CN108470891A - The method for preparing silicon-carbon cathode material based on micron silica - Google Patents
The method for preparing silicon-carbon cathode material based on micron silica Download PDFInfo
- Publication number
- CN108470891A CN108470891A CN201810219122.8A CN201810219122A CN108470891A CN 108470891 A CN108470891 A CN 108470891A CN 201810219122 A CN201810219122 A CN 201810219122A CN 108470891 A CN108470891 A CN 108470891A
- Authority
- CN
- China
- Prior art keywords
- sio
- cathode material
- material based
- carbon cathode
- preparing silicon
- 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.)
- Granted
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
- H01M4/624—Electric conductive fillers
- H01M4/625—Carbon or graphite
-
- 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
-
- 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
Based on the method that micron silica prepares silicon-carbon cathode material, step is:1) SiO is pressed2:Carbon source:Water=(30~80):(5~15):The mass ratio of (60~120), is made into slurries, 4~5h of wet grinding, and freeze-drying obtains nano level SiO2;2) by 1) gains high temperature cabonization, SiO is obtained2@C-materials, according still further to SiO2@C:Mg:NaCl mass ratioes 1:1:1~1:1:10 ratio, the magnesiothermic reduction at 600~750 DEG C, pickling later, washing, dry Si@C nano particles;3) by nano particle and graphene oxide solution ultrasound mixing 2), material is made in spray pyrolysis cladding reduction.The present invention is of low cost, easy to operate, is not easy to reunite, can maintain sample original appearance, product structure stability is good, and the electric conductivity and ion transport capability of material are strong.
Description
Technical field
The invention belongs to silicon-carbon cathode material preparation fields, and in particular to one kind preparing silicon-carbon based on micron silica and bears
The method of pole material.
Background technology
Silica-base material right and wrong have hitherto known highest reason often with potential high performance lithium ionic cell cathode material
By specific capacity (4200mAh/g) and lower intercalation potential (0.1Vvs.Li/Li+), and it is resourceful, it is environmental-friendly.But
Silicium cathode, with huge volume change (up to 300%), can cause silicon particle to be crushed, dusting, make electricity during removal lithium embedded
Pole material loses electroactive, shows as very poor cyclical stability;In addition, the conductivity of silicon itself is not high, multiplying power property is poor,
This has seriously affected application of the silicon materials as lithium ion battery negative material.Si-C composite material is made to alleviate the above problems
Effective way has obtained extensive research.Yu Xiaolei (preparation of lithium ion battery high performance silicon carbon compound cathode materials and property
Can study, Shanghai Communications University's Master's thesis, 2013) it is two different using nano silica fume and mesoporous silicon oxide (SBA-15)
Silicon source is prepared for spherical porous silicon/graphene@carbon (Si/GNS@C) composite material, but packet carbon method therein is chemistry
Vapour deposition process, this method are not easy industrial application;(magnesium reduction process prepares porous silicon-carbon composite cathode to the superfine people of Tao Hua
Material,《Silicate journal》08 phase in 2013) with mesoporous SiO2Silicon carbon material is prepared for the direct magnesiothermic reduction of silicon source, due to
Nanoscale SiO2Preparation rely on mostly biomass silicon source or ethyl orthosilicate (TEOS) hydrolysis be made, and formed particle hold
Easily reunite, causes manufacturing cost high, magnesium thermit effect is undesirable.
Invention content
For overcome the deficiencies in the prior art, the present invention provides prepare silicon-carbon cathode material based on micron silica
There is method at low cost, easy industrialized production, the small product size of preparation to expand advantage small, that electric conductivity is strong.
