CN108767222A - A kind of preparation method of cation doping tertiary cathode material nanofiber - Google Patents
A kind of preparation method of cation doping tertiary cathode material nanofiber Download PDFInfo
- Publication number
- CN108767222A CN108767222A CN201810517729.4A CN201810517729A CN108767222A CN 108767222 A CN108767222 A CN 108767222A CN 201810517729 A CN201810517729 A CN 201810517729A CN 108767222 A CN108767222 A CN 108767222A
- Authority
- CN
- China
- Prior art keywords
- source
- solution
- cathode material
- tertiary cathode
- preparation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/362—Composites
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y40/00—Manufacture or treatment of nanostructures
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/50—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese
- H01M4/505—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/52—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron
- H01M4/525—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Nanotechnology (AREA)
- Inorganic Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Manufacturing & Machinery (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- Materials Engineering (AREA)
- Composite Materials (AREA)
- Battery Electrode And Active Subsutance (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
Abstract
A kind of preparation method of cation doping tertiary cathode material nanofiber, is related to nano material.Nickel source, cobalt source and manganese source are added in n,N-Dimethylformamide, magnetic agitation obtains solution A；Lithium source and metal cation source are added in solution A, is placed in thermostatical oil bath magnetic agitation, obtains solution B；Polyacrylonitrile is added in n,N-Dimethylformamide and is stirred, all obtains solution C after dissolving；Solution B is all added in solution C, thermostatical oil bath magnetic agitation is placed in, obtains solution D；Solution D is transferred in syringe, electrostatic spinning is carried out, spun product is received with aluminium foil；Products therefrom drying is placed in Muffle furnace and calcines 1~3h in 220~300 DEG C, 350~500 DEG C are then heated to, 3~5h is calcined, is finally warming up to 750~850 DEG C, room temperature is cooled to get cation doping tertiary cathode material nanofiber after calcining 8~16h again.
Description
Technical field
The present invention relates to nano materials, more particularly, to a kind of preparation of cation doping tertiary cathode material nanofiber
Method.
Background technology
In the past 20 years, one-dimensional nano structure can effectively be prepared by electrostatic spinning technique, still, most technology also only limits
In preparing simple component.For complex component, such as multivariant oxide, due to the difficult property spun and its complexity of its precursor solution
Growth course so that it is difficult to obtain intact pattern by electrostatic spinning, this severely limits electrostatic spinning techniques into one
Step application.For example, as a kind of excellent anode material for lithium-ion batteries, the stratiform oxo transition metal with one-dimentional structure pattern
Compound (LiNixCoyMnzO2(NCM), x+y+z=1) due to its big specific surface area, it is good caused by short ion diffusion path
Charge-transfer dynamics etc., can largely enhance the chemical property of this material.However, passing through electrostatic spinning skill
The relevant report that art prepares the NCM materials with good one-dimentional structure is also fewer, and complicated mistake is prepared using electrostatic spinning technique
Crossing metal oxide still has certain challenge.
Currently, anode material for lithium-ion batteries holistic approach progress is more slow, in the market mainly with cobalt acid lithium
(LiCoO2), LiMn2O4 (LiMn2O4), LiFePO4 (LiFePO4) it is leading.But the specific capacity of these positive electrodes is relatively low, resistance
Hinder the further promotion of lithium ion battery energy density.And ternary NCM positive electrodes compared with compared to, have higher specific capacity,
Can meet the needs of fields such as electric vehicle, aerospace to the full extent, have both three aspect of capacity, stability and cost
Advantage is a kind of very anode material for lithium-ion batteries with industrialization prospect.But due to cationic mixing effect and
The variation of material surface micro-structure in charge and discharge process, causes the first charge-discharge efficiency of ternary series material not high, and material
The ionic diffusion coefficient of material is relatively low so that its high rate performance is less desirable.In general, cation doping can be effectively improved
The performance of material some aspects, such as：Thermal stability, cycle performance and high rate performance etc..
Invention content
The object of the present invention is to provide preparation process to take a kind of sun that shorter, production consumes less, has good chemical property
The preparation method of ion doping tertiary cathode material nanofiber.
