CN107799740A - Nickel cobalt aluminium anode material for lithium-ion batteries of neodymium doping and preparation method thereof - Google Patents

Nickel cobalt aluminium anode material for lithium-ion batteries of neodymium doping and preparation method thereof Download PDF

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CN107799740A
CN107799740A CN201710892819.7A CN201710892819A CN107799740A CN 107799740 A CN107799740 A CN 107799740A CN 201710892819 A CN201710892819 A CN 201710892819A CN 107799740 A CN107799740 A CN 107799740A
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nickel cobalt
lithium
cobalt aluminium
neodymium
composite precursor
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许开华
王家良
张云河
乐绪清
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Jingmen GEM New Material Co Ltd
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Jingmen GEM New Material Co Ltd
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • 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
    • 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
    • H01M4/52—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

Abstract

The invention discloses a kind of nickel cobalt aluminium anode material for lithium-ion batteries of neodymium doping, its molecular formula is LiaNixCoyAlzNdbO2；The invention also discloses the preparation method of the positive electrode.The present invention by the oxide of nickel cobalt aluminium monocrystalline composite precursor and nanoscale neodymium by carrying out ultrahigh speed premixing, again by the compound of nickel cobalt aluminium monocrystalline composite precursor and the oxide of nanoscale neodymium and common nickel cobalt aluminium polycrystalline composite precursor mixed at high speed, improve mixed effect, because monocrystalline composite precursor high mechanical strength, ultra-high-speed mixing can be used and be unlikely to broken, monocrystalline composite precursor can play a part of collision medium simultaneously, the oxide of nanoscale neodymium is fully broken up, is sufficiently mixed doped chemical and host element.

Description

Nickel cobalt aluminium anode material for lithium-ion batteries of neodymium doping and preparation method thereof
Technical field
The invention belongs to anode material for lithium-ion batteries manufacturing technology field, and in particular to a kind of nickel cobalt aluminium lithium of neodymium doping Ion battery positive electrode and preparation method thereof.
Background technology
Nickel cobalt aluminium ternary anode material for lithium-ion batteries is due to higher energy density and relatively simple system It is widely used in IT product and new-energy automobile field for technique.But simple nickel cobalt lithium aluminate (LNCA) is due to structure Stability is not good enough, is easy to make due to the deintercalation of Li ions and the change of Ni, Co, Al ionic valence condition in charge and discharge process Into collapsing for material structure, so as to cause greatly to endanger to the cycle life and security of material, regarding to the issue above typically Improved by the way of appropriate Nd ions are mixed.Due to Nd3+With Ni3+Valence state it is identical, the Nd of incorporation3+Occupy Ni3+ Position, in charging process, Ni can occur for Ni ions3+To Ni4+Transformation, and with volume contraction, if charging voltage mistake Height, depth of charge are excessive, and the volume contraction of material will be irreversible, and finally loses electro-chemical activity, and Nd3+In discharge and recharge Fixed price in journey, it is electrochemicaUy inert, the change of valence state does not occur in discharge and recharge, thus the change of volume does not occur yet, Skeleton, stable crystal structure, the cycle life and security performance for improving material can be played a part of.
As can be seen here, Nd incorporation has significant improvement result, but simultaneously because incorporation to the structural stability of material Be all non-electroactive material, mutually tackle material specific discharge capacity cause necessarily to influence.If incorporation is too high, put Capacitance will significantly reduce；If incorporation is insufficient, the stability of material cannot effectively improve.Therefore, doping member Element is to realize an important factor for specific discharge capacity reaches balance with stability with uniform mix of host element.It is and more in the prior art Using simple mixing oxides method incorporation in general Nd2O3, it is extremely difficult to doped chemical and is mixed with the uniform of host element.
The content of the invention
An object of the present invention is to provide a kind of nickel cobalt aluminium anode material for lithium-ion batteries of neodymium doping, mesh of the invention Two preparation methods for being to provide the positive electrode, solve doped chemical in the prior art and uneven ask mixed with host element Topic.
