CN107994232A - A kind of lithium-sulfur cell carrier material - Google Patents
A kind of lithium-sulfur cell carrier material Download PDFInfo
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- CN107994232A CN107994232A CN201711177865.5A CN201711177865A CN107994232A CN 107994232 A CN107994232 A CN 107994232A CN 201711177865 A CN201711177865 A CN 201711177865A CN 107994232 A CN107994232 A CN 107994232A
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Abstract
The invention belongs to lithium-sulfur cell technical field, more particularly to a kind of lithium-sulfur cell carrier material, including be interweaved by carbon nanotubes the spherical carbon skeleton being wound and be coated on spherical carbon skeleton outer surface amorphous carbon layer；The average diameter of spherical carbon skeleton is 0.1 μm 4 μm, and the thickness of amorphous carbon layer is 0.1nm 10nm；The porosity of spherical carbon skeleton is 20% 60%.Relative to the prior art, the present invention passes through flexible, controllable, simple preparation method, a kind of spherical composite material of carbon nanotubes micron with abundant hierarchical pore structure is obtained, carbon nanotubes is mutually wound conductive network with good conductivity, its raw material sources is extensive and cheap.When the carbon nanotubes micron ball and sulphur composite material are applied among lithium-sulfur cell, the introducing of carbon nanotubes micron ball can solve the problems, such as lithium-sulfur cell to a certain extent, loose structure can receiving volume expansion, the carbon nanotubes micron ball of stratification can also reduce the shuttle effect of polysulfide.
Description
Technical field
The invention belongs to lithium-sulfur cell technical field, more particularly to a kind of lithium-sulfur cell carrier material.
Background technology
With increase of the people to the demand of energy consumption, while fossil energy is largely consumed, also generate serious
Environmental pollution.More and more notices are put into the regenerative resource of discovery and development environmental protection, and lithium-sulfur cell is as one
Kind reusable energy device, due to its high energy density, relatively low price and environmental-friendly pollution-free and be subject to
The extensive concern of people.But the energy density of lithium-sulfur cell and power density cannot still meet power battery and large-scale at this stage
The requirement of energy storage device.Therefore, a kind of battery system with high energy density is designed and prepared, is had great importance.
But the commercial applications of lithium-sulfur cell have been also faced with the problem of many.The electric conductivity of sulphur first is extremely low, as filling
The drawbacks of active material that discharges is natural, next sulphur has about 80% or so volume change in charge and discharge process, easily broken
The overall structure of bad battery, more seriously intermediate product polysulfide of the lithium-sulfur cell formed in charge and discharge process be
Solubility, easily shuttle reduces the utilization rate of active material in positive and negative anodes, causes capacity rapid decay.
In view of this, the present invention is intended to provide a kind of lithium-sulfur cell carrier material, carbon nanotubes therein are mutually wound
The carbon skeleton with satisfactory electrical conductivity with good sphericity is formed, and substantial amounts of hole is formed therein.This some holes
Gap can effectively alleviate volumetric expansion of the lithium-sulfur cell in charge and discharge process, while these holes are also lithium ion and electrolysis
The transmission of liquid provides effective path, and the carbon nanotubes of winding can suppress the shuttle effect of polysulfide to a certain extent
Should, the carbon nanotubes of interconnection greatly improves the migration velocity of electronics.Therefore, the carbon nanotubes micron ball and sulphur are answered
Condensation material, which is applied among lithium-sulfur cell, has preferable chemical property.
The content of the invention
It is an object of the present invention to：In view of the deficiencies of the prior art, a kind of lithium-sulfur cell carrier material is provided
Material, carbon nanotubes therein are mutually wound the carbon skeleton with satisfactory electrical conductivity with good sphericity, and at it
In form substantial amounts of hole.These holes can effectively alleviate volumetric expansion of the lithium-sulfur cell in charge and discharge process, at the same time
These holes also provide effective path for the transmission of lithium ion and electrolyte, and the carbon nanotubes of winding can be in certain journey
Suppress the shuttle effect of polysulfide on degree, the carbon nanotubes of interconnection greatly improves the migration velocity of electronics.Therefore,
The carbon nanotubes micron ball and sulphur composite material, which are applied among lithium-sulfur cell, has preferable chemical property.
