CN109742450A - A kind of lithium sulfide-tin full battery and the preparation method and application thereof - Google Patents
A kind of lithium sulfide-tin full battery and the preparation method and application thereof Download PDFInfo
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- CN109742450A CN109742450A CN201811617981.9A CN201811617981A CN109742450A CN 109742450 A CN109742450 A CN 109742450A CN 201811617981 A CN201811617981 A CN 201811617981A CN 109742450 A CN109742450 A CN 109742450A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The present invention relates to energy storage fields, and in particular to a kind of lithium sulfide-tin full battery and the preparation method and application thereof.The preparation method of the full battery, comprising the following steps: the preparation of lithium sulfide anode electrode, the preparation of nanometer tin material negative electrode and the assembling of lithium sulfide-tin full battery.Sulphur lithium battery of the invention breaks the conventional sulphur that do not use as anode, also avoid lithium metal as cathode simultaneously, but the lithium sulfide that lithiumation sulphur obtains in advance is as anode electrode, it is negative pole using nanometer tin material, it is assembled into lithium sulfide-tin full battery, the security performance for increasing battery devises the lithium ion full battery with more preferable specific energy density；Proportion when sizing mixing present invention optimizes positive and negative anodes provides technique for preparation high dispersive and highly viscous positive and negative anodes coating slurry.
Description
Technical field
The present invention relates to energy storage fields, and in particular to a kind of lithium sulfide-tin full battery and the preparation method and application thereof.
Background technique
Such as with portable electronic device: smart phone, computer, unmanned plane, digital camera, medical instrument, music
The extensive use of device, the electron stored energy equipment for needing higher energy density safer provide electric energy for it；Another aspect country
New-energy automobile strategy also needs the energy storage device of a large amount of safety, higher energy density.Lithium-sulfur cell possesses 2600kw/kg's
Theoretical Mass specific energy density, this is 5 times or more of traditional ternary material lithium battery.It can be portable under unit mass
Electronic product provides bigger electric energy, automobile is allowed to have bigger cruising ability, first device especially very sensitive to energy density
Part, such as: unmanned plane, wireless headset, the high-energy density advantage of lithium-sulfur cell is clearly.Moreover, as the main of anode
Material simple substance sulfur feedstock is abundant, cheap.These advantages more outstanding, which make lithium-sulfur cell probably, becomes next-generation
The main product of portable electronic product supply power supply.
But lithium-sulfur cell also has the shortcomings that challenge to influence its commercially use process because of many, wherein high chemistry is living
The use of property lithium anode increases the potential security risk of battery；The active sulfur of lower quality content also weakens in the electrodes
The performance of its high-energy density advantage.
Summary of the invention
It is an object of the invention to provide a kind of preparation of lithium sulfide-tin full battery in place of overcome the deficiencies in the prior art
Method.
An object of the present invention is achieved through the following technical solutions:
A kind of lithium sulfide-tin (Li2S-Sn) full battery preparation method, step of preparation process are as follows:
(1) according to sulphur powder: conductive agent: binder mass ratio is (5-7): (2-4): the ratio of (0.5-1.5) is by sulphur
Then slurry is coated on metal aluminum foil by powder, conductive agent and binder making at slurry, dry later, tabletting is simultaneously assembled into
Battery discharge, acquisition-lithium sulfide anode electrode；
(2) according to nanometer tin material: conductive carbon: binder mass ratio is (3-6): (4-7): the ratio of (1-3) will be received
Then slurry is coated on copper foil by rice tin material, conductive carbon and binder making at slurry, tabletting after drying obtains cathode
Pole piece；
(3) lithium sulfide anode electrode and cathode pole piece are assembled into lithium sulfide-tin (Li2S-Sn) full battery.
Further, in the step (1) positive coating slurry specific preparation method: the weighed binder is divided
It is dissolved in N-Methyl pyrrolidone, and is stirred under different mixing speeds twice twice, second of mixing speed is lower than first
Secondary mixing speed, until binder is completely dissolved；The conductive agent is poured into above-mentioned mixed solution, uniform stirring 2-5 hours
Afterwards, it is added and weighs sulphur powder that is good and being fully ground, at the uniform velocity stirred under certain speed of agitator 2-10 hours, obtain obtaining nothing
Granular sensation slurry is spare.
