CN110459810A - A kind of preparation method of lithium battery - Google Patents
A kind of preparation method of lithium battery Download PDFInfo
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- CN110459810A CN110459810A CN201910752663.1A CN201910752663A CN110459810A CN 110459810 A CN110459810 A CN 110459810A CN 201910752663 A CN201910752663 A CN 201910752663A CN 110459810 A CN110459810 A CN 110459810A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4235—Safety or regulating additives or arrangements in electrodes, separators or electrolyte
-
- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The invention discloses a kind of preparation methods of lithium battery, comprising: provides an insulating film；At least one first electrode layer is at least prepared on insulating film in such a way that the first slurry smear pressure；First slurry is to be mixed to get using electrolyte as solvent with first electrode raw material；Isolation is prepared in first electrode layer in such a way that the second slurry smear pressure and smears press mold；Second slurry is to be mixed to get using electrolyte as solvent with barrier material；It is at least smeared in such a way that third slurry smear pressure in isolation and at least one the second electrode lay is prepared on press mold；Third slurry is to be mixed to get using electrolyte as solvent with second electrode raw material；By insulating film and the first electrode layer being prepared, press mold is smeared in isolation and the second electrode lay is packaged to obtain lithium battery.The present invention solves material property in lithium battery preparation process and breaks through the problem of difficulty is big, and lithium battery is not able to satisfy high-energy density, high power density, long circulation life requirement.
Description
Technical field
The present invention relates to technical field of lithium batteries more particularly to a kind of preparation methods of lithium battery.
Background technique
With being continuously increased for mobile terminal ownership, core component one of of the battery as mobile terminal, demand item
Part is also higher and higher.Currently, the energy content of battery configured in dynamic terminal is generally relatively low, generally requires mobile power source and (also referred to as fill
Electricity is precious) electric energy supplement is carried out for the battery of mobile terminal.The sustainable energy of ion battery about 230wh/kg, energy density are about
600wh/L is not able to satisfy the requirement of high-energy density, high power density, long circulation life.And the performance of battery is mainly material
What material determined, the technological break-through of material is difficult, the period is very long, is also unfavorable for meeting high-energy density, high power density, length
The battery request of cycle life.
Summary of the invention
The present invention provides a kind of preparation method of lithium battery, solves material property in lithium battery preparation process and break through hardly possible
The problem of degree is big, and lithium battery is not able to satisfy high-energy density, high power density, long circulation life requirement.
In order to solve the above-mentioned technical problem, the embodiment of the invention provides a kind of preparation methods of lithium battery, comprising:
One insulating film is provided；
At least in such a way that the first slurry carries out smearing pressure, at least one first electrode is prepared on the insulating film
Layer；Wherein, first slurry is to be mixed to get using electrolyte as solvent with first electrode raw material；
In such a way that the second slurry carries out smearing pressure, isolation is prepared in the first electrode layer and smears press mold；Wherein,
Second slurry is to be mixed to get using electrolyte as solvent with barrier material；
At least in such a way that third slurry carries out smearing pressure, it is described isolation smear be prepared on press mold at least one second
Electrode layer；Wherein, the third slurry is to be mixed to get using electrolyte as solvent with second electrode raw material；
The insulating film and the first electrode layer being prepared, the isolation are smeared into press mold and the second electrode
Layer is packaged, and obtains lithium battery.
Optionally, the first electrode layer includes: that the first current collector film and first smear press mold；
It is described at least in such a way that the first slurry carries out smearing pressure, be prepared on the insulating film at least one first
Electrode layer, comprising:
First collector is prepared on the insulating film or the first electrode layer using the first conductive metal
Film；
The first slurry for being mixed with the electrolyte is used to be vibrated with the first preset frequency and/or the first predetermined amplitude
Described first is prepared in first current collector film and smears press mold for the mode for smearing pressure.
Optionally, the first conductive metal of the use is prepared described on the insulating film or the first electrode layer
First current collector film, comprising:
The first conductive metal is vapor-deposited in the insulating film or described by the way of vacuum evaporation or magnetron sputtering
In first electrode layer, first current collector film is obtained.
Optionally, described to use the first slurry for being mixed with the electrolyte predetermined with the first preset frequency and/or first
Amplitude carries out the mode that pressure is smeared in vibration, and described first is prepared in first current collector film and smears press mold, comprising:
By weight solid content be 55~90%, viscosity is 3500~20000cP, and is mixed with the first slurry of the electrolyte
Material is smeared in such a way that the first preset frequency and/or the first predetermined amplitude are vibrated and is pressed in first current collector film, obtains described
First smears press mold.
Optionally, described in such a way that the second slurry carries out smearing pressure, isolation is prepared in the first electrode layer
Smear press mold, comprising:
By weight solid content be 5~80%, viscosity is 500~15000cP, and is mixed with the second slurry of the electrolyte
Material is smeared in such a way that the second preset frequency and/or the second predetermined amplitude vibrate and is pressed in the first electrode layer, obtain it is described every
From smearing press mold.
