WO2019059501A1 - Lead-acid battery electrode and lead-acid-based storage battery system comprising same - Google Patents
Lead-acid battery electrode and lead-acid-based storage battery system comprising same Download PDFInfo
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- WO2019059501A1 WO2019059501A1 PCT/KR2018/007386 KR2018007386W WO2019059501A1 WO 2019059501 A1 WO2019059501 A1 WO 2019059501A1 KR 2018007386 W KR2018007386 W KR 2018007386W WO 2019059501 A1 WO2019059501 A1 WO 2019059501A1
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- electrode
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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
- H01M4/14—Electrodes for lead-acid accumulators
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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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/06—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
- H01M4/66—Selection of materials
-
- 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
- H01M4/668—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
- 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
-
- 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
Definitions
- the present invention relates to a lead-acid battery cell system, and more particularly, to a lead-acid battery electrode having improved electrode lifetime and performance by forming a porous coating layer on the electrode surface, and a lead-acid battery cell system including the same.
- Portable rechargeable energy storage devices such as rechargeable electrochemical batteries and capacitors, are becoming increasingly essential as a driving force in the modern transportation and communications sector.
- a flooded lead-acid battery can be operated with a partial state of charge (PSoC), for example, approximately 50 to 80% charged state, It differs from the usual SLI (start, ignition, and ignition) that is activated.
- PSoC partial state of charge
- HEV hybrid electric vehicle
- a battery of a hybrid electric vehicle (HEV) can operate at PSoC, for example, at about 50 to 80% charge.
- HEV hybrid electric vehicle
- the improved lead-acid based battery system is a technology developed to improve the life of existing lead-acid batteries.
- the carbon mixture layer When the carbon mixture layer is applied to the surface, it prevents localized lead sulphate (PbSO 4 ) crystal growth due to the increased surface electrical conductivity, 2 / Pb to improve battery life.
- the lead crystal (Pb), which is an electrode active material changes to lead ion (Pb 2+ ).
- Pb 2+ ions form lead sulphate (PbSO 4 ) crystals during the discharge process.
- lead sulphate crystals grow, the contact area between the electrode surface and the electrolyte decreases and the surface electroconductivity decreases, forming a local electron transfer channel
- lead sulfate crystals are formed to a large extent, the utilization ratio of the electrode active material is decreased, and PbO 2 / Pb can not be returned to the electrolyte during the charging process.
- the carbon mixture layer is applied to the electrode surface, it is possible to prevent the local growth of lead sulfate crystals due to the increased surface electroconductivity and to recover PbO 2 / Pb and improve the life of the battery.
- the carbon layer is applied to the cathode electrode to prevent the electrolyte from flowing smoothly on the surface of the cathode.
- the cathode surface resistance Resulting in a problem that the capacity is rather lowered or the lifetime is shortened.
- an object of the present invention to provide an electrode for a lead-acid battery having a structure which can prevent the flow of an electrolyte generated due to a carbon layer coated on a lead-acid battery negative electrode,
- Another object of the present invention is to provide a lead acid storage battery system in which the capacity of a cathode electrode can be improved and the system life can be improved by employing an electrode having a structure in which an electrolyte can smoothly contact an electrode.
- the present invention provides an electrode support comprising: an electrode; And a water soluble polymer-containing carbon layer formed on the surface of the support.
- the water soluble polymer-containing carbon layer includes a high specific surface area carbon material, a high conductivity carbon material, a water soluble polymer and a binder.
- the water soluble polymer is included in an amount of 1 to 30 parts by weight per 100 parts by weight of the sum of the high specific surface area carbon material, the high conductivity carbon material and the binder.
- the high specific surface area carbon material, the high conductivity carbon material, and the binder are 25 to 80 wt%, 15 to 70 wt%, and 1 to 40 wt%, respectively, of the total content.
- the size of the water-soluble polymer is 0.1 ⁇ m to 100 ⁇ m.
