CN110061281B - Thin film battery and preparation method thereof - Google Patents
Thin film battery and preparation method thereof Download PDFInfo
- Publication number
- CN110061281B CN110061281B CN201910368401.5A CN201910368401A CN110061281B CN 110061281 B CN110061281 B CN 110061281B CN 201910368401 A CN201910368401 A CN 201910368401A CN 110061281 B CN110061281 B CN 110061281B
- Authority
- CN
- China
- Prior art keywords
- electrode
- plate
- hole
- pole plate
- pattern
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
- H01M10/0436—Small-sized flat cells or batteries for portable equipment
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Primary Cells (AREA)
- Cell Electrode Carriers And Collectors (AREA)
Abstract
The thin film battery prepared by the invention can be manufactured into various shapes, can be flexibly suitable for various wearable devices, and can well meet the market demand due to the fact that the battery needs to be adapted in various forms, for example, some through holes (such as through holes of watchbands) may be needed. Meanwhile, the thin film battery prepared by the invention can realize thinner thickness, and the mechanical flexibility and the electrochemical performance of the thin film battery are better. Experimental results show that the thin-film battery obtained by the invention can realize thinner thickness, such as 0.2 mm-0.9 mm. In certain embodiments of the invention, the thin film battery has a thickness of 0.56mm or 0.73 mm. After the thin film battery is bent 3000 times under the conditions that the bending radius is 3cm and the bending angle is 15 degrees, the resistance is 110-120% of the original resistance, and the capacity retention rate exceeds 80%.
Description
Technical Field
The invention relates to the technical field of thin film batteries, in particular to a thin film battery and a preparation method thereof.
Background
Over the past few years, the technological needs of the internet, portable electronics, and wearable devices have driven the development of thin film batteries. Among them, wearable devices are a major growing area, and are expected to occupy more market share. Currently, wearable devices such as smartwatches and smart glasses still use traditional lithium-ion or lithium-ion batteries to meet their capacity requirements. These batteries occupy a considerable volume and, therefore, it is difficult to reduce the thickness of the functional components of these wearable devices.
In order to solve the above problems, researchers developed thin film batteries. The current thin film battery is mainly manufactured by 2 methods. One is a vapor deposition method; another approach is to manufacture pouch cells in a similar manner, i.e., with only a few layers to achieve the desired thickness of the cell. The two methods are high in cost, or can only achieve limited thickness, such as the conventional thickness of a soft package battery can reach 1-2 mm, and thinner thickness cannot be obtained. Meanwhile, after the thin film battery in the prior art is bent more than 1000 times, the electrolyte leaks, and the capacity retention rate of the thin film battery is remarkably reduced.
Disclosure of Invention
In view of this, the technical problem to be solved by the present invention is to provide a thin film battery and a method for manufacturing the same, where the thin film battery provided by the present invention is flexibly applicable to various wearable devices, can achieve a thinner thickness, and has better electrochemical performance.
The invention provides a preparation method of a thin film battery, which comprises the following steps:
A) printing an electrode material on the position, away from the edge, of the electrode carrier substrate, and reserving a pattern of through holes in the printed electrode pattern to obtain an electrode plate; performing die cutting on the pattern of the through hole of the electrode plate to enable the electrode plate to generate the through hole, wherein the aperture of the through hole of the electrode plate is smaller than that of the through hole of the electrode pattern; the electrode polar plate comprises a positive polar plate and a negative polar plate;
die cutting is carried out on the diaphragm, so that the diaphragm generates a through hole, and the aperture of the through hole of the diaphragm is smaller than that of the through hole of the electrode pattern; the aperture of the through hole of the diaphragm is larger than that of the through hole of the electrode polar plate;
B) after die cutting, the negative pole plate and the positive pole plate are respectively cut, so that the negative pole plate and the positive pole plate are the same in size, and when the negative pole plate and the positive pole plate are overlapped, the through hole of the negative pole plate is the same in position as the through hole of the positive pole plate;
cutting the diaphragm after die cutting to enable the edge of the diaphragm to be larger than the edge of the electrode pattern and smaller than the edge of the electrode plate;
C) after cutting, the diaphragm is arranged between the positive pole plate and the negative pole plate, one surface of the positive pole plate, which contains the electrode patterns, faces the diaphragm, one surface of the negative pole plate, which contains the electrode patterns, faces the diaphragm, electrolyte is filled, and the thin film battery is obtained by packaging.
Preferably, the electrode carrier substrate includes:
a first base material layer;
the aluminum foil layer is compounded on the first substrate layer;
the second substrate layer is compounded on the aluminum foil layer;
and printing an electrode material on the second base material layer of the electrode carrier substrate.
Preferably, the first substrate layer, the aluminum foil layer and the second substrate layer are bonded by a binder.
