CN110451480A - Mesoporous carbon nanocoils and its preparation and application - Google Patents
Mesoporous carbon nanocoils and its preparation and application Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/15—Nano-sized carbon materials
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/054—Accumulators with insertion or intercalation of metals other than lithium, e.g. with magnesium or aluminium
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
- H01M4/583—Carbonaceous material, e.g. graphite-intercalation compounds or CFx
- H01M4/587—Carbonaceous material, e.g. graphite-intercalation compounds or CFx for inserting or intercalating light metals
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M2004/021—Physical characteristics, e.g. porosity, surface area
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M2004/026—Electrodes composed of, or comprising, active material characterised by the polarity
- H01M2004/027—Negative electrodes
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The present invention relates to be based on from the synthesising mesoporous carbon nanocoils of etching method and its application, prepared mesoporous carbon nanocoils can be used as kalium ion battery cathode and be applied to electrochemical energy and convert, mesoporous carbon nanocoils, a diameter of 200-300nm, it is distributed uniform mesoporous inside it and interconnects, mesoporous pore size~8nm, mesoporous carbon nanocoils are amorphous state and the structure that hard carbon is presented.The beneficial effects of the present invention are: the present invention effectively improves the micro-structure of pyrolytic carbon, improves potassium memory capacity and coulombic efficiency by constructing mesoporous carbon nanocoils.Using meso-porous nano line as when kalium ion battery cathode, test result shows that mesoporous carbon nanocoils show quick electron-transport and high energy storage in potassium ion storage, is a kind of potential efficiently kalium ion battery negative electrode material.
Description
Technical field
The invention belongs to electrochemical energy transformation technology fields, and in particular to be based on from the synthesising mesoporous carbon nanocoils of etching method
And its application, prepared mesoporous carbon nanocoils can be used as kalium ion battery cathode and are applied to electrochemical energy and convert.
Background technique
The depletion rates such as traditional energy material such as coal, petroleum are fast, and reserves are reduced year by year, and cause destruction to environment,
It is difficult to cope with following energy demand.Therefore, development cost is low, and capacity is high, and the service life energy storage technology of length is extremely urgent.Electricity
Chemical energy storage is considered most potential and is applied to extensive energy storage, and in terms of electrochemical energy storage, performance of lithium ion battery is brilliant,
Applied through being realized in miniaturized electronics, but abundance of the elemental lithium in the earth's crust is lower, lithium mine in distribution on global unevenness, exploitation at
This height, and recoverable rate is low, and these problems require scientific research personnel to continually look for next-generation sustainable and cheap energy storage
Equipment.As the congeners of lithium, potassium element is resourceful, and kalium ion battery is with wider voltage power supply section and quickly
Kinetics of diffusion characteristic becomes the contenders of next-generation energy storage device.Currently, kalium ion battery integrates electrochemistry
Performance still has no small gap compared with lithium ion battery, is badly in need of developing suitable electrode material and battery system.Although early stage
Research has shown that potassium ion can be embedded in graphite layers, has 279mAh g-1High theoretical specific capacity, but biggish volume expansion
(61%) lead to poor high rate performance and shorter service life, therefore, how to improve potassium ion negative electrode material specific capacity and times
Rate performance is a problem.Compared to metal oxide, sulfide, phosphide, carbon material has at low cost, green high-efficient etc. excellent
Gesture, by the concern of researcher.
