CN113972358A - Preparation process and device of sodium ion battery positive electrode material - Google Patents

Preparation process and device of sodium ion battery positive electrode material Download PDF

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Publication number
CN113972358A
CN113972358A CN202111239309.2A CN202111239309A CN113972358A CN 113972358 A CN113972358 A CN 113972358A CN 202111239309 A CN202111239309 A CN 202111239309A CN 113972358 A CN113972358 A CN 113972358A
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China
Prior art keywords
drying
sodium
ion battery
diaphragm
positive electrode
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Inventor
姚水宝
顾海波
吕建国
辛成舟
童志远
谭国俊
鱼瑞文
周琦
周勇
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Essos Jiangsu Energy Storage Technology Co ltd
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Essos Jiangsu Energy Storage Technology Co ltd
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Priority to CN202111239309.2A priority Critical patent/CN113972358A/en
Publication of CN113972358A publication Critical patent/CN113972358A/en
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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
    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • H01M4/139—Processes of manufacture
    • 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
    • H01M10/054—Accumulators with insertion or intercalation of metals other than lithium, e.g. with magnesium or aluminium
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/403—Manufacturing processes of separators, membranes or diaphragms
    • 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

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Battery Electrode And Active Subsutance (AREA)

Abstract

The invention relates to the technical field of battery preparation, and particularly discloses a preparation process and a device of a positive electrode material of a sodium-ion battery, wherein the preparation process comprises two steps of preparing a positive electrode active material and preparing a positive plate coil material; the device comprises a machine base, a diaphragm unloading device, a positive coil winding device, a slurry unloading device, a slurry coating mechanism, a drying device and an edge material cutting device; a hot air drying component and a hot pressing roller compaction drying component are arranged in the drying device; compared with the prior art, the electrode plate can be effectively prevented from cracking in the drying and forming process, and the quality of the prepared electrode plate is strictly ensured; meanwhile, the whole device can prevent deposition of active materials in the slurry, the thickness of the electrode slice obtained through preparation is guaranteed to be uniform, the electrode slice material after drying can be effectively prevented from cracking, the quality of the prepared sodium ion positive plate is effectively guaranteed, and the device is novel in structural design and excellent in use effect.

Description

Preparation process and device of sodium ion battery positive electrode material
Technical Field
The invention relates to the technical field of battery preparation, and particularly discloses a preparation process and a device of a sodium-ion battery anode material.
Background
A secondary battery is also called a rechargeable battery, and is a battery that can be repeatedly charged and discharged and used for many times. The current major secondary battery technologies are lead-acid batteries, nickel-chromium batteries, nickel-hydrogen batteries and lithium ion batteries. The lithium ion battery has wide application in the field of energy storage due to the advantages of high energy density, long service life and the like, however, the natural abundance of lithium is low and uneven distribution, the current global lithium resource basic reserve (lithium carbonate) is about 58M tons, the exploitable reserve is about 25M tons, the annual consumption of lithium carbonate is about 7-8 ten thousand tons, and the estimated exploitable time is not more than 50 years, so that the cost of the lithium ion battery is continuously increased.
Sodium is a metal with physical and chemical properties closest to those of lithium in all aspects, and the storage abundance of sodium in the earth crust is thousands of times of that of lithium, so that the sodium-ion battery is expected to become a new generation of high-performance and low-cost energy storage technology. The working principle of the sodium ion battery is similar to that of the lithium ion battery, and the storage and release of energy are realized through the redox reaction of sodium ions on the positive electrode and the negative electrode. The core component of the sodium ion battery comprises a positive electrode, a negative electrode and an electrolyte. During charging, sodium ions are removed from the positive active material and are embedded into the negative active material; during discharge, sodium ions are extracted from the negative electrode active material and inserted into the positive electrode active material.
The positive electrode material of the sodium ion battery is similar to that of the lithium battery in the process of preparing the electrode plate, the active material is firstly prepared, then the active material is mixed with an adhesive to prepare slurry, the slurry is coated on a diaphragm to be dried, and the dried positive electrode plate of the sodium ion battery can be obtained by winding and slicing. Therefore, aiming at the problems of the prior positive electrode material of the sodium-ion battery and the related preparation device in the preparation process, the application provides a preparation process and a device of the positive electrode material of the sodium-ion battery, which can effectively solve the technical problems.
