CN113745663B - Film type sodium ion secondary battery and preparation method thereof - Google Patents
Film type sodium ion secondary battery and preparation method thereof Download PDFInfo
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- H01M4/00—Electrodes
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Abstract
The invention discloses a film type sodium ion secondary battery and a preparation method thereof, wherein the film type sodium ion secondary battery comprises a shell, a positive pole piece and a negative pole piece, wherein the positive pole piece and the negative pole piece are connected through pressing, and the positive pole piece and the negative pole piece are both positioned in the shell; a preparation method of a film type sodium ion secondary battery comprises the steps of firstly, selecting raw materials; step two, spraying and sputtering; step three, drying and rolling; step four, stirring; step five, packaging and molding; according to the invention, the positive electrode material and the negative electrode material sprayed with the suspension are dried, so that solid electrolyte is formed on the surfaces of the positive electrode material and the negative electrode material, the mode that the conventional battery adopts liquid electrolyte is changed, and therefore the safety performance of the battery is improved.
Description
Technical Field
The invention relates to the technical field of batteries, in particular to a film type sodium ion secondary battery and a preparation method thereof.
Background
Lithium ion batteries have been widely used in various fields such as energy storage, electric vehicles, electric tools, mobile numerals, and the like. With the wide application of lithium ion batteries, particularly the rapid development of the electric automobile market, lithium resources are consumed in a large amount and are about to be exhausted. The current lithium ion battery technology has the problems of high price, poor material stability, poor long-cycle safety performance and the like in the stage of large-scale energy storage. Meanwhile, in consideration of comprehensive energy consumption of lithium ion battery material manufacture, battery production and circulation, the energy consumption for manufacturing a lithium ion battery of 1kWh is about 400kWh, about 75kg of carbon dioxide gas (corresponding to the amount of gas discharged by 35L of gasoline combustion) is generated, and the main energy consumption is the production of electrode materials. Therefore, the environmental benefit of the lithium ion battery can be gradually developed only after the lithium ion battery is circularly operated for hundreds of times (> 400).
The crust content of the lithium element is only 0.0065%, and more than 76% of the global lithium reserves are intensively distributed in south america. The lithium resource reserves are small, and the global distribution is uneven, so that the cost of the lithium ion battery is always high. The content of the sodium element crust of the same main group is about 2.8%, the abundance is 430 times of that of the lithium resource, and the sodium element crust has similar physical and chemical properties as lithium. According to the principle of a lithium ion rocking chair type battery, the sodium ion-rich compound can be similar to a lithium ion-rich positive electrode material, provides sodium ions and a structure which can be detached and intercalated, and is matched with corresponding electrolyte, a diaphragm and a negative electrode to form the room-temperature sodium ion battery. The development of sodium ion batteries provides an important direction for reducing the cost of secondary ion batteries. The sodium ion battery generates battery voltage through the difference of positive and negative electrode potentials of sodium ion intercalation batteries, realizes intercalation and migration of sodium ions between positive and negative electrodes, and completes charge storage and release.
The thin film battery of the sodium ion battery is not reported at present, so that the design of the thin film type sodium ion secondary battery and the preparation method thereof are necessary.
Disclosure of Invention
The invention aims to provide a film type sodium ion secondary battery and a preparation method thereof, which are used for solving the problems in the background technology.
In order to achieve the above purpose, the present invention provides the following technical solutions: the film type sodium ion secondary battery comprises a shell, a positive electrode plate and a negative electrode plate, wherein the positive electrode plate and the negative electrode plate are connected through pressing, and the positive electrode plate and the negative electrode plate are both positioned in the shell.
