CN106299312B - A kind of method of template preparation anode of lithium ion battery composite material - Google Patents
A kind of method of template preparation anode of lithium ion battery composite material Download PDFInfo
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Abstract
The invention belongs to technical field of lithium ion, more particularly to a kind of method of template preparation anode of lithium ion battery composite material, it includes at least following steps: NaCl, artificial graphite, SiO particle and carbon source being added in water, is evaporated after mixing evenly, broken mixing is carried out again, obtains mixture；Mixture is placed in carbide furnace, carbonization treatment is carried out under inert gas shielding atmosphere, obtains carbonization treatment object; then carbonization treatment object is mixed with nitrogenous compound; high-temperature ammonolysis processing is carried out under inert gas shielding atmosphere again, is then soaked in water and removes NaCl, is dried.The present invention has the structure of multiple holes using the anode of lithium ion battery composite material of NaCl template preparation, this porous composite material can alleviate the volume expansion problem of the SiO in process of intercalation well, to preferably improve the cyclical stability of silicon substrate lithium ion battery anode material under the premise of keeping higher battery capacity.
Description
Technical field
The invention belongs to technical field of lithium ion more particularly to a kind of template preparation anode of lithium ion battery are compound
The method of material.
Background technique
All the time, there is good bulk effect because aoxidizing sub- silicon (SiO), people attempt as lithium ion battery
Composite material, it is considered that, SiO cathode Mechanism of electrochemical behaviors of anhydrous is as follows:
SiO+Li→Li2O+Si(1)
SiO+Li→Li4SiO4+Si(2)
Si+Li→Li4.4Si(3)
When SiO is as composite material, initial coulomb efficiency is low, is primarily due to first step reaction (formula 1) and (formula 2) and is
Irreversible reaction, the Li of generation2O、Li4SiO4And the oxide of silicon contacts the reactions such as decomposition and condensation with organic electrolyte and disappears
Consume more lithium ion.
The Li of generation2O、Li4SiO4It is precipitated with back bone network, acts as a kind of good buffer matrix in situ, effectively press down
The bulk effect of active metal silicon particle in charge and discharge process is made；The two also plays support and the aggregation of dispersed metal silicon simultaneously
The effect of area's particle avoids agglomeration of small and dispersed metallic silicon accumulation regions particle during later period charge and discharge cycles,
It is advantageous to cyclical stability.This also exactly aoxidizes sub- silicon (SiO) material and is had an optimistic view of by people always, most becomes fastly in realistic meaning
The next-generation most important reason of composite material.
In addition, SiO material electric conductivity is very poor, the conductivity order of magnitude (< 10-12S/cm) within the scope of insulator.
In view of this, being used it is necessory to provide a kind of method of template preparation anode of lithium ion battery composite material
The anode composite material coulombic efficiency for the first time with higher of this method preparation, preferable cycle performance and lower volume are swollen
It is swollen.
Summary of the invention
It is an object of the invention to: in view of the deficiencies of the prior art, and a kind of template is provided and prepares lithium ion battery sun
The method of pole composite material, the anode composite material coulombic efficiency for the first time with higher prepared using this method, is preferably followed
Ring performance and lower volume expansion.
In order to achieve the above object, the present invention adopts the following technical scheme:
The method that template prepares anode of lithium ion battery composite material includes at least following steps:
NaCl, artificial graphite, SiO particle and carbon source, and NaCl, artificial graphite, SiO is added in the first step in water
Grain and the mass ratio of carbon source are followed successively by (0.5-5): (1-10): (0.1-3): (0.3-4) is evaporated, then carry out brokenly after mixing evenly
Broken mixing, obtains mixture；
Mixture is placed in carbide furnace by second step, is carried out at 500 DEG C -1200 DEG C under inert gas shielding atmosphere
Carbonization treatment obtains carbonization treatment object, then mixes carbonization treatment object with nitrogenous compound, then at 300 DEG C -1200 DEG C
High-temperature ammonolysis processing is carried out under inert gas shielding atmosphere, is then soaked in water and is removed NaCl, is obtained after drying with hole knot
Structure and the SiO/ with carbon coating layer of nitridation lack layer graphite/artificial graphite anode's composite material or nitridation with hole configurations
And SiO/ graphene/artificial graphite anode's composite material with carbon coating layer.The temperature of carbonization treatment is preferably 600 DEG C-
1000 DEG C, this is because carburizing temperature is low, carbon graphite degree is small, and conductivity is lower, and carburizing temperature height is then conducive to generate high
Conductivity carbon.