Preferably, the first substrate layer is selected from one of a polyethylene terephthalate film, a polyethylene naphthalate film, a polypropylene film and a polystyrene film.
Preferably, the second substrate layer is one selected from the group consisting of a polyethylene terephthalate film, a polyethylene naphthalate film, a polypropylene film, a polystyrene film, a polyethylene film and an ethylene-vinyl acetate copolymer film.
Preferably, the second substrate layer is one of a polyethylene terephthalate film, a polyethylene naphthalate film, a polypropylene film and a polystyrene film, and the region of the positive electrode plate without the printed electrode pattern and the region of the negative electrode plate without the printed electrode pattern are packaged by bonding with a binder.
Preferably, the second substrate layer is one of a polypropylene film, a polyethylene film and an ethylene-vinyl acetate copolymer film, and the region of the positive electrode plate without the printed electrode pattern and the region of the negative electrode plate without the printed electrode pattern are sealed by heat sealing.
Preferably, when the printed electrode material is a positive electrode material, the printed electrode pattern is a positive electrode pattern, and the obtained electrode plate is a positive electrode plate;
when the printed electrode material is a negative electrode material, the printed electrode pattern is a negative electrode pattern, and the obtained electrode plate is a negative electrode plate.
The invention also provides a thin film battery prepared by the preparation method.
The invention provides a preparation method of a thin film battery, the thin film battery prepared by the invention can be manufactured into various shapes, can be flexibly suitable for various wearable devices, and can well meet the market demand due to the fact that the battery needs to be adapted in various forms, for example, some through holes (such as through holes of watchbands) may be needed. Meanwhile, the thin film battery prepared by the invention can realize thinner thickness, and the mechanical flexibility and the electrochemical performance of the thin film battery are better.
Experimental results show that the thin-film battery obtained by the invention can realize thinner thickness, such as 0.2 mm-0.9 mm. In certain embodiments of the invention, the thin film battery has a thickness of 0.56mm or 0.73 mm. After the thin film battery is bent 3000 times under the conditions that the bending radius is 3cm and the bending angle is 15 degrees, the resistance is 110-120% of the original resistance, and the capacity retention rate exceeds 80%.
Drawings
Fig. 1 is a structural view of an electrode pad and a separator in example 1;
fig. 2 is a structural view of one electrode pad and a separator in example 2.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments of the present invention, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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 invention.
The invention provides a preparation method of a thin film battery, which comprises the following steps:
A) printing an electrode material on the position, away from the edge, of the electrode carrier substrate, and reserving a pattern of through holes in the printed electrode pattern to obtain an electrode plate; performing die cutting on the pattern of the through hole of the electrode plate to enable the electrode plate to generate the through hole, wherein the aperture of the through hole of the electrode plate is smaller than that of the through hole of the electrode pattern; the electrode polar plate comprises a positive polar plate and a negative polar plate;
die cutting is carried out on the diaphragm, so that the diaphragm generates a through hole, and the aperture of the through hole of the diaphragm is smaller than that of the through hole of the electrode pattern; the aperture of the through hole of the diaphragm is larger than that of the through hole of the electrode polar plate;
B) after die cutting, the negative pole plate and the positive pole plate are respectively cut, so that the negative pole plate and the positive pole plate are the same in size, and when the negative pole plate and the positive pole plate are overlapped, the through hole of the negative pole plate is the same in position as the through hole of the positive pole plate;
cutting the diaphragm after die cutting to enable the edge of the diaphragm to be larger than the edge of the electrode pattern and smaller than the edge of the electrode plate;
C) after cutting, the diaphragm is arranged between the positive pole plate and the negative pole plate, one surface of the positive pole plate, which contains the electrode patterns, faces the diaphragm, one surface of the negative pole plate, which contains the electrode patterns, faces the diaphragm, electrolyte is filled, and the thin film battery is obtained by packaging.
Printing an electrode material on a position, away from the edge, of an electrode carrier substrate, and reserving a pattern of through holes in the printed electrode pattern to obtain an electrode plate; and performing die cutting on the pattern of the through hole of the electrode polar plate to enable the electrode polar plate to generate the through hole, wherein the aperture of the through hole of the electrode polar plate is smaller than that of the through hole of the electrode pattern. In the embodiment of the present invention, the following is specifically provided:
printing a positive electrode material on the position, away from the edge, of the positive electrode carrier substrate, and reserving a pattern of through holes in the printed positive electrode pattern to obtain a positive electrode plate; die cutting is carried out on the pattern of the through hole of the positive pole plate, so that the positive pole plate generates the through hole, and the aperture of the through hole of the positive pole plate is smaller than that of the through hole of the positive pole pattern;
printing a negative electrode material on the position, away from the edge, of the negative electrode carrier substrate, and reserving a pattern of through holes in the printed negative electrode pattern to obtain a negative electrode plate; and die cutting is carried out on the pattern of the through hole of the negative pole plate, so that the negative pole plate generates the through hole, and the aperture of the through hole of the negative pole plate is smaller than that of the through hole of the negative pole pattern.