Optionally, the second electrode lay includes: that the second current collector film and second smear press mold；
It is described at least in such a way that third slurry carries out smearing pressure, smear at least one be prepared on press mold in the isolation
The second electrode lay, comprising:
The third slurry for being mixed with the electrolyte is used to be vibrated with third preset frequency and/or third predetermined amplitude
The mode for smearing pressure smears in the isolation and described second is prepared on press mold smears press mold；
It is smeared using the second conductive metal described second and second current collector film is prepared on press mold.
Optionally, described to use the third slurry for being mixed with the electrolyte predetermined with third preset frequency and/or third
Amplitude carries out vibration and smears the mode of pressure, smears in the isolation and described second is prepared on press mold smears press mold, comprising:
By weight solid content be 55~90%, viscosity is 3500~20000cP, and is mixed with the third slurry of the electrolyte
Material is smeared in such a way that third preset frequency and/or third predetermined amplitude vibrate and is pressed in the isolation and smears press mold or second electricity
On the layer of pole, obtains described second and smear press mold.
Optionally, second collector is prepared in described smeared using the second conductive metal described second on press mold
Film, comprising:
Second conductive metal is vapor-deposited by the way of vacuum evaporation or magnetron sputtering and smears pressure described second
On film, the second current collector film is obtained；Alternatively,
Metal film made of second conductive metal is bonded in described second to smear on press mold, obtains second afflux
Body film.
Optionally, the preparation method of the lithium battery further includes at least one of following:
Using electrolyte as solvent, by first electrode raw material by way of planetary spiral paddle stirring, at 20~85 DEG C
At a temperature of, the first slurry is prepared；
Using electrolyte as solvent, by barrier material by way of planetary spiral paddle stirring, in 20~85 DEG C of temperature
Under, the second slurry is prepared；
Using electrolyte as solvent, by second electrode raw material by way of planetary spiral paddle stirring, at 20~85 DEG C
At a temperature of, the third slurry is prepared；
Wherein, first slurry is one of anode sizing agent and negative electrode slurry, and the third slurry is the anode
Another kind in slurry and the negative electrode slurry.
Optionally, the preparation method of the lithium battery further includes at least one of following:
Using electrolyte as solvent, first binder is dissolved, and negative electrode material, the are mixed by the first binder of dissolution
One conductive agent, obtains negative electrode slurry；
Using electrolyte as solvent, the second binder is dissolved, and by the second binder mixing isolated material of dissolution, is obtained
To second slurry；
Using electrolyte as solvent, third binder is dissolved, and pass through the third binder blended anode material of dissolution, the
Two conductive materials, obtain anode sizing agent；
Wherein, the anode sizing agent is one of first slurry and the third slurry, and the negative electrode slurry is
Another kind in first slurry and the third slurry.
The beneficial effect of the embodiment of the present invention is:
In above scheme, the first slurry, the second slurry and third slurry are prepared as solvent by electrolyte, and then use
The mode that first slurry smear pressure, which prepares first electrode layer, prepares isolation in such a way that the second slurry smear pressure smears press mold
The second electrode lay is prepared in such a way that third slurry smear pressure, to guarantee between insulating film and the first electrode layer,
The first electrode layer with it is described be isolated smear between press mold, the isolation is smeared between press mold and the second electrode lay, at least two
Between a first electrode layer and between at least two the second electrode lays, atom or Molecular Adsorption formula is respectively adopted
Intimate contact reduces and leads to substantially increase stability in battery charge and discharge process and substantially reduce intermediary's substance
Electric internal resistance, and then solve that lithium ion battery specific energy is low, energy density is low, specific power is low, power density is low, security performance
Difference, the problem that cycle-index is few, operating temperature range is narrow, kilowatt hour investment density is big, the production cycle is long.And by be electrolysed
The technique of liquid slurrying also reduces the preparation process flow of traditional lithium battery, is conducive to improve production efficiency, reduction is produced into
This.
Detailed description of the invention
Fig. 1 shows the flow charts of the preparation method of the lithium battery of the embodiment of the present invention；
One of the structural schematic diagram of lithium battery of Fig. 2 expression embodiment of the present invention；
Fig. 3 indicates the second structural representation of the lithium battery of the embodiment of the present invention；
One of the schematic diagram for smearing pressure device of Fig. 4 expression embodiment of the present invention；
Fig. 5 indicates the two of the schematic diagram for smearing pressure device of the embodiment of the present invention.
Specific embodiment
The exemplary embodiment that the present invention will be described in more detail below with reference to accompanying drawings.Although showing the present invention in attached drawing
Exemplary embodiment, it being understood, however, that may be realized in various forms the present invention without should be by embodiments set forth here
It is limited.It is to be able to thoroughly understand the present invention on the contrary, providing these embodiments, and can be by the scope of the present invention
It is fully disclosed to those skilled in the art.
As shown in Figure 1, the embodiment provides a kind of preparation methods for mentioning battery, comprising:
Step 11: an insulating film is provided.
Optionally, insulating film can use polyethylene terephthalate (PET) film, and thickness range is 2~15 μm.
Step 12: at least in such a way that the first slurry carries out smearing pressure, at least one is prepared on the insulating film
First electrode layer.
Wherein, first slurry is to be mixed to get using electrolyte as solvent with first electrode raw material.