A preparation method of a film type sodium ion secondary battery comprises the steps of firstly, selecting raw materials; step two, spraying and sputtering; step three, drying and rolling; step four, stirring; step five, packaging and molding;
firstly, selecting a certain amount of active substances, a conductive agent, a binder, an NMP solvent, a current collector, sodium salt, a mixed solvent, PEO polymer and PVDF for standby, wherein the active substances are sodium vanadium phosphate which is a sodium fast ion conductor material coated by carbon, the conductive agent is one or a mixture of a plurality of superconducting carbon black, carbon nano tubes and acetylene black, the binder is one or a mixture of a plurality of PVDF, PTFE, polyaniline and polyurethane, and the current collector is an aluminum foil current collector or a nickel foil current collector;
respectively weighing 80-95% of active substances, 2-10% of conductive agents and 3-10% of binders in percentage by mass from the standby materials selected in the step one, then weighing a proper amount of NMP solvent in the step one, then placing the weighed active substances, conductive agents and binders in the NMP solvent for dispersion treatment by using a dispersing machine to obtain positive electrode slurry, then coating the obtained positive electrode slurry on the current collector weighed in the step one in a spray sputtering manner, wherein the sputtered thickness is 20-100 microns, then placing the current collector sputtered with the positive electrode slurry in a drying box for drying treatment, and then rolling the dried current collector to obtain the positive electrode material;
in the third step, 80-95% of active substances, 2-10% of conductive agents and 3-10% of binders are respectively weighed according to mass percentage from the standby materials selected in the first step, then an appropriate amount of NMP solvent is weighed in the first step, the weighed active substances, conductive agents and binders are placed in the NMP solvent to be subjected to dispersion treatment by using a dispersion machine to obtain negative electrode slurry, the obtained negative electrode slurry is coated on the current collector weighed in the first step in a spray sputtering mode, the sputtered thickness is 50-150 microns, the current collector sputtered with the negative electrode slurry is placed in a drying box to be subjected to drying treatment, and then the dried current collector is subjected to rolling treatment to obtain the negative electrode material;
in the fourth step, naClO is mixed 4 、NaPF 6 、NaN(SO 2 CF 3 ) 2 、NaSO 3 CF 3 And NaBF 4 Dissolving one or more sodium salts in one or more mixed solvents of solvent DMC, EMC, DEC, PC, adding 50-80% of PEO polymer and PVDF, and stirring to form suspension;
and in the fifth step, the suspension prepared and molded in the fourth step is coated on the positive electrode material and the negative electrode material respectively obtained in the second step and the third step in a spray sputtering mode, then the positive electrode material and the negative electrode material are respectively dried to obtain a positive electrode plate and a negative electrode plate, the dried positive electrode plate and the dried negative electrode plate are pressed together, and finally the thin film battery is manufactured by using a shell for packaging.
Preferably, in the second step, the dispersing time is 20-30min, the rotating speed of the stirring shaft in the dispersing process is 1500r/min, and the solid content in the positive electrode slurry is 30-70%.
Preferably, in the second step, the drying temperature is divided into three sections, the first section is at 30-40 ℃, the drying time is 5-10min, the second section is at 40-60 ℃, the drying time is 20-30min, the third section is at 90-100 ℃, the drying time is 30-60min, the humidity in the drying box is kept at 40-60% in the drying process, after the third section is dried, the humidity in the drying box is stopped, and then the residual moisture on the surface of the current collector is dried by using the residual heat in the drying box.
Preferably, in the third step, the dispersing time is 25-35min, the rotating speed of the stirring shaft in the dispersing process is 1300r/min, and the solid content in the positive electrode slurry is 30-70%.
Preferably, in the third step, the drying temperature is divided into three sections, the first section is at 25-35 ℃, the drying time is 3-5min, the second section is at 35-55 ℃, the drying time is 5-20min, the third section is at 55-80 ℃, the drying time is 20-30min, the humidity in the drying box is kept at 40-60% in the drying process, after the third section is dried, the humidity in the drying box is stopped, and then the residual moisture on the surface of the current collector is dried by using the residual heat in the drying box.
Preferably, in the fifth step, the shell is made of an aluminum plastic film, the thickness of the prepared film battery is 0.1-0.5mm, and the matching ratio of the positive electrode surface to the negative electrode surface in the film battery is 1:2.