Disclosure of Invention
The invention aims to design a preparation process and a device of a positive electrode material of a sodium-ion battery, which can effectively solve the technical problems in the preparation process of the positive electrode material of the sodium-ion battery and a related preparation device.
The invention is realized by the following technical scheme:
a preparation process of a positive electrode material of a sodium-ion battery comprises the following steps:
1) firstly, assembling a production line of a sodium-ion battery anode material, then putting sodium salt, manganese oxide, titanium oxide and nickel oxide into a stirring tank for mixing, putting the mixture into a ball mill for ball milling for 3-5h by adding absolute ethyl alcohol, and sieving and drying the mixture after ball milling;
2) calcining the dried mixture at high temperature for 8-12h under the protection of inert gas, and then cooling to room temperature to obtain an active material;
3) putting the active material into a mixing tank, adding inorganic carbon, a conductive agent, a binder and a thickening agent, and mixing to obtain slurry;
4) and uniformly coating the slurry on a drawn diaphragm, feeding the diaphragm into a drying device along with the diaphragm to perform hot air pre-drying, performing hot-pressing drying by a hot-pressing roller, removing leftover materials by an edge cutting device, and finally rolling to obtain the adhesive tape.
Preferably, the sodium salt is Na2C3O3、Na2C4O4、Na2C5O5、Na2C6O6One or more of (a).
Preferably, the calcination temperature is 620-.
A device for preparing the sodium-ion battery anode material comprises a machine base, a diaphragm unloading device, an anode coil winding device, a slurry unloading device, a slurry coating and leveling mechanism, a drying device and an edge material cutting device, wherein the diaphragm unloading device and the anode coil winding device are respectively arranged on the left end surface and the right end surface of the machine base, and the slurry unloading device, the slurry coating and leveling mechanism, the drying device and the edge material cutting device are sequentially arranged on the machine base from left to right;
the slurry blanking device comprises an agitating tank, an agitating motor and a feeding barrel, wherein the agitating motor is arranged on the upper surface of the agitating tank, the lower end of an output shaft of the agitating motor, which extends into the agitating tank, is connected with an agitating component, the lower end of the agitating tank is connected with the upper surface of the end part of the feeding barrel, the feeding barrel is arranged perpendicular to the traction direction of a diaphragm, one end surface of the feeding barrel is provided with the feeding motor, the inner end of the output shaft of the feeding motor is provided with a feeding spiral blade, the lower surface of the feeding barrel is provided with a plurality of blanking holes at intervals, and the lower surface of the feeding barrel, which is positioned at the positions of the blanking holes, is provided with a blanking nozzle;
the slurry coating and leveling mechanism comprises a portal plate fixedly arranged on the upper surface of the base, a telescopic device is rotatably connected to the top wall of the portal plate, a coating plate is rotatably connected to the portal plate through a pin shaft, the lower end of the coating plate is abutted against the upper surface of the diaphragm, the lower end of the telescopic device is rotatably connected with the upper surface of the coating plate, and the lower surfaces of the front end and the rear end of the coating plate are both connected with downwardly extending baffle edge slats;
the drying device comprises a drying box arranged on the upper surface of a machine base, an inlet and an outlet for penetrating through a diaphragm are arranged on the left side surface and the right side surface of the drying box, an air heater is arranged on the upper surface of the drying box, the air outlet end of the air heater is connected with a hot air guide pipe extending into the left end of an inner cavity of the drying box, the end part of the hot air guide pipe extending into the drying box is arranged in parallel with the traction direction of the diaphragm, a plurality of hot air strip pipes are connected on the hot air guide pipe in the inner cavity of the drying box at intervals, the hot air strip pipes are arranged perpendicular to the traction direction of the diaphragm, an air outlet is arranged at the lower end of the hot air guide pipe, a row of support rollers are arranged at the right lower end of the inner cavity of the drying box, a hot pressing roller is arranged above the support rollers, a hot pressing motor for driving the hot pressing roller is arranged on the rear side surface of the drying box, a cylindrical cavity is concentrically provided with a cylindrical cavity, and a resistance heating rod is inserted in the cylindrical cavity, the end part of the resistance heating rod extends out of the drying box and is fixedly arranged, a first hot air hole is formed in the front face and the rear face of the drying box at the position of the hot air strip pipe, and a second hot air hole is formed in the upper surface of the drying box right above the hot pressing roller;
the rim charge is tailor device sets up the rotation seat at both ends around the frame upper surface including the symmetry, two it is provided with the foundation roll to rotate between the lower extreme of seat, is located the top of foundation roll is provided with the dwang, both ends all are provided with a circular cutter around the dwang, one of them the lateral surface of rotation seat is provided with tailors the motor, the output shaft of tailorring the motor is connected with the tip of dwang.