Optionally, the first electrode layer includes: that the first current collector film and first smear press mold；Above-mentioned steps 12 can be specific
Include:
First collector is prepared on the insulating film or the first electrode layer using the first conductive metal
Film；It uses the first slurry for being mixed with the electrolyte to carry out vibration with the first preset frequency and/or the first predetermined amplitude and smears pressure
Mode, described first is prepared in first current collector film and smears press mold；Such as: by weight solid content be 55~90%,
Viscosity is 3500~20000cP, and the first slurry for being mixed with electrolyte is smeared and is pressed in first current collector film, obtains first
Press mold is smeared, to reduce contact resistance caused by various welding.
Optionally, above-mentioned steps 12 can also specifically include:
First collector is prepared on the insulating film or the first electrode layer using the first conductive metal
Film.
Such as: the first conductive metal is vapor-deposited in the insulating film by the way of vacuum evaporation or magnetron sputtering or
In the first electrode layer, the first current collector film is obtained.
As a kind of implementation, which can be reticular membrane.Specifically, can in the insulating film or
A netted mold is first placed in the first electrode layer, and then by the first conductive gold by the way of vacuum evaporation or magnetron sputtering
Belong to vapor deposition in mold, further takes out after mold i.e. on the insulating film or the first electrode layer, formation reticular structure
The first current collector film.In this way, in the case where guaranteeing that the first current collector film has the function of conductive afflux, it is possible to reduce conductive gold
The dosage of category, achievees the purpose that save the cost, also advantageously improves the specific energy of lithium battery.
Optionally, the thickness range of first current collector film are as follows: 0.2~10 μm.
The first slurry for being mixed with the electrolyte is used to be vibrated with the first preset frequency and/or the first predetermined amplitude
Described first is prepared in first current collector film and smears press mold for the mode for smearing pressure.
Such as: by weight solid content be 55~90%, viscosity is 3500~20000cP, and is mixed with the electrolyte
First slurry is smeared in such a way that the first preset frequency and/or the first predetermined amplitude are vibrated and is pressed in first current collector film, obtains
Press mold is smeared to described first.
Wherein, described that the first slurry is used to carry out the side that pressure is smeared in vibration with the first preset frequency and/or the first predetermined amplitude
Formula, in particular to during the first slurry smears pressure imposes preset frequency and/or pre- to push type broach tool is smeared using high-frequency transducer
The vibration for determining amplitude is compacted slurry vibration, so as to improve the tap density of slurry, to reach the effect of lithium battery energy density
Fruit.
It should be noted that first preset frequency and/or first is in advance when the characteristic such as the first slurry meets preparation condition
The value for determining amplitude can be 0, i.e., can also be without vibration.Specifically, first preset frequency and/or the first predetermined amplitude
It can be specifically arranged according to the characteristic (such as concentration, admixture) of the first slurry, the present invention is not especially limited.
Optionally, the described first thickness range for smearing press mold are as follows: 3~170 μm.
Optionally, which can be using electrolyte as solvent, and first electrode raw material is passed through planetary spiral paddle
The mode of stirring, 20~85 DEG C at a temperature of be prepared.Wherein, when the first slurry is as negative electrode slurry, this first
Electrode material may include: first binder, negative electrode material and the first conductive agent；Specifically, the negative electrode slurry can by with
Electrolyte dissolves first binder as solvent, and mixes negative electrode material, the first conductive agent system by the first binder of dissolution
It is standby to obtain.
Wherein, when the first slurry is as anode sizing agent, which may include: the second binder, cathode
Material and the second conductive agent；Specifically, the negative electrode slurry can dissolve the second binder by using electrolyte as solvent, and
It is prepared by the second binder blended anode material, the second conductive agent of dissolution.
The case where below for first electrode layer as cathode, illustrates the above method:
Specifically, by the way of vacuum evaporation or magnetron sputtering by fine copper (Cu) vapor deposition on the insulating film,
Obtain negative current collector film (such as: the negative current collector film of reticular structure)；Again be 55~90% by weight solid content, viscosity is
3500~20000cP, and it is mixed with the 360mAh/g artificial graphite (i.e. the first slurry, or be negative electrode slurry) of electrolyte, it smears
Be pressed on the negative current collector film (or smeared in such a way that the first preset frequency and/or the first predetermined amplitude are vibrated and be pressed in institute
State negative current collector film), so that forming cathode smears press mold.
Wherein, the first slurry or be negative electrode slurry, be using electrolyte as solvent, dissolution first binder (such as: gathering inclined fluorine
Ethylene (PVDF)), and the first binder dissolving mixes made of negative electrode material and the first conductive agent.
Optionally, when first electrode layer be it is multiple when, first by by the way of vacuum evaporation or magnetron sputtering by first
Conductive metal is vapor-deposited on the insulating film, obtains the first current collector film of the first order；Such as: realization as one preferred
Mode can be the preparation method using the first current collector film in above-described embodiment, obtain the first current collector film of reticular structure,
In the case where guaranteeing that the first current collector film has the function of conductive afflux, it is possible to reduce the dosage of conductive metal reaches saving
The purpose of cost also advantageously improves the specific energy of lithium battery；Again will be using electrolyte as solvent, manufactured weight solid content is 55
~90%, viscosity is 3500~20000cP, and is mixed with the first slurry of electrolyte, smears the first collection for being pressed in the first order
On fluid film (or smeared in such a way that the first preset frequency and/or the first predetermined amplitude are vibrated and be pressed in first current collector film
On), obtain the first order first smears press mold, to obtain the first electrode layer of the first order.