Compared with the prior art, the invention has the beneficial effects that: according to the invention, the positive electrode material and the negative electrode material sprayed with the suspension are dried, so that solid electrolytes are formed on the surfaces of the positive electrode material and the negative electrode material, the mode that the conventional battery adopts liquid electrolytes is changed, and the safety performance of the battery is improved.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present invention;
FIG. 2 is a flow chart of the method of the present invention;
FIG. 3 is a charge-discharge diagram of a thin film battery in example 1 of the present invention;
FIG. 4 is a graph showing the cycle performance of the thin film battery in example 1 of the present invention;
in the figure: 1. a housing; 2. a positive electrode sheet; 3. and a negative pole piece.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, an embodiment of the present invention is provided: the utility model provides a film type sodium ion secondary battery, includes casing 1, positive pole piece 2 and negative pole piece 3, and positive pole piece 2 and negative pole piece 3 pass through the pressfitting and connect, and positive pole piece 2 and negative pole piece 3 all are located the inside of casing 1.
Referring to fig. 2-4, an embodiment of the present invention is provided:
example 1:
a preparation method of a film type sodium ion secondary battery comprises the steps of firstly, selecting raw materials; step two, spraying and sputtering; step three, drying and rolling; step four, stirring; step five, packaging and molding;
firstly, selecting a certain amount of active substances, a conductive agent, a binder, an NMP solvent, a current collector, sodium salt, a mixed solvent, PEO polymer and PVDF for standby, wherein the active substances are sodium vanadium phosphate which is a sodium fast ion conductor material coated by carbon, the conductive agent is one or a mixture of a plurality of superconducting carbon black, carbon nano tubes and acetylene black, the binder is one or a mixture of a plurality of PVDF, PTFE, polyaniline and polyurethane, and the current collector is an aluminum foil current collector or a nickel foil current collector;
respectively weighing 80% of active substances, 10% of conductive agents and 10% of binders according to mass percent in the standby materials selected in the step one, then weighing a proper amount of NMP solvent in the step one, then placing the weighed active substances, conductive agents and binders in the NMP solvent for dispersion treatment by using a dispersing machine to obtain positive electrode slurry, wherein the dispersion time is 20min, the rotating speed of a stirring shaft in the dispersion process is 1500r/min, the solid content in the positive electrode slurry is 30%, the obtained positive electrode slurry is coated on the current collector weighed in the step one in a spray sputtering mode, the sputtered thickness is 20 microns, then the current collector sputtered with the positive electrode slurry is placed in a drying box for drying treatment, the drying temperature is three sections, the drying temperature of the first section is 30 ℃, the drying time is 5min, the drying temperature of the second section is 40 ℃, the drying temperature of the third section is 90 ℃, the drying time is 30min, the humidity of the drying box is kept at 40%, the third section is kept at 40%, the residual humidity is kept in the drying box, and then the current collector is dried after the rest in the drying box, and the residual humidity of the current collector is kept after the drying is dried, the current collector is dried, and the residual humidity is dried;
in the third step, 80% of active material, 10% of conductive agent and 10% of binder are respectively weighed according to the mass percentage from the standby materials selected in the first step, then an appropriate amount of NMP solvent is weighed from the first step, the weighed active material, conductive agent and binder are placed in the NMP solvent to be subjected to dispersion treatment by using a dispersing machine to obtain negative electrode slurry, the dispersion time is 25min, the rotating speed of a stirring shaft in the dispersion process is 1300r/min, the solid content in the negative electrode slurry is 30%, the obtained negative electrode slurry is coated on a current collector weighed in the first step in a spraying sputtering manner, the sputtered thickness is 50 microns, then the current collector sputtered with the negative electrode slurry is placed in a drying box to be subjected to drying treatment, the drying temperature is three sections, the drying temperature in the first section is 25 ℃, the drying time is 3min, the drying temperature in the second section is 35 ℃, the drying temperature in the third section is 55 ℃, the drying time is 20min, the humidity in a drying box is kept at 40% in the drying process, the current collector is stopped in the third section, the residual humidity in the drying box is kept, and the current collector is dried after the current collector is dried, and the residual humidity in the drying box is kept, and then the residual humidity in the current collector is dried;