As a further arrangement of the scheme, the diaphragm discharging device comprises a first rotating frame welded with the left end face of the machine base, and a discharging roller is arranged on the first rotating frame.
As a further arrangement of the scheme, the positive coil winding device comprises a second rotating frame welded with the right end face of the machine base, a coil roller is arranged on the second rotating frame, and a coil motor used for driving the coil roller is further arranged on the second rotating frame.
As the further setting of above-mentioned scheme, the stirring subassembly includes the (mixing) shaft and sets up the spiral stirring leaf at the (mixing) shaft lower extreme, is located be connected with a plurality of L type connecting rods on the (mixing) shaft of spiral stirring leaf top, be connected with a plurality of stirring rods on the L type connecting rod towards the terminal surface of (mixing) shaft, the lower extreme of (mixing) shaft is connected with a plurality of flitchs of scraping of laminating mutually with the agitator tank bottom wall.
As a further arrangement of the above scheme, the telescopic device is one of a hydraulic telescopic rod and an electric push rod.
As a further arrangement of the above scheme, the number of the hot press rollers arranged in the drying box is not less than two, and each hot press roller is arranged right above one of the support rollers.
As a further arrangement of the scheme, the base is further provided with a control box, and the lower surface of the base is further provided with a plurality of shock absorption support legs.
Has the advantages that:
1) the invention discloses a preparation process of a sodium ion battery anode material, which comprises the steps of preheating by hot air to remove most of moisture in slurry to shape the slurry in the process of preparing an electrode plate, then compacting the coated anode material by a hot press roller in one step, heating and drying by heat transfer of the hot press roller, and completely drying and removing the rest moisture.
2) The preparation device disclosed by the invention continuously stirs the slurry in the tank through the stirring assembly before blanking, and the spiral stirring blade in the stirring assembly can prevent the deposition of active materials in the slurry, so that the slurry finally coated on the diaphragm is uniform in components; in addition, the slurry can be flatly laid on the upper surface of the diaphragm through the arranged blanking nozzle in the blanking process, and the thickness of the prepared electrode plate is ensured to be uniform everywhere through the further coating effect of the coating plate.
3) The drying device disclosed by the invention is different from the traditional hot air drying, the hot air discharged from a hot air strip pipe is used for pre-drying at the front section of drying, then the hot air is compacted by a hot pressing roller, and the heat on the hot pressing roller can be transferred in the compacting process, so that the drying of sizing agent on a rear section diaphragm is accelerated, the drying effect can be ensured, the dried electrode plate material can be effectively prevented from cracking, the quality of the prepared sodium ion positive plate is effectively ensured, the structural design is novel, and the using effect is excellent.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a flow chart of the steps of the manufacturing process of the present invention;
FIG. 2 is a schematic view of a first angular perspective structure of the present invention;
FIG. 3 is a schematic view of a second angular perspective structure according to the present invention;
FIG. 4 is a schematic perspective view of a slurry feeding device according to the present invention;
FIG. 5 is a schematic perspective view of a stirring motor and a stirring assembly according to the present invention;
FIG. 6 is a schematic view of the internal plan structure of the feed cartridge of the present invention;
FIG. 7 is a schematic perspective view of a slurry leveling mechanism according to the present invention;
FIG. 8 is a schematic perspective view of the drying apparatus of the present invention;
FIG. 9 is a schematic view of the inner plan structure of the drying box of the present invention;
FIG. 10 is a schematic perspective view of an air heater, a hot air duct, and a hot air strip pipe according to the present invention;
fig. 11 is a schematic perspective view of the rim charge cutting device according to the present invention.