In order to achieve the above object, the technical solution that the present invention takes is:
Based on the method that micron silica prepares silicon-carbon cathode material, include the following steps:
Step 1:According to silica:Carbon source:Water=(30~80):(5~15):The mass ratio of (60~120), respectively
Silica, carbon source and the water for measuring 50~100um of grain size are configured to slurries, using sand mill 4~5h of wet grinding, then freeze
It is dried to obtain nano level SiO2;
Step 2:Step 1 gains are subjected to high temperature cabonization, obtain SiO2@C-materials, then according to SiO2@C:Mg:
NaCl mass ratioes are 1:1:1~1:1:10 ratio, magnesiothermic reduction under the conditions of 600~750 DEG C, pickling later, washing, drying
Si@C nano particles are made;
Step 3:After Si@C nanos particle made from step 2 and graphene oxide solution ultrasound mixing, pass through spraying
Pyrolysis technology carries out cladding reduction, and Si@C@G materials are made.
Further, the carbon source is one of glucose, phenolic resin, polyvinylpyrrolidone, polyacrylonitrile.
Further, the temperature of step 1 freeze-drying is -45 DEG C.
Further, the high temperature cabonization of step 2 carries out at 450~700 DEG C, and be carbonized 2~4h.
Further, the pickling described in step 2, washing process are:Impurity is removed using 2mol/L chlorohydric acid picklings, then is used
5% hydrofluoric acid wash 30min, removes unreacted SiO2, finally washed again to neutrality with deionized water, ethyl alcohol.
Further, the process of the cladding reduction described in step 3 is:Using spraying is ultrasonically formed, realizes and is granulated function,
Again by spherical particle obtained with H2/ Ar gaseous mixtures are carrier gas, are passed through 600~800 DEG C of vertical tubular furnace and carry out cladding reduction
Operation collects to obtain dry Si@C@G materials finally by electrostatic field.
Beneficial effects of the present invention:
The present invention utilizes micron order SiO2For raw material, material is prepared by wet grinding, it is of low cost, it is easy to operate, also
It can overcome and rely on biomass silicon source or ethyl orthosilicate TEOS hydrolysis nano level SiO obtained2It is easy to reunite, causes to prepare
Problem of high cost, later stage magnesium thermit effect is undesirable;And by Freeze Drying Technique, sample original appearance can be maintained, more
There is Commercial Prospect.
Organic polymer carbon source is chosen, the porous SiO of three-dimensional porous structure cladding can be obtained after carbonization2@C-materials, pass through
The amount for controlling fluxing agent NaCl, controls the generation of SiC, is conducive to the structural stability of the maintenance material in charge and discharge process, together
When, macromolecule carbon source contributes to buffer volumes to expand.
Using spray pyrolysis by Si@CIt is compound with graphene, carry out secondary cladding.During ullrasonic spraying, Ke Yiyou
The realization of effect is granulated function, obtains evengranular spherical particle;And graphene oxide is in carrier gas Ar/H2The reduction of gas
Under, graphene is generated, is coated on Si@C-materials surface, the electric conductivity and ion transport capability of reinforcing material preferably improve silicon
The disadvantage of sill electric conductivity difference, obtains the Si-C composite material of function admirable.
Description of the drawings
Fig. 1 is the grain size distribution after being sanded;
Fig. 2 is the X-ray diffractogram after magnesium heat under different NaCl additive amounts;
Fig. 3 is the grain size enlarged drawing after Si@C spray drying.
Specific implementation mode
With reference to specific embodiment, the present invention will be further described.
Embodiment 1
Weigh SiO230g, polyvinylpyrrolidone 5g and water 120mL are in sand mill, wet grinding 4h, after separation,
Be placed in refrigerator freezing, in cooling driers in -45 DEG C under the conditions of be freeze-dried two days two nights.
Product after cold do is placed in tube furnace, 4h is calcined under the conditions of 450 DEG C in inert atmosphere, obtains SiO2@C materials
Material, then according to SiO2@C:Mg:The mass ratio of NaCl is 1:1:1 ratio, magnesium heat is also in an inert atmosphere, under the conditions of 650 DEG C
Former 4h washs 8h in the hydrochloric acid solution of 2M, removes magnesium thermit by-product;Mass fraction, which is added, in solution after pickling is
0.5h is washed in 5% hydrofluoric acid solution, removes the SiO not reacted completely2, washed, filtered with deionized water and ethanol solution
It to neutrality, is placed in vacuum drying oven, 12h is dried in vacuo under the conditions of 80 DEG C, obtain Si@C composites.
According to mass ratio it is 10 by Si@C composites and graphene oxide:1 weighs, and is added in 20mL water, ultrasound
15min, be allowed to it is fully dispersed in aqueous solution.Using spray pyrolysis device, mixed liquor is sprayed in tube furnace, 800
DEG C H2/Under the reduction of Ar mixed carrier gas, restores and Si@C@G particles are made, be collected by electrostatic field.
Embodiment 2
Weigh SiO2With sand mill, wet grinding 4h is detached by 40g, polyvinylpyrrolidone 10g and water 120mL
Afterwards, be placed in refrigerator freezing, in cooling driers in -45 DEG C under the conditions of be freeze-dried two days two nights.
Product after cold do is placed in tube furnace, 4h is calcined under the conditions of 450 DEG C in inert atmosphere, obtains SiO2@C materials
Material, then according to SiO2@C:Mg:The mass ratio of NaCl is 1:1:1 ratio, magnesium heat is also in an inert atmosphere, under the conditions of 650 DEG C
Former 4h washs 8h in the hydrochloric acid solution of 2M, removes magnesium thermit by-product;Mass fraction, which is added, in solution after pickling is
0.5h is washed in 5% hydrofluoric acid solution, removes the SiO not reacted completely2, washed, filtered with deionized water and ethanol solution
It to neutrality, is placed in vacuum drying oven, 12h is dried in vacuo under the conditions of 80 DEG C, obtain Si@C composites.
According to mass ratio it is 10 by Si@C composites and graphene oxide:1 weighs, and is added in 20mL water, ultrasound
15min, be allowed to it is fully dispersed in aqueous solution.Using spray pyrolysis device, mixed liquor is sprayed in tube furnace, 800
DEG C H2Under the reduction of/Ar mixed carrier gas, restores and Si@C@G particles are made, be collected by electrostatic field.
Embodiment 3
Weigh SiO2In 60g, polyvinylpyrrolidone 5g and water 120mL and sand mill, wet grinding 4h, after separation,
Be placed in refrigerator freezing, in cooling driers in -45 DEG C under the conditions of be freeze-dried two days two nights.
Product after cold do is placed in tube furnace, 4h is calcined under the conditions of 500 DEG C in inert atmosphere, obtains SiO2@C materials
Material, then according to SiO2@C:Mg:The mass ratio of NaCl is 1:1:3 ratio, magnesium heat is also in an inert atmosphere, under the conditions of 650 DEG C
Former 4h washs 8h in the hydrochloric acid solution of 2M, removes magnesium thermit by-product;Mass fraction, which is added, in solution after pickling is
0.5h is washed in 5% hydrofluoric acid solution, removes the SiO not reacted completely2, washed, filtered with deionized water and ethanol solution
It to neutrality, is placed in vacuum drying oven, 12h is dried in vacuo under the conditions of 80 DEG C, obtain Si@C composites.
According to mass ratio it is 10 by Si@C composites and graphene oxide:1 weighs, and is added in 20mL water, ultrasound
15min, be allowed to it is fully dispersed in aqueous solution.Using spray pyrolysis device, mixed liquor is sprayed in tube furnace, 800
DEG C H2/Ar mixed carrier gas reduction under, restore and Si@C@G particles be made, be collected by electrostatic field.
Embodiment 4
Weigh SiO2In 80g, polyvinylpyrrolidone 5g and water 100mL and sand mill, wet grinding 5h, after separation,
Be placed in refrigerator freezing, in cooling driers in -45 DEG C under the conditions of be freeze-dried two days two nights.
Product after cold do is placed in tube furnace, 3h is calcined under the conditions of 500 DEG C in inert atmosphere, obtains SiO2@C materials
Material, then according to SiO2@C:Mg:The mass ratio of NaCl is 1:1:5 ratio, magnesium heat is also in an inert atmosphere, under the conditions of 700 DEG C
Former 4h washs 8h in the hydrochloric acid solution of 2M, removes magnesium thermit by-product;Mass fraction, which is added, in solution after pickling is
0.5h is washed in 5% hydrofluoric acid solution, removes the SiO not reacted completely2, washed, filtered with deionized water and ethanol solution
It to neutrality, is placed in vacuum drying oven, 12h is dried in vacuo under the conditions of 80 DEG C, obtain Si@C composites.
According to mass ratio it is 10 by Si@C composites and graphene oxide:1 weighs, and is added in 20mL water, ultrasound
15min, be allowed to it is fully dispersed in aqueous solution.Using spray pyrolysis device, mixed liquor is sprayed in tube furnace, 800
DEG C H2Under the reduction of/Ar mixed carrier gas, restores and Si@C@G particles are made, be collected by electrostatic field.
Embodiment 5
Weigh SiO2In 60g, polyvinylpyrrolidone 5g and water 100mL and sand mill, wet grinding 4h, after separation,
Be placed in refrigerator freezing, in cooling driers in -45 DEG C under the conditions of be freeze-dried two days two nights.
Product after cold do is placed in tube furnace, 4h is calcined under the conditions of 450 DEG C in inert atmosphere, obtains SiO2@C materials
Material, then according to SiO2@C:Mg:The mass ratio of NaCl is 1:1:10 ratio, in an inert atmosphere, magnesium heat under the conditions of 700 DEG C
4h is restored, 8h is washed in the hydrochloric acid solution of 2M, removes magnesium thermit by-product;Mass fraction, which is added, in solution after pickling is
0.5h is washed in 5% hydrofluoric acid solution, removes the SiO not reacted completely2, washed, filtered with deionized water and ethanol solution
It to neutrality, is placed in vacuum drying oven, 12h is dried in vacuo under the conditions of 80 DEG C, obtain Si@C composites.
According to mass ratio it is 10 by Si@C composites and graphene oxide:1 weighs, and is added in 20mL water, ultrasound
15min, be allowed to it is fully dispersed in aqueous solution.Using spray pyrolysis device, mixed liquor is sprayed in tube furnace, 700
DEG C H2/Ar mixed carrier gas reduction under, restore and Si@C@G particles be made, be collected by electrostatic field.
Fig. 1 is the grain size distribution after being sanded, and has chosen the particle after 5h is sanded in embodiment 4 and carries out grain size test, knot
Fruit shows that sand milling can make micron order SiO2Average particle size distribution in 200nm or so, there is preferable grinding effect.
Fig. 2 is the X-ray diffractogram after magnesium heat under different NaCl additive amounts, and the chart is bright, and the additive amount of NaCl can influence
The generation of SiC, the increase of NaCl dosages are conducive to the reduction of SiC.
Fig. 3 is the grain size enlarged drawing after Si@C spray drying, it can be seen that forms fluffy sphere material, thus has
Conducive to the volume expansion of alleviation material.
Claims (6)
1. the method for preparing silicon-carbon cathode material based on micron silica, which is characterized in that include the following steps:
Step 1:According to silica:Carbon source:Water=(30~80):(5~15):The mass ratio of (60~120), measures respectively
Silica, carbon source and the water of 50~100um of grain size is configured to slurries, using sand mill 4~5h of wet grinding, then is freeze-dried
Obtain nano level SiO2;
Step 2:Step 1 gains are subjected to high temperature cabonization, obtain SiO2@C-materials, then according to SiO2@C:Mg:NaCl matter
Amount is than being 1:1:1~1:1:10 ratio, magnesiothermic reduction under the conditions of 600~750 DEG C, pickling later, washing, drying are made
Si@C nano particles;
Step 3:After Si@C nanos particle made from step 2 and graphene oxide solution ultrasound mixing, pass through spray pyrolysis
Solution technology carries out cladding reduction, and Si@C@G materials are made.
2. the method for preparing silicon-carbon cathode material based on micron silica as described in claim 1, which is characterized in that described
Carbon source is one of glucose, phenolic resin, polyvinylpyrrolidone, polyacrylonitrile.
3. the method for preparing silicon-carbon cathode material based on micron silica as described in claim 1, which is characterized in that step
The temperature of one freeze-drying is -45 DEG C.
4. the method for preparing silicon-carbon cathode material based on micron silica as described in claim 1, which is characterized in that step
Two high temperature cabonization carries out at 450~700 DEG C, and be carbonized 2~4h.
5. the method for preparing silicon-carbon cathode material based on micron silica as described in claim 1, which is characterized in that step
Pickling, washing process described in two are:Impurity is removed using 2mol/L chlorohydric acid picklings, then with 5% hydrofluoric acid wash 30min,
Remove unreacted SiO2, finally washed again to neutrality with deionized water, ethyl alcohol.
6. the method for preparing silicon-carbon cathode material based on micron silica as described in claim 1, which is characterized in that step
Described in three cladding reduction process be:Using be ultrasonically formed spraying, realize be granulated function, then by spherical particle obtained with
H2/ Ar gaseous mixtures are carrier gas, are passed through 600~800 DEG C of vertical tubular furnace and carry out cladding reduction operation, are received finally by electrostatic field
Collection obtains dry Si@C@G materials.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201810219122.8A CN108470891B (en) | 2018-03-16 | 2018-03-16 | Method for preparing silicon-carbon negative electrode material based on micron silicon dioxide |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201810219122.8A CN108470891B (en) | 2018-03-16 | 2018-03-16 | Method for preparing silicon-carbon negative electrode material based on micron silicon dioxide |
Publications (2)
Publication Number | Publication Date |
---|---|
CN108470891A true CN108470891A (en) | 2018-08-31 |
CN108470891B CN108470891B (en) | 2020-12-15 |
Family
ID=63264458
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201810219122.8A Active CN108470891B (en) | 2018-03-16 | 2018-03-16 | Method for preparing silicon-carbon negative electrode material based on micron silicon dioxide |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN108470891B (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109399601A (en) * | 2018-09-14 | 2019-03-01 | 江苏大学 | A kind of preparation method and purposes of nitrogen-phosphor codoping biological carbon materials |
CN113036137A (en) * | 2021-03-05 | 2021-06-25 | 昆山宝创新能源科技有限公司 | Lithium ion battery cathode material and preparation method and application thereof |
CN113998702A (en) * | 2021-10-13 | 2022-02-01 | 昆明理工大学 | Method for preparing Si/C negative electrode material by using micro silicon powder as raw material |
WO2022121137A1 (en) * | 2020-12-10 | 2022-06-16 | 广东凯金新能源科技股份有限公司 | One-dimensional porous silicon-carbon composite negative electrode material, preparation method, and application thereof |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105958036A (en) * | 2016-07-07 | 2016-09-21 | 天津普兰能源科技有限公司 | Preparation method for carbon-coated silicon negative electrode material for lithium ion battery |
CN106374088A (en) * | 2016-10-14 | 2017-02-01 | 浙江天能能源科技股份有限公司 | Method for preparing silicon/carbon composite material with magnesiothermic reduction process |
CN106848273A (en) * | 2017-01-19 | 2017-06-13 | 深圳市沃特玛电池有限公司 | A kind of preparation method of Si-C composite material |
CN107240677A (en) * | 2016-03-28 | 2017-10-10 | 国家纳米科学中心 | A kind of micro-nano structure carbon silicon complex microsphere and its production and use |
-
2018
- 2018-03-16 CN CN201810219122.8A patent/CN108470891B/en active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107240677A (en) * | 2016-03-28 | 2017-10-10 | 国家纳米科学中心 | A kind of micro-nano structure carbon silicon complex microsphere and its production and use |
CN105958036A (en) * | 2016-07-07 | 2016-09-21 | 天津普兰能源科技有限公司 | Preparation method for carbon-coated silicon negative electrode material for lithium ion battery |
CN106374088A (en) * | 2016-10-14 | 2017-02-01 | 浙江天能能源科技股份有限公司 | Method for preparing silicon/carbon composite material with magnesiothermic reduction process |
CN106848273A (en) * | 2017-01-19 | 2017-06-13 | 深圳市沃特玛电池有限公司 | A kind of preparation method of Si-C composite material |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109399601A (en) * | 2018-09-14 | 2019-03-01 | 江苏大学 | A kind of preparation method and purposes of nitrogen-phosphor codoping biological carbon materials |
CN109399601B (en) * | 2018-09-14 | 2021-12-21 | 江苏大学 | Preparation method and application of nitrogen-phosphorus co-doped biochar material |
WO2022121137A1 (en) * | 2020-12-10 | 2022-06-16 | 广东凯金新能源科技股份有限公司 | One-dimensional porous silicon-carbon composite negative electrode material, preparation method, and application thereof |
CN113036137A (en) * | 2021-03-05 | 2021-06-25 | 昆山宝创新能源科技有限公司 | Lithium ion battery cathode material and preparation method and application thereof |
CN113998702A (en) * | 2021-10-13 | 2022-02-01 | 昆明理工大学 | Method for preparing Si/C negative electrode material by using micro silicon powder as raw material |
CN113998702B (en) * | 2021-10-13 | 2023-10-13 | 昆明理工大学 | Method for preparing Si/C anode material by taking micro silicon powder as raw material |
Also Published As
Publication number | Publication date |
---|---|
CN108470891B (en) | 2020-12-15 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN110474032B (en) | Silicon-carbon negative electrode material based on photovoltaic waste silicon and preparation method thereof | |
CN108470891A (en) | The method for preparing silicon-carbon cathode material based on micron silica | |
CN107611394B (en) | Carbon-coated core-shell structure nano silicon/graphene composite negative electrode material and preparation method thereof | |
Cui et al. | High surface area C/SiO2 composites from rice husks as a high-performance anode for lithium ion batteries | |
Ren et al. | Facile synthesis of SiOx@ C composite nanorods as anodes for lithium ion batteries with excellent electrochemical performance | |
CN111799464B (en) | MXene/graphene composite nanosheet, preparation method and application thereof, electrode plate and application thereof | |
CN108550827B (en) | Preparation method and application of three-dimensional porous silicon-carbon anode material | |
WO2017190677A1 (en) | Method for preparing boron-doped porous carbon sphere | |
CN102208634B (en) | Porous silicon/carbon composite material and preparation method thereof | |
CN108199030A (en) | The preparation method of lithium rechargeable battery Nano-porous Si/Graphite/C Composite Anode Materials | |
CN108878813B (en) | Silicon dioxide/lignin porous carbon composite material, preparation method thereof and application thereof in lithium ion battery cathode material | |
CN106571454B (en) | A kind of network-like silicon/graphite composite material and preparation method for lithium battery | |
Du et al. | Si/graphene composite prepared by magnesium thermal reduction of SiO2 as anode material for lithium-ion batteries | |
CN106531972B (en) | Preparation method of lead-graphene composite material for lead-carbon battery | |
CN102881871A (en) | Method for preparing graphite/silicone composite material for negative electrode of lithium ion battery | |
CN103427069A (en) | Lithium ion battery composite anode material and preparation thereof | |
WO2018205761A1 (en) | Method for preparing three-dimensional porous silicon by taking silicate glass as raw material | |
CN110429264B (en) | Method for preparing rice hull-based negative electrode material | |
CN110611092B (en) | Preparation method of nano silicon dioxide/porous carbon lithium ion battery cathode material | |
CN108682813A (en) | A kind of preparation method and application of Si-C composite material | |
CN105047862B (en) | A kind of WS2The preparation method of biology in situ carbon compound cathode materials | |
CN104993110B (en) | A kind of preparation method of composite negative electrode material of lithium ion battery | |
CN108023076A (en) | A kind of cellular Si-C composite material, its preparation method and application | |
CN110890537B (en) | Production method of high-purity nanocrystalline silicon | |
CN105280901B (en) | The preparation method of spherical porous silicon carbide composite particles |
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 |