In an embodiment of the present invention, the electrode carrier substrate includes:
a first base material layer;
the aluminum foil layer is compounded on the first substrate layer;
the second substrate layer is compounded on the aluminum foil layer;
and printing an electrode material on the second base material layer of the electrode carrier substrate.
In an embodiment of the present invention, the first substrate layer, the aluminum foil layer and the second substrate layer are bonded by a binder. The present invention is not particularly limited in the kind of the adhesive, and may be any adhesive known to those skilled in the art, and in some embodiments, the adhesive is selected from one of a polyacrylic resin adhesive, an epoxy resin adhesive, a polyurethane adhesive, and an acrylic type adhesive.
In an embodiment of the present invention, the first substrate layer is selected from one of a polyethylene terephthalate film, a polyethylene naphthalate film, a polypropylene film, and a polystyrene film.
In an embodiment of the present invention, the aluminum foil layer is an aluminum foil.
In an embodiment of the present invention, the second substrate layer is one selected from the group consisting of a polyethylene terephthalate film, a polyethylene naphthalate film, a polypropylene film, a polystyrene film, a polyethylene film, and an ethylene-vinyl acetate copolymer film.
In an embodiment of the present invention, when the second substrate layer is one of a polyethylene terephthalate film, a polyethylene naphthalate film, a polypropylene film, and a polystyrene film, the region of the positive electrode plate where the electrode pattern is not printed and the region of the negative electrode plate where the electrode pattern is not printed may be adhesively encapsulated by a binder. In certain embodiments of the present invention, the adhesive is a pressure sensitive adhesive.
In an embodiment of the present invention, when the second substrate layer is one of a polypropylene film, a polyethylene film, and an ethylene-vinyl acetate copolymer film, the region of the positive electrode plate on which the electrode pattern is not printed and the region of the negative electrode plate on which the electrode pattern is not printed may be encapsulated by heat sealing. The temperature of the heat-sealed package is not particularly limited in the present invention, and the temperature of the heat-sealed package known to those skilled in the art can be used.
The thicknesses of the first substrate layer, the aluminum foil layer and the second substrate layer are not limited in particular, and can be selected according to actual requirements. In some embodiments of the invention, the thickness of the first substrate layer is 0.03-0.05 mm. In certain embodiments, the thickness of the first substrate layer is 0.03mm or 0.05 mm. In some embodiments of the invention, the thickness of the second substrate layer is 0.03-0.07 mm. In certain embodiments, the thickness of the second substrate layer is 0.03mm or 0.07 mm. In some embodiments of the present invention, the aluminum foil layer has a thickness of 0.02 to 0.06 mm. In certain embodiments, the aluminum foil layer has a thickness of 0.02mm, 0.05mm, or 0.06 mm.
In some embodiments of the present invention, a positive electrode material is printed on the positive electrode carrier substrate at a position away from the edge, and a pattern of through holes is left in the printed positive electrode pattern, so as to obtain a positive electrode plate, specifically: printing a positive current collector material on a position, away from the edge, of a positive carrier substrate, leaving a pattern of through holes in the printed positive current collector pattern, and then printing a positive material on the positive current collector material to obtain a positive electrode plate.
In some embodiments of the present invention, the negative electrode material is printed on the negative electrode carrier substrate at a position away from the edge, and a pattern of through holes is left in the printed negative electrode pattern, so as to obtain the negative electrode plate, specifically: printing a negative current collector material on a position, away from the edge, of a negative carrier substrate, leaving a pattern of through holes in the printed negative current collector pattern, and then printing a negative material on the negative current collector material to obtain a negative electrode plate.
The size of the positive current collector pattern is the same as that of the positive electrode pattern, and the aperture of the through hole of the positive current collector pattern is the same as that of the through hole of the positive electrode pattern. The size of the negative current collector pattern is the same as that of the negative electrode pattern, and the aperture of the through hole of the negative current collector pattern is the same as that of the through hole of the negative electrode pattern.
The electrode current collector material (including the positive electrode current collector material and the negative electrode current collector material) is not particularly limited in the present invention, and may be any material known to those skilled in the art. In certain embodiments of the present invention, the positive current collector material comprises carbon powder. In certain embodiments of the present invention, the negative current collector material comprises carbon powder.
