CN115579530A - Method for preparing aqueous sodium ion battery by dry method - Google Patents

Method for preparing aqueous sodium ion battery by dry method Download PDF

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Publication number
CN115579530A
CN115579530A CN202211125058.XA CN202211125058A CN115579530A CN 115579530 A CN115579530 A CN 115579530A CN 202211125058 A CN202211125058 A CN 202211125058A CN 115579530 A CN115579530 A CN 115579530A
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dry
electrode
ion battery
sodium ion
aqueous sodium
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张增先
程青松
程起林
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Shanghai Huaqi Ruizhi New Energy Technology Co ltd
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Shanghai Huaqi Ruizhi New Energy 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
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/36—Accumulators not provided for in groups H01M10/05-H01M10/34
    • H01M10/38—Construction or manufacture
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F1/00—General methods for the manufacture of artificial filaments or the like
    • D01F1/02—Addition of substances to the spinning solution or to the melt
    • D01F1/10—Other agents for modifying properties
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
    • D01F6/44—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds
    • D01F6/48—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds of polymers of halogenated hydrocarbons
    • 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
    • H01M4/04—Processes of manufacture in general
    • H01M4/0402—Methods of deposition of the material
    • H01M4/0404—Methods of deposition of the material by coating on electrode collectors
    • 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
    • H01M4/04—Processes of manufacture in general
    • H01M4/043—Processes of manufacture in general involving compressing or compaction
    • H01M4/0433—Molding
    • 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
    • H01M4/04—Processes of manufacture in general
    • H01M4/043—Processes of manufacture in general involving compressing or compaction
    • H01M4/0435—Rolling or calendering
    • 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
    • H01M2004/022—Electrodes made of one single microscopic fiber
    • 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

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  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
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  • Battery Electrode And Active Subsutance (AREA)

Abstract

The invention relates to a method for preparing a water-based sodium-ion battery by a dry method, which comprises the following steps: step 1, premixing an active material and a conductive agent through mixing equipment; step 2, adding the powder and the binder mixed in the step 1 into a fiberization device, and shearing and stirring at a high speed to obtain a highly fiberized electrode material; and 3, transferring the highly fibrous electrode material obtained in the step 2 to continuous rolling equipment, and performing continuous rolling forming to obtain the electrode membrane with uniform thickness. And 5, attaching the dry electrode film obtained in the step 4 to a current collector to form a finished dry electrode. And 6, fitting the finished dry electrode obtained in the step 5 with a tab, and performing spot welding to form the finished dry electrode pole piece. And 7, sequentially placing the finished dry-process electrode plates obtained in the step 6 into a packaging material of a pre-punched shell, and then performing liquid injection, heat sealing and standing to obtain the dry-process prepared water-based sodium ion soft package battery. According to the method for preparing the water system sodium ion soft package battery by the dry method, the volume density and the load capacity of the electrode plate are improved by the aid of the fibrous structure generated between the electrode material and the conductive agent by the aid of the binder, compared with a traditional wet method electrode, the water system sodium ion soft package battery prepared by the dry method is remarkably improved in energy density, the rate performance and the cycle stability show certain advantages, and the water system sodium ion soft package battery has wide application prospects in the field of energy storage.