In order to achieve the above object, the present invention adopts the following technical scheme that：
A kind of lithium-sulfur cell carrier material, including be interweaved by carbon nanotubes the spherical carbon skeleton that is wound and
It is coated on the amorphous carbon layer of the outer surface of the spherical carbon skeleton；The average diameter of the spherical carbon skeleton is 0.1 μm of -4 μ
M, the thickness of the amorphous carbon layer is 0.1nm-10nm；The porosity of the spherical carbon skeleton is 20%-60%；
The preparation method of the carrier material includes at least following steps：
The first step, is configured to the aqueous solution that concentration is 0.001g/mL~0.005g/mL, to the water by high-molecular compound
Carbon nanotubes is added in solution, heating stirring is uniform, forms suspension；
Second step, surfactant is added in organic solvent, is stirred evenly, and obtains surfactant solution；
3rd step, the suspension of the first step is added in surfactant solution, is heated while stirring, is evaporated, is obtained
Micron ball presoma；
4th step, oxidation processes, carbonization treatment are carried out to the micron ball presoma obtained by the 3rd step successively, are obtained described
Lithium-sulfur cell carrier material；
The organic solvent be and the immiscible solvent of water.
Relative to the prior art, by flexible, controllable, simple preparation method, obtained one kind has the present invention
The spherical composite material of carbon nanotubes micron of abundant hierarchical pore structure, carbon nanotubes is mutually wound with good conductivity
Conductive network, can be used as lithium-sulphur cell positive electrode carrier, its raw material sources is extensive and cheap.The carbon nanotubes is micro-
When rice ball and sulphur composite material are applied among lithium-sulfur cell, the introducing of carbon nanotubes micron ball can solve to a certain extent
The problem of lithium-sulfur cell, loose structure can receiving volume expansion, the carbon nanotubes micron ball of stratification can also reduce more sulphur
The shuttle effect of compound.Further, since carbon nanotubes micron ball has good electric conductivity, so as to enhance lithium ion and electricity
The transmission rate of son, its preparation process cost is low and simple and practicable, is obtained using the carbon nanotubes micron ball and sulphur composite material
The lithium-sulfur cell arrived has preferable capacity retention ratio, has preferable application prospect.
Compared with prior art, carbon nanotubes is intertwined by the present invention using cleverly method, is prepared for carbon nanometer
Pipe sphere material.The preparation method is the immiscible property using organic solvent and water, will using solvent immiscible with water
Small water droplet dissolved with carbon nanotubes and high-molecular compound wraps up, and is then evaporated moisture using heating stirring, obtains
The carbon nanotubes micron ball presoma that carbon nanotubes is intertwined, during subsequent oxidation and carbonization, macromolecule chemical combination
Thing cracks to form a small amount of agraphitic carbon.Carbon nanotubes is mutually wound the carbon bone with good sphericity, satisfactory electrical conductivity
Frame, and substantial amounts of hole is formd during this period, these holes can effectively alleviate lithium-sulfur cell in charge and discharge process
Volumetric expansion, or the transmission of lithium ion and electrolyte provides effective path, and the carbon nanotubes of winding can be certain
Suppress the shuttle effect of polysulfide in degree, the carbon nanotubes of interconnection greatly improves the migration velocity of electronics.Cause
This, the carbon nanotubes micron ball of the present invention and sulphur composite material, which are applied among lithium-sulfur cell, has preferable electrochemistry
Energy.
As lithium-sulfur cell carrier material of the present invention one kind improve, the organic solvent for n-dodecane, octane,
At least one of cyclohexanone, ethyl acetate and petroleum ether.These types of solvent and water are immiscible, or compatibility is very poor, is easy to
Small water droplet dissolved with carbon nanotubes and high-molecular compound is wrapped up.
