CN107565111A - The nano modification method of LiFePO4 and its nano modification LiFePO4 and lithium ion battery of preparation - Google Patents
The nano modification method of LiFePO4 and its nano modification LiFePO4 and lithium ion battery of preparation Download PDFInfo
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- CN107565111A CN107565111A CN201710749469.9A CN201710749469A CN107565111A CN 107565111 A CN107565111 A CN 107565111A CN 201710749469 A CN201710749469 A CN 201710749469A CN 107565111 A CN107565111 A CN 107565111A
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Abstract
The invention provides a kind of nano modification method of LiFePO4 and its nano modification LiFePO4 and lithium ion battery of preparation, it is related to lithium ion anode material technical field, this method carries out ball milling after mixing LiFePO4 raw material and the carbon source being optionally added, obtain the LiFePO4 of Nano Particle, mist projection granulating then is carried out to nano-grade lithium iron phosphate, then carries out the nano-grade lithium iron phosphate obtained after mist projection granulating to be calcined obtained nano modification LiFePO4.The nano modification LiFePO4 has the advantages of specific surface area height and small granularity, simultaneously, the nano modification LiFePO4 has good tap density, after granulation the defects of material and micropore is more, and then significantly improves the reserve of electricity of nano modification LiFePO4 of the present invention.Nano modification LiFePO4 produced by the present invention can be widely applied to the preparation of anode material for lithium-ion batteries.
Description
Technical field
The present invention relates to lithium ion anode material technical field, more particularly, to a kind of nano modification side of LiFePO4
Method and its nano modification LiFePO4 and lithium ion battery of preparation.
Background technology
With the continuous development of human society, environmental problem is increasingly highlighted, and recent year haze weather is persistently aggravated more
Expectation of the people to enhancement of environment is aggravated, along with the rise of national new energy strategy, lithium ion battery cleans as a kind of
The energy, because of small volume, energy density height, safety and environmental protection, it is developed so far, has been obtained for widely should from the beginning of the nineties in last century
With the positive electrode as its chief component also achieves significant progress.
As anode material for lithium-ion batteries, its theoretical capacity was up to 170mAh/g to LiFePO4, from quilt in 1997
Goodenough etc. is reported first, because its raw material sources is wide, cheap, material heat endurance is good, voltage platform is high, the circulation longevity
Life is long, nontoxic, will not have oxygen evolution under abuse conditions, and can solve cobalt acid lithium and other existing positive electrodes can not solve
Safety problem certainly, and as current driving force shape and the first choice of energy storage shape anode material for lithium-ion batteries.
But the ionic conductance and electron conductivity of existing LiFePO 4 material are relatively low, are only suitable in low current
Carry out discharge and recharge under density, specific capacity reduces during high power charging-discharging, and tap density is relatively low, and which results in LiFePO4 specific capacity
It is not high, even if the capacity that some producers do is high, it is also difficult to ensure the stability between each batch.These shortcomings limit of LiFePO4
The application of the material is made.For improve drawbacks described above at present widely used technology mainly comprising prepare nano-scale lithium iron phosphate,
The modes such as porous calcium phosphate iron lithium, carbon coating, metal ion mixing are prepared to be modified LiFePO 4 material, but these above-mentioned sides
The common feature of method is that obtained LiFePO4 is more loose, and the tap density of material is relatively low, influences the energy of electrokinetic cell
Density, thus how while nanosizing LiFePO4 and can keeps higher tap density and compacted density to turn into key.
Therefore, research and develop one kind and the improved method of nanosizing is carried out to existing LiFePO4, using nanosizing
Technology shortens the diffusion length between material and electrolyte, and then improves the ionic conductance and electron conductivity of LiFePO4
Meanwhile and can makes LiFePO 4 material reach higher tap density becomes very necessary and urgent, there is very extensive business
Industry application prospect.
In view of this, it is special to propose the present invention.
The content of the invention
The first object of the present invention is a kind of nano modification method for providing LiFePO4, and methods described is received in use
Riceization technology improve LiFePO4 ionic conductance and electron conductivity while, again have make LiFePO 4 material reach compared with
The advantages of high tap density.
The second object of the present invention is to provide a kind of nano modification LiFePO4, nano modification LiFePO4 tool
There are high-tap density, high gram volume and electrochemical performance.