The electrode materials (including the positive electrode material and the negative electrode material) are not particularly limited in the present invention, and those well known to those skilled in the art may be used. In certain embodiments of the invention, the positive electrode material comprises manganese dioxide; the negative electrode material includes graphite, carbon nanohorns, or zinc.
The thickness of the electrode current collector pattern (including the positive electrode current collector pattern and the negative electrode current collector pattern) is not particularly limited, and can be selected according to actual needs. In some embodiments of the present invention, the thickness of the positive electrode current collector pattern is 0.08mm, and the thickness of the negative electrode current collector pattern is 0.08 mm. The thickness of the electrode patterns (including the positive electrode pattern and the negative electrode pattern) is not particularly limited, and may be selected according to actual needs. In some embodiments of the present invention, the thickness of the positive electrode pattern is 0.08mm, and the thickness of the negative electrode pattern is 0.08 mm.
In the embodiment of the invention, the aperture of the through hole of the positive pole plate is the same as that of the through hole of the negative pole plate; the aperture of the through hole of the positive electrode pattern is the same as the aperture of the through hole of the negative electrode pattern. In the embodiment of the present invention, the through holes of the positive electrode pattern are circular, and may be rectangular or square.
In embodiments of the invention where the printing is screen printing, this screen printing technique, which is suitable for roll-to-roll production, makes it possible to produce thin film batteries at low cost, since it enables the different layers of the battery to be manufactured and assembled at high speed in a continuous process.
In some embodiments of the present invention, after the printing of the electrode current collector material is completed, baking is further included. The baking temperature is 60-120 ℃, and the baking time is 8-12 min. The electrode current collector material is a positive electrode current collector material or a negative electrode current collector material.
In some embodiments of the present invention, after the printing of the electrode material is completed, baking is further included. The baking temperature is 60-120 ℃, and the baking time is 8-12 min. In certain embodiments of the present invention, after the printing, rolling is further included. The rolling method according to the present invention is not particularly limited, and a rolling method known to those skilled in the art may be used. The electrode material is a positive electrode material or a negative electrode material.
The diaphragm is subjected to die cutting, so that the diaphragm generates a through hole, and the aperture of the through hole of the diaphragm is smaller than that of the through hole of the electrode pattern; the aperture of the through hole of the diaphragm is larger than that of the through hole of the electrode polar plate.
In an embodiment of the present invention, the aperture of the through hole of the separator is smaller than the aperture of the through hole of the positive electrode pattern, and the aperture of the through hole of the separator is smaller than the aperture of the through hole of the negative electrode pattern; and the aperture of the through hole of the diaphragm is larger than that of the through hole of the anode plate, and the aperture of the through hole of the diaphragm is larger than that of the through hole of the cathode plate.
In an embodiment of the present invention, a material of the separator is selected from one of a non-woven fabric, a polymer, and a ceramic. The polymer is not particularly limited in the present invention, and polymers suitable for a separator, which are well known to those skilled in the art, may be used. In certain embodiments of the invention, the polymer may be polyvinylidene fluoride, polyvinylidene fluoride-hexafluoropropylene, or polyvinylidene fluoride-trifluoroethylene.
The thickness of the diaphragm is not particularly limited, and can be selected according to actual needs. In certain embodiments of the invention, the membrane has a thickness of 0.05 mm.
After the die cutting is finished, the negative pole plate and the positive pole plate are respectively cut, so that the negative pole plate and the positive pole plate are the same in size, and when the negative pole plate and the positive pole plate are overlapped, the position of the through hole of the negative pole plate is the same as that of the through hole of the positive pole plate.
In the embodiment of the present invention, the slit positive electrode plate and the slit negative electrode plate may have various shapes, and the present invention is not particularly limited to this, and may be selected according to actual needs. In some embodiments of the present invention, the slit positive electrode plate and the slit negative electrode plate are both rectangular, and the size of the rectangle is 3.5cm × 5.5 cm.
And cutting the membrane after die cutting to ensure that the edge of the membrane is larger than the edge of the electrode pattern and smaller than the edge of the electrode plate. In the embodiment of the present invention, the following is specifically provided: and cutting the diaphragm subjected to die cutting, so that the edge of the diaphragm is larger than the edge of the positive electrode pattern and smaller than the edge of the positive electrode plate, and the edge of the diaphragm is larger than the edge of the negative electrode pattern and smaller than the edge of the negative electrode plate.
In the embodiment of the present invention, the slit diaphragm may have various shapes, and the present invention is not limited to this, and may be selected according to actual needs. In some embodiments of the invention, the slit membrane is rectangular, the dimensions of the rectangle being 3cm x 4 cm.
After the cutting is finished, the diaphragm is arranged between the positive pole plate and the negative pole plate, one surface of the positive pole plate, which contains the positive pole patterns, faces the diaphragm, one surface of the negative pole plate, which contains the negative pole patterns, faces the diaphragm, electrolyte is filled, and the thin film battery is obtained through packaging.
