CN111342052A - Lithium ion battery with low manufacturing cost and long cycle life and manufacturing method thereof - Google Patents

Lithium ion battery with low manufacturing cost and long cycle life and manufacturing method thereof Download PDF

Info

Publication number
CN111342052A
CN111342052A CN202010223478.6A CN202010223478A CN111342052A CN 111342052 A CN111342052 A CN 111342052A CN 202010223478 A CN202010223478 A CN 202010223478A CN 111342052 A CN111342052 A CN 111342052A
Authority
CN
China
Prior art keywords
pole piece
coating
negative
positive
current collector
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
CN202010223478.6A
Other languages
Chinese (zh)
Inventor
黄耀泽
黄碧英
萨多威.R.唐纳德
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Longneng Technology Nantong Co ltd
Original Assignee
Longneng Technology Nantong Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Longneng Technology Nantong Co ltd filed Critical Longneng Technology Nantong Co ltd
Priority to CN202010223478.6A priority Critical patent/CN111342052A/en
Publication of CN111342052A publication Critical patent/CN111342052A/en
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • 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
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • 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
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/058—Construction or manufacture
    • H01M10/0585—Construction or manufacture of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators
    • 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
    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • H01M4/136—Electrodes based on inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy
    • 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
    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • H01M4/139—Processes of manufacture
    • H01M4/1397—Processes of manufacture of electrodes based on inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy
    • 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
    • H01M4/663—Selection of materials containing carbon or carbonaceous materials as conductive part, e.g. graphite, carbon fibres
    • 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
    • H01M4/70—Carriers or collectors characterised by shape or form
    • H01M4/72—Grids
    • H01M4/74—Meshes or woven material; Expanded metal
    • H01M4/745—Expanded metal
    • 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
    • H01M2004/026—Electrodes composed of, or comprising, active material characterised by the polarity
    • H01M2004/028—Positive electrodes
    • 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 relates to a lithium ion battery with low manufacturing cost and long cycle life and a manufacturing method thereof. The super-thick positive/negative electrode porous pole piece is prepared, and meanwhile, a carbon-coated aluminum/copper-based current collector net is adopted, and the porous structure of the coating enables the electrode to obtain electrochemical properties such as high energy density, high multiplying power, long cycle life and the like; on the other hand, the use of the new process greatly reduces the cost of materials, manpower, electric power and equipment in the manufacturing process of the battery cell. The battery core manufactured by the invention has excellent performance, and can be assembled and matched on the body of a pure electric passenger car to realize the characteristics of 4C charging and 10C discharging at normal temperature. The cycle life of the system reaches 8000 times, the one-time pure electric mode has the endurance mileage of 520 kilometers and the maximum speed of 176 kilometers per hour.