The third object of the present invention is to provide a kind of lithium ion battery, and the positive electrode of the lithium ion battery is received by above-mentioned
Riceization modified phosphate iron lithium is prepared, and the lithium ion battery as made from above-mentioned positive electrode has electron conductivity height, battery
The advantages that reserve of electricity is big.
A kind of nano modification method of LiFePO4 provided by the invention, comprises the following steps：
Step a：Ball milling is carried out after LiFePO4 raw material and the carbon source being optionally added are mixed, obtains nano-grade lithium iron phosphate,
Mist projection granulating then is carried out to nano-grade lithium iron phosphate；
Step b：Nano-grade lithium iron phosphate after step a mist projection granulatings is calcined under protective atmosphere nano modification is made
LiFePO4.
Further, LiFePO4 raw material and the mass ratio for the carbon source being optionally added are 20~200 in above-mentioned steps a：1.
Further, the carbon source being optionally added include glucose, sucrose, fructose, graphite, conductive black, citric acid and
In starch any one or at least two combination.
Further, the ball grinding method in above-mentioned steps a is wet ball grinding；
Further, the decentralized medium of wet ball grinding is one kind in deionized water, ethanol, ethylene glycol or isopropanol.
Preferably, the decentralized medium of wet ball grinding is deionized water.
Further, it is spray-dried in above-mentioned steps a in dry machine, drying machine with centrifugal spray or the Pressuresprayingdrier of spraying
Middle progress；
Preferably, the inlet temperature of spray drying is 200~350 DEG C, and outlet temperature is 60~120 DEG C.
Further, the sintering temperature of step b roastings is 500~900 DEG C, and roasting time is 2~10 hours.
Further, above-mentioned protective atmosphere includes any one in nitrogen, argon gas, helium, neon, Krypton and xenon
Kind or at least two combination.
Preferably, protective atmosphere is nitrogen.
A kind of nano modification LiFePO4 provided by the invention, the nano modification LiFePO4 is by above-mentioned modification
Method is made.
A kind of lithium ion battery provided by the invention, the positive electrode of the lithium ion battery include above-mentioned nano modification
LiFePO4 is prepared.
Compared with prior art, beneficial effects of the present invention are：
Lithium iron phosphate nano method of modifying provided by the invention mixes LiFePO4 raw material and the carbon source being optionally added
After carry out ball milling, obtain the LiFePO4 of Nano Particle, then to nano-grade lithium iron phosphate carry out mist projection granulating, then will spraying
The nano-grade lithium iron phosphate obtained after granulation is calcined under protective atmosphere is made nano modification LiFePO4.After ball milling
LiFePO4 is nano-scale lithium iron phosphate, and it has the advantages of specific surface area height and small granularity, wherein, nano-scale lithium iron phosphate
Specific surface area height increases reaction interface and can provide more diffusion admittances；Meanwhile nano-scale lithium iron phosphate granularity is small,
The insert depth of lithium ion wherein is shallow, diffusion path is short, and electrode process has good kinetic property, can effectively improve it
Electric conductivity, in addition, the nano-grade lithium iron phosphate as made from above-mentioned nano-scale lithium iron phosphate mist projection granulating has higher tap density,
After granulation the defects of material and micropore is more, and then significantly improve the reserve of electricity of nano lithium iron phosphate with high tap density of the present invention.
Nano modification LiFePO4 provided by the invention, the nano modification LiFePO4 is by above-mentioned lithium iron phosphate nano
Change method of modifying to be made, its tap density can reach 1.4~1.7g/cm3Left and right, gram volume is by 140 original~145mAh/
G brings up to 155~160mAh/g, simultaneously because material particle size is small, the insert depth of lithium ion wherein is shallow, diffusion path
Short, electrode process has good kinetic property, can effectively improve the electric conductivity of material.
A kind of lithium ion battery provided by the invention, the positive electrode of the lithium ion battery is by above-mentioned nano modification phosphoric acid
Iron lithium, the lithium ion battery as made from above-mentioned positive electrode have the advantages that electron conductivity is high, and battery reserve of electricity is big.