- the high specific surface area carbon material has a specific surface area of 500 to 3,000 m 2 / g.
- the highly conductive carbon material has an electric conductivity of 20 S / m or more.
- the binder is at least one selected from the group consisting of polyester, PET, PTFE, PVdF, and CMC.
- the water soluble polymer is selected from the group consisting of polyvinyl alcohol (PVA), polyacrylic acid (PAA), polyvinyl pyrrolidone (PVP) Or more.
- PVA polyvinyl alcohol
- PAA polyacrylic acid
- PVP polyvinyl pyrrolidone
- the water soluble polymer-containing carbon layer is formed to a thickness of 10 ⁇ to 500 ⁇ .
- the water soluble polymer-containing carbon layer when the water soluble polymer-containing carbon layer is brought into contact with the electrolytic solution, the water soluble polymer is dissolved to form pores.
- the present invention also provides a lead-acid based battery system comprising any one of the electrodes described above.
- the electrode is a cathode.
- the electrode for a lead-acid battery of the present invention forms pores in the carbon layer so that the electrolyte moves more smoothly through the carbon layer, thereby reducing the resistance and improving the capacity of the battery.
- the lead-acid battery system of the present invention can improve the capacity of the cathode electrode and improve the life of the system by adopting the electrode having a structure in which the electrolyte can smoothly contact with the electrode, thereby realizing a secondary battery having excellent cycle performance have.
- FIG. 1 is a graph showing a capacity evaluation test result using an electrode for a lead-acid battery obtained according to an embodiment of the present invention.
- FIG. 2 is a graph of a life evaluation test result using an electrode for a lead-acid battery obtained according to an embodiment of the present invention.
- the technical feature of the present invention resides in an electrode for a lead-acid battery having a structure in which a plurality of pores can be formed in a carbon layer when an electrolyte and a carbon layer are brought into contact with each other by including a water-soluble polymer in a carbon layer formed on an electrode surface of a lead-
- the present invention provides an electrode support comprising: an electrode; And a water soluble polymer-containing carbon layer formed on the surface of the support.
- the water soluble polymer-containing carbon layer may comprise a high specific surface area carbon material, a high conductivity carbon material, a water soluble polymer and a binder.
- the water-soluble polymer is a certain amount of the carbon material, and can be contained in an amount of 1 to 30 parts by weight per 100 parts by weight of the total amount of the high specific surface area carbon material, the high conductivity carbon material and the binder.
- the weight ratio is determined experimentally. If the weight ratio is less than the above-mentioned range, there is a problem that pores are formed too little and the surface resistance is not reduced. If the weight ratio is exceeded, the viscosity becomes too high, The polymer-containing coating layer may be detached.
- the high specific surface area carbon material may be 25 to 80 wt%, the high conductivity carbon material may be 15 to 70 wt%, and the binder may be 1 to 40 wt%. If the weight ratio of the binder in the weight ratio is less than the specified weight ratio, there is a problem of falling off of the active material. If the weight ratio of the binder is less than the specified weight ratio, the electrolyte may not permeate through the carbon coating layer.
- the water-soluble polymer is not limited as long as it dissolves well in a polar solvent such as water, ethanol and the like.
- a polar solvent such as water, ethanol and the like.
- the high specific surface area carbon material may be a carbon material having a specific surface area of 500 to 3,000 m 2 / g. If the specific surface area of the high specific surface area carbon material is less than 500 m 2 / g, There is a problem in that the electrode performance is deteriorated because it is not penetrated into the inside, and hydrogen generation is promoted due to excessive specific surface area exceeding 3,000 m 2 / g, so that the reduction of the electrolyte becomes extreme and the life of the electrode is reduced.
- the high specific surface area carbon material used in the present invention may be any of known carbon materials as long as it is within the specific surface area described above, and may be activated carbon, carbon black, acetylene black or a combination thereof in one embodiment.