The technical solution adopted in the present invention is：
A kind of nickel cobalt aluminium anode material for lithium-ion batteries of neodymium doping, its molecular formula is LiaNixCoyAlzNdbO2, wherein, 1 ≤a≤1.2；0.3≤x≤0.98；0.01≤y≤0.6；0.001≤z≤0.1；B is 4/3-a/3-x-y-z, 0.00001≤b ≤0.03。
The present invention another technical scheme be：
The preparation method of the nickel cobalt aluminium anode material for lithium-ion batteries of neodymium doping, it comprises the following steps：
Step 1, nickel cobalt aluminium polycrystalline composite precursor, nickel cobalt aluminium monocrystalline composite precursor, nanometer neodymium source and lithium are weighed respectively Source；
Step 2, the nickel cobalt aluminium monocrystalline composite precursor weighed in the step 1 and nanometer neodymium source are subjected to ultrahigh speed mixed Close, the first mixture is made；
It is step 3, obtained first mixture in the step 2 and the nickel cobalt aluminium polycrystalline weighed in the step 1 is compound Presoma and lithium source carry out mixed at high speed, and the second mixture is made；
Step 4, obtained second mixture in the step 3 is encased in porcelain boat be calcined, that is, neodymium doping is made Nickel cobalt aluminium anode material for lithium-ion batteries.
The characteristics of another technical scheme of the invention, also resides in：
In the step 1, the nickel cobalt aluminium polycrystalline composite precursor and nickel cobalt aluminium monocrystalline composite precursor be nickel, cobalt, At least one of the composite oxides of aluminium, complex hydroxide, compound oxyhydroxide, wherein, nickel, cobalt, the mol ratio of aluminium For Ni：Co：Al=0.3-0.98:0.01-0.6:0.001-0.1.
In the step 1, the nanometer neodymium source is the oxide or hydroxide of nanoscale neodymium.
In the step 1, the mass ratio of the nickel cobalt aluminium polycrystalline composite precursor and nickel cobalt aluminium monocrystalline composite precursor is 2-20:1。
In the step 2, the ultra-high-speed mixing uses ternary material ultrahigh speed blender, and the rotating speed of ultra-high-speed mixing is 5500-20000r/min。
In the step 3, the lithium source is lithium carbonate or lithium hydroxide.
In the step 3, the mixed at high speed uses ternary material high speed blender, and the rotating speed of mixed at high speed is 1000- 10000r/min。
It is described to be roasted in the step 4：6h-36h is calcined at 600 DEG C -1200 DEG C.
Compared with prior art, the present invention is using the oxide of nanoscale neodymium as Nd sources, and the method for using mixed at high speed Solid phase mixing mixes Nd, and this method is simple to operation, and Nd incorporation easily accurately controls, and the Nd sources of nano-scale are beneficial to Nd Be uniformly distributed；The present invention by the oxide of nickel cobalt aluminium monocrystalline composite precursor and nanoscale neodymium by carrying out ultrahigh speed premix Close, then by the compound of nickel cobalt aluminium monocrystalline composite precursor and the oxide of nanoscale neodymium and common nickel cobalt aluminium polycrystalline compound precursor Body mixed at high speed, mixed effect is improved, can be unlikely using ultra-high-speed mixing because monocrystalline composite precursor high mechanical strength In broken, while monocrystalline composite precursor can play a part of collision medium, and the oxide of nanoscale neodymium is fully broken up, and make Doped chemical and host element are sufficiently mixed.
Embodiment
The present invention is described in further detail with reference to embodiment：
A kind of nickel cobalt aluminium anode material for lithium-ion batteries of neodymium doping, its molecular formula is LiaNixCoyAlzNdbO2, wherein, 1 ≤a≤1.2；0.3≤x≤0.98；0.01≤y≤0.6；0.001≤z≤0.1；B is 4/3-a/3-x-y-z, 0.00001≤b ≤0.03。
A kind of preparation method of the nickel cobalt aluminium anode material for lithium-ion batteries of above-mentioned neodymium doping, it comprises the following steps：
Step 1, nickel cobalt aluminium polycrystalline composite precursor, nickel cobalt aluminium monocrystalline composite precursor, nanometer neodymium source and lithium are weighed respectively Source；The nickel cobalt aluminium polycrystalline composite precursor and nickel cobalt aluminium monocrystalline composite precursor are the composite oxides, multiple of nickel, cobalt, aluminium At least one of hydroxide, compound oxyhydroxide are closed, wherein, nickel, cobalt, the mol ratio of aluminium are Ni：Co：Al=0.3- 0.98:0.01-0.6:0.001-0.1；The nanometer neodymium source is the oxide or hydroxide of nanoscale neodymium；The nickel cobalt aluminium is more The mass ratio of brilliant composite precursor and nickel cobalt aluminium monocrystalline composite precursor is 2-20:1；
The advantages of step 1, is：Using the oxide of nanoscale neodymium as Nd sources so that Nd incorporation easily accurately controls, The Nd sources of nano-scale are advantageous to being uniformly distributed for Nd；The monocrystalline composite precursor of use is especially suitable for ultra-high-speed mixing, and single Brilliant composite precursor is solid, ultra-high-speed mixing when do not break up, while monocrystalline composite precursor can play the work of collision medium With, mixed nanometer element is fully broken up, then again with remaining conventional polycrystalline composite precursor carry out mixed at high speed, reach more Good mixed effect.
Step 2, the nickel cobalt aluminium monocrystalline composite precursor weighed in the step 1 and nanometer neodymium source are subjected to ultrahigh speed mixed Close, the first mixture is made；The ultra-high-speed mixing uses ternary material ultrahigh speed blender, and the rotating speed of ultra-high-speed mixing is 5500-20000r/min；
In step 2, ultrahigh speed is carried out to monocrystalline composite precursor and nanometer neodymium source using ternary material high speed blender and mixed Close, because monocrystalline composite precursor high mechanical strength, ultra-high-speed mixing can be used and be unlikely to broken, while before monocrystalline is compound Collision medium can be played a part of by driving body, and the oxide of nanoscale neodymium is fully broken up, makes doped chemical and host element abundant Mixing.
It is step 3, obtained first mixture in the step 2 and the nickel cobalt aluminium polycrystalline weighed in the step 1 is compound Presoma and lithium source carry out mixed at high speed, and the second mixture is made；The lithium source is lithium carbonate or lithium hydroxide；The high speed is mixed Conjunction uses ternary material high speed blender, and the rotating speed of mixed at high speed is 1000-10000r/min；
Step 4, obtained second mixture in the step 3 is encased in porcelain boat be calcined at 600 DEG C -1200 DEG C 6h-36h, that is, the nickel cobalt aluminium anode material for lithium-ion batteries of neodymium doping is made.
Embodiment 1：
A kind of nickel cobalt aluminium anode material for lithium-ion batteries of neodymium doping, its molecular formula are Li1.2Ni0.3Co0.6Al0.001Nd0.029O2, wherein, 1≤a≤1.2；0.3≤x≤0.98；0.01≤y≤0.6；0.001≤z≤ 0.1；B is 4/3-a/3-x-y-z, 0.00001≤b≤0.03.
A kind of molecular formula is Li1.2Ni0.3Co0.6Al0.001Nd0.029O2Neodymium doping nickel cobalt aluminium lithium ion cell positive material The preparation method of material, it comprises the following steps：
Step 1, nickel cobalt aluminium polycrystalline composite precursor, nickel cobalt aluminium monocrystalline composite precursor, nanometer Nd are weighed respectively2O3And lithium Source；Wherein, nickel cobalt aluminium polycrystalline composite precursor and nickel cobalt aluminium monocrystalline composite precursor are the composite oxides, multiple of nickel, cobalt, aluminium At least one of hydroxide, compound oxyhydroxide are closed, nickel, cobalt, the mol ratio of aluminium are Ni：Co：Al=0.3:0.6: 0.001；The mass ratio of nickel cobalt aluminium polycrystalline composite precursor and nickel cobalt aluminium monocrystalline composite precursor is 2:1；
Step 2, the nickel cobalt aluminium monocrystalline composite precursor and nanometer Nd that will be weighed in the step 12O3Ultrahigh speed is carried out to mix Close, the first mixture is made；The ultra-high-speed mixing uses ternary material ultrahigh speed blender, and the rotating speed of ultra-high-speed mixing is 5500r/min；
It is step 3, obtained first mixture in the step 2 and the nickel cobalt aluminium polycrystalline weighed in the step 1 is compound Presoma and lithium source carry out mixed at high speed, and the second mixture is made；The lithium source is lithium carbonate or lithium hydroxide；The high speed is mixed Conjunction uses ternary material high speed blender, and the rotating speed of mixed at high speed is 1000r/min；
Step 4, obtained second mixture in step 3 is encased in porcelain boat at 600 DEG C it is calcined 36h, that is, neodymium is made The nickel cobalt aluminium anode material for lithium-ion batteries of doping.
Above-mentioned anode material for lithium-ion batteries, metal lithium sheet are that negative pole assembles button cell progress discharge and recharge contrast test, Using positive electrode made from the inventive method, first discharge specific capacity can reach 156mAh/g under 0.5C multiplying powers, 100 times Capability retention 97.8% after charge and discharge circulation, and common positive electrode first discharge specific capacity is 157mAh/g, 100 charge and discharges Capability retention 97.4% after circulation.
Embodiment 2：
A kind of nickel cobalt aluminium anode material for lithium-ion batteries of neodymium doping, its molecular formula is LiaNixCoyAlzNdbO2, wherein, 1 ≤a≤1.2；0.3≤x≤0.98；0.01≤y≤0.6；0.001≤z≤0.1；B is 4/3-a/3-x-y-z, 0.00001≤b ≤0.03。
A kind of molecular formula is LiNi0.98Co0.01Al0.008Nd0.002O2Neodymium doping nickel cobalt aluminium lithium ion cell positive material The preparation method of material, it comprises the following steps：
Step 1, nickel cobalt aluminium polycrystalline composite precursor, nickel cobalt aluminium monocrystalline composite precursor, nanometer Nd are weighed respectively2O3And lithium Source；Wherein, nickel cobalt aluminium polycrystalline composite precursor and nickel cobalt aluminium monocrystalline composite precursor are the composite oxides, multiple of nickel, cobalt, aluminium At least one of hydroxide, compound oxyhydroxide are closed, nickel, cobalt, the mol ratio of aluminium are Ni：Co：Al=0.98:0.01: 0.008；The mass ratio of nickel cobalt aluminium polycrystalline composite precursor and nickel cobalt aluminium monocrystalline composite precursor is 10:1；
Step 2, the nickel cobalt aluminium monocrystalline composite precursor and nanometer Nd that will be weighed in step 12O3Carry out ultra-high-speed mixing, system Obtain the first mixture；The ultra-high-speed mixing uses ternary material ultrahigh speed blender, and the rotating speed of ultra-high-speed mixing is 10000r/ min；
Step 3, the nickel cobalt aluminium polycrystalline compound precursor that will be weighed in obtained first mixture in step 2 and the step 1 Body and lithium source carry out mixed at high speed, and the second mixture is made；The lithium source is lithium carbonate or lithium hydroxide；The mixed at high speed is adopted With ternary material high speed blender, the rotating speed of mixed at high speed is 5000r/min；
Step 4, obtained second mixture in step 3 is encased in porcelain boat at 835 DEG C it is calcined 16h, that is, neodymium is made The nickel cobalt aluminium anode material for lithium-ion batteries of doping.
Above-mentioned anode material for lithium-ion batteries, metal lithium sheet are that negative pole assembles button cell progress discharge and recharge contrast test, Using positive electrode made from the inventive method, first discharge specific capacity can reach 203mAh/g under 0.5C multiplying powers, 100 times Capability retention 96.8% after charge and discharge circulation, and common positive electrode first discharge specific capacity is 206mAh/g, 100 charge and discharges Capability retention 94.4% after circulation.
Embodiment 3：
A kind of nickel cobalt aluminium anode material for lithium-ion batteries of neodymium doping, its molecular formula are Li1.06Ni0.85Co0.02Al0.1Nd0.01O2, wherein, 1≤a≤1.2；0.3≤x≤0.98；0.01≤y≤0.6；0.001≤z≤ 0.1；B is 4/3-a/3-x-y-z, 0.00001≤b≤0.03.
A kind of molecular formula is Li1.06Ni0.85Co0.02Al0.1Nd0.01O2Neodymium doping nickel cobalt aluminium lithium ion cell positive material The preparation method of material, it comprises the following steps：
Step 1, nickel cobalt aluminium polycrystalline composite precursor, nickel cobalt aluminium monocrystalline composite precursor, nanometer Nd are weighed respectively2O3And lithium Source；Wherein, nickel cobalt aluminium polycrystalline composite precursor and nickel cobalt aluminium monocrystalline composite precursor are the composite oxides, multiple of nickel, cobalt, aluminium At least one of hydroxide, compound oxyhydroxide are closed, nickel, cobalt, the mol ratio of aluminium are Ni：Co：Al=0.85:0.02: 0.1；The mass ratio of nickel cobalt aluminium polycrystalline composite precursor and nickel cobalt aluminium monocrystalline composite precursor is 20:1；
Step 2, the nickel cobalt aluminium monocrystalline composite precursor and nanometer Nd that will be weighed in step 12O3Carry out ultra-high-speed mixing, system Obtain the first mixture；The ultra-high-speed mixing uses ternary material ultrahigh speed blender, and the rotating speed of ultra-high-speed mixing is 20000r/ min；
Step 3, by obtained first mixture in step 2 and the nickel cobalt aluminium polycrystalline composite precursor that is weighed in step 1 and Lithium source carries out mixed at high speed, and the second mixture is made；Wherein, lithium source is lithium carbonate or lithium hydroxide；Mixed at high speed uses ternary Material high speed blender, the rotating speed of mixed at high speed is 10000r/min；
Step 4, obtained second mixture in step 3 is encased in porcelain boat at 1200 DEG C it is calcined 6h, that is, neodymium is made The nickel cobalt aluminium anode material for lithium-ion batteries of doping.
Above-mentioned anode material for lithium-ion batteries, metal lithium sheet are that negative pole assembles button cell progress discharge and recharge contrast test, Using positive electrode made from the inventive method, first discharge specific capacity can reach 177mAh/g under 0.5C multiplying powers, 100 times Capability retention 98.4% after charge and discharge circulation, and common positive electrode first discharge specific capacity is 180mAh/g, 100 charge and discharges Capability retention 96.9% after circulation.
The present invention is with nanometer Nd2O3Method solid phase mixing for Nd sources, and use mixed at high speed mixes Nd, this method Simple to operation, Nd incorporation easily accurately controls, Nd sources being uniformly distributed beneficial to Nd of nano-scale；What the present invention used Monocrystalline composite precursor is especially suitable for ultra-high-speed mixing, and monocrystalline composite precursor is solid, ultra-high-speed mixing when do not break up, together Shi Danjing composite precursors can play a part of collision medium, and mixed nanometer element is fully broken up, then again with remaining Conventional polycrystalline composite precursor carries out mixed at high speed, reaches more preferable mixed effect.

