CN106898730A - A kind of preparation method of lithium rechargeable battery positive/negative plate - Google Patents
A kind of preparation method of lithium rechargeable battery positive/negative plate Download PDFInfo
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- CN106898730A CN106898730A CN201710236911.8A CN201710236911A CN106898730A CN 106898730 A CN106898730 A CN 106898730A CN 201710236911 A CN201710236911 A CN 201710236911A CN 106898730 A CN106898730 A CN 106898730A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
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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
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/131—Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
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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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Abstract
A kind of preparation method of lithium rechargeable battery positive/negative plate, the method comprises the following steps：First organic solvent, the first organic mixture and superconduction carbon black are stirred and are mixed to get the first coating；Again by the first coatings on the tow sides of positive battery collector or negative battery collector, by after oven for drying, obtaining positive pole composite current collector or negative pole composite current collector；Finally by the second coatings on the tow sides of positive pole composite current collector, by after oven for drying, obtaining lithium-ion secondary battery positive plate or negative plate with positive temperature sensitive properties；Implement the beneficial effect of the preparation method of lithium rechargeable battery positive/negative plate of the invention：Reduce the risk of over-charging of battery, improve the security performance of battery, extend lithium rechargeable battery with service life more long.
Description
Technical field
The present invention relates to technical field of lithium ion secondary, more specifically to a kind of lithium rechargeable battery just
The preparation method of negative plate.
Background technology
Lithium rechargeable battery is because with specific capacity is high, operating voltage is high, operating temperature range is wide, self-discharge rate is low, following
Ring long lifespan, it is pollution-free and lightweight the advantages of, therefore by industry extensive use.
Currently, compared with lead-acid battery, Ni-MH battery, lithium ion battery has had comparative advantage ground in 3 C consumer product areas
Position.On the other hand, energy-conserving and environment-protective requirement is adapted to, electric automobile has broad mass market prospect, and as its power source, lithium-ion electric
Pond has very big competitiveness.Either 3C Product or electric automobile, because its high request to energy makes its require electricity
Pond must be connected and parallel connection is used in groups.Require that battery there must be good uniformity under this use premise.But
It is, due to the limitation of current battery manufacturing process and the difference of raw material, the uniformity of lithium ion battery especially high-capacity battery
It is to be improved.Additionally, even if battery consistent performance in the fabrication process accesses guarantee, battery when using in groups, often
Can be because the position of its placement to be different, heat dissipation environment is not equal so that the capacity of the actual performance of battery difference.It is so electric
Pond is just very easy to overcharge in actual applications.
New anode material nickel cobalt manganese, its cheap price and good cycle performance, become 3C Product and electricity
The competitive material of motor-car lithium ion battery.But, when the battery of this kind of material composition is in serial connection charge, due to electricity
The difference of tankage, the relatively low battery of capacity is just easy to overcharge, so on the one hand can due to the problem of a battery cause it is whole
Individual battery cyclic is decayed rapidly, while also considerably increasing the potential safety hazard of battery.
The content of the invention
The technical problems to be solved by the invention be lithium ion battery in serial connection charge, due to the difference of battery capacity,
The relatively low battery of capacity is just easy to overcharge, and so on the one hand due to the problem of a battery whole battery cyclic can be caused fast
Speed decay, while also considerably increasing the potential safety hazard of battery, there is provided a kind of preparation side of lithium rechargeable battery positive/negative plate
Method, is used to solve existing problem.
The present invention solves above-mentioned technical problem, there is provided the following technical scheme for solving：A kind of lithium rechargeable battery is positive and negative
The preparation method of pole piece, the method comprises the following steps：
S11, the first organic solvent, the first organic mixture and superconduction carbon black are stirred it are mixed to get the first coating；
S12, by the first coatings on the tow sides of positive battery collector or negative battery collector, by baking oven dry
After dry, positive pole composite current collector or negative pole composite current collector are obtained；
S13, by the second coatings on the tow sides of positive pole composite current collector, by after oven for drying, obtain have just
The lithium-ion secondary battery positive plate or negative plate of temperature sensitive properties；
Wherein, first organic solvent is polar solvent；
First organic polymer is acrylics；
First coating is 8 μm~15 in the coating thickness of positive battery collector or the tow sides of negative battery collector
μm；
First mixed proportion is the 60%~70% of the first organic solvent, the 27%~37% of the first organic polymer or 26%~
36%；Second mixed proportion is the 3%~4% of superconduction carbon black.