Wherein:
1-a machine base, 101-a control box and 102-a shock absorption supporting leg;
2-diaphragm unloading device, 201-first rotating frame, 202-unloading roller;
3-a positive pole coil winding device, 301-a second rotating frame, 302-a coil roller and 303-a coil motor;
4-slurry blanking device, 401-stirring tank, 402-stirring motor, 403-feeding barrel, 4031-blanking hole, 404-stirring component, 4041-stirring shaft, 4042-spiral turning blade, 4043-L type connecting rod, 4044-stirring rod, 4045-scraping plate, 405-feeding motor, 406-feeding spiral blade and 407-blanking nozzle;
5-slurry coating mechanism, 501-gantry plate, 502-telescoping device, 503-coating plate and 504-edge baffle plate;
6-drying device, 601-drying box, 6011-first hot air hole, 6012-second hot air hole, 602-hot air blower, 603-hot air guide pipe, 604-hot air strip pipe, 605-support roller, 606-hot pressing roller, 607-hot pressing motor, 608-resistance heating rod;
7-offcut cutting device, 701-rotating seat, 702-bottom roller, 703-rotating rod, 704-circular cutter and 705-cutting motor.
Detailed Description
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the present application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", etc. indicate orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These terms are used primarily to better describe the invention and its embodiments and are not intended to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.
Moreover, the terms "mounted," "disposed," "provided," "connected," and "sleeved" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meanings of the above terms in the present invention can be understood by those of ordinary skill in the art according to specific situations.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail with reference to the accompanying drawings 1 to 11, in conjunction with the embodiments.
Example 1
Embodiment 1 discloses a preparation process of a positive electrode material of a sodium-ion battery, which comprises the following steps with reference to fig. 1:
the method comprises the following steps: firstly, assembling a production line of a sodium-ion battery anode material, then putting sodium salt, manganese oxide, titanium oxide and nickel oxide into a stirring tank for mixing, putting the mixture into a ball mill for ball milling for 3 hours by adding absolute ethyl alcohol, and sieving and drying the mixture after ball milling; wherein the sodium salt is Na2C3O3And the temperature during the drying is controlled at 70 ℃.
Step two: calcining the dried mixture at high temperature for 8 hours under the protection of inert gas, and then cooling to room temperature to obtain an active material; wherein the inert gas can be argon, and the temperature of the high-temperature calcination is controlled within the range of 620 ℃.
Step three: putting the obtained active material into a mixing tank, adding inorganic carbon, a conductive agent, a binder and a thickening agent, and mixing to obtain slurry;
step four: and uniformly coating the slurry on a drawn diaphragm, feeding the diaphragm into a drying device along with the diaphragm to perform hot air pre-drying, performing hot-pressing drying by a hot-pressing roller, removing leftover materials by an edge cutting device, and finally rolling to obtain the adhesive tape.
Example 2
Embodiment 2 discloses a preparation process of a positive electrode material of a sodium-ion battery, which comprises the following steps with reference to fig. 1:
the method comprises the following steps: firstly, assembling a production line of a sodium-ion battery anode material, then putting sodium salt, manganese oxide, titanium oxide and nickel oxide into a stirring tank for mixing, putting the mixture into a ball mill for ball milling for 4 hours by adding absolute ethyl alcohol, and sieving and drying the mixture after ball milling; wherein the sodium salt is Na2C4O4And the temperature during the drying is controlled to be 80 ℃.
Step two: calcining the dried mixture at high temperature for 10 hours under the protection of inert gas, and then cooling to room temperature to obtain an active material; wherein the inert gas can be argon, and the temperature of the high-temperature calcination is controlled within the range of 680 ℃.