in the fourth step, naClO is mixed 4 、NaPF 6 、NaN(SO 2 CF 3 ) 2 、NaSO 3 CF 3 And NaBF 4 Dissolving one or more sodium salts in one or more mixed solvents of solvent DMC, EMC, DEC, PC, adding 50-80% of PEO polymer and PVDF, and stirring to form suspension;
in the fifth step, the suspension prepared and formed in the fourth step is coated on the positive electrode material and the negative electrode material obtained in the second step and the third step respectively by using a spray sputtering method, then the positive electrode material and the negative electrode material are dried respectively to obtain a positive electrode plate 2 and a negative electrode plate 3, then the dried positive electrode plate 2 and the dried negative electrode plate 3 are pressed together, finally the shell 1 is used for packaging to prepare a film battery, the shell 1 is made of an aluminum plastic film, the thickness of the prepared film battery is 0.1mm, the capacity matching ratio of the positive electrode surface to the negative electrode surface in the film battery is 1:2, the charging and discharging electrography of the film battery is shown in fig. 3, the cycle performance of the film battery is shown in fig. 4, and the positive electrode reaction equation in the film battery is Na 3 V 2 (PO 4 ) 3 －2e － →NaV 2 (PO 4 ) 3 +2Na + The negative electrode reaction equation is Na 3 V 2 (PO 4 ) 3 +Na + +e － →Na 4 V 2 (PO 4 ) 3 。
Example 2:
a preparation method of a film type sodium ion secondary battery comprises the steps of firstly, selecting raw materials; step two, spraying and sputtering; step three, drying and rolling; step four, stirring; step five, packaging and molding;
firstly, selecting a certain amount of active substances, a conductive agent, a binder, an NMP solvent, a current collector, sodium salt, a mixed solvent, PEO polymer and PVDF for standby, wherein the active substances are sodium vanadium phosphate which is a sodium fast ion conductor material coated by carbon, the conductive agent is one or a mixture of a plurality of superconducting carbon black, carbon nano tubes and acetylene black, the binder is one or a mixture of a plurality of PVDF, PTFE, polyaniline and polyurethane, and the current collector is an aluminum foil current collector or a nickel foil current collector;
respectively weighing 95% of active substances, 2% of conductive agents and 3% of binders according to mass percent from standby materials selected in the step one, then weighing a proper amount of NMP solvent from the step one, then placing the weighed active substances, conductive agents and binders in the NMP solvent for dispersion treatment by using a dispersing machine to obtain positive electrode slurry, wherein the dispersion time is 20min, the rotating speed of a stirring shaft in the dispersion process is 1500r/min, the solid content in the positive electrode slurry is 30%, the obtained positive electrode slurry is coated on a current collector weighed in the step one in a spray sputtering mode, the sputtered thickness is 20 microns, then the current collector sputtered with the positive electrode slurry is placed in a drying box for drying treatment, the drying temperature is three sections, the drying temperature of the first section is 30 ℃, the drying time is 5min, the drying temperature of the second section is 40 ℃, the drying temperature of the third section is 90 ℃, the drying time is 30min, the humidity of a drying box is kept at 40%, the third section is kept at 40%, the humidity of the drying box is kept in the drying process, and the residual humidity of the current collector is kept in the drying box after the drying box is finished, and then the residual humidity of the current collector is dried, and the current collector is dried;