Brief description of the drawings
, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical scheme of the prior art
The required accompanying drawing used is briefly described in embodiment or description of the prior art, it should be apparent that, in describing below
Accompanying drawing is some embodiments of the present invention, for those of ordinary skill in the art, before creative work is not paid
Put, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the ESEM schematic diagram for the iron phosphate powder that embodiment 5 is handled without nanosizing；
Fig. 2 is ESEM signal of the nano modification LiFePO4 of the preparation of embodiment 5 under 55.4 μm of field ranges
Figure；
Fig. 3 is ESEM signal of the nano modification LiFePO4 of the preparation of embodiment 5 under 5.54 μm of field ranges
Figure；
Fig. 4 is ESEM signal of the nano modification LiFePO4 of the preparation of embodiment 5 under 2.77 μm of field ranges
Figure；
Fig. 5 is the X-ray diffractogram of nano modification LiFePO4 prepared by embodiment 5.
Embodiment
Technical scheme is clearly and completely described below in conjunction with accompanying drawing, it is clear that described implementation
Example is part of the embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill
The every other embodiment that personnel are obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
According to an aspect of the present invention, a kind of nano modification method of LiFePO4, comprises the following steps：
Step a：Ball milling is carried out after LiFePO4 raw material and the carbon source being optionally added are mixed, obtains nano-grade lithium iron phosphate,
Mist projection granulating then is carried out to nano-grade lithium iron phosphate；
Step b：Nano-grade lithium iron phosphate after step a mist projection granulatings is calcined under protective atmosphere nano modification is made
LiFePO4.
Lithium iron phosphate nano method of modifying provided by the invention mixes LiFePO4 raw material and the carbon source being optionally added
After carry out ball milling, obtain the LiFePO4 of Nano Particle, then to nano-grade lithium iron phosphate carry out mist projection granulating, then will spraying
The nano-grade lithium iron phosphate obtained after granulation is calcined under protective atmosphere is made nano modification LiFePO4.After ball milling
LiFePO4 is nano-scale lithium iron phosphate, and it has the advantages of specific surface area height and small granularity, wherein, nano-scale lithium iron phosphate
Specific surface area height increases reaction interface and can provide more diffusion admittances；Meanwhile nano-scale lithium iron phosphate granularity is small,
The insert depth of lithium ion wherein is shallow, diffusion path is short, and electrode process has good kinetic property, can effectively improve it
Electric conductivity, in addition, the nano-grade lithium iron phosphate as made from above-mentioned nano-scale lithium iron phosphate mist projection granulating has higher tap density,
After granulation the defects of material and micropore is more, and then significantly improve the reserve of electricity of nano lithium iron phosphate with high tap density of the present invention.
In the present invention, above-mentioned steps a LiFePO4s raw material is common commercially available iron phosphate powder, and the powder is aspheric
Shape, irregular shape, handled without nanosizing, particle diameter D50 is 8~20 μm, and tap density is in 0.8~1.0g/cm3。
In the present invention, for the difference in subsequent applications field, what above-mentioned LiFePO4 raw material can also be optional before ball milling
Carbon source is added, LiFePO4 raw material will be included and carbon source carries out ball milling, carbon source can be made to be attached to the LiFePO4 of nanosizing
On, and then the electric property of nanosizing LiFePO4 is improved, obtained more preferably for nanosizing LiFePO4 subsequently is prepared into battery
Electric property make basis.
In above-mentioned preferred embodiment, LiFePO4 raw material and the mass ratio for the carbon source being optionally added in above-mentioned steps a
For 20~200：1.
In above-mentioned preferred embodiment, carbon source include glucose, sucrose, fructose, graphite, conductive black, citric acid and
In starch any one or at least two combination.
In the preferred embodiment of the present invention, the ball grinding method in above-mentioned steps a is wet ball grinding.
As a preferred embodiment, can be by the iron phosphate powder ball milling handled without nanosizing after ball milling
Particle diameter D50 100~200nm nano-scale particle.
Preferably, the particle diameter of the above-mentioned LiFePO4 raw material handled without nanosizing is that D50 is 8~20 μm.
In above-mentioned preferred embodiment, the decentralized medium of wet ball grinding is deionized water, ethanol, ethylene glycol or isopropanol
In one kind.
Preferably, the decentralized medium of wet ball grinding is deionized water.
In the preferred embodiment of the present invention, it is spray-dried in above-mentioned steps a in dry machine, the centrifugal spray dryer of spraying
Carried out in dry machine or Pressuresprayingdrier.
As a preferred embodiment, LiFePO4 is particle diameter D50 100~200nm nanoscale after ball milling
Grain, the nano-scale particle after above-mentioned ball milling is subjected to mist projection granulating, forms the spherical particle that particle diameter D50 is 3~10 μm, should
Particle appearance pattern is fixed.
In above-mentioned preferred embodiment, the inlet temperature of spray drying is 200~350 DEG C, and outlet temperature is 60~120
℃。
In the preferred embodiment of the present invention, the sintering temperature of step b roastings is 500~900 DEG C, during roasting
Between be 2~10 hours.
As a preferred embodiment, to nano-grade lithium iron phosphate 500~900 under the atmosphere of protective gas
Constant temperature calcining 2~10 hours under DEG C environment, wherein protective gas can prevent that oxidation occurs for nano-grade lithium iron phosphate anti-under high temperature
Should, and influence the purity of end-product.
Preferably, above-mentioned roasting process is carried out in atmosphere furnace.
In above-mentioned preferred embodiment, above-mentioned protective gas includes nitrogen, argon gas, helium, neon, Krypton and xenon
In any one or at least two combination.
Preferably, protective atmosphere is nitrogen.
As preferable technical scheme, preparation method of the invention, comprise the following steps：
(1), non-nanosizing LiFePO4 raw material and carbon source are sufficiently mixed, obtain LiFePO4 material powder；
(2), using wet ball grinding method by LiFePO4 material powder progress ball milling obtain particle diameter D50 for 100~
200nm nano-scale particle；
(3) nano-scale particle made from step (2), is subjected to mist projection granulating, the class ball that particle diameter D50 is 3~10 μm is made
Shape LiFePO4；
The inlet temperature of the mist projection granulating is 200~350 DEG C, and outlet temperature is 60~120 DEG C；
(4) step (3), is granulated obtained nano-grade lithium iron phosphate 500~900 DEG C of perseverances under the atmosphere of protective gas
Temperature roasting 2~10 hours, is made nano modification LiFePO4.
According to an aspect of the present invention, a kind of nano modification LiFePO4, the nano modification LiFePO4 by
Above-mentioned method of modifying is made.
In the present invention, by nano modification LiFePO4 made from above-mentioned preparation method, its tap density can reach
1.4~1.7g/cm3 or so, gram volume brings up to 155~160mAh/g by 140 original~145mAh/g, simultaneously because material
Material granularity is small, and the insert depth of lithium ion wherein is shallow, diffusion path is short, and electrode process has good kinetic property,
The electric conductivity of material can be effectively improved.
According to an aspect of the present invention, a kind of lithium ion battery, the positive electrode of the lithium ion battery include above-mentioned receive
Riceization modified phosphate iron lithium, the lithium ion battery as made from above-mentioned positive electrode have electron conductivity high, and battery reserve of electricity is big
The advantages that.
Embodiment 1
A kind of nano modification method of LiFePO4, comprises the following steps：
(1) glucose, is added in the LiFePO4 raw material of non-nanosizing to be sufficiently mixed, and obtains LiFePO4 raw material powder
End；
The mass percent of iron phosphate powder is 95% in the LiFePO4 material powder, the glucose as carbon source
Mass percent be 5%；
(2) it is 100nm's that LiFePO4 material powder progress ball milling, is obtained into particle diameter D50 using the method for wet ball grinding
Nano-scale particle；
(3) nano-scale particle made from step (2), is subjected to mist projection granulating, the spherical phosphorus that particle diameter D50 is 3 μm is made
Sour iron lithium；
The inlet temperature of the mist projection granulating is 200 DEG C, and outlet temperature is 60 DEG C；
(4) step (3), is granulated obtained nano-grade lithium iron phosphate 500 DEG C of constant temperature calcinings 2 under the atmosphere of protective gas
Hour, nano modification LiFePO4 is made.
Embodiment 2
A kind of nano modification method of LiFePO4, comprises the following steps：
(1), the LiFePO4 raw material and sucrose of non-nanosizing are sufficiently mixed, obtain LiFePO4 material powder；
The mass percent of iron phosphate powder is 97% in the LiFePO4 material powder, the sucrose as carbon source
Mass percent is 3%；
(2) it is 200nm's that LiFePO4 material powder progress ball milling, is obtained into particle diameter D50 using the method for wet ball grinding
Nano-scale particle；
(3) nano-scale particle made from step (2), is subjected to mist projection granulating, it is 10 μm spherical that particle diameter D50, which is made,
LiFePO4；
The inlet temperature of the mist projection granulating is 350 DEG C, and outlet temperature is 120 DEG C；
(4) step (3), is granulated obtained nano-grade lithium iron phosphate 900 DEG C of constant temperature calcinings under the atmosphere of protective gas
10 hours, nano modification LiFePO4 is made.
Embodiment 3
A kind of nano modification method of LiFePO4, comprises the following steps：
(1) the LiFePO4 raw material of non-nanosizing, is obtained into particle diameter D50 using the method progress ball milling of wet ball grinding is
140nm nano-scale particle；
(3) nano-scale particle made from step (2), is subjected to mist projection granulating, the spherical phosphorus that particle diameter D50 is 5 μm is made
Sour iron lithium；
The inlet temperature of the mist projection granulating is 250 DEG C, and outlet temperature is 80 DEG C；
(4) step (3), is granulated obtained nano-grade lithium iron phosphate 600 DEG C of constant temperature calcinings under the atmosphere of protective gas
40 hours, nano modification LiFePO4 is made.
Embodiment 4
A kind of nano modification method of LiFePO4, comprises the following steps：
(1), the LiFePO4 raw material and conductive black of non-nanosizing are sufficiently mixed, obtain LiFePO4 raw material powder
End；
The mass percent of iron phosphate powder is 99.5% in the LiFePO4 material powder, the sucrose as carbon source
Mass percent be 0.5%；
(2) it is 180nm's that LiFePO4 material powder progress ball milling, is obtained into particle diameter D50 using the method for wet ball grinding
Nano-scale particle；
(3) nano-scale particle made from step (2), is subjected to mist projection granulating, the spherical phosphorus that particle diameter D50 is 8 μm is made
Sour iron lithium；
The inlet temperature of the mist projection granulating is 300 DEG C, and outlet temperature is 100 DEG C；
(4) step (3), is granulated obtained nano-grade lithium iron phosphate 800 DEG C of constant temperature calcinings 8 under the atmosphere of protective gas
Hour, nano modification LiFePO4 is made.
Embodiment 5
A kind of nano modification method of LiFePO4, comprises the following steps：
(1), the LiFePO4 raw material and starch of non-nanosizing are sufficiently mixed, obtain LiFePO4 material powder；
The mass percent of iron phosphate powder is 98% in the LiFePO4 material powder, the starch as carbon source
Mass percent is 2%；
(2) it is 150nm's that LiFePO4 material powder progress ball milling, is obtained into particle diameter D50 using the method for wet ball grinding
Nano-scale particle；
(3) nano-scale particle made from step (2), is subjected to mist projection granulating, the spherical phosphorus that particle diameter D50 is 5 μm is made
Sour iron lithium；
The inlet temperature of the mist projection granulating is 300 DEG C, and outlet temperature is 100 DEG C；
(4) step (3), is granulated obtained nano-grade lithium iron phosphate 700 DEG C of constant temperature calcinings 7 under the atmosphere of protective gas
Hour, nano modification LiFePO4 is made.
Fig. 1 is the ESEM schematic diagram of the iron phosphate powder without nanosizing of the present invention processing in the present embodiment, from
It can be seen from the figure that should be aspherical, irregular shape without the LiFePO4 of nanosizing of the present invention processing, and structure is very loose
Dissipate.
Fig. 2 is ESEM signal of the nano modification LiFePO4 manufactured in the present embodiment under 55.4 μm of field ranges
Figure；Fig. 3 is ESEM schematic diagram of the nano modification LiFePO4 manufactured in the present embodiment under 5.54 μm of field ranges；Figure
4 be ESEM schematic diagram of the nano modification LiFePO4 manufactured in the present embodiment under 2.77 μm of field ranges.By above-mentioned
It is spherical of 3~10 μm that Fig. 2~Fig. 4, which can be seen that nano modification LiFePO4 made from the present embodiment as particle diameter D50,
Grain, exterior appearance is fixed, particle is uniform, good dispersion, and structure is more close.
Fig. 5 is the X-ray diffractogram of nano modification LiFePO4 manufactured in the present embodiment, as can be seen from the figure this reality
The purity for applying the nano lithium iron phosphate with high tap density material that example is prepared is higher.
