CN109904433A - Large capacity fast charging and discharging graphene lithium ion battery and its synthesis technology - Google Patents
Large capacity fast charging and discharging graphene lithium ion battery and its synthesis technology Download PDFInfo
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- CN109904433A CN109904433A CN201910203586.4A CN201910203586A CN109904433A CN 109904433 A CN109904433 A CN 109904433A CN 201910203586 A CN201910203586 A CN 201910203586A CN 109904433 A CN109904433 A CN 109904433A
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Abstract
The present invention relates to a kind of large capacity fast charging and discharging graphene lithium ion battery and its synthesis technology, comprising the following steps: prepares graphene coated hard carbon/tin microballoon composite material, prepares negative electrode slurry, preparation negative electrode tab, assembling lithium ion battery.The present invention is using luffa as load, it will be in the luffa gap after the insertion activation of tin source presoma, using Spray calcination, make the luffa carbonization of activation at the hard carbon sphere of tin supported, in spray process, graphene in gas is wrapped in air on hard carbon sphere, form graphene coated hard carbon/tin microballoon composite material, tin is in the gap of hard carbon, hard carbon provides expansion space for tin, the cladding of graphene, enhance its electric conductivity, and tin is wrapped in hard carbon, tin is prevented to be desorbed, form closely connection, to improve the capacity of lithium ion battery, enhance high rate performance and cyclical stability, keep the inactivation of active material.
Description
Technical field
The present invention relates to lithium ion battery preparation fields, and in particular to a kind of large capacity fast charging and discharging graphene lithium ion
Battery and its synthesis technology.
Background technique
Compared to secondary cells such as ni-Cd, ni-mh, plumbic acids, lithium ion battery has unique advantage, first lithium-ion electric
The open-circuit voltage in pond is up to 3.6V, much higher than ni-mh, the 1.2V of ni-Cd, can effectively reduce battery in battery pack quantity, be conducive to
Battery lightweight and miniaturization, lithium ion battery are positive lithium ion battery in the case where depth is discharged completely with cobalt acid lithium, are used
Service life up to 1000 times, in circulation, does not generate memory effect, can charge in the case where not fully discharged without influencing its appearance
Amount, self-discharge rate is low, and first charge-discharge rear electrode material surface can form dielectric film, prevents electronics from passing through, prevents from leaking electricity, nothing
The poisonous and harmful substances such as lead, cadmium, mercury, it is environmental-friendly.
But there is also some problems for lithium ion battery, if battery internal resistance is higher, voltage change is larger when work, electricity
The problems such as pole material cost is high.Lithium ion battery carbon cathode active material generally has Carbon anode, non-Carbon anode, and Carbon anode includes stone
Ink, amorphous carbon are not able to satisfy people gradually for high-energy density since carbon material is limited by its lower theoretical capacity
The demand of lithium ion battery, therefore turned to non-Carbon anode, including lithium titanate, silicon-based anode, tin base cathode, due to metal and its
Alloying reaction, therefore theoretical capacity with higher, such as the tin of 1mol can occur with lithium for oxide, such as tin, germanium, lead, iron
It can at most react with the lithium of 4.4mol, be 993mAh g-1 according to the Theoretical Mass specific capacity that this formula can be calculated tin,
Theoretical volumetric capacity is 7262mAh cm-3, is equivalent to three times of carbon material theoretical capacity, therefore negative as lithium ion battery
Pole material has wide Research Prospects.
However, still thering are some problems demands to solve as lithium ion battery negative material due to the characteristic of simple substance tin.Tin
During carrying out alloying reaction with lithium ion, it is swollen that the insertion and abjection of lithium ion will lead to the serious volume of simple substance tin generation
Swollen, expansion rate is up to 300%, causes electrode material pulverization itself, and disengage with collector, can not be formed and closely be connected
It connects, to reduce the capacity of lithium ion battery, influences its high rate performance and cyclical stability, be finally likely to result in active material
Inactivation.Meanwhile tin and electric conductivity after lithium formation alloy phase are poor, internal resistance increases, and hinders the complete progress of de- lithium, generation can not
Inverse capacity.In addition, battery for the first time in discharge process, will form one layer of SEI film on the tin material surface with electrolyte contacts, influence
The movement of lithium ion causes electrode material to discharge for the first time the appearance of irreversible capacity.
Summary of the invention
In order to solve the deficiencies in the prior art, the present invention provides a kind of large capacity fast charging and discharging graphene lithium ion battery
And its synthesis technology.