- the scattering of the carbon material causes the stability of the working process to be very low, and the electrode layer having a size of more than 100 mu m Since uniform mixing is not achieved in constituting the slurry to be formed.
- the highly conductive carbon material may be a carbon material having an electric conductivity of 20 S / m or more. If the electric conductivity of the highly conductive carbon material is less than 20 S / m, the electric conductivity of the carbon active material decreases, to be.
- the highly conductive carbon material used in the present invention may be any known carbon material as long as it is in the range of the above-mentioned electric conductivity, in one embodiment may be graphite, graphene, carbon nanotube or a combination thereof .
- Highly Conductive Carbon Material Powders of the same size as the high specific surface area carbon material may also be used.
- the binder may be any known polymeric material for the binder, and may be at least one selected from the group consisting of, for example, polyester, PET, PTFE, PVdF, and CMC. Particularly, since the binder must be uniformly mixed with the carbon material, it can be used in a mixed state with the solvent.
- the water-soluble polymer-containing carbon layer can be formed by dip coating on the electrode after preparing the electrode coating slurry containing the above-mentioned components.
- the water-soluble polymer contained in the electrode coating slurry is dissolved in the slurry solution in the slurry state After coating on the electrode, it is dried in the coating layer on the electrode surface and crystallized again.
- the porous electrode can be realized in which the electrode is in contact with the electrolytic solution to dissolve the water-soluble polymer in the electrolytic solution, thereby forming pores as large as the crystal size of the aqueous polymer.
- the thickness of the water-soluble polymer-containing carbon layer coated on the electrode may be 10 to 500 ⁇ . If the thickness is less than 10 ⁇ , meaningful performance of the carbon coating can not be expected. If the thickness is 500 ⁇ or more, This is because the surface of the electrode is clogged and the electrode performance may deteriorate.
- the lead-acid battery electrode of the present invention is produced by preparing a slurry for electrode coating with a water-soluble polymer-containing carbon layer slurry, dip coating the lead electrode slurry in an electrode coating slurry, For 0.5 to 10 hours for drying to obtain a water soluble polymer-containing carbon layer.
- the slurry for electrode coating may include a carbon material (including a weight ratio of activated carbon and graphite of 1: 1), a binder, and a water-soluble polymer solution.
- a water-soluble polymer solution containing 10% by weight of a water-soluble polymer in distilled water as a solvent was mixed together to prepare a water-soluble polymer-containing carbon layer slurry so that the total solid concentration was 40% by weight.
- the lead-acid based battery system of the present invention includes the electrode described above. That is, the electrode plate having the above-described structure may be implemented as a secondary battery including at least one of a cathode electrode and a cathode electrode.
- the anode of the present invention may be used for both the anode and the cathode, It is possible to implement a secondary battery with a structure impregnated with sulfuric acid.
- the lead-acid based battery system of the present invention can implement the above-described electrode as a cathode.
- Activated carbon as high specific surface area carbon and graphite as high electric conductivity carbon were selected, and activated carbon and graphite were pulverized to prepare powders having a size of 10-30 ⁇ .
- PVA was selected as a water-soluble polymer and dissolved in water to prepare a 10 wt% solution.
- An electrode having a water-soluble polymer-containing carbon layer having a thickness of 50 ⁇ ⁇ was prepared through dip coating using a slurry for electrode coating on a fused electrode plate.
- Example 1 The electrode obtained in Example 1 was used as a cathode electrode, fixed to a case using a positive electrode and a separator, and impregnated with a sulfuric acid solution having a specific gravity of 1.3 to prepare a unit cell.
- a comparative electrode was prepared in the same manner as in Example 1, except that the water-soluble polymer was not added.
- a comparative unit cell was prepared in the same manner as in Example 2, except that the comparative anode was used as the cathode electrode.