Further, the first conductive metal is vapor-deposited described first by the way of vacuum evaporation or magnetron sputtering
In the first electrode layer of grade, the first current collector film (the first current collector film of such as reticular structure) of the second level is obtained；It again will be with electricity
Solution liquid is solvent, and manufactured weight solid content is 55~90%, viscosity is 3500~20000cP, and is mixed with the of electrolyte
One slurry, smear and be pressed in the first current collector film of the second level (or shaken with the first preset frequency and/or the first predetermined amplitude
Dynamic mode, which is smeared, to be pressed in first current collector film), obtain the second level first smears press mold, to obtain the first of the second level
Electrode layer；The rest may be inferred so as to prepare multiple first electrode layers.
Step 13: in such a way that the second slurry carries out smearing pressure, isolation being prepared in the first electrode layer and smears pressure
Film.
Wherein, second slurry is to be mixed to get using electrolyte as solvent with barrier material.
Optionally, above-mentioned steps 13 can specifically include:
By weight solid content be 3~80%, viscosity is 500~15000cP, and the second slurry for being mixed with electrolyte smears pressure
In the first electrode layer, obtains isolation and smear press mold.
Optionally, above-mentioned steps 13 can also specifically include:
By weight solid content be 5~80%, viscosity is 500~15000cP, and is mixed with the second slurry of the electrolyte
Material is smeared in such a way that the second preset frequency and/or the second predetermined amplitude vibrate and is pressed in the first electrode layer, obtain it is described every
From smearing press mold.
Wherein, described that the second slurry is used to carry out the side that pressure is smeared in vibration with the second preset frequency and/or the second predetermined amplitude
Formula, in particular to during the second slurry smears pressure imposes preset frequency and/or pre- to push type broach tool is smeared using high-frequency transducer
The vibration for determining amplitude is compacted slurry vibration, so as to improve the tap density of slurry, to reach the effect of lithium battery energy density
Fruit.
It should be noted that second preset frequency and/or second is in advance when the characteristic such as the second slurry meets preparation condition
The value for determining amplitude can be 0, i.e., can also be without vibration.Specifically, second preset frequency and/or the second predetermined amplitude
It can be specifically arranged according to the characteristic (such as concentration, admixture) of the second slurry, the present invention is not especially limited.
Optionally, described that the thickness range for smearing press mold is isolated are as follows: 3~15um.
Optionally, which can be using electrolyte as solvent, and barrier material is passed through planetary spiral paddle stirring
Mode, 20~85 DEG C at a temperature of be prepared.Such as: it can be using electrolyte as solvent, dissolve the second binder
(such as: Kynoar (PVDF)), and by dissolution the second binder mix barrier material, be made weight solid content be 3~
80%, viscosity is 500~15000cP, and is mixed with the Kynoar (PVDF) of electrolyte to get to the second slurry.
Step 14: at least in such a way that third slurry carries out smearing pressure, smearing in the isolation and be prepared at least on press mold
One the second electrode lay.
Wherein, the third slurry is to be mixed to get using electrolyte as solvent with second electrode raw material.
Optionally, the second electrode lay includes: that the second current collector film and second smear press mold；Above-mentioned steps 14 can be specific
Include:
In such a way that the third slurry for being mixed with the electrolyte carries out smearing pressure, smears in the isolation and be prepared on press mold
Press mold is smeared to described second.Such as: being 55~90%, viscosity by weight solid content are as follows: 3500~20000cP, and it is mixed with electrolysis
The third slurry of liquid smear be pressed in it is described smeared on press mold or the second electrode lay in the isolation, obtain second and smear press mold；It adopts again
It is smeared with the second conductive metal described second and second current collector film is prepared on press mold.Optionally, above-mentioned steps 14 are gone back
It can specifically include:
The third slurry for being mixed with the electrolyte is used to be vibrated with third preset frequency and/or third predetermined amplitude
The mode for smearing pressure smears in the isolation and described second is prepared on press mold smears press mold；
Such as: by weight solid content be 55~90%, viscosity is 3500~20000cP, and is mixed with the electrolyte
Third slurry is smeared in such a way that third preset frequency and/or third predetermined amplitude vibrate and is pressed in the isolation and smears press mold or described
On the second electrode lay, obtains described second and smear press mold.
Wherein, described that third slurry is used to carry out the side that pressure is smeared in vibration with third preset frequency and/or third predetermined amplitude
Formula, in particular to during third slurry smears pressure imposes preset frequency and/or vibration to push type broach tool is smeared using high-frequency transducer
The vibration of width is compacted slurry vibration, so as to improve the tap density of slurry, to achieve the effect that lithium battery energy density.
It should be noted that the third preset frequency and/or third are pre- when the characteristic such as third slurry meets preparation condition
The value for determining amplitude can be 0, i.e., can also be without vibration.Specifically, the third preset frequency and/or third predetermined amplitude
It can be specifically arranged according to the characteristic (such as concentration, admixture) of third slurry, the present invention is not especially limited.