Effect example 1
To show that lithium iron phosphate nano method of modifying of the present invention can receive commercially available common LiFePO4 material modification
Riceization modified phosphate iron lithium, and then make the LiFePO 4 material that there is higher tap density and capacitance, existing spy will be without this
The nano modification LiFePO4 that the iron phosphate powder of invention nanosizing processing is prepared with the embodiment of the present invention 1~5 enters
Row detection, its testing result are as follows：
In summary, nano modification LiFePO4 provided by the invention, the nano modification LiFePO4 is by above-mentioned phosphorus
Sour iron lithium nano modification method is made, and its tap density can reach 1.4~1.7g/cm3 or so, and gram volume is by original
140~145mAh/g brings up to 155~160mAh/g, simultaneously because material particle size is small, the insert depth of lithium ion wherein
It is shallow, diffusion path is short, electrode process has good kinetic property, can effectively improve the electric conductivity of material.
Finally it should be noted that：Various embodiments above is merely illustrative of the technical solution of the present invention, rather than its limitations；To the greatest extent
The present invention is described in detail with reference to foregoing embodiments for pipe, it will be understood by those within the art that：Its according to
The technical scheme described in foregoing embodiments can so be modified, either which part or all technical characteristic are entered
Row equivalent substitution；And these modifications or replacement, the essence of appropriate technical solution is departed from various embodiments of the present invention technology
The scope of scheme.
Claims (10)
1. a kind of nano modification method of LiFePO4, it is characterised in that comprise the following steps：
Step a：Ball milling is carried out after LiFePO4 raw material and the carbon source being optionally added are mixed, obtains nano-grade lithium iron phosphate, then
Mist projection granulating is carried out to nano-grade lithium iron phosphate；
Step b：Nano-grade lithium iron phosphate after step a mist projection granulatings is calcined under protective atmosphere nano modification phosphoric acid is made
Iron lithium.
2. the nano modification method of LiFePO4 according to claim 1, it is characterised in that phosphoric acid in the step a
Iron lithium raw material and the mass ratio for the carbon source being optionally added are 20~200：1.
3. the nano modification method of LiFePO4 according to claim 2, it is characterised in that the carbon being optionally added
Source include glucose, sucrose, fructose, graphite, conductive black, citric acid and starch any one or at least two combination.
4. the nano modification method of LiFePO4 according to claim 1, it is characterised in that the ball in the step a
Mill method is wet ball grinding.
5. the nano modification method of LiFePO4 according to claim 4, it is characterised in that point of the wet ball grinding
Dispersion media is mixing more than one or both of deionized water, ethanol, ethylene glycol or isopropanol；
Preferably, the decentralized medium of the wet ball grinding is deionized water.
6. the nano modification method of LiFePO4 according to claim 1, it is characterised in that sprayed in the step a
It is granulated and is carried out in spray dry machine, drying machine with centrifugal spray or Pressuresprayingdrier；
Preferably, the inlet temperature of the mist projection granulating is 200~350 DEG C, and outlet temperature is 60~120 DEG C.
7. the nano modification method of LiFePO4 according to claim 1, it is characterised in that the roasting of step b roastings
Temperature is 500~900 DEG C, and roasting time is 2~10 hours.
8. the nano modification method of LiFePO4 according to claim 7, it is characterised in that the protective atmosphere bag
Include in nitrogen, argon gas, helium, neon, Krypton and xenon any one or at least two combination；
Preferably, the protective atmosphere is nitrogen.
9. a kind of nano modification LiFePO4, it is characterised in that the nano modification LiFePO4 is by claim 1~8
Method of modifying described in any one is made.
10. a kind of lithium ion battery, it is characterised in that the positive electrode of the lithium ion battery is included described in claim 9
Nano modification LiFePO4.
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| CN114804058A (en) * | 2022-05-27 | 2022-07-29 | 湖北万润新能源科技股份有限公司 | High-tap-density lithium iron phosphate cathode material and preparation method and application thereof |
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| CN111252751A (en) * | 2018-12-03 | 2020-06-09 | 成都市银隆新能源有限公司 | Microfluidic droplet forming structural component and method for preparing solid spherical lithium iron phosphate |
| CN114804058A (en) * | 2022-05-27 | 2022-07-29 | 湖北万润新能源科技股份有限公司 | High-tap-density lithium iron phosphate cathode material and preparation method and application thereof |
| WO2023226372A1 (en) * | 2022-05-27 | 2023-11-30 | 湖北万润新能源科技股份有限公司 | High-tap-density lithium iron phosphate positive electrode material, and preparation method therefor and use thereof |
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