The chemical general formula of cation doping tertiary cathode material nanofiber of the present invention is LiNi1-x-yCoxMny- zMzO2, wherein 0<x<1,0<y<1,0≤z≤0.05, M are metal cation.
The preparation method of cation doping tertiary cathode material nanofiber of the present invention includes the following steps：
1) nickel source, cobalt source and manganese source are added in n,N-Dimethylformamide, magnetic agitation obtains solution A；
In step 1), the nickel source can be selected from nickel chloride (NiCl2), nickel sulfate (NiSO4), nickel acetate (Ni
(CH3COO)2·4H2At least one of O) etc.；The cobalt source can be selected from cobalt chloride (CoCl2), cobaltous sulfate (CoSO4), cobalt acetate
(Co(CH3COO)2·4H2At least one of O) etc.；The manganese source can be selected from manganese chloride (MnCl2), manganese sulfate (MnSO4), second
Sour manganese (Mn (CH3COO)2·4H2At least one of O) etc.；The nickel source, cobalt source, manganese source, N,N-dimethylformamide are matched
Than that can be that (((0.15~0.38) ︰ (20~40), wherein nickel source, cobalt source and manganese source are with matter by 0.20~0.34) ︰ by 0.34~0.64) ︰
Amount calculates, and n,N-Dimethylformamide is in terms of volume；The time of the magnetic agitation can be 30min~1h,
2) lithium source and metal cation source are added in solution A, is placed in thermostatical oil bath magnetic agitation, obtains solution B；
In step 2), the lithium source can be selected from lithium chloride (LiCl), lithium sulfate (Li2SO4), lithium acetate (CH3COOLi)
At least one of Deng, the metal cation source includes but not limited to niobium chloride (NbCl5)；The lithium source, metal cation
Source, solution A proportioning can be ((0~0.4) ︰ (100~300), wherein lithium source and metal cation source are in mass by 0.6~1) ︰
It calculates, solution A is in terms of volume；The thermostatical oil bath magnetic agitation that is placed in can be stirred magnetic force in 60~100 DEG C of thermostatical oil baths
Mix 8~12h.
3) polyacrylonitrile is added in n,N-Dimethylformamide and is stirred, all obtain solution C after dissolving；
In step 3), the molecular weight of the polyacrylonitrile (PAN) can be 150000；The polyacrylonitrile and N, N- diformazans
The proportioning of base formamide can be (0.5~0.8) ︰ (4~6), wherein polyacrylonitrile is calculated by mass, n,N-Dimethylformamide with
Volume calculates；The time of the stirring can be 8~12h.
4) solution B is all added in solution C, is placed in thermostatical oil bath magnetic agitation, obtains solution D；
In step 4), the thermostatical oil bath magnetic agitation that is placed in can be stirred magnetic force in 60~100 DEG C of thermostatical oil baths
Mix 8~12h；Li in the solution D+The molar concentration of ion can be 0.2~0.5mol/L, and obtaining solution D has certain viscosity.
5) solution D is transferred in syringe, carries out electrostatic spinning, spun product is received with aluminium foil；
In step 5), the design parameter of the electrostatic spinning can be：Liquid inventory be 0.2~0.7mL/h, syringe needle with connect
It is 15~20cm to receive the distance between plate, and positive high voltage is 13~20kV, and negative high voltage is 1~3kV.
6) drying of step 5) products therefrom is placed in Muffle furnace and calcines 1~3h in 220~300 DEG C, then heated to
350~500 DEG C, 3~5h is calcined, is finally warming up to 750~850 DEG C, then room temperature is cooled to get cation after calcining 8~16h
Adulterate tertiary cathode material nanofiber.
In step 6), the drying can be in 60~80 DEG C of dry 8~12h of vacuum；In calcination process, from room temperature
To 220~300 DEG C of heating rates be 1 DEG C/min, the heating rate for being warming up to 350~500 DEG C from 220~280 DEG C be 1 DEG C/
Min, the heating rate for being warming up to 750~850 DEG C from 350~550 DEG C are 2 DEG C/min；Temperature fall can be used in the cooling.
In the present invention, the cation of doping includes but not limited to Nb5+, can expand as other metal cations.Gained
Cation doping tertiary cathode material nanofiber is interconnected to constitute by the NCM nano particles of 200~400nm of diameter.