in the third step, 95% of active material, 2% of conductive agent and 3% of binder are respectively weighed according to the mass percentage from the standby materials selected in the first step, then an appropriate amount of NMP solvent is weighed from the first step, the weighed active material, conductive agent and binder are placed in the NMP solvent to be subjected to dispersion treatment by using a dispersing machine to obtain negative electrode slurry, the dispersion time is 25min, the rotating speed of a stirring shaft in the dispersion process is 1300r/min, the solid content in the negative electrode slurry is 30%, the obtained negative electrode slurry is coated on a current collector weighed in the first step in a spraying sputtering manner, the sputtered thickness is 50 microns, then the current collector sputtered with the negative electrode slurry is placed in a drying box to be subjected to drying treatment, the drying temperature is three sections, the drying temperature in the first section is 25 ℃, the drying time is 3min, the drying temperature in the second section is 35 ℃, the drying temperature in the third section is 55 ℃, the drying time is 20min, the humidity in a drying box is kept at 40% in the drying process, the current collector is stopped in the third section, the residual humidity in the drying box is kept, and the current collector is dried after the current collector is dried, and the residual humidity in the drying box is kept, and then the residual humidity in the current collector is dried;
in the fourth step, naClO is mixed 4 、NaPF 6 、NaN(SO 2 CF 3 ) 2 、NaSO 3 CF 3 And NaBF 4 Dissolving one or more sodium salts in one or more mixed solvents of solvent DMC, EMC, DEC, PC, adding 50-80% of PEO polymer and PVDF, and stirring to form suspension;
in the fifth step, the suspension prepared and formed in the fourth step is coated on the positive electrode material and the negative electrode material obtained in the second step and the third step respectively by using a spray sputtering method, then the positive electrode material and the negative electrode material are dried respectively to obtain a positive electrode plate 2 and a negative electrode plate 3, then the dried positive electrode plate 2 and the dried negative electrode plate 3 are pressed together, finally the shell 1 is used for packaging to prepare the thin film battery, the shell 1 is made of an aluminum plastic film, the thickness of the prepared thin film battery is 0.3mm, and the capacity matching ratio of the positive electrode plate to the negative electrode plate in the thin film battery is 1:2.
Example 3:
a preparation method of a film type sodium ion secondary battery comprises the steps of firstly, selecting raw materials; step two, spraying and sputtering; step three, drying and rolling; step four, stirring; step five, packaging and molding;
firstly, selecting a certain amount of active substances, a conductive agent, a binder, an NMP solvent, a current collector, sodium salt, a mixed solvent, PEO polymer and PVDF for standby, wherein the active substances are sodium vanadium phosphate which is a sodium fast ion conductor material coated by carbon, the conductive agent is one or a mixture of a plurality of superconducting carbon black, carbon nano tubes and acetylene black, the binder is one or a mixture of a plurality of PVDF, PTFE, polyaniline and polyurethane, and the current collector is an aluminum foil current collector or a nickel foil current collector;
respectively weighing 90% of active substances, 5% of conductive agents and 5% of binders according to mass percent from standby materials selected in the step one, then weighing a proper amount of NMP solvent from the step one, then placing the weighed active substances, conductive agents and binders in the NMP solvent for dispersion treatment by using a dispersing machine to obtain positive electrode slurry, wherein the dispersion time is 20min, the rotating speed of a stirring shaft in the dispersion process is 1500r/min, the solid content in the positive electrode slurry is 30%, the obtained positive electrode slurry is coated on a current collector weighed in the step one in a spray sputtering mode, the sputtered thickness is 20 microns, then the current collector sputtered with the positive electrode slurry is placed in a drying box for drying treatment, the drying temperature is three sections, the drying temperature of the first section is 30 ℃, the drying time is 5min, the drying temperature of the second section is 40 ℃, the drying temperature of the third section is 90 ℃, the drying time is 30min, the humidity of a drying box is kept at 40%, the third section is kept at 40%, the humidity of the drying box is kept in the drying process, and the residual humidity of the current collector is kept in the drying box after the drying box is finished, and then the residual humidity of the current collector is dried, and the current collector is dried;