- the capacity was evaluated by charging until it reached 2.45 V with a current of 0.1 C (10 hour current), leaving it for 10 minutes for voltage and temperature stabilization, then discharging at a current of 0.1 C until reaching 1.75 V Respectively.
- FIG. 1 shows only the results of the discharge. As shown in FIG. 1, the capacity of the unit cell including the electrode obtained according to the present invention is improved.
- the life cycle is evaluated by charging each unit cell at a current of 0.1 C and charging it at 0.5 C (2 hour current) for 61 seconds. The discharge for 60 seconds was repeated at 0.5C. The cycle was terminated when the discharge end voltage reached 1.2V.
Abstract
Description
Claims (13)
- 납으로 구성된 전극지지체; 및 An electrode support composed of lead; And상기 지지체 표면에 형성되는 수용성고분자포함카본층;을 포함하는 납산전지용 전극. And a water soluble polymer-containing carbon layer formed on the surface of the support.
- 제 1 항에 있어서,The method according to claim 1,상기 수용성고분자포함카본층은 고비표면적 카본재료, 고전도성 카본재료, 수용성고분자 및 바인더를 포함하는 것을 특징으로 하는 납산전지용 전극.Wherein the water soluble polymer-containing carbon layer comprises a high specific surface area carbon material, a high conductivity carbon material, a water soluble polymer, and a binder.
- 제 2 항에 있어서,3. The method of claim 2,상기 수용성고분자는 상기 고 비표면적 카본재료, 고 전도성 카본재료 및 바인더의 합산함량 100중량부당 1 내지 30중량부 포함되는 것을 특징으로 하는 납산전지용 다층구조상 전극.Wherein the water soluble polymer is contained in an amount of 1 to 30 parts by weight per 100 parts by weight of the sum of the high specific surface area carbon material, the high conductivity carbon material and the binder.
- 제 3 항에 있어서,The method of claim 3,상기 합산함량 중 상기 고 비표면적 카본 재료는 25 내지 80 중량%, 상기 고 전도성 카본 재료는 15 내지 70중량%, 및 바인더는 1 내지 40중량%인 것을 특징으로 하는 납산전지용 다층구조상 전극.Wherein the high specific surface area carbon material, the high conductivity carbon material, and the binder are contained in an amount of 25 to 80 wt%, 15 to 70 wt%, and 1 to 40 wt%, respectively, in the total content.
- 제 1 항에 있어서,The method according to claim 1,상기 수용성고분자의 크기는 0.1 μm 내지 100 μm인 것을 특징으로 하는 납산전지용 전극.Wherein the water-soluble polymer has a size of 0.1 μm to 100 μm.
- 제 1 항 내지 제 5 항 중 어느 한 항에 있어서, 6. The method according to any one of claims 1 to 5,상기 고비표면적 카본재료는 비표면적이 500 내지 3,000 m2/g인 것을 특징으로 하는 납산전지용 전극.Wherein the high specific surface area carbon material has a specific surface area of 500 to 3,000 m 2 / g.
- 제 1 항 내지 제 5 항 중 어느 한 항에 있어서,6. The method according to any one of claims 1 to 5,상기 고전도성 카본재료는 전기전도도가 20S/m이상인 것을 특징으로 하는 납산전지용 전극.Wherein the high conductivity carbon material has an electric conductivity of 20 S / m or more.
- 제 1 항 내지 제 5 항 중 어느 한 항에 있어서,6. The method according to any one of claims 1 to 5,상기 바인더는 폴리에스테르, PET, PTFE, PVdF, CMC로 구성된 그룹에서 선택되는 1개 이상인 것을 특징으로 하는 납산전지용 전극.Wherein the binder is at least one selected from the group consisting of polyester, PET, PTFE, PVdF, and CMC.