Description

Lithium ion battery with low manufacturing cost and long cycle life and manufacturing method thereof
Technical Field
The invention belongs to the technical field of lithium ion batteries, and particularly relates to a lithium ion battery with low manufacturing cost and long cycle life and a manufacturing method thereof.
Background
With the progress of science and technology and the requirement of environmental protection, compared with a Ni-H, Ni-Cr battery, the lithium ion battery has no memory effect, higher energy density and longer service life, and the factors enable the lithium ion battery to be widely applied.
The current process for large scale manufacturing of lithium ion batteries mainly comprises the following steps: preparing electrode slurry, coating and drying, preparing a sheet, baking a pole piece, winding a positive/negative pole piece and a diaphragm in a combined manner or assembling a battery cell by lamination, baking and injecting dry battery cells, forming and grading. In the coating process of preparing the electrode plate, aluminum foil and copper foil are basically used as a positive/negative electrode attachment. With the gradual maturity and stability of related manufacturing process technologies, the traditional technology encounters a bottleneck in the aspect of improving the performance of the lithium ion battery, and particularly the manufacturing of the power lithium ion battery cannot completely meet the requirements of the power lithium ion battery on cost, specific energy, specific power, cycle life, low internal resistance and the like. Therefore, how to develop a lithium ion power battery for vehicles, which has the advantages of low cost, high specific energy, high safety, low internal resistance and long service life, is a problem to be solved urgently in the industry.
Disclosure of Invention
In order to solve the problems, the invention provides a lithium ion battery with low manufacturing cost and long cycle life and a manufacturing method thereof.
The technical scheme of the invention is as follows:
a lithium ion battery with low manufacturing cost and long cycle life comprises an aluminum shell and a naked electric core, wherein the naked electric core is arranged in the aluminum shell, and electrolyte is injected into the aluminum shell; the bare cell is composed of a ceramic diaphragm, a porous positive pole piece and a porous negative pole piece lamination, wherein the porous positive pole piece comprises a positive pole current collector and positive pole coating films arranged on two sides of the positive pole current collector, and the porous negative pole piece comprises a negative pole current collector and negative pole coating films arranged on two sides of the negative pole current collector; the anode current collector is a special carbon-coated aluminum net, the special carbon-coated aluminum net comprises an aluminum net, and two surfaces of the aluminum net are respectively provided with a conductive carbon coating; the negative current collector is a high-conductivity copper mesh; the ceramic diaphragm comprises a diaphragm, the porosity of the diaphragm is more than or equal to 40%, and a ceramic coating is arranged on the diaphragm.
The aluminum mesh is made of aluminum foil through punching, a layer of conductive slurry is uniformly coated on the aluminum mesh, the thickness is controlled to be 0.5-6um, and the conductive carbon coating is obtained after drying for 2 hours at 80 ℃ under the vacuum condition.
The conductive slurry: mainly SUPPER-P, and mixing it with H2O, PAA mixing to obtain the desired conductive slurry.
The diaphragm is a composite diaphragm of more than two of PP diaphragm, PE diaphragm, PEP diaphragm, polyamide diaphragm, polyimide diaphragm and non-woven fabric.
Uniformly coating ceramic slurry on the diaphragm and drying to obtain the ceramic coating; the thickness of the ceramic coating is 0.5-6 um.
The ceramic slurry comprises: mixing nanoscale aluminium oxide powder and nanoscale zirconium oxide powder according to the weight ratio of 1: 1 proportion, adding NMP and PVDF, and uniformly mixing to prepare ceramic slurry.
The electrolyte is a solution consisting of high-purity lithium salt and multi-component carbonate, wherein the lithium salt is one or more of lithium hexafluorophosphate, lithium bis (oxalato) borate and lithium tetrafluoroborate; the carbonate is at least two of ethylene carbonate, propylene carbonate, butylene carbonate, monofluoroethylene carbonate, gamma-butyrolactone, dimethyl carbonate, diethyl carbonate, ethyl methyl carbonate and methyl propyl carbonate.
The manufacturing method of the lithium ion battery comprises the following steps:
1) adding 50-60% of positive active substance, 10-15% of binder, 3-5% of conductive agent and 20-25% of macromolecular plasticizer into acetone solution, and uniformly stirring for 10min to obtain uniform slurry; the obtained slurry is heated by a coating machine and then is self-formed into a positive coating film, and the thickness of the positive coating film is controlled between 200 and 1500 mu m; drying the obtained anode coating film at 50-100 ℃ for 2-4h under vacuum condition to completely remove acetone; placing a positive current collector between the two dried positive coating films, and then connecting the positive current collector and the positive coating films on the two sides of the positive current collector into a whole through a hot pressing process to form a positive pole piece; soaking the obtained pole piece in IPA solution to extract macromolecular plasticizer in the pole piece coating; and drying the obtained pole piece for 2-4h at 80-100 ℃ under a vacuum condition to obtain the porous positive pole piece.
2) Adding 50-60% of negative active material, 10-15% of binder, 4-8% of conductive and 20-25% of macromolecular plasticizer into acetone solution, and uniformly stirring for 10min to obtain uniform slurry; the obtained slurry is heated by a coating machine to form a self-film into a negative coating film by the coating machine, and the thickness of the negative coating film is controlled between 200 and 1500 mu m; drying the obtained negative coating film at 50-100 ℃ for 2-4h under vacuum condition to completely remove acetone; placing a negative current collector between the two dried negative coating films, and then connecting the negative current collector and the negative coating films on the two sides of the negative current collector into a whole through a hot pressing process to form a negative pole piece; soaking the obtained pole piece in IPA solution to extract macromolecular plasticizer in the pole piece coating; and drying the obtained pole piece for 2-4h at 80-100 ℃ under a vacuum condition to obtain the porous negative pole piece.
3) And (3) performing Z-shaped lamination on the porous positive pole piece, the porous negative pole piece and the ceramic diaphragm, and performing welding, shelling, welding, drying and electrolyte injection to finally obtain the lithium ion battery.
The plasticizer is PTP or DBP or DOP or DIDP; the conductive agent is at least one of KS6, carbon nano tube, VGCF, graphene and Super-P; the positive active material is at least one of lithium cobaltate, lithium manganate, ternary nickel cobalt manganese, lithium iron phosphate and nickel cobalt aluminum; the negative active material is at least one of lithium titanate, mesocarbon microbeads and artificial graphite (including hard carbon and soft carbon).
Preferably, the battery of the invention is a prismatic aluminum-shell battery, and can also be a prismatic battery or a cylindrical battery with other shells.
The invention has reasonable design and ingenious conception, and has the following beneficial effects:
1) the energy density is high: the porous metal electrode mesh is adopted to replace the original metal electrode foil, and meanwhile, the thickness of the electrode active coating is increased by multiple times, so that the unit energy density is obviously improved.
2) The rate capability is high: the conductive carbon coating is coated on the surface of the metal electrode mesh, so that the electrical conductivity between the electrode active coating and the metal electrode can be improved, the rate performance of the electrode can be improved, and on the other hand, the porous structure formed in the electrode active coating is beneficial to fully soaking electrolyte into the electrode coating and Li in the charge-discharge process+Thereby improving the rate capability of the electrode.
3) Long cycle life: the surface of the metal electrode mesh is coated with a conductive carbon coating which can enhance the adhesion between the active coating and the metal current collector; on the other hand, the active coatings on the two sides of the metal current collector are bonded together through the holes in the metal mesh after hot pressing, so that the bonding between the coatings and the metal current collector is firmer. And the porous structure in the active coating can absorb the volume change of the active material in the charge/discharge process, thereby further improving the cycle service life of the electrode.
4) The cost is low: because the porous electrode current collector and the internal structure of the porous coating are adopted, the thickness of the electrode active coating can be made to be large without reducing the electrochemical performance of the electrode, so that the using quantity of the metal current collectors can be obviously reduced, the number of times of lamination of the battery cells under the same battery cell energy is obviously reduced, and the material cost, the labor cost and the equipment cost are obviously reduced.