In the preparation method of lithium rechargeable battery positive/negative plate of the invention, the step S11 includes having first
After machine solvent and the first organic polymer are mixed by the first mixed proportion, with lithium battery mixer according to the first rotating speed and
The stirring of one mixing time obtains the first stirring thing；The superconduction carbon black of the second mixed proportion is added in the first stirring thing again, and
Stirred according to the second rotating speed and the second mixing time with lithium battery mixer and obtain the first coating.
In the preparation method of lithium rechargeable battery positive/negative plate of the invention, first rotating speed is revolution rotating speed
20Hz, rotation rotating speed is 20Hz；First mixing time is 3H；Second rotating speed is revolution rotating speed 20Hz, rotation rotating speed
It is 20Hz；Second mixing time is 2H；Wherein, the ambient parameter of step S11 is carried out for 15~35 DEG C of temperature, humidity≤
40%RH。
In the preparation method of lithium rechargeable battery positive/negative plate of the invention, the polar solvent is N-methyl pyrroles
Alkanone（NMP）, the acrylics are polymethyl methacrylate（PMMA）；Wherein, first coating includes poly- first
Base methacrylate（PMMA）, N-methyl pyrrolidones（NMP）With superconduction carbon black, its corresponding proportioning is 65：36.5：3.5.
In the preparation method of lithium rechargeable battery positive/negative plate of the invention, second coating is positive electrode active material
Matter or negative electrode active material, the positive active material include cobalt acid lithium or cobalt acid lithium and violent acid lithium mixture, CNT slurry
Material, Kynoar binding agent and N-methyl pyrrolidinone solvent, its quality proportioning are 97：20：2：45；The negative pole is lived
Property material include graphite, carbon black conductive agent, sodium carboxymethylcellulose, butadiene-styrene rubber, Yi Jishui, its quality proportioning be 96.3: 1:
1.7: 1: 65。
In the preparation method of lithium rechargeable battery positive/negative plate of the invention, the positive battery collector and negative pole
Battery afflux liquid is respectively positive pole aluminium foil and negative copper foil.
In the preparation method of lithium rechargeable battery positive/negative plate of the invention, first coating and the second coating are adopted
Smearing mode is the mode of spraying or intaglio plate coating.
The preparation method of also a kind of positive active material for lithium-ion secondary battery positive plate of the invention, the method bag
Include following steps：
S21, by Kynoar binding agent（PVDF）With N-methyl pyrrolidinone solvent（NMP）Carried out according to respective quality ratio
After mixing, stirred according to the 3rd rotating speed and the 3rd mixing time with lithium battery mixer and be made the first cathode mix；
S22, the CNT by respective quality ratio（CNT）Slurry mixes in being added to the first cathode mix, uses lithium battery
Mixer is made the second cathode mix according to the 4th rotating speed and the stirring of the 4th mixing time；
S23, the cobalt acid lithium or cobalt acid lithium of respective quality ratio and violent acid lithium mixture are added in the second cathode mix and mixed
Close, stirred according to the 5th rotating speed and the 5th mixing time with lithium battery mixer and be made the 3rd cathode mix；
S24, the viscosity that the 3rd cathode mix is tested with viscosimeter, range of viscosities is controlled to 4000 ~ 6000mPa.s, if not existing
Range of viscosities is then to addition N-methyl pyrrolidinone solvent in the 3rd cathode mix（NMP）, stirred with lithium battery mixer
Mix, until the viscosity of the 3rd cathode mix is made in range of viscosities and obtains positive active material.