Optionally, the described second thickness range for smearing press mold are as follows: 3~170 μm.
Optionally, which can be using electrolyte as solvent, and second electrode raw material is passed through planetary spiral paddle
The mode of stirring, 20~85 DEG C at a temperature of be prepared.
Wherein, wherein when the second slurry is as negative electrode slurry, the second electrode raw material may include: first binder,
Negative electrode material and the first conductive agent；Specifically, the negative electrode slurry can be by the way that using electrolyte as solvent, dissolution first be bonded
Agent, and the first binder by dissolving mixes negative electrode material, the first conductive agent is prepared.
Wherein, when the second slurry is as anode sizing agent, which may include: the second binder, cathode
Material and the second conductive agent；Specifically, the negative electrode slurry can dissolve the second binder by using electrolyte as solvent, and
It is prepared by the second binder blended anode material, the second conductive agent of dissolution.
It is smeared using the second conductive metal described second and second current collector film is prepared on press mold.
Specifically, described second can be led by the way of vacuum evaporation or magnetron sputtering as a kind of implementation
Electric metal vapor deposition is smeared on press mold described second, obtains the second current collector film.Preferably, which can be
Reticular membrane.A netted mold is first placed on press mold specifically, can smear described second, and then is splashed using vacuum evaporation or magnetic control
Second conductive metal is vapor-deposited in mold by the mode penetrated, and smears on press mold described second after further taking out mold, is formed
Second current collector film of reticular structure.In this way, being improved in the case where guaranteeing that the second current collector film has the function of conductive afflux
Adhesive force of the pole piece in current collector film improves battery security and service life.
As another implementation, metal film made of second conductive metal can be bonded in described second and smeared
On press mold, second current collector film is obtained.Preferably, metal mesh made of the second conductive metal is glued by the way of bonding
It connects and is smeared on press mold described second, obtain the second current collector film, to guarantee the second current collector film with conductive afflux function
In the case of, adhesive force of the pole piece in current collector film is improved, battery security and service life are improved.Optionally, second afflux
The thickness range of body film are as follows: 0.2~10 μm.
The above method is specifically described in situation below for the second electrode lay as anode:
Specifically, can be 55~90% by weight solid content, viscosity is 3500~20000cP, and is mixed with electrolyte
163mAh/g NCM622 (i.e. third slurry, or be anode sizing agent), smear to be pressed in the isolation and smear and form anode on press mold and smear
Press mold (or smear to be pressed in the isolation and smear in such a way that third preset frequency and/or third predetermined amplitude vibrate and be formed on press mold
Anode smears press mold), then fine aluminium (Al) is vapor-deposited by the way of vacuum evaporation or magnetron sputtering and smears press mold described second
On, it obtains plus plate current-collecting body film (such as: the plus plate current-collecting body film of reticular structure), or by fine aluminium system by the way of bonding agent bonding
At aluminium net be bonded in described second and smear on press mold, obtain plus plate current-collecting body film.
Wherein, third slurry or be anode sizing agent, be using electrolyte as solvent, dissolution first binder (such as: gathering inclined fluorine
Ethylene (PVDF)), and the first binder blended anode material (such as: positive active material) and the second conductive agent system for passing through dissolution
At.
Optionally, when the second electrode lay is multiple, be first 55~90% by weight solid content, viscosity be 3500~
20000cP, and be mixed with the third slurry of electrolyte, smear be pressed in it is described smear on press mold in the isolation it is (or predetermined with third
Frequency and/or third predetermined amplitude vibration mode smear be pressed in it is described isolation smear on press mold formed anode smear press mold), obtain first
The second of grade smears press mold；The second conductive metal is vapor-deposited described first by the way of vacuum evaporation or magnetron sputtering again
The second of grade is smeared on press mold, obtains the second current collector film of the first order, or by the second conductive gold by the way of bonding agent bonding
Metal mesh made of belonging to is bonded in the second of the first order and smears on press mold, obtains the second current collector film of the first order, thus
To the second electrode lay of the first order.
It further, is 55~90%, viscosity by weight solid content are as follows: 3500~20000cP, and it is mixed with electrolyte
Third slurry smear be pressed in it is described in the second current collector film of the first order, obtain the second of the second level smear press mold (or with
Third preset frequency and/or third predetermined amplitude vibration mode smear be pressed in it is described isolation smear on press mold formed anode smear press mold)；
The second conductive metal is vapor-deposited by the way of vacuum evaporation or magnetron sputtering again and smears press mold the second of the second level
On, the second current collector film of the second level is obtained, or by metal made of the second conductive metal by the way of bonding agent bonding
What net was bonded in the second level second smears on press mold, the second current collector film of the second level is obtained, to obtain the of the second level
Two electrode layers, and so on, so as to which multiple the second electrode lays are prepared.
Step 15: press mold and described is smeared into the insulating film and the first electrode layer being prepared, the isolation
The second electrode lay is packaged, and obtains lithium battery.
The insulating film and the first electrode layer being prepared, the isolation are smeared into press mold specifically, can be
Folded or wound with the second electrode lay, and carry out electrolyte impregnate fluid infusion after, cure package obtains lithium battery.