Further, the specific preparation method of the anode pole piece: coating slurry positive in step (1) is coated uniformly on
On metal aluminum foil, coating thickness is 150-250 microns, then dry under 50 degrees Celsius to 80 degrees Celsius, and drying time is 2 small
When by 10 hours, after obtaining dry cathode pole piece, then pole piece rolled into the pole piece for 120-230 microns, is then with lithium metal
Cathode is assembled into 2032 batteries, discharge into open-circuit voltage be 1.45V, take out discharged after anode pole piece be lithium sulfide just
Pole electrode.
Further, in the step (2) cathode coating slurry specific preparation method: by the weighed binder point
It is dissolved in N-Methyl pyrrolidone, and is stirred under different mixing speeds twice twice, second of mixing speed is lower than first
Secondary mixing speed, until binder is completely dissolved；The conductive carbon is poured into above-mentioned mixed solution, uniform stirring 2-5 hours
Afterwards, it is added and weighs nanometer tin material that is good and being fully ground, at the uniform velocity stir 2-10 hours, obtained under certain speed of agitator
It obtains spare without granular sensation slurry.
Further, the specific preparation method of the cathode pole piece: cathode coating slurry in step (2) is coated uniformly on
On metal copper foil, coating thickness is 120-200 microns, then dry under 60 degrees Celsius to 100 degrees Celsius, drying time 2
Hour obtained after drying cathode pole piece by 10 hours, then pole piece is rolled the cathode pole piece for 80-160 microns.
Further, the conductive agent is at least one of Super P and acetylene black.
Further, the binder is to gather inclined fluorine difluoroethylene (PVDF).
Further, binder interval time is added when dissolving twice in the step (2) no more than 2 hours, for the first time
Mixing speed is 400-1000 revs/min, and second of mixing speed is 100-500 revs/min.
Further, assembly positive and negative anodes thickness of electrode difference described in the step (3) is 10-30 microns to assemble vulcanization
Lithium-tin full battery.
It is a further object of the present invention to provide a kind of lithium sulfide-tin (Li of above method preparation2S-Sn) full battery.
Another object of the present invention is to provide a kind of lithium sulfide-tin (Li of above method equipment2S-Sn) full battery is being stored up
The application in energy field.
In the present invention, the lithium sulfide obtained using the elemental sulfur of lithiumation porous carbon load high mass content is as positive material
Material, nanometer tin are prepared for lithium sulfide positive electrode-tin negative electrode full battery as negative electrode material.And to the material knot of the battery
Structure and the full battery button cell of assembling are characterized and have been tested.The experimental results showed that the full battery of preparation has good electricity
Chemical stability.Basin area load capacity is up to 3.25mg/cm in anode before prelithiation2, the use of sulfur electrode is anode, gold
Category lithium piece is cathode, is pre-assembled to lithium-sulfur cell and carries out prelithiation acquisition lithium sulfide anode electrode.Tin cathode uses nanometer tin
Material and conductive carbon material with mix, the face load capacity of active tin is 3.25mg/cm in grade piece2.The button cell being assembled into
Specific capacity relative to positive grade piece is 730mAh/g, and the theoretical energy density relative to positive/negative plate of calculating is 657Wh/
kg.After being assembled into full battery, recycled 100 times under the multiplying power electric current of 0.05C (electric current corresponding to 0.3mA), capacity is from most
First 3.14mAh drops to 2.05mAh, and corresponding to capacity retention ratio is 65%.
Compared with prior art, the present invention has the advantage that
(1) first charge-discharge capacity has 3.14mAh after the full battery of the invention is assembled into 2032 type button cells, relatively
In positive and negative anodes electrode slice energy density be 657Wh/kg, much higher than traditional lithium ion battery.
(2) lithium-sulfur cell of the invention break it is conventional without using sulphur as anode, while also avoiding lithium metal as cathode,
But the lithium sulfide that lithiumation sulphur obtains in advance is as anode electrode.It is negative pole using nanometer tin material, is assembled into full battery, increased
The security performance of battery, devises the lithium ion full battery with more preferable specific energy density.
