CN108682813A - A kind of preparation method and application of Si-C composite material - Google Patents
A kind of preparation method and application of Si-C composite material Download PDFInfo
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- CN108682813A CN108682813A CN201810445606.4A CN201810445606A CN108682813A CN 108682813 A CN108682813 A CN 108682813A CN 201810445606 A CN201810445606 A CN 201810445606A CN 108682813 A CN108682813 A CN 108682813A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/362—Composites
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/362—Composites
- H01M4/366—Composites as layered products
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/38—Selection of substances as active materials, active masses, active liquids of elements or alloys
- H01M4/386—Silicon or alloys based on silicon
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/624—Electric conductive fillers
- H01M4/625—Carbon or graphite
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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
Abstract
The invention discloses a kind of preparation method and applications of Si-C composite material, include the following steps：(1) it after mixing nano silica fume, surfactant and organic solvent, is ultrasonically treated, obtains suspension；(2) above-mentioned suspension is mixed with polybenzazole precursor liquid solution, after supersound process, solvent evaporated obtains the nano silica fume of surface coated polymer；(3) high-energy ball milling is carried out after mixing the nano silica fume of the surface coated polymer obtained by step (2) and graphite；(4) material obtained by step (3) is subjected to high temperature cabonization processing；(5) material obtained by step (4) is subjected to chemical vapor deposition, obtains the Si-C composite material.The present invention will be carried out with graphite by high-energy ball milling compound again after nano silica fume surfactant and polymer treatment so that nano silica fume is evenly distributed in graphite；Silica flour can give full play to the advantage of its nano-scale, alleviate the capacity attenuation caused by huge volume change in charge and discharge process.
Description
Technical field
The invention belongs to technical field of lithium ion, and in particular to a kind of preparation method of Si-C composite material and answer
With.
Background technology
With the development of modern society, electric vehicle and advanced electronic equipment are to battery high energy metric density and excellent cycling
The requirement of energy is higher and higher, and graphite is by its theoretical specific capacity (372mAh g-1) limitation, cannot gradually meet society need
It asks, finding suitable negative material becomes being increasingly urgent to for task.Silicon based anode material has up to 4200mAh g-1Reason
It is 10 times of conventional graphite, it is resourceful in nature, pollution-free, low to lithium current potential, is widely closed by specific capacity
Note.But the electric conductivity of silicon materials is poor, significant volume change occurs during embedding de- lithium, the mechanical stress of generation can destroy electricity
Pole structure, the gradual dusting of electrode material on collector simultaneously fall off, make to lose electrical contact between active material and collector, simultaneously
It also results in and constantly forms new SEI films, lead to lower coulombic efficiency and quick capacity attenuation in cyclic process.Research knot
Fruit shows that the nanostructures such as nano silicon particles, silicon nanowires, nano-tube can effectively alleviate the volume expansion of silica-base material.
But these nanostructures have larger surface energy, easily reunite so that the advantage of nanostructure good cannot embody
Come.Currently, focusing on how nano silicon material being scattered in conducting base to silica-base material research, reduces it and recycling
Reunion in the process, while in its coated with carbon bed, reducing contact of the nano silicon material directly with electrolyte, inhibiting SEI films
Continuous formation.
Carbon material has preferable cyclical stability, good conductivity, and volume change is relatively in charge and discharge process
It is small, but its embedding lithium capacity is relatively low.Selection carbon can not only improve the electric conductivity of composite material as conducting base but also can be about
Volume change of the beam silicon in charge and discharge process, can thus prevent the rupture of electrode material, prevent it from falling off from collector,
Carbon nanotube, carbon nano-fiber, porous carbon, graphene and their compound are all common conductive matrices, but mostly
Prepare difficult, at high price, unsuitable large batch of industrial production.Representative of the graphite as carbon material, because of the cycle longevity of its length
Life, abundant energy resource supply and rather low cost become the lithium ion battery negative material of current practice.With graphite
For conducting base, nano silicon material is scattered in graphite matrix, the silicon-carbon obtained from nano silicon material coated with carbon bed
Composite material is expected to the silicon-carbon cathode material as height ratio capacity and excellent cycling stability.
There are many ways to preparing Si-C composite material, including high-energy ball milling, Pintsch process, chemical vapour deposition technique, splash
Penetrate sedimentation, vapour deposition method etc., most production cost is excessively high in complex method, can not mass produce, using it is more be first three
Person.Nano silica fume can be uniformly dispersed in graphite matrix by high-energy ball milling, but after high-energy ball milling is handled, composite material
Specific surface area increase, cause lower first circle coulombic efficiency.High-temperature cracking method usually selects organic polymer as before carbon containing
Body is driven, carbon matrix precursor will be contained and silica flour is compound, by high-temperature process, nano silica fume is by organic polymer in the composite material of acquisition
The amorphous carbon connection being cracked to form, surface coats one layer of amorphous carbon, but the unformed of Pintsch process generation cannot be complete
Graphitic carbon material excellent stability and electric conductivity, and the amorphous carbon large specific surface area generated are shown, it is difficult to obtain performance
Excellent Si-C composite material.Chemical vapour deposition technique can uniformly coat one layer of amorphous carbon on Si-C composite material surface,
But the amorphous carbon generated can only carry out surface cladding to nano silica fume, it cannot be well by the particle in Si-C composite material
It connects.
Invention content
It is an object of the invention to overcome prior art defect, a kind of preparation method of Si-C composite material is provided.
Another object of the present invention is to provide the applications of Si-C composite material prepared by above-mentioned preparation method.
Technical scheme is as follows：
A kind of preparation method of Si-C composite material, includes the following steps：
(1) after mixing nano silica fume, surfactant and organic solvent, in 55~65kHz of supersonic frequency, ultrasonic power
10~200W L-1Under carry out 1~30min of supersound process, obtain suspension；
(2) above-mentioned suspension is mixed with polybenzazole precursor liquid solution, in 55~65kHz of supersonic frequency, ultrasonic power 10
~200W L-1Under carry out 5~120min of supersound process after, solvent evaporated obtains the nano silica fume of surface coated polymer；It is above-mentioned
Polymer includes at least one of phenolic resin, polyaniline, polypyrrole and polyvinylidene fluoride；
(3) high-energy ball milling, ball are carried out after mixing the nano silica fume of the surface coated polymer obtained by step (2) and graphite
Expect ratio 3: 1~15: 1, rotating speed 600r min-1~2000r min-1, 1~9h of time；
(4) material obtained by step (3) is subjected to high temperature cabonization in 600~1000 DEG C and handles 1~10h；
(5) material obtained by step (4) is subjected to chemical vapor deposition, obtains the Si-C composite material, the chemistry gas
Mutually the air source of deposition is made of carbon-source gas and argon gas, and the throughput of carbon-source gas is 5~100mL min-1, chemical vapor deposition
Temperature be 600~1000 DEG C, the time be 0.1~6h, above-mentioned carbon-source gas be CH4、C2H2And C3H8At least one of.
In a preferred embodiment of the invention, the grain size of the nano silica fume is 10~100nm.
In a preferred embodiment of the invention, the surfactant is sodium lignin sulfonate, detergent alkylate
At least one of sodium sulfonate, lauryl sodium sulfate and polyvinylpyrrolidone.
The organic solvent includes absolute ethyl alcohol and NMP.
In a preferred embodiment of the invention, polymer in the nano silica fume of the surface coated polymer
Content is 10~70wt%.
In a preferred embodiment of the invention, in the step (3), the nano silica fume of surface coated polymer and
The mass ratio of graphite is 1: 2~19.
In a preferred embodiment of the invention, in the step (5), the volume ratio of carbon-source gas and argon gas is 1:
2~9.
Another technical solution of the present invention is as follows：
The application of Si-C composite material prepared by above-mentioned preparation method in preparing lithium ion battery.
The yet another aspect of the present invention is as follows：
A kind of lithium ion battery, cathode contain Si-C composite material prepared by above-mentioned preparation method.
The beneficial effects of the invention are as follows：
1, the present invention by after nano silica fume surfactant and polymer treatment again with graphite by high-energy ball milling into
Row is compound；Using simple technique nano silica fume is evenly distributed in graphite；Equally distributed silica flour can give full play to
The advantage of its nano-scale alleviates the capacity attenuation caused by huge volume change in charge and discharge process.
2, the multilayer hierarchical structure of preparation method of the invention construction by coated with carbon bed nano silica fume and graphite guide
Electric skeleton composition possesses the structure that the Si-C composite material of this space construction has smaller specific surface area and stablizes, ensure that
Electrode higher coulombic efficiency and excellent electrochemical cycle stability in charge and discharge process.
3, raw material derives from a wealth of sources, equipment is simple in the technique that uses of the present invention, it is of low cost, environmental-friendly, reproducible,
Suitable large-scale production.
Description of the drawings
Fig. 1 is the electron microscope of Si-C composite material prepared by the embodiment of the present invention 1.
Fig. 2 is the electrochemistry cycle performance figure for the lithium ion battery that the method for the present invention embodiment 1 makes.
Specific implementation mode
Technical scheme of the present invention is further detailed and is described below by way of specific implementation mode combination attached drawing.
Embodiment 1
The synthesis of Si-C composite material：The sodium lignin sulfonate of 0.3g nano silica fumes and 1.5mg is taken to put into the anhydrous of 50ml
In ethyl alcohol, in supersonic frequency 60kHz, ultrasonic power 20W L-1Under carry out supersound process 15min, obtain suspending liquid A 1；Take 0.54g
Phenolic resin is dissolved in the absolute ethyl alcohol of 50ml, and ultrasound 5min, obtains solution B 1 under same ultrasound condition；By 1 He of suspending liquid A
Solution B 1 mixes ultrasound 60min under same ultrasound condition, obtains suspension C1, suspension is rotated, and obtains surface packet
Cover the nano silica fume composite material of phenolic resin；Take the surfaces 0.1g cladding phenolic resin nano silica fume and 0.8g graphite in oxidation
In zirconium ball grinder, ratio of grinding media to material 3：1, in 1725r min-1Rotating speed under high-energy ball milling 1h, obtain surface cladding phenolic resin
The composite material of nano silica fume and graphite；The composite material of nano silica fume and graphite that surface coats phenolic resin is placed in porcelain boat
It is put into horizontal pipe furnace, tube furnace is with 5 DEG C of min-1Heating rate 900 DEG C are warming up in argon atmosphere, at this temperature
2h, cooled to room temperature is kept to obtain silicon-carbon composite precursor material；Silicon-carbon composite precursor material is placed in porcelain boat to be put into
In horizontal pipe furnace, tube furnace is with 10 DEG C of min-1Heating rate 600 DEG C are warming up in argon atmosphere, until at 600 DEG C, be passed through
Acetylene gas, acetylene throughput are 15mL min-1, the volume ratio of argon gas and acetylene is 9: 1, is continuously heating to 700 DEG C, warm herein
Degree is lower to maintain 2h, closes acetylene gas, the cooled to room temperature in argon atmosphere obtains silicon-carbon composite wood as shown in Figure 1
Material.
The preparation of electrode：By the Si-C composite material of gained and conductive agent (SuperP) and binder (sodium alginate,
It 2.5wt%) is mixed with mass ratio 80: 10: 10, a small amount of deionized water is added and is tuned into slurry, slurry is uniformly coated in copper
On foil, dry 12h, is made battery pole piece needed for experiment in 60 DEG C of vacuum drying oven.
Test the making of battery：Using battery pole piece obtained as working electrode, lithium piece is used as to electrode, with 1mol L- 1LiPF6EC/DMC/EMC (by volume be 1: 1: 1 mixing) solution and 10wt%FEC additives as electrolyte, diaphragm is
Celgard 2400 assembles CR2016 type button cells in the glove box full of argon atmosphere.
In 500mA g-1Current density under carry out charge and discharge, electrochemistry cycle performance is as shown in Figure 2.With 50mA g-1
Current density to before battery two circle activate, first circle discharge capacity be 814.9mAh g-1, second, which encloses discharge capacity, is reduced to
626.0mAh g-1, decline clearly, be due to generating a large amount of SEI films in discharge process for the first time, leading to a large amount of irreversible appearances
Amount loss.Since third circle, with 500mA g-1Current density charge and discharge are carried out to battery, the discharge capacity of third circle is
563.8mAh g-1, in 500mA g-1Current density under cycle 100 circle after, discharge capacity stills remain in 513.8mAh g-1,
It is the 91.1% of third circle capacity.
Embodiment 2
The synthesis of Si-C composite material：Take the NMP of the sodium lignin sulfonate of 0.7g nano silica fumes and 3.5mg input 100ml
In, in supersonic frequency 60kHz, ultrasonic power 20W L-1Under carry out supersound process 15min, obtain suspending liquid A 2；Take 0.2g polyphenyl
Amine is dissolved in the NMP of 50ml, and ultrasound 10min, obtains solution B 2 under same ultrasound condition；By suspending liquid A 2 and solution B 2 same
Ultrasound 60min is mixed under equal ultrasound conditions, suspension C2 is obtained, suspension is rotated, solvent evaporated obtains surface cladding
The nano silica fume composite material of polyaniline；Take the surfaces 0.13g cladding polyaniline nano silica fume and 0.8g graphite in zirconia ball
In ink tank, ratio of grinding media to material 3: 1, in 1725r min-1Rotating speed under high-energy ball milling 1h, obtain surface cladding polyaniline nano-silicon
The composite material of powder and graphite；The composite material of nano silica fume and graphite that surface coats polyaniline is placed in porcelain boat and is put into level
In tube furnace, tube furnace is with 5 DEG C of min-1Heating rate 600 DEG C are warming up in argon atmosphere, keep 2h at this temperature, so
After be passed through acetylene gas, acetylene throughput is 15mL min-1, the volume ratio of argon gas and acetylene is 9: 1, with 10 DEG C of min-1Liter
Warm rate is continuously heating to 700 DEG C, maintains 2h at this temperature, closes acetylene gas, room is naturally cooled in argon atmosphere
Temperature obtains Si-C composite material.
The preparation of electrode and the making of test battery and embodiment 1 are identical.
With 50mA g-1Current density to before battery two circle activate, first circle discharge capacity be 825.4mAh g-1, the
Two circle discharge capacities are reduced to 627.3mAh g-1.Since third circle, with 500mA g-1Current density to battery carry out charge and discharge
The discharge capacity of electricity, third circle is 554.8mAh g-1, in 500mA g-1Current density under cycle 100 circle after, discharge capacity
Still remain in 521.5mAh g-1, it is the 94.0% of third circle capacity.
Embodiment 3
The synthesis of Si-C composite material：Take the nothing of the neopelex of 0.4g nano silica fumes and 2mg input 70ml
In water-ethanol, in supersonic frequency 60kHz, ultrasonic power 20W L-1Under carry out supersound process 15min, obtain suspending liquid A 3；It takes
0.54g phenolic resin is dissolved in the absolute ethyl alcohol of 50ml, and ultrasound 10min, obtains solution B 3 under same ultrasound condition；It will suspend
Liquid A3 and solution B 3 mix ultrasound 60min under same ultrasound condition, obtain suspension C3, suspension is rotated, and obtain
Surface coats the nano silica fume composite material of phenolic resin；Take the nano silica fume and 0.4g graphite of the surfaces 0.2g cladding phenolic resin
In zirconia ball grinding jar, ratio of grinding media to material 3: 1, in 1725r min-1Rotating speed under high-energy ball milling 3h, obtain surface cladding phenolic aldehyde
The nano silica fume of resin and the composite material of graphite；The composite material of nano silica fume and graphite that surface coats phenolic resin is set
It is put into horizontal pipe furnace in porcelain boat, tube furnace is with 5 DEG C of min-1Heating rate 900 DEG C are warming up in argon atmosphere, herein
At a temperature of keep 2h, cooled to room temperature to obtain silicon-carbon composite precursor material；Silicon-carbon composite precursor material is placed in porcelain
Boat is put into horizontal pipe furnace, and tube furnace is with 10 DEG C of min-1Heating rate 600 DEG C are warming up in argon atmosphere, until 600 DEG C
When, it is passed through acetylene gas, acetylene throughput is 15mLmin-1, the volume ratio of argon gas and acetylene is 9：1,700 DEG C are continuously heating to,
2h is maintained at this temperature, closes acetylene gas, and the cooled to room temperature in argon atmosphere obtains Si-C composite material.
The preparation of electrode and the making of test battery and embodiment 1 are identical.
In 50mA g-1Current density under carry out charge and discharge, first circle discharge capacity is 1055.3mAh g-1, first circle charging
Capacity is 848.7mAh g-1。
Those of ordinary skill in the art remain able to it is found that when technical scheme of the present invention changes in following ranges
To same as the previously described embodiments or similar technique effect, protection scope of the present invention is still fallen within：
A kind of preparation method of Si-C composite material, includes the following steps：
(1) after mixing nano silica fume, surfactant and organic solvent, in 55~65kHz of supersonic frequency, ultrasonic power
10~200W L-1Under carry out 1~30min of supersound process, obtain suspension；
(2) above-mentioned suspension is mixed with polybenzazole precursor liquid solution, in 55~65kHz of supersonic frequency, ultrasonic power 10
~200WL-1Under carry out 5~120min of supersound process after, solvent evaporated obtains the nano silica fume of surface coated polymer；It is above-mentioned
Polymer includes at least one of phenolic resin, polyaniline, polypyrrole and polyvinylidene fluoride；
(3) high-energy ball milling, ball are carried out after mixing the nano silica fume of the surface coated polymer obtained by step (2) and graphite
Expect ratio 3: 1~15: 1, rotating speed 600rmin-1~2000rmin-1, 1~9h of time；
(4) material obtained by step (3) is subjected to high temperature cabonization in 600~1000 DEG C and handles 1~10h；
(5) material obtained by step (4) is subjected to chemical vapor deposition, obtains the Si-C composite material, the chemistry gas
Mutually the air source of deposition is made of carbon-source gas and argon gas, and the throughput of carbon-source gas is 5~100mL min-1, chemical vapor deposition
Temperature be 600~1000 DEG C, the time be 0.1~6h, above-mentioned carbon-source gas be CH4、C2H2And C3H8At least one of.
The grain size of the nano silica fume is 10~100nm.The surfactant is sodium lignin sulfonate, detergent alkylate
At least one of sodium sulfonate, lauryl sodium sulfate and polyvinylpyrrolidone.The nano-silicon of the surface coated polymer
The content of polymer in powder is 10~70wt%.In the step (3), the nano silica fume of surface coated polymer and graphite
Mass ratio is 1: 2~19.In the step (5), the volume ratio of carbon-source gas and argon gas is 1: 2~9.
The foregoing is only a preferred embodiment of the present invention, therefore cannot limit the scope of implementation of the present invention according to this, i.e.,
According to equivalent changes and modifications made by the scope of the claims of the present invention and description, all should still belong in the range of the present invention covers.
Claims (9)
1. a kind of preparation method of Si-C composite material, it is characterised in that：Include the following steps：
(1) after nano silica fume, surfactant and organic solvent being mixed, in 55~65kHz of supersonic frequency, ultrasonic power 10~
200W L-1Under carry out 1~30min of supersound process, obtain suspension；
(2) above-mentioned suspension is mixed with polybenzazole precursor liquid solution, in 55~65kHz of supersonic frequency, ultrasonic power 10~
200W L-1Under carry out 5~120min of supersound process after, solvent evaporated obtains the nano silica fume of surface coated polymer；It is above-mentioned poly-
It includes at least one of phenolic resin, polyaniline, polypyrrole and polyvinylidene fluoride to close object；
(3) high-energy ball milling, ratio of grinding media to material are carried out after mixing the nano silica fume of the surface coated polymer obtained by step (2) and graphite
3: 1~15: 1, rotating speed 600rmin-1~2000rmin-1, 1~9h of time；
(4) material obtained by step (3) is subjected to high temperature cabonization in 600~1000 DEG C and handles 1~10h；
(5) material obtained by step (4) is subjected to chemical vapor deposition, obtains the Si-C composite material, the chemical vapor deposition
Long-pending air source is made of carbon-source gas and argon gas, and the throughput of carbon-source gas is 5~100mL min-1, the temperature of chemical vapor deposition
Degree is 600~1000 DEG C, and the time is 0.1~6h, and above-mentioned carbon-source gas is CH4、C2H2And C3H8At least one of.
2. preparation method as described in claim 1, it is characterised in that：The grain size of the nano silica fume is 10~100nm.
3. preparation method as described in claim 1, it is characterised in that：The surfactant is sodium lignin sulfonate, 12
At least one of sodium alkyl benzene sulfonate, lauryl sodium sulfate and polyvinylpyrrolidone.
4. preparation method as described in claim 1, it is characterised in that：The organic solvent includes absolute ethyl alcohol and NMP.
5. preparation method as described in claim 1, it is characterised in that：It is poly- in the nano silica fume of the surface coated polymer
The content for closing object is 10~70wt%.
6. preparation method as described in claim 1, it is characterised in that：In the step (3), the nanometer of surface coated polymer
The mass ratio of silica flour and graphite is 1: 2~19.
7. preparation method as described in claim 1, it is characterised in that：In the step (5), the volume of carbon-source gas and argon gas
Than being 1: 2~9.
8. Si-C composite material prepared by the preparation method in claim 1 to 7 described in any claim is preparing lithium ion
Application in battery.
9. a kind of lithium ion battery, it is characterised in that：Its cathode contains the system described in any claim in claim 1 to 7
Si-C composite material prepared by Preparation Method.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109742355A (en) * | 2018-12-29 | 2019-05-10 | 广西卡耐新能源有限公司 | A kind of preparation of silicon carbon composite materials method |
| CN109786706A (en) * | 2019-01-17 | 2019-05-21 | 新奥石墨烯技术有限公司 | Negative electrode material and preparation method thereof, cathode and battery |
| CN110085850A (en) * | 2019-05-20 | 2019-08-02 | 深圳市斯诺实业发展有限公司 | A kind of preparation method of the carbon-coated Si-C composite material of multilayer |
| CN110931744A (en) * | 2019-11-29 | 2020-03-27 | 深圳技术大学 | Silicon-carbon negative electrode material and preparation method thereof |
| CN111086990A (en) * | 2019-12-31 | 2020-05-01 | 江苏津谊新能源科技有限公司 | Preparation method of silicon-carbon microspheres |
| CN111106333A (en) * | 2019-12-12 | 2020-05-05 | 新奥石墨烯技术有限公司 | Silicon-carbon negative electrode material and preparation method and application thereof |
| CN111900347A (en) * | 2020-07-14 | 2020-11-06 | 中国科学院山西煤炭化学研究所 | Method for preparing silicon-carbon composite material based on ball milling method in air atmosphere and application thereof |
| CN115867511A (en) * | 2020-07-03 | 2023-03-28 | 斯道拉恩索公司 | Method for producing carbon-silicon composite material powder and carbon-silicon composite material powder |
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