Drawings
Fig. 1 is a schematic view of a structure of a positive/negative electrode current collector.
Fig. 2 is a schematic cross-sectional view of a porous positive/negative electrode sheet.
Fig. 3 is a charge-discharge curve diagram (1) of the lithium ion battery in the example.
Fig. 4 is a high-rate charge-discharge cycle life graph (2) of the lithium ion battery in the example.
Detailed Description
Examples
The manufacturing method of the lithium ion battery with low manufacturing cost and long cycle life comprises the following steps:
1) preparing a positive current collector:
the conventionally used aluminum foil is punched to be made into an aluminum net, the smoothness of the punched edge is particularly required to be paid attention to, and burrs are not required; and then uniformly coating a layer of conductive slurry on two surfaces of the aluminum mesh, controlling the thickness of the coating to be between 0.5 and 6 microns, and drying for 2 hours at 80 ℃ under a vacuum condition to obtain the positive current collector. The preparation process of the conductive slurry comprises the steps of taking SUPPER-P as a main material, and mixing the SUPPER-P with H2O and PAA uniformly to obtain the required conductive slurry.
2) Preparing a porous positive pole piece:
the anode material adopts nano-scale LiFePO4PVDF-HFP is adopted as a binder of the powder, SP-Carbon is adopted as a conductive agent, and DBP is adopted as a plasticizer. Adding 21g of positive active material, 6g of binder, 1.1g of conductive agent and 9.36g of plasticizer into 45ml of acetone solution, continuously stirring for 10min to obtain uniform positive slurry, heating the obtained slurry by a coating machine to form a positive coating film, controlling the thickness of the positive coating film to 600um, drying the obtained positive coating film at 80 ℃ for 2h under a vacuum condition to completely remove acetone, placing a positive current collector between the two dried positive coating films, and then performing a hot pressing process to connect the carbon-coated aluminum mesh and the positive coating films on the two sides of the carbon-coated aluminum mesh into a whole to form a positive pole piece; and (3) soaking the positive plate in IPA (isopropyl alcohol) solution, extracting DBP (DBP) in the coating of the positive plate, and drying the positive plate for 2 hours at 100 ℃ under a vacuum condition to obtain the porous positive plate.
3) Preparing a porous negative pole piece:
the cathode material adopts nano Carbon microsphere powder, the binder adopts PVDF-HFP, the conductive agent adopts SP-Carbon, and the plasticizer adopts DBP. Adding 44g of negative electrode active material, 11.8g of binder, 4.7g of conductive agent and 18g of plasticizer into 95ml of acetone solution, continuously stirring for 10min to obtain uniform negative electrode slurry, heating the obtained slurry by a coating machine to form a negative electrode coating film, controlling the thickness of the negative electrode coating film to be 1000um, drying the obtained negative electrode coating film at 80 ℃ for 2h under a vacuum condition for completely removing acetone, placing a negative electrode current collector between the two dried negative electrode coating films, and then performing a hot pressing process to connect the copper mesh and the negative electrode coating films on the two sides of the copper mesh into a whole to form a negative electrode plate; and soaking the negative pole piece in IPA (isopropyl alcohol) solution, extracting DBP from the pole piece coating, and drying the pole piece at 100 ℃ for 2h under a vacuum condition to obtain the porous negative pole piece.
4) Preparing a ceramic diaphragm:
the nano-scale aluminum oxide particle powder and the nano-scale zirconium oxide particle powder are proportioned according to the following proportion, Al2O3:ZrO2: PVDF: NMP = 20: 20: 5: and 55, mixing the mixture into ceramic slurry by adopting a stirrer, uniformly coating 2um of the ceramic slurry on the battery diaphragm by using a coating machine, drying and cutting the ceramic slurry into the ceramic diaphragm used by the battery.
5) Preparing an electric core:
the prepared positive and negative pole pieces and diaphragms are subjected to Z-shaped lamination, and are subjected to welding, shell entering, welding, drying and liquid injection to finally prepare the battery in the scheme.
The battery is assembled on the body of the pure electric passenger car, and the characteristics of 4C charging and 10C discharging are realized at normal temperature; the cycle life of the system reaches 8000 times, the one-time pure electric mode has the endurance mileage of 520 kilometers and the maximum speed of 176 kilometers per hour.
The above-mentioned embodiments only express one embodiment of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (9)

