CN109192959A - A kind of cobalt nickel lithium manganate ternary material and preparation method thereof loading graphene - Google Patents
A kind of cobalt nickel lithium manganate ternary material and preparation method thereof loading graphene Download PDFInfo
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Abstract
The present invention relates to a kind of cobalt nickel lithium manganate ternary materials and preparation method thereof for loading graphene, wherein, the raw material of cobalt nickel lithium manganate ternary material for loading graphene includes, nickel cobalt manganese hydroxide, lithium source, graphite oxide, wherein, the nickel cobalt manganese hydroxide and the molar ratio of lithium source are 1.02-1.12, and the mass values of the quality sum and the graphite oxide of the nickel cobalt manganese hydroxide and lithium source are 1.002-1.1.The lithium ion battery being prepared using the cobalt nickel lithium manganate ternary material of load graphene provided by the invention as positive electrode, cycle performance and specific discharge capacity are improved, thus more suitable for practical.
Description
Technical field
A kind of field of lithium ion battery of the present invention, more particularly to a kind of cobalt nickel lithium manganate ternary material for loading graphene
And preparation method thereof.
Background technique
With becoming increasingly conspicuous for energy problem and problem of environmental pollution, new energy industry has obtained national more and more weights
Depending on, lithium ion battery is high with its energy density, operating voltage is high, have extended cycle life, memory-less effect and environmentally protective etc. excellent
It puts and is concerned, positive electrode has decisive impact the performance of lithium ion battery, in particular, in recent years, with people
The increasingly raising of material requisite has issued higher demand, ternary lithium ion battery to its high-energy density, high rate capability etc.
Positive electrode, with its higher energy density, higher high rate performance and cycle performance are valued by people.
But ternary material also has intrinsic some disadvantages, and under high magnification, the cycle performance and specific discharge capacity of material
Decline, for these problems, the most common method is doping and coats to improve the chemical property under its high magnification.Graphene
Composite modified ternary material, people, which mostly use, directly adds graphene slurry into electrode slurry as conductive agent, to improve three
The high rate capability of first battery, this method is easy to operate, but since graphene can only adulterate in the slurry, cannot be with positive ternary
The closer contact of material, and cannot uniformly be full of in surrounding materials under normal conditions, cause additive effect smaller.
Summary of the invention
It is a primary object of the present invention to, provide it is a kind of load graphene cobalt nickel lithium manganate ternary material and its preparation side
Method, the technical problem to be solved is that the cycle performances and specific discharge capacity that improve lithium ion battery, thus more suitable for practical.
The object of the invention to solve the technical problems adopts the following technical solutions to realize.
A kind of cobalt nickel lithium manganate ternary material loading graphene proposed according to the present invention, the load graphene
The raw material of cobalt nickel lithium manganate ternary material includes nickel cobalt manganese hydroxide, lithium source, graphite oxide, wherein the nickel cobalt manganese hydrogen-oxygen
The molar ratio of compound and lithium source is 1.02-1.12, the quality sum and the oxidation of the nickel cobalt manganese hydroxide and lithium source
The mass values of graphite are 1.002-1.1.
The object of the invention to solve the technical problems also can be used following technical measures and further realize.
Preferably, the cobalt nickel lithium manganate ternary material of load graphene above-mentioned, wherein the nickel cobalt manganese hydroxide
For NixCoyMn1-x-y(OH)2, wherein 0.5≤x < 1,3-5 μm of partial size of the nickel cobalt manganese hydroxide.
Preferably, the cobalt nickel lithium manganate ternary material of load graphene above-mentioned, wherein the lithium source be LiOH,
LiNO3、Li2CO3One or more of combination.
Also the following technical solution is employed for the object of the invention to solve the technical problems to realize.
A kind of preparation method of cobalt nickel lithium manganate ternary material loading graphene proposed according to the present invention, including, it will
Nickel cobalt manganese hydroxide is mixed with lithium source, ball grinding stirring, obtains the first powder；First powder is subjected to the first calcining, is obtained
To cobalt nickel lithium manganate ternary material；The cobalt nickel lithium manganate ternary material, graphite oxide and solvent are mixed, ultrasound is mixed
Close slurry；The solvent and water in the mixed slurry are removed, the second powder is obtained；Second powder is subjected to the second calcining,
The cobalt nickel lithium manganate ternary material of the load graphene is obtained, before the cobalt nickel lithium manganate ternary material of the load graphene is
Described in any one of stating.