in the third step, 90% of active material, 5% of conductive agent and 5% of binder are respectively weighed according to the mass percentage from the standby materials selected in the first step, then an appropriate amount of NMP solvent is weighed from the first step, the weighed active material, conductive agent and binder are placed in the NMP solvent to be subjected to dispersion treatment by using a dispersing machine to obtain negative electrode slurry, the dispersion time is 25min, the rotating speed of a stirring shaft in the dispersion process is 1300r/min, the solid content in the negative electrode slurry is 30%, the obtained negative electrode slurry is coated on a current collector weighed in the first step in a spraying sputtering manner, the sputtered thickness is 50 microns, then the current collector sputtered with the negative electrode slurry is placed in a drying box to be subjected to drying treatment, the drying temperature is three sections, the drying temperature in the first section is 25 ℃, the drying time is 3min, the drying temperature in the second section is 35 ℃, the drying temperature in the third section is 55 ℃, the drying time is 20min, the humidity in a drying box is kept at 40%, the humidity in the drying process is kept at 40%, the current collector is stopped in the third section, the residual humidity is kept in the drying box, and then the current collector is dried, and the residual humidity is kept in the drying box after the current collector is dried, and the current collector is dried;
in the fourth step, naClO is mixed 4 、NaPF 6 、NaN(SO 2 CF 3 ) 2 、NaSO 3 CF 3 And NaBF 4 Dissolving one or more sodium salts in one or more mixed solvents of solvent DMC, EMC, DEC, PC, adding 50-80% of PEO polymer and PVDF, and stirring to form suspension;
in the fifth step, the suspension prepared and formed in the fourth step is coated on the positive electrode material and the negative electrode material obtained in the second step and the third step respectively by using a spray sputtering method, then the positive electrode material and the negative electrode material are dried respectively to obtain a positive electrode plate 2 and a negative electrode plate 3, then the dried positive electrode plate 2 and the dried negative electrode plate 3 are pressed together, finally the shell 1 is used for packaging to prepare the thin film battery, the shell 1 is made of an aluminum plastic film, the thickness of the prepared thin film battery is 0.5mm, and the capacity matching ratio of the positive electrode plate to the negative electrode plate in the thin film battery is 1:2.
The thicknesses of the thin film batteries obtained in the above examples were counted, respectively, and the obtained results are shown in the following table
| Thickness of (L) | |
| Example 1 | 0.1mm |
| Example 2 | 0.3mm |
| Example 3 | 0.5mm |
Based on the above, the invention has the beneficial effects that in the process of preparing the thin film battery, the prepared and molded suspension is sprayed and sputtered on the positive electrode material and the negative electrode material, so that the positive electrode material and the negative electrode material are subjected to drying treatment, solid electrolyte remains on the surfaces of the positive electrode material and the negative electrode material, the mode of using liquid electrolyte in the existing battery is changed, the safety of the thin film battery is improved, meanwhile, in the process of preparing, the current collector with the residual positive electrode slurry and the residual negative electrode slurry is subjected to sectional drying treatment, the drying speed of the current collector is reduced sufficiently, and the falling of the positive electrode slurry and the residual negative electrode slurry sprayed and sputtered on the current collector is avoided, so that the yield of the thin film battery is improved.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (6)
1. A preparation method of a film type sodium ion secondary battery comprises the steps of firstly, selecting raw materials; step two, spraying and sputtering; step three, drying and rolling; step four, stirring; step five, packaging and molding; the method is characterized in that:
firstly, selecting a certain amount of active substances, a conductive agent, a binder, an NMP solvent, a current collector, sodium salt, a mixed solvent, PEO polymer and PVDF for standby, wherein the active substances are sodium vanadium phosphate which is a sodium fast ion conductor material coated by carbon, the conductive agent is one or a mixture of a plurality of superconducting carbon black, carbon nano tubes and acetylene black, the binder is one or a mixture of a plurality of PVDF, PTFE, polyaniline and polyurethane, and the current collector is an aluminum foil current collector or a nickel foil current collector;
