CN102544499A - Method for preparing lithium ferrous phosphate (LiFePO4) and carbon nano tube composite cathode material for lithium battery - Google Patents
Method for preparing lithium ferrous phosphate (LiFePO4) and carbon nano tube composite cathode material for lithium battery Download PDFInfo
- Publication number
- CN102544499A CN102544499A CN2012100668396A CN201210066839A CN102544499A CN 102544499 A CN102544499 A CN 102544499A CN 2012100668396 A CN2012100668396 A CN 2012100668396A CN 201210066839 A CN201210066839 A CN 201210066839A CN 102544499 A CN102544499 A CN 102544499A
- Authority
- CN
- China
- Prior art keywords
- lifepo
- carbon
- carbon nano
- lithium battery
- nano tube
- 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.)
- Pending
Links
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
- Carbon And Carbon Compounds (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The invention provides a method for preparing a lithium ferrous phosphate (LiFePO4) and carbon nano tube (CNT) composite cathode material for a lithium battery, and belongs to the field of energy material preparation. The preparation method comprises the following steps of: mixing Fe, a Ni catalyst and LiFePO4 particles, performing catalytic cracking on a carbon source at high temperature, growing CNTs on the surfaces of the particles, and preparing the LiFePO4/CNT composite cathode material. According to the method, the shortcomings that the electronic and ionic conductivity of the LiFePO4 is relatively low and the performance is reduced remarkably during charging and discharging at high power are overcome. The process is simple, products are composited uniformly; a novel cathode material is supplied to the lithium battery; and the method has a certain application prospect.
Description
Technical field
The invention relates to lithium ion battery, particularly a kind of LiFePO 4 and the CNT (LiFePO for preparing lithium ion battery
4/ CNT) the method for composite positive pole.
Background technology
Lithium ion battery has advantages such as high-energy-density, excellent cycle performance, memory-less effect, operating temperature range be wide, in large-sized power field of power supplies such as electric motor cars very big application prospect is arranged.LiFePO 4 (the LiFePO of olivine structural
4) positive electrode has that raw material sources is abundant, cheap, non-environmental-pollution, the higher advantages such as (theoretical capacity 170mAh/g) of capacity become present application focus.
There is electronics in LiFePO 4 and ionic conductivity is lower, high-power performance significantly descends when discharging and recharging shortcoming.Mainly contain carbon coating and metal ion mixing etc. about the method for improving the LiFePO 4 performance at present.
CNT is a kind of novel carbon structure of finding the nineties in 20th century, and it is a kind of hollow tubular structure, and tube wall is one or more layers curling the forming of Graphene.This structure of CNT has excellent electronics, machinery, optics, calorifics and energy-storage property, thereby obtains extensive concern.In recent years, people utilize CNT and energy and material to carry out compound chemical property with the lifting material, like lithium ion battery, solar cell etc.
Summary of the invention
The objective of the invention is, a kind of LiFePO is provided
4The preparation method of/CNT positive electrode prepares advanced composite material (ACM), improves the performance of LiFePO 4, the remarkable shortcoming of decline of performance when overcoming electronics that LiFePO 4 exists and discharging and recharging with ionic conductivity is lower, high-power.
Lithium battery of the present invention has following steps with the preparation method of LiFePO 4 and carbon/carbon nano tube compound anode material:
A kind of lithium battery has following steps with the preparation method of LiFePO 4 and carbon/carbon nano tube compound anode material:
(1) took by weighing catalyst and ferrous phosphate lithium powder in 1: 10～1: 100 by mass ratio, join in absolute ethyl alcohol or the distilled water, grind and stir or ultrasonic mixing 10～60min, 60～80 ℃ of oven dry make the LiFePO 4 carrier of supported catalyst;
Said catalyst is one or several in ferric nitrate, ferrocene, nickelous carbonate, nickel hydroxide, the nickel acetate.
(2) the LiFePO 4 carrier that step (1) is made is tiled on the alumina substrate, and substrate is placed on the quartz boat, and quartz boat is placed on the quartz ampoule pipe head end portion of tube furnace.Feed inert gas 10～30min and get rid of inner air tube.
Said inert gas is a kind of or both mixing in argon gas, the nitrogen.
(3) tube furnace is warming up to 600～850 ℃ of catalytic reaction temperature, pushes quartz boat to stove central authorities, insulation 5～10min; Feed reducing gas, phase carbon source is injected from the tube furnace inlet end, inject 20～40min with the speed of 10～15ml/h with syringe; Under reducing atmosphere; Stop heating and cool to normal temperature with the furnace, take out sample in the tube furnace, obtain LiFePO 4 and carbon nano tube compound material.
Said phase carbon source is a kind of or mixing in ethanol, methyl alcohol, cyclohexane, benzene, the toluene.
Said reducing gas be hydrogen with argon gas, nitrogen in one or any the mixing.
The preferred mass ratio of said step (1) catalyst and ferrous phosphate lithium powder is 1: 40.
The preferred temperature of said step (3) catalytic reaction is 750 ℃.
The preferred charge velocity of said step (3) carbon source is 12ml/h, and preferred injection length is 30min.
The invention has the beneficial effects as follows, a kind of LiFePO is provided
4The preparation method of/CNT positive electrode.This preparation method can be compound with LiFePO 4 particle and even carbon nanotube, improved the electronics of LiFePO 4 and ionic conductivity is lower, high-power performance significantly descends when discharging and recharging shortcoming.Technology of the present invention is simple, product is compound evenly, for lithium battery provides a kind of novel anode material, has certain application prospect.
Description of drawings
Fig. 1 is embodiment 1 prepared LiFePO
4/ CNT composite material scanning electron microscope diagram;
Fig. 2 is embodiment 2 prepared LiFePO
4/ CNT composite material scanning electron microscope diagram;
Fig. 3 is embodiment 3 prepared LiFePO
4/ CNT composite material scanning electron microscope diagram;
Fig. 4 is embodiment 6 prepared LiFePO
4/ CNT composite material scanning electron microscope diagram.
Embodiment
The present invention adopts commercially available chemical pure raw material, through following specific embodiment the present invention is further specified.
Embodiment 1
Take by weighing nickelous carbonate and ferrous phosphate lithium powder at 1: 20 by mass ratio, join in the absolute ethyl alcohol, grind 30min.80 ℃ of oven dry make the LiFePO 4 carrier of supported catalyst.
The LiFePO 4 carrier is tiled on the alumina substrate, and substrate is placed on the quartz boat, and quartz boat is placed on the quartz ampoule pipe head end portion of tube furnace.Ar gas fed with 150sccm speed get rid of inner air tube half an hour.
Tube furnace is warming up to 750 ℃, pushes quartz boat to stove central authorities, behind the 5min, the Ar entraining air stream is adjusted to 300sccm, 15ml/h injection ring hexane, fluid injection 40min.Stop heating, under argon shield, cool to normal temperature with the furnace, take out sample in the tube furnace, be LiFePO
4/ CNT composite material.
Embodiment 2:
Pressed ferrocene and LiFePO 4 mass ratio 1: 20, and took by weighing ferrocene and ferrous phosphate lithium powder, join in the absolute ethyl alcohol, grind and stir 30min.60 ℃ of oven dry make the LiFePO 4 carrier of supported catalyst.
The LiFePO 4 carrier is tiled on the alumina substrate, and substrate is placed on the quartz boat, and quartz boat is placed on the quartz ampoule pipe head end portion of tube furnace.Ar gas fed with 500sccm speed get rid of inner air tube half an hour.
Tube furnace is warming up to 850 ℃, pushes quartz boat to stove central authorities, behind the 5min, the Ar entraining air stream is adjusted to 300sccm, and 15ml/h injects ethanol 30min.Stop heating, under argon shield, cool to normal temperature with the furnace, take out sample in the tube furnace, be LiFePO
4/ CNT composite material.
Embodiment 1,2 prepared LiFePO
4/ CNT composite material and raw material LiFePO 4 conductivity measurements see table 1 for details, can find out the LiFePO with CNT after compound from table 1
4Conductance improves tens of times even nearly a hundred times.
Table 1
| The raw material LiFePO 4 | Embodiment 1 | Embodiment 2 | |
| Conductivity (S/cm) | 3.06×10 -4 | 5.05×10 -3 | 2.15×10 -2 |
Embodiment 3:
Pressed ferric nitrate, nickel hydroxide and LiFePO 4 mass ratio 1: 1: 20, and took by weighing ferric nitrate, nickel hydroxide and ferrous phosphate lithium powder, join in the distilled water, grind and stir 30min.60 ℃ of oven dry make the LiFePO 4 carrier of supported catalyst.
The LiFePO 4 carrier is tiled on the alumina substrate, and substrate is placed on the quartz boat, and quartz boat is placed on the quartz ampoule pipe head end portion of tube furnace.Ar gas fed with 500sccm speed get rid of inner air tube half an hour.
Tube furnace is warming up to 750 ℃, pushes quartz boat to stove central authorities, behind the 5min, the Ar entraining air stream is adjusted to 300sccm, and 15ml/h injects ethanol 40min.Stopping heating, under argon shield, cool to normal temperature with the furnace, take out sample in the tube furnace, be LiFePO
4/ CNT composite material.
Embodiment 4:
Take by weighing nickel acetate and ferrous phosphate lithium powder at 1: 100 by mass ratio, join in the absolute ethyl alcohol, ultrasonic mixing 30min.60 ℃ of oven dry make the LiFePO 4 carrier of supported catalyst.
The LiFePO 4 carrier is tiled on the alumina substrate, and substrate is placed on the quartz boat, and quartz boat is placed on the quartz ampoule pipe head end portion of tube furnace.Ar gas fed with 300sccm speed get rid of inner air tube half an hour.
Tube furnace is warming up to 700 ℃, pushes quartz boat to stove central authorities, behind the 5min, the Ar entraining air stream is adjusted to 150sccm, and 10ml/h injects benzene and 1: 1 mixed liquor 30min of toluene.Stop heating, under nitrogen protection, cool to normal temperature with the furnace, take out sample in the tube furnace, be LiFePO
4/ CNT composite material.
Embodiment 5:
Take by weighing ferric nitrate and ferrous phosphate lithium powder at 1: 100 by mass ratio, join in the absolute ethyl alcohol, grind and stir 30min.60 ℃ of oven dry make the LiFePO 4 carrier of supported catalyst.
The LiFePO 4 carrier is tiled on the alumina substrate, and substrate is placed on the quartz boat, and quartz boat is placed on the quartz ampoule pipe head end portion of tube furnace.Ar gas fed with 500sccm speed get rid of inner air tube half an hour.
Tube furnace is warming up to 800 ℃, pushes quartz boat to stove central authorities, behind the 5min, the Ar entraining air stream is adjusted to 300sccm, feeds H
2100sccm, 15ml/h injects the mixed liquor 30min of 5ml methyl alcohol and 6ml ethanol.Stop heating, under argon shield, cool to normal temperature with the furnace, take out sample in the tube furnace, be LiFePO
4/ CNT composite material.
Embodiment 6:
Take by weighing nickelous carbonate and ferrous phosphate lithium powder at 1: 40 by mass ratio, join in the absolute ethyl alcohol, ultrasonic mixing 30min.60 ℃ of oven dry make the LiFePO 4 carrier of supported catalyst.
The LiFePO 4 carrier is tiled on the alumina substrate, and substrate is placed on the quartz boat, and quartz boat is placed on the quartz ampoule pipe head end portion of tube furnace.Ar gas fed with 150sccm speed get rid of inner air tube half an hour.
Tube furnace is warming up to 600 ℃, pushes quartz boat to stove central authorities, behind the 5min, the Ar entraining air stream is adjusted to 300sccm, 12ml/h injection ring hexane 40min.Stop heating, under inert atmosphere protection, cool to normal temperature with the furnace, take out sample in the tube furnace, be LiFePO
4/ CNT composite material.
The LiFePO that the present invention is prepared
4/ CNT composite material, detection method are for to carry out morphology analysis through scanning electron microscopy to sample, and the conductivity of test material.
Analysis result is following:
Fig. 1 is embodiment 1 prepared LiFePO
4/ CNT composite material scanning electron microscope diagram, white particle is the LiFePO 4 particle among the figure, and the adjacent particle interstitial growth goes out a large amount of crooked bamboo-like carbon nano tubes, and length is about 500nm, diameter 20-40nm.
Fig. 2 is embodiment 2 prepared LiFePO
4/ CNT composite material scanning electron microscope diagram, particle is the LiFePO 4 particle among the figure, there are some agglomerations in the about 200nm of particle diameter.The adjacent particle interstitial growth goes out a large amount of crooked bamboo-like carbon nano tubes, and length has several microns approximately.Diameter is about 20nm.
Fig. 3 is embodiment 3 prepared LiFePO
4/ CNT composite material scanning electron microscope diagram can find out among the figure that the inferior lithium particle of adjacent phosphoric acid zone line grows a large amount of crooked bamboo-like carbon nano tubes, carbon pipe diameter 20-40nm, and length can reach several microns.
Fig. 4 is embodiment 6 prepared LiFePO
4/ CNT composite material scanning electron microscope diagram grows some crooked bamboo-like carbon nano tubes between the LiFePO 4 adjacent particle among the figure, carbon pipe diameter 20-50nm.
Above-mentioned description to embodiment is to be convenient to the those of ordinary skill of this technical field can understand and use the present invention.The personnel of skilled obviously can easily make various modifications to these embodiment, and needn't pass through performing creative labour being applied in the General Principle of this explanation among other embodiment.Therefore, the invention is not restricted to the embodiment here, those skilled in the art should be within protection scope of the present invention for improvement and modification that the present invention makes according to announcement of the present invention.
Claims (4)
1. a lithium battery has following steps with the preparation method of LiFePO 4 and carbon/carbon nano tube compound anode material:
(1) took by weighing catalyst and ferrous phosphate lithium powder in 1: 10～1: 100 by mass ratio, join in absolute ethyl alcohol or the distilled water, grind and stir or ultrasonic mixing 10～60min, 60～80 ℃ of oven dry make the LiFePO 4 carrier of supported catalyst;
Said catalyst is one or several in ferric nitrate, ferrocene, nickelous carbonate, nickel hydroxide, the nickel acetate;
(2) the LiFePO 4 carrier that step (1) is made is tiled on the alumina substrate, and substrate is placed on the quartz boat, and quartz boat is placed on the quartz ampoule pipe head end portion of tube furnace; Feed inert gas 10～30min and get rid of inner air tube;
Said inert gas is a kind of or both mixing in argon gas, the nitrogen;
(3) tube furnace is warming up to 600～850 ℃ of catalytic reaction temperature, pushes quartz boat to stove central authorities, insulation 5～10min feeds reducing gas, with syringe phase carbon source is injected from the tube furnace inlet end, injects 20～40min with the speed of 10～15ml/h; Stop heating, under inert atmosphere protection, cool to normal temperature with the furnace, take out sample in the tube furnace, obtain LiFePO 4 and carbon nano tube compound material.
Said reducing gas be hydrogen with argon gas, nitrogen in one or any the mixing;
Said phase carbon source is the one or any mixing in ethanol, methyl alcohol, cyclohexane, benzene, the toluene.
2. according to the lithium battery of claim 1 preparation method, it is characterized in that the preferred mass ratio of said step (1) catalyst and ferrous phosphate lithium powder is 1: 40 with LiFePO 4 and carbon/carbon nano tube compound anode material.
3. according to the lithium battery of claim 1 preparation method, it is characterized in that the preferred temperature of said step (3) catalytic reaction is 750 ℃ with LiFePO 4 and carbon/carbon nano tube compound anode material.
4. according to the lithium battery of claim 1 preparation method with LiFePO 4 and carbon/carbon nano tube compound anode material, it is characterized in that the preferred charge velocity of said step (3) carbon source is 12ml/h, preferred injection length is 30min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100668396A CN102544499A (en) | 2012-03-14 | 2012-03-14 | Method for preparing lithium ferrous phosphate (LiFePO4) and carbon nano tube composite cathode material for lithium battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100668396A CN102544499A (en) | 2012-03-14 | 2012-03-14 | Method for preparing lithium ferrous phosphate (LiFePO4) and carbon nano tube composite cathode material for lithium battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102544499A true CN102544499A (en) | 2012-07-04 |
Family
ID=46350877
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100668396A Pending CN102544499A (en) | 2012-03-14 | 2012-03-14 | Method for preparing lithium ferrous phosphate (LiFePO4) and carbon nano tube composite cathode material for lithium battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102544499A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102856549A (en) * | 2012-09-25 | 2013-01-02 | 福建师范大学 | Method for preparing carbon nano tube coated lithium iron phosphate cathode material |
| CN102856550A (en) * | 2012-09-25 | 2013-01-02 | 福建师范大学 | Method for preparing titanium modified and carbon nano tube coated lithium iron phosphate cathode material |
| CN102916183A (en) * | 2012-10-16 | 2013-02-06 | 上海锦众信息科技有限公司 | Preparation method of lithium iron phosphate composite material of lithium ion battery |
| CN103265001A (en) * | 2013-05-02 | 2013-08-28 | 杭州电子科技大学 | Method for preparing carbon-coated lithium iron phosphate from basic lithium iron phosphate |
| CN103606679A (en) * | 2013-10-16 | 2014-02-26 | 贵州特力达纳米碳素科技有限公司 | Preparation method of nanometer charcoal electrode composite material |
| CN103682337A (en) * | 2013-12-23 | 2014-03-26 | 山东大学 | Low-content highly graphitized carbon-coated lithium iron phosphate |
| CN107706369A (en) * | 2017-09-08 | 2018-02-16 | 绵阳梨坪科技有限公司 | A kind of preparation method of CNT and LiFePO 4 composite positive pole |
| CN109336077A (en) * | 2018-08-29 | 2019-02-15 | 深圳市德方纳米科技股份有限公司 | A kind of lithium iron phosphate positive material and preparation method thereof |
| CN110911655A (en) * | 2018-09-18 | 2020-03-24 | 中信国安盟固利动力科技有限公司 | Self-assembled super-fast-charging positive electrode material and lithium ion battery thereof |
| CN111725516A (en) * | 2020-07-01 | 2020-09-29 | 中南大学 | LiFePO4Preparation method of/CNTs composite positive electrode material |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101442126A (en) * | 2008-08-01 | 2009-05-27 | 上海华实纳米材料有限公司 | Carbon nanotube key joint lithium iron phosphate composite electrode material and preparation method thereof |
| CN101533904A (en) * | 2009-04-24 | 2009-09-16 | 长沙理工大学 | Method for preparing lithium iron phosphate/nanometer carbon composite anode material |
-
2012
- 2012-03-14 CN CN2012100668396A patent/CN102544499A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101442126A (en) * | 2008-08-01 | 2009-05-27 | 上海华实纳米材料有限公司 | Carbon nanotube key joint lithium iron phosphate composite electrode material and preparation method thereof |
| CN101533904A (en) * | 2009-04-24 | 2009-09-16 | 长沙理工大学 | Method for preparing lithium iron phosphate/nanometer carbon composite anode material |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102856549B (en) * | 2012-09-25 | 2014-11-05 | 福建师范大学 | Method for preparing carbon nano tube coated lithium iron phosphate cathode material |
| CN102856550A (en) * | 2012-09-25 | 2013-01-02 | 福建师范大学 | Method for preparing titanium modified and carbon nano tube coated lithium iron phosphate cathode material |
| CN102856549A (en) * | 2012-09-25 | 2013-01-02 | 福建师范大学 | Method for preparing carbon nano tube coated lithium iron phosphate cathode material |
| CN102916183A (en) * | 2012-10-16 | 2013-02-06 | 上海锦众信息科技有限公司 | Preparation method of lithium iron phosphate composite material of lithium ion battery |
| CN103265001A (en) * | 2013-05-02 | 2013-08-28 | 杭州电子科技大学 | Method for preparing carbon-coated lithium iron phosphate from basic lithium iron phosphate |
| CN103606679A (en) * | 2013-10-16 | 2014-02-26 | 贵州特力达纳米碳素科技有限公司 | Preparation method of nanometer charcoal electrode composite material |
| CN103606679B (en) * | 2013-10-16 | 2016-08-17 | 贵州特力达纳米碳素科技有限公司 | A kind of preparation method of nano carbon electrode composite material |
| CN103682337A (en) * | 2013-12-23 | 2014-03-26 | 山东大学 | Low-content highly graphitized carbon-coated lithium iron phosphate |
| CN103682337B (en) * | 2013-12-23 | 2015-10-21 | 山东大学 | A kind of low content high graphitization carbon-coated LiFePO 4 for lithium ion batteries |
| CN107706369A (en) * | 2017-09-08 | 2018-02-16 | 绵阳梨坪科技有限公司 | A kind of preparation method of CNT and LiFePO 4 composite positive pole |
| CN109336077A (en) * | 2018-08-29 | 2019-02-15 | 深圳市德方纳米科技股份有限公司 | A kind of lithium iron phosphate positive material and preparation method thereof |
| CN110911655A (en) * | 2018-09-18 | 2020-03-24 | 中信国安盟固利动力科技有限公司 | Self-assembled super-fast-charging positive electrode material and lithium ion battery thereof |
| CN111725516A (en) * | 2020-07-01 | 2020-09-29 | 中南大学 | LiFePO4Preparation method of/CNTs composite positive electrode material |
| CN111725516B (en) * | 2020-07-01 | 2023-05-05 | 中南大学 | LiFePO 4 Preparation method of CNTs composite positive electrode material |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102544499A (en) | Method for preparing lithium ferrous phosphate (LiFePO4) and carbon nano tube composite cathode material for lithium battery | |
| CN107093732B (en) | A kind of lithium iron phosphate/carbon nano-tube nano composite material and preparation method for anode material of lithium battery | |
| CN101540390B (en) | Composite cathode material of lithium ion battery and preparation method thereof | |
| CN102427130B (en) | Lithium iron phosphate-carbon nanotube composite material, preparation method, and application thereof | |
| CN101442126B (en) | Carbon nanotube key joint lithium iron phosphate composite electrode material and preparation method thereof | |
| CN103384007A (en) | Carbon nano tube/graphene composite negative pole material, preparation method thereof and lithium battery | |
| CN103794788B (en) | Surface carbon coating method of lithium iron phosphate anode material | |
| CN108470891B (en) | Method for preparing silicon-carbon negative electrode material based on micron silicon dioxide | |
| CN104332616A (en) | Graphene coated graphite composite lithium ion battery negative material and its preparation method | |
| CN103682384B (en) | A kind of composite carbon electrode for all-vanadium flow battery and preparation method thereof | |
| CN103407989A (en) | Low-temperature environmentally-friendly preparation method of nitrogen edge doped graphene | |
| CN100369809C (en) | Carbon wool ball material and its preparation method and uses | |
| CN109980190B (en) | Method for preparing silicon-carbon nanotube negative electrode material through catalysis | |
| CN101355150A (en) | Method for preparing graphitic carbon nanometer tube combination electrode material for lithium ion battery | |
| CN103647072B (en) | A kind of nickel oxide surfaces carbon/nitrogen content is than the preparation method of adjustable nitrogen-doped carbon integument | |
| WO2023093448A1 (en) | Silicon-carbon negative electrode material of lithium-ion battery, preparation method therefor and application thereof | |
| CN104779371A (en) | Preparation method of nitrogen-doped carbon nanotube thin film having high electrochemical properties | |
| CN101195483A (en) | Method for mass production of bamboo joint shaped carbon nano-tube by adopting chemical vapor deposition method | |
| CN102146641A (en) | Process for manufacturing modified carbon fiber paper by adopting carbon nanotube implanting method | |
| CN107904570B (en) | method for preparing nickel nanoparticle-graphene-nickel foam material | |
| CN110048092B (en) | Lithium battery silicon-carbon composite material and preparation method thereof | |
| CN108963237B (en) | Preparation method of sodium ion battery negative electrode material | |
| CN107069000B (en) | Silicon-carbon-manganese composite negative electrode material of lithium ion battery and preparation method thereof | |
| CN102306792A (en) | High-conductivity exfoliated graphite lithium ion battery anode material and preparation method thereof | |
| CN110203920A (en) | A kind of preparation method of chemical vapor deposition modified graphite |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120704 |