Such as: press mold and described the are smeared into the insulating film and the first electrode layer being prepared, the isolation
Two electrode layers are folded or are wound, and are carried out after electrolyte impregnates 0~4h fluid infusion, 60~100 DEG C at a temperature of pressurize 0
~2MPa carries out curing molding, then encapsulates to obtain the lithium battery.
Specifically, can be wanted according to the size (such as: length) and battery capacity and voltage of lithium battery to be prepared
The parameters such as ask to be folded into: capacity 8400mAh, size 6mm*65mm*80mm；Then after carrying out electrolyte immersion 0~4h fluid infusion, In
It is encapsulated in aluminum plastic film again after pressurization 0~2MPa curing molding in 60~100 DEG C of temperature environments, obtains lithium battery.
Optionally, Battery formation, battery high-temperature aging, battery shaping and room temperature aging can also be successively carried out after packaging
Etc. techniques, and then obtain lithium battery.
In this way, reachable according to lithium battery capacity 8400mAh, size 6mm*65mm*80mm made of above-mentioned technique, specific energy
330~350wh/kg, energy density are up to 1000~1500wh/L, cycle life 3500 times, circulation state-of-charge (State of
Charge, SOC) reach 85% or more, security performance puncture extruding is missing of ignition, does not explode.
Optionally, the preparation method of above-mentioned lithium battery can also include at least one of the following:
In advance using electrolyte as solvent, by first electrode raw material by way of planetary spiral paddle stirring, at 20~85 DEG C
At a temperature of, the first slurry is prepared；In case subsequent pressure technique of smearing is used.
In advance using electrolyte as solvent, by second electrode raw material by way of planetary spiral paddle stirring, at 20~85 DEG C
At a temperature of, third slurry is prepared；In case subsequent pressure technique of smearing is used.
In advance using electrolyte as solvent, by barrier material by way of planetary spiral paddle stirring, in 20~85 DEG C of temperature
Under degree, second slurry is prepared；In case subsequent pressure technique of smearing is used.
Wherein, first slurry is one of anode sizing agent and negative electrode slurry, and the third slurry is anode sizing agent
With the another kind in negative electrode slurry.Further, it can also be in advance using electrolyte as solvent, dissolve first binder,
And negative electrode material, the first conductive agent are mixed by the first binder of dissolution, and by way of planetary spiral paddle stirring, 20
At a temperature of~85 DEG C, negative electrode slurry is obtained；
In advance using electrolyte as solvent, the second binder is dissolved, and pass through the second binder of dissolution mixing isolation material
Material, and by way of planetary spiral paddle stirring, 20~85 DEG C at a temperature of, obtain second slurry；
And in advance using electrolyte as solvent, third binder is dissolved, and just by the mixing of the third binder of dissolution
Pole material, the second conductive material, and by way of planetary spiral paddle stirring, 20~85 DEG C at a temperature of, obtain positive slurry
Material.
Wherein, the anode sizing agent is one of first slurry and the third slurry, and the negative electrode slurry is
Another kind in first slurry and the third slurry.
It as shown in Figures 2 and 3, is the lithium battery being prepared using above-mentioned preparation method, below to the embodiment of the present invention
The preparation method of lithium battery be specifically described:
The preparation flow of the lithium battery of the embodiment of the present invention successively includes: material baking, computer ingredient, high viscosity mixing system
Slurry, metal vacuum plated film are smeared and are pressed into film, smear press mold and fold, fold and smear press mold cure package, the compound press mold Battery formation, multiple smeared
Conjunction smears the aging of press mold battery high-temperature, compound smear the shaping of press mold battery and room temperature aging, compound smears press mold battery screening storage.
Technological parameter includes at least: the solid content and viscosity of positive/negative slurry smear press mold thickness, smear pressure cutting-tool angle, folding
It is folded to smear press mold solidification temperature.
It is specifically described below in conjunction with preparation flow of the design parameter to above-mentioned lithium battery:
In advance using electrolyte as solvent, using planetary spiral paddle stirring method, whipping temp is controlled in 60 ± 10 DEG C of ranges,
Weight solid content 55~90%, 3500~20000cP of viscosity, obtain highly viscous positive/negative slurry (i.e. above-mentioned first slurry/
Third slurry)；And using electrolyte as solvent, using planetary spiral paddle stirring method, whipping temp is controlled in 60 ± 10 DEG C of models
It encloses, weight solid content 5~50%, 500~15000cP of viscosity, obtains highly viscous isolation slurry (i.e. above-mentioned second slurry)；
An insulating film 21 is provided, material can be PET material；
It is vapor-deposited on insulating film 21 using conductive metals such as Cu or Ni by the methods of vacuum evaporation or magnetron sputtering,
Negative current collector film 22 is obtained, with a thickness of 0.2~10 μm；
Successively smears pressure device using shown in Fig. 2 again, according at least one above embodiment, negative electrode slurry is smeared be pressed in it is negative
In pole current collector film 22, obtains cathode and smear press mold 23, with a thickness of 3~170 μm；Isolation slurry is smeared and is pressed in cathode and smears press mold 23
On, it obtains isolation and smears press mold 24, with a thickness of 3~15um；Anode sizing agent is smeared and is pressed in isolation and smears on press mold 24, anode is obtained and smears pressure
Film 25, with a thickness of 3~70um；
Then it is vapor-deposited using conductive metals such as Al by the methods of vacuum evaporation or magnetron sputtering and smears press mold in anode
On 25, plus plate current-collecting body film 26 is obtained, with a thickness of 0.2~10 μm；Or the Al net bonding directlyed adopt with a thickness of 0.2~10 μm
It is smeared on press mold 25 in anode, obtains plus plate current-collecting body film 26, to improve production efficiency.