(3) the invention avoids use the lithium metal greatly to improve the Special safety of battery as cathode in lithium-sulfur cell
Property.
(4) proportion when sizing mixing present invention optimizes positive and negative anodes, for preparation high dispersive and highly viscous positive and negative anodes coating materials
Material provides technique.
(5) material of the present invention dissolves the technique of binder twice, improves the uniformity of cell size.
(6) present invention is cathode using tin-based material, designs the lithium ion full battery of more preferable cyclical stability.
Detailed description of the invention
Fig. 1 is the pattern test of 1 positive electrode active materials of embodiment in Flied emission scanning electron microscope diagram.
Fig. 2 is the Li of example 1 group dress2S-Sn full battery charging and discharging curve figure, a is the 1st cycle charge discharge of battery in figure
Electric curve graph, b is the 250th cycle charge-discharge curve graph of battery in figure, and c is the 500th cycle charge-discharge curve of battery in figure
Scheme, d is the 750th cycle charge-discharge curve graph of battery in figure, and e is the 1000th cycle charge-discharge curve graph of battery in figure.
Fig. 3 is the Li that embodiment 2 assembles2S-Sn full battery cycle characteristics curve graph.
Fig. 4 is the Li that embodiment 2 assembles2S-Sn full battery Cyclic voltamogram curve graph.
Fig. 5 is the Li that embodiment 2 assembles2S-Sn full battery AC impedance curve graph.
Fig. 6 is prelithiation anode electrode piece relative to positive grade piece rate charge-discharge curve graph.
Fig. 7 is prelithiation anode electrode piece relative to positive grade piece 0.2C cyclic curve figure.
Fig. 8 is prelithiation anode electrode piece relative to positive grade piece curve of double curvature figure.
Fig. 9 is 2032 type Li of assembling2S-Sn full battery cycle characteristics curve graph.
Specific embodiment
Further to illustrate technological means and its effect adopted by the present invention, below in conjunction with preferred implementation of the invention
Example to further illustrate the technical scheme of the present invention, but the present invention is not limited in scope of embodiments.
Embodiment 1:
A kind of lithium sulfide-tin full battery and preparation method thereof, specifically includes the following steps:
(1) it is fully ground the industrial sulphur powder that purity is 95.5% or more and crosses after 300 meshes that weigh 0.5 gram spare, then claim
0.05 gram of binder Kynoar (PVDF) is taken to be dissolved in 3 milliliters of N-Methyl pyrrolidone (NMP) solvents, and in stirring speed
Under the revolving speed that degree is 600 revs/min after magnetic agitation 1 minute, 0.05 gram of binder Kynoar (PVDF) is added；To poly-
After vinylidene (PVDF) dissolution substantially, turning down mixing speed is 200 revs/min, after persistently stirring 1 hour, is added 0.4 gram
Super P conductive agent is added 0.5 gram of spare sulphur powder of above-mentioned weighing after continuing stirring 3 hours, obtains just after being stirred for 3 hours
Pole coating slurry.
(2) positive coating slurry is coated uniformly on the dull surface of aluminium foil with preparing device with 200 microns of coating thickness,
It then will be dry 8 hours in the electrode coated drying box for being placed in 60 degrees Celsius, after electrode is thoroughly dried, using roller press by grade
The sequin that piece compacting is 160 microns of grade piece, and is cut out as 12 centimetres of diameter.
It (3) is anode using above-mentioned sequin, metal lithium sheet is that electrode is added 0.1 and is rubbed in conventional lithium ion electrolyte
You/liter lithium nitrate be electrolyte, polypropylene screen is diaphragm, is assembled into 2032 button cells, and transfer in 0.01C multiplying power electric current
Electricity is 1.5V to open-circuit voltage, and the anode electrode piece to have discharged is taken out in glove box.
(4) it weighs 0.15 gram of knot agent Kynoar (PVDF) and is dissolved in 2 milliliters of N-Methyl pyrrolidone (NMP) solvents
In, and persistently stirred under being 500 revs/min in magnetic stirring speed, it is added after N-Methyl pyrrolidone (NMP) is completely dissolved
0.5 gram of acetylene black is added after stirring 2 hours in 0.4 gram of nanometer tin material, obtains cathode coating materials after then proceeding to stirring 3 hours
Material.