The electrolyte is not particularly limited in the present invention, and an electrolyte that can be applied to a thin film battery, which is well known to those skilled in the art, may be used. In certain embodiments of the invention, the electrolyte comprises 26 wt% ammonium chloride, 8.8 wt% zinc chloride, 0.5 wt% zinc corrosion inhibitor, and 64.7 wt% water; or the electrolyte comprises 26 wt% of ammonium chloride, 8.8 wt% of zinc chloride and 65.2 wt% of water.
The source of the raw material components used in the present invention is not particularly limited, and may be generally commercially available.
The thin film battery prepared by the invention can be manufactured into various shapes, can be flexibly suitable for various wearable devices, and can well meet the market demand due to the fact that the battery needs to be adapted in various forms, for example, some through holes (such as through holes of a watchband) may be needed. Meanwhile, the thin film battery prepared by the invention can realize thinner thickness, and the mechanical flexibility and the electrochemical performance of the thin film battery are better.
The invention also provides a thin film battery prepared by the preparation method. The thin film battery can be in various shapes, can be flexibly suitable for various wearable devices, and can well meet the market demand due to the fact that the battery needs to be adapted to various forms, for example, through holes (such as through holes of a watchband) may be needed. Meanwhile, the thin film battery prepared by the invention can realize thinner thickness, and the mechanical flexibility and the electrochemical performance of the thin film battery are better.
Experimental results show that the thin-film battery obtained by the invention can realize thinner thickness, such as 0.2 mm-0.9 mm. In certain embodiments of the invention, the thin film battery has a thickness of 0.56mm or 0.73 mm. The thin film battery is bent 3000 times under the conditions that the bending radius is 3cm and the bending angle is 15 degrees, the resistance is 110-120% of the original resistance, and the capacity retention rate exceeds 80%.
In some cases, a higher operating potential may be required and in some cases, a higher capacity may be required, which results in the need to connect thin film batteries in series or in parallel.
In certain embodiments of the present invention, a series design of two thin film batteries is presented. The positive electrode of one thin film battery and the negative electrode of the other thin film battery are maintained at the same potential using a common current collector, and then the counter electrode of each thin film battery is placed to obtain thin film batteries after series connection. The concrete structure comprises: the first thin film battery, compound the current collector layer on the said first thin film battery, compound the second thin film battery on the said current collector layer; the positive pole plate of the first thin film battery is compounded with the current collector layer, and the negative pole plate of the second thin film battery is compounded with the current collector layer.
The number of the thin film batteries connected in series is not particularly limited, and the number of the thin film batteries can be selected according to actual needs.
In some embodiments of the invention, a parallel design of two thin film batteries is presented. The concrete structure comprises: the first thin film battery, compound the current collector layer on the said first thin film battery, compound the second thin film battery on the said current collector layer; the positive pole plate of the first thin film battery is compounded with the current collector layer, and the positive pole plate of the second thin film battery is compounded with the current collector layer;
or
The concrete structure comprises: the first thin film battery, compound the current collector layer on the said first thin film battery, compound the second thin film battery on the said current collector layer; the negative electrode plate of the first thin film battery is compounded with the current collector layer, and the negative electrode plate of the second thin film battery is compounded with the current collector layer.
The number of the thin film batteries connected in parallel is not particularly limited, and the number of the thin film batteries can be selected according to actual needs.
In order to further illustrate the present invention, the following detailed description of a thin film battery and a method for manufacturing the same is provided in connection with examples, which should not be construed as limiting the scope of the present invention.
The starting components used in the following examples are all generally commercially available.
Example 1
The positive carrier substrate includes:
an aluminum foil layer with a thickness of 0.02 mm;
respectively bonding a polyethylene terephthalate film with the thickness of 0.03mm on the front side and the back side of the aluminum foil layer;
the adhesive used for bonding is polyacrylic resin adhesive.
The negative electrode carrier substrate includes:
an aluminum foil layer with a thickness of 0.05 mm;
respectively bonding a polyethylene terephthalate film with the thickness of 0.03mm on the front side and the back side of the aluminum foil layer;
the adhesive used for bonding is polyacrylic resin adhesive.
