CN108054425A - A kind of preparation method of new high magnification ternary nickel cobalt aluminum electrokinetic cell - Google Patents
A kind of preparation method of new high magnification ternary nickel cobalt aluminum electrokinetic cell Download PDFInfo
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- CN108054425A CN108054425A CN201711299556.5A CN201711299556A CN108054425A CN 108054425 A CN108054425 A CN 108054425A CN 201711299556 A CN201711299556 A CN 201711299556A CN 108054425 A CN108054425 A CN 108054425A
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- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/485—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy
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Abstract
The invention discloses a kind of preparation methods of new high magnification ternary nickel cobalt aluminum electrokinetic cell, belong to field of new energy technologies.Battery includes positive electrode active materials and negative electrode active material, wherein, positive electrode active materials include the component of following parts by weight：90 95 parts of ternary nickel cobalt aluminum material, 34 parts of positive conductive agent, 35 parts of Kynoar；Negative electrode active material includes the component of following parts by weight：90 94 parts of Delanium, 24 parts of aqueous binders, 12 parts of carbon black, 24 parts of butadiene-styrene rubber.The present invention positive electrode active materials that by Multistep feeding and repeatedly the modes such as stirring obtain, it is different from other battery materials, have the characteristics that material is finer and smoother, performance is superior, simultaneously, negative electrode active material is merely not only being simply mixed for bonding agent and conductive agent, but viscosity is adjusted by adding in deionized water, so that negative electrode active material can be preferably bonded with positive electrode active materials, be conducive to battery charging and discharging.
Description
Technical field
The invention belongs to field of new energy technologies, and in particular to a kind of system of new high magnification ternary nickel cobalt aluminum electrokinetic cell
Preparation Method.
Background technology
21 century will enter hybrid electric vehicle (HEV), the epoch of electric car (EV).In existing new-energy automobile power electric
Chi Zhong, lithium ion battery production cost is relatively low, and recharge can carry the energy using very convenient, compared to other to be had more
High cost advantage.Therefore, this kind of battery becomes electrical source of power most popular at present, and global lithium ion battery market is kept
Continuous positive value increases, and continuous growth trend is also presented in power lithium-ion battery demand.
In recent years, lithium ion battery industry in China's was (including battery, positive and negative pole material, membrane, electrolyte and special equipment
Deng) new highlight continuously emerges in industrial pattern and New technical use, lithium ion battery and critical material yield are also in steady growth.Mesh
The lithium ion power battery cathode material of preceding volume production includes cobalt acid lithium (LiCoO2), LiFePO4 (LiFePO4), LiMn2O4
(LiMn2O4) and ternary material (nickle cobalt lithium manganate and nickel cobalt lithium aluminate) product.
Most of battery of new-energy automobile uses LiFePO 4 material at present, and energy has been shown in Demonstration And Extension
Density bottleneck, this greatly hinders continual mileage, and the gram volume of LiFePO 4 material is small, and operating voltage is low (with respect to graphite-like
Cathode).
For the shortcomings of current new energy car battery comprehensive performance is poor, cruising ability is weak, publication number 106784812A leads to
Crossing the preparation method of improvement ferric phosphate lithium cell makes battery possess the advantages of being used under quick charge, low temperature.However LiFePO4
The gram volume of battery, operating voltage can not still be promoted.
The content of the invention
In view of the above problems, the present invention provides the new high magnification ternary that a kind of gram volume is big, operating voltage is high
Nickel cobalt aluminum electrokinetic cell.
To achieve these goals, the present invention uses following technical scheme：
A kind of new high magnification ternary nickel cobalt aluminum electrokinetic cell, the battery include positive electrode active materials and negative electrode active material
Material, wherein, the positive electrode active materials include the component of following parts by weight：90-95 parts of ternary nickel cobalt aluminum material, positive conductive
3-4 parts of agent, 3-5 parts of Kynoar；Negative electrode active material includes the component of following parts by weight：90-94 parts of Delanium, water
2-4 parts of binding agent of property, 1-2 parts of carbon black, 2-4 parts of butadiene-styrene rubber.
Preferably, in ternary nickel cobalt aluminum material each component molar ratio nickel：Cobalt：Aluminium is 15-25：5:1；Positive conductive
Agent includes the component of following parts by weight：45-55 parts of graphene, 16-24 parts of carbon black, 16-24 parts of bulky grain graphite powder, multi wall carbon
8-12 parts of nanotube.
Preferably, aqueous binders described in negative electrode active material are sodium carboxymethylcellulose, carbon black is negative conductive
Agent.
Positive electrode active materials provided by the invention by using the ultra-fine nickel cobalt aluminum material of grain size≤150nm, adopt by conductive agent
With the combination of carbon nanotubes, graphene and the super carbon blacks of Ke Qin, surface and the anode of positive electrode active materials particle are uniformly distributed in
In the gap that active material particle is formed, active material particle is connected to well, good road is provided for the transmission of lithium ion
Footpath reduces the resistance in its diffusion process, adds the conductive capability of positive electrode active materials at low temperature.
And negative electrode active material provided by the invention is equal using layer structure, interplanar distance, electrical conductivity and ion diffusion rates
More outstanding high magnification Delanium, can improve electrical conductivity and ion diffusion rates, reduce the impedance of lithium ion mobility.
A kind of preparation method of new high magnification ternary nickel cobalt aluminum electrokinetic cell, described method includes following steps：
(1) prepared by positive electrode active materials：Ternary nickel cobalt aluminum material, positive conductive agent are added in dry-mixed mixer, into
Row stirs for the first time, adds part anode glue, carries out second and stirs, and then adds in remaining anode glue, carries out the 3rd
It is secondary to stir to obtain positive electrode active materials；
(2) prepared by negative electrode active material：Aqueous binders and deionized water are added in mixer and carry out decentralized processing,
Add powdered graphite and carry out stirring and scraper for the first time, then add in cathode conductive agent, carry out second after stirring plus go from
Sub- water adjusts viscosity and obtains negative electrode active material；
(3) pole piece makes：The positive electrode active materials prepared and negative electrode active material are respectively coated on plus plate current-collecting body
And on negative current collector, baking, rod pressure obtain positive plate and negative plate after cutting；
(4) battery assembles：Capsule after positive plate, membrane and negative plate are assembled with lamination process, and inject electrolyte and obtain
High magnification ternary nickel cobalt aluminum electrokinetic cell.
Existing power battery energy density is relatively low, has seriously affected the course continuation mileage of electric vehicle, high magnification nickel ternary
Cobalt aluminum material conducts electricity very well in itself, and lithium ion diffusion velocity is fast, has very excellent cryogenic property.The present invention passes through substep
It feeds and the multiple positive electrode active materials that obtain of the modes such as stirring, is different from other battery materials, with material is finer and smoother, performance
Superior feature, meanwhile, negative electrode active material is merely not only being simply mixed for bonding agent and conductive agent, but passes through addition
Deionized water adjusts viscosity, so that negative electrode active material can be preferably bonded with positive electrode active materials, is conducive to battery and fills
Electric discharge.
Preferably, anode glue is by oiliness binding agent Kynoar and oil-based solvent N- methyl described in step (1)
Pyrrolidones forms, and is uniformly dispersed and is made after agitated machine mixing 2-3h, and the anode glue added in after stirring for the first time
Account for the 30-60% of all anode glues.Anode glue can promote the associativity between the material being added portionwise in anode, and will just
Pole glue is added portionwise, can be so that glue is preferably penetrated into the gap of various composition materials.
Preferably, the frequency of mixer is set for revolution 35-40Hz, rotation when being stirred for the first time described in step (1)
6000-8000rpm, mixing time 0.5-2h；The frequency of mixer is set during second of stirring for revolution 40-45Hz, rotation
4000-5000rpm, mixing time 10-30min；The frequency of mixer is set when third time stirs for revolution 40-45Hz, from
Turn 4000-5000rpm, mixing time 2-3h.Each constituent of positive electrode is added in batches, can cause each ingredient more
Refinement is close, the grain size smaller of particulate matter, the mixability higher of dispersion.
Preferably, the decentralized processing time described in step (2) is 0.5-1.5h, first time mixing time is 10-
30min, second of mixing time are 0.5-1.5h, viscosity 500-2000mPas.It adjusts viscosity and is conducive to negative electrode active material
It can be preferably bonded with positive electrode active materials, be conducive to battery charging and discharging.
Preferably, electrolyte is specially described in step (4)：Lithium hexafluoro phosphate/ethyl cellulose, diethyl carbonate,
The volume ratio of dimethyl carbonate is 1:1:1.The present invention is using high magnification functionality low-temperature electrolyte, by choosing low melting point, low
Viscosity, high-k, and have the low temperature cosolvent compared with high electrochemical stability, the ratio of each solvent component is adjusted, improves electricity
Solve the electrical conductivity of liquid at low temperature.
Compared with prior art, the invention has the advantages that：
(1) at present lithium iron phosphate dynamic battery than ability for 130Wh/kg or so, the ratio energy of ternary nickel cobalt aluminum electrokinetic cell
Amount can accomplish more than 170Wh/kg, breach the low bottleneck of power battery energy density.
(2) cycle performance of high magnification ternary nickel cobalt aluminum electrokinetic cell is more preferable, and after 500 Xun Huans, capacity retention ratio exists
More than 90%.
(3) high magnification ternary nickel cobalt aluminum electrokinetic cell solves the problems, such as new energy electric motor vehicle quick charge, it can be achieved that 15 points
Clock is rapidly filled with target, greatly shortens the new energy electric motor vehicle charging time, and cruising ability greatly increases, and realizes New energy electric
Vehicle large-scale application.
(4) compared with the prior art, the nickel cobalt aluminum electrokinetic cell prepared by the present invention has high-energy density and fabulous
Cryogenic property.
Specific embodiment
It is specific embodiments of the present invention below, technical scheme is further described, but the present invention is simultaneously
It is not limited to these embodiments.
Embodiment 1
Dispensing：Prepare raw material by the active material and its parts by weight of above-mentioned battery, positive electrode active materials include following weight
Measure the component of number：93 parts of ternary nickel cobalt aluminum material, 3.5 parts of positive conductive agent, 4 parts of Kynoar, wherein, positive conductive agent
Include the component of following parts by weight：50 parts of graphene, 20 parts of carbon black, 20 parts of bulky grain graphite powder, 10 parts of multi-walled carbon nanotube；
Negative electrode active material includes the component of following parts by weight：92 parts of Delanium, 3 parts of aqueous binders, 1.5 parts of carbon black, butylbenzene
3 parts of rubber, wherein, aqueous binders are sodium carboxymethylcellulose, and carbon black is cathode conductive agent.
It is prepared by positive electrode active materials：After Kynoar and the agitated machine of N-Methyl pyrrolidone first are mixed 2.5h
It is uniformly dispersed and anode glue is made, then ternary nickel cobalt aluminum material, positive conductive agent are added in dry-mixed mixer, carry out first
Secondary stirring sets the frequency of mixer as revolution 38Hz, rotation 7000rpm, mixing time 1.3h；Add 45% anode
Glue carries out second and stirs, and sets the frequency of mixer as revolution 43Hz, rotation 4500rpm, mixing time 20min；It scrapes
Then material adds in remaining anode glue, carries out third time stirring, set the frequency of mixer as revolution 43Hz, rotation
4500rpm, mixing time 2.5h, adjusting viscosity are 7000mPas, stir de-bubble, vacuumize, and mixer does not open rotation, sets
Positive electrode active materials are obtained after revolution 18Hz.
It is prepared by negative electrode active material：Aqueous binders and deionized water are added to progress decentralized processing 1h in mixer,
It adds powdered graphite and carries out stirring 20min, and scraper for the first time, then add in cathode conductive agent, carry out second of stirring 1h
Afterwards plus deionized water adjusts viscosity and obtains negative electrode active material to 1300mPas.
Pole piece makes：The positive electrode active materials prepared and negative electrode active material are respectively coated on plus plate current-collecting body and are born
On the collector of pole, baking, rod pressure obtain positive plate and negative plate after cutting.
Battery assembles：By lithium hexafluoro phosphate/ethyl cellulose, diethyl carbonate, dimethyl carbonate with volume ratio 1:1:1 system
Into electrolyte, capsule after positive plate, membrane and negative plate are assembled with lamination process, and inject electrolyte and obtain high magnification nickel ternary
Cobalt aluminum electrokinetic cell.
Embodiment 2
Dispensing：Prepare raw material by the active material and its parts by weight of above-mentioned battery, positive electrode active materials include following weight
Measure the component of number：90 parts of ternary nickel cobalt aluminum material, 3 parts of positive conductive agent, 3 parts of Kynoar, wherein, positive conductive agent bag
Include the component of following parts by weight：45 parts of graphene, 16 parts of carbon black, 16 parts of bulky grain graphite powder, 8 parts of multi-walled carbon nanotube；It is negative
Pole active material includes the component of following parts by weight：90 parts of Delanium, 2 parts of aqueous binders, 1 part of carbon black, butadiene-styrene rubber 2
Part, wherein, aqueous binders are sodium carboxymethylcellulose, and carbon black is cathode conductive agent.
It is prepared by positive electrode active materials：After Kynoar and the agitated machine of N-Methyl pyrrolidone first are mixed 2.5h
It is uniformly dispersed and anode glue is made, then ternary nickel cobalt aluminum material, positive conductive agent are added in dry-mixed mixer, carry out first
Secondary stirring sets the frequency of mixer as revolution 38Hz, rotation 7000rpm, mixing time 1.3h；Add 45% anode
Glue carries out second and stirs, and sets the frequency of mixer as revolution 43Hz, rotation 4500rpm, mixing time 20min；It scrapes
Then material adds in remaining anode glue, carries out third time stirring, set the frequency of mixer as revolution 43Hz, rotation
4500rpm, mixing time 2.5h, adjusting viscosity are 7000mPas, stir de-bubble, vacuumize, and mixer does not open rotation, sets
Positive electrode active materials are obtained after revolution 18Hz.
It is prepared by negative electrode active material：Aqueous binders and deionized water are added to progress decentralized processing 1h in mixer,
It adds powdered graphite and carries out stirring 20min, and scraper for the first time, then add in cathode conductive agent, carry out second of stirring 1h
Afterwards plus deionized water adjusts viscosity and obtains negative electrode active material to 1300mPas.
Pole piece makes：The positive electrode active materials prepared and negative electrode active material are respectively coated on plus plate current-collecting body and are born
On the collector of pole, baking, rod pressure obtain positive plate and negative plate after cutting.
Battery assembles：By lithium hexafluoro phosphate/ethyl cellulose, diethyl carbonate, dimethyl carbonate with volume ratio 1:1:1 system
Into electrolyte, capsule after positive plate, membrane and negative plate are assembled with lamination process, and inject electrolyte and obtain high magnification nickel ternary
Cobalt aluminum electrokinetic cell.
Embodiment 3
Dispensing：Prepare raw material by the active material and its parts by weight of above-mentioned battery, positive electrode active materials include following weight
Measure the component of number：95 parts of ternary nickel cobalt aluminum material, 4 parts of positive conductive agent, 5 parts of Kynoar, wherein, positive conductive agent bag
Include the component of following parts by weight：55 parts of graphene, 24 parts of carbon black, 24 parts of bulky grain graphite powder, 12 parts of multi-walled carbon nanotube；It is negative
Pole active material includes the component of following parts by weight：94 parts of Delanium, 4 parts of aqueous binders, 2 parts of carbon black, butadiene-styrene rubber 4
Part, wherein, aqueous binders are sodium carboxymethylcellulose, and carbon black is cathode conductive agent.
It is prepared by positive electrode active materials：After Kynoar and the agitated machine of N-Methyl pyrrolidone first are mixed 2.5h
It is uniformly dispersed and anode glue is made, then ternary nickel cobalt aluminum material, positive conductive agent are added in dry-mixed mixer, carry out first
Secondary stirring sets the frequency of mixer as revolution 38Hz, rotation 7000rpm, mixing time 1.3h；Add 45% anode
Glue carries out second and stirs, and sets the frequency of mixer as revolution 43Hz, rotation 4500rpm, mixing time 20min；It scrapes
Then material adds in remaining anode glue, carries out third time stirring, set the frequency of mixer as revolution 43Hz, rotation
4500rpm, mixing time 2.5h, adjusting viscosity are 7000mPas, stir de-bubble, vacuumize, and mixer does not open rotation, sets
Positive electrode active materials are obtained after revolution 18Hz.
It is prepared by negative electrode active material：Aqueous binders and deionized water are added to progress decentralized processing 1h in mixer,
It adds powdered graphite and carries out stirring 20min, and scraper for the first time, then add in cathode conductive agent, carry out second of stirring 1h
Afterwards plus deionized water adjusts viscosity and obtains negative electrode active material to 1300mPas.
Pole piece makes：The positive electrode active materials prepared and negative electrode active material are respectively coated on plus plate current-collecting body and are born
On the collector of pole, baking, rod pressure obtain positive plate and negative plate after cutting.
Battery assembles：By lithium hexafluoro phosphate/ethyl cellulose, diethyl carbonate, dimethyl carbonate with volume ratio 1:1:1 system
Into electrolyte, capsule after positive plate, membrane and negative plate are assembled with lamination process, and inject electrolyte and obtain high magnification nickel ternary
Cobalt aluminum electrokinetic cell.
Embodiment 4
Dispensing：Prepare raw material by the active material and its parts by weight of above-mentioned battery, positive electrode active materials include following weight
Measure the component of number：93 parts of ternary nickel cobalt aluminum material, 3.5 parts of positive conductive agent, 4 parts of Kynoar, wherein, positive conductive agent
Include the component of following parts by weight：50 parts of graphene, 20 parts of carbon black, 20 parts of bulky grain graphite powder, 10 parts of multi-walled carbon nanotube；
Negative electrode active material includes the component of following parts by weight：92 parts of Delanium, 3 parts of aqueous binders, 1.5 parts of carbon black, butylbenzene
3 parts of rubber, wherein, aqueous binders are sodium carboxymethylcellulose, and carbon black is cathode conductive agent.
It is prepared by positive electrode active materials：Divide after Kynoar and the agitated machine of N-Methyl pyrrolidone first are mixed 2h
It dissipates and anode glue uniformly is made, then ternary nickel cobalt aluminum material, positive conductive agent are added in dry-mixed mixer, carry out for the first time
Stirring sets the frequency of mixer as revolution 35Hz, rotation 6000rpm, mixing time 0.5h；Add 30% anode glue
Liquid carries out second and stirs, and sets the frequency of mixer as revolution 40Hz, rotation 4000rpm, mixing time 10min；It scrapes
Then material adds in remaining anode glue, carries out third time stirring, set the frequency of mixer as revolution 40Hz, rotation
4000rpm, mixing time 2h, adjusting viscosity are 4000mPas, stir de-bubble, vacuumize, and mixer does not open rotation, are set public
Positive electrode active materials are obtained after turning 15Hz.
It is prepared by negative electrode active material：Aqueous binders and deionized water are added to progress decentralized processing 1h in mixer,
It adds powdered graphite and carries out stirring 20min, and scraper for the first time, then add in cathode conductive agent, carry out second of stirring 1h
Afterwards plus deionized water adjusts viscosity and obtains negative electrode active material to 1300mPas.
Pole piece makes：The positive electrode active materials prepared and negative electrode active material are respectively coated on plus plate current-collecting body and are born
On the collector of pole, baking, rod pressure obtain positive plate and negative plate after cutting.
Battery assembles：By lithium hexafluoro phosphate/ethyl cellulose, diethyl carbonate, dimethyl carbonate with volume ratio 1:1:1 system
Into electrolyte, capsule after positive plate, membrane and negative plate are assembled with lamination process, and inject electrolyte and obtain high magnification nickel ternary
Cobalt aluminum electrokinetic cell.
Embodiment 5
Dispensing：Prepare raw material by the active material and its parts by weight of above-mentioned battery, positive electrode active materials include following weight
Measure the component of number：93 parts of ternary nickel cobalt aluminum material, 3.5 parts of positive conductive agent, 4 parts of Kynoar, wherein, positive conductive agent
Include the component of following parts by weight：50 parts of graphene, 20 parts of carbon black, 20 parts of bulky grain graphite powder, 10 parts of multi-walled carbon nanotube；
Negative electrode active material includes the component of following parts by weight：92 parts of Delanium, 3 parts of aqueous binders, 1.5 parts of carbon black, butylbenzene
3 parts of rubber, wherein, aqueous binders are sodium carboxymethylcellulose, and carbon black is cathode conductive agent.
It is prepared by positive electrode active materials：Divide after Kynoar and the agitated machine of N-Methyl pyrrolidone first are mixed 3h
It dissipates and anode glue uniformly is made, then ternary nickel cobalt aluminum material, positive conductive agent are added in dry-mixed mixer, carry out for the first time
Stirring sets the frequency of mixer as revolution 40Hz, rotation 8000rpm, mixing time 2h；Add 60% anode glue
Liquid carries out second and stirs, and sets the frequency of mixer as revolution 45Hz, rotation 5000rpm, mixing time 30min；It scrapes
Then material adds in remaining anode glue, carries out third time stirring, set the frequency of mixer as revolution 45Hz, rotation
5000rpm, mixing time 3h, adjusting viscosity are 10000mPas, stir de-bubble, vacuumize, and mixer does not open rotation, sets
Positive electrode active materials are obtained after revolution 20Hz.
It is prepared by negative electrode active material：Aqueous binders and deionized water are added to progress decentralized processing 1h in mixer,
It adds powdered graphite and carries out stirring 20min, and scraper for the first time, then add in cathode conductive agent, carry out second of stirring 1h
Afterwards plus deionized water adjusts viscosity and obtains negative electrode active material to 1300mPas.
Pole piece makes：The positive electrode active materials prepared and negative electrode active material are respectively coated on plus plate current-collecting body and are born
On the collector of pole, baking, rod pressure obtain positive plate and negative plate after cutting.
Battery assembles：By lithium hexafluoro phosphate/ethyl cellulose, diethyl carbonate, dimethyl carbonate with volume ratio 1:1:1 system
Into electrolyte, capsule after positive plate, membrane and negative plate are assembled with lamination process, and inject electrolyte and obtain high magnification nickel ternary
Cobalt aluminum electrokinetic cell.
Embodiment 6
Dispensing：Prepare raw material by the active material and its parts by weight of above-mentioned battery, positive electrode active materials include following weight
Measure the component of number：93 parts of ternary nickel cobalt aluminum material, 3.5 parts of positive conductive agent, 4 parts of Kynoar, wherein, positive conductive agent
Include the component of following parts by weight：50 parts of graphene, 20 parts of carbon black, 20 parts of bulky grain graphite powder, 10 parts of multi-walled carbon nanotube；
Negative electrode active material includes the component of following parts by weight：92 parts of Delanium, 3 parts of aqueous binders, 1.5 parts of carbon black, butylbenzene
3 parts of rubber, wherein, aqueous binders are sodium carboxymethylcellulose, and carbon black is cathode conductive agent.
It is prepared by positive electrode active materials：After Kynoar and the agitated machine of N-Methyl pyrrolidone first are mixed 2.5h
It is uniformly dispersed and anode glue is made, then ternary nickel cobalt aluminum material, positive conductive agent are added in dry-mixed mixer, carry out first
Secondary stirring sets the frequency of mixer as revolution 38Hz, rotation 7000rpm, mixing time 1.3h；Add 45% anode
Glue carries out second and stirs, and sets the frequency of mixer as revolution 43Hz, rotation 4500rpm, mixing time 20min；It scrapes
Then material adds in remaining anode glue, carries out third time stirring, set the frequency of mixer as revolution 43Hz, rotation
4500rpm, mixing time 2.5h, adjusting viscosity are 7000mPas, stir de-bubble, vacuumize, and mixer does not open rotation, sets
Positive electrode active materials are obtained after revolution 18Hz.
It is prepared by negative electrode active material：Aqueous binders and deionized water are added in mixer and carry out decentralized processing
0.5h adds powdered graphite and carries out stirring 10min, and scraper for the first time, then adds in cathode conductive agent, stirred for the second time
It mixes after 0.5h plus deionized water adjusts viscosity and obtains negative electrode active material to 500mPas.
Pole piece makes：The positive electrode active materials prepared and negative electrode active material are respectively coated on plus plate current-collecting body and are born
On the collector of pole, baking, rod pressure obtain positive plate and negative plate after cutting.
Battery assembles：By lithium hexafluoro phosphate/ethyl cellulose, diethyl carbonate, dimethyl carbonate with volume ratio 1:1:1 system
Into electrolyte, capsule after positive plate, membrane and negative plate are assembled with lamination process, and inject electrolyte and obtain high magnification nickel ternary
Cobalt aluminum electrokinetic cell.
Embodiment 7
Dispensing：Prepare raw material by the active material and its parts by weight of above-mentioned battery, positive electrode active materials include following weight
Measure the component of number：93 parts of ternary nickel cobalt aluminum material, 3.5 parts of positive conductive agent, 4 parts of Kynoar, wherein, positive conductive agent
Include the component of following parts by weight：50 parts of graphene, 20 parts of carbon black, 20 parts of bulky grain graphite powder, 10 parts of multi-walled carbon nanotube；
Negative electrode active material includes the component of following parts by weight：92 parts of Delanium, 3 parts of aqueous binders, 1.5 parts of carbon black, butylbenzene
3 parts of rubber, wherein, aqueous binders are sodium carboxymethylcellulose, and carbon black is cathode conductive agent.
It is prepared by positive electrode active materials：After Kynoar and the agitated machine of N-Methyl pyrrolidone first are mixed 2.5h
It is uniformly dispersed and anode glue is made, then ternary nickel cobalt aluminum material, positive conductive agent are added in dry-mixed mixer, carry out first
Secondary stirring sets the frequency of mixer as revolution 38Hz, rotation 7000rpm, mixing time 1.3h；Add 45% anode
Glue carries out second and stirs, and sets the frequency of mixer as revolution 43Hz, rotation 4500rpm, mixing time 20min；It scrapes
Then material adds in remaining anode glue, carries out third time stirring, set the frequency of mixer as revolution 43Hz, rotation
4500rpm, mixing time 2.5h, adjusting viscosity are 7000mPas, stir de-bubble, vacuumize, and mixer does not open rotation, sets
Positive electrode active materials are obtained after revolution 18Hz.
It is prepared by negative electrode active material：Aqueous binders and deionized water are added in mixer and carry out decentralized processing
1.5h adds powdered graphite and carries out stirring 30min, and scraper for the first time, then adds in cathode conductive agent, stirred for the second time
It mixes after 1.5h plus deionized water adjusts viscosity and obtains negative electrode active material to 2000mPas.
Pole piece makes：The positive electrode active materials prepared and negative electrode active material are respectively coated on plus plate current-collecting body and are born
On the collector of pole, baking, rod pressure obtain positive plate and negative plate after cutting.
Battery assembles：By lithium hexafluoro phosphate/ethyl cellulose, diethyl carbonate, dimethyl carbonate with volume ratio 1:1:1 system
Into electrolyte, capsule after positive plate, membrane and negative plate are assembled with lamination process, and inject electrolyte and obtain high magnification nickel ternary
Cobalt aluminum electrokinetic cell.
Comparative example 1
With differing only in for embodiment 1, the anode main material of comparative example 1 is LiFePO 4 material.
Comparative example 2
With differing only in for embodiment 1,2 positive electrode active materials of comparative example directly mix all positive electrodes when preparing
Once stir.
Comparative example 3
With differing only in for embodiment 1,3 negative electrode active material of comparative example directly mixes all negative materials when preparing
Once stir.
The product of embodiment 1-7 and comparative example 1-3 are tested, test its gram volume, operating voltage, than energy, knot
Fruit is as shown in table 1：
Table 1：The performance of product in embodiment 1-7 and comparative example 1-3
From table from the point of view of data, most of batteries using LiFePO 4 material have shown energy in Demonstration And Extension
Metric density bottleneck, this greatly hinders continual mileage.And nickel cobalt lithium aluminate ternary material is used for lithium-ion-power cell so that
The mass energy density and volume energy density of battery system are greatly improved.The high power characteristic of battery pack is good, especially
Suitable for pure electric vehicle or plug-in hybrid-power automobile.
It is skilled to this field although having been made a detailed description to the present invention and being cited some specific embodiments
For technical staff, as long as it is obvious that can make various changes or correct without departing from the spirit and scope of the present invention.
Claims (8)
1. a kind of new high magnification ternary nickel cobalt aluminum electrokinetic cell, which is characterized in that the battery include positive electrode active materials and
Negative electrode active material, wherein, the positive electrode active materials include the component of following parts by weight：Ternary nickel cobalt aluminum material 90-95
Part, 3-4 parts of positive conductive agent, 3-5 parts of Kynoar；Negative electrode active material includes the component of following parts by weight：Artificial stone
90-94 parts black, 2-4 parts of aqueous binders, 1-2 parts of carbon black, 2-4 parts of butadiene-styrene rubber.
A kind of 2. new high magnification ternary nickel cobalt aluminum electrokinetic cell according to claim 1, which is characterized in that positive conductive
Agent includes the component of following parts by weight：45-55 parts of graphene, 16-24 parts of carbon black, 16-24 parts of bulky grain graphite powder, multi wall carbon
8-12 parts of nanotube.
3. a kind of new high magnification ternary nickel cobalt aluminum electrokinetic cell according to claim 1, which is characterized in that described aqueous
Binding agent is sodium carboxymethylcellulose, and carbon black is cathode conductive agent.
4. a kind of preparation method of new high magnification ternary nickel cobalt aluminum electrokinetic cell, which is characterized in that the described method includes as follows
Step：
(1) prepared by positive electrode active materials：Ternary nickel cobalt aluminum material, positive conductive agent are added in dry-mixed mixer, carry out the
It once stirs, adds part anode glue, carry out second and stir, then add in remaining anode glue, carry out third time and stir
Mix to obtain positive electrode active materials；
(2) prepared by negative electrode active material：Aqueous binders and deionized water are added in mixer and carry out decentralized processing, then are added
Enter powdered graphite to carry out stirring simultaneously scraper for the first time, then add in cathode conductive agent, carry out second adding deionized water after stirring
It adjusts viscosity and obtains negative electrode active material；
(3) pole piece makes：The positive electrode active materials prepared and negative electrode active material are respectively coated on plus plate current-collecting body and are born
On the collector of pole, baking, rod pressure obtain positive plate and negative plate after cutting；
(4) battery assembles：Capsule after positive plate, membrane and negative plate are assembled with lamination process, and inject electrolyte and obtain high power
Rate ternary nickel cobalt aluminum electrokinetic cell.
5. a kind of preparation method of new high magnification ternary nickel cobalt aluminum electrokinetic cell according to claim 4, feature exist
In anode glue is made of binding agent Kynoar and oil-based solvent N-Methyl pyrrolidone described in step (1), agitated
It is uniformly dispersed and is made after machine mixing 2-3h, and the anode glue added in after stirring for the first time accounts for the 30- of all anode glues
60%.
6. a kind of preparation method of new high magnification ternary nickel cobalt aluminum electrokinetic cell according to claim 4, feature exist
In the frequency of mixer is set when being stirred for the first time described in step (1), and for the 35-40Hz that revolves round the sun, rotation 6000-8000rpm is stirred
The time is mixed as 0.5-2h；Second of frequency that mixer is set when stirring is revolution 40-45Hz, and rotation 4000-5000rpm is stirred
The time is mixed as 10-30min；The frequency of mixer is set when third time stirs for revolution 40-45Hz, rotation 4000-5000rpm,
Mixing time is 2-3h.
7. a kind of preparation method of new high magnification ternary nickel cobalt aluminum electrokinetic cell according to claim 4, feature exist
In the decentralized processing time described in step (2) is 0.5-1.5h, and the time of stirring is 10-30min for the first time, secondary to stir
The time is mixed as 0.5-1.5h, viscosity 500-2000mPas.
8. a kind of preparation method of new high magnification ternary nickel cobalt aluminum electrokinetic cell according to claim 4, feature exist
In electrolyte is specially described in step (4)：Lithium hexafluoro phosphate/ethyl cellulose, diethyl carbonate, the body of dimethyl carbonate
Product is than being 1:1:1.
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