A kind of improvement of method as template of the present invention preparation anode of lithium ion battery composite material, the carbon source are
At least one of sucrose, glucose, fructose, powder-beta-dextrin, lactose, citric acid and starch, the dissolubility of these carbon sources in water
Preferably, it may be implemented uniformly to coat.
A kind of improvement of method as template of the present invention preparation anode of lithium ion battery composite material, it is described broken mixed
The method of conjunction is ball milling, grinding, roll mill, mechanical mill, mechanical fusion or spray drying.
A kind of improvement of method as template of the present invention preparation anode of lithium ion battery composite material, described SiO
The partial size of grain is 0.1 μm -50 μm, and the partial size of the artificial graphite is 0.1 μm -15 μm.
A kind of improvement of method as template of the present invention preparation anode of lithium ion battery composite material, the indifferent gas
Body is nitrogen, argon gas or helium.
A kind of improvement of method as template of the present invention preparation anode of lithium ion battery composite material, the nitrogen
Conjunction object is at least one of urea, melamine, polypyrrole, polyaniline, N-Methyl pyrrolidone and azo dyes.
A kind of improvement of method as template of the present invention preparation anode of lithium ion battery composite material, carbonization treatment object
The mode mixed with nitrogenous compound is to adsorb in aqueous solution, i.e., nitrogenous compound is dissolved in the water, obtains nitrogenous compound
Aqueous solution, then carbonization treatment object is added in the aqueous solution of the nitrogenous compound and carries out adsorption, absorption complete after
It takes out the carbonization treatment object and the carbonization treatment object is dried.
A kind of improvement of method as template of the present invention preparation anode of lithium ion battery composite material, nitrogenous compound
Aqueous solution in, the concentration of nitrogenous compound is 0.05mol/L-1mol/L；It is applied with ultrasonic wave disturbance in adsorption process or stirs
It mixes, drying temperature is 40 DEG C -100 DEG C, and dry duration is 30min-5h, and the time of adsorption took is 1min-3h.
A kind of improvement of method as template of the present invention preparation anode of lithium ion battery composite material, carbonization treatment object
The mode mixed with nitrogenous compound is to be mutually mixed carbonization treatment object and nitrogenous compound powder in a manner of solid.
A kind of improvement of method as template of the present invention preparation anode of lithium ion battery composite material, solid mixing
Method is grinding, ball milling or stirring, and the mass ratio of carbonization treatment object and nitrogenous compound powder is (3-30): 1.
A kind of improvement of the method for anode of lithium ion battery composite material is prepared as template of the present invention, is stirred in the first step
The method mixed is ultrasonic agitation, magnetic agitation or stirring paddle stirring.
A kind of improvement of the method for anode of lithium ion battery composite material is prepared as template of the present invention, is steamed in the first step
Dry temperature is 80 DEG C -120 DEG C.
A kind of improvement of the method for anode of lithium ion battery composite material is prepared as template of the present invention, is dried in second step
Dry temperature is 80 DEG C -120 DEG C.
A kind of improvement of method as template of the present invention preparation anode of lithium ion battery composite material, carbon coating layer
With a thickness of 20nm-5 μm.Carbon coating layer is too thin, and the absolute volume effect of the composite material is larger, and active material structure is easily broken
It is bad, suitably increase carbon content, can reduce the absolute volume effect of the composite material, is conducive to increase the long-term of composite material
Cyclical stability.Carbon coating layer is too thick and insertion of the lithium ion in Si can be hindered to deviate from and reduce its reversible capacity, this is
Because carbon specific capacity itself is low, the reversible capacity of composite material will be directly reduced, while the too thick flexibility of carbon coating layer can reduce,
It is easy to cause carbon coating layer to rupture instead and leads to SiOxThe dusting in cyclic process of/carbon composite.
Compared with the existing technology, the present invention at least has the following beneficial effects:
First, the present invention has the knot of multiple holes using the anode of lithium ion battery composite material of NaCl template preparation
Structure, this porous composite material can alleviate the volume expansion problem of the SiO in process of intercalation well, this is because porous
Volume change mentions caused by the insertion or abjection of lithium ion and silicon that structure occurs during being charged and discharged for battery
Enough spaces are supplied, to preferably improve silicon substrate anode of lithium ion battery material under the premise of keeping higher battery capacity
The cyclical stability of material can meet the requirement of high performance lithium ion battery anode material.