Compared with prior art, the beneficial effects of the present invention are：
The present invention finally obtains cation doping ternary NCM by accurately controlling electrostatic spinning procedure parameter with sintering process
Nanofiber.Dependence test characterization display, the 1-dimention nano fiber prepared through the invention are connected with each other group by NCM nano particles
At pattern is uniform.This integrality that ensure that electrolyte by the one-dimentional structure that nano particle forms and quickly infiltration, provide
Shorter Li+Diffusion path improves the high rate performance of lithium ion battery.Cation doping ternary NCM nanofibers have
Relatively large specific surface area and macroporous, can alleviate Li+Stereomutation during intercalation/deintercalation improves lithium ion battery
Cyclical stability.The bond energy of M-O keys is more than the bond energy of Me-O (Me=Ni, Co, Mn) key, and due to high electric conductivity and big
Ionic radius, foreign cation can expand Li+Channel promotes Li+Fast transferring, therefore cation doping can be into one
The structural stability and electric conductivity of step enhancing ternary material.The cation doping ternary NCM nanofibers prepared by the method
Specific capacity, high rate performance and the cyclical stability of lithium ion battery can be improved as anode material for lithium-ion batteries.This hair
Bright provided preparation method process is simple, it is short to take, it is low, pollution-free to produce consumption, there is huge application prospect.
Description of the drawings
Fig. 1 is the presoma SEM figure (scales 4 of cation doping tertiary cathode material nanofiber prepared by embodiment 1
μm)。
Fig. 2 is the presoma SEM figure (scales 1 of cation doping tertiary cathode material nanofiber prepared by embodiment 1
μm)。
Fig. 3 is the SEM figures of cation doping tertiary cathode material nanofiber prepared by embodiment 1 (scale is 2 μm).
Fig. 4 is the SEM figures (scale 400nm) of cation doping tertiary cathode material nanofiber prepared by embodiment 1.
Fig. 5 is cycle of the cation doping tertiary cathode material nanofiber of the preparation of embodiment 1 under 1C current densities
Performance map.
Fig. 6 is cycle of the cation doping tertiary cathode material nanofiber of the preparation of embodiment 1 under 5C current densities
Performance map.
Specific implementation mode
Following embodiment will the present invention is further illustrated in conjunction with attached drawing.
Embodiment 1：
LiNi1/3Co1/3Mn1/3-0.02Nb0.02O2The preparation method of nanofiber, includes the following steps：
1) 1.1mmol nickel acetates, 1.1mmol cobalt acetates, 1.1mmol manganese acetates are added to 5ml N, N- dimethyl formyls
In amine, magnetic agitation 1h makes it completely dissolved at room temperature, obtains uniform solution；
2) 3.7mmol lithium acetates are weighed, 0.066mmol niobium chlorides are added in step 1) acquired solution, be placed in 65 DEG C of perseverances
Warm oil bath pan magnetic agitation 12h, obtains uniform solution；
3) 0.6g polyacrylonitrile is weighed, adds it to 5mLN, in dinethylformamide, stirring at normal temperature 12h keeps it complete
It dissolves in portion；
4) step 2) acquired solution is all added in step 3) acquired solution, is placed in 65 DEG C of thermostatical oil bath magnetic force and stirs
12h is mixed, the uniform solution of certain viscosity is obtained；
5) step 4) acquired solution is transferred in syringe, between fluid flow 0.3mL/h, syringe needle and receiver board
Distance 17cm；Electrostatic spinning is carried out under the conditions of positive high voltage 14kV, negative high voltage 2kV, spun product is received with aluminium foil；
6) it by step 5) products therefrom 60 DEG C of dry 8h in a vacuum, is placed in Muffle furnace and is warming up to 280 with 1 DEG C/min
DEG C, 2h is calcined, is then warming up to 450 DEG C with 1 DEG C/min, calcines 5h, is finally warming up to 750 DEG C with 2 DEG C/min, 10h is calcined, obtains
To positive electrode ternary NCM nanofibers.