Description

Method for preparing aqueous sodium ion battery by dry method
Technical Field
The invention belongs to the field of battery materials, and relates to a method for preparing a water system sodium ion battery by a dry method.
Background
With the rapid development of emerging technologies such as electric vehicles, power storage systems, and industrial automation systems, the demand of the modern society for electrochemical energy storage devices with high energy density, power density, and long cycle life is increasing. Lithium ion batteries have been widely used in electronic products, transportation vehicles, aerospace, and energy storage devices due to their advantages of high energy density, high output power, low self-discharge, high operating voltage, and the like. However, the problems of insufficient lithium resource, uneven distribution, high cost and the like limit the lithium element in the technical field of large-scale energy storage, so that the development of a novel energy storage system with low price and rich resources is particularly important.
Compared with a lithium ion battery, the sodium ion battery has no over-discharge characteristic, has a similar embedding and releasing mechanism with the lithium ion battery, is low in sodium price and rich in resources, and therefore, the sodium ion battery becomes a novel chemical energy source which most possibly replaces the lithium ion battery. Sodium ion batteries are mainly classified into aqueous sodium ion batteries and organic sodium ion batteries. The electrolyte of the water system sodium ion battery does not contain organic solvents, so that the water system sodium ion battery is high in safety, free of pollution and low in cost, and therefore becomes a research hotspot of a large-scale energy storage system.
The electrode is the most critical part of the battery, and the main manufacturing process of the sodium ion battery electrode (comprising a positive electrode and a negative electrode) is similar to that of the lithium ion battery electrode and is a wet manufacturing process. Especially in the compounding process, a large amount of organic solvents, which are expensive and toxic, must be used, and a recovery device must be established to collect and reprocess the organic solvents. Furthermore, the wet coating and subsequent drying process requires a significant amount of energy consumption, significantly increasing the cost of mass production of the electrodes. Furthermore, during solvent evaporation, the active material tends to precipitate, resulting in delamination of the electrode, impairing the construction of a conductive network in the electrode and reducing the strength of the bond between the active material and the current collector, thus impairing the performance of the final battery.
The dry electrode preparation technology is an electrode preparation technology which mixes an electrode active material, a conductive agent and a binder to obtain electrode powder, and then obtains an electrode plate by continuous roll forming and compounding with a current collector. In the dry method electrode preparation process, no solvent is required to be added and the subsequent drying process is not required, so that the cost is greatly reduced. In addition, because slurry does not exist in the dry mixing process, the electrode is not delaminated due to solvent evaporation. The research and industrialization world of the sodium ion battery in China is leading, and the competitive advantage of the dry process technology in the energy storage field is certainly enhanced by applying the dry process technology to the preparation of the water system sodium ion battery.
Disclosure of Invention
The problem to be solved by the embodiments of the present invention is to provide a method for dry-process preparation of an aqueous sodium-ion battery, so as to solve the problems mentioned in the background art.
The present invention is directed to solving the above problems in the prior art, and provides a method for dry-process preparation of an aqueous sodium ion battery, comprising:
step 1: premixing the active material and the conductive agent by mixing equipment, wherein the stirring time is 20-50 min, and the stirring speed is 300-1000 r/min, so as to obtain mixed powder; the conductive agent is 11-22 wt% of the conductive agent, and the active substance is 78-89 wt%, wherein the active substance is a positive electrode material or a negative electrode material of the water system sodium ion battery;
and 2, step: adding the uniformly mixed powder in the step (1) and a Polytetrafluoroethylene (PTFE) binder into a fiberizing device, and shearing and stirring to obtain a highly fiberized electrode material, wherein the shearing and stirring time is 10-30min, the shearing and stirring temperature is 25-80 ℃, and the shearing and stirring speed is 5000-15000 r/min; wherein, the powder and the PTFE adhesive are 5 to 10 percent of PTFE and 90 to 95 percent of powder according to weight percentage.