Second, the electron conduction of the material can be improved in the carbon coated on the surface of SiO and artificial graphite, this be because
For, after carbon coated, electronics can pass freely through active material particle surface layer, and entire electrode forms good conductive network, from
And reduce intergranular interface impedance；
The chemistry and electrochemical stability of material can be improved in third, the carbon coated on the surface of SiO and artificial graphite,
This is because LiPF in electrolyte6It is very sensitive to meet water, even if touching the water of trace, LiPF6Also it easily hydrolyzes, generates HF,
To corrode silicon face, and carbon has excellent chemical stability, will not be corroded by HF, silicon particle is after carbon coating, the carbon-coating
Corrosion of the HF to silicon particle surface is inhibited, in addition, carbon electrochemical window mouth width in organic electrolyte, so it is only in current potential
There is electro-chemical activity in low-down situation, and will not be oxidized under high voltages.
4th, carbon coating not only increases the electric conductivity of active material, while also alleviating active material as elastic layer and existing
Volume expansion in process of intercalation stabilizes the structure of material.
5th, carbon coating can also significantly improve the coulombic efficiency for the first time of SiO material and capacity plays；
6th, during artificial graphite and SiO particle are sintered, graphite can be formed between the mixed interface of the two
Alkene or few layer graphite improve the structural strength of entire composite material, prevent the composite material to improve the bond strength of the two
The problem of recurring structure collapses during charge and discharge.
7th, carbon nitride layer can be formed in nitridation process, which can be improved the first charge-discharge of battery
Coulombic efficiency, and improve cycle performance.
8th, by aoxidizing the mixing of sub- silicon and artificial graphite, the advantages of both can integrating, the shortcomings that both reductions,
Again by effectively coating, the available height of coulombic efficiency for the first time, good cycle, capacity are high, power is high and expansion is lesser
Anode of lithium ion battery composite material.
Specific embodiment
The present invention provides a kind of preparation methods of lithium ion battery anode material.
Embodiment 1
The method of template preparation anode of lithium ion battery composite material provided in this embodiment, includes at least following step
It is rapid:
NaCl, the artificial graphite that average grain diameter is 3 μm, the SiO particle that average grain diameter is 10 μm is added in the first step in water
And sucrose, and NaCl, artificial graphite, SiO particle and sucrose mass ratio be followed successively by 1:5:1:1, ultrasonic agitation uniformly after
It is evaporated at 100 DEG C, then carries out ball milling, obtain mixture；
Mixture is placed in carbide furnace by second step, is carried out carbonization treatment at 1000 DEG C under nitrogen protection atmosphere, is obtained
To carbonization treatment object, then carbonization treatment object is mixed with urea, specifically, urea is dissolved in the water, obtaining concentration is
Then carbonization treatment object is added in the urea liquid and carries out adsorption by the urea liquid of 0.3mol/L, adsorption took when
Between be 30min, ultrasonic wave disturbance is applied in entire adsorption process, absorption takes out the carbonization treatment object and to the carbon after completing
Change processed material to be dried, drying temperature is 60 DEG C, and dry duration is 1h, to remove moisture, then at 800 DEG C
High-temperature ammonolysis processing is carried out under nitrogen protection atmosphere, after being cooled to room temperature, is soaked in water and removes NaCl, after drying at 100 DEG C
The SiO/ with hole configurations and with carbon coating layer nitrogenized lacks layer graphite/artificial graphite anode's composite material, carbon packet
Coating with a thickness of 20nm-5 μm.
Embodiment 2
The method of template preparation anode of lithium ion battery composite material provided in this embodiment, includes at least following step
It is rapid:
NaCl, the artificial graphite that average grain diameter is 8 μm, the SiO particle that average grain diameter is 20 μm is added in the first step in water
And glucose, and NaCl, artificial graphite, SiO particle and glucose mass ratio be followed successively by 4:8:1.2:0.8, magnetic agitation
It is evaporated, then is ground at 90 DEG C after uniformly, obtain mixture；
Mixture is placed in carbide furnace by second step, is protected in argon gas and is carried out carbonization treatment at 800 DEG C under atmosphere, obtains
To carbonization treatment object, carbonization treatment object is mixed with melamine then, specifically, melamine is dissolved in the water, is obtained
Then progress surface suction in the melamine solution is added in carbonization treatment object by the melamine solution for being 0.1mol/L to concentration
Attached, the time of adsorption took is 1h, and stirring is applied in entire adsorption process, and absorption takes out the carbonization treatment object simultaneously after completing
The carbonization treatment object is dried, drying temperature is 80 DEG C, and dry duration is then 40min is existed with removing moisture
High-temperature ammonolysis processing is carried out under argon gas atmosphere at 900 DEG C, after being cooled to room temperature, is soaked in water and is removed NaCl, in 110 DEG C
Nitrogenized after lower drying with hole configurations and with carbon coating layer SiO/ graphene/artificial graphite anode's composite wood
Material, carbon coating layer with a thickness of 20nm-5 μm.