respectively weighing 80-95% of active substances, 2-10% of conductive agents and 3-10% of binders in percentage by mass from the standby materials selected in the step one, then weighing a proper amount of NMP solvent in the step one, then placing the weighed active substances, conductive agents and binders in the NMP solvent for dispersion treatment by using a dispersing machine to obtain positive electrode slurry, then coating the obtained positive electrode slurry on the current collector weighed in the step one in a spray sputtering manner, wherein the sputtered thickness is 20-100 microns, then placing the current collector sputtered with the positive electrode slurry in a drying box for drying treatment, and then rolling the dried current collector to obtain the positive electrode material; the drying temperature is divided into three sections, the first section is 30-40 ℃, the drying time is 5-10min, the second section is 40-60 ℃, the drying time is 20-30min, the third section is 90-100 ℃, the drying time is 30-60min, the humidity in the drying box is kept at 40-60% in the drying process, after the third section is dried, the humidity in the drying box is stopped, and then the residual moisture on the surface of the current collector is dried by utilizing the residual heat in the drying box;
in the third step, 80-95% of active substances, 2-10% of conductive agents and 3-10% of binders are respectively weighed according to mass percentage from the standby materials selected in the first step, then an appropriate amount of NMP solvent is weighed in the first step, the weighed active substances, conductive agents and binders are placed in the NMP solvent to be subjected to dispersion treatment by using a dispersion machine to obtain negative electrode slurry, the obtained negative electrode slurry is coated on the current collector weighed in the first step in a spray sputtering manner, the sputtered thickness is 50-150 microns, the current collector sputtered with the negative electrode slurry is placed in a drying box to be subjected to drying treatment, and then the dried current collector is subjected to rolling treatment to obtain the negative electrode material;
in the fourth step, naClO is mixed 4 、NaPF 6 、NaN(SO 2 CF 3 ) 2 、NaSO 3 CF 3 And NaBF 4 Dissolving one or more sodium salts in one or more mixed solvents of solvent DMC, EMC, DEC, PC, adding 50-80% of PEO polymer and PVDF, and stirring to form suspension;
in the fifth step, the suspension prepared and molded in the fourth step is coated on the positive electrode material and the negative electrode material respectively obtained in the second step and the third step in a spray sputtering mode, then the positive electrode material and the negative electrode material are respectively dried to obtain a positive electrode plate (2) and a negative electrode plate (3), then the dried positive electrode plate (2) and the dried negative electrode plate (3) are pressed together, and finally the thin film battery is manufactured by packaging the positive electrode plate and the negative electrode plate with a shell (1).
2. The method for manufacturing a thin film type sodium ion secondary battery according to claim 1, wherein: in the second step, the dispersing time is 20-30min, the rotating speed of the stirring shaft in the dispersing process is 1500r/min, and the solid content in the positive electrode slurry is 30-70%.
3. The method for manufacturing a thin film type sodium ion secondary battery according to claim 1, wherein: in the third step, the dispersing time is 25-35min, the rotating speed of the stirring shaft in the dispersing process is 1300r/min, and the solid content in the positive electrode slurry is 30-70%.
4. The method for manufacturing a thin film type sodium ion secondary battery according to claim 1, wherein: in the third step, the drying temperature is divided into three sections, the first section is 25-35 ℃, the drying time is 3-5min, the second section is 35-55 ℃, the drying time is 5-20min, the third section is 55-80 ℃, the drying time is 20-30min, the humidity in the drying box is kept at 40-60% in the drying process, after the third section is dried, the humidity in the drying box is stopped, and then the residual moisture on the surface of the current collector is dried by utilizing the residual heat in the drying box.
5. The method for manufacturing a thin film type sodium ion secondary battery according to claim 1, wherein: in the fifth step, the shell (1) is made of an aluminum plastic film, the thickness of the prepared film battery is 0.1-0.5mm, and the matching ratio of the positive electrode surface to the negative electrode surface in the film battery is 1:2.
