CN108899529B - Preparation method of silicon-based composite material - Google Patents
Preparation method of silicon-based composite material Download PDFInfo
- Publication number
- CN108899529B CN108899529B CN201810787546.4A CN201810787546A CN108899529B CN 108899529 B CN108899529 B CN 108899529B CN 201810787546 A CN201810787546 A CN 201810787546A CN 108899529 B CN108899529 B CN 108899529B
- Authority
- CN
- China
- Prior art keywords
- silicon
- composite material
- based composite
- drying
- temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
-
- 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
-
- 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
-
- 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
- H01M4/628—Inhibitors, e.g. gassing inhibitors, corrosion inhibitors
-
- 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
- H01M2004/026—Electrodes composed of, or comprising, active material characterised by the polarity
- H01M2004/027—Negative electrodes
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Silicon Compounds (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The invention belongs to the technical field of silicon-based materials, and particularly relates to a preparation method of a silicon-based composite material, which comprises the following steps: step 1, adding a nano silicon material into absolute ethyl alcohol, then adding a silane coupling agent, and uniformly stirring to form a silicon dispersion liquid; step 2, adding activated carbon into the aqueous solution of sodium polyacrylate, performing ultrasonic treatment for 10-20min, taking out, and slightly drying the activated carbon coated particles through heating; step 3, adding the activated carbon coated particles into the silicon dispersion liquid, and then quickly taking out and drying to obtain silicon-based coated particles; step 4, spraying phenolic resin liquid on the surfaces of the silicon-based covering particles, and drying to obtain multilayer covering particles; and 5, adding the multilayer coated particles into a reaction kettle for reduction reaction for 2-5h, then carrying out nitrogen carbonization reaction for 3-8h, cooling, and standing for 20-40min at constant pressure and constant temperature to obtain the silicon-based composite material. The invention solves the problem of silicon volume expansion, forms compact solidification on silicon materials, can effectively inhibit the silicon expansion and has the characteristic of good cycle stability.
Description
Technical Field
The invention belongs to the technical field of silicon-based materials, and particularly relates to a preparation method of a silicon-based composite material.
Background
The lithium ion battery has the advantages of high energy density, long service life, no environmental pollution and the like, and is widely used in the 3C field. In recent years, the development of the automobile power system has been widely realized. With the rapid development of the new energy automobile market, the energy density requirement of the battery is higher and higher, the traditional graphite cathode is close to the theoretical value and is difficult to further improve, and new anode and cathode materials are urgently needed to be developed to meet the development of the new energy automobile market.
The theoretical specific capacity of the silicon-based material is 4200mAh/g, and the silicon-based material is one of the materials with the highest specific capacity. The silicon source is rich, the silicon element content in the earth crust is high, the earth crust is environment-friendly, the voltage platform of the silicon in the lithium intercalation and lithium deintercalation reaction is low, lithium cannot be separated out on the surface, and the safety is good. But silicon has also significant disadvantages, silicon being a semiconductor material, with low electrical conductivity; in addition, the volume expansion change is huge in the silicon circulation process, pulverization is easy to happen, active substances and a current collector lose electric contact, and even further fall off from the current collector, so that the circulation performance is seriously attenuated finally. In addition, the swelling causes the formed SEI film to be broken, exposes a new interface, and continues to form a new SEI film, resulting in an increasingly thick SEI film on the outer layer of the silicon particles after cycling, and eventually blocking the intercalation of lithium ions.
To solve the problem of silicon volume expansion, one skilled in the art modifies silicon by various methods, including nanocrystallization, alloying, porosification of silicon, and dispersion of silicon in various network systems, among others. These methods can improve the silicon cycle performance to some extent, but still have many problems, such as poor long cycle performance and excessive expansion.
CN102306757B discloses a preparation method of a silicon graphene composite negative electrode material for a lithium ion battery, which is composed of 10-99% of silicon powder, 1-90% of graphene and 0-40% of amorphous carbon, and the preparation method of the silicon graphene composite negative electrode material for the lithium ion battery comprises the following steps: firstly, the first step is carried out: uniformly dispersing silicon powder and graphene oxide in a solvent, uniformly dispersing, then carrying out spray drying, wherein the inlet temperature is 120-140 ℃, the outlet temperature is 80-140 ℃, removing the solvent, then placing the solvent in a high-temperature furnace, introducing a protective body, heating to 500-1100 ℃, carrying out high-temperature annealing, keeping the temperature for 1-24 hours, reducing the graphene oxide, cooling to room temperature, and then carrying out a second step: placing the prepared substance in a high-temperature furnace, heating to 600-1100 ℃ in protective gas, then loading the protective gas into a gaseous carbon source or a liquid carbon source, and preserving the heat for 1-12h to obtain the silicon-graphene composite cathode material of the lithium ion battery; the second step can also be operated as follows: and (3) uniformly dispersing the substance obtained in the first step and a solid carbon source in a solvent through ultrasonic treatment and stirring, evaporating the solvent to dryness, transferring the solvent to a high-temperature furnace, heating to 600-1100 ℃ in protective gas, and preserving the heat for 1-12 hours to obtain the silicon-graphene composite cathode material of the lithium ion battery. The composite negative electrode material prepared by the method has excellent cycle performance, and a battery assembled by the lithium ion battery silicon graphene composite negative electrode material with a metal lithium sheet as a counter electrode shows the first reversible capacity of 562-1525mAh/g, and the first coulombic efficiency is 42-70%. However, the first coulombic efficiency is low and is below 70%, and the preparation method is complicated, so that the industrial production is not adopted, and the practical application of the coulombic is seriously influenced.
Therefore, how to more effectively relieve the volume expansion of silicon, ensure the cycling stability of the silicon cathode and obtain the silicon cathode material with high specific capacity and long cycle life is a technical hotspot to be solved urgently in the field of the current lithium batteries.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a preparation method of a silicon-based composite material, which solves the problem of silicon volume expansion, forms compact solidification on a silicon material, can effectively inhibit the silicon expansion and has the characteristic of good cycle stability.
In order to achieve the technical purpose, the technical scheme of the invention is as follows:
a preparation method of a silicon-based composite material comprises the following steps:
step 1, adding a nano silicon material into absolute ethyl alcohol, then adding a silane coupling agent, and uniformly stirring to form a silicon dispersion liquid;
step 2, adding activated carbon into the sodium polyacrylate aqueous solution, performing ultrasonic treatment for 10-20min, taking out, and slightly drying activated carbon coated particles through heating;
step 3, adding the activated carbon coated particles into the silicon dispersion liquid, and then quickly taking out and drying to obtain silicon-based coated particles;
step 4, spraying phenolic resin liquid on the surfaces of the silicon-based covering particles, and drying to obtain multilayer covering particles;
and 5, adding the multilayer coated particles into a reaction kettle for reduction reaction for 2-5h, then carrying out nitrogen carbonization reaction for 3-8h, cooling, and standing for 20-40min at constant pressure and constant temperature to obtain the silicon-based composite material.
The concentration of the nano silicon material in the step 1 in the absolute ethyl alcohol is 30-60g/L, the adding amount of the silane coupling agent is 50-70% of the mass of the nano silicon material, and the stirring speed for uniformly stirring is 700 r/min.
The adding amount of the activated carbon in the step 2 is 70-100% of the mass of the nano silicon material, the concentration of the sodium polyacrylate water solution is 0.03-0.06mol/L, and the ultrasonic frequency of the ultrasonic is 30-50 kHz.
The temperature of the micro-heating drying in the step 2 is 100-110 ℃.
The drying temperature in the step 3 is 80-90 ℃.
The spraying amount of the phenolic resin liquid on the surface of the particles in the step 4 is 0.02-0.04 mg-cm2The drying temperature is 80-100 ℃.
The reduction reaction in the step 5 adopts a hydrogen atmosphere, and the temperature is 300-500 ℃.
The temperature of the nitrogen carbonization reaction in the step 5 is 700-800 ℃.
The pressure of the constant-temperature constant-pressure standing in the step 5 is 0.04-0.06Mpa, and the temperature is 150-200 ℃.
Step 1, adding a nano silicon material and a silane coupling agent into absolute ethyl alcohol, and uniformly stirring to form a good silicon dispersion system.
Step 2, adding activated carbon into the sodium polyacrylate aqueous solution to form a turbid liquid system, adsorbing sodium polyacrylate into a porous structure by utilizing the porosity and adsorbability of the activated carbon to form a good gap filling effect, and then drying under a micro-heating condition.
And 3, soaking the activated carbon coated particles in the silicon dispersion liquid, taking out the particles, forming a silicon-based film on the surface of the particles, and drying the particles to form a uniform surface silicon material layer.
And 4, uniformly coating the surface with phenolic resin, and forming an ultrathin resin layer to form a multilayer structure.
Step 5, carrying out reduction reaction on the multilayer coated particles in a reaction kettle to convert a silane coupling agent into a silicon material, filling up nano silicon gaps with the silane coupling agent, converting the filled nano silicon gaps into the silicon material to form a finished silicon layer structure, heating water in the sodium polyacrylate to lose in the reaction process to form a compact structure, enabling the silicon layer to be in surface contact with the activated carbon, and enabling the outer surface of the silicon layer to be in close contact with the phenolic resin; and performing carbonization reaction under the condition of nitrogen to form a carbon layer with a stable structure inside and outside the silicon layer, thereby having a good fixing effect on the position and the structure of the nano silicon material.
From the above description, it can be seen that the present invention has the following advantages:
1. the invention solves the problem of silicon volume expansion, forms compact solidification on silicon materials, can effectively inhibit the silicon expansion and has the characteristic of good cycle stability.
2. The invention adopts the silane coupling agent as the connecting agent between the nano silicon materials, not only forms a good stable structure, but also forms the silicon materials through reduction reaction in the later period.
3. According to the invention, a good interlayer structure is formed on the inner surface and the outer surface of the silicon layer, so that the compounding property of silicon and carbon can be greatly improved, the stability and the cyclicity of the silicon and carbon are effectively improved, and meanwhile, good high specific heat is reflected.
Detailed Description
The present invention is described in detail with reference to examples, but the present invention is not limited to the claims.
Example 1
A preparation method of a silicon-based composite material comprises the following steps:
step 1, adding a nano silicon material into absolute ethyl alcohol, then adding a silane coupling agent, and uniformly stirring to form a silicon dispersion liquid;
step 2, adding activated carbon into the sodium polyacrylate aqueous solution, performing ultrasonic treatment for 10min, taking out, and slightly drying activated carbon coated particles through heating;
step 3, adding the activated carbon coated particles into the silicon dispersion liquid, and then quickly taking out and drying to obtain silicon-based coated particles;
step 4, spraying phenolic resin liquid on the surfaces of the silicon-based covering particles, and drying to obtain multilayer covering particles;
and 5, adding the multilayer coated particles into a reaction kettle for reduction reaction for 2 hours, then carrying out nitrogen carbonization reaction for 3 hours, cooling, and standing at constant pressure and constant temperature for 20min to obtain the silicon-based composite material.
The concentration of the nano silicon material in the step 1 in absolute ethyl alcohol is 30g/L, the adding amount of the silane coupling agent is 50% of the mass of the nano silicon material, and the stirring speed for uniformly stirring is 500 r/min.
The adding amount of the activated carbon in the step 2 is 70% of the mass of the nano silicon material, the concentration of the sodium polyacrylate water solution is 0.03mol/L, and the ultrasonic frequency of the ultrasonic is 30 kHz.
The temperature of the micro-heating drying in the step 2 is 100 ℃.
The drying temperature in the step 3 is 80 ℃.
The spraying amount of the phenolic resin liquid in the step 4 on the particle surface is 0.02mg/cm2The drying temperature is 80 ℃.
The reduction reaction in the step 5 adopts a hydrogen atmosphere, and the temperature is 300 ℃.
The temperature of the nitrogen carbonization reaction in the step 5 is 700 ℃.
And 5, standing at constant temperature and constant pressure under the pressure of 0.04Mpa at the temperature of 150 ℃.
Example 2
A preparation method of a silicon-based composite material comprises the following steps:
step 1, adding a nano silicon material into absolute ethyl alcohol, then adding a silane coupling agent, and uniformly stirring to form a silicon dispersion liquid;
step 2, adding activated carbon into the sodium polyacrylate aqueous solution, performing ultrasonic treatment for 20min, taking out, and slightly drying activated carbon coated particles through heating;
step 3, adding the activated carbon coated particles into the silicon dispersion liquid, and then quickly taking out and drying to obtain silicon-based coated particles;
step 4, spraying phenolic resin liquid on the surfaces of the silicon-based covering particles, and drying to obtain multilayer covering particles;
and 5, adding the multilayer coated particles into a reaction kettle for reduction reaction for 5 hours, then carrying out nitrogen carbonization reaction for 8 hours, cooling, and standing at constant pressure and constant temperature for 40min to obtain the silicon-based composite material.
The concentration of the nano silicon material in the step 1 in absolute ethyl alcohol is 60g/L, the adding amount of the silane coupling agent is 70% of the mass of the nano silicon material, and the stirring speed for uniformly stirring is 700 r/min.
The adding amount of the activated carbon in the step 2 is 100% of the mass of the nano silicon material, the concentration of the sodium polyacrylate water solution is 0.06mol/L, and the ultrasonic frequency of the ultrasonic is 50 kHz.
The temperature of the micro-heating drying in the step 2 is 110 ℃.
The drying temperature in the step 3 is 90 ℃.
The spraying amount of the phenolic resin liquid in the step 4 on the particle surface is 0.04mg/cm2The drying temperature is 100 ℃.
The reduction reaction in the step 5 adopts a hydrogen atmosphere, and the temperature is 500 ℃.
The temperature of the nitrogen carbonization reaction in the step 5 is 800 ℃.
And 5, standing at constant temperature and constant pressure under the pressure of 0.06Mpa at the temperature of 200 ℃.
Example 3
A preparation method of a silicon-based composite material comprises the following steps:
step 1, adding a nano silicon material into absolute ethyl alcohol, then adding a silane coupling agent, and uniformly stirring to form a silicon dispersion liquid;
step 2, adding activated carbon into the sodium polyacrylate aqueous solution, performing ultrasonic treatment for 15min, taking out, and slightly drying activated carbon coated particles through heating;
step 3, adding the activated carbon coated particles into the silicon dispersion liquid, and then quickly taking out and drying to obtain silicon-based coated particles;
step 4, spraying phenolic resin liquid on the surfaces of the silicon-based covering particles, and drying to obtain multilayer covering particles;
and 5, adding the multilayer coated particles into a reaction kettle for reduction reaction for 4 hours, then carrying out nitrogen carbonization reaction for 6 hours, cooling, and standing for 30min at constant pressure and constant temperature to obtain the silicon-based composite material.
The concentration of the nano silicon material in the step 1 in absolute ethyl alcohol is 50g/L, the adding amount of the silane coupling agent is 60% of the mass of the nano silicon material, and the stirring speed for uniformly stirring is 600 r/min.
The adding amount of the activated carbon in the step 2 is 90% of the mass of the nano silicon material, the concentration of the sodium polyacrylate water solution is 0.05mol/L, and the ultrasonic frequency of the ultrasonic is 40 kHz.
The temperature of the micro-heating drying in the step 2 is 105 ℃.
The drying temperature in the step 3 is 85 ℃.
The spraying amount of the phenolic resin liquid in the step 4 on the particle surface is 0.03mg/cm2The drying temperature is 90 ℃.
The reduction reaction in the step 5 adopts a hydrogen atmosphere, and the temperature is 400 ℃.
The temperature of the nitrogen carbonization reaction in the step 5 is 750 ℃.
And 5, standing at constant temperature and constant pressure under the pressure of 0.05Mpa at the temperature of 180 ℃.
Performance detection
In summary, the invention has the following advantages:
1. the invention solves the problem of silicon volume expansion, forms compact solidification on silicon materials, can effectively inhibit the silicon expansion and has the characteristic of good cycle stability.
2. The invention adopts the silane coupling agent as the connecting agent between the nano silicon materials, not only forms a good stable structure, but also forms the silicon materials through reduction reaction in the later period.
3. According to the invention, a good interlayer structure is formed on the inner surface and the outer surface of the silicon layer, so that the compounding property of silicon and carbon can be greatly improved, the stability and the cyclicity of the silicon and carbon are effectively improved, and meanwhile, good high specific heat is reflected.
It should be understood that the detailed description of the invention is merely illustrative of the invention and is not intended to limit the invention to the specific embodiments described. It will be appreciated by those skilled in the art that the present invention may be modified or substituted equally as well to achieve the same technical result; as long as the use requirements are met, the method is within the protection scope of the invention.
Claims (9)
1. A preparation method of a silicon-based composite material is characterized by comprising the following steps: the method comprises the following steps:
step 1, adding a nano silicon material into absolute ethyl alcohol, then adding a silane coupling agent, and uniformly stirring to form a silicon dispersion liquid;
step 2, adding activated carbon into the sodium polyacrylate aqueous solution, performing ultrasonic treatment for 10-20min, taking out, and slightly drying activated carbon coated particles through heating;
step 3, adding the activated carbon coated particles into the silicon dispersion liquid, and then quickly taking out and drying to obtain silicon-based coated particles;
step 4, spraying phenolic resin liquid on the surfaces of the silicon-based covering particles, and drying to obtain multilayer covering particles;
and 5, adding the multilayer coated particles into a reaction kettle for reduction reaction for 2-5h, then carrying out nitrogen carbonization reaction for 3-8h, cooling, and standing for 20-40min at constant pressure and constant temperature to obtain the silicon-based composite material.
2. The method for preparing a silicon-based composite material according to claim 1, wherein: the concentration of the nano silicon material in the step 1 in the absolute ethyl alcohol is 30-60g/L, the adding amount of the silane coupling agent is 50-70% of the mass of the nano silicon material, and the stirring speed for uniformly stirring is 700 r/min.
3. The method for preparing a silicon-based composite material according to claim 1, wherein: the adding amount of the activated carbon in the step 2 is 70-100% of the mass of the nano silicon material, the concentration of the sodium polyacrylate water solution is 0.03-0.06mol/L, and the ultrasonic frequency of the ultrasonic is 30-50 kHz.
4. The method for preparing a silicon-based composite material according to claim 1, wherein: the temperature of the micro-heating drying in the step 2 is 100-110 ℃.
5. The method for preparing a silicon-based composite material according to claim 1, wherein: the drying temperature in the step 3 is 80-90 ℃.
6. The method of claim 1, wherein the silica-based composite material is prepared by a method comprising: the spraying amount of the phenolic resin liquid in the step 4 on the particle surface is 0.02-0.04mg/cm2The drying temperature is 80-100 ℃.
7. The method for preparing a silicon-based composite material according to claim 1, wherein: the reduction reaction in the step 5 adopts a hydrogen atmosphere, and the temperature is 300-500 ℃.
8. The method for preparing a silicon-based composite material according to claim 1, wherein: the temperature of the nitrogen carbonization reaction in the step 5 is 700-800 ℃.
9. The method for preparing a silicon-based composite material according to claim 1, wherein: the pressure of the constant-temperature constant-pressure standing in the step 5 is 0.04-0.06Mpa, and the temperature is 150-200 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810787546.4A CN108899529B (en) | 2018-07-18 | 2018-07-18 | Preparation method of silicon-based composite material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810787546.4A CN108899529B (en) | 2018-07-18 | 2018-07-18 | Preparation method of silicon-based composite material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108899529A CN108899529A (en) | 2018-11-27 |
| CN108899529B true CN108899529B (en) | 2021-05-18 |
Family
ID=64350934
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810787546.4A Active CN108899529B (en) | 2018-07-18 | 2018-07-18 | Preparation method of silicon-based composite material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108899529B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113745465B (en) * | 2021-08-31 | 2023-01-24 | 长沙矿冶研究院有限责任公司 | Preparation method of silicon-carbon composite material |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103427069A (en) * | 2012-05-19 | 2013-12-04 | 湖南省正源储能材料与器件研究所 | Lithium ion battery composite anode material and preparation thereof |
| CN104011918A (en) * | 2011-10-26 | 2014-08-27 | 耐克森有限公司 | Electrode composition for secondary battery cell |
| CN105789556A (en) * | 2016-04-26 | 2016-07-20 | 中国科学院长春应用化学研究所 | Electrode plate and lithium ion battery |
| CN106025222A (en) * | 2016-06-24 | 2016-10-12 | 广东省稀有金属研究所 | Preparation method for coated silicon/carbon/graphite composite negative electrode material |
| CN106229479A (en) * | 2016-08-18 | 2016-12-14 | 深圳市贝特瑞新能源材料股份有限公司 | A kind of lithium ion battery activated carbon composite negative pole material, preparation method and lithium ion battery |
| CN107069009A (en) * | 2017-04-24 | 2017-08-18 | 广东烛光新能源科技有限公司 | A kind of silicon-carbon cathode material and preparation method thereof |
| CN107785541A (en) * | 2016-08-29 | 2018-03-09 | 南京安普瑞斯有限公司 | A kind of Silicon-carbon composite material for lithium ion battery and preparation method thereof |
-
2018
- 2018-07-18 CN CN201810787546.4A patent/CN108899529B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104011918A (en) * | 2011-10-26 | 2014-08-27 | 耐克森有限公司 | Electrode composition for secondary battery cell |
| CN103427069A (en) * | 2012-05-19 | 2013-12-04 | 湖南省正源储能材料与器件研究所 | Lithium ion battery composite anode material and preparation thereof |
| CN105789556A (en) * | 2016-04-26 | 2016-07-20 | 中国科学院长春应用化学研究所 | Electrode plate and lithium ion battery |
| CN106025222A (en) * | 2016-06-24 | 2016-10-12 | 广东省稀有金属研究所 | Preparation method for coated silicon/carbon/graphite composite negative electrode material |
| CN106229479A (en) * | 2016-08-18 | 2016-12-14 | 深圳市贝特瑞新能源材料股份有限公司 | A kind of lithium ion battery activated carbon composite negative pole material, preparation method and lithium ion battery |
| CN107785541A (en) * | 2016-08-29 | 2018-03-09 | 南京安普瑞斯有限公司 | A kind of Silicon-carbon composite material for lithium ion battery and preparation method thereof |
| CN107069009A (en) * | 2017-04-24 | 2017-08-18 | 广东烛光新能源科技有限公司 | A kind of silicon-carbon cathode material and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108899529A (en) | 2018-11-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113078318B (en) | Three-dimensional porous silicon-carbon composite material, preparation method and application thereof | |
| CN105489855B (en) | High capacity type lithium ion battery nucleocapsid silicon-carbon composite cathode material and preparation method thereof | |
| CN105551815B (en) | A kind of lithium-ion capacitor and preparation method thereof | |
| CN106876689B (en) | Nitrogen-doped graphene-silicon composite negative electrode material, preparation method thereof and lithium ion battery | |
| CN107221654B (en) | Three-dimensional porous nest-shaped silicon-carbon composite negative electrode material and preparation method thereof | |
| CN110504435B (en) | Method for preparing silicon-carbon composite negative electrode material by low-temperature plasma | |
| CN109148847B (en) | Boron-doped modified hard carbon-coated negative electrode material with high rate performance and liquid-phase preparation method thereof | |
| CN105152161A (en) | Heteroatom doped surface perforated hollow sphere graphene material, preparation method and application thereof | |
| CN105489866B (en) | A kind of lithium ion battery and its anode material and preparation method | |
| CN104934603A (en) | Preparation method of graphene-dopedand carbon-coated modified graphite anode material | |
| CN103427073A (en) | Preparation method of mesoporous Si/C composite microsphere as lithium battery negative electrode material | |
| CN109309198B (en) | Preparation method of lithium ion battery cathode red phosphorus/graphene composite material | |
| CN111170306A (en) | Boron/nitrogen double-doped porous carbon nanosheet and lithium-sulfur battery positive electrode material thereof | |
| CN103456926A (en) | Preparation methods of silicon-graphene composite material and lithium ion battery | |
| CN103199225A (en) | Silicon carbon negative electrode material, preparation method of silicon carbon negative electrode material and lithium ion battery | |
| CN105161682B (en) | A kind of orientation carbon microtubule fasolculus lithium cell cathode material for loading carbon coated ferriferrous oxide nano-particle and preparation method thereof | |
| CN114122370A (en) | Negative electrode material for inducing silane deposition through porous carbon double bond modification and preparation method and application thereof | |
| CN102299334A (en) | Carbon coated LiFePO4 porous anode and preparation method thereof | |
| CN108987704A (en) | A kind of preparation method and applications of the silicon-carbon composite cathode material of lithium ion battery with porous structure | |
| CN114388738B (en) | Silicon-based anode material and preparation method and application thereof | |
| CN108899529B (en) | Preparation method of silicon-based composite material | |
| CN105047870A (en) | Nitrogen-doped carbon-coated silicon composite material and preparation method thereof | |
| CN103117388B (en) | Carbon coated ferriferrous oxide and preparation method thereof and the application in lithium ion battery | |
| CN112803018A (en) | Silicon-doped graphene composite material and preparation method and application thereof | |
| CN115425212A (en) | Method for preparing high-first-efficiency silicon monoxide through low-temperature reduction and application thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20211206 Address after: No.86 Lingbo Road, Gaoyou Economic Development Zone, Yangzhou City, Jiangsu Province Patentee after: YANGZHOU JINGYING PHOTOELECTRIC TECHNOLOGY Co.,Ltd. Address before: 312030 Qian Mei Village, Qian Qing town, Keqiao District, Shaoxing, Zhejiang Patentee before: Shaoxing Ziang New Materials Co.,Ltd. Effective date of registration: 20211206 Address after: 312030 Qian Mei Village, Qian Qing town, Keqiao District, Shaoxing, Zhejiang Patentee after: Shaoxing Ziang New Materials Co.,Ltd. Address before: 312000 No. 508 West Ring Road, Zhejiang, Shaoxing Patentee before: SHAOXING University |