Printing carbon powder of a positive current collector material on the position, away from the edge, of the positive carrier substrate in a screen printing mode, wherein the printing thickness is 0.08mm, a pattern of a circular through hole with the diameter of 2cm is reserved in the printed positive current collector pattern, after baking at 120 ℃ for 8min, printing manganese dioxide on the positive current collector material, the printing thickness is 0.08mm, then, after baking at 120 ℃, rolling to obtain a positive electrode plate; die cutting is carried out on the pattern of the through hole of the positive pole plate, so that the positive pole plate is provided with a circular through hole with the diameter of 1 cm;
screen-printing carbon powder of a negative current collector material on the position, away from the edge, of the negative carrier substrate, wherein the printing thickness is 0.08mm, a pattern of a circular through hole with the diameter of 2cm is reserved in the printed negative current collector pattern, after baking at 120 ℃ for 8min, zinc powder is printed on the negative current collector material, the printing thickness is 0.08mm, and then, after baking at 120 ℃, rolling is carried out to obtain a negative electrode plate; die cutting is carried out on the pattern of the through hole of the negative pole plate, so that the negative pole plate is provided with a circular through hole with the diameter of 1 cm;
the diaphragm is a non-woven fabric fiber diaphragm, and the thickness of the diaphragm is 0.05 mm. The diaphragm was die cut such that the diaphragm produced a circular through hole having a diameter of 1.5 cm.
And after die cutting is finished, respectively cutting the negative pole plate and the positive pole plate to enable the negative pole plate and the positive pole plate to be rectangular (3.5cm multiplied by 5.5cm) with the same size, and when the negative pole plate and the positive pole plate are overlapped, the position of the through hole of the negative pole plate is the same as that of the through hole of the positive pole plate. And cutting the diaphragm subjected to die cutting to obtain a rectangular diaphragm, wherein the size of the diaphragm is 3cm multiplied by 4 cm.
After cutting, the diaphragm is arranged between the positive pole plate and the negative pole plate, one surface of the positive pole plate, which contains the positive pole pattern, faces the diaphragm, one surface of the negative pole plate, which contains the negative pole pattern, faces the diaphragm, electrolyte is filled, the electrolyte comprises 26 wt% of ammonium chloride, 8.8 wt% of zinc chloride and 65.2 wt% of water, and the thin film battery with the thickness of 0.56mm is obtained through bonding and packaging by pressure sensitive adhesive.
The structure of one of the electrode plates (positive electrode plate or negative electrode plate) and the separator is shown in fig. 1. Fig. 1 is a structural view of one electrode pad and a separator in example 1.
The detection shows that the capacity of the obtained thin film battery before bending is 13mAh, the internal resistance is 30 omega, the capacity of the thin film battery is changed into 11mAh after the thin film battery is bent 3000 times under the conditions that the bending radius is 3cm and the bending angle is 15 degrees, the capacity retention rate is 84.6 percent, the internal resistance is 34 omega, and the internal resistance is 113 percent of the original resistance.
Example 2
The positive carrier substrate includes:
a polyethylene naphthalate film having a thickness of 0.05 mm;
an aluminum foil layer having a thickness of 0.06mm bonded to the polyethylene naphthalate film;
a polypropylene film with the thickness of 0.07mm is bonded on the aluminum foil layer;
printing a positive electrode material on the polypropylene film of the positive electrode carrier substrate;
the adhesive used for bonding is an epoxy resin adhesive.
The negative electrode carrier substrate includes:
a polyethylene naphthalate film having a thickness of 0.05 mm;
an aluminum foil layer having a thickness of 0.06mm bonded to the polyethylene naphthalate film;
a polypropylene film with the thickness of 0.07mm is bonded on the aluminum foil layer;
printing a negative electrode material on the polypropylene film of the negative electrode carrier substrate;
the adhesive used for bonding is an epoxy resin adhesive.
Printing carbon powder of a positive current collector material on the position, away from the edge, of the positive carrier substrate in a screen printing mode, wherein the printing thickness is 0.08mm, a pattern of a circular through hole with the diameter of 2cm is reserved in the printed positive current collector pattern, after baking at 120 ℃ for 8min, printing manganese dioxide on the positive current collector material, the printing thickness is 0.08mm, then, after baking at 120 ℃, rolling to obtain a positive electrode plate; die cutting is carried out on the pattern of the through hole of the positive pole plate, so that the positive pole plate is provided with a circular through hole with the diameter of 1 cm;
screen-printing carbon powder of a negative current collector material on the position, away from the edge, of the negative carrier substrate, wherein the printing thickness is 0.08mm, a pattern of a circular through hole with the diameter of 2cm is reserved in the printed negative current collector pattern, after baking at 120 ℃ for 8min, zinc powder is printed on the negative current collector material, the printing thickness is 0.08mm, and then, after baking at 120 ℃, rolling is carried out to obtain a negative electrode plate; die cutting is carried out on the pattern of the through hole of the negative pole plate, so that the negative pole plate is provided with a circular through hole with the diameter of 1 cm;
the diaphragm is a non-woven fabric fiber diaphragm, and the thickness of the diaphragm is 0.05 mm. The diaphragm was die cut such that the diaphragm produced a circular through hole having a diameter of 1.5 cm.