Embodiment 3
The method of template preparation anode of lithium ion battery composite material provided in this embodiment, includes at least following step
It is rapid:
NaCl, the artificial graphite that average grain diameter is 12 μm, SiO that average grain diameter is 30 μm is added in the first step in water
Grain and fructose, and NaCl, artificial graphite, SiO particle and fructose mass ratio be followed successively by 1.5:7:2.2:3.5, agitating paddle stirs
It is evaporated at 110 DEG C after mixing uniformly, then carries out roll mill, obtain mixture；
Mixture is placed in carbide furnace by second step, is protected in helium and is carried out carbonization treatment at 700 DEG C under atmosphere, obtains
To carbonization treatment object, then carbonization treatment object is mixed with N-Methyl pyrrolidone, specifically, N-Methyl pyrrolidone is molten
In Xie Yushui, the N-Methyl pyrrolidone solution that concentration is 0.9mol/L is obtained, the N- methyl then is added in carbonization treatment object
Adsorption is carried out in pyrrolidone solution, the time of adsorption took is 10min, is applied with ultrasonic wave in entire adsorption process and disturbs
Dynamic, absorption takes out the carbonization treatment object and the carbonization treatment object is dried after completing, and drying temperature is 70 DEG C, and drying is held
The continuous time is 40min, to remove moisture, then carries out high-temperature ammonolysis processing in the case where the helium at 1000 DEG C protects atmosphere, cold
But NaCl is removed to being soaked in water after room temperature, what is nitrogenized after drying at 90 DEG C has hole configurations and with carbon coating layer
SiO/ lack layer graphite/artificial graphite anode's composite material, carbon coating layer with a thickness of 20nm-5 μm.
Embodiment 4
The method of template preparation anode of lithium ion battery composite material provided in this embodiment, includes at least following step
It is rapid:
NaCl, the artificial graphite that average grain diameter is 5 μm, the SiO particle that average grain diameter is 15 μm is added in the first step in water
And powder-beta-dextrin, and NaCl, artificial graphite, SiO particle and powder-beta-dextrin mass ratio be followed successively by 2.5:7.5:1.6:2.3, ultrasound
It is evaporated at 105 DEG C after mixing evenly, then carries out mechanical mill, obtain mixture；
Mixture is placed in carbide furnace by second step, is carried out carbonization treatment at 1100 DEG C under nitrogen protection atmosphere, is obtained
To carbonization treatment object, carbonization treatment object is mixed with azo dyes then, specifically, azo dyes is dissolved Yu Shuizhong, is obtained
Then progress surface suction in the azo dyes solution is added in carbonization treatment object by the azo dyes solution for being 0.5mol/L to concentration
Attached, the time of adsorption took is 2h, and ultrasonic wave disturbance is applied in entire adsorption process, and absorption is taken out at the carbonization after completing
Reason object is simultaneously dried the carbonization treatment object, and drying temperature is 90 DEG C, and dry duration is 2h, to remove moisture, so
High-temperature ammonolysis processing is carried out under the nitrogen protection atmosphere at 850 DEG C afterwards, after being cooled to room temperature, is soaked in water and removes NaCl, in
SiO/ graphene/the artificial graphite anode with hole configurations and with carbon coating layer nitrogenized after drying at 95 DEG C is compound
Material, carbon coating layer with a thickness of 20nm-5 μm.