One kind as lithium-sulfur cell carrier material of the present invention is improved, and the high-molecular compound is polyvinyl alcohol, gathers
At least one of acrylic acid, polyvinylpyrrolidone, these high-molecular compounds are water-soluble and after the sintering can
Form the surface that amorphous carbon is coated on carbon skeleton.
One kind as lithium-sulfur cell carrier material of the present invention is improved, the carbon nanotubes and the macromolecule chemical combination
The mass ratio of thing is (0.1-10)：1.High molecular amount is fewer, so as to only be formed on the surface of carbon skeleton a small amount of, very thin
One layer of amorphous carbon.
One kind as lithium-sulfur cell carrier material of the present invention is improved, and the surfactant is anhydrous sorbitol oil
At least one of acid esters, alkylphenol polyoxyethylene ether, ethoxylated dodecyl alcohol, cocinic acid and laurate.
One kind as lithium-sulfur cell carrier material of the present invention is improved, in second step, surfactant and organic solvent
Volume ratio be 1:(200-300)；The volume ratio of suspension and surfactant solution is 1：(1-10).
One kind as lithium-sulfur cell carrier material of the present invention is improved, and the heating-up temperature of the first step and the 3rd step is 70-
100 DEG C, the duration of stirring is 1.5h-3h.
One kind as lithium-sulfur cell carrier material of the present invention is improved, and the oxidation processes carry out in atmosphere, first with
The programming rate of 2-10 DEG C/min is warming up to 150-300 DEG C, then keeps the temperature 1-3h.Low-temperature oxidation processing can realize structure
Stabilize.
One kind as lithium-sulfur cell carrier material of the present invention is improved, and the carbonization treatment is in argon gas atmosphere or nitrogen
Carried out under atmosphere, be first warming up to 500 DEG C -700 DEG C with the programming rate of 2-10 DEG C/min, then keep the temperature 1-3h at such a temperature,
Carbonization treatment can cause high-molecular compound to become amorphous carbon.
It is another object of the present invention to provide the positive active material carrier that a kind of carrier material is used as lithium-sulfur cell
Or the purposes of negative electrode active material carrier.The carrier can both load positive electrode material, such as lithium simple substance, lithium compound, can also
Load negative material, such as sulphur, sulphur compound, sulfur compound.
Brief description of the drawings
Fig. 1 is one of scanning electron microscope (SEM) photograph of carrier material of the embodiment of the present invention 1.
Fig. 2 is the two of the scanning electron microscope (SEM) photograph of the carrier material of the embodiment of the present invention 1.
Embodiment
Technical scheme, but protection scope of the present invention not limited to this are illustrated with specific embodiment below.
Embodiment 1
A kind of lithium-sulfur cell carrier material is present embodiments provided, including is interweaved and is wound by carbon nanotubes
Spherical carbon skeleton and be coated on spherical carbon skeleton outer surface amorphous carbon layer；The average diameter of spherical carbon skeleton is 0.1
μm -4 μm, the thickness of amorphous carbon layer is 0.1nm-10nm；The porosity of spherical carbon skeleton is 40%；
The preparation method of carrier material includes at least following steps：
The first step, the polyvinyl alcohol that the molecular weight of 0.2g is 10000-40000 is added in 80mL water, 90 DEG C of heating
Two hours are stirred to polyvinyl alcohol all dissolvings, obtain polyvinyl alcohol settled solution；The carbon that 2g mass fractions are 5% is received
After being stirred one hour at 70 DEG C in the mitron slurry addition poly-vinyl alcohol solution, ultrasonic two hours, black even is obtained
Suspension；
Second step, 1mL surfactant sorbitan monooleates are added in 240mL organic solvent n-dodecanes,
Stir evenly, obtain surfactant solution；
3rd step, the suspension of the first step is added in surfactant solution, is heated while stirring, is evaporated, to institute
Product is centrifuged, and cleaned 3 times with water and ethanol, after carbon nanotubes micron ball forerunner is dried to obtain in 80 DEG C of baking ovens
Body；
4th step, carries out oxidation processes, carbonization treatment to the micron ball presoma obtained by the 3rd step, obtains lithium sulphur successively
Battery carrier material；Wherein, the step of oxidation processes are：The carbon nanotubes micron ball presoma of preparation is placed in Muffle furnace
In with the programming rate of 5 DEG C/min be warming up to 200 DEG C, when insulation 1 is small, then 280 DEG C are warming up to the programming rate of 5 DEG C/min,
Keep the temperature 1 it is small when pre-oxidized after carbon nanotubes micron ball.The step of carbonization treatment is：The carbon obtained after pre-oxidation is received
Mitron micron ball is placed in argon gas (purity>99.999%) under atmosphere, 600 DEG C are warming up to the programming rate of 5 DEG C/min, insulation 2
Hour, obtain carbon nanotubes sphere material after natural cooling.