Example 3
Embodiment 3 discloses a preparation process of a positive electrode material of a sodium-ion battery, which comprises the following steps with reference to fig. 1:
the method comprises the following steps: firstly, assembling a production line of a sodium-ion battery anode material, then putting sodium salt, manganese oxide, titanium oxide and nickel oxide into a stirring tank for mixing, putting the mixture into a ball mill for ball milling for 5 hours by adding absolute ethyl alcohol, and sieving and drying the mixture after ball milling; wherein the sodium salt is Na2C5O5And the temperature during drying is controlled to be 85 ℃.
Step two: calcining the dried mixture at high temperature for 12h under the protection of inert gas, and then cooling to room temperature to obtain an active material; wherein the inert gas can be argon, and the temperature of the high-temperature calcination is controlled within the range of 740 ℃.
Example 4
Example 4 discloses an apparatus for the positive electrode material of the sodium-ion battery of example 2, which is mainly used in step four of example 1.
Referring to attached drawings 2 and 3, the main body of the device mainly comprises a machine base 1, a diaphragm unloading device 2, a positive electrode roll material winding device 3, a slurry blanking device 4, a slurry coating and leveling mechanism 5, a drying device 6 and an edge material cutting device 7. Wherein, a control box 101 is further arranged on the machine base 1, and a plurality of shock absorption support legs 102 are further arranged on the lower surface of the machine base 1. Then the diaphragm unloading device 2 and the anode coil winding device 3 are respectively arranged on the left end surface and the right end surface of the machine base 1, and the slurry unloading device 4, the slurry coating mechanism 5, the drying device 6 and the rim charge cutting device 7 are sequentially arranged on the machine base 1 from left to right.
The diaphragm unloading device 2 comprises a first rotating frame 201 welded with the left end face of the base 1, and an unloading roller 202 is arranged on the first rotating frame 201. The positive coil winding device 3 comprises a second rotating frame 301 welded with the right end face of the machine base 1, a coil roller 302 is arranged on the second rotating frame 301, and a coil motor 303 for driving the coil roller 302 is further arranged on the second rotating frame 301. The membrane can be pulled horizontally along the upper surface of the frame 1 by the action of the above-mentioned roll.
Referring to fig. 4, 5 and 6, the slurry blanking apparatus 4 includes a stirring tank 401, a stirring motor 402 and a feed cylinder 403. The stirring motor 402 is arranged on the upper surface of the stirring tank 401, and a stirring assembly 404 is connected to the lower end of the output shaft of the stirring motor 402 extending into the stirring tank 401. The stirring assembly 404 includes a stirring shaft 4041 and a turnup paddle 4042 provided at a lower end of the stirring shaft 4041. A plurality of L-shaped connecting rods 4043 are connected to the stirring shaft 4041 above the spiral stirring blade 4042, a plurality of stirring rods 4044 are connected to the end face of the L-shaped connecting rod 4043 facing the stirring shaft 4041, and a plurality of scraping plates 4045 attached to the bottom wall of the stirring tank 401 are connected to the lower end of the stirring shaft 4041. The stirring assembly 404 arranged in the embodiment can not only continuously stir the mixture in the tank body, but also the spiral material turning blade 4042 arranged on the stirring assembly can turn the material at the bottom upwards, so that the mixture in the whole tank body is more uniform, and the active material is prevented from being deposited. In addition, the setting of its scraping plate can prevent that the mixture from bonding on the internal wall of jar.
At the lower end of the stirring tank 401, a feed cylinder 403 is connected to the upper surface of the end portion thereof, and the feed cylinder 403 is disposed perpendicularly to the drawing direction of the diaphragm. A feeding motor 405 is arranged on one end face of the feeding barrel 403, a feeding spiral blade 406 is arranged at the inner end of an output shaft of the feeding motor 405, a plurality of blanking holes 4031 are formed in the lower surface of the feeding barrel 403 at intervals, and a blanking nozzle 407 is arranged on the lower surface of the feeding barrel 403 at the position of the blanking hole 4031. In this embodiment, the feeding speed can be controlled by controlling the rotation speed of the feeding motor 405 during discharging, and then the slurry passes through the discharging hole 4031 and falls from the discharging nozzle 407, and is uniformly spread on the drawn diaphragm.