1. A lithium ion battery with low manufacturing cost and long cycle life comprises an aluminum shell and a naked electric core, wherein the naked electric core is arranged in the aluminum shell, and electrolyte is injected into the aluminum shell; the bare cell is composed of a ceramic diaphragm, a porous positive pole piece and a porous negative pole piece lamination, wherein the porous positive pole piece comprises a positive pole current collector and positive pole coating films arranged on two sides of the positive pole current collector, and the porous negative pole piece comprises a negative pole current collector and negative pole coating films arranged on two sides of the negative pole current collector; the anode current collector is a special carbon-coated aluminum net, the special carbon-coated aluminum net comprises an aluminum net, and two surfaces of the aluminum net are respectively provided with a conductive carbon coating; the negative current collector is a high-conductivity copper mesh; the ceramic diaphragm comprises a diaphragm, the porosity of the diaphragm is more than or equal to 40%, and a ceramic coating is arranged on the diaphragm.
2. The lithium ion battery of claim 1, wherein the aluminum mesh is made of aluminum foil by punching, a layer of conductive slurry is uniformly coated on the aluminum mesh, the thickness is controlled to be 0.5-6um, and the conductive carbon coating is obtained after drying for 2h at 80 ℃ under a vacuum condition.
3. The lithium ion battery of claim 2, wherein the conductive slurry: mainly SUPPER-P, and mixing it with H2O, PAA mixing to obtain the desired conductive slurry.
4. The lithium ion battery of claim 1, wherein the separator is one of a PP separator, a PE separator, a PEP separator, a polyamide separator, a polyimide separator, and a nonwoven fabric, and is a composite separator of two or more kinds.
5. The lithium ion battery with low manufacturing cost and long cycle life according to claim 1, characterized in that, ceramic slurry is uniformly coated on the separator and dried to obtain the ceramic coating; the thickness of the ceramic coating is 0.5-6 um.
6. The lithium ion battery of claim 5, wherein the ceramic slurry: mixing nanoscale aluminium oxide powder and nanoscale zirconium oxide powder according to the weight ratio of 1: 1 proportion, adding NMP and PVDF, and uniformly mixing to prepare ceramic slurry.
7. The lithium ion battery of claim 1, wherein the electrolyte is a solution of a high purity lithium salt and a polycarbonate, wherein the lithium salt is one or more of lithium hexafluorophosphate, lithium bis (oxalato) borate and lithium tetrafluoroborate; the carbonate is at least two of ethylene carbonate, propylene carbonate, butylene carbonate, monofluoroethylene carbonate, gamma-butyrolactone, dimethyl carbonate, diethyl carbonate, ethyl methyl carbonate and methyl propyl carbonate.
8. The method for manufacturing a lithium ion battery according to any one of claims 1 to 7, characterized in that it comprises the steps of:
1) adding 50-60% of positive active substance, 10-15% of binder, 3-5% of conductive agent and 20-25% of macromolecular plasticizer into acetone solution, and uniformly stirring for 10min to obtain uniform slurry; the obtained slurry is heated by a coating machine and then is self-formed into a positive coating film, and the thickness of the positive coating film is controlled between 200 and 1500 mu m; drying the obtained anode coating film at 50-100 ℃ for 2-4h under vacuum condition to completely remove acetone; placing a positive current collector between the two dried positive coating films, and then connecting the positive current collector and the positive coating films on the two sides of the positive current collector into a whole through a hot pressing process to form a positive pole piece; soaking the obtained pole piece in IPA solution to extract macromolecular plasticizer in the pole piece coating; drying the obtained pole piece for 2-4h at 50-100 ℃ under a vacuum condition to obtain a porous positive pole piece;
2) adding 50-60% of negative active material, 10-15% of binder, 4-8% of conductive and 20-25% of macromolecular plasticizer into acetone solution, and uniformly stirring for 10min to obtain uniform slurry; the obtained slurry is heated by a coating machine to form a self-film into a negative coating film by the coating machine, and the thickness of the negative coating film is controlled between 200 and 1500 mu m; drying the obtained negative coating film at 50-100 ℃ for 2-4h under vacuum condition to completely remove acetone; placing a negative current collector between the two dried negative coating films, and then connecting the negative current collector and the negative coating films on the two sides of the negative current collector into a whole through a hot pressing process to form a negative pole piece; soaking the obtained pole piece in IPA solution to extract macromolecular plasticizer in the pole piece coating; drying the obtained pole piece for 2-4h at 50-100 ℃ under a vacuum condition to obtain a porous negative pole piece;
3) and (3) performing Z-shaped lamination on the porous positive pole piece, the porous negative pole piece and the ceramic diaphragm, and performing welding, shelling, welding, drying and electrolyte injection to finally obtain the lithium ion battery.
9. The method of manufacturing according to claim 7, wherein the plasticizer is PTP or DBP or DOP or DIDP; the conductive agent is at least one of KS6, carbon nano tube, VGCF, graphene and Super-P; the positive active material is at least one of lithium cobaltate, lithium manganate, ternary nickel cobalt manganese, lithium iron phosphate and nickel cobalt aluminum; the negative active material is at least one of lithium titanate, mesocarbon microbeads and artificial graphite.
CN202010223478.6A 2020-03-26 2020-03-26 Lithium ion battery with low manufacturing cost and long cycle life and manufacturing method thereof Withdrawn CN111342052A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010223478.6A CN111342052A (en) 2020-03-26 2020-03-26 Lithium ion battery with low manufacturing cost and long cycle life and manufacturing method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010223478.6A CN111342052A (en) 2020-03-26 2020-03-26 Lithium ion battery with low manufacturing cost and long cycle life and manufacturing method thereof