Embodiment 5
The method of template preparation anode of lithium ion battery composite material provided in this embodiment, includes at least following step
It is rapid:
NaCl, the artificial graphite that average grain diameter is 2 μm, the SiO particle that average grain diameter is 35 μm is added in the first step in water
And lactose, and NaCl, artificial graphite, SiO particle and lactose mass ratio be followed successively by 1.3:8.3:0.9:1.8, agitating paddle stirs
It is evaporated at 85 DEG C after mixing uniformly, then carries out mechanical fusion, obtain mixture；
Mixture is placed in carbide furnace by second step, is protected in argon gas and is carried out carbonization treatment at 750 DEG C under atmosphere, obtains
To carbonization treatment object, then carbonization treatment object is mixed with melamine, specifically, by carbonization treatment object and melamine powder
End is mutually mixed in a manner of solid, i.e., is uniformly mixed in carbonization treatment object and melamine powder by way of stirring
Together, wherein carbonization treatment object and the mass ratio of melamine powder are 10:1.Then the nitrogen protection atmosphere at 600 DEG C
Lower progress high-temperature ammonolysis processing, after being cooled to room temperature, is soaked in water and removes NaCl, and what is nitrogenized after drying at 85 DEG C has
Hole configurations and with carbon coating layer SiO/ graphene/artificial graphite anode's composite material, carbon coating layer with a thickness of 20nm-
5μm。
Embodiment 6
The method of template preparation anode of lithium ion battery composite material provided in this embodiment, includes at least following step
It is rapid:
NaCl, the artificial graphite that average grain diameter is 13 μm, SiO that average grain diameter is 25 μm is added in the first step in water
Grain and citric acid, and NaCl, artificial graphite, SiO particle and citric acid mass ratio be followed successively by 2.3:5.5:2.6:0.5, surpass
Sound is evaporated at 115 DEG C after mixing evenly, then is ground, and mixture is obtained；
Mixture is placed in carbide furnace by second step, is protected in helium and is carbonized at 500 DEG C -1200 DEG C under atmosphere
Processing, obtains carbonization treatment object, then mixes carbonization treatment object with polypyrrole, specifically, by carbonization treatment object and poly- pyrrole
It coughs up powder to be mutually mixed in a manner of solid, i.e., equably mixes carbonization treatment object by way of ball milling with polypyrrole powder
Together, wherein the mass ratio of carbonization treatment object and polypyrrole powder is 20:1.Then the nitrogen protection atmosphere at 750 DEG C
Lower progress high-temperature ammonolysis processing, is soaked in water after being cooled to room temperature and removes NaCl, and what is nitrogenized after drying at 115 DEG C has
Hole configurations and SiO/ with carbon coating layer lacks layer graphite/artificial graphite anode's composite material, carbon coating layer with a thickness of
20nm-2μm。
Comparative example 1
The material that this comparative example provides is commercially available synthetic graphite particles, and average grain diameter is 10 μm.
Comparative example 2
The material that this comparative example provides is commercially available SiO particle, and average grain diameter is 30 μm.
By embodiment 1-6 and the anode material of Comparative Examples 1 and 2 respectively with butadiene-styrene rubber, sodium carboxymethylcellulose and superconduction carbon
It is added in distilled water, is uniformly mixing to obtain anode slurry；Then anode slurry is obtained into anode coated in anode collector
Piece, number consecutively are S1-S6 and D1, D2.
Lithium-ion electric is assembled into cathode sheets, isolation film and electrolyte respectively by numbering for the anode strip of S1-S6 and D1, D2
Pond, and number consecutively is B1-B6 and C1, C2.
To number be B1-B6 and the lithium ion battery of C1, C2 are tested as follows:
(1), coulombic efficiency is tested for the first time: first being discharged with the electric current of 0.2mA, is discharged to 0.005V, allows anode material
Embedding lithium after standing 10min, then with the electric current of 0.2mA charges to 2.000V, tests the discharging efficiency for the first time of graphite, acquired results
It is shown in Table 1.
(2), cell expansion is tested: before chemical conversion, first test No. is the initial thickness of the lithium ion battery of B1-B6 and C1, C2
Degree, is denoted as d0, then will number as the charge and discharge at 25 ± 2 DEG C of the lithium ion battery of B1-B6 and C1, C2, rate of charge is
0.5C, charge cutoff voltage 4.20V, cut-off current 0.05C；Discharge current is 0.5C, discharge cut-off voltage 3.0V；Note
Cell thickness d after recording 200 circulations200, thickness swelling after then calculating circulating battery 200 times again.Thickness swelling
Calculation formula is (d200-d0)/d0, acquired results are shown in Table 1.
(3), cycle performance of battery is tested: will number as the battery of B1-B6 and C1, C2 the filling with 0.5C/1C at 25 DEG C
Discharge-rate carries out charge and discharge cycles test, the capacity retention ratio after record circulation 200 times, and acquired results are shown in Table 1.
Table 1: number is B1-B6 and the performance test results of the battery of C1, C2.
From table 1 it follows that the anode material coulombic efficiency for the first time with higher prepared using method of the invention,
Preferable cycle performance and lower volume expansion.