Referring to fig. 7, the slurry coating mechanism 5 includes a gantry plate 501 fixedly disposed on the upper surface of the base 1, and a telescopic device 502 is rotatably connected to the top wall of the gantry plate 501, wherein the telescopic device 502 is one of a hydraulic telescopic rod and an electric push rod. A coating plate 503 is rotatably connected in the gantry plate 501 through a pin shaft, the lower end of the coating plate 503 is abutted against the upper surface of the diaphragm, the lower end of the telescopic device 502 is rotatably connected with the upper surface of the coating plate 503, and the lower surfaces of the front end and the rear end of the coating plate 503 are both connected with downwardly extending baffle edge strips 504. The slurry coating mechanism 5 in this embodiment can adjust the distance between the lower end of the coating plate 503 and the upper surface of the diaphragm by controlling the telescopic device 502, thereby ensuring that the thickness of the finally prepared positive plate of the sodium-ion battery is adjustable and controllable.
Referring to fig. 8, 9 and 10, the drying apparatus 6 includes a drying box 601 disposed on the upper surface of the machine base 1, and an inlet and an outlet for penetrating through the diaphragm are formed on both left and right sides of the drying box 601. The upper surface of the drying box 601 is provided with a hot air blower 602, the air outlet end of the hot air blower 602 is connected with a hot air duct 603 extending into the left end of the inner cavity of the drying box 601, and the end part of the hot air duct 603 extending into the drying box 601 is arranged in parallel with the drawing direction of the diaphragm. Then a plurality of hot air strip pipes 604 are connected to a hot air guide pipe 603 in the inner cavity of the drying box 601 at intervals, wherein the hot air strip pipes 604 are arranged perpendicular to the traction direction of the diaphragm, and the lower ends of the hot air strip pipes 604 are provided with air outlets, so that an air knife mechanism is formed, and hot air can be uniformly discharged from the air outlets and is contacted with the slurry on the diaphragm to realize drying.
In addition, a row of support rollers 605 is further arranged at the right lower end of the inner cavity of the drying box 601, and a hot pressing roller 606 is arranged above the support rollers 605, specifically, when the arrangement is carried out, the number of the hot pressing rollers 606 arranged in the drying box 601 in the embodiment is not less than two, and each hot pressing roller 606 is arranged right above one support roller 605. The rear side surface of the drying box 601 is provided with a hot-pressing motor 607 for driving the hot-pressing roller 606, a cylindrical cavity is concentrically arranged inside the hot-pressing roller 606, a resistance heating rod 608 is inserted into the cylindrical cavity, wherein the inner wall of the cylindrical cavity can be made of a smooth copper material, the resistance heating rod 608 has high heat conduction and low friction effects, and then the end part of the resistance heating rod 608 extends out of the drying box 601 and is fixedly arranged. Meanwhile, in this embodiment, a first hot air hole 6011 is further formed in the front and rear surfaces of the drying box 601 located at the position of the hot air bar pipe 604, and a second hot air hole 6012 is further formed in the upper surface of the drying box 601 located right above the hot pressing roller 606.
Referring to fig. 11, the rim charge cutting device 7 includes rotating seats 701 symmetrically disposed at the front and rear ends of the upper surface of the machine base 1, a bottom roller 702 is disposed between the lower ends of the two rotating seats 701, a rotating rod 703 is disposed above the bottom roller 702, a circular cutter 704 is disposed at each of the front and rear ends of the rotating rod 703, a cutting motor 705 is disposed on the outer side surface of one of the rotating seats 701, and an output shaft of the cutting motor 705 is connected to the end of the rotating rod 703. When the dried electrode sheet is drawn between the bottom roller 702 and the circular cutter 704, the circular cutter 704 can cut off leftover materials, and then the final positive electrode sheet of the sodium-ion battery is wound on the winding roller 302.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A preparation process of a sodium-ion battery anode material adopts a preparation device for preparation, and is characterized by comprising the following steps:
1) mixing the sodium salt, manganese oxide, titanium oxide and nickel oxide in a stirring tank, putting the mixture into a ball mill after mixing, adding absolute ethyl alcohol for ball milling for 3-5h, and sieving and drying the mixture after ball milling;
2) calcining the dried mixture at high temperature for 8-12h under the protection of inert gas, and then cooling to room temperature to obtain an active material;
3) putting the active material into a mixing tank, adding inorganic carbon, a conductive agent, a binder and a thickening agent, and mixing to obtain slurry;
4) and uniformly coating the slurry on a drawn diaphragm, feeding the diaphragm into a drying device along with the diaphragm to perform hot air pre-drying, performing hot-pressing drying by a hot-pressing roller, removing leftover materials by an edge cutting device, and finally rolling to obtain the adhesive tape.