And step 3: and (4) transferring the highly-fiberized powder obtained in the step (3) to a continuous rolling device for performing pre-forming treatment to obtain a self-supporting semi-finished dry electrode film.
And 4, step 4: and (4) carrying out rolling treatment on the semi-finished product dry electrode film obtained in the step (4) to enable the semi-finished product dry electrode film to form a finished product dry electrode film.
And 5: and (4) attaching the finished dry electrode film obtained in the step (4) with a current collector to form a finished dry electrode.
And 6: and (5) attaching the finished dry electrode obtained in the step (5) with the tab, and performing spot welding to form the finished dry electrode pole piece.
And 7: and (3) placing the finished product dry-method electrode plate obtained in the step (6) into a packaging material of a pre-punched shell according to the sequence of 'finished product dry-method positive plate-diaphragm-finished product dry-method negative plate', and then carrying out liquid injection, heat sealing, air exhaust and standing to obtain the dry-method prepared water system sodium ion soft package battery.
2. The dry-process production method for an aqueous sodium-ion battery according to claim 1, wherein the positive electrode active material is Na 0.44 MnO 2 Sodium vanadium phosphate, sodium vanadium titanium phosphate, sodium vanadium fluorophosphate, na 2 CoFe(CN) 6 、Na 2 CuFe(CN) 6 A mixture of one or more of them.
3. The dry method for producing an aqueous sodium ion battery according to claim 1, wherein the negative electrode active material is one or a mixture of more of sodium titanium phosphate, sodium manganese titanium phosphate, sodium vanadium phosphate, polyimide, polypyrrole, hard carbon, and soft carbon.
4. The dry-process method for preparing an aqueous sodium ion battery according to claim 1, wherein the PTFE binder is a powder having a particle size of 5 μm to 30 μm and a molecular weight of more than 300 ten thousand. Still further, the PTFE binder has a molecular weight between 400 and 550 million.
5. The dry-process method for preparing the water-based sodium ion battery according to claim 1, wherein the conductive agent is one or a mixture of more of conductive carbon black, ketjen black, conductive graphite, carbon fiber, carbon nanotube, graphene and superconducting carbon black.
6. The dry process for preparing an aqueous sodium ion battery according to claim 1, wherein the fiberizing apparatus is one or more of a single screw extruder, a twin screw extruder, and a supersonic jet mill.
7. The dry-process method for preparing the aqueous sodium-ion battery according to claim 1, wherein the pressure of the continuous rolling pretreatment is 5-40T, the heating temperature is 45-300 ℃, and the thickness of the obtained electrode plate is 500-3000 μm.
8. The dry-process production method for an aqueous sodium-ion battery according to claim 1, wherein the calendering pressure is 1 to 50T.
9. The dry-process method for preparing an aqueous sodium ion battery according to claim 1, wherein the heat treatment temperature is 40 to 100 ℃ and the heat treatment time is 10 to 120min.
10. The dry-process method for preparing a water-based sodium ion battery according to claim 1, wherein the current collector is one or more of a plain aluminum foil, a graphene-coated aluminum foil, a carbon-coated aluminum foil and a microporous aluminum foil.
11. The dry-process production method of an aqueous sodium ion battery according to claim 1, wherein the tab is one or more of an aluminum tab, a nickel tab, and a copper tab.
12. The dry-process production method for an aqueous sodium-ion battery according to claim 1, wherein the spot welding power is 20 to 3000W.
13. The method for dry-process production of an aqueous sodium ion battery according to claim 1, wherein the separator is one or more of a non-woven fabric, a liquid-absorbent paper, a Whatman glass fiber separator, a Celgard 2400PP separator, a slow qualitative filter paper, and a fast qualitative filter paper.
Drawings
Fig. 1 is a schematic diagram of a dry-process-prepared aqueous sodium-ion battery pole piece in example 2.
Fig. 2 is a diagram of a rolling device for preparing a water-based sodium-ion battery pole piece by a dry method in example 2.
Fig. 3 is a real image of the aqueous sodium ion soft package battery prepared by the dry method in example 3.
Fig. 4 is a rate chart of the aqueous sodium ion battery prepared by the dry method in example 3.
Detailed Description
The present invention will be further described with reference to the following embodiments. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.