Since potassium ion dimension is big, kinetics of diffusion is slow, therefore current scientific research personnel lays particular emphasis on and grinds to agraphitic carbon
Study carefully, on the one hand by N, O, S, the element dopings such as P regulate and control the microstructure of carbon, increase the potassium adsorption site at edge and fault location,
Reinforce surface charge storing process, to obtain higher capacity and preferable high rate performance；On the other hand it can pass through Static Spinning
Silk technology constructs nanoscale and three-dimensional carbon nanocoils network structure, transports way to provide rapid kinetics and three-dimensional electronic
Diameter, to substantially improve the chemical property of carbon material.Nevertheless, polymer fabrics can release during high temperature pyrolysis
A large amount of small molecule so that pyrolytic carbon possesses very big specific surface area and micropore abundant, such structure can make size compared with
Small lithium ion free diffusing, but for larger-size potassium ion, excessive specific surface area and small hole result in
Extremely low first circle coulombic efficiency, usually only 30%-40% limit it and play better chemical property.Therefore, development is situated between
Hole carbon nanocoils will be a kind of effective method.Template is to introduce a kind of mesoporous important method.Guo Shaojun et al. with
SBA-15 is the mesoporous carbon that template is prepared for shortrange order, when as kalium ion battery negative electrode material, first circle coulombic efficiency
Reach 63.6%, while having shown higher capacity, but needed to remove template in the carbonized, step is comparatively laborious.Cause
This, will be a kind of method for more effectively preparing even mesoporous material from etching method using template.
Summary of the invention
The present invention provides a kind of based on the side for preparing mesoporous carbon nanocoils from etching method for above-mentioned existing technical problem
Method, preparation process is simple and meets Green Chemistry requirement, obtained amorphous mesoporous carbon nano-material, as potassium ion electricity
When the cathode of pond, excellent chemical property has been shown.
The technical solution that the present invention uses in view of the above technical problems are as follows: mesoporous carbon nanocoils, a diameter of 200-
300nm, inside be distributed uniform mesoporous and interconnect, mesoporous pore size~8nm, mesoporous carbon nanocoils be amorphous state simultaneously
The structure of hard carbon is presented.
The preparation method of the mesoporous carbon nanocoils, comprising the following steps:
1) a certain amount of high molecular weight PVA, middle-molecular-weihydroxyethyl PVA, low molecular weight PVA and Zn (Ac) are weighed2·2H2O is simultaneously dissolved in
In deionized water, water-bath keeps the temperature and mixes slowly, and obtains the colourless spinning solution of transparent and homogeneous；
2) the resulting spinning solution of step 1) is spun under electrostatic interaction silk, and receives and obtains PVA-Zn (Ac)2Nanometer
Line presoma；
3) PVA-Zn (Ac) obtained step 2)2Nanowire precursor is calcined in air, obtains product；
4) product for obtaining step 3) high-temperature calcination in the presence of argon gas takes out after being cooled to room temperature, obtains mesoporous carbon
Nano wire powder.
According to the above scheme, the high molecular weight PVA average molecular weight 180000~200000, middle-molecular-weihydroxyethyl PVA are flat
Average molecular weight 110000~130000, low molecular weight PVA average molecular weight 16000~20000.
According to the above scheme, the quality of high molecular weight PVA described in step 1) is 1-1.4g, and the quality of middle-molecular-weihydroxyethyl PVA is
The quality of 1.4-1.8g, low molecular weight PVA are 1.8-2.2g, Zn (Ac)2·2H2The quality of O is 2.5-3.5g, and deionized water is used
Amount is 35-40mL.
According to the above scheme, the injection needle size 18-21 that electrostatic spinning described in step 2) uses#, injection needle is to connecing
Receive the distance 15-20cm, injection speed 0.03-0.05mm min of device-1, voltage 8-12kV.
According to the above scheme, calcination temperature described in step 3) is 180-240 DEG C, time 1-3h.
According to the above scheme, high-temperature calcination temperature described in step 4) is 800-1000 DEG C, and calcination time is 3-5 hours.
Application of the mesoporous carbon nanocoils as kalium ion battery negative electrode material.
The present invention obtains diameter~200nm mesoporous carbon nanometer using electrostatic spinning early period and later period high-temperature burning process
Line, wherein mesoporous pore size is~8nm, is dispersed in inside carbon nanocoils.Firstly, passing through the PVA of water bath with thermostatic control gradient concentration
With Zn (Ac)2·2H2O is dissolved in the water, and obtains colorless and transparent spinning solution；Then it is linear nanometer to be obtained by electrostatic spinning
The presoma of looks；Finally by high-temperature calcination, PVA thermal decomposition and carbonization, while zinc acetate is decomposed into size~8nm oxidation
Zinc (ZnO) nano particle, ZnO are reduced into Zn simple substance by carbon, left in carbon nanocoils after Zn volatilization it is interconnected mesoporous, most
Mesoporous carbon nanocoils have been obtained eventually.Mesoporous carbon nanocoils can provide three-dimensional electron propagation ducts, the diffusion of faster potassium ion
When this kind of carbon material is as kalium ion battery cathode, therefore there is high coulombic efficiency and high capacity with more active sites,
It is a kind of potential efficient kalium ion battery negative electrode material.
