano composite material bipolar battery according to claim 1 and bipolar plates matrix thereof, it is characterized in that: in described matrix (1), thermoplasticity or thermosetting polymer polymer comprise polyethylene, polypropylene, polybutadiene, polystyrene, Merlon, one or more combinations in ABS powder and section bar, in described matrix (1), electric conducting material is by conducting metal, a kind of or combination in nonmetallic materials, described conducting metal is metallic lead or metallic lead alloy, described nonmetallic materials are non-metal carbon material or macromolecule modified electric conducting material, described electric conducting material particle size range is nanoscale or nanometer to a kind of or combination in micron order.
5. the preparation technology of nano composite material bipolar battery according to claim 1 and bipolar plates matrix thereof, it is characterized in that: the accounting of described electric conducting material in matrix (1) is 0.1%～40%, thermosetting or the thermoplastic polyester accounting in matrix (1) is 60%～99.9%; Described electric conducting material is dispersed in matrix (1).
6. the preparation technology of nano composite material bipolar battery according to claim 1 and bipolar plates matrix thereof, is characterized in that: the thickness of described matrix (1) is at 0.1～2.0mm.
CN201410140421.4A 2014-04-09 2014-04-09 Nanocomposite bipolar storage battery and preparation process of bipolar plate matrix of nanocomposite bipolar storage battery Pending CN103887478A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104638282A (en) * 2015-02-04 2015-05-20 大连融科储能技术发展有限公司 Method, system and method for processing bipolar plate of low-contact resistor and bipolar plate of low-contact resistor
CN110224143A (en) * 2019-07-01 2019-09-10 清华大学深圳研究生院 Lead-acid battery collector, preparation method, pole plate and lead-acid battery
CN111987320A (en) * 2020-09-15 2020-11-24 天目湖先进储能技术研究院有限公司 Current collector with three-dimensional network three-dimensional structure and preparation method and application thereof

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104638282A (en) * 2015-02-04 2015-05-20 大连融科储能技术发展有限公司 Method, system and method for processing bipolar plate of low-contact resistor and bipolar plate of low-contact resistor
CN104638282B (en) * 2015-02-04 2018-06-08 大连融科储能技术发展有限公司 A kind of processing unit (plant), system, method and its bipolar plates for low contact resistance bipolar plates
CN110224143A (en) * 2019-07-01 2019-09-10 清华大学深圳研究生院 Lead-acid battery collector, preparation method, pole plate and lead-acid battery
CN111987320A (en) * 2020-09-15 2020-11-24 天目湖先进储能技术研究院有限公司 Current collector with three-dimensional network three-dimensional structure and preparation method and application thereof
CN111987320B (en) * 2020-09-15 2022-04-01 天目湖先进储能技术研究院有限公司 Current collector with three-dimensional network three-dimensional structure and preparation method and application thereof

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