(5) slurry for obtaining step (3) is applied to 180 microns of thickness of pole piece, and in 80 degrees Celsius of drying boxes dry 6
Hour, the electrode slice and sanction for being then 150 microns using roller press rolling are the sequin that diameter is 12 centimetres.
It (6) is anode electrode using the positive sequin to have discharged that step (3) obtain, step (5) obtains tinbase roundlet
Piece is negative electrode, and the lithium nitrate that 0.1 mol/L is added in conventional lithium ion electrolyte is electrolyte, and polypropylene screen is diaphragm,
It is secondary to be assembled into 2032 button cells.
Material properties test:
Morphology characterization: the pattern test of positive electrode active materials manufactured in the present embodiment is under field emission scanning electron microscope
Test, the entitled FEI of equipment.
The battery that anode pole piece manufactured in the present embodiment is assembled into can light multiple LED light.
Chemical property and charge-discharge test:
With Li on the CHI750E electrochemical workstation that electro-chemical test characterization is produced using Shanghai Chen Hua company+/ Li is pair
Electrode and reference electrode are tested.Charge-discharge test is using the blue electric battery test system in Wuhan, the highest range of electric current, voltage
Respectively 20mA and 5V.Positive plate needed for battery assembly uses lithium sulfide electrode slice of the invention；Negative electrode tab uses nanometer tin
And carbon composite electrode；Diaphragm is polypropylene screen, model Celgard 2400；Electrolyte is 1,3- dioxa pentane and 1,2-
Dimethoxy-ethane volume ratio is the mixed liquor of 1:1, wherein the nitric acid of lithium hexafluoro phosphate and 0.1 mol/L containing 1 mol/L
Lithium.
From the pattern tests of positive electrode active materials shown in FIG. 1 in Flied emission scanning electron microscope diagram, it can be seen that just
Pole active sulfur is closely knit reticular structure, and this structure is more advantageous to the diffusion of lithium ion, improves cell electrochemical reaction speed.
From the Li of assembling shown in Fig. 22S-Sn full battery charging and discharging curve figure, it is known that, the Li of assembling2S-Sn full battery is passed through
1000 circulations, still have very high capacity retention ratio and can be seen that from charging and discharging curve by 1000 cycle battery voltages
It drops lower.
Embodiment 2:
A kind of lithium sulfide-tin full battery and preparation method thereof, specifically includes the following steps:
(1) it weighs 0.08 gram and gathers inclined fluorine difluoroethylene (PVDF) binder and slowly import and fill 2 milliliters of N- crassitudes
In ketone (NMP) solvent, after accelerating dissolution under magnetic stirring, then slowly imports 0.02 gram and gather inclined fluorine difluoroethylene (PVDF) bonding
Agent turns down revolving speed to 300 revs/min, the sulphur powder being fully ground is added after the bubble collapse after generate in solution by high-speed stirred
0.5 gram.
(2) it under lasting stirring, allows sulphur powder to be well dispersed in colloidal solution, is then slowly added into 0.4 gram of acetylene black-materials,
It adjusts revolving speed and is persistently stirred 4 hours to 500 revs/min, obtain anode sizing agent.
(3) anode sizing agent is coated in the dull surface of aluminium foil, 250 microns of coating thickness, is dried in 50 degrees Celsius of baking oven
It is 8 hours dry, it is then rolled into 200 microns of thickness and is cut into 12 centimetres of sequins.
It (4) is anode by above-mentioned sequin, metal lithium sheet is to electrode, and polypropylene screen is diaphragm, 1,3- dioxa pentane
The mixed liquor for being 1:1 with 1,2- dimethoxy-ethane volume ratio, wherein containing the lithium hexafluoro phosphate and 0.1 mol/L of 1 mol/L
Lithium nitrate be electrolyte, full of argon gas glove box in be assembled into 2032 type button cells.After battery pack installs, one is stood
It, then at low current (0.01C) deep discharge to voltage be 1.45V.It is taken again in the glove box full of argon gas with piece machine is torn open
Positive sequin is spare out.
(5) weighing 0.2 gram of polyvinylidene fluoride (PVDF) binder, to be dissolved in 2 milliliters of N-Methyl pyrrolidones (NMP) molten
In agent, 0.4 gram of nanometer tin material and 0.4 gram of acetylene black carbon material are then sequentially added, obtains cathode coating materials after stirring 3 hours
Material.
It (6) is 180 microns of dull surfaces for being coated in metal copper foil according to coating thickness by above-mentioned cathode coating slurry, then
It toasts 6 hours in the drying box that drying temperature is 90 degrees Celsius, the dried electrode after taking out baking, and is rolled using roller press
At the grade piece with a thickness of 170 microns, it is spare that 12 centimetres of sequins then are cut into slitter.
It (7) is anode with the sequin obtained in step (4), the sequin that step (6) obtains is cathode, conventional lithium ion
The lithium nitrate that 0.1 mol/L is added in electrolyte is electrolyte, and polypropylene screen is diaphragm, in the glove box clock group for being full of argon gas
Dress up 2032 button cells.
Chemical property and charge-discharge test:
Electro-chemical test characterization using Shanghai Chen Hua company production CHI750E electrochemical workstation on Li+/Li be pair
Electrode and reference electrode are tested, and ac impedance spectroscopy is as shown in Figure 5.Charge-discharge test is using the blue electric battery testing system in Wuhan
System, electric current, voltage highest range be respectively 20mA and 5V, button cell cycle characteristics curve is as shown in Figure 6.
Positive plate needed for battery assembly uses the lithium sulfide electrode slice of prelithiation of the invention；Negative electrode tab uses nanometer tin
And carbon composite electrode；Diaphragm is polypropylene pp film, model Celgard 2400；Electrolyte be 1,3- dioxa pentane and 1,
2- dimethoxy-ethane volume ratio is the mixed liquor of 1:1, wherein the nitre of lithium hexafluoro phosphate and 0.1 mol/L containing 1 mol/L
Sour lithium.
Chemical property and charge-discharge test:
With Li on the CHI750E electrochemical workstation that electro-chemical test characterization is produced using Shanghai Chen Hua company+/ Li is pair
Electrode and reference electrode are tested.Charge-discharge test is using the blue electric battery test system in Wuhan, the highest range of electric current, voltage
Respectively 20mA and 5V.Positive plate needed for battery assembly uses the lithium sulfide electrode slice of prelithiation of the invention；Negative electrode tab is adopted
With nanometer tin and carbon composite electrode；Diaphragm is polypropylene screen, model Celgard 2400；Electrolyte is 1,3- dioxa penta
Alkane and 1,2- dimethoxy-ethane volume ratio be 1:1 mixed liquor, wherein containing 1 mol/L lithium hexafluoro phosphate and 0.1 mole/
The lithium nitrate risen.
From the full battery of assembling shown in Fig. 3 in the high current charge-discharge that multiplying power electric current is 2C, recycled by 1000 times, capacity
Slowly decline, and after 1000 circulations, capacity is still very high.
Show that in 2.3V or so oxidation reaction occurs for electrode material from full battery VA characteristic curve shown in Fig. 4；In 2.2V
Reduction reaction occurs with 1.9V or so.
From the lower interface impedance of AC impedance surfacing shown in Fig. 5, it is more advantageous to interfacial mass transfer, so that battery has
Better multiplying power property.
When high current charge-discharge from prelithiation anode electrode shown in Fig. 6 in 5C, high specific capacity can be also shown, is
The full battery assembled below has preferable electrochemical properties to lay the foundation.
It shows to recycle well substantially without capacity attenuation when 0.2C is recycled from prelithiation anode electrode shown in Fig. 7
Stability lays the foundation for the relatively high circulation stability of full battery.
The multiplying power property being excellent in from the piece of prelithiation anode electrode shown in Fig. 8 mentions for the relatively high-rate characteristics of full battery
Precondition is supplied.
From the circulation Te Xintu of the button full battery of assembling shown in Fig. 9 under 0.3mA charging and discharging currents, followed by 100 times
Still there is higher capacity retention ratio after ring.
The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be said that
Specific implementation of the invention is only limited to these instructions, and others are any to be done without departing from the spirit and principles of the present invention
Change, substitution, combination, simplification, simple deduction or replace should be equivalent substitute mode, all shall be regarded as belonging to the present invention
Protection scope.
Claims (10)
1. a kind of lithium sulfide-tin full battery preparation method, which comprises the following steps:
(1) according to sulphur powder: conductive agent: binder mass ratio be (5-7): (2-4): the ratio of (0.5-1.5) by sulphur powder, lead
Then slurry is coated on metal aluminum foil by electric agent and binder making at slurry, dry later, tabletting is simultaneously assembled into half-cell
Low discharging current is carried out, lithium sulfide anode electrode is obtained；
(2) according to nanometer tin material: conductive carbon: binder mass ratio is (3-6): (4-7): the ratio of (1-3) is by nanometer tin
Then slurry is coated on copper foil by material, conductive carbon and binder making at slurry, tabletting after drying obtains cathode pole piece；
(3) lithium sulfide anode electrode and cathode pole piece are assembled into lithium sulfide-tin full battery.
2. lithium sulfide according to claim 1-tin full battery preparation method, which is characterized in that in the step (1) just
The specific preparation method of pole coating slurry: the weighed binder is dissolved in N-Methyl pyrrolidone in two times, and
It is stirred under different mixing speeds twice, second of mixing speed is lower than first time mixing speed, until binder is completely dissolved；It will
The conductive agent pours into above-mentioned mixed solution, after uniform stirring 2-5 hours, is added and weighs sulphur that is good and being fully ground
Powder at the uniform velocity stirs 2-10 hours under certain speed of agitator, obtains obtaining no granular sensation anode coating slurry spare.
3. lithium sulfide according to claim 2-tin full battery preparation method, which is characterized in that the anode pole piece
Specific preparation method: coating slurry positive in step (1) is coated uniformly on metal aluminum foil, coating thickness is that 150-250 is micro-
Rice, then dry under 50 degrees Celsius to 80 degrees Celsius, drying time is 2 hours to 10 hours, after obtaining dry cathode pole piece,
Pole piece is rolled into the pole piece for 120-230 microns again, then using lithium metal as cathode, 2032 batteries is assembled into, discharges into open circuit
Voltage is 1.45V, and the anode pole piece taken out after having discharged is lithium sulfide anode electrode.
4. lithium sulfide according to claim 1-tin full battery preparation method, which is characterized in that born in the step (2)
The specific preparation method of pole coating slurry: the weighed binder is dissolved in N-Methyl pyrrolidone in two times, and
It is stirred under different mixing speeds twice, second of mixing speed is lower than first time mixing speed, until binder is completely dissolved；It will
The conductive carbon is poured into above-mentioned mixed solution, after uniform stirring 2-5 hours, is added and is weighed nanometer tin that is good and being fully ground
Material at the uniform velocity stirs 2-10 hours under certain speed of agitator, obtains obtaining no granular sensation slurry spare.
5. lithium sulfide according to claim 4-tin full battery preparation method, which is characterized in that the cathode pole piece
Specific preparation method: cathode coating slurry in step (2) is coated uniformly on metal copper foil, and coating thickness is that 120-200 is micro-
Rice, then dry under 60 degrees Celsius to 100 degrees Celsius, drying time is 2 hours to 10 hours, obtains dry cathode pole piece
Afterwards, then by pole piece the cathode pole piece for 80-160 microns is rolled.
6. lithium sulfide according to any one of claims 1 to 5-tin full battery preparation method, which is characterized in that described
Conductive agent is at least one of Super P and acetylene black.
7. lithium sulfide according to any one of claims 1 to 5-tin full battery preparation method, which is characterized in that described viscous
Knot agent is to gather inclined fluorine difluoroethylene.
8. lithium sulfide according to claim 2-tin full battery preparation method, which is characterized in that two in the step (1)
Binder interval time is added when secondary dissolution no more than 2 hours, first time mixing speed is 400-1000 revs/min, second
Mixing speed is 100-500 revs/min.
9. a kind of according to claim 1 to lithium sulfide-tin full battery made of any one of 8 preparation methods.
10. lithium sulfide as claimed in claim 9-tin full battery is in the application of energy storage field.
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Application publication date: 20190510 |