The object of the invention to solve the technical problems also can be used following technical measures and further realize.
Preferably, the preparation method of a kind of cobalt nickel lithium manganate ternary material loading graphene above-mentioned, wherein described
Ball grinding stirring is carried out using ball mill mixer, and the revolving speed of the ball mill mixer is 200-300r/min, Ball-milling Time 1-2h.
Preferably, the preparation method of a kind of cobalt nickel lithium manganate ternary material loading graphene above-mentioned, wherein described
First calcining carries out in Muffle furnace, and the calcination temperature of first calcining is 600-1000 DEG C, calcination time 6h-24h.
Preferably, the preparation method of a kind of cobalt nickel lithium manganate ternary material loading graphene above-mentioned, wherein described
Second calcining carries out in argon atmosphere, and the calcination temperature of second calcining is 500-800 DEG C, calcination time 1-4h.
Preferably, the preparation method of a kind of cobalt nickel lithium manganate ternary material loading graphene above-mentioned, wherein described
Solvent is ethyl alcohol.
Preferably, the preparation method of a kind of cobalt nickel lithium manganate ternary material loading graphene above-mentioned, wherein described
Ultrasound is intermittent ultrasound, stops 30s every 5min, the ultrasonic time is 8-12h.
Also the following technical solution is employed for the object of the invention to solve the technical problems to realize.
A kind of lithium ion battery proposed according to the present invention, the positive nickel cobalt by load graphene of the lithium ion battery
LiMn2O4 ternary material is prepared, and the cobalt nickel lithium manganate ternary material of the load graphene is any one of aforementioned institute
It states.
By above-mentioned technical proposal, a kind of cobalt nickel lithium manganate ternary material and its system loading graphene provided by the invention
Preparation Method at least has the advantage that
1, the cobalt nickel lithium manganate ternary material electric conductivity of present invention offer load graphene is good.
In the prior art, it is obtained by the method for directly adding graphene slurry in the slurry to cobalt nickel lithium manganate ternary material
To modified cobalt nickel lithium manganate ternary material, to improve the high rate capability of ternary battery, still, this method only mixes graphene
It is miscellaneous to make graphene in conjunction with nickle cobalt lithium manganate molecule in close in slurry, and the mixing of graphene and nickle cobalt lithium manganate is not
Uniformly, the effect that electric conductivity improves is unobvious.
In the cobalt nickel lithium manganate ternary material of load graphene provided by the invention, load has graphite on nickle cobalt lithium manganate
Alkene, and graphene is in conjunction with nickle cobalt lithium manganate molecule in close, wherein a part of graphene is on cobalt nickel lithium manganate ternary material surface
Attachment generates, and remainder graphene generates in the gap of cobalt nickel lithium manganate ternary material, has both been able to achieve graphene to ternary
The covered effect of material, and be able to achieve graphene and be sufficiently mixed as conductive agent and nickle cobalt lithium manganate, finally obtain molecule knot
The load that structure is stable, electric conductivity is good, high rate capability is good has the cobalt nickel lithium manganate ternary material of graphene.
2, invention also provides a kind of preparation methods of cobalt nickel lithium manganate ternary material for loading graphene.
The preparation method of ternary material provided by the invention, by ball milling, primary calcining, obtained space structure uniformly,
Stable cobalt nickel lithium manganate ternary material provides stable skeleton for the load of graphene；The nickle cobalt lithium manganate three that will be obtained
First material is mixed with graphite oxide, solvent, ultrasound, secondary clacining, makes to generate graphene-supported in nickle cobalt lithium manganate ternary material
On material, wherein a part of graphene is supported on nickle cobalt lithium manganate molecular surface, realizes stone in nickle cobalt lithium manganate Surface Creation
Cladding of the black alkene to nickle cobalt lithium manganate；Another part graphene generates in nickle cobalt lithium manganate gap, is supported on nickle cobalt lithium manganate
Between molecule, realize the doping of graphene and nickle cobalt lithium manganate, obtained molecular structure stabilized, electric conductivity it is good,
The good load of high rate capability has the cobalt nickel lithium manganate ternary material of graphene.Preparation method provided by the invention is simple, preparation
Process is easy to control, and can be used for mass production.
3, invention further provides a kind of good lithium ion batteries of high rate capability.
It is provided by the invention to load the system for thering is the cobalt nickel lithium manganate ternary material of graphene to can be used for lithium ion cell positive
Standby, the lithium ion battery being prepared has good high rate capability, and cycle charge-discharge under 3C multiplying power, after 100 weeks, capacity is protected
Holdup 92.8%.
The above description is only an overview of the technical scheme of the present invention, in order to better understand the technical means of the present invention,
And can be implemented in accordance with the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention and the accompanying drawings.
Detailed description of the invention
Fig. 1 is the cobalt nickel lithium manganate ternary material for the load graphene that the embodiment of the present invention 1 is prepared as positive material
The multiplying power discharging specific volume spirogram of the button half-cell of material.
Specific embodiment
It is of the invention to reach the technical means and efficacy that predetermined goal of the invention is taken further to illustrate, below in conjunction with
Attached drawing and preferred embodiment, to cobalt nickel lithium manganate ternary material proposed according to the present invention and preparation method thereof, specific implementation
Mode, structure, feature and its effect, detailed description is as follows.In the following description, different " embodiment " or " embodiment " refers to
Be not necessarily the same embodiment.In addition, the special characteristic, structure or feature in one or more embodiments can be by any suitable shapes
Formula combination.
The present invention provides a kind of cobalt nickel lithium manganate ternary material for loading graphene, the nickel cobalt manganese of the load graphene
The raw material of sour lithium ternary material includes nickel cobalt manganese hydroxide, lithium source, graphite oxide, wherein the nickel cobalt manganese hydroxide with
The molar ratio of lithium source is 1.02-1.12, the quality sum and the graphite oxide of the nickel cobalt manganese hydroxide and lithium source
Mass values are 1.002-1.1.
The present invention provides a kind of cobalt nickel lithium manganate ternary materials for loading graphene, wherein lithium source in raw material can be with
It is lithium source powder, the present invention improves the dosage of lithium source, and in the first calcination stage, lithium source has partial loss, and the present invention passes through
The dosage for properly increasing lithium source obtains that pattern is uniform, cobalt nickel lithium manganate ternary material of stable structure by the first calcining, is
Graphene provides uniform, stable load skeleton.
It should be noted that lithium source herein can be lithium source powder, the molal quantity of lithium source be in lithium source powder effectively at
Point (such as LiOH, LiNO3、Li2CO3) molal quantity.Graphite oxide provided by the invention can be through traditional Hummers
Method aoxidizes graphite oxide solution obtained, " quality sum of the nickel cobalt manganese hydroxide and lithium source and the graphite oxide
In mass values ", the quality of lithium source can be the quality of lithium source powder, and the quality of graphite oxide can be graphite oxide solution
Quality.In order to improve the electric conductivity of material, the mass ratio of the quality sum and graphite oxide of nickel cobalt manganese hydroxide and lithium source
Value not preferably less than 1.002；Meanwhile in order to further increase the cycle performance and specific discharge capacity of material under material high magnification, nickel
The mass values of the quality sum and graphite oxide of cobalt manganese hydroxide and lithium source should not be higher than 1.1.
Preferably, the nickel cobalt manganese hydroxide is NixCoyMn1-x-y(OH)2, wherein 0.5≤x < 1, the nickel cobalt manganese hydrogen
3-5 μm of the partial size of oxide.
In order to provide uniform, stable load skeleton to graphene, the present invention further defines nickle cobalt lithium manganate oxygen
The partial size of compound is 3-5 μm.Meanwhile being conducive to the subsequent uniformity mixed with graphite oxide, after the second calcining, make graphene
It can uniformly be supported on nickle cobalt lithium manganate.
Preferably, the lithium source is lithium salts, and lithium source is more preferably LiOH (lithium hydroxide), LiNO3(lithium nitrate),
Li2CO3The combination of one or more of (lithium carbonate).
Invention also provides a kind of preparation methods of cobalt nickel lithium manganate ternary material for loading graphene.
The preparation method of the cobalt nickel lithium manganate ternary material of load graphene provided by the invention includes: by nickel cobalt manganese hydrogen-oxygen
Compound is mixed with lithium source, ball grinding stirring, obtains the first powder；First powder is subjected to the first calcining, obtains nickel cobalt mangaic acid
Lithium ternary material；Calcined first powder, graphite oxide and solvent are mixed, ultrasound obtains mixed slurry；It removes described mixed
The solvent and water in slurry are closed, the second powder is obtained；Second powder is subjected to the second calcining, obtains the nickle cobalt lithium manganate
Ternary material, the cobalt nickel lithium manganate ternary material are described in aforementioned any one.
In the preparation method of the cobalt nickel lithium manganate ternary material of load graphene provided by the invention, first by nickel cobalt manganese hydrogen-oxygen
Compound and lithium source carry out the first calcining, obtain cobalt nickel lithium manganate ternary material.Preferably, the nickel cobalt manganese hydroxide and lithium source
Molar ratio be 1.02-1.12, the quality sum of the nickel cobalt manganese hydroxide and lithium source and the quality of the graphite oxide
Ratio is 1.002-1.1.Lithium source can be lithium source powder.The molal quantity of lithium source can be mole of effective component in lithium source powder
Number, the quality of lithium source can be the quality of lithium source powder.
Preferably, the nickel cobalt manganese hydroxide is NixCoyMn1-x-y(OH)2, wherein 0.5≤x < 1, the nickel cobalt manganese hydrogen
3-5 μm of the partial size of oxide.Preferably, the lithium source is LiOH, LiNO3、Li2CO3One or more of combination.
LiOH can be lithium hydroxide powder, LiNO3It can be nitric acid lithium powder, Li2CO3It can be lithium carbonate powder.
Preferably, the ball grinding stirring is carried out using ball mill mixer, and the revolving speed of the ball mill mixer is 200-300r/
Min, Ball-milling Time 1-2h.It is described for the uniformity of the skeleton of the cobalt nickel lithium manganate ternary material further increased
The partial size of first powder is 3-5 μm.Pattern is uniform, cobalt nickel lithium manganate ternary material of stable structure in order to further obtain, institute
The first calcining stated carries out in Muffle furnace, and the calcination temperature of first calcining is 600-1000 DEG C, calcination time 6h-
24h.The calcination temperature of first calcining should not be higher than 1000 DEG C, otherwise can destroy the molecular skeleton of cobalt nickel lithium manganate ternary material
Uniformity and stability.
Preferably, second calcining carries out in argon atmosphere, and the calcination temperature of second calcining is 500-800
DEG C, calcination time 1-4h.
The raw material of above-mentioned second calcining includes cobalt nickel lithium manganate ternary material and graphite oxide, and graphene is calcined second
It is generated in journey, obtains the cobalt nickel lithium manganate ternary material that load has graphene, wherein a part of graphene is in nickle cobalt lithium manganate table
Face generates, and is coated on nickle cobalt lithium manganate surface, another part graphene generates between nickle cobalt lithium manganate, is entrained in nickle cobalt lithium manganate
In, while having obtained the cobalt nickel lithium manganate ternary material of cladding and doped graphene.
It is generated to adulterate graphene in nickle cobalt lithium manganate surface cladding and gap, the calcination temperature of the second calcining is not
Preferably less than 500 DEG C, 800 DEG C should not be higher than, the calcination time of the second calcining is not preferably less than 1h, not preferably greater than 4h.
In the preparation method of the cobalt nickel lithium manganate ternary material of load graphene provided by the invention, by nickle cobalt lithium manganate three
First material is uniformly mixed with graphite oxide, then solvent is added into mixture solution, reduces the viscosity of mixture solution, further
Improve the uniformity that cobalt nickel lithium manganate ternary material is mixed with graphite oxide.Preferably, in order to make cobalt nickel lithium manganate ternary material
It is sufficiently mixed with graphite oxide, the solvent can be ethyl alcohol.Further, using ultrasonic treatment nickle cobalt lithium manganate ternary material
The mixing of material and graphite oxide is more uniform, stable.Preferably, the ultrasound is intermittent ultrasound, stops 30s every 5min,
The ultrasonic time is 8-12h.It should be noted that when ultrasonic time herein includes the ultrasound works in ultrasonication
Between and time out.
Preferably, it in described " removing the solvent and water in the mixed slurry ", can be carried out, be steamed by rotary evaporation
Hair falls extra solvent and water, and when solvent is ethyl alcohol, the temperature of rotary evaporation is 60-80 DEG C.After ultrasonic treatment, pass through
Rotary evaporation can evaporate the two-phase laminated flow in extra moisture and ethyl alcohol and drying process, reach uniformly mixed
Good result, be uniformly mixed nickle cobalt lithium manganate in the second powder with graphite oxide, to further increase subsequent graphene
The uniformity of load.
Embodiment 1
Present embodiments provide a kind of preparation method of cobalt nickel lithium manganate ternary material for loading graphene.
1. taking 3g Ni0.5Co0.2Mn0.3(OH)2Presoma (LITHIUM BATTERY) and 1.432g Li2CO3Mixing, is put into ball grinder
Ball milling is carried out, revolving speed 300r/min, ball milling 2h are uniformly mixed two kinds of materials；
2. the mixed-powder after ball milling is put into the calcining of Muffle furnace high temperature, temperature is 900 DEG C, calcines 12h, is made
LiNi0.5Co0.2Mn0.3O2(NCM523) material；
3. NCM523 material obtained in step 2 is mixed with 2.893g graphite oxide slurry, it is put into eggplant type bottle, is added
The dilution of 50ml ethanol solution, and be ultrasonically treated, every 5min interval pause 30s, circulation carries out 12h；
4. the good mixed solution of step 3 ultrasound is put on Rotary Evaporators, revolving operation is carried out, extra moisture is evaporated
And ethyl alcohol, obtain dry mix powder；
5. the mix powder that step 4 is obtained 500 DEG C in Ar atmosphere, calcines 3h, is taken out after Temperature fall, obtain height
The compound LiNi of the graphene of multiplying power0.5Co0.2Mn0.3O2(NCM523) material.
High magnification NCM523 material made from the present embodiment is made button half-cell, carries out high rate performance test, 0.2C,
0.5C, 1C, 2C, 3C, 5C, 7C, 9C, after charge-discharge test, specific discharge capacity as shown in Figure 1, respectively 177.96mAh/g,
171.97mAh/g、167.22mAh/g、160.77mAh/g、156.15mAh/g、149.30mAh/g、142.24mAh/g、
131.53mAh/g chooses 5C charging/1C and discharges, progress material circulation performance test, after 100 weeks loop tests, specific discharge capacity
For 146.83mAh/g, capacity retention ratio 88.26%, it can be seen that under the conditions of high magnification, material shows good multiplying power
Performance.
Embodiment 2
Present embodiments provide the preparation method of the cobalt nickel lithium manganate ternary material of another load graphene.
1. taking 2g Ni0.6Co0.2Mn0.2(OH)2Presoma (LITHIUM BATTERY) is mixed with 0.942g LiOH, is put into ball grinder
Ball milling is carried out, revolving speed 250r/min, ball milling 1h are uniformly mixed two kinds of materials；
2. the mixed-powder after ball milling is put into the calcining of Muffle furnace high temperature, temperature is 850 DEG C, calcines 16h, Li is made
Ni0.6Co0.2Mn0.2O2(NCM622) material；
3. NCM622 material obtained in step 2 is mixed with 2.625g graphite oxide slurry, it is put into eggplant type bottle, is added
The dilution of 50ml ethanol solution, and be ultrasonically treated, every 5min interval pause 30s, circulation carries out 12h；
4. the good mixed solution of step 3 ultrasound is put on Rotary Evaporators, revolving operation is carried out, extra moisture is evaporated
And ethyl alcohol, obtain dry mix powder；
5. the mixed-powder that step 4 is obtained 600 DEG C in Ar atmosphere, calcines 2h, is taken out after Temperature fall, obtain high power
The compound Li Ni of the graphene of rate0.6Co0.2Mn0.2O2(NCM622) material.
High magnification NCM622 material made from the present embodiment is made button half-cell, carries out high rate performance test, 0.2C,
0.5C, 1C, 2C, 3C, 5C, 7C, 9C, after charge-discharge test, specific discharge capacity, respectively 180.12mAh/g, 176.35mAh/g,
165.32mAh/g, 162.45mAh/g, 160.22mAh/g, 152.44mAh/g, 145.28mAh/g, 136.26mAh/g choose
5C charging/1C electric discharge, carries out material circulation performance test, after 100 weeks, specific discharge capacity 150.35mAh/g, and capacity retention ratio
It is 87.94%, it can be seen that under the conditions of high magnification, material shows good high rate performance.
In the above-described embodiments, it all emphasizes particularly on different fields to the description of each embodiment, there is no the portion being described in detail in some embodiment
Point, reference can be made to the related descriptions of other embodiments.
It is understood that the correlated characteristic in above-mentioned apparatus can be referred to mutually.In addition, in above-described embodiment " the
One ", " second " etc. is and not represent the superiority and inferiority of each embodiment for distinguishing each embodiment.
In the instructions provided here, numerous specific details are set forth.It is to be appreciated, however, that implementation of the invention
Example can be practiced without these specific details.In some instances, well known structure and skill is not been shown in detail
Art, so as not to obscure the understanding of this specification.
Heretofore described numberical range includes numerical value all within the scope of this, and including any two within the scope of this
The value range of numerical value composition.For example, " calcination temperature of first calcining is 600-1000 DEG C ", this numberical range includes 600-
All numerical value between 1000, and including any two numerical value within the scope of this (such as: 700,800) form value range
(700-800)；The different numerical value of the same index occurred in all embodiments of the invention, can in any combination, compositing range value.
Technical characteristic in the claims in the present invention and/or specification can be combined, and a combination thereof mode is not limited to weigh
The combination obtained in benefit requirement by adduction relationship.It is combined by the technical characteristic in claim and/or specification
The technical solution and protection scope of the present invention arrived.
The above described is only a preferred embodiment of the present invention, be not intended to limit the present invention in any form, according to
According to technical spirit any simple modification, equivalent change and modification to the above embodiments of the invention, this hair is still fallen within
In the range of bright technical solution.
Claims (10)
1. a kind of cobalt nickel lithium manganate ternary material for loading graphene, it is characterised in that:
The raw material of cobalt nickel lithium manganate ternary material of the load graphene includes,
Nickel cobalt manganese hydroxide, lithium source, graphite oxide,
Wherein, the nickel cobalt manganese hydroxide and the molar ratio of lithium source are 1.02-1.12,
The mass values of the quality sum of the nickel cobalt manganese hydroxide and lithium source and the graphite oxide are 1.002-1.1.
2. the cobalt nickel lithium manganate ternary material of load graphene according to claim 1, it is characterised in that:
The nickel cobalt manganese hydroxide is NixCoyMn1-x-y(OH)2, wherein 0.5≤x < 1,
3-5 μm of partial size of the nickel cobalt manganese hydroxide.
3. the cobalt nickel lithium manganate ternary material of load graphene according to claim 1, it is characterised in that:
The lithium source is LiOH, LiNO3、Li2CO3One or more of combination.
4. a kind of preparation method for the cobalt nickel lithium manganate ternary material for loading graphene, it is characterised in that: including,
Nickel cobalt manganese hydroxide is mixed with lithium source, ball grinding stirring obtains the first powder；
First powder is subjected to the first calcining, obtains cobalt nickel lithium manganate ternary material；
The cobalt nickel lithium manganate ternary material, graphite oxide and solvent are mixed, ultrasound obtains mixed slurry；
The solvent and water in the mixed slurry are removed, the second powder is obtained；
Second powder is subjected to the second calcining, obtains the cobalt nickel lithium manganate ternary material of the load graphene, it is described negative
The cobalt nickel lithium manganate ternary material for carrying graphene is described in any one of claim 1-3.
5. a kind of preparation method of cobalt nickel lithium manganate ternary material for loading graphene according to claim 4, feature
It is:
The ball grinding stirring is carried out using ball mill mixer, when the revolving speed of the ball mill mixer is 200-300r/min, ball milling
Between be 1-2h.
6. a kind of preparation method of cobalt nickel lithium manganate ternary material for loading graphene according to claim 4, feature
It is:
First calcining carries out in Muffle furnace, and the calcination temperature of first calcining is 600-1000 DEG C, calcination time
For 6h-24h.
7. a kind of preparation method of cobalt nickel lithium manganate ternary material for loading graphene according to claim 4, feature
It is:
Second calcining carries out in argon atmosphere, and the calcination temperature of second calcining is 500-800 DEG C, calcination time
For 1-4h.
8. a kind of preparation method of cobalt nickel lithium manganate ternary material for loading graphene according to claim 4, feature
It is:
The solvent is ethyl alcohol.
9. a kind of preparation method of cobalt nickel lithium manganate ternary material for loading graphene according to claim 4, feature
It is:
The ultrasound is intermittent ultrasound, stops 30s every 5min, the ultrasonic time is 8-12h.
10. a kind of lithium ion battery, it is characterised in that:
The anode of the lithium ion battery is prepared by the cobalt nickel lithium manganate ternary material of load graphene, the load stone
The cobalt nickel lithium manganate ternary material of black alkene is described in any one of claim 1-3.
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