In the preparation method for the positive active material of lithium-ion secondary battery positive plate of the invention, the cobalt acid
Lithium or cobalt acid lithium and violent acid lithium mixture, CNT（CNT）Slurry, Kynoar binding agent（PVDF）With N-methyl pyrroles
Alkanone solvent（NMP）The mass ratio of configuration is 97：20：2：45.
In the preparation method for the positive active material of lithium-ion secondary battery positive plate of the invention, the described 3rd
Rotating speed is that revolution rotating speed is：15 ~ 40rpm, rotation rotating speed is：1000~2500rpm；3rd mixing time is 3H；Described
Four rotating speeds are that revolution rotating speed is：15 ~ 40rpm, rotation rotating speed is：1000~2500rpm；The 4th mixing time 2H；Described
Five rotating speeds are that revolution rotating speed is：15 ~ 40rpm, rotation rotating speed is：1000~2500rpm；The 5th mixing time 5H.
The present invention also provides a kind of preparation method of the negative electrode active material for lithium ion secondary battery negative pole piece, the party
Method comprises the following steps：
S31, by sodium carboxymethylcellulose（CMC）And aqueous solvent（H2O）Enter according to mass ratio 1.5~2% and 98~98.5% respectively
Row stirring is mixed to get the first negative electrode mix；
S32, by carbon black conductive agent（SP）Add in the first negative electrode mix, active material graphite is added after stirring（C）
It is stirred and obtains the second negative electrode mix；
S33, by butadiene-styrene rubber（SBR）Add in the second negative electrode mix, be stirring evenly and then adding into water and adjust its viscosity in viscosity
In the range of obtain negative electrode active material.
In the preparation method of the negative electrode active material for lithium ion secondary battery negative pole piece of the invention, the graphite
:Carbon black conductive agent:Sodium carboxymethylcellulose:Butadiene-styrene rubber:Water is respectively 96.3 according to quality proportioning：1：1.7：1：65.
Implement the preparation method of lithium rechargeable battery positive/negative plate of the invention, have the advantages that：Reduce electricity
The risk that pond overcharges, improves the security performance of battery, meanwhile, lithium rechargeable battery is extended with service life more long.
Brief description of the drawings
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing：
Fig. 1 is the schematic flow sheet of the preparation method of lithium rechargeable battery positive/negative plate of the invention；
Fig. 2 is that the flow of the preparation method of the positive active material for lithium-ion secondary battery positive plate of the invention is illustrated
Figure；
Fig. 3 is that the flow of the preparation method of the negative electrode active material for lithium ion secondary battery negative pole piece of the invention is illustrated
Figure.
Specific embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that specific embodiment described herein is only used to explain the present invention, not
For limiting the present invention.
As shown in figure 1, the schematic flow sheet of the preparation method for lithium rechargeable battery positive/negative plate of the invention；It is a kind of
The preparation method of lithium rechargeable battery positive/negative plate, the method comprises the following steps：
S11, the first organic solvent, the first organic mixture and superconduction carbon black are stirred it are mixed to get the first coating；
S12, by the first coatings on the tow sides of positive battery collector or negative battery collector, by baking oven dry
After dry, positive pole composite current collector or negative pole composite current collector are obtained；
S13, by the second coatings on the tow sides of positive pole composite current collector, by after oven for drying, obtain have just
The lithium-ion secondary battery positive plate or negative plate of temperature sensitive properties；
Wherein, first organic solvent is polar solvent；
First organic polymer is acrylics；
First coating is 8 μm~15 in the coating thickness of positive battery collector or the tow sides of negative battery collector
μm；
First mixed proportion is the 60%~70% of the first organic solvent, the 27%~37% of the first organic polymer or 26%~
36%；Second mixed proportion is the 3%~4% of superconduction carbon black.
In the preparation method of lithium rechargeable battery positive/negative plate of the invention, the step S11 includes having first
After machine solvent and the first organic polymer are mixed by the first mixed proportion, with lithium battery mixer according to the first rotating speed and
The stirring of one mixing time obtains the first stirring thing；The superconduction carbon black of the second mixed proportion is added in the first stirring thing again, and
Stirred according to the second rotating speed and the second mixing time with lithium battery mixer and obtain the first coating.