Example 1
Dry preparation method of anode material of water-based sodium-ion battery
Weighing 900g of sodium vanadium phosphate and 150g of superconducting carbon black, premixing by using mixing equipment, and stirring for 30min at the stirring speed of 500r/min to obtain mixed powder. 55g of PTFE bonding agent with the molecular weight of 400 ten thousand is weighed, and is added into a supersonic speed airflow mill together with the premixed powder for fiberization mixing, the shearing and stirring time is 20min, the shearing and stirring temperature is 70 ℃, and the shearing and stirring speed is 6000r/min. And transferring the obtained fibrous electrode material to a continuous rolling device for performing pre-forming treatment at the pressure of 50T and the heating temperature of 60 ℃ to obtain a semi-finished dry electrode film with the thickness of 5000 mu m and self-supporting property. And (3) carrying out extension heat treatment on the dry electrode film at 100 ℃ for 30min under the pressure of 100T to obtain a finished product of the dry electrode film of the water system sodium ion battery with the thickness of 2000 mu m. And cutting the finished dry electrode film into electrode pieces of 10cm × 0.2cm, attaching the electrode pieces to the carbon-coated aluminum foil and the aluminum electrode lugs, and spot-welding the electrode lugs on a current collector at the power of 2000W to obtain the water-system sodium-ion battery positive electrode piece.
Example 2
Dry preparation method of cathode material of aqueous sodium ion battery
900g of sodium titanium phosphate and 100g of superconducting carbon black are weighed, premixed by mixing equipment, stirred for 30min at the stirring speed of 500r/min, and mixed powder is obtained. Weighing 50g of PTFE binder with the molecular weight of 400 ten thousand, adding the PTFE binder and the premixed powder into a supersonic airflow pulverizer, and performing fiberization mixing, wherein the shearing and stirring time is 15min, the shearing and stirring temperature is 80 ℃, and the shearing and stirring speed is 8000r/min. And transferring the obtained fiberized electrode material to a continuous rolling device for preforming treatment, wherein the pressure is 60T, the heating temperature is 60 ℃, and a semi-finished dry electrode film with the thickness of 5000 mu m and self-supporting property is obtained. And (3) carrying out extension heat treatment on the dry electrode film at the pressure of 100T and the temperature of 80 ℃ for 30min to obtain a finished product of the dry electrode film of the water system sodium ion battery with the thickness of 2000 mu m. And cutting the finished dry electrode film into electrode pieces of 10cm x 0.2cm, attaching the electrode pieces to the carbon-coated aluminum foil and aluminum electrode lugs, and spot-welding the electrode lugs on a current collector at the power of 2000W to obtain the water-based sodium ion battery positive plate.
Example 3
Assembly of water system sodium ion soft package battery
And assembling the prepared water system sodium ion battery positive plate, the prepared water system sodium ion battery negative plate, the prepared non-woven fabric diaphragm and the prepared aluminum-plastic film of the pre-punched shell according to the sequence of aluminum-plastic film-positive plate-non-woven fabric diaphragm-negative plate-aluminum-plastic film, and pre-sealing the soft package battery by using a heat sealing machine. A pipette was used to inject 10mL of 1M Na into the pre-sealed pouch cells 2 SO 4 And finally, packaging the electrolyte by using a heat sealing machine again. Standing for 24h to form the water system sodium ion soft package battery prepared by the dry method.
And performing electrochemical test on the assembled dry-method water system sodium ion soft package battery in a Xinwei CT-4800T instrument, wherein the voltage intervals of the multiplying power performance test and the long cycle stability test are both 0.2-1.6V. The results are shown in fig. 3, the dry-prepared aqueous sodium ion pouch cell has a 75mAh/g charge capacity at a rate of 0.01C, and still maintains a 30.4mAh/g capacity at a high rate of 0.08C. Under the high rate of 0.08C, the capacity retention rate of the water system sodium ion soft package battery prepared by the dry method is 95% after the water system sodium ion soft package battery circulates for 100 circles, the energy density reaches 56Wh/kg, and the water system sodium ion soft package battery prepared by the dry method is obviously superior to the water system sodium ion soft package battery prepared by the same active substance, and the water system sodium ion soft package battery prepared by the dry method has wide application prospect in the field of large-scale energy storage.