The technical solution adopted by the present invention to solve the technical problems is: a kind of large capacity fast charging and discharging graphene lithium from
Sub- battery, including battery dorsal shield, spring, gasket, positive plate, diaphragm paper, battery case, negative electrode tab, the negative electrode tab use graphite
Alkene cladding hard carbon/tin microballoon composite material preparation negative electrode slurry is made.
A kind of its synthesis technology of large capacity fast charging and discharging graphene lithium ion battery, comprising the following steps:
Step 1: preparing graphene coated hard carbon/tin microballoon composite material
Take 10g tin source presoma, 2-3g activation luffa particle carry out ground and mixed, be subsequently dispersed 300ml go from
In sub- water, and surfactant is added, keeps its fully dispersed with the method for ultrasonic disperse, then using graphene as carbon source, benefit
It is sprayed with spray dryer, at 200 DEG C of inlet temperature, outlet temperature is presoma to be formed by spraying, in argon gas at 110 DEG C
700-1000 DEG C of sintering, cooled to room temperature are sufficiently washed with deionized water under atmosphere, the dry 20- in vacuum drying oven
For 24 hours, graphene coated hard carbon/tin microballoon composite material is obtained；
Step 2: preparing negative electrode slurry
8g graphene coated hard carbon/tin microballoon composite material, 1-1.2g binder, 1-1.2g conductive black are weighed, is put
Enter in beaker, on magnetic stirring apparatus, deionized water is added dropwise while stirring, until material is uniformly mixed into black paste slurry, after
Continuous stirring 4h, obtains negative electrode slurry；
Step 3: preparation negative electrode tab
Negative electrode slurry is applied on clean negative pole currect collecting plate, is placed in drying box, at 80-100 DEG C, dries 12h,
Dried negative electrode tab is placed in a mold, 3min is pressed under 8Mpa pressure, obtains negative electrode tab；
Step 4: assembling lithium ion battery
Battery dorsal shield in the prior art, spring, gasket, positive plate, diaphragm paper, battery case are selected, is prepared in the application
Negative electrode tab, assembled according to installation method in the prior art, be filled with electrolyte, assembled battery is sealed with sealing machine
Mouthful, it stands more than for 24 hours, comes into full contact with electrolyte with electrode material, graphene lithium ion battery is made.
Specifically, the tin source presoma the preparation method comprises the following steps: weighing the citric acid of certain mass, stannous chloride and chlorination
Sodium powder end is placed in a beaker, and suitable deionized water is added, is completely dissolved with magnetic stirrer to powder, obtains colourless
Colourless transparent liquid is transferred in culture dish by the transparent body, is freezed 12h, is transferred in freeze dryer after freezing completely, in -50 DEG C
In be freeze-dried, obtain white powder, it is polished to obtain white tin source presoma.
Specifically, it is described activation luffa the preparation method comprises the following steps: being cut into multiple diameter 2.5cm, the circle of thickness 2-5mm is thin
Then piece is placed into boiling in boiling water and takes out after boiling 30min, sufficiently rinsed well with distilled water, be put into mass fraction 30%
It is activated in NaOH solution, a certain amount of ethyl alcohol or propyl alcohol is added, made the quality 20% of ethyl alcohol or propyl alcohol, alkalize under room temperature
It 48-72 hours, is then placed in the microwave of 700W after intermittent radiation 10min, flows back 3 hours, spend in 80 DEG C of waters bath with thermostatic control
Ionized water washed product several times, until washing is in neutrality, is filtered by vacuum, and obtains activation luffa, the luffa of activation is cut
It is broken, be ground into activation luffa particle.
Specifically, the binder uses sodium carboxymethylcellulose (CMC) or polytetrafluoroethylene (PTFE) (PTFE).
Specifically, the negative pole currect collecting plate uses copper foil or nickel foil.
Specifically, the spray drying, equipment setting parameter are that fltting speed is set as 0.5ml/h, spray head to receiver
Distance is 10cm, and electrostatic spray is carried out under the high voltage electric field of 25kV.