The scanning electron microscope (SEM) photograph of the carbon nanotubes sphere material as depicted in figs. 1 and 2, can be seen that by Fig. 1 and Fig. 2：Should
Material has abundant hierarchical pore structure, and carbon nanotubes is mutually wound conductive network with good conductivity.
Embodiment 2
A kind of lithium-sulfur cell carrier material is present embodiments provided, including is interweaved and is wound by carbon nanotubes
Spherical carbon skeleton and be coated on spherical carbon skeleton outer surface amorphous carbon layer；The average diameter of spherical carbon skeleton is 0.1
μm -4 μm, the thickness of amorphous carbon layer is 0.1nm-10nm；The porosity of spherical carbon skeleton is 30%；
The preparation method of carrier material includes at least following steps：
The first step, the polyacrylic acid that the molecular weight of 0.3g is 10000-40000 is added in 80mL water, 80 DEG C of heating
Two hours are stirred to polyacrylic acid all dissolvings, obtain polyacrylic acid settled solution；The carbon that 4g mass fractions are 5% is received
After being stirred one hour at 80 DEG C in the mitron slurry addition polyacrylic acid solution, ultrasonic two hours, black even is obtained
Suspension；
Second step, 1mL surfactant alkylphenol polyoxyethylene ether is added in 260mL organic solvent cyclohexanone, is stirred
Mix uniformly, obtain surfactant solution；
3rd step, the suspension of the first step is added in surfactant solution, is heated while stirring, is evaporated, to institute
Product is centrifuged, and cleaned 3 times with water and ethanol, after carbon nanotubes micron ball forerunner is dried to obtain in 90 DEG C of baking ovens
Body；
4th step, carries out oxidation processes, carbonization treatment to the micron ball presoma obtained by the 3rd step, obtains lithium sulphur successively
Battery carrier material；Wherein, the step of oxidation processes are：The carbon nanotubes micron ball presoma of preparation is placed in Muffle furnace
In with the programming rate of 7 DEG C/min be warming up to 180 DEG C, when insulation 1.5 is small, then 250 are warming up to the programming rate of 7 DEG C/min
DEG C, insulation 1.5 it is small when pre-oxidized after carbon nanotubes micron ball.The step of carbonization treatment is：By what is obtained after pre-oxidation
Carbon nanotubes micron ball is placed in nitrogen (purity>99.999%) under atmosphere, 650 DEG C are warming up to the programming rate of 7 DEG C/min,
Keep the temperature 2.5 it is small when, obtain carbon nanotubes sphere material after natural cooling.
Embodiment 3
A kind of lithium-sulfur cell carrier material is present embodiments provided, including is interweaved and is wound by carbon nanotubes
Spherical carbon skeleton and be coated on spherical carbon skeleton outer surface amorphous carbon layer；The average diameter of spherical carbon skeleton is 0.1
μm -4 μm, the thickness of amorphous carbon layer is 0.1nm-10nm；The porosity of spherical carbon skeleton is 50%；
The preparation method of carrier material includes at least following steps：
The first step, the polyvinylpyrrolidone that the molecular weight of 0.5g is 10000-40000 is added in 80mL water, 80
DEG C two hours of heating stirring all dissolve to polyvinylpyrrolidone, obtain polyvinylpyrrolidone settled solution；By 10g
Mass fraction be 5% carbon nano tube paste add in the polyvinylpyrrolidonesolution solution and stirred one hour at 85 DEG C after,
Ultrasonic two hours, obtain black even suspension；
Second step, 1mL surfactant ethoxylated dodecyl alcohols are added in 220mL organic solvent cyclohexanone, are stirred
Mix uniformly, obtain surfactant solution；
3rd step, the suspension of the first step is added in surfactant solution, is heated while stirring, is evaporated, to institute
Product is centrifuged, and cleaned 3 times with water and ethanol, after carbon nanotubes micron ball forerunner is dried to obtain in 85 DEG C of baking ovens
Body；
4th step, carries out oxidation processes, carbonization treatment to the micron ball presoma obtained by the 3rd step, obtains lithium sulphur successively
Battery carrier material；Wherein, the step of oxidation processes are：The carbon nanotubes micron ball presoma of preparation is placed in Muffle furnace
In with the programming rate of 3 DEG C/min be warming up to 190 DEG C, when insulation 1.2 is small, then 240 are warming up to the programming rate of 3 DEG C/min
DEG C, insulation 1.2 it is small when pre-oxidized after carbon nanotubes micron ball.The step of carbonization treatment is：By what is obtained after pre-oxidation
Carbon nanotubes micron ball is placed in nitrogen (purity>99.999%) under atmosphere, 640 DEG C are warming up to the programming rate of 3 DEG C/min,
Keep the temperature 2.2 it is small when, obtain carbon nanotubes sphere material after natural cooling.
Embodiment 4
A kind of lithium-sulfur cell carrier material is present embodiments provided, including is interweaved and is wound by carbon nanotubes
Spherical carbon skeleton and be coated on spherical carbon skeleton outer surface amorphous carbon layer；The average diameter of spherical carbon skeleton is 0.1
μm -4 μm, the thickness of amorphous carbon layer is 0.1nm-10nm；The porosity of spherical carbon skeleton is 45%；
The preparation method of carrier material includes at least following steps：
The first step, the polyvinyl alcohol that the molecular weight of 0.2g is 10000-40000 is added in 80mL water, 85 DEG C of heating
Two hours are stirred to polyvinyl alcohol all dissolvings, obtain polyvinyl alcohol settled solution；The carbon that 20g mass fractions are 5% is received
After mitron slurry is added when stirring 2 is small at 75 DEG C in the poly-vinyl alcohol solution, ultrasonic 3 hours, obtain black even and hang
Turbid；
Second step, 1mL surfactant cocinic acids are added in 220mL organic solvent octanes, stirs evenly, obtains
To surfactant solution；
3rd step, the suspension of the first step is added in surfactant solution, is heated while stirring, is evaporated, to institute
Product is centrifuged, and cleaned 5 times with water and ethanol, after carbon nanotubes micron ball forerunner is dried to obtain in 75 DEG C of baking ovens
Body；
4th step, carries out oxidation processes, carbonization treatment to the micron ball presoma obtained by the 3rd step, obtains lithium sulphur successively
Battery carrier material；Wherein, the step of oxidation processes are：The carbon nanotubes micron ball presoma of preparation is placed in Muffle furnace
In with the programming rate of 9 DEG C/min be warming up to 200 DEG C, when insulation 0.8 is small, then 290 are warming up to the programming rate of 9 DEG C/min
DEG C, insulation 0.8 it is small when pre-oxidized after carbon nanotubes micron ball.The step of carbonization treatment is：By what is obtained after pre-oxidation
Carbon nanotubes micron ball is placed in argon gas (purity>99.999%) under atmosphere, 680 DEG C are warming up to the programming rate of 8 DEG C/min,
Keep the temperature 1.8 it is small when, obtain carbon nanotubes sphere material after natural cooling.
Embodiment 5
A kind of lithium-sulfur cell carrier material is present embodiments provided, including is interweaved and is wound by carbon nanotubes
Spherical carbon skeleton and be coated on spherical carbon skeleton outer surface amorphous carbon layer；The average diameter of spherical carbon skeleton is 0.1
μm -4 μm, the thickness of amorphous carbon layer is 0.1nm-10nm；The porosity of spherical carbon skeleton is 55%；
The preparation method of carrier material includes at least following steps：
The first step, the polyvinyl alcohol that the molecular weight of 0.2g is 10000-40000 is added in 80mL water, 75 DEG C of heating
Two hours are stirred to polyvinyl alcohol all dissolvings, obtain polyvinyl alcohol settled solution；The carbon that 15g mass fractions are 5% is received
After mitron slurry is added when stirring 2 is small at 75 DEG C in the poly-vinyl alcohol solution, ultrasonic 3 hours, obtain black even and hang
Turbid；
Second step, 1mL surfactant laurate is added in 320mL organic solvent octanes, stirs evenly, obtains
Surfactant solution；
3rd step, the suspension of the first step is added in surfactant solution, is heated while stirring, is evaporated, to institute
Product is centrifuged, and cleaned 4 times with water and ethanol, after carbon nanotubes micron ball forerunner is dried to obtain in 85 DEG C of baking ovens
Body；
4th step, carries out oxidation processes, carbonization treatment to the micron ball presoma obtained by the 3rd step, obtains lithium sulphur successively
Battery carrier material；Wherein, the step of oxidation processes are：The carbon nanotubes micron ball presoma of preparation is placed in Muffle furnace
In with the programming rate of 2 DEG C/min be warming up to 240 DEG C, when insulation 1 is small, then 270 DEG C are warming up to the programming rate of 2 DEG C/min,
Keep the temperature 1.1 it is small when pre-oxidized after carbon nanotubes micron ball.The step of carbonization treatment is：The carbon that will be obtained after pre-oxidation
Nanotube micron ball is placed in argon gas (purity>99.999%) under atmosphere, 670 DEG C is warming up to the programming rate of 4 DEG C/min, is protected
When temperature 2.8 is small, carbon nanotubes sphere material is obtained after natural cooling.
The carbon nanotubes sphere material of embodiment 1 to 5 and sulphur are prepared into sulphur carbon composite：By grinding carbon
Nanotube sphere material and sulphur powder are with mass ratio 4:6 mixing, when processing 12 is small at 155 DEG C, and locate at 200 DEG C
The 30 minutes sulphur for removing excess surface of reason, obtains sulphur carbon composite.
By sulphur carbon composite, conductive additive conductive black and binding agent Kynoar (PVDF) according to mass ratio
80:10:10 are uniformly mixed, and add organic solvent 1-methyl-2-pyrrolidinone (NMP) and obtain anode sizing agent.Anode sizing agent is coated
In on copper foil, after drying, rolling film and punching processing, positive pole plate of lithium-sulfur cell is obtained.
The positive pole plate of lithium-sulfur cell being prepared, lithium piece are made as to electrode and reference electrode, Clegard2500
For membrane, 2032 type button cells are assembled into high-purity argon glove box, numbering is S1-S5 respectively.
As a comparison, by sulphur powder, conductive additive conductive black and binding agent Kynoar (PVDF) according to mass ratio
80:10:10 are uniformly mixed, and add organic solvent 1-methyl-2-pyrrolidinone (NMP) and obtain anode sizing agent.Anode sizing agent is coated
In on copper foil, after drying, rolling film and punching processing, positive pole plate of lithium-sulfur cell as a comparison is obtained.By the lithium-sulfur cell
Anode pole piece, lithium piece are used as and electrode and reference electrode, Clegard2500 are assembled into as membrane in high-purity argon glove box
2032 type button cells, numbering D1.
Using blue electric equipment be S1-S5 to numbering and the button cell of D1 carries out constant current charge-discharge performance test, discharge and recharge
Voltage range scope is 1.7-2.8V.Test its first reversible capacity, coulombic efficiency and circulation 100 times after reversible capacity, institute
1 must be the results are shown in Table.
Table 1：Numbering is S1-S5 and the test result of the button cell of D1.
As can be seen from Table 1：First reversible capacity of the lithium-sulfur cell of carrier material using the present invention with higher,
Coulombic efficiency and reversible capacity, this shows that the lithium-sulfur cell of carrier material using the present invention has more preferable electrical property.
According to the disclosure and teachings of the above specification, those skilled in the art in the invention can also be to above-mentioned implementation
Mode make a change and modification.Therefore, the invention is not limited in embodiment disclosed and described above, to this hair
Some bright modifications and changes should also be as falling into the scope of the claims of the present invention.In addition, although in this specification
Some specific terms are used, but these terms are merely for convenience of description, do not limit the present invention in any way.
Claims (10)
- A kind of 1. lithium-sulfur cell carrier material, it is characterised in that：Including be interweaved by carbon nanotubes be wound it is spherical Carbon skeleton and be coated on the spherical carbon skeleton outer surface amorphous carbon layer；The average diameter of the spherical carbon skeleton is 0.1 μm -4 μm, the thickness of the amorphous carbon layer is 0.1nm-10nm；The porosity of the spherical carbon skeleton is 20%-60%；The preparation method of the carrier material includes at least following steps：The first step, is configured to aqueous solution of the concentration for the g/mL of 0.001g/mL~0.005, to the aqueous solution by high-molecular compound Middle addition carbon nanotubes, heating stirring is uniform, forms suspension；Second step, surfactant is added in organic solvent, is stirred evenly, and obtains surfactant solution；3rd step, the suspension of the first step is added in surfactant solution, is heated while stirring, is evaporated, obtains micron Ball presoma；4th step, oxidation processes, carbonization treatment are carried out to the micron ball presoma obtained by the 3rd step successively, obtain the lithium sulphur electricity Pond carrier material；The organic solvent be and the immiscible solvent of water.
- 2. lithium-sulfur cell carrier material according to claim 1, it is characterised in that：The organic solvent is positive 12 At least one of alkane, octane, cyclohexanone, ethyl acetate and petroleum ether.
- 3. lithium-sulfur cell carrier material according to claim 1, it is characterised in that：The high-molecular compound is poly- second At least one of enol, polyacrylic acid, polyvinylpyrrolidone.
- 4. lithium-sulfur cell carrier material according to claim 1, it is characterised in that：The carbon nanotubes and the high score The mass ratio of sub- compound is（0.1-10）：1.
- 5. lithium-sulfur cell carrier material according to claim 1, it is characterised in that：The surfactant is dehydration mountain At least one of pears alcohol oleate, alkylphenol polyoxyethylene ether, ethoxylated dodecyl alcohol, cocinic acid and laurate.
- 6. lithium-sulfur cell carrier material according to claim 1, it is characterised in that：In second step, surfactant with The volume ratio of organic solvent is 1:（200-300）；The volume ratio of suspension and surfactant solution is 1：（1-10）.
- 7. lithium-sulfur cell carrier material according to claim 1, it is characterised in that：The heating temperature of the first step and the 3rd step Spend for 70-100 DEG C, the duration of stirring is 1.5h-3h.
- 8. lithium-sulfur cell carrier material according to claim 1, it is characterised in that：The oxidation processes in atmosphere into OK, 150-300 DEG C first is warming up to the programming rate of 2-10 DEG C/min, then keeps the temperature 1-3 h.
- 9. lithium-sulfur cell carrier material according to claim 1, it is characterised in that：The carbonization treatment is in argon gas atmosphere Or carried out under nitrogen atmosphere, 500 DEG C -700 DEG C first are warming up to the programming rate of 2-10 DEG C/min, is then kept the temperature at such a temperature 1-3 h。
- 10. a kind of claim 1 to 9 any one of them carrier material is used as the positive active material carrier or negative of lithium-sulfur cell The purposes of pole active ingredient carriers.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711177865.5A CN107994232B (en) | 2017-11-23 | 2017-11-23 | Carrier material for lithium-sulfur battery |
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| CN201711177865.5A CN107994232B (en) | 2017-11-23 | 2017-11-23 | Carrier material for lithium-sulfur battery |
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| CN107994232A true CN107994232A (en) | 2018-05-04 |
| CN107994232B CN107994232B (en) | 2020-07-03 |
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