CN101924196A - Method for greatly improving reversible capacity of graphite - Google Patents
Method for greatly improving reversible capacity of graphite Download PDFInfo
- Publication number
- CN101924196A CN101924196A CN2009100120765A CN200910012076A CN101924196A CN 101924196 A CN101924196 A CN 101924196A CN 2009100120765 A CN2009100120765 A CN 2009100120765A CN 200910012076 A CN200910012076 A CN 200910012076A CN 101924196 A CN101924196 A CN 101924196A
- Authority
- CN
- China
- Prior art keywords
- graphite
- reversible capacity
- nano silicon
- powder
- carbon
- 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
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 69
- 229910002804 graphite Inorganic materials 0.000 title claims abstract description 45
- 239000010439 graphite Substances 0.000 title claims abstract description 45
- 230000002441 reversible effect Effects 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000005229 chemical vapour deposition Methods 0.000 claims abstract description 50
- 239000000843 powder Substances 0.000 claims abstract description 40
- 239000005543 nano-size silicon particle Substances 0.000 claims abstract description 36
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 claims abstract description 21
- 229910001416 lithium ion Inorganic materials 0.000 claims abstract description 21
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 26
- 239000007789 gas Substances 0.000 claims description 24
- 239000003610 charcoal Substances 0.000 claims description 20
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 14
- 229910052786 argon Inorganic materials 0.000 claims description 13
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 claims description 11
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 claims description 11
- 239000012159 carrier gas Substances 0.000 claims description 10
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 8
- 229910052757 nitrogen Inorganic materials 0.000 claims description 7
- 239000000126 substance Substances 0.000 claims description 7
- 239000007792 gaseous phase Substances 0.000 claims description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 6
- 235000013312 flour Nutrition 0.000 claims description 4
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 claims description 4
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 claims description 4
- 239000000377 silicon dioxide Substances 0.000 claims description 4
- 238000000151 deposition Methods 0.000 claims description 3
- 230000008021 deposition Effects 0.000 claims description 3
- 235000013339 cereals Nutrition 0.000 claims description 2
- 229930195733 hydrocarbon Natural products 0.000 claims description 2
- 150000002430 hydrocarbons Chemical class 0.000 claims description 2
- 229910052799 carbon Inorganic materials 0.000 abstract description 24
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 abstract description 12
- 125000004122 cyclic group Chemical group 0.000 abstract description 3
- 239000011863 silicon-based powder Substances 0.000 abstract 2
- 239000011248 coating agent Substances 0.000 abstract 1
- 238000000576 coating method Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 description 12
- 229910052710 silicon Inorganic materials 0.000 description 10
- 239000010703 silicon Substances 0.000 description 10
- 238000010438 heat treatment Methods 0.000 description 8
- 239000005977 Ethylene Substances 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 6
- 238000004062 sedimentation Methods 0.000 description 6
- 238000002411 thermogravimetry Methods 0.000 description 6
- 230000001172 regenerating effect Effects 0.000 description 3
- 239000010406 cathode material Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000003245 coal Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000005518 electrochemistry Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000007770 graphite material Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- MWWATHDPGQKSAR-UHFFFAOYSA-N propyne Chemical compound CC#C MWWATHDPGQKSAR-UHFFFAOYSA-N 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Images
Classifications
-
- 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
- Battery Electrode And Active Subsutance (AREA)
Abstract
The invention relates to a technique for greatly improving the electrochemical performance of graphite, in particular to a method for greatly improving reversible capacity of graphite. The method comprises the following steps of: after carbon is deposited on the surface of nano silicon sphere powder by chemical vapor deposition, mixing silicon powder coated with the carbon and the graphite, namely uniformly coating a carbon layer on the surface of the nano silicon sphere powder by a chemical vapor deposition method, wherein the weight of the carbon layer is 5 to 40 percent; mixing the nano silicon sphere powder coated with the carbon layer and the graphite, wherein the weight of the nano silicon sphere powder is 5 to 20 percent; and preparing a lithium ion battery cathode. The method can greatly improve the reversible capacity of the graphite by adding a little amount of nano silicon sphere powder after the carbon is deposited, improve the primary reversible capacity of the lithium ion battery cathode by 50 to 300 percent compared with the graphite, keep high coulomb efficiency and long cyclic life of the graphite and solve the problems of low reversible capacity, low pure silicon powder coulomb efficiency, poor cyclic life and the like of the current graphite.
Description
Technical field
The present invention relates to increase substantially the technology of graphite electrochemistry performance, be specially a kind of method that increases substantially reversible capacity of graphite, behind nano silicon spheres powder surface chemistry vapour deposition charcoal, the silica flour that is surrounded by charcoal is mixed with graphite, the reversible capacity first of graphite 50-200% be can be improved, and the high enclosed pasture efficient and the long circulation life of graphite kept.
Background technology
The energy is the important substance basis of human social development, but fossil energy storages such as coal, oil and natural gas fall sharply and make the mankind face the pressure of resource exhaustion, and problem of environmental pollution also is on the rise simultaneously.Therefore, the energy and environmental problem have become the focus that countries in the world are paid close attention to.Improve energy use efficiency, development and use regenerative resource, preserve the ecological environment, realize that sustainable development has become national governments and scientific research personnel's common objective and problem.Say that strategically the exploitation regenerative resource is solve energy problem basic, so the research work of this respect has been subjected to extensive concern, lithium ion battery is an important branch in the regenerative resource.
The lithium ion secondary battery negative pole graphite material, cheap and have high enclosed pasture efficient and long cycle life; Yet its theoretical reversible capacity only is 372mAh/g, and the best reversible capacity of report is 350mAh/g.The theoretical reversible capacity of silicon is 4200mAh/g, and the experiment value of report is 3700mAh/g, but all non-constant of its coulomb efficient and cycle life, this has hindered its practical application.(document 1, document 2, Ryu Jh, Kim JVV, Sung YE, Oh SM.Electrochem.Solid State Lett.7:A306 (2004)) present subject matter is: how under the prerequisite that improves the graphite cathode material price not significantly, increase substantially its reversible capacity and keep its coulombic efficiency and long cycle life preferably.
Summary of the invention
The object of the present invention is to provide a kind of method that increases substantially the graphite cathode material reversible capacity, and keep high enclosed pasture efficient of graphite and long cycle life, solve and have that reversible capacity of graphite is low now, problems such as the enclosed pasture efficient of silicon and cycle life difference.
Technical scheme of the present invention is:
A kind of method that increases substantially reversible capacity of graphite, at first, the method by chemical vapour deposition (CVD) is at nano silicon spheres powder coated with uniform charcoal layer, and charcoal layer weight wherein accounts for 5-40% (preferable range is 10-30%); The nano silicon spheres powder that will be coated with the charcoal layer again mixes with graphite, and nano silicon spheres grain weight amount wherein accounts for 5-20% (preferable range is 10-15%), makes lithium ion battery negative; The reversible capacity first of lithium ion battery negative improves 50-300% than graphite, and keeps the high enclosed pasture efficient and the long circulation life of graphite.
The method of described chemical vapour deposition (CVD), process is as follows: nano silicon spheres powder (the ball-type silica flour of average diameter 20-100 nanometer) is placed in the chemical gaseous phase stove, is carrier gas with argon gas or nitrogen, and flow rate of carrier gas is 100-500ml/ minute; Under argon gas or nitrogen protection, temperature in the chemical gaseous phase stove is risen to 600-900 ℃ with 2-20 ℃/minute heating rate; Feed carbon-source gas (gaseous hydrocarbons such as methane, acetylene, ethene or propylene, the volumetric concentration of carbon-source gas is 1-20%) again and carry out chemical vapour deposition (CVD), the chemical vapour deposition (CVD) time is 10 minutes-3 hours, and pressure is normal pressure.
Advantage of the present invention is:
1, the inventive method is simple, carbon evenly can be coated on the surface of nano silicon spheres powder once the step chemical vapour deposition (CVD).
2, the present invention can accurately be controlled at the surface coated carbon content of nano silicon spheres powder by accurately controlling the condition of chemical vapour deposition (CVD).
3, the present invention is by accurately controlling the condition of chemical vapour deposition (CVD), coat the skim charcoal on nano silicon spheres powder surface, the percentage by weight of carbon is accurately controlled between 5-40%, this layer charcoal both can increase the conductivity of silica flour, therefore can certain restriction be arranged to the volumetric expansion of silicon when lithium ion embeds again, it is helpful raising to be contained the efficient first and the cyclical stability of silicon composite cathode.
4, the present invention adds the nano silicon spheres powder that (5-20wt%) on a small quantity is coated with the charcoal layer, can increase substantially the reversible capacity of graphite, the reversible capacity of graphite can be improved 50-300%, and graphite enclosed pasture efficient and long cycle life have preferably been kept, enclosed pasture efficient is about 90% first, 20 times the circulation volume conservation rate is about 60% greater than 80%, 40 circulation volume conservation rate.
Description of drawings
Fig. 1. be coated with the stereoscan photograph of the nano silicon spheres powder of charcoal layer.
Fig. 2. carbon nano silicon spheres powder mixes the cyclic curve of making behind the negative pole with graphite.
Embodiment
Below by embodiment in detail the present invention is described in detail.
Embodiment 1.
With average diameter is that the silicon ball powder of 20 nanometers is placed in the vertical reacting furnace, with the argon gas is carrier gas (flow velocity is 300ml/ minute), be raised to 700 ℃ with 10 ℃/minute heating rates, feed acetylene gas, under this temperature, carry out chemical vapour deposition (CVD), sedimentation time is 15 minutes, and the acetylene volumetric concentration is 5%.Chemical vapour deposition (CVD) is closed acetylene gas after finishing, and drops to room temperature in argon shield.Transmission electron microscope and thermogravimetric analysis show, in nano silicon spheres powder coated with uniform the charcoal layer, the carbon content that coats under this condition is 10wt%, this kind carbon nano silicon spheres powder is evenly mixed with 1: 9 ratio of weight ratio with graphite, make lithium ion battery negative material, stereoscan photograph as shown in Figure 1.The reversible capacity first of lithium ion battery negative material is 600mAh/g, and enclosed pasture efficient is that 90%, 40 circulation volume conservation rate is 61%
Embodiment 2.
With average diameter is that the silicon ball powder of 60 nanometers is placed in the vertical reacting furnace, with nitrogen is carrier gas (flow velocity is 300ml/ minute), be raised to 700 ℃ with 5 ℃/minute heating rates, feed acetylene gas, under this temperature, carry out chemical vapour deposition (CVD), sedimentation time is 45 minutes, and the acetylene volumetric concentration is 5%.Chemical vapour deposition (CVD) is closed acetylene gas after finishing, and drops to room temperature in argon shield.Transmission electron microscope and thermogravimetric analysis show, at nano silicon spheres powder coated with uniform charcoal layer, the carbon content that coats under this condition is 25wt%, this kind carbon nano silicon spheres powder is evenly mixed with 1: 9 ratio of weight ratio with graphite, make lithium ion battery negative material, its charge and discharge cycles curve as shown in Figure 2.The reversible capacity first of lithium ion battery negative material is 670mAh/g, and enclosed pasture efficient is that 91%, 40 circulation volume conservation rate is 62%.
Embodiment 3.
With average diameter is that the silicon ball powder of 50 nanometers is placed in the vertical reacting furnace, with nitrogen is carrier gas (flow velocity is 300ml/ minute), be raised to 800 ℃ with 20 ℃/minute heating rates, feed ethylene gas, under this temperature, carry out chemical vapour deposition (CVD), sedimentation time is 30 minutes, and volume of ethylene concentration is 2%.Chemical vapour deposition (CVD) is closed ethylene gas after finishing, and drops to room temperature in argon shield.Transmission electron microscope and thermogravimetric analysis show that at nano silicon spheres powder coated with uniform charcoal layer, the carbon content that coats under this condition is 18wt%, and this kind carbon nano silicon spheres powder is evenly mixed with 1: 9 ratio of weight ratio with graphite, makes lithium ion battery negative material.The reversible capacity first of lithium ion battery negative material is 700mAh/g, and enclosed pasture efficient is that 92%, 20 circulation volume conservation rate is 81%.
Embodiment 4.
With average diameter is that the silicon ball powder of 50 nanometers is placed in the vertical reacting furnace, with nitrogen is carrier gas (flow velocity is 300ml/ minute), be raised to 800 ℃ with 15 ℃/minute heating rates, feed ethylene gas, under this temperature, carry out chemical vapour deposition (CVD), sedimentation time is 1 hour, and volume of ethylene concentration is 20%.Chemical vapour deposition (CVD) is closed ethylene gas after finishing, and drops to room temperature in argon shield.Transmission electron microscope and thermogravimetric analysis show that at nano silicon spheres powder coated with uniform charcoal layer, the carbon content that coats under this condition is 30wt%, and this kind carbon nano silicon spheres powder is evenly mixed with 2: 8 ratio of weight ratio with graphite, makes lithium ion battery negative material.The reversible capacity first of lithium ion battery negative material is 1200mAh/g, and enclosed pasture efficient is that 90.6%, 40 circulation volume conservation rate is 58%.
With average diameter is that the silicon ball powder of 30 nanometers is placed in the vertical reacting furnace, with the argon gas is carrier gas (flow velocity is 200ml/ minute), be raised to 600 ℃ with 15 ℃/minute heating rates, feed acetylene gas, under this temperature, carry out chemical vapour deposition (CVD), sedimentation time is 30 minutes, and the acetylene volumetric concentration is 10%.Chemical vapour deposition (CVD) is closed acetylene gas after finishing, and drops to room temperature in argon shield.Transmission electron microscope and thermogravimetric analysis show that at nano silicon spheres powder coated with uniform charcoal layer, the carbon content that coats under this condition is 17wt%, and this kind carbon nano silicon spheres powder is evenly mixed with 15: 85 ratio of weight ratio with graphite, makes lithium ion battery negative material.The reversible capacity first of lithium ion battery negative material is 950mAh/g, and enclosed pasture efficient is that 90.1%, 20 circulation volume conservation rate is 80%.
Embodiment 6
With average diameter is that the silicon ball powder of 100 nanometers is placed in the vertical reacting furnace, with the argon gas is carrier gas (flow velocity is 400ml/ minute), be raised to 900 ℃ with 20 ℃/minute heating rates, feed propylene gas, under this temperature, carry out chemical vapour deposition (CVD), sedimentation time is 3 hours, and the propine volumetric concentration is 10%.Chemical vapour deposition (CVD) is closed propylene gas after finishing, and drops to room temperature in argon shield.Transmission electron microscope and thermogravimetric analysis show that at nano silicon spheres powder coated with uniform charcoal layer, the carbon content that coats under this condition is 40wt%, and this kind carbon nano silicon spheres powder is evenly mixed with 5: 95 ratio of weight ratio with graphite, makes lithium ion battery negative material.The reversible capacity first of lithium ion battery negative material is 450mAh/g, and enclosed pasture efficient is that 89.9%, 40 circulation volume conservation rate is 60%.
Embodiment result shows, the present invention can accurately be controlled at the charcoal amount and the degree of crystallinity of nano silicon spheres powder surface deposition by heating rate, time, the carbon source concentration of optimizing chemical vapour deposition (CVD), with carbon nano silicon spheres powder with can increase substantially the reversible capacity of graphite after graphite mixes, and kept the high enclosed pasture efficient and the long cycle life of graphite.
Claims (6)
1. method that increases substantially reversible capacity of graphite is characterized in that: at first, the method by chemical vapour deposition (CVD) is at nano silicon spheres powder coated with uniform charcoal layer, and wherein charcoal layer weight accounts for 5-40%; The nano silicon spheres powder that will be coated with the charcoal layer again mixes with graphite, and nano silicon spheres grain weight amount wherein accounts for 5-20%, makes lithium ion battery negative; The reversible capacity first of lithium ion battery negative improves 50-300% than graphite, and keeps the high enclosed pasture efficient and the long circulation life of graphite.
2. according to the described method that increases substantially reversible capacity of graphite of claim 1, it is characterized in that, the method for described chemical vapour deposition (CVD), process is as follows: the nano silicon spheres powder is placed in the chemical gaseous phase stove, with argon gas or nitrogen is carrier gas, and flow rate of carrier gas is 100-500ml/ minute; Under argon gas or nitrogen protection, temperature in the chemical gaseous phase stove is risen to 600-900 ℃; Feed carbon-source gas again and carry out chemical vapour deposition (CVD), the chemical vapour deposition (CVD) time is 10 minutes-3 hours, thereby at nano silicon spheres powder surface deposition charcoal layer.
3. according to the described method that increases substantially reversible capacity of graphite of claim 2, it is characterized in that: described nano silicon spheres powder is the ball-type silica flour of average diameter 20-100 nanometer.
4. according to the described method that increases substantially reversible capacity of graphite of claim 2, it is characterized in that: described chemical gaseous phase stove is vertical reacting furnace.
5. according to the described method that increases substantially reversible capacity of graphite of claim 2, it is characterized in that: described temperature in the chemical gaseous phase stove is risen in the 600-900 ℃ of process, the speed of intensification is 2-20 ℃/minute.
6. according to the described method that increases substantially reversible capacity of graphite of claim 2, it is characterized in that: described carbon-source gas is meant gaseous hydrocarbons such as methane, acetylene, ethene or propylene; The volumetric concentration of described carbon-source gas is 1-20%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910012076A CN101924196B (en) | 2009-06-17 | 2009-06-17 | Method for greatly improving reversible capacity of graphite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910012076A CN101924196B (en) | 2009-06-17 | 2009-06-17 | Method for greatly improving reversible capacity of graphite |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101924196A true CN101924196A (en) | 2010-12-22 |
| CN101924196B CN101924196B (en) | 2012-10-03 |
Family
ID=43338955
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910012076A Expired - Fee Related CN101924196B (en) | 2009-06-17 | 2009-06-17 | Method for greatly improving reversible capacity of graphite |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101924196B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102394288A (en) * | 2011-11-24 | 2012-03-28 | 深圳市贝特瑞新能源材料股份有限公司 | Silicon-carbon cathode material for lithium ion battery and manufacturing method thereof |
| CN102394287A (en) * | 2011-11-24 | 2012-03-28 | 深圳市贝特瑞新能源材料股份有限公司 | Silicon-carbon negative electrode material of lithium ion battery and preparation method thereof |
| CN103219494A (en) * | 2013-03-31 | 2013-07-24 | 马军昌 | Preparation method of graphite-ferroferric oxide composite cathode material |
| CN103972507A (en) * | 2013-01-30 | 2014-08-06 | 比亚迪股份有限公司 | Negative pole active substance, negative pole piece, pulse buffer single battery containing negative pole piece, pulse buffer battery pack and power battery module |
| CN107293719A (en) * | 2017-06-26 | 2017-10-24 | 合肥国轩高科动力能源有限公司 | Preparation method of silicon-carbon composite material for lithium ion battery cathode |
| CN108172781A (en) * | 2017-12-11 | 2018-06-15 | 浙江大学 | A kind of Si-C composite material of Argent grain doping and its preparation method and application |
| CN112510185A (en) * | 2020-11-30 | 2021-03-16 | 南通路远科技信息有限公司 | Silicon-carbon composite negative electrode material and manufacturing method thereof |
| CN115472809A (en) * | 2022-10-26 | 2022-12-13 | 晖阳(贵州)新能源材料有限公司 | Preparation method of graphite composite material with high first-time efficiency |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4393610B2 (en) * | 1999-01-26 | 2010-01-06 | 日本コークス工業株式会社 | Negative electrode material for lithium secondary battery, lithium secondary battery, and charging method of the secondary battery |
| CN100422112C (en) * | 2005-07-08 | 2008-10-01 | 中国科学院物理研究所 | Carbon-silicon composite material with spherical nucleocapsid, and its preparing method and use |
| CN101265571A (en) * | 2008-04-23 | 2008-09-17 | 华东理工大学 | Lithium ionic cell cathode silicon based compound material preparation method |
-
2009
- 2009-06-17 CN CN200910012076A patent/CN101924196B/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102394288A (en) * | 2011-11-24 | 2012-03-28 | 深圳市贝特瑞新能源材料股份有限公司 | Silicon-carbon cathode material for lithium ion battery and manufacturing method thereof |
| CN102394287A (en) * | 2011-11-24 | 2012-03-28 | 深圳市贝特瑞新能源材料股份有限公司 | Silicon-carbon negative electrode material of lithium ion battery and preparation method thereof |
| CN103972507A (en) * | 2013-01-30 | 2014-08-06 | 比亚迪股份有限公司 | Negative pole active substance, negative pole piece, pulse buffer single battery containing negative pole piece, pulse buffer battery pack and power battery module |
| CN103972507B (en) * | 2013-01-30 | 2016-09-07 | 比亚迪股份有限公司 | A kind of negative electrode active material, negative plate and pulse buffer cell, battery pack and power battery module containing this negative plate |
| CN103219494A (en) * | 2013-03-31 | 2013-07-24 | 马军昌 | Preparation method of graphite-ferroferric oxide composite cathode material |
| CN107293719A (en) * | 2017-06-26 | 2017-10-24 | 合肥国轩高科动力能源有限公司 | Preparation method of silicon-carbon composite material for lithium ion battery cathode |
| CN107293719B (en) * | 2017-06-26 | 2020-03-20 | 合肥国轩高科动力能源有限公司 | Preparation method of silicon-carbon composite material for lithium ion battery cathode |
| CN108172781A (en) * | 2017-12-11 | 2018-06-15 | 浙江大学 | A kind of Si-C composite material of Argent grain doping and its preparation method and application |
| CN112510185A (en) * | 2020-11-30 | 2021-03-16 | 南通路远科技信息有限公司 | Silicon-carbon composite negative electrode material and manufacturing method thereof |
| CN115472809A (en) * | 2022-10-26 | 2022-12-13 | 晖阳(贵州)新能源材料有限公司 | Preparation method of graphite composite material with high first-time efficiency |
| CN115472809B (en) * | 2022-10-26 | 2023-09-01 | 晖阳(贵州)新能源材料有限公司 | Preparation method of graphite composite material with high first efficiency |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101924196B (en) | 2012-10-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101924196B (en) | Method for greatly improving reversible capacity of graphite | |
| CN102394287B (en) | Silicon-carbon negative electrode material of lithium ion battery and preparation method thereof | |
| CN103280560B (en) | The preparation method of the sub-silicon-carbon composite cathode material of the mesoporous oxidation of a kind of lithium ion battery | |
| CN101752547B (en) | Li-ion secondary battery cathode material preparation method with nuclear shell structure | |
| CN105680023A (en) | Preparation method of composite high-magnification silicon-based material, cathode material and lithium battery | |
| CN109148838B (en) | Anode material of lithium-ion battery and its preparation method and application | |
| CN103700819B (en) | Preparation method of silicon composite negative electrode material with gradient change coating layer on surface | |
| CN107342411B (en) | Preparation method of graphene-silicon-carbon lithium ion battery negative electrode material | |
| CN103311514B (en) | A kind of preparation method of modification lithium-ion battery graphite cathode material | |
| CN106887567B (en) | Carbon-coated silicon/graphene composite material and preparation method thereof | |
| CN105152161A (en) | Heteroatom doped surface perforated hollow sphere graphene material, preparation method and application thereof | |
| CN105185970A (en) | Silicon-coated carbon particle composite material and preparation method and equipment and application | |
| CN103208618A (en) | Carbon-sulfur composite positive electrode material of lithium-ion battery and preparation method of material | |
| CN109980190B (en) | Method for preparing silicon-carbon nanotube negative electrode material through catalysis | |
| CN108666543B (en) | Sponge-like C-SiC composite material and preparation method thereof | |
| CN104103821A (en) | Preparation method for silicon-carbon anode material | |
| CN111342014A (en) | Silicon-carbon negative electrode material of lithium ion battery and preparation method thereof | |
| CN111276684A (en) | Preparation method and application of carbon-coated composite material | |
| CN105576221B (en) | A kind of lithium ion battery anode active material presoma and lithium ion battery anode active material and preparation method thereof | |
| CN101944592B (en) | High-capacity silicon-copper/carbon composite cathode material of lithium ion battery and production process thereof | |
| CN102013487A (en) | Carbon/silicon composite lithium ion battery negative material and preparation method thereof | |
| CN115954443A (en) | Preparation method of carbon-coated silicon-copper alloy negative electrode material of lithium ion battery | |
| CN109286010B (en) | In-situ growth method of graphene-coated nano chromium oxide negative electrode material | |
| CN108598377B (en) | Preparation method of sulfur-silicon carbide doped carbon nanotube material | |
| CN105489868A (en) | Lithium ion battery cathode material and preparation method thereof and lithium ion battery |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121003 Termination date: 20150617 |
|
| EXPY | Termination of patent right or utility model |