In the preparation method of lithium rechargeable battery positive/negative plate of the invention, first rotating speed is revolution rotating speed
20Hz, rotation rotating speed is 20Hz；First mixing time is 3H；Second rotating speed is revolution rotating speed 20Hz, rotation rotating speed
It is 20Hz；Second mixing time is 2H；Wherein, the ambient parameter of step S11 is carried out for 15~35 DEG C of temperature, humidity≤
40%RH。
In the preparation method of lithium rechargeable battery positive/negative plate of the invention, the polar solvent is N-methyl pyrroles
Alkanone（NMP）, the acrylics are polymethyl methacrylate（PMMA）；Wherein, first coating includes poly- first
Base methacrylate（PMMA）, N-methyl pyrrolidones（NMP）With superconduction carbon black, its corresponding proportioning is 65：36.5：3.5.
Further, first by the N-methyl pyrrolidones of 6.5Kg（NMP）With the polymethyl methacrylate of 3.65Kg
（PMMA ）, it is added in agitator tank, with lithium electricity mixer, revolution rotating speed 20Hz, rotation rotating speed 20Hz are set, 3 hours are stirred,
Add the superconduction carbon black of 0.35kg（SUPER P）With lithium electricity mixer, revolution rotating speed 20Hz, rotation rotating speed 20Hz, stirring are set
2 hours, PMMA matrix PTC material slurries are prepared, ambient parameter is 15-35 DEG C of temperature, humidity≤40%.
Further, obtained PMMA matrix PTC materials slurry is respectively coated by the way of spraying or intaglio plate coating
On the positive and negative of positive battery collector or negative battery collector, coating thickness 10um, positive pole Al/PTC composite current collectors
With negative pole Cu/PTC composite current collectors, for the making of further battery.
In the preparation method of lithium rechargeable battery positive/negative plate of the invention, second coating is positive electrode active material
Matter or negative electrode active material, the positive active material include cobalt acid lithium or cobalt acid lithium and violent acid lithium mixture, CNT slurry
Material, Kynoar binding agent and N-methyl pyrrolidinone solvent, its quality proportioning are 97：20：2：45；The negative pole is lived
Property material include graphite, carbon black conductive agent, sodium carboxymethylcellulose, butadiene-styrene rubber, Yi Jishui, its quality proportioning be 96.3: 1:
1.7: 1: 65。
In the preparation method of lithium rechargeable battery positive/negative plate of the invention, first rotating speed is revolution rotating speed
20Hz, rotation rotating speed is 20Hz；First mixing time is 3H；Second rotating speed is revolution rotating speed 20Hz, rotation rotating speed
It is 20Hz；Second mixing time is 2H；Wherein, the ambient parameter of step S11 is carried out for 15~35 DEG C of temperature, humidity≤
40%RH。
In the preparation method of lithium rechargeable battery positive/negative plate of the invention, the positive battery collector and negative pole
Battery afflux liquid is respectively positive pole aluminium foil and negative copper foil.
In the preparation method of lithium rechargeable battery positive/negative plate of the invention, first coating and the second coating are adopted
Smearing mode is the mode of spraying or intaglio plate coating.
As shown in Fig. 2 being the preparation method of the positive active material for lithium-ion secondary battery positive plate of the invention
Schematic flow sheet；The preparation method of also a kind of positive active material for lithium-ion secondary battery positive plate of the invention, should
Method comprises the following steps：
S21, by Kynoar binding agent（PVDF）With N-methyl pyrrolidinone solvent（NMP）Carried out according to respective quality ratio
After mixing, stirred according to the 3rd rotating speed and the 3rd mixing time with lithium battery mixer and be made the first cathode mix；
S22, the CNT by respective quality ratio（CNT）Slurry mixes in being added to the first cathode mix, uses lithium battery
Mixer is made the second cathode mix according to the 4th rotating speed and the stirring of the 4th mixing time；
S23, the cobalt acid lithium or cobalt acid lithium of respective quality ratio and violent acid lithium mixture are added in the second cathode mix and mixed
Close, stirred according to the 5th rotating speed and the 5th mixing time with lithium battery mixer and be made the 3rd cathode mix；
S24, the viscosity that the 3rd cathode mix is tested with viscosimeter, range of viscosities is controlled to 4000 ~ 6000mPa.s, if not existing
Range of viscosities is then to addition N-methyl pyrrolidinone solvent in the 3rd cathode mix（NMP）, stirred with lithium battery mixer
Mix, until the viscosity of the 3rd cathode mix is made in range of viscosities and obtains positive active material.
In the preparation method for the positive active material of lithium-ion secondary battery positive plate of the invention, the cobalt acid
Lithium or cobalt acid lithium and violent acid lithium mixture, CNT（CNT）Slurry, Kynoar binding agent（PVDF）With N-methyl pyrroles
Alkanone solvent（NMP）The mass ratio of configuration is 97：20：2：45.
In the preparation method for the positive active material of lithium-ion secondary battery positive plate of the invention, the described 3rd
Rotating speed is that revolution rotating speed is：15 ~ 40rpm, rotation rotating speed is：1000~2500rpm；3rd mixing time is 3H；Described
Four rotating speeds are that revolution rotating speed is：15 ~ 40rpm, rotation rotating speed is：1000~2500rpm；The 4th mixing time 2H；Described
Five rotating speeds are that revolution rotating speed is：15 ~ 40rpm, rotation rotating speed is：1000~2500rpm；The 5th mixing time 5H.
Further, specific implementation preparation process includes：S1：First add PVDF and NMP and according to mass ratio be 5：95 groups
Glue is made into lithium battery mixer is placed, wherein, lithium battery mixer mixing time is：3 hours, revolution rotating speed be：15~
40rpm, rotation rotating speed is：1000~2500rpm；
S2：Tubular conductive agent CNT is proportionally added into S1 steps to continue to stir, lithium battery mixer mixing time
For：2 hours, revolution rotating speed be：15 ~ 40rpm, rotation rotating speed is：1000~2500rpm；
S3：Mixture toward S2 steps adds active material cobalt acid lithium or cobalt acid lithium to be stirred with continuation in violent acid lithium mixture, lithium
Battery mixer mixing time is：5 hours, revolution rotating speed be：15 ~ 40rpm, rotation rotating speed is：1000~2500rpm；
S4：With viscosimeter testing size viscosity, range of viscosities is 4000 ~ 6000mPa.s.If slurry viscosity is not in the range of,
Then add N-methyl pyrrolidinone solvent NMP to continue to stir, be allowed to meet range of viscosities.
Further, it is obtained with being coated on by the way of spraying or intaglio plate coating by obtained positive active material
On the positive and negative of positive pole Al/PTC composite current collectors, so as to obtain the lithium ion secondary battery positive electrode with positive temperature sensitive properties
Piece.
Such as Fig. 3 is the flow of the preparation method of the negative electrode active material for lithium ion secondary battery negative pole piece of the invention
Schematic diagram.The present invention also provides a kind of preparation method of the negative electrode active material for lithium ion secondary battery negative pole piece, the party
Method comprises the following steps：
S31, by sodium carboxymethylcellulose（CMC）And aqueous solvent（H2O）Enter according to mass ratio 1.5~2% and 98~98.5% respectively
Row stirring is mixed to get the first negative electrode mix；
S32, by carbon black conductive agent（SP）Add in the first negative electrode mix, active material graphite is added after stirring（C）
It is stirred and obtains the second negative electrode mix；
S33, by butadiene-styrene rubber（SBR）Add in the second negative electrode mix, be stirring evenly and then adding into water and adjust its viscosity in viscosity
In the range of obtain negative electrode active material.