The announcement and elaboration of book according to the above description, those skilled in the art in the invention can also be to above-mentioned embodiment party
Formula is changed and is modified.Therefore, the invention is not limited to the specific embodiments disclosed and described above, to of the invention
Some equivalent modifications and change should also be as in scope of protection of the claims of the invention.In addition, although making in this specification
With some specific terms, these terms are merely for convenience of description, does not limit the present invention in any way.
Claims (10)
1. the method for template preparation anode of lithium ion battery composite material, which is characterized in that include at least following steps:
The first step, is added NaCl, artificial graphite, SiO particle and carbon source in water, and NaCl, artificial graphite, SiO particle and
The mass ratio of carbon source is followed successively by (0.5-5): (1-10): (0.1-3): (0.3-4) is evaporated after mixing evenly, then is carried out broken mixed
It closes, obtains mixture；
Mixture is placed in carbide furnace by second step, is carbonized at 500 DEG C -1200 DEG C under inert gas shielding atmosphere
Processing, obtains carbonization treatment object, then mixes carbonization treatment object with nitrogenous compound, then the inertia at 300 DEG C -1200 DEG C
Carry out high-temperature ammonolysis processing under gas shield atmosphere, be then soaked in water and remove NaCl, obtain after drying with hole configurations and
The SiO/ with carbon coating layer of nitridation lack layer graphite/artificial graphite anode's composite material or nitridation with hole configurations and tool
There is SiO/ graphene/artificial graphite anode's composite material of carbon coating layer.
2. the method for template preparation anode of lithium ion battery composite material according to claim 1, which is characterized in that institute
Stating carbon source is at least one of sucrose, glucose, fructose, powder-beta-dextrin, lactose, citric acid and starch.
3. the method for template preparation anode of lithium ion battery composite material according to claim 1, which is characterized in that institute
Broken mixed method is stated as grinding, mechanical fusion or spray drying.
4. the method for template preparation anode of lithium ion battery composite material according to claim 1, which is characterized in that institute
The partial size for stating SiO particle is 0.1 μm -50 μm, and the partial size of the artificial graphite is 0.1 μm -15 μm.
5. the method for template preparation anode of lithium ion battery composite material according to claim 1, which is characterized in that institute
Stating inert gas is nitrogen, argon gas or helium.
6. the method for template preparation anode of lithium ion battery composite material according to claim 1, which is characterized in that institute
Stating nitrogenous compound is at least one in urea, melamine, polypyrrole, polyaniline, N-Methyl pyrrolidone and azo dyes
Kind.
7. the method for template preparation anode of lithium ion battery composite material according to claim 1, which is characterized in that carbon
Changing the mode that processed material is mixed with nitrogenous compound is to adsorb in aqueous solution, i.e., nitrogenous compound is dissolved in the water, is contained
Then carbonization treatment object is added in the aqueous solution of the nitrogenous compound and carries out adsorption by the aqueous solution of nitrogen compound, absorption
It takes out the carbonization treatment object after completing and the carbonization treatment object is dried.
8. the method for template preparation anode of lithium ion battery composite material according to claim 7, which is characterized in that contain
In the aqueous solution of nitrogen compound, the concentration of nitrogenous compound is 0.05mol/L-1mol/L；Ultrasonic wave is applied in adsorption process
Disturbance or stirring, drying temperature are 40 DEG C -100 DEG C, and dry duration is 30min-5h, and the time of adsorption took is
1min-3h。
9. the method for template preparation anode of lithium ion battery composite material according to claim 1, which is characterized in that carbon
Changing the mode that processed material is mixed with nitrogenous compound is that carbonization treatment object and nitrogenous compound powder is mutual in a manner of solid
Mixing.
10. the method for template preparation anode of lithium ion battery composite material according to claim 9, which is characterized in that
The method of solid mixing is grinding or stirs that the mass ratio of carbonization treatment object and nitrogenous compound powder is (3-30): 1.
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| KR20140114189A (en) * | 2013-03-18 | 2014-09-26 | 국립대학법인 울산과학기술대학교 산학협력단 | Manufacturing method of Si-SiOx Core-Shell Nanowire and Lithium Ion Battery using the Nanowire |
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| KR20140114189A (en) * | 2013-03-18 | 2014-09-26 | 국립대학법인 울산과학기술대학교 산학협력단 | Manufacturing method of Si-SiOx Core-Shell Nanowire and Lithium Ion Battery using the Nanowire |
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