The LiNi that will be prepared1/3Co1/3Mn1/3-0.02Nb0.02O2Nanofiber is filled as anode material for lithium-ion batteries
It is made into button cell and carries out lithium ion battery chemical property test, the specific steps are：Using N-Methyl pyrrolidone as solvent,
Positive active material is uniformly mixed with acetylene black, PVDF according to the ratio of 8 ︰ of mass ratio, 1 ︰ 1, is coated on aluminium foil, through 60~
After 80 DEG C of forced air drying 8h, 12h is dried in vacuo in 100~120 DEG C.Battery is assembled in the glove box of argon gas protection, cathode is
Metal lithium sheet, diaphragm are polypropylene screen, and electrolyte is 1M LiPF6- EC/DMC (1 ︰ 1, v/v).Current density is 1C=160mA
g-1, charge and discharge blanking voltage is 2.7~4.3V.
With LiNi manufactured in the present embodiment1/3Co1/3Mn1/3-0.02Nb0.02O2For nanofiber, as illustrated in fig. 1 and 2, institute
Obtain cation doping ternary NCM nanofibers has good one-dimensional pattern after electrostatic spinning, shows that solution ratio is moderate, electricity
It is appropriate to spin parameter setting.As shown in Figures 3 and 4, after gradient temperature calcination processing, cation doping ternary NCM has good
One-dimensional pattern is the 1-dimention nano fiber connected by the nano particle of diameter about 200nm.As shown in figure 5, in 1C current densities
Under, after 100 cycles, the specific discharge capacity of material can be maintained at about 160mAh g-1, recycle conservation rate and be up to 94%.
As shown in fig. 6, under 5C current densities, after 200 cycles, the specific discharge capacity of material remains to be maintained at about 119mAh
g-1, illustrate that material has preferable multiplying power and cycle performance.
Embodiment 2：
LiNi0.4Co0.2Mn0.39Nb0.01O2The preparation method of nanofiber, includes the following steps：
1) 1.3mmol nickel chlorides, 0.65mmol cobalt chlorides, 1.29mmol manganese chlorides are added to 5ml N, N- dimethyl methyls
In amide, magnetic agitation 1h makes it completely dissolved at room temperature, obtains uniform solution；
2) 3.7mmol lithium chlorides are weighed, 0.033mmol niobium chlorides are added in step 1) acquired solution, be placed in 65 DEG C of perseverances
Warm oil bath pan magnetic agitation 12h, obtains uniform solution；
3) 0.6g polyacrylonitrile is weighed, adds it to 5mLN, in dinethylformamide, stirring at normal temperature 12h keeps it complete
It dissolves in portion；
4) step 2) acquired solution is all added in step 3) acquired solution, is placed in 65 DEG C of thermostatical oil bath magnetic force and stirs
12h is mixed, the uniform solution of certain viscosity is obtained；
5) step 4) acquired solution is transferred in syringe, between fluid flow 0.3mL/h, syringe needle and receiver board
Distance 17cm；Electrostatic spinning is carried out under the conditions of positive high voltage 14kV, negative high voltage 2kV, spun product is received with aluminium foil；
6) it by step 5) products therefrom 60 DEG C of dry 8h in a vacuum, is placed in Muffle furnace and is warming up to 280 with 1 DEG C/min
DEG C, 2h is calcined, is then warming up to 450 DEG C with 1 DEG C/min, calcines 5h, is finally warming up to 750 DEG C with 2 DEG C/min, 10h is calcined, obtains
To positive electrode ternary NCM nanofibers.
Embodiment 3：
LiNi0.5Co0.2Mn0.27Nb0.03O2The preparation method of nanofiber, includes the following steps：
1) 1.65mmol nickel acetates, 0.65mmol cobalt acetates, 0.89mmol manganese acetates are added to 5ml N, N- dimethyl
In formamide, magnetic agitation 1h makes it completely dissolved at room temperature, obtains uniform solution；
2) 3.7mmol lithium acetates are weighed, 0.099mmol niobium chlorides are added in step 1) acquired solution, be placed in 65 DEG C of perseverances
Warm oil bath pan magnetic agitation 12h, obtains uniform solution；
3) 0.6g polyacrylonitrile is weighed, adds it to 5mLN, in dinethylformamide, stirring at normal temperature 12h keeps it complete
It dissolves in portion；
4) step 2) acquired solution is all added in step 3) acquired solution, is placed in 65 DEG C of thermostatical oil bath magnetic force and stirs
12h is mixed, the uniform solution of certain viscosity is obtained；
5) step 4) acquired solution is transferred in syringe, between fluid flow 0.3mL/h, syringe needle and receiver board
Distance 17cm；Electrostatic spinning is carried out under the conditions of positive high voltage 14kV, negative high voltage 2kV, spun product is received with aluminium foil；
6) it by step 5) products therefrom 60 DEG C of dry 8h in a vacuum, is placed in Muffle furnace and is warming up to 280 with 1 DEG C/min
DEG C, 2h is calcined, is then warming up to 450 DEG C with 1 DEG C/min, calcines 5h, is finally warming up to 750 DEG C with 2 DEG C/min, 10h is calcined, obtains
To positive electrode ternary NCM nanofibers.