Claims (9)

1. the nickel cobalt aluminium anode material for lithium-ion batteries of a kind of neodymium doping, it is characterised in that its molecular formula is LiaNixCoyAlzNdbO2, wherein, 1≤a≤1.2；0.3≤x≤0.98；0.01≤y≤0.6；0.001≤z≤0.1；B is 4/ 3-a/3-x-y-z, 0.00001≤b≤0.03.
2. a kind of preparation method of the nickel cobalt aluminium anode material for lithium-ion batteries of the doping of neodymium as described in the appended claim 1, its feature It is, it comprises the following steps：
Step 1, nickel cobalt aluminium polycrystalline composite precursor, nickel cobalt aluminium monocrystalline composite precursor, nanometer neodymium source and lithium source are weighed respectively；
Step 2, the nickel cobalt aluminium monocrystalline composite precursor weighed in the step 1 and nanometer neodymium source are carried out to ultra-high-speed mixing, system Obtain the first mixture；
Step 3, the nickel cobalt aluminium polycrystalline compound precursor that will be weighed in obtained first mixture in the step 2 and the step 1 Body and lithium source carry out mixed at high speed, and the second mixture is made；
Step 4, obtained second mixture in the step 3 is encased in porcelain boat be calcined, that is, the nickel of neodymium doping is made Cobalt aluminium anode material for lithium-ion batteries.
3. a kind of preparation method of the nickel cobalt aluminium anode material for lithium-ion batteries of neodymium doping according to claim 2, it is special Sign is, in the step 1, the nickel cobalt aluminium polycrystalline composite precursor and nickel cobalt aluminium monocrystalline composite precursor are nickel, cobalt, aluminium Composite oxides, complex hydroxide, at least one of compound oxyhydroxide, wherein, nickel, cobalt, the mol ratio of aluminium are Ni：Co：Al=0.3-0.98:0.01-0.6:0.001-0.1.
4. a kind of preparation method of the nickel cobalt aluminium anode material for lithium-ion batteries of neodymium doping according to claim 2, it is special Sign is, in the step 1, the nanometer neodymium source is the oxide or hydroxide of nanoscale neodymium.
A kind of 5. preparation of the nickel cobalt aluminium anode material for lithium-ion batteries of neodymium doping according to any one of claim 2-4 Method, it is characterised in that in the step 1, the nickel cobalt aluminium polycrystalline composite precursor and nickel cobalt aluminium monocrystalline composite precursor Mass ratio is 2-20:1.
A kind of 6. preparation of the nickel cobalt aluminium anode material for lithium-ion batteries of neodymium doping according to any one of claim 2-4 Method, it is characterised in that in the step 2, the ultra-high-speed mixing uses ternary material ultrahigh speed blender, ultra-high-speed mixing Rotating speed be 5500-20000r/min.
A kind of 7. preparation of the nickel cobalt aluminium anode material for lithium-ion batteries of neodymium doping according to any one of claim 2-4 Method, it is characterised in that in the step 3, the lithium source is lithium carbonate or lithium hydroxide.
A kind of 8. preparation of the nickel cobalt aluminium anode material for lithium-ion batteries of neodymium doping according to any one of claim 2-4 Method, it is characterised in that in the step 3, the mixed at high speed uses ternary material high speed blender, the rotating speed of mixed at high speed For 1000-10000r/min.
A kind of 9. preparation of the nickel cobalt aluminium anode material for lithium-ion batteries of neodymium doping according to any one of claim 2-4 Method, it is characterised in that described to be roasted in the step 4：6h-36h is calcined at 600 DEG C -1200 DEG C.
CN201710892819.7A 2017-09-27 2017-09-27 Nickel cobalt aluminium anode material for lithium-ion batteries of neodymium doping and preparation method thereof Withdrawn CN107799740A (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114127016A (en) * 2019-06-28 2022-03-01 巴斯夫欧洲公司 Lithium nickel oxide particulate material, method for the production thereof and use thereof

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Application publication date: 20180313