2. The process for preparing the positive electrode material of the sodium-ion battery according to claim 1, wherein the sodium salt is Na2C3O3、Na2C4O4、Na2C5O5、Na2C6O6One or more of (a).
3. The process for preparing the positive electrode material of the sodium-ion battery as claimed in claim 1, wherein the calcination temperature is 620-740 ℃.
4. A device for preparing the positive electrode material of the sodium-ion battery according to any one of claims 1 to 3, wherein the device is used in the steps 3 and 4 and comprises a base (1), a diaphragm unloading device (2), a positive coil winding device (3), a slurry unloading device (4), a slurry leveling mechanism (5), a drying device (6) and a side material cutting device (7), wherein the diaphragm unloading device (2) and the positive coil winding device (3) are respectively arranged on the left end surface and the right end surface of the base (1), and the slurry unloading device (4), the slurry leveling mechanism (5), the drying device (6) and the side material cutting device (7) are sequentially arranged on the base (1) from left to right;
the slurry blanking device (4) comprises a stirring tank (401), a stirring motor (402) and a feeding barrel (403), wherein the stirring motor (402) is arranged on the upper surface of the stirring tank (401), the lower end of an output shaft of the stirring motor (402), which extends into the stirring tank (401), is connected with a stirring assembly (404), the lower end of the stirring tank (401) is connected with the upper surface of the end part of the feeding barrel (403), the feeding barrel (403) is arranged perpendicular to the traction direction of a diaphragm, one end surface of the feeding barrel (403) is provided with the feeding motor (405), the inner end of the output shaft of the feeding motor (405) is provided with a feeding spiral blade (406), the lower surface of the feeding barrel (4031) is provided with a plurality of blanking holes (4031) at intervals, and the lower surface of the feeding barrel (403) positioned at the position of the blanking hole (4031) is provided with a blanking nozzle (407);
the slurry leveling mechanism (5) comprises a portal plate (501) fixedly arranged on the upper surface of the base (1), the top wall of the portal plate (501) is rotatably connected with a telescopic device (502), the portal plate (501) is rotatably connected with a coating plate (503) through a pin shaft, the lower end of the coating plate (503) is abutted against the upper surface of the diaphragm, the lower end of the telescopic device (502) is rotatably connected with the upper surface of the coating plate (503), and the lower surfaces of the front end and the rear end of the coating plate (503) are both connected with downwardly extending baffle edge strips (504);
the drying device (6) comprises a drying box (601) arranged on the upper surface of the base (1), an inlet and an outlet for penetrating through a diaphragm are formed in the left side surface and the right side surface of the drying box (601), an air heater (602) is arranged on the upper surface of the drying box (601), the air outlet end of the air heater (602) is connected with a hot air guide pipe (603) extending into the left end of the inner cavity of the drying box (601), the end part of the hot air guide pipe (603) extending into the drying box (601) is arranged in parallel with the traction direction of the diaphragm, a plurality of hot air strip pipes (604) are connected to the hot air guide pipe (603) positioned in the inner cavity of the drying box (601) at intervals, the hot air strip pipes (604) are arranged perpendicular to the traction direction of the diaphragm, an air outlet is formed in the lower end of the hot air strip pipes, a row of supporting rollers (605) are arranged at the right lower end of the inner cavity of the drying box (601), and a hot pressing roller (606) is arranged above the supporting rollers (605), a hot-pressing motor (607) for driving a hot-pressing roller (606) is arranged on the rear side surface of the drying box (601), a cylindrical cavity is concentrically formed in the hot-pressing roller (606), a resistance heating rod (608) is inserted into the cylindrical cavity, the end part of the resistance heating rod (608) extends out of the drying box (601) and is fixedly arranged, a first hot air hole (6011) is formed in the front and rear surfaces of the drying box (601) at the position of the hot air strip pipe (604), and a second hot air hole (6012) is formed in the upper surface of the drying box (601) right above the hot-pressing roller (606);
device (7) are tailor to rim charge sets up rotation seat (701) at both ends around frame (1) upper surface including the symmetry, two it is provided with bottom roller (702) to rotate between the lower extreme of seat (701), is located the top of bottom roller (702) is provided with dwang (703), both ends all are provided with a circular cutter (704) around dwang (703), one of them the lateral surface that rotates seat (701) is provided with cuts out motor (705), the output shaft of cutting out motor (705) is connected with the tip of dwang (703).