In the preparation method of the negative electrode active material for lithium ion secondary battery negative pole piece of the invention, the graphite
:Carbon black conductive agent:Sodium carboxymethylcellulose:Butadiene-styrene rubber:Water is respectively 96.3 according to quality proportioning：1：1.7：1：65.
Further, specific implementation step includes：First by CMC (sodium carboxymethylcellulose Sodium Carboxy Methyl
Cellulose binding agents) and aqueous solvent（H2O）According to mass ratio 1.5：98.5-2：98 are mixed, and are stirred with lithium electricity mixer
3 hours, conductive agent SP is added, after continuing to stir 1 hour, add active material graphite C（Native graphite and artificial stone
The mixture of ink）, continue to stir 2.5 hours；Add SBR to continue to stir 1 hour, be eventually adding the water of remaining 5%-10%, adjust
Save slurry viscosity suitable.
Further, it is obtained with being coated on by the way of spraying or intaglio plate coating by obtained negative electrode active material
On the positive and negative of negative pole Cu/PTC composite current collectors, so as to obtain the lithium ion secondary battery negative pole with positive temperature sensitive properties
Piece.
Compared with prior art, the preparation method of lithium rechargeable battery positive/negative plate of the invention is implemented, with following
Beneficial effect：Reduce the risk of over-charging of battery, improve the security performance of battery, meanwhile, extending lithium rechargeable battery has
Service life more long.
Embodiment described above only expresses embodiments of the present invention, and its description is more specific and detailed, but can not
Therefore it is interpreted as the limitation to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art,
Without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection model of the invention
Enclose.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (10)
1. a kind of preparation method of lithium rechargeable battery positive/negative plate, it is characterised in that the method comprises the following steps：
S11, the first organic solvent, the first organic mixture and superconduction carbon black are stirred it are mixed to get the first coating；
S12, by the first coatings on the tow sides of positive battery collector or negative battery collector, by baking oven dry
After dry, positive pole composite current collector or negative pole composite current collector are obtained；
S13, by the second coatings on the tow sides of positive pole composite current collector, by after oven for drying, obtain have just
The lithium-ion secondary battery positive plate or negative plate of temperature sensitive properties；
Wherein, first organic solvent is polar solvent；
First organic polymer is acrylics；
First coating is 8 μm~15 in the coating thickness of positive battery collector or the tow sides of negative battery collector
μm；
First mixed proportion is the 60%~70% of the first organic solvent, the 27%~37% of the first organic polymer or 26%~
36%；Second mixed proportion is the 3%~4% of superconduction carbon black.
2. the preparation method of lithium rechargeable battery positive/negative plate according to claim 1, it is characterised in that the step
After S11 includes being mixed the first organic solvent and the first organic polymer by the first mixed proportion, lithium battery mixer is used
The first stirring thing is obtained according to the first rotating speed and the stirring of the first mixing time；The superconduction carbon black of the second mixed proportion is added to again
In first stirring thing, and the first coating is obtained according to the second rotating speed and the stirring of the second mixing time with lithium battery mixer.
3. the preparation method of lithium rechargeable battery positive/negative plate according to claim 1, it is characterised in that the polarity
Solvent is N-methyl pyrrolidones NMP, and the acrylics are polymethyl methacrylate PMMA；Wherein, described first
Coating includes polymethyl methacrylate PMMA, N-methyl pyrrolidones NMP and superconduction carbon black, and its corresponding proportioning is 65：36.5：
3.5。
4. the preparation method of lithium rechargeable battery positive/negative plate according to claim 1, it is characterised in that described second
Coating is positive active material or negative electrode active material, and the positive active material is mixed comprising cobalt acid lithium or cobalt acid lithium and violent acid lithium
Compound, carbon nano tube paste, Kynoar binding agent and N-methyl pyrrolidinone solvent, its quality proportioning are 97：20：
2：45；The negative electrode active material includes graphite, carbon black conductive agent, sodium carboxymethylcellulose, butadiene-styrene rubber, Yi Jishui, its matter
Amount proportioning is 96.3: 1: 1.7: 1: 65.