It is folded, is encapsulated in aluminum plastic film according to the size of design battery and battery capacity and voltage requirements；Again according to
It is secondary that lithium battery is made after the techniques such as Battery formation, battery high-temperature aging, battery shaping and room temperature aging.Optionally, may be used also
Press mold is smeared so that finish compound will be folded to carry out pressurizeing 0 in 60~100 DEG C of temperature environments after electrolyte impregnates 0~4h fluid infusion
After~2MPa curing molding, it is encapsulated in aluminum plastic film；Again successively by Battery formation, battery high-temperature aging, battery shaping and often
Lithium battery is made after the techniques such as warm aging.
Optionally, the positive/negative tab connection selection of lithium battery in the embodiment is real using conductive metal gas-phase deposition coating
It is existing, it is possible to reduce contact resistance caused by various welding；Selection is realized by the way of metal mesh bonding, and production effect can be improved
Rate.Concrete technology flow process can be arranged according to the performance and production requirement of lithium battery, and invention is not limited thereto.
Specifically, pressure device of smearing as shown in Figure 4 and Figure 5 includes: to smear flattening bench 41, smear compression mould 42, smear push type broach tool 43；
Wherein, it smears flattening bench 41 to be fixed in Equipment Foundations, 304 stainless steel flat plates can be used by smearing flattening bench 41；Smear compression mould 42 by
Pressing, which is scheduled on, smears on flattening bench 41, and 304 stainless steel thin slices can be used by smearing compression mould 42；Polyethylene can be used by smearing push type broach tool 43
Scraper plate；It smears push type broach tool 43 to contact with compression mould 42 is smeared, extrusion is smeared by side-to-side movement and smears press mold 44 (such as: anode smears press mold, or bears
Press mold is smeared in pole, or press mold is smeared in isolation).Optionally, smearing push type broach to have the angle in 43 side-to-side movement directions is 0~90 °.
In above scheme, the first slurry, the second slurry and third slurry are prepared as solvent by electrolyte, and then use
The mode that first slurry smear pressure, which prepares first electrode layer, prepares isolation in such a way that the second slurry smear pressure smears press mold
The second electrode lay is prepared in such a way that third slurry smear pressure, to guarantee between insulating film and the first electrode layer,
The first electrode layer with it is described be isolated smear between press mold, the isolation is smeared between press mold and the second electrode lay, at least two
Between a first electrode layer and between at least two the second electrode lays, atom or Molecular Adsorption formula is respectively adopted
Intimate contact reduces and leads to substantially increase stability in battery charge and discharge process and substantially reduce intermediary's substance
Electric internal resistance, and then solve that lithium ion battery specific energy is low, energy density is low, specific power is low, power density is low, security performance
Difference, the problem that cycle-index is few, operating temperature range is narrow, kilowatt hour investment density is big, the production cycle is long.And by be electrolysed
The technique of liquid slurrying also reduces the preparation process flow of traditional lithium battery, is conducive to improve production efficiency, reduction is produced into
This.
In the description of the present invention, term " first ", " second " are used for description purposes only, and should not be understood as instruction or dark
Show relative importance or implicitly indicates the quantity of indicated technical characteristic.The feature of " first ", " second " is defined as a result,
It can explicitly or implicitly include one or more of the features.In the description of the present invention, the meaning of " plurality " is extremely
It is two few, such as two, three etc., unless otherwise specifically defined.
Above-described is the preferred embodiment of the present invention, it should be pointed out that the ordinary person of the art is come
It says, can also make several improvements and retouch under the premise of not departing from principle of the present invention, these improvements and modifications also exist
In protection scope of the present invention.
Claims (10)
1. a kind of preparation method of lithium battery characterized by comprising
One insulating film is provided；
At least in such a way that the first slurry carries out smearing pressure, at least one first electrode layer is prepared on the insulating film；
Wherein, first slurry is to be mixed to get using electrolyte as solvent with first electrode raw material；
In such a way that the second slurry carries out smearing pressure, isolation is prepared in the first electrode layer and smears press mold；Wherein, described
Second slurry is to be mixed to get using electrolyte as solvent with barrier material；
At least in such a way that third slurry carries out smearing pressure, is smeared in the isolation and at least one second electrode is prepared on press mold
Layer；Wherein, the third slurry is to be mixed to get using electrolyte as solvent with second electrode raw material；
By the insulating film and the first electrode layer being prepared, the isolation smear press mold and the second electrode lay into
Row encapsulation, obtains lithium battery.