The present invention solves the problems, such as ternary material as some present in anode material for lithium-ion batteries, in conjunction with cation
The structural advantage of doping and monodimension nanometer material, has synthesized a kind of ternary layeredization of cation doping 1-dimention nano fibre structure
Object is closed as positive electrode, so as to improve the chemical property of lithium ion battery.
Claims (10)
1. a kind of preparation method of cation doping tertiary cathode material nanofiber, it is characterised in that the cation doping three
The chemical general formula of first positive electrode nanofiber is LiNi1-x-yCoxMny-zMzO2, wherein 0<x<1,0<y<1,0≤z≤0.05, M
For metal cation, the described method comprises the following steps：
1) nickel source, cobalt source and manganese source are added in n,N-Dimethylformamide, magnetic agitation obtains solution A；
2) lithium source and metal cation source are added in solution A, is placed in thermostatical oil bath magnetic agitation, obtains solution B；
3) polyacrylonitrile is added in n,N-Dimethylformamide and is stirred, all obtain solution C after dissolving；
4) solution B is all added in solution C, is placed in thermostatical oil bath magnetic agitation, obtains solution D；
5) solution D is transferred in syringe, carries out electrostatic spinning, spun product is received with aluminium foil；
6) drying of step 5) products therefrom is placed in Muffle furnace and calcines 1~3h in 220~300 DEG C, then heat to 350~
500 DEG C, 3~5h is calcined, is finally warming up to 750~850 DEG C, then room temperature is cooled to get cation doping after calcining 8~16h
Tertiary cathode material nanofiber.
2. a kind of preparation method of cation doping tertiary cathode material nanofiber as described in claim 1, it is characterised in that
In step 1), the nickel source is selected from least one of nickel chloride, nickel sulfate, nickel acetate；The cobalt source is selected from cobalt chloride, sulphur
At least one of sour cobalt, cobalt acetate；The manganese source is selected from least one of manganese chloride, manganese sulfate, manganese acetate；The nickel
Source, cobalt source, manganese source, the proportioning of N,N-dimethylformamide are (0.34~0.64) ︰ (0.20~0.34) ︰ (0.15~0.38) ︰
(20~40), wherein nickel source, cobalt source and manganese source are calculated by mass, and n,N-Dimethylformamide is in terms of volume.
3. a kind of preparation method of cation doping tertiary cathode material nanofiber as described in claim 1, it is characterised in that
In step 1), the time of the magnetic agitation is 30min~1h.
4. a kind of preparation method of cation doping tertiary cathode material nanofiber as described in claim 1, it is characterised in that
In step 2), the lithium source is selected from least one of lithium chloride, lithium sulfate, lithium acetate, and the metal cation source includes
But it is not limited to niobium chloride；The lithium source, metal cation source, solution A proportioning be (0.6~1) ︰ (0~0.4) ︰ (100~
300), wherein lithium source and metal cation source is calculated by mass, and solution A is in terms of volume.
5. a kind of preparation method of cation doping tertiary cathode material nanofiber as described in claim 1, it is characterised in that
In step 2), the thermostatical oil bath magnetic agitation that is placed in is 8~12h of magnetic agitation in 60~100 DEG C of thermostatical oil baths.
6. a kind of preparation method of cation doping tertiary cathode material nanofiber as described in claim 1, it is characterised in that
In step 3), the molecular weight of the polyacrylonitrile is 150000；The proportioning of the polyacrylonitrile and N,N-dimethylformamide
For (0.5~0.8) ︰ (4~6), wherein polyacrylonitrile is calculated by mass, and n,N-Dimethylformamide is in terms of volume；It is described to stir
The time mixed can be 8~12h.