6. A sodium ion secondary battery prepared by the preparation method of the film type sodium ion secondary battery according to claim 1, comprising a shell (1), a positive electrode plate (2) and a negative electrode plate (3), and being characterized in that: the positive pole piece (2) and the negative pole piece (3) are connected through pressing, and the positive pole piece (2) and the negative pole piece (3) are both positioned in the shell (1).
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105633468A (en) * | 2015-02-13 | 2016-06-01 | 中国科学院青岛生物能源与过程研究所 | Solid sodium battery electrolyte and preparation and application thereof |
| CN109768322A (en) * | 2018-05-31 | 2019-05-17 | 上海紫剑化工科技有限公司 | Sodium-ion battery polymer electrolyte matrix and film, preparation method and application |
| CN110010843A (en) * | 2019-02-28 | 2019-07-12 | 东营峰谷源新能源科技有限公司 | A kind of production method of takeup type sodium-ion battery |
| CN111040061A (en) * | 2019-12-26 | 2020-04-21 | 中国科学技术大学 | Solid sodium ion electrolyte, preparation method thereof and all-solid-state sodium battery |
| CN111384436A (en) * | 2018-12-28 | 2020-07-07 | 中信国安盟固利动力科技有限公司 | All-solid-state lithium ion battery with negative electrode coated with solid electrolyte slurry and preparation method thereof |
| CN211017288U (en) * | 2019-12-19 | 2020-07-14 | 溧阳中科海钠科技有限责任公司 | Sodium ion battery core |
| CN111952675A (en) * | 2020-08-20 | 2020-11-17 | 陕西科技大学 | High-performance all-solid-state sodium ion battery and preparation method thereof |
| CN112290081A (en) * | 2020-09-22 | 2021-01-29 | 江苏大学 | Manufacturing method of high-energy-density quasi-solid sodium ion battery |
| CN113036074A (en) * | 2019-12-09 | 2021-06-25 | 北京小米移动软件有限公司 | Battery cathode, processing method thereof and battery |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9735445B2 (en) * | 2015-09-14 | 2017-08-15 | Nanotek Instruments, Inc. | Alkali metal or alkali-ion batteries having high volumetric and gravimetric energy densities |
-
2021
- 2021-07-27 CN CN202110852517.3A patent/CN113745663B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105633468A (en) * | 2015-02-13 | 2016-06-01 | 中国科学院青岛生物能源与过程研究所 | Solid sodium battery electrolyte and preparation and application thereof |
| CN109768322A (en) * | 2018-05-31 | 2019-05-17 | 上海紫剑化工科技有限公司 | Sodium-ion battery polymer electrolyte matrix and film, preparation method and application |
| CN111384436A (en) * | 2018-12-28 | 2020-07-07 | 中信国安盟固利动力科技有限公司 | All-solid-state lithium ion battery with negative electrode coated with solid electrolyte slurry and preparation method thereof |
| CN110010843A (en) * | 2019-02-28 | 2019-07-12 | 东营峰谷源新能源科技有限公司 | A kind of production method of takeup type sodium-ion battery |
| CN113036074A (en) * | 2019-12-09 | 2021-06-25 | 北京小米移动软件有限公司 | Battery cathode, processing method thereof and battery |
| CN211017288U (en) * | 2019-12-19 | 2020-07-14 | 溧阳中科海钠科技有限责任公司 | Sodium ion battery core |
| CN111040061A (en) * | 2019-12-26 | 2020-04-21 | 中国科学技术大学 | Solid sodium ion electrolyte, preparation method thereof and all-solid-state sodium battery |
| CN111952675A (en) * | 2020-08-20 | 2020-11-17 | 陕西科技大学 | High-performance all-solid-state sodium ion battery and preparation method thereof |
| CN112290081A (en) * | 2020-09-22 | 2021-01-29 | 江苏大学 | Manufacturing method of high-energy-density quasi-solid sodium ion battery |
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