2. the preparation method of lithium battery according to claim 1, which is characterized in that the first electrode layer includes: first
Current collector film and first smears press mold；
It is described at least in such a way that the first slurry carries out smearing pressure, at least one first electrode is prepared on the insulating film
Layer, comprising:
First current collector film is prepared on the insulating film or the first electrode layer using the first conductive metal；
It uses the first slurry for being mixed with the electrolyte to carry out vibration with the first preset frequency and/or the first predetermined amplitude and smears pressure
Mode, described first is prepared in first current collector film and smears press mold.
3. the preparation method of lithium battery according to claim 2, which is characterized in that described to use the first conductive metal in institute
It states and first current collector film is prepared in insulating film or the first electrode layer, comprising:
The first conductive metal is vapor-deposited in the insulating film or described first by the way of vacuum evaporation or magnetron sputtering
On electrode layer, first current collector film is obtained.
4. the preparation method of lithium battery according to claim 2, which is characterized in that described use is mixed with the electrolyte
The first slurry by the first preset frequency and/or the first predetermined amplitude carry out vibration smear pressure in a manner of, in first collector
Described first is prepared on film and smears press mold, comprising:
By weight solid content be 55~90%, viscosity is 3500~20000cP, and is mixed with the first slurry of the electrolyte,
It smears and is pressed in first current collector film in such a way that the first preset frequency and/or the first predetermined amplitude vibrate, obtain described the
One brush press mold.
5. the preparation method of lithium battery according to claim 1, which is characterized in that described to carry out smearing pressure using the second slurry
Mode, isolation is prepared in the first electrode layer and smears press mold, comprising:
By weight solid content be 5~80%, viscosity is 500~15000cP, and is mixed with the second slurry of the electrolyte, with
Second preset frequency and/or the mode of the second predetermined amplitude vibration are smeared and are pressed in the first electrode layer, are obtained the isolation and are smeared
Press mold.
6. the preparation method of lithium battery according to claim 1, which is characterized in that the second electrode lay includes: second
Current collector film and second smears press mold；
It is described at least in such a way that third slurry carries out smearing pressure, it is described isolation smear be prepared on press mold at least one second
Electrode layer, comprising:
It uses the third slurry for being mixed with the electrolyte to carry out vibration with third preset frequency and/or third predetermined amplitude and smears pressure
Mode, smeared in the isolation and described second is prepared on press mold smears press mold；
It is smeared using the second conductive metal described second and second current collector film is prepared on press mold.
7. the preparation method of lithium battery according to claim 6, which is characterized in that described use is mixed with the electrolyte
Third slurry by third preset frequency and/or third predetermined amplitude carry out vibration smear pressure in a manner of, it is described isolation smear press mold
On be prepared described second and smear press mold, comprising:
By weight solid content be 55~90%, viscosity is 3500~20000cP, and is mixed with the third slurry of the electrolyte,
It is smeared in such a way that third preset frequency and/or third predetermined amplitude vibrate and is pressed in the isolation and smears press mold or the second electrode lay
On, it obtains described second and smears press mold.
8. the preparation method of lithium battery according to claim 6, which is characterized in that described to use the second conductive metal in institute
It states second and smears and second current collector film is prepared on press mold, comprising:
Second conductive metal is vapor-deposited by the way of vacuum evaporation or magnetron sputtering and is smeared on press mold described second,
Obtain the second current collector film；Alternatively,
Metal film made of second conductive metal is bonded in described second to smear on press mold, obtains second collector
Film.
9. the preparation method of lithium battery according to any one of claim 1 to 8, which is characterized in that further include with down toward
One item missing:
Using electrolyte as solvent, by first electrode raw material by way of planetary spiral paddle stirring, in 20~85 DEG C of temperature
Under, the first slurry is prepared；
Using electrolyte as solvent, by barrier material by way of planetary spiral paddle stirring, 20~85 DEG C at a temperature of, system
It is standby to obtain the second slurry；
Using electrolyte as solvent, by second electrode raw material by way of planetary spiral paddle stirring, in 20~85 DEG C of temperature
Under, the third slurry is prepared；
Wherein, first slurry is one of anode sizing agent and negative electrode slurry, and the third slurry is the anode sizing agent
With the another kind in the negative electrode slurry.
10. the preparation method of lithium battery according to any one of claim 1 to 8, which is characterized in that further include with down toward
One item missing:
Using electrolyte as solvent, first binder is dissolved, and lead by the first binder of dissolution mixing negative electrode material, first
Electric agent, obtains negative electrode slurry；
Using electrolyte as solvent, the second binder is dissolved, and by the second binder mixing isolated material of dissolution, obtains institute
State the second slurry；
Using electrolyte as solvent, third binder is dissolved, and lead by the third binder blended anode material of dissolution, second
Electric material obtains anode sizing agent；
Wherein, the anode sizing agent is one of first slurry and the third slurry, and the negative electrode slurry is described
Another kind in first slurry and the third slurry.
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| CN201910752663.1A CN110459810A (en) | 2019-08-15 | 2019-08-15 | A kind of preparation method of lithium battery |
| PCT/CN2019/117830 WO2021027151A1 (en) | 2019-08-15 | 2019-11-13 | Method for preparing lithium battery |
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|---|---|---|---|---|
| CN111403715A (en) * | 2020-03-27 | 2020-07-10 | 清华大学深圳国际研究生院 | Semi-solid metal lithium negative electrode and lithium battery |
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