7. a kind of preparation method of cation doping tertiary cathode material nanofiber as described in claim 1, it is characterised in that
In step 4), the thermostatical oil bath magnetic agitation that is placed in is 8~12h of magnetic agitation in 60~100 DEG C of thermostatical oil baths.
8. a kind of preparation method of cation doping tertiary cathode material nanofiber as described in claim 1, it is characterised in that
In step 4), Li in the solution D+The molar concentration of ion is 0.2~0.5mol/L.
9. a kind of preparation method of cation doping tertiary cathode material nanofiber as described in claim 1, it is characterised in that
In step 5), the design parameter of the electrostatic spinning is：Liquid inventory is 0.2~0.7mL/h, between syringe needle and receiver board
Distance is 15~20cm, and positive high voltage is 13~20kV, and negative high voltage is 1~3kV.
10. a kind of preparation method of cation doping tertiary cathode material nanofiber as described in claim 1, it is characterised in that
In step 6), the drying is in 60~80 DEG C of dry 8~12h of vacuum；In calcination process, from room temperature to 220~
300 DEG C of heating rate is 1 DEG C/min, and the heating rate for being warming up to 350~500 DEG C from 220~280 DEG C is 1 DEG C/min, from
350~550 DEG C of heating rates for being warming up to 750~850 DEG C are 2 DEG C/min；Temperature fall can be used in the cooling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810517729.4A CN108767222B (en) | 2018-05-25 | 2018-05-25 | Preparation method of cation-doped ternary cathode material nanofiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810517729.4A CN108767222B (en) | 2018-05-25 | 2018-05-25 | Preparation method of cation-doped ternary cathode material nanofiber |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108767222A true CN108767222A (en) | 2018-11-06 |
| CN108767222B CN108767222B (en) | 2020-09-04 |
Family
ID=64005987
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810517729.4A Expired - Fee Related CN108767222B (en) | 2018-05-25 | 2018-05-25 | Preparation method of cation-doped ternary cathode material nanofiber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108767222B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109817974A (en) * | 2019-03-27 | 2019-05-28 | 山东理工大学 | A kind of sodium ion nickel manganese magnesium iron quaternary positive electrode and preparation method thereof |
| CN110931759A (en) * | 2019-12-19 | 2020-03-27 | 温州涂屋信息科技有限公司 | Al (aluminum)2O3Coated Co-W double-doped LiNiO2Lithium ion battery anode material and preparation method thereof |
| CN115536080A (en) * | 2022-11-29 | 2022-12-30 | 瑞浦兰钧能源股份有限公司 | High-nickel positive electrode material and preparation method and application thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101147282A (en) * | 2005-03-23 | 2008-03-19 | 松下电器产业株式会社 | Lithium ion secondary battery and manufacturing method therefor |
| CN102414878A (en) * | 2009-04-24 | 2012-04-11 | 大日本印刷株式会社 | Electrode plate for nonaqueous electrolyte secondary battery, method for producing electrode plate for nonaqueous electrolyte secondary battery, and nonaqueous electrolyte secondary battery |
| US20180090768A1 (en) * | 2016-09-26 | 2018-03-29 | The Regents Of The University Of California | Holey graphene framework composites for ultra-high rate energy storage and methods of preparing such composites |
-
2018
- 2018-05-25 CN CN201810517729.4A patent/CN108767222B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101147282A (en) * | 2005-03-23 | 2008-03-19 | 松下电器产业株式会社 | Lithium ion secondary battery and manufacturing method therefor |
| CN102414878A (en) * | 2009-04-24 | 2012-04-11 | 大日本印刷株式会社 | Electrode plate for nonaqueous electrolyte secondary battery, method for producing electrode plate for nonaqueous electrolyte secondary battery, and nonaqueous electrolyte secondary battery |
| US20180090768A1 (en) * | 2016-09-26 | 2018-03-29 | The Regents Of The University Of California | Holey graphene framework composites for ultra-high rate energy storage and methods of preparing such composites |
Non-Patent Citations (1)
| Title |
|---|
| CONGJIE LV: "Electrospun Nb-doped LiNi0.4Co0.2Mn0.4O2nanobelts for lithium-ion batteries", 《INORGANIC CHEMISTRY FRONTIERS》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109817974A (en) * | 2019-03-27 | 2019-05-28 | 山东理工大学 | A kind of sodium ion nickel manganese magnesium iron quaternary positive electrode and preparation method thereof |