And after die cutting is finished, respectively cutting the negative pole plate and the positive pole plate to enable the negative pole plate and the positive pole plate to be rectangular (3.5cm multiplied by 5.5cm) with the same size, and when the negative pole plate and the positive pole plate are overlapped, the position of the through hole of the negative pole plate is the same as that of the through hole of the positive pole plate. And cutting the diaphragm subjected to die cutting to obtain a rectangular diaphragm, wherein the size of the diaphragm is 3cm multiplied by 4 cm.
After the cutting is finished, the diaphragm is arranged between the positive pole plate and the negative pole plate, one surface of the positive pole plate, which contains the positive pole pattern, faces the diaphragm, one surface of the negative pole plate, which contains the negative pole pattern, faces the diaphragm, electrolyte is filled, the electrolyte comprises 26 wt% of ammonium chloride, 8.8 wt% of zinc chloride, 0.5 wt% of zinc corrosion inhibitor and 64.7 wt% of water, and the thin film battery with the thickness of 0.73mm is obtained through heat sealing and packaging.
The structure of one of the electrode pads (positive electrode pad or negative electrode pad) and the separator is shown in fig. 2. Fig. 2 is a structural view of one electrode pad and a separator in example 2.
The detection shows that the capacity of the obtained thin film battery before bending is 12.8mAh, the internal resistance is 32 omega, the capacity of the thin film battery is 11.1mAh after the thin film battery is bent 3000 times under the conditions that the bending radius is 3cm and the bending angle is 15 degrees, the capacity retention rate is 86.7 percent, the internal resistance is 35 omega, and the internal resistance is 109 percent of the original resistance.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. A preparation method of a thin film battery comprises the following steps:
A) printing an electrode material on the position, away from the edge, of the electrode carrier substrate, and reserving a pattern of through holes in the printed electrode pattern to obtain an electrode plate; performing die cutting on the pattern of the through hole of the electrode plate to enable the electrode plate to generate the through hole, wherein the aperture of the through hole of the electrode plate is smaller than that of the through hole of the electrode pattern; the electrode polar plate comprises a positive polar plate and a negative polar plate;
die cutting is carried out on the diaphragm, so that the diaphragm generates a through hole, and the aperture of the through hole of the diaphragm is smaller than that of the through hole of the electrode pattern; the aperture of the through hole of the diaphragm is larger than that of the through hole of the electrode polar plate;
B) after die cutting, the negative pole plate and the positive pole plate are respectively cut, so that the negative pole plate and the positive pole plate are the same in size, and when the negative pole plate and the positive pole plate are overlapped, the through hole of the negative pole plate is the same in position as the through hole of the positive pole plate;
cutting the diaphragm after die cutting to enable the edge of the diaphragm to be larger than the edge of the electrode pattern and smaller than the edge of the electrode plate;
C) after cutting, the diaphragm is arranged between the positive pole plate and the negative pole plate, one surface of the positive pole plate, which contains the electrode patterns, faces the diaphragm, one surface of the negative pole plate, which contains the electrode patterns, faces the diaphragm, electrolyte is filled, and the thin film battery is obtained by packaging.
2. The production method according to claim 1, wherein the electrode carrier substrate includes:
a first base material layer;
the aluminum foil layer is compounded on the first substrate layer;
the second substrate layer is compounded on the aluminum foil layer;
and printing an electrode material on the second base material layer of the electrode carrier substrate.
3. The production method according to claim 2, wherein the first substrate layer, the aluminum foil layer, and the second substrate layer are bonded by an adhesive.
4. The production method according to claim 2, wherein the first substrate layer is one selected from the group consisting of a polyethylene terephthalate film, a polyethylene naphthalate film, a polypropylene film, and a polystyrene film.
5. The production method according to claim 2, wherein the second substrate layer is one selected from the group consisting of a polyethylene terephthalate film, a polyethylene naphthalate film, a polypropylene film, a polystyrene film, a polyethylene film, and an ethylene-vinyl acetate copolymer film.
6. The manufacturing method according to claim 5, wherein the second substrate layer is one of a polyethylene terephthalate film, a polyethylene naphthalate film, a polypropylene film and a polystyrene film, and the region of the positive electrode plate without the printed electrode pattern and the region of the negative electrode plate without the printed electrode pattern are packaged by bonding with an adhesive.
7. The production method according to claim 5, wherein the second substrate layer is one of a polypropylene film, a polyethylene film and an ethylene-vinyl acetate copolymer film, and the region of the positive electrode plate on which the electrode pattern is not printed and the region of the negative electrode plate on which the electrode pattern is not printed are sealed by heat sealing.