- 제 1 항 내지 제 5 항 중 어느 한 항에 있어서,6. The method according to any one of claims 1 to 5,상기 수용성고분자는 폴리비닐알코올(Poly vinyl alcohol, PVA), 폴리아크릴산(poly acrylic acid, PAA), 폴리비닐 피롤리돈(Poly vinyl pyrrolidone, PVP)으로 구성된 그룹에서 선택되는 1개 이상인 것을 특징으로 하는 납산전지용 전극.Wherein the water soluble polymer is at least one selected from the group consisting of polyvinyl alcohol (PVA), polyacrylic acid (PAA), and polyvinyl pyrrolidone (PVP) Electrodes for lead acid batteries.
- 제 1 항 내지 제 5 항 중 어느 한 항에 있어서,6. The method according to any one of claims 1 to 5,상기 수용성고분자포함카본층은 10㎛ 내지 500㎛ 두께로 형성되는 것을 특징으로 하는 납산전지용 전극.Wherein the water soluble polymer-containing carbon layer is formed to a thickness of 10 탆 to 500 탆.
- 제 1 항 내지 제 5 항 중 어느 한 항에 있어서,6. The method according to any one of claims 1 to 5,상기 수용성고분자포함카본층은 전해액과 접촉시 상기 수용성고분자가 용해되어 기공이 형성되는 것을 특징으로 하는 납산전지용 전극.Wherein the water soluble polymer-containing carbon layer dissolves in contact with the electrolytic solution to form pores.
- 제 1 항 내지 제 5 항 중 어느 한 항의 전극을 포함하는 납산 기반 축전지 시스템.A lead-acid based battery system comprising the electrode of any one of claims 1 to 5.
- 제 12 항에 있어서,13. The method of claim 12,상기 전극은 음극인 것을 특징으로 하는 납산 기반 축전지 시스템.Wherein the electrode is a negative electrode.
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KR10-2017-0123633 | 2017-09-25 | ||
KR1020170123633A KR20190034974A (en) | 2017-09-25 | 2017-09-25 | Electrode for lead acid battery and lead acid battery system comprising the electrode |
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Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH08180857A (en) * | 1994-12-26 | 1996-07-12 | Shin Kobe Electric Mach Co Ltd | Electrode plate for lead-acid battery |
JP2001236952A (en) * | 2000-02-22 | 2001-08-31 | Yuasa Corp | Negative electrode plate for lead battery |
JP2003051306A (en) * | 2001-08-07 | 2003-02-21 | Furukawa Battery Co Ltd:The | Negative electrode for lead-acid battery |
JP2009259803A (en) * | 2008-03-24 | 2009-11-05 | Nippon Zeon Co Ltd | Electrode for lead storage cell, and lead storage cell |
JP2011071110A (en) * | 2009-08-27 | 2011-04-07 | Furukawa Battery Co Ltd:The | Method of manufacturing compound capacitor negative electrode plate for lead-acid battery, and the lead-acid battery |
-
2017
- 2017-09-25 KR KR1020170123633A patent/KR20190034974A/en active Application Filing
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2018
- 2018-06-29 WO PCT/KR2018/007386 patent/WO2019059501A1/en active Application Filing
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH08180857A (en) * | 1994-12-26 | 1996-07-12 | Shin Kobe Electric Mach Co Ltd | Electrode plate for lead-acid battery |
JP2001236952A (en) * | 2000-02-22 | 2001-08-31 | Yuasa Corp | Negative electrode plate for lead battery |
JP2003051306A (en) * | 2001-08-07 | 2003-02-21 | Furukawa Battery Co Ltd:The | Negative electrode for lead-acid battery |
JP2009259803A (en) * | 2008-03-24 | 2009-11-05 | Nippon Zeon Co Ltd | Electrode for lead storage cell, and lead storage cell |
JP2011071110A (en) * | 2009-08-27 | 2011-04-07 | Furukawa Battery Co Ltd:The | Method of manufacturing compound capacitor negative electrode plate for lead-acid battery, and the lead-acid battery |
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