5. the preparation method of lithium rechargeable battery positive/negative plate according to claim 1, it is characterised in that the positive pole
Battery afflux liquid and negative battery collector are respectively positive pole aluminium foil and negative copper foil.
6. the preparation method of lithium rechargeable battery positive/negative plate according to claim 1, it is characterised in that described first
The smearing mode that coating and the second coating are used is spraying or the mode of intaglio plate coating.
7. a kind of preparation method of positive active material for lithium-ion secondary battery positive plate, it is characterised in that the method
Comprise the following steps：
S21, Kynoar binding agent PVDF and N-methyl pyrrolidinone solvent NMP are mixed according to respective quality ratio
Afterwards, stirred according to the 3rd rotating speed and the 3rd mixing time with lithium battery mixer and be made the first cathode mix；
S22, the CNT CNT slurries of respective quality ratio are added in the first cathode mix and mixed, stirred with lithium battery
Mix machine and be made the second cathode mix according to the 4th rotating speed and the stirring of the 4th mixing time；
S23, the cobalt acid lithium or cobalt acid lithium of respective quality ratio and violent acid lithium mixture are added in the second cathode mix and mixed
Close, stirred according to the 5th rotating speed and the 5th mixing time with lithium battery mixer and be made the 3rd cathode mix；
S24, the viscosity that the 3rd cathode mix is tested with viscosimeter, range of viscosities is controlled to 4000 ~ 6000mPa.s, if not existing
Range of viscosities then to N-methyl pyrrolidinone solvent NMP is added in the 3rd cathode mix, is stirred with lithium battery mixer,
Until the viscosity of the 3rd cathode mix is made in range of viscosities and obtains positive active material.
8. the preparation method of the positive active material for lithium-ion secondary battery positive plate according to claim 7, its
It is characterised by, the cobalt acid lithium or cobalt acid lithium and violent acid lithium mixture, CNT CNT slurries, Kynoar binding agent
The mass ratio of PVDF and N-methyl pyrrolidinone solvent NMP configurations is 97：20：2：45.
9. a kind of preparation method of negative electrode active material for lithium ion secondary battery negative pole piece, it is characterised in that the method
Comprise the following steps：
S31, sodium carboxymethylcellulose CMC and aqueous solvent H2O are stirred according to mass ratio 1.5~2% and 98~98.5% respectively
Mix and be mixed to get the first negative electrode mix；
S32, by carbon black conductive agent SP add the first negative electrode mix in, active material graphite C is added after stirring to be carried out
Stirring obtains the second negative electrode mix；
S33, by styrene butadiene rubber sbr add the second negative electrode mix in, be stirring evenly and then adding into water and adjust its viscosity in viscosity model
Negative electrode active material is obtained in enclosing.
10. the preparation method of the negative electrode active material for lithium ion secondary battery negative pole piece according to claim 9, its
It is characterised by, the graphite：Carbon black conductive agent：Sodium carboxymethylcellulose：Butadiene-styrene rubber：Water is respectively according to quality proportioning
96.3：1：1.7：1：65.
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| CN201710236911.8A CN106898730A (en) | 2017-04-12 | 2017-04-12 | A kind of preparation method of lithium rechargeable battery positive/negative plate |
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| CN201710236911.8A CN106898730A (en) | 2017-04-12 | 2017-04-12 | A kind of preparation method of lithium rechargeable battery positive/negative plate |
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| CN201710236911.8A Pending CN106898730A (en) | 2017-04-12 | 2017-04-12 | A kind of preparation method of lithium rechargeable battery positive/negative plate |
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| EP3694027A4 (en) * | 2017-11-08 | 2020-12-09 | Contemporary Amperex Technology Co., Limited | Positive electrode plate, electrochemical device, and safe coating |
| CN113809332A (en) * | 2021-09-14 | 2021-12-17 | 惠州亿纬锂能股份有限公司 | Composite binder for lithium-sulfur battery positive electrode, lithium-sulfur battery positive electrode and preparation method of composite binder |
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