The invention has the following advantages: the main component of luffa is using luffa as load in this law
Cellulose, hemicellulose and lignin, light and gap structure is flourishing, is in natural porous composite construction, in ground and mixed process
In, by the luffa gap after the insertion activation of tin source presoma, using Spray calcination, make the luffa carbonization of activation at negative
The hard carbon sphere for carrying tin, in spray process, the graphene in gas is wrapped in air on hard carbon sphere, forms graphene packet
Covering hard carbon/tin microballoon composite material, tin is in the gap of hard carbon, and hard carbon provides expansion space for tin, the cladding of graphene,
Its electric conductivity is enhanced, and tin is wrapped in hard carbon, tin is prevented to be desorbed, closely connection is formed, to improve lithium ion
The capacity of battery enhances high rate performance and cyclical stability, keeps the inactivation of active material.
Specific embodiment
It is described in detail to various aspects of the present invention below, unless specific instructions, various raw materials of the invention can pass through
It is prepared or is commercially available according to the conventional method of this field.
Embodiment 1
A kind of large capacity fast charging and discharging graphene lithium ion battery, including battery dorsal shield, spring, gasket, positive plate, every
Film paper, battery case, negative electrode tab, the negative electrode tab is using graphene coated hard carbon/tin microballoon composite material preparation negative electrode slurry
It is made.
A kind of its synthesis technology of large capacity fast charging and discharging graphene lithium ion battery, comprising the following steps:
Step 1: preparing graphene coated hard carbon/tin microballoon composite material
It takes 10g tin source presoma, 2g activation luffa particle to carry out ground and mixed, is subsequently dispersed the deionization of 300ml
In water, and surfactant is added, keeps its fully dispersed with the method for ultrasonic disperse, then using graphene as carbon source, utilizes
Spray dryer is sprayed, and at 200 DEG C of inlet temperature, outlet temperature is presoma to be formed by spraying, in argon atmospher at 110 DEG C
Lower 700 DEG C of sintering are enclosed, cooled to room temperature is sufficiently washed with deionized water, and dry 20h, obtains graphite in vacuum drying oven
Alkene coats hard carbon/tin microballoon composite material；
Step 2: preparing negative electrode slurry
8g graphene coated hard carbon/tin microballoon composite material, 1g binder, 1g conductive black are weighed, is put into beaker,
On magnetic stirring apparatus, deionized water is added dropwise while stirring, until material is uniformly mixed into black paste slurry, continues to stir 4h,
Obtain negative electrode slurry；
Step 3: preparation negative electrode tab
Negative electrode slurry is applied on clean negative pole currect collecting plate, is placed in drying box, at 80 DEG C, 12h is dried, will do
Dry good negative electrode tab is placed in a mold, is pressed 3min under 8Mpa pressure, is obtained negative electrode tab；
Step 4: assembling lithium ion battery
Battery dorsal shield in the prior art, spring, gasket, positive plate, diaphragm paper, battery case are selected, is prepared in the application
Negative electrode tab, assembled according to installation method in the prior art, assembled battery sealed with sealing machine, stand for 24 hours
More than, it comes into full contact with electrolyte with electrode material, graphene lithium ion battery is made.
Specifically, the tin source presoma the preparation method comprises the following steps: weighing the citric acid of certain mass, stannous chloride and chlorination
Sodium powder end is placed in a beaker, and suitable deionized water is added, is completely dissolved with magnetic stirrer to powder, obtains colourless
Colourless transparent liquid is transferred in culture dish by the transparent body, is freezed 12h, is transferred in freeze dryer after freezing completely, in -50 DEG C
In be freeze-dried, obtain white powder, it is polished to obtain white tin source presoma.
Specifically, it is described activation luffa the preparation method comprises the following steps: being cut into multiple diameter 2.5cm, the circle of thickness 2-5mm is thin
Then piece is placed into boiling in boiling water and takes out after boiling 30min, sufficiently rinsed well with distilled water, be put into mass fraction 30%
It is activated in NaOH solution, a certain amount of ethyl alcohol or propyl alcohol is added, made the quality 20% of ethyl alcohol or propyl alcohol, alkalize under room temperature
48h is then placed in the microwave of 700W after intermittent radiation 10min, is flowed back 3 hours in 80 DEG C of waters bath with thermostatic control, is used deionized water
Washed product several times, until washing is in neutrality, is filtered by vacuum, and obtains activation luffa, the luffa of activation is shredded, is ground
At activation luffa particle.
Specifically, the binder uses sodium carboxymethylcellulose (CMC) or polytetrafluoroethylene (PTFE) (PTFE).
Specifically, the negative pole currect collecting plate uses copper foil or nickel foil.
Specifically, the spray drying, equipment setting parameter are that fltting speed is set as 0.5ml/h, spray head to receiver
Distance is 10cm, and electrostatic spray is carried out under the high voltage electric field of 25kV.
Embodiment 2
A kind of large capacity fast charging and discharging graphene lithium ion battery, including battery dorsal shield, spring, gasket, positive plate, every
Film paper, battery case, negative electrode tab, the negative electrode tab is using graphene coated hard carbon/tin microballoon composite material preparation negative electrode slurry
It is made.
A kind of its synthesis technology of large capacity fast charging and discharging graphene lithium ion battery, comprising the following steps:
Step 1: preparing graphene coated hard carbon/tin microballoon composite material
Take 10g tin source presoma, 2.5g activation luffa particle carry out ground and mixed, be subsequently dispersed 300ml go from
In sub- water, and surfactant is added, keeps its fully dispersed with the method for ultrasonic disperse, then using graphene as carbon source, benefit
It is sprayed with spray dryer, at 200 DEG C of inlet temperature, outlet temperature is presoma to be formed by spraying, in argon gas at 110 DEG C
The lower 800 DEG C of sintering of atmosphere, cooled to room temperature are sufficiently washed with deionized water, and dry 22h, obtains stone in vacuum drying oven
Black alkene coats hard carbon/tin microballoon composite material；
Step 2: preparing negative electrode slurry
8g graphene coated hard carbon/tin microballoon composite material, 1.1g binder, 1.2g conductive black are weighed, burning is put into
In cup, on magnetic stirring apparatus, deionized water is added dropwise while stirring, until material is uniformly mixed into black paste slurry, continues to stir
4h is mixed, negative electrode slurry is obtained；
Step 3: preparation negative electrode tab
Negative electrode slurry is applied on clean negative pole currect collecting plate, is placed in drying box, at 90 DEG C, 12h is dried, will do
Dry good negative electrode tab is placed in a mold, is pressed 3min under 8Mpa pressure, is obtained negative electrode tab；
Step 4: assembling lithium ion battery
Battery dorsal shield in the prior art, spring, gasket, positive plate, diaphragm paper, battery case are selected, is prepared in the application
Negative electrode tab, assembled according to installation method in the prior art, assembled battery sealed with sealing machine, stand for 24 hours
More than, it comes into full contact with electrolyte with electrode material, graphene lithium ion battery is made.
Specifically, the tin source presoma the preparation method comprises the following steps: weighing the citric acid of certain mass, stannous chloride and chlorination
Sodium powder end is placed in a beaker, and suitable deionized water is added, is completely dissolved with magnetic stirrer to powder, obtains colourless
Colourless transparent liquid is transferred in culture dish by the transparent body, is freezed 12h, is transferred in freeze dryer after freezing completely, in -50 DEG C
In be freeze-dried, obtain white powder, it is polished to obtain white tin source presoma.
Specifically, it is described activation luffa the preparation method comprises the following steps: being cut into multiple diameter 2.5cm, the circle of thickness 2-5mm is thin
Then piece is placed into boiling in boiling water and takes out after boiling 30min, sufficiently rinsed well with distilled water, be put into mass fraction 30%
It is activated in NaOH solution, a certain amount of ethyl alcohol or propyl alcohol is added, make the quality 20% of ethyl alcohol or propyl alcohol, alkalize 62 under room temperature
Hour, it is then placed in the microwave of 700W after intermittent radiation 10min, flows back 3 hours in 80 DEG C of waters bath with thermostatic control, use deionized water
Washed product several times, until washing is in neutrality, is filtered by vacuum, and obtains activation luffa, the luffa of activation is shredded, is ground
At activation luffa particle.
Specifically, the binder uses sodium carboxymethylcellulose (CMC) or polytetrafluoroethylene (PTFE) (PTFE).
Specifically, the negative pole currect collecting plate uses copper foil or nickel foil.
Specifically, the spray drying, equipment setting parameter are that fltting speed is set as 0.5ml/h, spray head to receiver
Distance is 10cm, and electrostatic spray is carried out under the high voltage electric field of 25kV.
Embodiment 3
A kind of large capacity fast charging and discharging graphene lithium ion battery, including battery dorsal shield, spring, gasket, positive plate, every
Film paper, battery case, negative electrode tab, the negative electrode tab is using graphene coated hard carbon/tin microballoon composite material preparation negative electrode slurry
It is made.
A kind of its synthesis technology of large capacity fast charging and discharging graphene lithium ion battery, comprising the following steps:
Step 1: preparing graphene coated hard carbon/tin microballoon composite material
It takes 10g tin source presoma, 3g activation luffa particle to carry out ground and mixed, is subsequently dispersed the deionization of 300ml
In water, and surfactant is added, keeps its fully dispersed with the method for ultrasonic disperse, then using graphene as carbon source, utilizes
Spray dryer is sprayed, and at 200 DEG C of inlet temperature, outlet temperature is presoma to be formed by spraying, in argon atmospher at 110 DEG C
Lower 1000 DEG C of sintering are enclosed, cooled to room temperature is sufficiently washed with deionized water, and drying for 24 hours, obtains graphite in vacuum drying oven
Alkene coats hard carbon/tin microballoon composite material；
Step 2: preparing negative electrode slurry
8g graphene coated hard carbon/tin microballoon composite material, 1.2g binder, 1.1g conductive black are weighed, burning is put into
In cup, on magnetic stirring apparatus, deionized water is added dropwise while stirring, until material is uniformly mixed into black paste slurry, continues to stir
4h is mixed, negative electrode slurry is obtained；
Step 3: preparation negative electrode tab
Negative electrode slurry is applied on clean negative pole currect collecting plate, is placed in drying box, at 100 DEG C, dries 12h, it will
Dried negative electrode tab is placed in a mold, is pressed 3min under 8Mpa pressure, is obtained negative electrode tab；
Step 4: assembling lithium ion battery
Battery dorsal shield in the prior art, spring, gasket, positive plate, diaphragm paper, battery case are selected, is prepared in the application
Negative electrode tab, assembled according to installation method in the prior art, assembled battery sealed with sealing machine, stand for 24 hours
More than, it comes into full contact with electrolyte with electrode material, graphene lithium ion battery is made.
Specifically, the tin source presoma the preparation method comprises the following steps: weighing the citric acid of certain mass, stannous chloride and chlorination
Sodium powder end is placed in a beaker, and suitable deionized water is added, is completely dissolved with magnetic stirrer to powder, obtains colourless
Colourless transparent liquid is transferred in culture dish by the transparent body, is freezed 12h, is transferred in freeze dryer after freezing completely, in -50 DEG C
In be freeze-dried, obtain white powder, it is polished to obtain white tin source presoma.
Specifically, it is described activation luffa the preparation method comprises the following steps: being cut into multiple diameter 2.5cm, the circle of thickness 2-5mm is thin
Then piece is placed into boiling in boiling water and takes out after boiling 30min, sufficiently rinsed well with distilled water, be put into mass fraction 30%
It is activated in NaOH solution, a certain amount of ethyl alcohol or propyl alcohol is added, make the quality 20% of ethyl alcohol or propyl alcohol, alkalize 72 under room temperature
Hour, it is then placed in the microwave of 700W after intermittent radiation 10min, flows back 3 hours in 80 DEG C of waters bath with thermostatic control, use deionized water
Washed product several times, until washing is in neutrality, is filtered by vacuum, and obtains activation luffa, the luffa of activation is shredded, is ground
At activation luffa particle.
Specifically, the binder uses sodium carboxymethylcellulose (CMC) or polytetrafluoroethylene (PTFE) (PTFE).
Specifically, the negative pole currect collecting plate uses copper foil or nickel foil.
Specifically, the spray drying, equipment setting parameter are that fltting speed is set as 0.5ml/h, spray head to receiver
Distance is 10cm, and electrostatic spray is carried out under the high voltage electric field of 25kV.
The present invention is not limited to the embodiment, anyone should learn that the structure made under the inspiration of the present invention becomes
Change, the technical schemes that are same or similar to the present invention are fallen within the scope of protection of the present invention.
Technology not described in detail in the present invention, shape, construction portion are well-known technique.
Claims (7)
1. a kind of large capacity fast charging and discharging graphene lithium ion battery, including battery dorsal shield, spring, gasket, positive plate, diaphragm
Paper, battery case, negative electrode tab, it is characterised in that: the negative electrode tab is using graphene coated hard carbon/tin microballoon composite material preparation
Negative electrode slurry is made.
2. a kind of its synthesis technology of large capacity fast charging and discharging graphene lithium ion battery, it is characterised in that: including following step
It is rapid:
Step 1: preparing graphene coated hard carbon/tin microballoon composite material
It takes 10g tin source presoma, 2-3g activation luffa particle to carry out ground and mixed, is subsequently dispersed the deionized water of 300ml
In, and surfactant is added, keep its fully dispersed with the method for ultrasonic disperse, then using graphene as carbon source, utilizes spray
Mist drying machine is sprayed, and at 200 DEG C of inlet temperature, outlet temperature is presoma to be formed by spraying, in argon atmosphere at 110 DEG C
Lower 700-1000 DEG C of sintering, cooled to room temperature are sufficiently washed with deionized water, and dry 20-24h, obtains in vacuum drying oven
To graphene coated hard carbon/tin microballoon composite material；
Step 2: preparing negative electrode slurry
8g graphene coated hard carbon/tin microballoon composite material, 1-1.2g binder, 1-1.2g conductive black are weighed, burning is put into
In cup, on magnetic stirring apparatus, deionized water is added dropwise while stirring, until material is uniformly mixed into black paste slurry, continues to stir
4h is mixed, negative electrode slurry is obtained；
Step 3: preparation negative electrode tab
Negative electrode slurry is applied on clean negative pole currect collecting plate, is placed in drying box, at 80-100 DEG C, 12h is dried, will do
Dry good negative electrode tab is placed in a mold, is pressed 3min under 8Mpa pressure, is obtained negative electrode tab；
Step 4: assembling lithium ion battery
It by battery dorsal shield, spring, gasket, positive plate, diaphragm paper, battery case, negative electrode tab, is assembled, is filled with electrolyte, by group
The battery installed is sealed with sealing machine, is stood more than for 24 hours, is come into full contact with electrolyte with electrode material, obtained graphene lithium from
Sub- battery.
3. a kind of its synthesis technology of large capacity fast charging and discharging graphene lithium ion battery according to claim 2,
Be characterized in that: the tin source presoma the preparation method comprises the following steps: weighing the citric acid of certain mass, stannous chloride and sodium chloride powder
End is placed in a beaker, and suitable deionized water is added, is completely dissolved with magnetic stirrer to powder, obtains colorless and transparent
Colourless transparent liquid is transferred in culture dish by body, freeze 12h, be transferred in freeze dryer after freezing completely, in -50 DEG C into
Row freeze-drying, obtains white powder, polished to obtain white tin source presoma.
4. a kind of its synthesis technology of large capacity fast charging and discharging graphene lithium ion battery according to claim 2,
Be characterized in that: the activation luffa the preparation method comprises the following steps: be cut into multiple diameter 2.5cm, the circle sheet of thickness 2-5mm, then
It is placed into boiling in boiling water to take out after boiling 30min, is sufficiently rinsed well with distilled water, be put into the NaOH solution of mass fraction 30%
A certain amount of ethyl alcohol or propyl alcohol is added in middle activation, makes the quality 20% of ethyl alcohol or propyl alcohol, alkalizes 48-72 hours under room temperature,
It is then placed in the microwave of 700W after intermittent radiation 10min, flows back 3 hours, be washed with deionized in 80 DEG C of waters bath with thermostatic control
Product several times, until washing is in neutrality, is filtered by vacuum, and obtains activation luffa, the luffa of activation is shredded, grinds and survives
Change luffa particle.
5. a kind of its synthesis technology of large capacity fast charging and discharging graphene lithium ion battery according to claim 2,
Be characterized in that: the binder uses sodium carboxymethylcellulose (CMC) or polytetrafluoroethylene (PTFE) (PTFE).
6. a kind of its synthesis technology of large capacity fast charging and discharging graphene lithium ion battery according to claim 2,
Be characterized in that: the negative pole currect collecting plate uses copper foil or nickel foil.
7. a kind of its synthesis technology of large capacity fast charging and discharging graphene lithium ion battery according to claim 2,
Be characterized in that: the spray drying, equipment setting parameter are that fltting speed is set as 0.5ml/h, and the distance of spray head to receiver is
10cm carries out electrostatic spray under the high voltage electric field of 25kV.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114156456A (en) * | 2021-12-08 | 2022-03-08 | 西北工业大学 | High-capacity rapid charge-discharge graphene @ hard carbon composite material, preparation method thereof and application of composite material in sodium ion battery |
| CN114497500A (en) * | 2022-01-26 | 2022-05-13 | 南京林业大学 | Nano tin/hard carbon composite electrode material for sodium ion battery and preparation method thereof |
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