CN106784736A - A kind of sodium-ion battery negative pole coats the preparation method and application of tin particles nanometer sheet with coal tar pitch resin base amorphous carbon - Google Patents
A kind of sodium-ion battery negative pole coats the preparation method and application of tin particles nanometer sheet with coal tar pitch resin base amorphous carbon Download PDFInfo
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- CN106784736A CN106784736A CN201710069506.1A CN201710069506A CN106784736A CN 106784736 A CN106784736 A CN 106784736A CN 201710069506 A CN201710069506 A CN 201710069506A CN 106784736 A CN106784736 A CN 106784736A
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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
- H01M4/362—Composites
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y40/00—Manufacture or treatment of nanostructures
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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
- H01M4/38—Selection of substances as active materials, active masses, active liquids of elements or alloys
- H01M4/387—Tin or alloys based on tin
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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
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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
- H01M2220/00—Batteries for particular applications
- H01M2220/10—Batteries in stationary systems, e.g. emergency power source in plant
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- 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
The present invention relates to carbon material preparing technical field, a kind of sodium-ion battery negative pole coats the preparation method and application of tin particles nanometer sheet with coal tar pitch resin base amorphous carbon.Preparation method includes procedure below：Saturated aqueous sodium chloride is added dropwise in absolute ethyl alcohol, dry cake is obtained sodium chloride template after suction filtration, coal tar pitch resin, stannous chloride, pore creating material polymethyl methacrylate and sodium chloride template are added in N-methyl pyrrolidones by a certain percentage, agitating heating solvent evaporated, the mixture that will be obtained again carries out carbonization treatment, room temperature taking-up is cooled to, is adopted and sodium chloride template is washed with deionized and is dried, obtained target material and be applied particularly in sodium-ion battery.The present invention has advantages below：One is, the carbon source and pore creating material wide material sources that use, cheap；Two are, sodium chloride template and N-methyl pyrrolidinone solvent can be recycled, low production cost；Three are, the target material of preparation shows reversible storage sodium capacity higher, preferable high rate performance and excellent cycle performance as anode material of lithium-ion battery.
Description
Technical field
The present invention relates to a kind of sodium-ion battery negative pole tin particles nanometer sheet is coated with coal tar pitch resin base amorphous carbon
Preparation method and application, belongs to carbon material preparing technical field.
Background technology
As the mankind are to coal, the exploitation and utilization of oil equal energy source, its reserves increasingly depleted simultaneously result in increasingly severe
Problem of environmental pollution, the exploitation of clean energy resource is the key issue for being related to human social.Therefore, wind energy,
The utilization of the green novel energy sources such as solar energy, tide energy receives more and more extensive concern.Clean energy resource mostly have it is intermittent,
The features such as randomness, is, it is necessary to huge energy-storage system ensures lasting, the stable output of energy.Lithium ion battery is to apply at present most
One of extensive electrochemical energy storage device, has the advantages that energy density is high, has extended cycle life.But lithium resource contains in the earth's crust
Limited and skewness is measured, lithium ion battery causes lithium ore to hold at high price the great demand of lithium resource, is unfavorable for it
Utilization in inexpensive large-scale energy storage system.Sodium has close physicochemical properties, and reserves very abundant with lithium, has
Beneficial to the exploitation of inexpensive sodium-ion battery.Research sodium-ion battery is used for following low cost large-scale energy storage system and rationally may be used
OK.
The negative material that sodium-ion battery is used mainly has amorphous carbon, transition metal sulfide, tin, antimony etc..Wherein without
Setting carbon has the advantages that structure is easy to regulation and control, low cost, good cycling stability, but its storage sodium finite capacity.The metals such as tin have
There is specific capacity higher, but cyclical stability is poor.Therefore by metal composites such as amorphous carbon and tin, it is expected to obtain specific capacity
The high, anode material of lithium-ion battery of good cycling stability.[Datta M K, Epur R, Saha P, the et al.Tin such as Datta
and graphite based nanocomposites:Potential anode for sodium ion batteries
[J].Journal of Power Sources,2013,225:316-322.] by high-energy mechanical ball milling method by tin and graphite
Micron particles are combined, and the specific capacity of negative material is greatly improved.But due to the reason, material such as tin particles are larger
Stable circulation performance it is unsatisfactory.It is to solve carbon/tin composite material in sodium by tin particles nanosizing and using carbon coating structure
The feasible way of stability in ion battery.
The microscopic appearance and structure of carbon/tin composite material can influence material with electrolyte contacts area, sodium ion diffusion road
Footpath etc., finally influences material electrochemical performance.Nanometer sheet with suitable pore passage structure has, sodium big with electrolyte contacts area
The advantages of ion transmission path is short, by researcher's extensive concern.Traditional carbon nanosheet, as template, is carbonized with metal oxide etc.
After need pickling to remove removing template, preparation technology is complicated and easily pollutes environment, is unfavorable for large-scale production.
The content of the invention
In order to overcome the deficiencies in the prior art, dripped with coal it is an object of the present invention to provide a kind of sodium-ion battery negative pole
Blue or green resin base amorphous carbon coats the preparation method and application of tin particles nanometer sheet.The preparation method preparation process is simple, raw material
Abundance, prepared composite has specific capacity high as sodium-ion battery negative pole, good rate capability and cycle performance
Excellent the advantages of.
In order to realize foregoing invention purpose, solving oneself has problem present in technology, and the present invention is adopted the technical scheme that：
A kind of sodium-ion battery negative pole coats the preparation method of tin particles nanometer sheet, including following step with coal tar pitch resin base amorphous carbon
Suddenly：
Step 1, at room temperature, saturated aqueous sodium chloride is added dropwise in absolute ethyl alcohol, and dry cake is obtained after suction filtration
Sodium chloride template, the saturated aqueous sodium chloride is 1 with absolute ethyl alcohol mass ratio:3-20, filtration cakes torrefaction temperature control is in 70-
100 DEG C, drying time is controlled in 1-5h；
Step 2, coal tar pitch resin is dissolved in N-methyl pyrrolidones, adds stannous chloride and the poly- methyl-prop of pore creating material
E pioic acid methyl ester, is added thereto to as sodium chloride template obtained in step 1 after being completely dissolved, stirring lower solvent evaporated, the solvent
At 150-210 DEG C, coal tar pitch resin is 1 with the mass ratio of N-methyl pyrrolidones for vapo(u)rizing temperature control:10-50, coal tar pitch tree
Fat is 1 with the mass ratio of pore creating material polymethyl methacrylate:0.1-2, coal tar pitch resin is 1 with the mass ratio of stannous chloride:
0.5-5, coal tar pitch resin is 1 with the mass ratio of sodium chloride template:1-20；
Step 3, the mixture for obtaining step 2 carry out carbonization treatment under inert gas shielding, temperature with 2-10 DEG C/
Min heating rates rise to 600-900 DEG C, and constant temperature 1-3h, the inert gas is selected from the one kind in nitrogen or argon gas；
Sample is cooled to room temperature taking-up after step 4, the carbonization treatment for obtaining step 3, adopts and chlorination is washed with deionized
Sodium template is simultaneously dried, and at 80-120 DEG C, time control obtains target material coal tar pitch resin base to temperature control in 4-12h
Amorphous carbon coats tin particles nanometer sheet.
The preparation method, the coal tar pitch resin base amorphous carbon of preparation coats tin particles nanometer sheet in sodium-ion battery side
Application in face.
Present invention has the advantages that：A kind of sodium-ion battery negative pole coal tar pitch resin base amorphous carbon cladding tin particles are received
The preparation method and application of rice piece.Wherein, preparation method is comprised the following steps：(1) at room temperature, by saturated aqueous sodium chloride by
It is added dropwise in absolute ethyl alcohol, dry cake is obtained sodium chloride template after suction filtration, and coal tar pitch resin is dissolved in N-methyl pyrrolidines by (2)
In ketone, and stannous chloride and pore creating material polymethyl methacrylate are added, be added thereto to as obtained in step 1 after being completely dissolved
Sodium chloride template, the lower solvent evaporated of stirring, the mixture that (3) obtain step 2 carries out carbonization treatment under inert gas shielding,
(4) sample is cooled to room temperature taking-up after the carbonization treatment for obtaining step 3, adopts and sodium chloride template is washed with deionized and carries out
Dry, obtain target material coal tar pitch resin base amorphous carbon cladding tin particles nanometer sheet.Compared with the prior art, present invention tool
Have the advantage that：One is, the carbon source and pore creating material wide material sources that use, cheap, tin particles below 10 nanometers, in carbon materials
Decentralization is high in material matrix；Two are, preparation method is simple and easy to apply, using water-soluble sodium chloride template, environmental protection, sodium chloride mould
Plate and N-methyl pyrrolidinone solvent can be recycled, and production cost is relatively low, it is easy to accomplish large-scale production；Three are, prepare
Coal tar pitch resin base amorphous carbon cladding tin particles nanometer sheet shown as anode material of lithium-ion battery it is higher reversible
Storage sodium capacity, preferable high rate performance and excellent cycle performance.
Brief description of the drawings
Fig. 1 is the scanning electricity of coal tar pitch resin base amorphous carbon cladding tin particles nanometer sheet prepared by the embodiment of the present invention 1
Mirror photo figure.
Fig. 2 is the transmission electricity of coal tar pitch resin base amorphous carbon cladding tin particles nanometer sheet prepared by the embodiment of the present invention 1
Mirror photo figure.
Fig. 3 is that the X-ray of coal tar pitch resin base amorphous carbon cladding tin particles nanometer sheet prepared by the embodiment of the present invention 1 is spread out
Penetrate collection of illustrative plates.
Fig. 4 is that coal tar pitch resin base amorphous carbon prepared by the embodiment of the present invention 1 coats tin particles nanometer sheet in sodium ion
Charge-discharge performance curve map in half-cell under different current densities.
Specific embodiment
With reference to embodiment, the invention will be further described.
Embodiment 1
At room temperature, 150g saturated aqueous sodium chlorides are added dropwise in 500g absolute ethyl alcohols, suction filtration and by filter cake 90
DEG C dry 2h and sodium chloride template is obtained；2g coal tar pitch resins are dissolved in 60g N-methyl pyrrolidones, 3g bis- is added thereto to
Stannic chloride, 1g pore creating material polymethyl methacrylates, add 20g sodium chloride templates after being completely dissolved, stirring adds in 205 DEG C of oil baths
Heat is evaporated N-methyl pyrrolidones；The mixture carbonization that will be obtained, 700 are warming up in tube furnace under argon gas protection with 5 DEG C/min
DEG C and constant temperature 2h, taken out after cooling, sodium chloride template is washed with deionized, dry 5h at 100 DEG C, the drip of target material coal is obtained
Blue or green resin base amorphous carbon coats tin particles nanometer sheet, its stereoscan photograph figure as shown in figure 1, transmission electron microscope photo figure is as schemed
Shown in 2, X ray diffracting spectrum is as shown in Figure 3.By coal tar pitch resin base amorphous carbon cladding tin particles nanometer sheet and acetylene black,
PVDF (polyvinylidene fluoride) is according to 7:2:1 mass ratio prepares negative material, and collector is Copper Foil, in glove box assemble sodium from
Sub- battery.Battery performance is tested on Land CT2001A type battery test systems, charging/discharging voltage scope is 0.01-
3V, measures the material in charge-discharge velocity 0.1A g-1Under conditions of reversible capacity reach 613.7mAh g-1, its charge-discharge performance song
Line chart is as shown in Figure 4.
Embodiment 2
At room temperature, 250g saturated aqueous sodium chlorides are added dropwise in 1000g absolute ethyl alcohols, suction filtration simultaneously exists filter cake
100 DEG C dry 1h and sodium chloride template are obtained；2g coal tar pitch resins are dissolved in 40g N-methyl pyrrolidones, are added thereto to
3g stannous chloride, 2g pore creating material polymethyl methacrylates, add 20g sodium chloride templates after being completely dissolved, stirred in 200 DEG C of oil baths
Mix heating and be evaporated N-methyl pyrrolidones；The mixture carbonization that will be obtained, is warming up under argon gas protection in tube furnace with 5 DEG C/min
800 DEG C and constant temperature 2h, taken out after cooling, sodium chloride template is washed with deionized, 8h is dried at 90 DEG C, target material coal is obtained
Asphaltic resin base amorphous carbon coats tin particles nanometer sheet.Coal tar pitch resin base amorphous carbon is coated into tin particles nanometer sheet and second
Acetylene black, PVDF (polyvinylidene fluoride) are according to 7:2:1 mass ratio prepares negative material, and collector is Copper Foil, the group in glove box
Dress sodium-ion battery.Battery performance, charging/discharging voltage scope are tested on Land CT2001A type battery test systems
It is 0.01-3V, measures the material in charge-discharge velocity 0.1A g-1Under conditions of reversible capacity reach 529.2mAh g-1。
Embodiment 3
At room temperature, 130g saturated aqueous sodium chlorides are added dropwise in 600g absolute ethyl alcohols, suction filtration and by filter cake 80
DEG C dry 3h and sodium chloride template is obtained；2g coal tar pitch resins are dissolved in 80g N-methyl pyrrolidones, 2g bis- is added thereto to
Stannic chloride, 1g pore creating material polymethyl methacrylates, add 20g sodium chloride templates after being completely dissolved, stirring adds in 205 DEG C of oil baths
Heat is evaporated N-methyl pyrrolidones；The mixture carbonization that will be obtained, 700 are warming up in tube furnace under argon gas protection with 5 DEG C/min
DEG C and constant temperature 1h, taken out after cooling, sodium chloride template is washed with deionized, dry 8h at 90 DEG C, the drip of target material coal is obtained
Blue or green resin base amorphous carbon coats tin particles nanometer sheet.Coal tar pitch resin base amorphous carbon is coated into tin particles nanometer sheet and acetylene
Black, PVDF (polyvinylidene fluoride) is according to 7:2:1 mass ratio prepares negative material, and collector is Copper Foil, is assembled in glove box
Sodium-ion battery.Battery performance is tested on Land CT2001A type battery test systems, charging/discharging voltage scope is
0.01-3V, measures the material in charge-discharge velocity 0.1A g-1Under conditions of reversible capacity reach 486.5mAh g-1。
Embodiment 4
At room temperature, 120g saturated aqueous sodium chlorides are added dropwise in 400g absolute ethyl alcohols, suction filtration and by filter cake 90
DEG C dry 2h and sodium chloride template is obtained；2g coal tar pitch resins are dissolved in 60g N-methyl pyrrolidones, 5g bis- is added thereto to
Stannic chloride, 1g pore creating material polymethyl methacrylates, add 20g sodium chloride templates after being completely dissolved, stirring adds in 190 DEG C of oil baths
Heat is evaporated N-methyl pyrrolidones；The mixture carbonization that will be obtained, 800 are warming up in tube furnace under argon gas protection with 5 DEG C/min
DEG C and constant temperature 1h, taken out after cooling, sodium chloride template is washed with deionized, dry 5h at 100 DEG C, the drip of target material coal is obtained
Blue or green resin base amorphous carbon coats tin particles nanometer sheet.Coal tar pitch resin base amorphous carbon is coated into tin particles nanometer sheet and acetylene
Black, PVDF (polyvinylidene fluoride) is according to 7:2:1 mass ratio prepares negative material, and collector is Copper Foil, is assembled in glove box
Sodium-ion battery.Battery performance is tested on Land CT2001A type battery test systems, charging/discharging voltage scope is
0.01-3V, measures the material in charge-discharge velocity 0.1Ag-1Under conditions of reversible capacity reach 586.9mAh g-1。
Embodiment 5
At room temperature, 125g saturated aqueous sodium chlorides are added dropwise in 500g absolute ethyl alcohols, suction filtration and by filter cake 100
DEG C dry 1h and sodium chloride template is obtained；2g coal tar pitch resins are dissolved in 60g N-methyl pyrrolidones, 3g bis- is added thereto to
Stannic chloride, 2g pore creating material polymethyl methacrylates, add 20g sodium chloride templates after being completely dissolved, stirring adds in 205 DEG C of oil baths
Heat is evaporated N-methyl pyrrolidones；The mixture carbonization that will be obtained, 700 are warming up in tube furnace under nitrogen protection with 5 DEG C/min
DEG C and constant temperature 1h, taken out after cooling, sodium chloride template is washed with deionized, dry 4h at 110 DEG C, the drip of target material coal is obtained
Blue or green resin base amorphous carbon coats tin particles nanometer sheet.Coal tar pitch resin base amorphous carbon is coated into tin particles nanometer sheet and acetylene
Black, PVDF (polyvinylidene fluoride) is according to 7:2:1 mass ratio prepares negative material, and collector is Copper Foil, is assembled in glove box
Sodium-ion battery.Battery performance is tested on Land CT2001A type battery test systems, charging/discharging voltage scope is
0.01-3V, measures the material in charge-discharge velocity 0.1Ag-1Under conditions of reversible capacity reach 565.1mAh g-1。
Embodiment 6
At room temperature, 160g saturated aqueous sodium chlorides are added dropwise in 800g absolute ethyl alcohols, suction filtration and by filter cake 80
DEG C dry 3h and sodium chloride template is obtained；2g coal tar pitch resins are dissolved in 50g N-methyl pyrrolidones, 3g bis- is added thereto to
Stannic chloride, 1g pore creating material polymethyl methacrylates, add 10g sodium chloride templates after being completely dissolved, stirring adds in 200 DEG C of oil baths
Heat is evaporated N-methyl pyrrolidones；The mixture carbonization that will be obtained, 800 are warming up in tube furnace under nitrogen protection with 5 DEG C/min
DEG C and constant temperature 1h, taken out after cooling, sodium chloride template is washed with deionized, dry 10h at 80 DEG C, the drip of target material coal is obtained
Blue or green resin base amorphous carbon coats tin particles nanometer sheet.Coal tar pitch resin base amorphous carbon is coated into tin particles nanometer sheet and acetylene
Black, PVDF (polyvinylidene fluoride) is according to 7:2:1 mass ratio prepares negative material, and collector is Copper Foil, is assembled in glove box
Sodium-ion battery.Battery performance is tested on Land CT2001A type battery test systems, charging/discharging voltage scope is
0.01-3V, measures the material in charge-discharge velocity 0.1Ag-1Under conditions of reversible capacity reach 592.3mAh g-1。
Comparative example 1
At room temperature, 120g saturated aqueous sodium chlorides are added dropwise in 500g absolute ethyl alcohols, suction filtration and by filter cake 90
DEG C dry 2h and sodium chloride template is obtained；2g coal tar pitch resins are dissolved in 60g N-methyl pyrrolidones, 1g are added thereto to and are made
Hole agent polymethyl methacrylate, adds 20g sodium chloride templates after being completely dissolved, agitating heating is evaporated n-formyl sarcolysine in 200 DEG C of oil baths
Base pyrrolidones；The mixture carbonization that will be obtained, 700 DEG C and constant temperature 2h are warming up in tube furnace under nitrogen protection with 5 DEG C/min,
After cooling take out, sodium chloride template is washed with deionized, dry 5h at 100 DEG C, be obtained composite, then by composite with
Acetylene black, PVDF (polyvinylidene fluoride) are according to 7:2:1 mass ratio prepares negative material, and collector is Copper Foil, in glove box
Assembling sodium-ion battery.Battery performance, charging/discharging voltage model are tested on Land CT2001A type battery test systems
It is 0.01-3V to enclose, and measures the material in charge-discharge velocity 0.1Ag-1Under conditions of reversible capacity reach 283.5mAh g-1。
Comparative example 2
At room temperature, 120g saturated aqueous sodium chlorides are added dropwise in 500g absolute ethyl alcohols, suction filtration and by filter cake 90
DEG C dry 2h and sodium chloride template is obtained；2g coal tar pitch resins are dissolved in 60g N-methyl pyrrolidones, 3g bis- is added thereto to
Stannic chloride, adds 20g sodium chloride templates after being completely dissolved, agitating heating is evaporated N-methyl pyrrolidones in 205 DEG C of oil baths；Will
The mixture carbonization arrived, 700 DEG C and constant temperature 2h are warming up in tube furnace under nitrogen protection with 5 DEG C/min, are taken out after cooling, are spent
Ion water washing sodium chloride template, 5h is dried at 100 DEG C, and composite is obtained, then composite and acetylene black, PVDF is (poly-
Vinylidene fluoride) according to 7:2:1 mass ratio prepares negative material, and collector is Copper Foil, and sodium-ion battery is assembled in glove box.
Battery performance is tested on Land CT2001A type battery test systems, charging/discharging voltage scope is 0.01-3V, is measured
The material is in charge-discharge velocity 0.1A g-1Under conditions of reversible capacity reach 439.8mAh g-1。
From comparative example 1 (being added without stannous chloride), comparative example 2 (being added without pore creating material polymethyl methacrylate) is obtained
Composite finds out compared with embodiment 1 to 6, and battery electrochemical is tested on Land CT2001A type battery test systems
Can, charging/discharging voltage scope is 0.01-3V, measures the material in charge-discharge velocity 0.1A g-1Under conditions of reversible capacity it is obvious
Ground reduces.
Claims (2)
1. a kind of sodium-ion battery negative pole coats the preparation method of tin particles nanometer sheet with coal tar pitch resin base amorphous carbon, and it is special
Levy is to comprise the following steps：
Step 1, at room temperature, saturated aqueous sodium chloride is added dropwise in absolute ethyl alcohol, and dry cake is obtained chlorination after suction filtration
Sodium template, the saturated aqueous sodium chloride is 1 with absolute ethyl alcohol mass ratio:3-20, filtration cakes torrefaction temperature control is in 70-100
DEG C, drying time is controlled in 1-5h；
Step 2, coal tar pitch resin is dissolved in N-methyl pyrrolidones, adds stannous chloride and pore creating material polymethylacrylic acid
Methyl esters, is added thereto to as sodium chloride template obtained in step 1 after being completely dissolved, the lower solvent evaporated of stirring, the solvent distillation
At 150-210 DEG C, coal tar pitch resin is 1 with the mass ratio of N-methyl pyrrolidones to temperature control:10-50, coal tar pitch resin with
The mass ratio of pore creating material polymethyl methacrylate is 1:0.1-2, coal tar pitch resin is 1 with the mass ratio of stannous chloride:0.5-
5, coal tar pitch resin is 1 with the mass ratio of sodium chloride template:1-20；
Step 3, the mixture for obtaining step 2 carry out carbonization treatment under inert gas shielding, and temperature is with 2-10 DEG C/min liters
Warm speed rises to 600-900 DEG C, and constant temperature 1-3h, the inert gas is selected from the one kind in nitrogen or argon gas；
Sample is cooled to room temperature taking-up after step 4, the carbonization treatment for obtaining step 3, adopts and sodium chloride mould is washed with deionized
Plate is simultaneously dried, and at 80-120 DEG C, time control obtains target material coal tar pitch resin base without fixed to temperature control in 4-12h
Shape carbon coating tin particles nanometer sheet.
2. preparation method according to claim 1, the coal tar pitch resin base amorphous carbon cladding tin particles nanometer sheet of preparation exists
Application in sodium-ion battery aspect.
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| CN108163832A (en) * | 2017-12-08 | 2018-06-15 | 大连理工大学 | A kind of preparation method and applications of pitch base carbon nanometer sheet |
| CN108807892A (en) * | 2018-06-06 | 2018-11-13 | 郑州中科新兴产业技术研究院 | A kind of preparation method of asphaltic base silicon-carbon nanometer sheet lithium cell negative pole material |
| CN110386626A (en) * | 2018-04-16 | 2019-10-29 | 中国科学技术大学 | A kind of cobalt protoxide thin slice, preparation method and its decompose the application in water entirely in visible light catalytic |
| CN110518228A (en) * | 2019-09-17 | 2019-11-29 | 安徽大学 | It is a kind of embed inorganic nano-particle three-dimensional grapheme carbon nano-composite material and its application |
| CN114715936A (en) * | 2022-04-18 | 2022-07-08 | 鸡西市唯大新材料科技有限公司 | Negative electrode NaSbS of lithium or sodium ion battery2Preparation method of @ C composite material |
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