The beneficial effects of the present invention are: the present invention effectively improves micro- knot of pyrolytic carbon by constructing mesoporous carbon nanocoils
Structure improves potassium memory capacity and coulombic efficiency.Using meso-porous nano line as when kalium ion battery cathode, test result shows
In 0.1A g-1Low current density under, first circle coulombic efficiency has reached 72%, first circle discharge capacity 350mAh g-1, circulation 250
Still there is 230mAh g after circle-1Capacity.In 1A g-1High current density under circulation 1000 circle after, capacity remains at
133mAh g-1.Mesoporous carbon nanocoils show quick electron-transport and high energy storage in potassium ion storage, are a kind of latent
Efficient kalium ion battery negative electrode material.
Detailed description of the invention
Fig. 1 is structural evolution figure of the 1 intermediary hole carbon nanocoils of the embodiment of the present invention in high temperature pyrolysis step；
Fig. 2 is PVA-Zn (Ac) in the embodiment of the present invention 12Presoma scanning figure；
Fig. 3 is ZnO-C-600 intermediate product transmission plot in the embodiment of the present invention 1；
Fig. 4 is the XRD diagram of ZnO-C-600 intermediate product in the embodiment of the present invention 1；
Fig. 5 is the transmission plot of 1 intermediary hole carbon nanocoils of the embodiment of the present invention；
Fig. 6 is the high-resolution transmission plot of 1 intermediary hole carbon nanocoils of the embodiment of the present invention；
Fig. 7 is the XRD diagram of 1 intermediary hole carbon nanocoils of the embodiment of the present invention；
Fig. 8 is that the Raman of 1 intermediary hole carbon nanocoils of the embodiment of the present invention schemes
Fig. 9 is 1 intermediary hole carbon nanocoils of the embodiment of the present invention in 0.1mV s-1Cyclic voltammetry curve figure；
Figure 10 is high rate performance figure of the 1 intermediary hole carbon nanocoils of the embodiment of the present invention under change of gradient current density；
Figure 11 is 1 intermediary hole carbon nanocoils of the embodiment of the present invention in 0.1A g-1Long circulating performance map under current density；
Figure 12 is 1 intermediary hole carbon nanocoils of the embodiment of the present invention in 1A g-1Long circulating performance map under current density.
Specific embodiment mode
For a better understanding of the present invention, the content of present invention is illustrated combined with specific embodiments below, but the content of present invention is simultaneously
It is not limited solely to the following examples.
Embodiment 1
Mesoporous carbon nanowire preparation method includes:
1) it weighs 2g low molecular weight PVA (86-89% hydrolysis), 1.6g middle-molecular-weihydroxyethyl PVA (86-89% hydrolysis), 1.2g high
Molecular weight PVA (87-89% hydrolysis), 3g Zn (Ac)2·2H2O is dissolved in 40mL deionized water, and 80 DEG C obtain for water bath with thermostatic control 3 hours
To the spinning solution of clear；
2) the resulting spinning solution of step 1) is transferred in 10mL needle tubing, using 20#Syringe needle, syringe needle and receiver
Distance is 15cm, applies the high pressure of 12kV, obtains within continuous spinning 10 hours the presoma nano wire of white；
3) the presoma nano wire for obtaining step 2) 180 DEG C of calcining 1.5h in air, heating rate are 10 DEG C of min-1,
Obtain yellow product；
4) yellow product for obtaining step 3) is placed in porcelain boat, 800 DEG C of calcining 4h, heating in argon gas in tube furnace
Rate is 5 DEG C of min-1, obtained the final product of black；
By taking the present embodiment intermediary hole carbon nanocoils as an example, material structure evolution process is as shown in Fig. 1 in the present invention.It is first
First, the presoma nano wire (attached drawing 2) that diameter is about 300nm has been obtained by electrostatic spinning.After 600 DEG C of calcinings, transmission electricity
Son is densely dispersed with size~8nm little particle (attached drawing 3) as figure is shown inside nano wire at this time.Scan image is shown in
After 800 DEG C of calcinings, material still keeps the pattern of nano wire.Transmission electron microscope figure (attached drawing 5) and high-resolution transmitted electron are aobvious
Micro mirror figure (attached drawing 6) further demonstrates that there is no little particles inside nano wire, but is dispersed with a large amount of mesoporous, the crystallinity of carbon
It is lower, belong to amorphous carbon.Therefore, obtained nano wire show it is mesoporous be evenly distributed, unbodied design feature.This
Outside, (attached drawing 4) is shown as the diffraction maximum of ZnO, corresponding card No.036-1451 in the XRD spectrum of 600 DEG C of intermediate products, it was demonstrated that
Zinc acetate has resolved into ZnO nano particle, and when temperature reaches 800 DEG C, (attached drawing 7) shows that two are located at 22 ° in XRD spectrum
With 43 ° of broad peak, (002) and (101) crystal face of carbon is respectively corresponded, shows that ZnO is fully converted to volatile Zn simple substance, finally
Product remaining carbon, (attached drawing 8) equally detects the D band and G band for belonging to carbon in the Raman map of mesoporous carbon nanocoils
Signal.
By being to be adopted to electrode with potassium piece using mesoporous carbon nanocoils manufactured in the present embodiment as kalium ion battery cathode
Use GF/D as diaphragm, Potassium Hexafluorophosphate (solvent: the volume ratio of ethylene carbonate and diethyl carbonate is 1:1) conduct of 0.8M
Electrolyte assembles potassium ion half-cell.As shown in Fig. 9, to be mesoporous carbon nanocoils test section and sweep speed in 0.01-3V is
0.1mV s-1Cyclic voltammogram, the oxidation peak at 0.3V represents the abjection of potassium ion.It as shown in Fig. 10, is mesoporous carbon nanometer
High rate performance figure of the line under change of gradient current density, shows in 0.05,0.1,0.2,0.5,1,2,5A g-1Current density
Under, capacity is respectively 288,251,221,184,160,130,82mAh g-1.In addition, attached drawing 11 and Figure 12 are respectively mesoporous carbon
Nano wire is in 0.1A g-1With 1A g-1Long circulating performance map under current density, has embodied the long circulating stability of the material.
Embodiment 2
Mesoporous carbon nanowire preparation method includes:
1) it weighs 2g low molecular weight PVA (86-89% hydrolysis), 1.6g middle-molecular-weihydroxyethyl PVA (86-89% hydrolysis), 1.2g high
Molecular weight PVA (87-89% hydrolysis), 2g Zn (Ac)2·2H2O is dissolved in 40mL deionized water, and 80 DEG C obtain for water bath with thermostatic control 3 hours
To the spinning solution of clear；
2) the resulting spinning solution of step 1) is transferred in 10mL needle tubing, using 18#Syringe needle, syringe needle and receiver
Distance is 15cm, applies the high pressure of 12kV, obtains within continuous spinning 10 hours the presoma nano wire of white；
3) the presoma nano wire for obtaining step 2) 200 DEG C of calcining 1.5h in air, heating rate are 10 DEG C of min-1,
Yellow product is obtained；
4) yellow product for obtaining step 3) is placed in white porcelain boat, in tube furnace in argon gas 900 DEG C of calcining 4h,
Heating rate is 5 DEG C of min-1, obtained the final product of black；
By taking gained carbon nanocoils in the present embodiment as an example, when as kalium ion battery cathode, specific capacity and 1 class of embodiment
Seemingly.In 0.05,0.1,0.2,0.5,1,2,5A g-1Current density under, capacity is respectively 277,246,215,174,150,
118,81mAh g-1.In 1Ag-1High current density under circulation 1000 circle after, capacity remains at 121mAh g-1。
Embodiment 3
Mesoporous carbon nanowire preparation method includes:
1) it weighs 2g low molecular weight PVA (86-89% hydrolysis), 1.6g middle-molecular-weihydroxyethyl PVA (86-89% hydrolysis), 1.2g high
Molecular weight PVA (87-89% hydrolysis), 4g Zn (Ac)2·2H2O is dissolved in 40mL deionized water, and 80 DEG C obtain for water bath with thermostatic control 3 hours
To the spinning solution of clear；
2) the resulting spinning solution of step 1) is transferred in 10mL needle tubing, using 19#Syringe needle, syringe needle and receiver away from
From for 15cm, apply the high pressure of 12kV, obtains within continuous spinning 10 hours the presoma nano wire of white；
3) the presoma nano wire for obtaining step 2) 180 DEG C of calcining 2h in air, heating rate are 10 DEG C of min-1, obtain
Yellow product is arrived；
4) yellow product for obtaining step 3) is placed in porcelain boat, in tube furnace in argon gas 1000 DEG C of calcining 4h, rise
Warm rate is 5 DEG C of min-1, obtained the final product of black；
By taking gained carbon nanocoils in the present embodiment as an example, when as kalium ion battery cathode, specific capacity and 1 class of embodiment
Seemingly.In 0.05,0.1,0.2,0.5,1,2,5A g-1Current density under, capacity is respectively 272,243,225,168,151,
114,79mAh g-1.In 1A g-1High current density under circulation 1000 circle after, capacity remains at 125mAh g-1。
Embodiment 4
Mesoporous carbon nanowire preparation method includes:
1) it weighs 2.2g low molecular weight PVA (86-89% hydrolysis), 1.8g middle-molecular-weihydroxyethyl PVA (86-89% hydrolysis), 1.4g
High molecular weight PVA (87-89% hydrolysis), 3g Zn (Ac)2·2H2O is dissolved in 40mL deionized water, 80 DEG C water bath with thermostatic control 3 hours
Obtain the spinning solution of clear；
2) the resulting spinning solution of step 1) is transferred in 10mL needle tubing, using 20#Syringe needle, syringe needle and receiver
Distance is 15cm, applies the high pressure of 12kV, obtains within continuous spinning 10 hours the presoma nano wire of white；
3) the presoma nano wire for obtaining step 2) 200 DEG C of calcining 1.5h in air, heating rate are 10 DEG C of min-1,
Yellow product is obtained；
4) yellow product for obtaining step 3) is placed in porcelain boat, 800 DEG C of calcining 4h, heating in argon gas in tube furnace
Rate is 4 DEG C of min-1, obtained the final product of black；
By taking gained carbon nanocoils in the present embodiment as an example, when as kalium ion battery cathode, specific capacity and 1 class of embodiment
Seemingly.In 0.05,0.1,0.2,0.5,1,2,5A g-1Current density under, capacity is respectively 276,248,227,178,161,
144,79mAh g-1.In 1A g-1High current density under circulation 1000 circle after, capacity remains at 129mAh g-1。
Embodiment 5
Mesoporous carbon nanowire preparation method includes:
1) it weighs 1.8g low molecular weight PVA (86-89% hydrolysis), 1.4g middle-molecular-weihydroxyethyl PVA (86-89% hydrolysis), 1g high
Molecular weight PVA (87-89% hydrolysis), 3g Zn (Ac)2·2H2O is dissolved in 40mL deionized water, and 80 DEG C obtain for water bath with thermostatic control 3 hours
To the spinning solution of clear；
2) the resulting spinning solution of step 1) is transferred in 10mL needle tubing, using 20#Syringe needle, syringe needle and receiver away from
From for 15cm, apply the high pressure of 12kV, obtains within continuous spinning 10 hours the presoma nano wire of white；
3) the presoma nano wire for obtaining step 2) 200 DEG C of calcining 2h in air, heating rate are 5 DEG C of min-1, obtain
Yellow product is arrived；
4) yellow product for obtaining step 3) is placed in porcelain boat, 800 DEG C of calcining 4h, heating in argon gas in tube furnace
Rate is 10 DEG C of min-1, obtained the final product of black；
By taking gained carbon nanocoils in the present embodiment as an example, when as kalium ion battery cathode, specific capacity and 1 class of embodiment
Seemingly.In 0.05,0.1,0.2,0.5,1,2,5A g-1Current density under, capacity is respectively 278,246,225,188,165,
154,89mAh g-1.In 1A g-1High current density under circulation 1000 circle after, capacity remains at 119mAh g-1。
Claims (8)
1. mesoporous carbon nanocoils, a diameter of 200-300nm, inside be distributed uniform mesoporous and interconnect, mesoporous hole
Diameter~8nm, mesoporous carbon nanocoils are amorphous state and the structure that hard carbon is presented.
2. the preparation method of mesoporous carbon nanocoils described in claim 1, comprising the following steps:
1) a certain amount of high molecular weight PVA, middle-molecular-weihydroxyethyl PVA, low molecular weight PVA and Zn (Ac) are weighed2·2H2O and be dissolved in from
In sub- water, water-bath keeps the temperature and mixes slowly, and obtains the colourless spinning solution of transparent and homogeneous；
2) the resulting spinning solution of step 1) is spun under electrostatic interaction silk, and receives and obtains PVA-Zn (Ac)2Nano wire forerunner
Body；
3) PVA-Zn (Ac) obtained step 2)2Nanowire precursor is calcined in air, obtains product；
4) product for obtaining step 3) high-temperature calcination in the presence of argon gas is taken out after being cooled to room temperature, and obtains mesoporous carbon nanometer
Line powder.
3. the preparation method of mesoporous carbon nanocoils as described in claim 2, it is characterised in that the high molecular weight PVA is flat
Average molecular weight 180000~200000, middle-molecular-weihydroxyethyl PVA average molecular weight 110000~130000, low molecular weight PVA average mark
Son amount 16000~20000.
4. the preparation method of mesoporous carbon nanocoils as described in claim 2, it is characterised in that high molecular weight described in step 1)
The quality of PVA is 1-1.4g, and the quality of middle-molecular-weihydroxyethyl PVA is 1.4-1.8g, and the quality of low molecular weight PVA is 1.8-2.2g, Zn
(Ac)2·2H2The quality of O is 2.5-3.5g, and deionized water dosage is 35-40mL.
5. the preparation method of mesoporous carbon nanocoils as described in claim 2, it is characterised in that electrostatic spinning described in step 2)
The injection needle size 18-21 of use#, the distance 15-20cm of injection needle to receiver, injection speed 0.03-0.05mm
min-1, voltage 8-12kV.
6. the preparation method of mesoporous carbon nanocoils as described in claim 2, it is characterised in that calcination temperature described in step 3)
It is 180-240 DEG C, time 1-3h.
7. by the preparation method of mesoporous carbon nanocoils described in claim 2, it is characterised in that high-temperature calcination temperature described in step 4)
Degree is 800-1000 DEG C, and calcination time is 3-5 hours.
8. application of the mesoporous carbon nanocoils described in claim 1 as kalium ion battery negative electrode material.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103601171A (en) * | 2013-11-06 | 2014-02-26 | 华侨大学 | Preparation method of mesoporous carbon nanofiber |
| CN107119283A (en) * | 2017-04-12 | 2017-09-01 | 上海大学 | The electrochemical preparation method of mesoporous carbon nanocoils |
| CN109087814A (en) * | 2018-08-06 | 2018-12-25 | 武汉理工大学 | Situ Nitrogen Doping porous carbon nanofiber electrode material and its magnanimity preparation method and application |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103601171A (en) * | 2013-11-06 | 2014-02-26 | 华侨大学 | Preparation method of mesoporous carbon nanofiber |
| CN107119283A (en) * | 2017-04-12 | 2017-09-01 | 上海大学 | The electrochemical preparation method of mesoporous carbon nanocoils |
| CN109087814A (en) * | 2018-08-06 | 2018-12-25 | 武汉理工大学 | Situ Nitrogen Doping porous carbon nanofiber electrode material and its magnanimity preparation method and application |
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