Publications (1)

Publication Number Publication Date
CN111342052A true CN111342052A (en) 2020-06-26

Family

ID=71182569

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010223478.6A Withdrawn CN111342052A (en) 2020-03-26 2020-03-26 Lithium ion battery with low manufacturing cost and long cycle life and manufacturing method thereof

Country Status (1)

Country Link
CN (1) CN111342052A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115148508A (en) * 2022-08-08 2022-10-04 凌容新能源科技（上海）股份有限公司 Energy storage capacitor and preparation method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115148508A (en) * 2022-08-08 2022-10-04 凌容新能源科技（上海）股份有限公司 Energy storage capacitor and preparation method thereof

Similar Documents

Publication Publication Date Title
CN101867060B (en) Lithium-ion energy storage battery
EP4148835A1 (en) Current collector, pole piece and battery
WO2021228193A1 (en) High-energy-density long-life fast charging lithium ion battery and preparation method therefor
CN112467308B (en) Diaphragm, preparation method thereof and lithium ion battery
CN101281987A (en) Ferrous phosphate lithium-based polyalcohol lithium battery and method for manufacturing the same
CN104810524A (en) Lithium ion battery
CN103904290A (en) Aqueous lithium ion battery composite electrode, preparation method of composite electrode and aqueous lithium ion battery
CN111370752A (en) Fast charging and safe low temperature lithium ion battery and method of manufacturing the same
CN101944635A (en) High-power lithium-ion secondary battery and manufacturing method thereof
CN111799470B (en) Positive pole piece and sodium ion battery
CN103606705A (en) Lithium ion battery and preparation method thereof
CN112290080A (en) Lithium ion battery capable of being charged at low temperature
CN113300051A (en) Method for compounding pole piece and diaphragm of lithium ion battery and lithium ion battery
CN112072109A (en) Lithium ion battery and preparation method thereof
CN111710900A (en) Graphene-based lithium iron phosphate anode-silica composite cathode low-temperature high-magnification high-energy-density lithium ion battery
CN111162322A (en) Preparation method of low-temperature lithium ion battery
CN113131096A (en) Method for compounding pole piece and diaphragm of lithium ion battery and lithium ion battery
CN111276733A (en) Safe low-temperature lithium ion battery capable of being charged and discharged quickly and preparation method thereof
CN115699355A (en) Secondary battery, method for manufacturing the same, battery module, battery pack, and device containing the same
CN105761944A (en) Composite positive plate for hybrid super capacitor and preparation method thereof, and hybrid super capacitor
CN210379259U (en) Positive plate for improving rate capability of lithium ion battery
CN107785537A (en) A kind of method of modifying of new type lithium ion battery anode pole piece, its purposes and pole piece
CN111342052A (en) Lithium ion battery with low manufacturing cost and long cycle life and manufacturing method thereof
CN116454283A (en) Potassium ion battery positive electrode additive and preparation method and application thereof
CN110611102A (en) Current collector, pole piece, preparation method of pole piece and electrochemical energy storage device

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
WW01 Invention patent application withdrawn after publication
WW01 Invention patent application withdrawn after publication

Application publication date: 20200626