Claims (13)

1. A method for preparing an aqueous sodium-ion battery by a dry method is characterized by comprising the following steps:
step 1: premixing the active material and the conductive agent by mixing equipment, wherein the stirring time is 20-50 min, and the stirring speed is 300-1000 r/min, so as to obtain mixed powder; the conductive agent is 11-22 wt% of the conductive agent, and the active substance is 78-89 wt%, wherein the active substance is a positive electrode material or a negative electrode material of the water system sodium ion battery;
step 2: adding the uniformly mixed powder in the step (1) and a Polytetrafluoroethylene (PTFE) binder into a fiberizing device, and shearing and stirring to obtain a highly fiberized electrode material, wherein the shearing and stirring time is 10-30min, the shearing and stirring temperature is 25-80 ℃, and the shearing and stirring speed is 5000-15000 r/min; wherein, the weight percentage of the powder and the PTFE adhesive is 5 percent to 10 percent of PTFE and 90 percent to 95 percent of the powder.
And 3, step 3: and (4) transferring the highly-fiberized powder obtained in the step (3) to a continuous rolling device for performing pre-forming treatment to obtain a self-supporting semi-finished dry electrode film.
And 4, step 4: and (4) carrying out rolling treatment on the semi-finished product dry electrode film obtained in the step (4) to enable the semi-finished product dry electrode film to form a finished product dry electrode film.
And 5: and (4) attaching the finished dry electrode film obtained in the step (4) with a current collector to form a finished dry electrode.
And 6: and (5) attaching the finished dry electrode obtained in the step (5) with a tab, and performing spot welding to form the finished dry electrode pole piece.
And 7: and (3) placing the finished product dry-method electrode plate obtained in the step (6) into a packaging material of a pre-punched shell according to the sequence of 'finished product dry-method positive plate-diaphragm-finished product dry-method negative plate', and then carrying out liquid injection, heat sealing, air exhaust and standing to obtain the dry-method prepared water system sodium ion soft package battery.
2. As claimed in claimThe method for preparing the water-based sodium ion battery by the dry method is characterized in that the positive active material is Na 0.44 MnO 2 Sodium vanadium phosphate, sodium vanadium titanium phosphate, sodium vanadium fluorophosphate, na 2 CoFe(CN) 6 、Na 2 CuFe(CN) 6 A mixture of one or more of them.
3. The dry-process method for preparing a water-based sodium ion battery according to claim 1, wherein the negative active material is one or a mixture of titanium sodium phosphate, titanium manganese sodium phosphate, vanadium sodium phosphate, polyimide, polypyrrole, hard carbon and soft carbon.
4. The dry method for producing an aqueous sodium ion battery according to claim 1, wherein the PTFE binder is a powder having a particle size of 5 μm to 30 μm and a molecular weight of more than 300 ten thousand. Still further, the PTFE binder has a molecular weight between 400 and 550 ten thousand.
5. The dry-process preparation method of the water-based sodium ion battery according to claim 1, wherein the conductive agent is one or a mixture of more of conductive carbon black, ketjen black, conductive graphite, carbon fiber, carbon nanotube, graphene and superconducting carbon black.
6. The dry process for manufacturing aqueous sodium ion batteries according to claim 1, wherein the fiberizing equipment is one or more of a single screw extruder, a twin screw extruder, a supersonic jet mill.
7. The dry-process method for preparing the aqueous sodium-ion battery according to claim 1, wherein the pressure of the continuous rolling pretreatment is 5-40T, the heating temperature is 45-300 ℃, and the thickness of the obtained electrode plate is 500-3000 μm.
8. The dry-process for producing an aqueous sodium-ion battery according to claim 1, wherein the calendering process is carried out at a pressure of 1 to 50T.
9. The dry-process method for preparing an aqueous sodium ion battery according to claim 1, wherein the heat treatment temperature is 40 to 100 ℃ and the heat treatment time is 10 to 120min.
10. The dry-process method for preparing a water-based sodium ion battery according to claim 1, wherein the current collector is one or more of a plain aluminum foil, a graphene-coated aluminum foil, a carbon-coated aluminum foil and a microporous aluminum foil.
11. The dry-process production method for an aqueous sodium ion battery according to claim 1, wherein the tab is one or more of an aluminum tab, a nickel tab, and a copper tab.
12. The dry-process production method for an aqueous sodium-ion battery according to claim 1, wherein the spot welding power is 20 to 3000W.
13. The method for dry-process production of an aqueous sodium ion battery according to claim 1, wherein the separator is one or more of a non-woven fabric, a liquid-absorbent paper, a Whatman glass fiber separator, a Celgard 2400PP separator, a slow qualitative filter paper, and a fast qualitative filter paper.
CN202211125058.XA 2022-09-15 2022-09-15 Method for preparing aqueous sodium ion battery by dry method Pending CN115579530A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115986122A (en) * 2023-01-19 2023-04-18 蚌埠学院 Electrode plate of water-based sodium-ion battery, battery and preparation method of electrode plate and battery
CN116487519A (en) * 2023-06-26 2023-07-25 江苏正力新能电池技术有限公司 Dry electrode, preparation method thereof and battery
CN117219888A (en) * 2023-10-07 2023-12-12 蚌埠学院 Novel dry thick film electrode plate-based aqueous sodium ion secondary battery and preparation method thereof

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115986122A (en) * 2023-01-19 2023-04-18 蚌埠学院 Electrode plate of water-based sodium-ion battery, battery and preparation method of electrode plate and battery
CN116487519A (en) * 2023-06-26 2023-07-25 江苏正力新能电池技术有限公司 Dry electrode, preparation method thereof and battery
CN117219888A (en) * 2023-10-07 2023-12-12 蚌埠学院 Novel dry thick film electrode plate-based aqueous sodium ion secondary battery and preparation method thereof

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