CN107154517A - The preparation method and its battery of a kind of quick charge polymer Li-ion battery - Google Patents
The preparation method and its battery of a kind of quick charge polymer Li-ion battery Download PDFInfo
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- CN107154517A CN107154517A CN201610123337.0A CN201610123337A CN107154517A CN 107154517 A CN107154517 A CN 107154517A CN 201610123337 A CN201610123337 A CN 201610123337A CN 107154517 A CN107154517 A CN 107154517A
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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
- H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
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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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- 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 method of quick charge polymer Li-ion battery and its battery.By the way that a small amount of anode material nickel cobalt manganic acid lithium of dispersed ultrafine is sanded, and the agent of wire carbon nanotube conducting and spherical conductive nano carbon black are effectively compounded to form honeycomb-like network conductive structure, significantly improve the electric conductivity of positive electrode；The agent of wire carbon nanotube conducting and spherical conductive nano carbon black through dispersed ultrafine is sanded effectively are compounded to form honeycomb-like network conductive structure, significantly improve the electric conductivity of negative material, so as to comprehensive quick charge, the high rate performance for improving battery, the cycle performance and security performance of battery are improved.The quick charge polymer Li-ion battery that the present invention is prepared under higher pole piece surface density, its volume energy density charges 30 minutes in more than 400Wh/L, 1.0C multiplying powers, can be full of more than the 45% of battery capacity, 2.0C multiplying powers charge 30 minutes, can be full of more than the 70% of battery capacity.
Description
Technical field
The invention belongs to technical field of lithium-ion battery, and in particular to a kind of quick charge polymer Li-ion electricity
The preparation method and its battery in pond.
Background technology
Over the past two years, smart mobile phone size of new generation was increasing, the resolution ratio more and more higher of screen, at Mobile solution
Manage device（AP）Arithmetic speed also requires that these changes are required for the lithium battery of more Large Copacity to support increasingly sooner.With battery
Capacity boost, high-power and efficient rapid nitriding turns into required, and existing traditional 5V USB chargers use unification
Using charging inlet Micro-USB, according to the standard of USB associations issue, Micro-USB maximum allowable charging current is
1.8A, it means that traditional 5V USB chargers will be limited by below 9W, it is impossible to lift bigger power output again.
In order to break through this technical bottleneck, the maximum chip for cell phone factory Lian Fake in the whole world and high pass, simultaneously trendy
In chip for cell phone solution, the function of quick charge is imported.Being charged with past charger 100% probably needs 2 ~ 3 hours
See, if high pass, Samsung, Lian Fake and OPPO newest quick charge design are arranged in pairs or groups and change the charger after money, 50% charging is only needed
20 minutes, 100% charging then had an opportunity to force down within 90 minutes.
The research of current quick charge lithium ion battery is concentrated mainly on lithium-ion-power cell class, this kind of battery volume energy
Metric density is often in below 400Wh/L.Because lithium-ion-power cell generally requires higher multiplying power discharging property, therefore battery
Frequently with very low both positive and negative polarity pole piece surface density, thicker copper foil aluminum foil current collector and thicker barrier film and plastic-aluminum packaging film,
And positive electrode frequently with LiFePO4, cobalt nickel lithium manganate ternary material, nickel cobalt lithium aluminate ternary material, negative pole using graphite or
Lithium titanate.
Portable type electronic product for example smart mobile phone, tablet personal computer, portable power source, unmanned plane etc. with high-energy density lithium from
Sub- battery（Battery volume energy density is more than 400Wh/L）On, the related research of quick charge is rarely reported at present.With quick
The development and application of charging high energy density polymer lithium ion battery will be more and more, and its related research and invention are increasingly
Highlight it is important, therefore the present invention be quick charge high energy density polymer lithium ion battery, tool is of great significance.
The content of the invention
The purpose of the present invention aims to provide a kind of preparation method of quick charge polymer Li-ion battery, prepares one kind
Battery volume energy density is more than 400Wh/L quick charge high energy density polymer lithium ion battery, and the battery possesses
1.0C and 2.0C multiplying power quick-charge functions, volume energy density is big, and with high-energy-density, cycle performance is excellent, security
Good the advantages of, can be to meet the high power capacity such as growing smart mobile phone, tablet personal computer, portable power source, unmanned plane, can be fast
The demand of speed charging.The crucial technology of preparing that the present invention is provided simultaneously can be used for quick charge polymer lithium ion power battery
The preparation in pond.
To achieve these goals, the present invention uses following technical scheme：
A kind of preparation method of quick charge polymer Li-ion battery, its preparation method includes the steps：
First, the preparation of positive conductive slurry, anode sizing agent and positive plate
（1）The preparation of positive conductive slurry
Preparation accounts for 2.0%-4.0% high viscositys Kynoar (PVDF), the 0.3%- of whole anode sizing agent solids content
1.0% carbon nanotube conducting agent, 0.5%-1.5% conductive nanos carbon black, 5%-10% anode material nickel cobalt manganic acid lithiums Li
(NixCoyMn1-x-y)O2Material；
2. whole binding agent PVDF is added in 1-METHYLPYRROLIDONE (NMP) solvent in mixer, with rotation
1000-1500 turns/min, and 20-35 turns/min of revolution speed be stirred under vacuum obtaining PVDF binding agent slurries；In binding agent
Whole carbon nanotube conducting agent, conductive nano carbon black and anode material nickel cobalt manganic acid lithium Li are added in slurry
(NixCoyMn1-x-y)O2,/min is turned with rotation 2000-3000 in mixer, 35-45 turns/min of revolution speed carries out vacuum
High-speed stirred obtains the positive conductive agent slurry containing a small amount of nickel-cobalt lithium manganate cathode material；
3. above-mentioned conductive agent slurry is all transferred in the sand mill with zirconium pearl and is ground dispersed ultrafine, rotating speed 1200-
1500 turns/min, zirconium oxide abrasive pearl size is unlatching cooling circulating water cooling in 0.8-1.0mm, process of lapping, obtains ultra-fine
Scattered conductive agent slurry.
（2）The preparation of anode sizing agent
Add the height for accounting for whole anode sizing agent solids content 83.5%-92.2% in two times in the conductive agent slurry of above-mentioned dispersed ultrafine
Cobalt acid lithium is compacted ,/min is turned with rotation 2500-3500 in mixer, 45-55 turns/min of revolution speed carries out vacuum at a high speed
Stirring, is cooled to room temperature, crosses 100-150 eye mesh screens and anode sizing agent is made.
（3）The preparation of positive plate
Above-mentioned anode sizing agent is uniformly coated on plus plate current-collecting body aluminium foil, roll-in is used after dry 8-12 hours through 110-130 DEG C
Machine roll-in is coated with soldering polar ear on the positive pole of positive electrode, positive pole, and positive plate is made.
2nd, the preparation of negative conductive slurry, cathode size and negative plate
（1）The preparation of negative conductive slurry
Preparation accounts for 1.0%-2.0% sodium carboxymethylcelluloses (CMC), the 1.5%- of whole cathode size solids content
2.5% butadiene-styrene rubber (SBR), the agent of 0.3%-0.6% carbon nanotube conductings, 0.5%-1.0% conductive nano carbon blacks；
2. binding agent sodium carboxymethylcellulose (CMC) is added in aqueous solvent in mixer, with rotation in mixer
1000-1500 turns/min, and 30-45 turns/min of revolution speed carries out vacuum high-temperature stirring and obtains CMC binding agent slurries；In bonding
Whole carbon nanotube conducting agent, conductive nano carbon black are added in agent slurry, turned in mixer with rotation 1500-2500/
Min, 30-40 turns/min of revolution speed carry out vacuum high-speed stirred and obtain cathode conductive agent slurry.
3. above-mentioned conductive agent slurry is all transferred in the sand mill with zirconium pearl and is ground dispersed ultrafine, rotating speed
1200-1500 turns/min, and zirconium oxide abrasive pearl size is unlatching cooling circulating water cooling in 0.8-1.0mm, process of lapping, is obtained
The conductive agent slurry of dispersed ultrafine.
（2）The preparation of cathode size
Add the negative material for accounting for whole cathode size solids content 93.9%-96.7% in two times in above-mentioned cathode conductive agent slurry
Delanium ,/min is turned in mixer with rotation 2000-3000, and 45-55 turns/min of revolution speed carries out vacuum high-speed stirring
Mix；Stirring terminates to add whole butadiene-styrene rubber (SBR) binding agents in first 1 hour, and/min is turned with rotation 1000-2000, and revolve round the sun 30-
40 turns/min speed carries out vacuum high-speed stirred, is cooled to room temperature, crosses 150 eye mesh screens and cathode size is made.
（3）The preparation of negative plate
Above-mentioned cathode size is uniformly coated on negative current collector copper foil, roll squeezer is used after dry 8-12 hours through 75-85 DEG C
Roll-in is coated with the negative pole of negative material, negative pole and is welded with lug, and negative plate is made.
3rd, barrier film uses thickness for 12-16 microns of polyethylene separators, positive plate/barrier film/negative plate interval warp
Auto reeling is into battery core；Battery core is sealed through laminated aluminum film at 175-200 DEG C, then through vacuum bakeout, fluid injection, heat-sealing
Seal, shelve, preliminary filling, Vacuum Package, chemical conversion, the obtained quick charge polymer Li-ion battery such as partial volume.
As preferred, the molecular weight of binding agent Kynoar (PVDF) is more than 950,000 in step one.
It is used as preferred, step one（3）The one side surface density of middle positive plate coating is more than 185g/m2Between.
It is used as preferred, step 2（3）The one side surface density of middle negative plate coating is more than 80g/m2Between.
A kind of quick charge polymer Li-ion battery, includes above-mentioned preparation method and above-mentioned 3 preferred feature parameters.
The beneficial effects of the invention are as follows：
（1）A small amount of anode material nickel cobalt manganic acid lithium of dispersed ultrafine is sanded through sand mill, its size is by the two of original micron-scale
Secondary particle becomes the primary particle of nano-scale, and carbon nanotube conducting agent with wire and spherical conductive nano carbon black have
Effect is compound, is coated together in positive electrode high-pressure solid lithium cobalt particle surface and constitutes honeycomb-like network conductive structure, so that pole
The earth improves the electric conductivity of positive electrode；The wire carbon nanotube conducting agent of dispersed ultrafine and spherical nanometer is sanded through sand mill
Conductive black is effectively combined and constitutes honeycomb-like network conductive structure, so as to significantly improve the electric conductivity of negative material, and just
Comprehensive function improves the quick charge of battery, high rate performance together for pole, also improves the cycle performance and security performance of battery.
（2）The quick charge polymer Li-ion battery prepared under higher positive/negative plate surface density, its volume energy
Density charges 30 minutes in more than 400Wh/L, 1.0C multiplying powers, and more than 45%, the 2.0C multiplying powers that can be full of battery capacity charge 30 points
Clock, can be full of more than the 70% of battery capacity.
Brief description of the drawings
Fig. 1 is polymer prepared by quick charge polymer Li-ion battery and comparative example 1 prepared by the embodiment of the present invention 2
Lithium ion battery 2C chargings 1C, which discharges 300 times, circulates correlation curves.
Embodiment
To make those skilled in the art more fully understand the present invention program, the present invention is made with reference to embodiment
It is described in further detail.
Embodiment 1：
The preparation of the present embodiment quick charge polymer Li-ion battery specifically comprises the following steps：
First, the preparation of positive conductive slurry, anode sizing agent and positive plate
（1）The preparation of positive conductive slurry
Preparation accounts for 4.0% high viscosity Kynoar (PVDF), 1.0% CNT of whole anode sizing agent solids content
Conductive agent, 1.5% conductive nano carbon black, 10% anode material nickel cobalt manganic acid lithium LiNi0.5Co0.2Mn0.3O2Material；
2. whole binding agent PVDF is added in 1-METHYLPYRROLIDONE (NMP) solvent in mixer, with rotation 1500
Turn/min, 35 turns/min of revolution speed be stirred under vacuum obtaining PVDF binding agent slurries；Added in binding agent slurry complete
Carbon nanotube conducting agent, conductive nano carbon black and the anode material nickel cobalt manganic acid lithium LiNi in portion0.5Co0.2Mn0.3O2, in mixer
In with 3000 turns/min of rotation, 45 turns/min of revolution speed carries out vacuum high-speed stirred and obtained containing a small amount of nickle cobalt lithium manganate just
The positive conductive agent slurry of pole material；
3. above-mentioned conductive agent slurry is all transferred in the sand mill with zirconium pearl and is ground dispersed ultrafine, 1500 turns of rotating speed/
Min, zirconium oxide abrasive pearl size is unlatching cooling circulating water cooling in 0.8mm, process of lapping, obtains the conductive agent of dispersed ultrafine
Slurry.
（2）The preparation of anode sizing agent
Add the high-pressure solid cobalt for accounting for whole anode sizing agent solids content 83.5% in two times in the conductive agent slurry of above-mentioned dispersed ultrafine
Sour lithium, with 3500 turns/min of rotation in mixer, 55 turns/min of revolution speed carries out vacuum high-speed stirred, is cooled to room
Temperature, crosses 100 eye mesh screens and anode sizing agent is made.
（3）The preparation of positive plate
Above-mentioned anode sizing agent is uniformly coated on plus plate current-collecting body aluminium foil, roll-in is used after dry 8-12 hours through 110-130 DEG C
Machine roll-in is coated with soldering polar ear on the positive pole of positive electrode, positive pole, and positive plate is made.
2nd, the preparation of negative conductive slurry, cathode size and negative plate
（1）The preparation of negative conductive slurry
Preparation accounts for 2.0% sodium carboxymethylcellulose (CMC), 2.5% butadiene-styrene rubber of whole cathode size solids content
(SBR), 0.6% carbon nanotube conducting agent, 1.0% conductive nano carbon black；
2. binding agent sodium carboxymethylcellulose (CMC) is added in aqueous solvent in mixer, with rotation in mixer
1500 turns/min, 40 turns/min of revolution speed carries out vacuum high-temperature stirring and obtains CMC binding agent slurries；In binding agent slurry
Whole carbon nanotube conducting agent, conductive nano carbon black are added, with 2500 turns/min of rotation in mixer, revolve round the sun 40 turns/min
Speed carry out vacuum high-speed stirred obtain cathode conductive agent slurry.
3. above-mentioned conductive agent slurry is all transferred in the sand mill with zirconium pearl and is ground dispersed ultrafine, rotating speed
1200 turns/min, zirconium oxide abrasive pearl size is unlatching cooling circulating water cooling in 1.0mm, process of lapping, obtains dispersed ultrafine
Conductive agent slurry.
（2）The preparation of cathode size
Add the negative material artificial stone for accounting for whole cathode size solids content 93.9% in two times in above-mentioned cathode conductive agent slurry
Ink, with 3000 turns/min of rotation in mixer, 55 turns/min of revolution speed carries out vacuum high-speed stirred；Stirring terminates preceding 1
Hour adds whole butadiene-styrene rubber (SBR) binding agents, with 2000 turns/min of rotation, and 40 turns/min of revolution speed carries out vacuum
High-speed stirred, is cooled to room temperature, crosses 150 eye mesh screens and cathode size is made.
（3）The preparation of negative plate
Above-mentioned cathode size is uniformly coated on negative current collector copper foil, roll squeezer is used after dry 8-12 hours through 75-85 DEG C
Roll-in is coated with the negative pole of negative material, negative pole and is welded with lug, and negative plate is made.
3rd, barrier film uses thickness for 16 microns of polyethylene separators, and positive plate/barrier film/negative plate interval is passed through certainly
It is dynamic to be wound into battery core；Battery core is sealed through laminated aluminum film at 175-200 DEG C, then is sealed through vacuum bakeout, fluid injection, heat-sealing
Mouthful, shelve, preliminary filling, Vacuum Package, chemical conversion, the obtained quick charge polymer Li-ion battery such as partial volume.
Embodiment 2：
The preparation of the present embodiment quick charge polymer Li-ion battery specifically comprises the following steps：
First, the preparation of positive conductive slurry, anode sizing agent and positive plate
（1）The preparation of positive conductive slurry
Preparation accounts for 2.0% high viscosity Kynoar (PVDF), 0.3% CNT of whole anode sizing agent solids content
Conductive agent, 0.5% conductive nano carbon black, 5% anode material nickel cobalt manganic acid lithium LiNi0.3Co0.3Mn0.3O2Material；
2. whole binding agent PVDF is added in 1-METHYLPYRROLIDONE (NMP) solvent in mixer, with rotation 1000
Turn/min, 25 turns/min of revolution speed be stirred under vacuum obtaining PVDF binding agent slurries；Added in binding agent slurry complete
Carbon nanotube conducting agent, conductive nano carbon black and the anode material nickel cobalt manganic acid lithium LiNi in portion0.3Co0.3Mn0.3O2, in mixer
In with 2000 turns/min of rotation, 35 turns/min of revolution speed carries out vacuum high-speed stirred and obtained containing a small amount of nickle cobalt lithium manganate just
The positive conductive agent slurry of pole material；
3. above-mentioned conductive agent slurry is all transferred in the sand mill with zirconium pearl and is ground dispersed ultrafine, 1300 turns of rotating speed/
Min, zirconium oxide abrasive pearl size is unlatching cooling circulating water cooling in 0.9mm, process of lapping, obtains the conductive agent of dispersed ultrafine
Slurry.
（2）The preparation of anode sizing agent
Add the high-pressure solid cobalt for accounting for whole anode sizing agent solids content 92.2% in two times in the conductive agent slurry of above-mentioned dispersed ultrafine
Sour lithium, with 2500 turns/min of rotation in mixer, 45 turns/min of revolution speed carries out vacuum high-speed stirred, is cooled to room
Temperature, crosses 150 eye mesh screens and anode sizing agent is made.
（3）The preparation of positive plate
Above-mentioned anode sizing agent is uniformly coated on plus plate current-collecting body aluminium foil, roll-in is used after dry 8-12 hours through 110-130 DEG C
Machine roll-in is coated with soldering polar ear on the positive pole of positive electrode, positive pole, and positive plate is made.
2nd, the preparation of negative conductive slurry, cathode size and negative plate
（1）The preparation of negative conductive slurry
Preparation accounts for 1.0% sodium carboxymethylcellulose (CMC), 1.5% butadiene-styrene rubber of whole cathode size solids content
(SBR), 0.3% carbon nanotube conducting agent, 0.5% conductive nano carbon black；
2. binding agent sodium carboxymethylcellulose (CMC) is added in aqueous solvent in mixer, with rotation in mixer
1000 turns/min, 30 turns/min of revolution speed carries out vacuum high-temperature stirring and obtains CMC binding agent slurries；In binding agent slurry
Whole carbon nanotube conducting agent, conductive nano carbon black are added, with 1500 turns/min of rotation in mixer, revolve round the sun 30 turns/min
Speed carry out vacuum high-speed stirred obtain cathode conductive agent slurry.
3. above-mentioned conductive agent slurry is all transferred in the sand mill with zirconium pearl and is ground dispersed ultrafine, rotating speed
1300 turns/min, zirconium oxide abrasive pearl size is unlatching cooling circulating water cooling in 0.9mm, process of lapping, obtains dispersed ultrafine
Conductive agent slurry.
（2）The preparation of cathode size
Add the negative material artificial stone for accounting for whole cathode size solids content 96.7% in two times in above-mentioned cathode conductive agent slurry
Ink, with 2000 turns/min of rotation in mixer, 45 turns/min of revolution speed carries out vacuum high-speed stirred；Stirring terminates preceding 1
Hour adds whole butadiene-styrene rubber (SBR) binding agents, with 1000 turns/min of rotation, and 30 turns/min of revolution speed carries out vacuum
High-speed stirred, is cooled to room temperature, crosses 150 eye mesh screens and cathode size is made.
（3）The preparation of negative plate
Above-mentioned cathode size is uniformly coated on negative current collector copper foil, roll squeezer is used after dry 8-12 hours through 75-85 DEG C
Roll-in is coated with the negative pole of negative material, negative pole and is welded with lug, and negative plate is made.
3rd, barrier film uses thickness for 12 microns of polyethylene separators, and positive plate/barrier film/negative plate interval is passed through certainly
It is dynamic to be wound into battery core；Battery core is sealed through laminated aluminum film at 175-200 DEG C, then is sealed through vacuum bakeout, fluid injection, heat-sealing
Mouthful, shelve, preliminary filling, Vacuum Package, chemical conversion, the obtained quick charge polymer Li-ion battery such as partial volume.
Embodiment 3：
The preparation of the present embodiment quick charge polymer Li-ion battery specifically comprises the following steps：
First, the preparation of positive conductive slurry, anode sizing agent and positive plate
（1）The preparation of positive conductive slurry
Preparation accounts for 3.0% high viscosity Kynoar (PVDF), 0.7% CNT of whole anode sizing agent solids content
Conductive agent, 1.0% conductive nano carbon black, 8% anode material nickel cobalt manganic acid lithium LiNi0.4Co0.2Mn0.4O2Material；
2. whole binding agent PVDF is added in 1-METHYLPYRROLIDONE (NMP) solvent in mixer, with rotation 1200
Turn/min, 30 turns/min of revolution speed be stirred under vacuum obtaining PVDF binding agent slurries；Added in binding agent slurry complete
Carbon nanotube conducting agent, conductive nano carbon black and the anode material nickel cobalt manganic acid lithium LiNi in portion0.4Co0.2Mn0.4O2, in mixer
In with 2500 turns/min of rotation, 40 turns/min of revolution speed carries out vacuum high-speed stirred and obtained containing a small amount of nickle cobalt lithium manganate just
The positive conductive agent slurry of pole material；
3. above-mentioned conductive agent slurry is all transferred in the sand mill with zirconium pearl and is ground dispersed ultrafine, 1200 turns of rotating speed/
Min, zirconium oxide abrasive pearl size is unlatching cooling circulating water cooling in 1.0mm, process of lapping, obtains the conductive agent of dispersed ultrafine
Slurry.
（2）The preparation of anode sizing agent
Add the high-pressure solid cobalt for accounting for whole anode sizing agent solids content 87.3% in two times in the conductive agent slurry of above-mentioned dispersed ultrafine
Sour lithium, with 3000 turns/min of rotation in mixer, 50 turns/min of revolution speed carries out vacuum high-speed stirred, is cooled to room
Temperature, crosses 100 eye mesh screens and anode sizing agent is made.
（3）The preparation of positive plate
Above-mentioned anode sizing agent is uniformly coated on plus plate current-collecting body aluminium foil, roll-in is used after dry 8-12 hours through 110-130 DEG C
Machine roll-in is coated with soldering polar ear on the positive pole of positive electrode, positive pole, and positive plate is made.
2nd, the preparation of negative conductive slurry, cathode size and negative plate
（1）The preparation of negative conductive slurry
Preparation accounts for 1.5% sodium carboxymethylcellulose (CMC), 2.0% butadiene-styrene rubber of whole cathode size solids content
(SBR), 0.5% carbon nanotube conducting agent, 0.8% conductive nano carbon black；
2. binding agent sodium carboxymethylcellulose (CMC) is added in aqueous solvent in mixer, with rotation in mixer
1200 turns/min, 35 turns/min of revolution speed carries out vacuum high-temperature stirring and obtains CMC binding agent slurries；In binding agent slurry
Whole carbon nanotube conducting agent, conductive nano carbon black are added, with 2000 turns/min of rotation in mixer, revolve round the sun 35 turns/min
Speed carry out vacuum high-speed stirred obtain cathode conductive agent slurry.
3. above-mentioned conductive agent slurry is all transferred in the sand mill with zirconium pearl and is ground dispersed ultrafine, rotating speed
1500 turns/min, zirconium oxide abrasive pearl size is unlatching cooling circulating water cooling in 0.8mm, process of lapping, obtains dispersed ultrafine
Conductive agent slurry.
（2）The preparation of cathode size
Add the negative material artificial stone for accounting for whole cathode size solids content 95.2% in two times in above-mentioned cathode conductive agent slurry
Ink, with 2500 turns/min of rotation in mixer, 50 turns/min of revolution speed carries out vacuum high-speed stirred；Stirring terminates preceding 1
Hour adds whole butadiene-styrene rubber (SBR) binding agents, with 1500 turns/min of rotation, and 35 turns/min of revolution speed carries out vacuum
High-speed stirred, is cooled to room temperature, crosses 150 eye mesh screens and cathode size is made.
（3）The preparation of negative plate
Above-mentioned cathode size is uniformly coated on negative current collector copper foil, roll squeezer is used after dry 8-12 hours through 75-85 DEG C
Roll-in is coated with the negative pole of negative material, negative pole and is welded with lug, and negative plate is made.
3rd, barrier film uses thickness for 12 microns of polyethylene separators, and positive plate/barrier film/negative plate interval is passed through certainly
It is dynamic to be wound into battery core；Battery core is sealed through laminated aluminum film at 175-200 DEG C, then is sealed through vacuum bakeout, fluid injection, heat-sealing
Mouthful, shelve, preliminary filling, Vacuum Package, chemical conversion, the obtained quick charge polymer Li-ion battery such as partial volume.
Comparative example 1：
The preparation of this comparative example polymer Li-ion battery specifically comprises the following steps：
First, the preparation of positive conductive slurry, anode sizing agent and positive plate
（1）The preparation of positive conductive slurry
Preparation accounts for 4.0% high viscosity Kynoar (PVDF), 2.0% conductive nano of whole anode sizing agent solids content
Carbon black material；
2. whole binding agent PVDF is added in 1-METHYLPYRROLIDONE (NMP) solvent in mixer, with rotation 1500
Turn/min, 30 turns/min of revolution speed be stirred under vacuum obtaining PVDF binding agent slurries；Added in binding agent slurry complete
The conductive nano carbon black in portion, with 2500 turns/min of rotation in mixer, 35 turns/min of revolution speed carries out vacuum high-speed stirring
Mix and obtain positive conductive agent slurry；
（2）The preparation of anode sizing agent
Add the high-pressure solid lithium cobalt for accounting for whole anode sizing agent solids content 94.0% in two times in above-mentioned conductive agent slurry, stirring
Mix with 3000 turns/min of rotation in machine, 50 turns/min of revolution speed carries out vacuum high-speed stirred, is cooled to room temperature, crosses 100
Anode sizing agent is made in screen cloth.
（3）The preparation of positive plate
Above-mentioned anode sizing agent is uniformly coated on plus plate current-collecting body aluminium foil, roll-in is used after dry 8-12 hours through 110-130 DEG C
Machine roll-in is coated with soldering polar ear on the positive pole of positive electrode, positive pole, and positive plate is made.
2nd, the preparation of negative conductive slurry, cathode size and negative plate
（1）The preparation of negative conductive slurry
Preparation accounts for 1.7% sodium carboxymethylcellulose (CMC), 2.3% butadiene-styrene rubber of whole cathode size solids content
(SBR), 1.0% conductive nano carbon black；
2. binding agent sodium carboxymethylcellulose (CMC) is added in aqueous solvent in mixer, with rotation in mixer
1500 turns/min, 40 turns/min of revolution speed carries out vacuum high-temperature stirring and obtains CMC binding agent slurries；In binding agent slurry
Whole conductive nano carbon blacks are added, with 2000 turns/min of rotation in mixer, 35 turns/min of revolution speed carries out vacuum
High-speed stirred obtains cathode conductive agent slurry.
（2）The preparation of cathode size
Add the negative material artificial stone for accounting for whole cathode size solids content 95.0% in two times in above-mentioned cathode conductive agent slurry
Ink, with 2500 turns/min of rotation in mixer, 50 turns/min of revolution speed carries out vacuum high-speed stirred；Stirring terminates preceding 1
Hour adds whole butadiene-styrene rubber (SBR) binding agents, with 1500 turns/min of rotation, and 35 turns/min of revolution speed carries out vacuum
High-speed stirred, is cooled to room temperature, crosses 150 eye mesh screens and cathode size is made.
（3）The preparation of negative plate
Above-mentioned cathode size is uniformly coated on negative current collector copper foil, roll squeezer is used after dry 8-12 hours through 75-85 DEG C
Roll-in is coated with the negative pole of negative material, negative pole and is welded with lug, and negative plate is made.
3rd, barrier film uses thickness for 16 microns of polyethylene separators, and positive plate/barrier film/negative plate interval is passed through certainly
It is dynamic to be wound into battery core；Battery core is sealed through laminated aluminum film at 175-200 DEG C, then is sealed through vacuum bakeout, fluid injection, heat-sealing
Mouthful, shelve, preliminary filling, Vacuum Package, chemical conversion, the obtained quick charge polymer Li-ion battery such as partial volume.
Table 1 is the performance comparison of polymer Li-ion battery prepared by each embodiment and comparative example.
Table 1：The performance of polymer Li-ion battery prepared by each embodiment and comparative example
Table 1 and Fig. 1 show that the quick charge polymer Li-ion that the present invention is prepared under higher positive/negative plate surface density is electric
Pond, its volume energy density charges 30 minutes in more than 400Wh/L, 1.0C multiplying powers, can be full of more than the 45% of battery capacity,
2.0C multiplying powers charge 30 minutes, can be full of more than the 70% of battery capacity, and with good cycle performance.
The invention provides a kind of preparation method of quick charge polymer Li-ion battery, it is sanded by sand mill ultra-fine
Scattered a small amount of anode material nickel cobalt manganic acid lithium, its size is become the one of nano-scale by the second particle of original micron-scale
Secondary particle, and carbon nanotube conducting agent with wire and spherical conductive nano carbon black be effectively combined, it is high in positive electrode together
Compacting cobalt acid lithium particle surface coats and constitutes honeycomb-like network conductive structure, so as to significantly improve the electric conductivity of positive electrode
Energy；The wire carbon nanotube conducting agent of dispersed ultrafine is sanded through sand mill and spherical conductive nano carbon black is effectively combined and constitutes honeycomb
Shape network conduction structure, so as to significantly improve the electric conductivity of negative material, comprehensive function improves battery together with positive pole
Quick charge, high rate performance, also improve battery cycle performance and security performance.It should be appreciated that the foregoing is only
The preferred embodiments of the present invention, e insufficient to limit technical scheme, for those of ordinary skills, at this
Within the spirit and principle of invention, it can according to the above description be increased and decreased, replaced, converted or be improved, and all these increases and decreases,
Technical scheme after replacing, convert or improving, should all belong to the scope of the technology of the present invention feature, be included in the protection of the present invention
Within the scope of.
Claims (13)
1. a kind of preparation method of quick charge polymer Li-ion battery, it is characterised in that described preparation method is included such as
Under step：First, the preparation of positive conductive slurry, anode sizing agent and positive plate；2nd, negative conductive slurry, cathode size and negative
The preparation of pole piece：3rd, barrier film uses thickness for 12-16 microns of polyethylene separators, between positive plate/barrier film/negative plate
Every through auto reeling into battery core；Battery core is sealed through laminated aluminum film at 175-200 DEG C, then through vacuum bakeout, fluid injection,
Seal, shelve, preliminary filling, Vacuum Package, chemical conversion, the obtained quick charge polymer Li-ion battery such as partial volume.
2. the preparation of positive conductive slurry according to claim 1, it is characterised in that described preparation process includes：①
2.0%-4.0% high viscositys Kynoar (PVDF), the 0.3%-1.0% carbon for preparing to account for whole anode sizing agent solids content are received
Mitron conductive agent, 0.5%-1.5% conductive nanos carbon black, 5%-10% anode material nickel cobalt manganic acid lithium Li (NixCoyMn1-x-y)O2
Material；2. whole binding agent PVDF is added in 1-METHYLPYRROLIDONE (NMP) solvent in mixer, with rotation
1000-1500 turns/min, and 20-35 turns/min of revolution speed be stirred under vacuum obtaining PVDF binding agent slurries；In binding agent
Whole carbon nanotube conducting agent, conductive nano carbon black and anode material nickel cobalt manganic acid lithium Li are added in slurry
(NixCoyMn1-x-y)O2,/min is turned with rotation 2000-3000 in mixer, 35-45 turns/min of revolution speed carries out vacuum
High-speed stirred obtains the positive conductive agent slurry containing a small amount of nickel-cobalt lithium manganate cathode material；3. it is above-mentioned conductive agent slurry is complete
Portion, which is transferred in the sand mill with zirconium pearl, is ground dispersed ultrafine, and rotating speed 1200-1500 turns/min, zirconium oxide abrasive pearl size
Cooling circulating water cooling is opened for 0.8-1.0mm, in process of lapping, the conductive agent slurry of dispersed ultrafine is obtained.
3. the preparation of anode sizing agent according to claim 1, it is characterised in that in the conductive agent slurry of above-mentioned dispersed ultrafine
The high-pressure solid lithium cobalt for accounting for whole anode sizing agent solids content 83.5%-92.2% is added in two times, with rotation in mixer
2500-3500 turns/min, and 45-55 turns/min of revolution speed carries out vacuum high-speed stirred, is cooled to room temperature, crosses 100-150
Anode sizing agent is made in eye mesh screen.
4. the preparation of positive plate according to claim 1, it is characterised in that above-mentioned anode sizing agent is uniformly coated on positive pole
In current collector aluminum foil, the positive pole for being coated with positive electrode after dry 8-12 hours with roll squeezer roll-in through 110-130 DEG C, on positive pole
Soldering polar ear, is made positive plate.
5. the preparation of negative conductive slurry according to claim 1, it is characterised in that described preparation process includes：It is negative
1. preparation accounts for 1.0%-2.0% sodium carboxymethylcelluloses (CMC), the 1.5%-2.5% fourths of whole cathode size solids content
Benzene rubber (SBR), the agent of 0.3%-0.6% carbon nanotube conductings, 0.5%-1.0% conductive nano carbon blacks；2. in mixer
Binding agent sodium carboxymethylcellulose (CMC) is added in aqueous solvent ,/min is turned with rotation 1000-1500 in mixer, it is public
The speed progress vacuum high-temperature stirring for turning 30-45 turns/min obtains CMC binding agent slurries；Whole is added in binding agent slurry
Carbon nanotube conducting agent, conductive nano carbon black ,/min is turned in mixer with rotation 1500-2500,30-40 turns/min's of revolution
Speed carries out vacuum high-speed stirred and obtains cathode conductive agent slurry.
6. the preparation of negative conductive slurry according to claim 5, it is characterised in that also including step：By above-mentioned conductive agent
Slurry, which is all transferred in the sand mill with zirconium pearl, is ground dispersed ultrafine, and rotating speed 1200-1500 turns/min, zirconium oxide abrasive
Pearl size is unlatching cooling circulating water cooling in 0.8-1.0mm, process of lapping, obtains the conductive agent slurry of dispersed ultrafine.
7. the preparation of cathode size according to claim 1, it is characterised in that in above-mentioned cathode conductive agent slurry in two times
The negative material Delanium for accounting for whole cathode size solids content 93.9%-96.7% is added, with rotation 2000- in mixer
3000 turns/min, 45-55 turns/min of revolution speed carries out vacuum high-speed stirred；Stirring terminates to add whole fourths in first 1 hour
Benzene rubber (SBR) binding agent ,/min is turned with rotation 1000-2000, and 30-40 turns/min of revolution speed carries out vacuum high-speed stirring
Mix, be cooled to room temperature, cross 150 eye mesh screens and cathode size is made.
8. the preparation of negative plate according to claim 1, it is characterised in that above-mentioned cathode size is uniformly coated on negative pole
On copper foil of affluxion body, the negative pole for being coated with negative material after dry 8-12 hours with roll squeezer roll-in through 75-85 DEG C is welded on negative pole
Lug is connected to, negative plate is made.
9. a kind of preparation method of quick charge polymer Li-ion battery according to claim 1, it is characterised in that institute
The molecular weight of binding agent Kynoar (PVDF) is more than 950,000 in the step of stating one.
10. a kind of preparation method of quick charge polymer Li-ion battery according to claim 1, it is characterised in that
Described step one（3）The one side surface density of middle positive plate coating is more than 185g/m2Between.
11. a kind of preparation method of quick charge polymer Li-ion battery according to claim 1, it is characterised in that
Described step two（3）The one side surface density of middle negative plate coating is more than 80g/m2Between.
12. a kind of quick charge polymer Li-ion battery, it is characterised in that described polymer Li-ion battery includes right
It is required that 1-8 preparation method and claim 9-11 characteristic parameter.
13. quick charge polymer Li-ion battery according to claim 12, it is characterised in that described polymer lithium
Ion battery volume energy density charges 30 minutes in more than 400Wh/L, 1.0C multiplying powers, can be full of more than the 45% of battery capacity,
2.0C multiplying powers charge 30 minutes, can be full of more than the 70% of battery capacity.
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| CN112670458A (en) * | 2019-10-16 | 2021-04-16 | 中国科学院福建物质结构研究所 | Preparation method and application of silicon-carbon material |
| CN114023969A (en) * | 2021-11-03 | 2022-02-08 | 合肥国轩高科动力能源有限公司 | 3D creeper-type high-performance conductive agent and preparation method and application thereof |
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| CN114023969A (en) * | 2021-11-03 | 2022-02-08 | 合肥国轩高科动力能源有限公司 | 3D creeper-type high-performance conductive agent and preparation method and application thereof |
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