8. The method according to claim 1, wherein when the printed electrode material is a positive electrode material, the printed electrode pattern is a positive electrode pattern, and the obtained electrode plate is a positive electrode plate;
when the printed electrode material is a negative electrode material, the printed electrode pattern is a negative electrode pattern, and the obtained electrode plate is a negative electrode plate.
9. A thin film battery produced by the production method according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910368401.5A CN110061281B (en) | 2019-05-05 | 2019-05-05 | Thin film battery and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910368401.5A CN110061281B (en) | 2019-05-05 | 2019-05-05 | Thin film battery and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110061281A CN110061281A (en) | 2019-07-26 |
| CN110061281B true CN110061281B (en) | 2021-03-30 |
Family
ID=67322148
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910368401.5A Active CN110061281B (en) | 2019-05-05 | 2019-05-05 | Thin film battery and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110061281B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111896879B (en) * | 2020-07-31 | 2023-06-06 | 北京石墨烯研究院 | Rapid detection method for bending life of flexible lithium ion battery |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03261070A (en) * | 1990-03-09 | 1991-11-20 | Sharp Corp | Sheet-shaped hydrogen storage alloy electrode and its manufacture |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104900841B (en) * | 2015-05-26 | 2018-03-30 | 广东烛光新能源科技有限公司 | Metal lithium bands and preparation method thereof and the energy storage device using the metal lithium bands |
| CN105355850A (en) * | 2015-12-03 | 2016-02-24 | 辉能（天津）科技发展有限公司 | Flexible electrode and battery employing same |
| CN105355851B (en) * | 2015-12-03 | 2018-08-24 | 辉能（天津）科技发展有限公司 | Flexible electrode with elongated hole and the battery comprising the electrode |
| CN107845774B (en) * | 2016-09-21 | 2020-12-08 | 中国科学院大连化学物理研究所 | Preparation method of self-supporting porous electrode, electrode and application thereof |
| CN106684434A (en) * | 2016-12-21 | 2017-05-17 | 成都国珈星际固态锂电科技有限公司 | Flexible solid lithium ion battery, manufacturing method thereof, intelligent watch and intelligent wearing device |
| CN208522025U (en) * | 2018-05-15 | 2019-02-19 | 苏州清陶新能源科技有限公司 | One kind having the electrode and its battery of " Bamboo summer sleeping mat structure " |
-
2019
- 2019-05-05 CN CN201910368401.5A patent/CN110061281B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03261070A (en) * | 1990-03-09 | 1991-11-20 | Sharp Corp | Sheet-shaped hydrogen storage alloy electrode and its manufacture |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110061281A (en) | 2019-07-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104681858B (en) | Ultrathin flexible lithium ion battery and preparation method thereof | |
| KR100440933B1 (en) | Battery unit and lithium polymer battery applying the same and the fabrication method thereof | |
| KR20020018180A (en) | Lithium secondary battery comprising individual cells connected with one another, as well as watches, computers and communication equipment provided with such a battery | |
| CN112002868B (en) | Electrochemical device and electronic device | |
| CN105406086B (en) | Electrochemical cell and preparation method thereof | |
| US11108106B2 (en) | Stretchable fabric based electrode-polymer electrolyte battery | |
| JP2006269288A (en) | Thin battery | |
| CN102969539A (en) | Ultra-thin lithium ion secondary battery | |
| CN104718653A (en) | Wrapped electrode assembly and method for manufacturing same | |
| WO2015013855A1 (en) | Electrode plate, shaping method of electrode plate and shaping method of lithium battery core having electrode plate | |
| CN110061281B (en) | Thin film battery and preparation method thereof | |
| CN109075396A (en) | Solid state secondary battery | |
| JP2002157997A (en) | Method of manufacturing collapsible lithium battery | |
| JPH076771A (en) | Film battery and manufacture thereof | |
| CN2582182Y (en) | Flow collector for polymer lithium ion cell | |
| TW201939803A (en) | Lithium ion secondary battery, lithium ion secondary battery negative electrode structure, and production method for lithium ion secondary battery | |
| CN209447852U (en) | Encapsulating film and battery, the electronic equipment of battery | |
| CN210129558U (en) | Lithium ion battery and lamination thereof | |
| JP2002050404A (en) | Structure of sheet-shaped lithium cell and manufacturing method of the same | |
| CN211455699U (en) | Backboard with positioning groove and flexible solar cell module packaged by backboard | |
| TWI810408B (en) | Lithium secondary battery | |
| CN108550774B (en) | Hole connection structure of combined laminated solid film battery pack | |
| CN208352376U (en) | Multi-layer sheet for encapsulation of lithium ion battery | |
| CN218918996U (en) | Lithium ion battery | |
| CN110752383A (en) | Flexible battery and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |