A kind of equipment continuously preparing ternary material
Technical field
The utility model belongs to anode material for lithium-ion batteries technical field, more particularly to one kind continuously prepares ternary material
Equipment.
Background technique
Lithium ion battery is widely used in the fields such as electronic communication equipment, electric car.With the continuous development of technology,
Requirement of the people to lithium ion battery energy density, stability etc. is also higher and higher.Weight of the positive electrode as lithium ion battery
Component part is wanted, performance directly determines the performance of lithium ion battery, and the height of cost also directly affects lithium ion battery
Price.Common commercial li-ion cell positive material has cobalt acid lithium, LiMn2O4, ternary material (NCM, NCA) and ferric phosphate
Lithium etc..Wherein ternary material has taken into account the advantages of nickel, cobalt, manganese (or nickel, cobalt, aluminium) three kinds of materials, energy density with higher
With preferable cycle performance, and the cobalt material of higher cost is replaced with cheap nickel manganese, has combined cost advantage.
In numerous ternary material preparation methods, coprecipitation is mainstream industrial at present in conjunction with high temperature solid-state method
Method.It is ternary precursor manufacturing enterprise first using the obtained ternary precursor dry powder of coprecipitation, followed by ternary material is raw
Produce enterprise by lithium source and presoma by metering than direct ball milling mixing, first preheating at low temperature, then high-temperature calcination after grinding
Ternary material powder product is made.The method is dry powder due to application, and is completely dependent on mechanical mixture, raw material mixing uniformity
Difference, the consistency and stability of prepared ternary material are poor.
Currently, industrial coprecipitation, which prepares ternary precursor mostly, to be carried out in reaction kettle, due to reaction kettle sheet
Body to be stirred mode intensity not high, material will reach uniformly mixing and take a long time, but ternary precursor is coprecipitated
Form sediment reaction speed but quickly so that the particle identity of reaction product is poor.Especially up to ten a few houres in reaction and
In ageing process, it is also necessary to which lasting stirring and heat preservation, energy consumption of reaction are big.Ternary precursor after ageing needs washing, mistake again
Filter and drying, could be made final dry powder.And multiple washing can inevitably generate a large amount of discharge of wastewater, it is dry
Process will necessarily also generate the reunion and a large amount of energy consumption of particle.
To sum up, there is long flow paths, controllable for ternary material preparation process of the coprecipitation in conjunction with high temperature solid-state method
Property is poor, energy consumption is high, pollution is big and the problems such as prepared ternary material consistency and stability difference.
In view of this, the utility model is intended to provide a kind of device and method for continuously preparing ternary material, can increase
The controllability of strong coprecipitation reaction, shortens manufacturing cycle, reduces energy consumption and discharge of wastewater, realizes batch continuous production, is suitable for
The practical application of industrially prepared ternary material.In addition, scale parameter of the utility model by adjusting nickel cobalt manganese, can get difference
The ternary material of type, to meet different application demands.
Utility model content
One of the purpose of this utility model is: in view of the deficiencies of the prior art, and providing a kind of continuous preparation ternary material
The equipment of material can enhance the controllability of coprecipitation reaction, shorten manufacturing cycle, reduce energy consumption and discharge of wastewater, realize and criticize
Measure continuous production, the practical application suitable for industrially prepared ternary material.In addition, ratio of the utility model by adjusting nickel cobalt manganese
Example parameter, can get different types of ternary material, to meet different application demands.
In order to achieve the above object, the utility model adopts the following technical solution:
A kind of equipment continuously preparing ternary material, jet pipe type reactor, ultrasound including passing sequentially through pipeline connection
Aging tank, predrying equipment, wet stirring ball mill, secondary tympanic membrane formula plate and frame filter press, is beaten the first eardrum formula plate and frame filter press
Pulp grinder, sand mill, material-handling pump, spray drying tower and atmosphere sintering furnace, the jet pipe type reactor are connected with salt-mixture
Solution reservoir and coprecipitator storage tank.
A kind of improvement of the equipment of ternary material, the jet pipe type reactor and institute are continuously prepared as the utility model
It states and is provided with the first constant flow pump between mixing salt solution storage tank, between the jet pipe type reactor and the coprecipitator storage tank
It is provided with the second constant flow pump.
A kind of improvement of the equipment of ternary material is continuously prepared as the utility model, is set in the jet pipe type reactor
It is equipped with spiral channel, the channel is placed in Vltrasonic device, material impingement mix in jet pipe type reactor, and in spiral shell
It revolves and is sufficiently reacted in the channel of shape.
A kind of improvement of the equipment of ternary material, the mixing salt solution storage tank and institute are continuously prepared as the utility model
It states and is provided with heating device and temperature regulating device in coprecipitator storage tank, the jet pipe type reactor is provided with insulation construction.
A kind of improvement of the equipment of ternary material is continuously prepared as the utility model, the ultrasonic aging pond is totally-enclosed
Aging tank.
A kind of improvement of the equipment of ternary material is continuously prepared as the utility model, the predrying equipment is also connected with
Waste gas recovering device.
Another purpose of the utility model is continuously to prepare ternary lithium using consersion unit described in the utility model
The method of electric material includes at least following steps:
Nickel salt, cobalt salt, L salt are added in solvent and are uniformly mixed in proportion by the first step, obtain the mixed of 1mol/L~4mol/L
Salting liquid is closed, the L salt is manganese salt or aluminium salt, which is added in mixing salt solution storage tank;It mixes in proportion
The ammonium hydroxide of the NaOH and 1mol/L~4mol/L of 1mol/L~4mol/L obtain coprecipitator solution, and coprecipitator storage tank is added
In;
Solution in mixing salt solution storage tank and coprecipitator storage tank is heated to 50~60 DEG C, to jet pipe by second step
It is fed in formula reactor, so that the pH value of mixed slurry is 10~11;
Third step, material after quick hybrid reaction, enter from discharge port into ultrasonic aging pond in jet pipe type reactor,
The ageing duration is 2~8h;
The slurry that ageing is completed is separated by solid-liquid separation by the 4th step, the first eardrum formula plate and frame filter press, obtained filter cake
In 100~120 DEG C of dry 3-10h in predrying equipment, it is dry after material using wet stirring ball mill be added pure water into
Row pulverization process;
The smashed slurry of wet stirring ball mill is carried out washing and solid-liquid by the 5th step, secondary tympanic membrane formula plate and frame filter press
Separation;
6th step, the filter cake that the 5th step is obtained are added in beater, while pure water and lithium salts are added, then break into 15~
The slurry of 30wt% solid content, and it is sent into 4~16h of sanded treatment in sand mill;
Slurry after sand milling is delivered to spray drying tower and carries out mist projection granulating, spray drying by the 7th step, material-handling pump
The inlet temperature of tower is 100~200 DEG C, and outlet temperature is 100~200 DEG C.
8th step carries out calcination processing to the powder that mist projection granulating obtains in atmosphere sintering furnace, first under oxygen atmosphere
5~10h of pre-burning at 400~600 DEG C, then 700~900 DEG C of 10~20h of calcining, obtain ternary material after furnace cooling.
As a kind of improvement of the utility model method, mixing salt solution and coprecipitator solution pass through the essence of constant flow pump
Really metering, is fed with constant feed ratio into jet pipe type reactor.
As a kind of improvement of the utility model method, the volume ratio of NaOH and ammonium hydroxide is (0.1-10): 1.
As a kind of improvement of the utility model method, the nickel salt is nickel nitrate, nickel acetate, at least one in nickel oxalate
Kind, the cobalt salt is at least one of cobalt nitrate, cobalt acetate, cobalt oxalate, and the manganese salt is manganese nitrate, manganese acetate, manganese oxalate
At least one of, the aluminium salt is at least one of aluminum nitrate, aluminum acetate, oxalic acid aluminium, and the lithium source is lithium hydroxide, carbon
At least one of sour lithium, lithium oxalate, solvent described in the first step are water.
Compared with the existing technology, the utility model at least has the following beneficial effects:
First, storage tank, reactor and aging tank pass through pipeline between each other and connect, and effectively preventing ammonium hydroxide volatilization influences pH
Value, and purified air and working condition.Particularly, it is controlled by the control of accurate temperature and feed rate, strict guarantee
The proportion of reaction mass and the stabilization of pH value make coprecipitation reaction more evenly, more rapidly, more completely, the ternary forerunner of preparation
Body product stability and consistency are more preferable.
Second, technical solutions of the utility model use jet pipe type reactor, by the impinging jet hybrid reaction of material,
And it is further sufficiently mixed reaction in subsequent ultrasonic helical duct, and it highly shortened the reaction time, it can rapidly, continuously
Ternary precursor is prepared, process controllability is strong, is easy to amplify production.
Third, the totally-enclosed ultrasonic aging slot that the utility model uses, the one side effective guarantee pH value of ageing process
Stability;Another party's ultrasonic wave, which also has, to be promoted crystallization process, prevents a variety of effects such as particle agglomeration and spheroidized particle pattern, energy
It is enough greatly to shorten digestion time, prepare the ternary precursor that sphericity is more preferable, finer and close and more uniform size.
4th, in technical solutions of the utility model, the material after ripening is separated by solid-liquid separation through eardrum formula plate and frame filter press
Afterwards, it is not required to wash, directly enters and be dried in predrying furnace, and recycle the NH to volatilize in drying process3It recycles.Predry
Ternary precursor after dry is stripped of the moisture and ammonium hydroxide of the overwhelming majority, and volume greatly reduces, and significantly reduces washing difficulty,
The discharge amount of washes is greatly reduced simultaneously, and there is environmental benefit outstanding.More importantly consolidating for spraying slurry is contained
Amount has been increased to 15% or more.Ternary precursor slurry compared to no pre-burning, solid content less than 8%, energy-saving effect are significant.
5th, in technical solutions of the utility model, the ternary precursor filter cake that washing, filters pressing obtain directly is beaten with lithium salts
Slurry has obtained the mixed uniformly high solids content slurry under smaller scale after being sanded, and good fluidity is made through mist projection granulating
Spheric granules, then ternary material can directly be made through calcining.To eliminate the drying of ternary precursor in production and forge
The pulverizing process of ternary material, reduces energy consumption after burning.In addition, the ball milling mixing mode relative to dry powder, the utility model skill
Art scheme is directly beaten using ternary precursor filter cake with lithium salts, is sanded and mix, and the mixing used time is shorter, more efficient, also more equal
It is even, it can be effectively reduced the temperature and time of calcining, energy-saving effect is significant.
6th, metering ratio of the technical solutions of the utility model using accurate constant flow pump control material, the metering ratio of nickel cobalt manganese
Control is accurate, and the flow by simply regulating and controlling constant flow pump can easily change the metering ratio of nickel cobalt manganese, is suitable for a variety of
The preparation of the ternary material of proportion.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model.
Fig. 2 is the XRD diagram of the resulting ternary material of embodiment 1 in the utility model.
Fig. 3 is the cycle performance curve graph of the resulting ternary material of embodiment 1 in the utility model.
Fig. 4 is the XRD diagram of the resulting ternary material of embodiment 2 in the utility model.
Fig. 5 is the cycle performance curve graph of the resulting ternary material of embodiment 2 in the utility model.
Specific embodiment
The utility model and its advantages are described in detail With reference to embodiment, but the utility model
Embodiment it is without being limited thereto.
Embodiment 1
As shown in Figure 1, present embodiments providing a kind of equipment for continuously preparing ternary material, including pass sequentially through pipeline company
Jet pipe type reactor 1, ultrasonic aging pond 2, the first eardrum formula plate and frame filter press 3, predrying equipment 4, the wet process stirring ball connect
Grinding machine 5, secondary tympanic membrane formula plate and frame filter press 6, beater 7, sand mill 8, material-handling pump 9, spray drying tower 10 and atmosphere are burnt
Freezing of a furnace 11, jet pipe type reactor 1 are connected with mixing salt solution storage tank 12 and coprecipitator storage tank 13.
Wherein, the first constant flow pump 14, jet pipe type are provided between jet pipe type reactor 1 and mixing salt solution storage tank 12
The second constant flow pump 15 is provided between reactor 1 and coprecipitator storage tank 13.
Spiral channel 16 is provided in jet pipe type reactor 1, channel 16 is placed in Vltrasonic device, and material is in jet stream
Impingement mix in tubular reactor 1, and sufficiently reacted in spiral channel 16.
Heating device and temperature regulating device, jet pipe type are provided in mixing salt solution storage tank 12 and coprecipitator storage tank 13
Reactor 1 is provided with insulation construction.The temperature of mixing salt solution storage tank 12 and coprecipitator storage tank 13 and jet pipe type reactor 1
Controlling precision is ± 0.5~± 5 DEG C, and the temperature and mixing salt solution storage tank 12 and coprecipitator in jet pipe type reactor 1 are stored up
Tank 13 is consistent, and so that material is entered temperature when jet pipe type reactor 1 reacts and is not changed.
Ultrasonic aging pond 2 is totally enclosed aging tank.
Predrying equipment 4 is also connected with waste gas recovering device.
The method for continuously preparing ternary lithium electric material using the consersion unit includes at least following steps:
Nickel oxalate, cobalt oxalate, manganese oxalate are added to the water uniformly mixed, acquisition by the molar ratio of 6:2:2 by the first step
The mixing salt solution is added in mixing salt solution storage tank 12 mixing salt solution of 2mol/L;It is mixed by the volume ratio of 1:2
The ammonium hydroxide of the NaOH and 2mol/L of 2mol/L obtain coprecipitator solution, are added in coprecipitator storage tank 13;
Solution in mixing salt solution storage tank and coprecipitator storage tank is heated to 55 DEG C by second step, anti-to jet pipe type
It answers in device and feeds, so that the pH value of mixed slurry is 10;
Third step, material after quick hybrid reaction, enter from discharge port into ultrasonic aging pond in jet pipe type reactor,
The ageing duration is 5h;
The slurry that ageing is completed is separated by solid-liquid separation by the 4th step, the first eardrum formula plate and frame filter press, obtained filter cake
Material in predrying equipment after 110 DEG C of dry 6h, drying is added pure water using wet stirring ball mill and carries out at crushing
Reason;
The smashed slurry of wet stirring ball mill is carried out washing and solid-liquid by the 5th step, secondary tympanic membrane formula plate and frame filter press
Separation;
6th step, the filter cake that the 5th step is obtained is added in beater, while pure water and lithium salts is added, and then breaks into
The slurry of 20wt% solid content, and it is sent into sanded treatment 8h in sand mill;
Slurry after sand milling is delivered to spray drying tower and carries out mist projection granulating, spray drying by the 7th step, material-handling pump
The inlet temperature of tower is 200 DEG C, and outlet temperature is 100 DEG C.
8th step carries out calcination processing to the powder that mist projection granulating obtains in atmosphere sintering furnace, first under oxygen atmosphere
The pre-burning 6h at 500 DEG C, then 850 DEG C of calcining 15h, obtain ternary material after furnace cooling.
Using X-ray diffraction (XRD) spectrogram of the preparation-obtained material of above method as shown in Fig. 2, passing through crystal
C/a value and I003/I104Value semi-quantitatively describes mixing degree cationic in the integrality and crystal of ternary material structural development.
The ternary material c/a value and I of above method preparation003/I104Value is respectively 4.96 and 2.39, it is believed that the ternary material knot of preparation
Structure physically well develops, and cationic mixing is less.By inductively coupled plasma body (ICP) test result it is found that prepared by above method
In ternary material, nickel, cobalt, three kinds of elements of manganese content than be about 1.00:1.07:3.25, it is very close with Theoretical Design ratio.
Fig. 3 is the ternary material that is prepared using above method as battery made of positive electrode, is surveyed under 0.1C multiplying power
The cycle performance curve obtained, specific discharge capacity is about 205mAh/g in the circulation of preceding 50 circle, shows higher electric discharge ratio
Capacity and preferable electrochemistry cycle performance.
Embodiment 2
The preparation method of ternary material unlike the first embodiment, this method include at least following steps:
The mixed solvent (two of second alcohol and water is added by the molar ratio of 8:1:1 by the first step for nickel nitrate, cobalt acetate, manganese oxalate
The volume ratio of person obtains the mixing salt solution of 3mol/L, it is molten which is added salt-mixture to be uniformly mixed in 1:1)
In liquid storage tank 12;By the ammonium hydroxide of the NaOH and 3mol/L of the volume ratio mixing 3mol/L of 2:1, coprecipitator solution is obtained, is added
In coprecipitator storage tank 13;
Solution in mixing salt solution storage tank and coprecipitator storage tank is heated to 52 DEG C by second step, anti-to jet pipe type
It answers in device and feeds, so that the pH value of mixed slurry is 11;
Third step, material after quick hybrid reaction, enter from discharge port into ultrasonic aging pond in jet pipe type reactor,
The ageing duration is 6h;
The slurry that ageing is completed is separated by solid-liquid separation by the 4th step, the first eardrum formula plate and frame filter press, obtained filter cake
Material in predrying equipment after 105 DEG C of dry 8h, drying is added pure water using wet stirring ball mill and carries out at crushing
Reason;
The smashed slurry of wet stirring ball mill is carried out washing and solid-liquid by the 5th step, secondary tympanic membrane formula plate and frame filter press
Separation;
6th step, the filter cake that the 5th step is obtained is added in beater, while pure water and lithium salts is added, and then breaks into
The slurry of 15wt% solid content, and it is sent into sanded treatment 10h in sand mill;
Slurry after sand milling is delivered to spray drying tower and carries out mist projection granulating, spray drying by the 7th step, material-handling pump
The inlet temperature of tower is 180 DEG C, and outlet temperature is 120 DEG C.
8th step carries out calcination processing to the powder that mist projection granulating obtains in atmosphere sintering furnace, first under oxygen atmosphere
The pre-burning 6h at 550 DEG C, then 800 DEG C of calcining 18h, obtain ternary material after furnace cooling.
Fig. 4 is X-ray diffraction (XRD) spectrogram of ternary material manufactured in the present embodiment, lattice parameter c/a value and I003/
I104Value is respectively 4.95 and 2.28, illustrates that the ternary material structural development of preparation is good, cationic mixing is less.It is tested by ICP
As a result it is found that the utility model preparation NCM811 material in, nickel, cobalt, three kinds of elements of manganese content than be about 1.00:1.08:
8.81, it is very close with Theoretical Design ratio, illustrate that the technical solution of the utility model is each when preparing nickelic ternary material
It is accurate that element metering, which is compared,.
Battery is made in the ternary material that the present embodiment synthesizes, charge-discharge test is carried out under 0.1C multiplying power, what is measured follows
Ring performance curve is as shown in figure 5, specific discharge capacity is about 199.3mAh/g, capacity retention ratio 90.2% after 50 circulations.
Embodiment 3
The preparation method of ternary material unlike the first embodiment, this method include at least following steps:
The mixed solvent (two of acetone and water is added by the molar ratio of 7:2:1 by the first step for nickel acetate, cobalt nitrate, aluminum nitrate
The volume ratio of person obtains the mixing salt solution of 2.5mol/L, which is added salt-mixture to be uniformly mixed in 1:1)
In solution reservoir 12;By the ammonium hydroxide of the NaOH and 2.5mol/L of the volume ratio mixing 2.5mol/L of 2:1, it is molten to obtain coprecipitator
Liquid is added in coprecipitator storage tank 13;
Solution in mixing salt solution storage tank and coprecipitator storage tank is heated to 58 DEG C by second step, anti-to jet pipe type
It answers in device and feeds, so that the pH value of mixed slurry is 11;
Third step, material after quick hybrid reaction, enter from discharge port into ultrasonic aging pond in jet pipe type reactor,
The ageing duration is 3h;
The slurry that ageing is completed is separated by solid-liquid separation by the 4th step, the first eardrum formula plate and frame filter press, obtained filter cake
Material in predrying equipment after 108 DEG C of dry 4h, drying is added pure water using wet stirring ball mill and carries out at crushing
Reason;
The smashed slurry of wet stirring ball mill is carried out washing and solid-liquid by the 5th step, secondary tympanic membrane formula plate and frame filter press
Separation;
6th step, the filter cake that the 5th step is obtained is added in beater, while pure water and lithium salts is added, and then breaks into
The slurry of 18wt% solid content, and it is sent into sanded treatment 12h in sand mill;
Slurry after sand milling is delivered to spray drying tower and carries out mist projection granulating, spray drying by the 7th step, material-handling pump
The inlet temperature of tower is 170 DEG C, and outlet temperature is 110 DEG C.
8th step carries out calcination processing to the powder that mist projection granulating obtains in atmosphere sintering furnace, first under oxygen atmosphere
The pre-burning 9h at 450 DEG C, then 750 DEG C of calcining 16h, obtain ternary material after furnace cooling.
Battery is made in the ternary material that the present embodiment synthesizes, charge-discharge test is carried out under 0.1C multiplying power, the results showed that,
Specific discharge capacity is about 196mAh/g, capacity retention ratio 89.5% after 50 circulations.
Embodiment 4
The preparation method of ternary material unlike the first embodiment, this method include at least following steps:
Nickel acetate, cobalt nitrate, manganese nitrate are added in ethyl alcohol and are uniformly mixed by the molar ratio of 5:2:3, obtained by the first step
The mixing salt solution is added in mixing salt solution storage tank 12 mixing salt solution of 2.2mol/L;It is mixed by the volume ratio of 2:1
The ammonium hydroxide of the NaOH and 2.8mol/L of 2.8mol/L obtain coprecipitator solution, are added in coprecipitator storage tank 13;
Solution in mixing salt solution storage tank and coprecipitator storage tank is heated to 56 DEG C by second step, anti-to jet pipe type
It answers in device and feeds, so that the pH value of mixed slurry is 10;
Third step, material after quick hybrid reaction, enter from discharge port into ultrasonic aging pond in jet pipe type reactor,
The ageing duration is 7h;
The slurry that ageing is completed is separated by solid-liquid separation by the 4th step, the first eardrum formula plate and frame filter press, obtained filter cake
Material in predrying equipment after 112 DEG C of dry 5h, drying is added pure water using wet stirring ball mill and carries out at crushing
Reason;
The smashed slurry of wet stirring ball mill is carried out washing and solid-liquid by the 5th step, secondary tympanic membrane formula plate and frame filter press
Separation;
6th step, the filter cake that the 5th step is obtained is added in beater, while pure water and lithium salts is added, and then breaks into
The slurry of 23wt% solid content, and it is sent into sanded treatment 14h in sand mill;
Slurry after sand milling is delivered to spray drying tower and carries out mist projection granulating, spray drying by the 7th step, material-handling pump
The inlet temperature of tower is 160 DEG C, and outlet temperature is 105 DEG C.
8th step carries out calcination processing to the powder that mist projection granulating obtains in atmosphere sintering furnace, first under oxygen atmosphere
The pre-burning 6h at 560 DEG C, then 780 DEG C of calcining 17h, obtain ternary material after furnace cooling.
Battery is made in the ternary material that the present embodiment synthesizes, charge-discharge test is carried out under 0.1C multiplying power, the results showed that,
Specific discharge capacity is about 202mAh/g, capacity retention ratio 91.3% after 50 circulations.
To sum up, technical solutions of the utility model are suitable for the preparation of the ternary material of a variety of proportions.
According to the disclosure and teachings of the above specification, the utility model those skilled in the art can also be to above-mentioned reality
The mode of applying is changed and is modified.Therefore, the utility model is not limited to above-mentioned specific embodiment, all this field skills
It is practical new that art personnel any conspicuous improvement made on the basis of the utility model, replacement or modification belong to this
The protection scope of type.In addition, these terms are intended merely to facilitate although using some specific terms in this specification
It is bright, any restrictions are not constituted to the utility model.