5. The device for preparing the positive electrode material of the sodium-ion battery as claimed in claim 4, wherein the membrane unloading device (2) comprises a first rotating frame (201) welded with the left end face of the machine base (1), and the first rotating frame (201) is provided with an unloading roller (202).
6. The device for preparing the positive electrode material of the sodium-ion battery according to claim 4, wherein the positive electrode coil stock winding device (3) comprises a second rotating frame (301) welded with the right end face of the machine base (1), a coil stock roller (302) is arranged on the second rotating frame (301), and a coil stock motor (303) for driving the coil stock roller (302) is further arranged on the second rotating frame (301).
7. The device for the positive electrode material of the sodium-ion battery as claimed in claim 4, wherein the stirring component (404) comprises a stirring shaft (4041) and spiral turning blades (4042) arranged at the lower end of the stirring shaft (4041), a plurality of L-shaped connecting rods (4043) are connected to the stirring shaft (4041) above the spiral turning blades (4042), a plurality of stirring rods (4044) are connected to the end face, facing the stirring shaft (4041), of the L-shaped connecting rods (4043), and a plurality of scraping plates (4045) attached to the bottom wall of the stirring tank (401) are connected to the lower end of the stirring shaft (4041).
8. The device of the positive electrode material of the sodium-ion battery as claimed in claim 4, wherein the telescopic device (502) is one of a hydraulic telescopic rod or an electric push rod.
9. The device of the sodium-ion battery positive electrode material according to claim 4, characterized in that the drying oven (601) is provided with not less than two hot press rolls (606), and each hot press roll (606) is provided directly above one of the support rolls (605).
10. The device of the positive electrode material of the sodium-ion battery as claimed in claim 4, wherein the base (1) is further provided with a control box (101), and the lower surface of the base (1) is further provided with a plurality of shock absorption support legs (102).
CN202111239309.2A 2021-10-25 2021-10-25 Preparation process and device of sodium ion battery positive electrode material Withdrawn CN113972358A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114275264A (en) * 2022-02-11 2022-04-05 徐州日托新材料科技有限公司 Solar energy component hot pressing packaging hardware with dampproofing function
CN115302569A (en) * 2022-08-02 2022-11-08 江西绣丽织带有限公司 Preparation process of antibacterial elastic restraint strap
CN116914068A (en) * 2023-09-06 2023-10-20 常州纳科诺尔精密轧制设备有限公司 Pole piece hot rolling mechanism and using method thereof

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114275264A (en) * 2022-02-11 2022-04-05 徐州日托新材料科技有限公司 Solar energy component hot pressing packaging hardware with dampproofing function
CN114275264B (en) * 2022-02-11 2023-02-17 徐州日托新材料科技有限公司 Solar energy component hot pressing packaging hardware with dampproofing function
CN115302569A (en) * 2022-08-02 2022-11-08 江西绣丽织带有限公司 Preparation process of antibacterial elastic restraint strap
CN116914068A (en) * 2023-09-06 2023-10-20 常州纳科诺尔精密轧制设备有限公司 Pole piece hot rolling mechanism and using method thereof
CN116914068B (en) * 2023-09-06 2023-11-24 常州纳科诺尔精密轧制设备有限公司 Pole piece hot rolling mechanism and using method thereof

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Application publication date: 20220125