| CN109817974B (en) * | 2019-03-27 | 2022-05-03 | 山东理工大学 | Sodium ion nickel manganese magnesium iron quaternary positive electrode material and preparation method thereof |
| CN110931759A (en) * | 2019-12-19 | 2020-03-27 | 温州涂屋信息科技有限公司 | Al (aluminum)2O3Coated Co-W double-doped LiNiO2Lithium ion battery anode material and preparation method thereof |
| CN110931759B (en) * | 2019-12-19 | 2021-04-27 | 安徽正熹标王新能源有限公司 | Al (aluminum)2O3Coated Co-W double-doped LiNiO2Lithium ion battery anode material and preparation method thereof |
| CN115536080A (en) * | 2022-11-29 | 2022-12-30 | 瑞浦兰钧能源股份有限公司 | High-nickel positive electrode material and preparation method and application thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108767222B (en) | 2020-09-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105731409B (en) | A kind of molybdenum base positive electrode and preparation method thereof | |
| CN103280574A (en) | Lithium-enriched ternary anode material of power lithium-ion battery and preparation method of lithium-enriched ternary anode material | |
| CN108574089B (en) | Preparation method of hollow tubular lithium-rich manganese-based positive electrode material | |
| CN109192953A (en) | A kind of high magnification spherical LiFePO 4 carbon composite anode material and preparation method thereof | |
| CN108288711A (en) | A kind of quaternary lithium-ion battery positive electrode material and preparation method | |
| CN102214819B (en) | Method for manufacturing cobalt nickel lithium manganate oxide as gradient anode active material of lithium ion battery | |
| CN107069020A (en) | A kind of preparation method of lithium ion battery nickel doping vanadic anhydride nano-sheet positive electrode | |
| CN103094565B (en) | LiFePO 4/iron phosphide/carbon composite nano-fiber and its preparation method and application | |
| CN107732229A (en) | A kind of titanium doped lithium-rich manganese-based anode material for lithium-ion batteries and preparation method thereof | |
| CN108987711A (en) | A kind of spherical shape sodium-ion battery anode quaternary material and preparation method thereof | |
| CN103367724A (en) | Lithium iron phosphate cell material with core-shell structure, and preparation method thereof | |
| CN103956477A (en) | Preparation method of cathode material of lithium-rich ternary compound lithium ion battery | |
| CN108767222A (en) | A kind of preparation method of cation doping tertiary cathode material nanofiber | |
| CN104993116B (en) | A kind of self assembly anode material for lithium-ion batteries V2O5Preparation method | |
| CN108242538A (en) | A kind of preparation method of hollow sandwich type iron-based negative material | |
| CN108258217A (en) | A kind of preparation method and application of the nanofiber rich lithium manganese base solid solution positive electrode of Sr doping | |
| CN103441238A (en) | Mg-doped Li-rich anode material and preparation method for same | |
| CN107204426A (en) | A kind of cobalt nickel oxide manganses lithium/titanate composite anode material for lithium of zirconium doping vario-property | |
| CN105047898B (en) | A kind of twin spherical lithium ion secondary battery lithium-rich anode material and preparation method thereof | |
| CN105914364B (en) | Hollow microsphere structure ternary cathode material of lithium ion battery and preparation method thereof | |
| CN108163897A (en) | A kind of method for preparing sodium-ion battery positive material | |
| CN103413935A (en) | Mo-doped lithium-rich positive electrode material and preparation method thereof | |
| CN109802119A (en) | A kind of lithium-rich manganese-based Heterogeneous Composite positive electrode of one-dimensional spinelle stratiform and preparation method thereof | |
| CN106486664A (en) | Positive electrode material precursor preparation method and sintering method and lithium ion battery | |
| CN105489883A (en) | Preparing method for rapidly obtaining ternary anode material of lithium ion battery and anode material |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200904 Termination date: 20210525 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |