CN106099109B - A kind of preparation method and applications of asphaltic base hard charcoal nanometer sheet - Google Patents
A kind of preparation method and applications of asphaltic base hard charcoal nanometer sheet Download PDFInfo
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- CN106099109B CN106099109B CN201610459292.4A CN201610459292A CN106099109B CN 106099109 B CN106099109 B CN 106099109B CN 201610459292 A CN201610459292 A CN 201610459292A CN 106099109 B CN106099109 B CN 106099109B
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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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- 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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- 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 preparation technical fields, a kind of preparation method and applications of asphaltic base hard charcoal nanometer sheet, this method includes following procedure: using medium temperature coal pitch as raw material, using terephthalyl alcohol as crosslinking agent, p-methyl benzenesulfonic acid is catalyst in 100~170 DEG C of progress cross-linking reactions, it prepares hard charcoal forerunner modified asphalt: again by sodium chloride and ethyl alcohol mixing and ball milling, obtaining a micron grade sodium chloride template after dry；Finally modified pitch is dissolved in after being mixed according to a certain percentage after N-methyl pyrrolidones with sodium chloride template, washing obtains asphaltic base hard charcoal nanometer sheet after 650~850 DEG C of charings, is applied to sodium-ion battery cathode.Provided by the present invention preparation method is simple, and the preparation process of charcoal nanometer sheet does not need pickling and removes removing template, environmentally protective；Sodium chloride template and N-methyl pyrrolidinone solvent can be recycled, lower production costs；Asphaltic base hard charcoal nanometer sheet prepared by the present invention shows higher reversible storage sodium capacity, 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 preparation method and applications of asphaltic base hard charcoal nanometer sheet, belong to carbon material technology of preparing neck
Domain.
Background technique
Lithium ion battery due to its operating voltage is high, capacity is big, have extended cycle life the advantages that, become mancarried electronic aid,
The first choice of the small-scale energy storage system such as electric car.But lithium resource reserves are few in the earth's crust and are unevenly distributed, and are unable to satisfy not
Carry out the great demand of energy storage system.Sodium and lithium belong to same main group, and chemical property is close, and reserves very abundant, sodium ion electricity
The production cost in pond will be far below lithium ion battery, and exploitation sodium-ion battery is applied to big rule as the substitute of lithium ion battery
Mould energy storage system reasonable.
Since the radius of sodium ion is larger, charcoal base negative electrode material used in sodium-ion battery research is mainly carbon-coating spacing
Larger, the lower hard carbon material of degree of graphitization.Hard charcoal presoma is mainly biomass, high molecular polymer, resin etc., wherein
Asphaltic base hard carbon cathode material have high Carbon yield, suitable carbon-coating spacing and excellent electric conductivity, be expected to commercialization sodium from
It is used widely in sub- battery.
The microscopic appearance and structure of hard charcoal negative electrode material will affect material and electrolyte contacts area, sodium ion diffusion path
Deng finally influencing material electrochemical performance.Patent CN105098186A hard carbon presoma is mixed with soft carbon presoma after through handing over
After the processing such as connection, solidification, charing, unformed Carbon Materials are obtained applied to sodium-ion battery, but the hard charcoal of this method preparation is negative
Pole material is micron particles, and electrolyte and negative electrode material contact are not enough, and affects the chemical property of negative electrode material.It will
Hard carbon material nanosizing is to promote the effective means of material electrochemical performance, and wherein charcoal nanometer sheet has and electrolyte contacts area
Greatly, the advantages that sodium ion transmission path is short obtains researcher's extensive concern.Traditional charcoal nanometer sheet using metal oxide as template,
It needs pickling to remove removing template, preparation process complexity and environment easy to pollute after charing, constrains its widespread adoption.
Summary of the invention
In order to solve above-mentioned problems of the prior art, it is an object of the present invention to provide a kind of asphaltic base hard charcoal nanometer sheets
Preparation method and applications.This method preparation process is simple, and raw material sources are abundant, prepared hard charcoal nanometer sheet be used as sodium from
Sub- battery cathode has many advantages, such as specific capacity height, and good rate capability and cycle performance are excellent.
In order to achieve the above-mentioned object of the invention, it solves present in prior art to topic, the technical solution adopted by the present invention is that:
A kind of preparation method of asphaltic base hard charcoal nanometer sheet, comprising the following steps:
Step 1, using medium temperature coal pitch as raw material, terephthalyl alcohol be crosslinking agent, p-methyl benzenesulfonic acid is that catalyst is added to
In reactor, modified pitch is made by catalytic polymerization, the control of catalytic polymerization temperature at 100~170 DEG C, control by the reaction time
System is 1:0.2-0.5:0.03-0.1 in 1~10h, the mass ratio of the medium temperature coal pitch, terephthalyl alcohol and p-methyl benzenesulfonic acid；
Sodium chloride and ethyl alcohol are added in ball grinder by step 2, and mixing and ball milling is evaporated the obtained sodium chloride template of ethyl alcohol, ball
Time consuming control is controlled in 1~5h, drum's speed of rotation in 100~500rpm；The sodium chloride and ethyl alcohol mass ratio are 1:0.25-
1；
Modified pitch made from step 1 is dissolved in N-methyl pyrrolidones (NMP) solvent by step 3, is added thereto by step
Sodium chloride template made from rapid 2 stirs lower solvent evaporated, and said mixture is carried out at charing under inert gas protection
Reason, carbonization temperature control is at 650~850 DEG C, and carbonization time is controlled in 1~3h, and the inert gas is in nitrogen or argon gas
One kind, the mass ratio of modified pitch and N-methyl pyrrolidones is 1:2-20, the mass ratio of modified pitch and sodium chloride template
For 1:3-20；
Sample after charing process made from step 3 is cooled to room temperature by step 4, adopts and sodium chloride mould is washed with deionized
Plate is dried to obtain target material asphaltic base hard charcoal nanometer sheet.
A kind of preparation method of asphaltic base hard charcoal nanometer sheet, asphaltic base hard charcoal nanometer sheet obtained is in sodium-ion battery
In application.
The medicine have the advantages that compared with the prior art, the invention has the advantages that, (1) is provided by the present invention
Preparation method is simple, and the preparation process of charcoal nanometer sheet does not need pickling and removes removing template, environmentally protective；(2) sodium chloride template
It can be recycled with N-methyl pyrrolidones (NMP) solvent, lower production costs；(3) it prepares raw material and template price is low
It is honest and clean, abundance, it is easy to accomplish large-scale production；(4) asphaltic base hard charcoal nanometer sheet prepared by the present invention is as sodium-ion battery
Negative electrode material shows higher reversible storage sodium capacity, preferable high rate performance and excellent cycle performance.
Detailed description of the invention
Fig. 1 is the stereoscan photograph figure of asphaltic base hard charcoal nanometer sheet prepared by the embodiment of the present invention 2.
Fig. 2 is asphaltic base hard charcoal nanometer sheet transmission electron microscope photo figure prepared by the embodiment of the present invention 2.
Fig. 3 is the X-ray diffractogram spectrogram of asphaltic base hard charcoal nanometer sheet prepared by the embodiment of the present invention 2.
Fig. 4 is the asphaltic base hard charcoal nanometer sheet for preparing of the embodiment of the present invention 2 different current densities in sodium ion half-cell
Under charge-discharge performance curve graph.
Specific embodiment
Below with reference to embodiment and comparative example, the invention will be further described.
Embodiment 1
100g medium temperature coal pitch is added in round-bottomed flask step 1, and after being heated to melting in oil bath, 30g is added to benzene two
5g p-methyl benzenesulfonic acid is added after mixing, continues after being heated to 160 DEG C of reaction 3h for methanol, and system is viscous liquid, cooling
It is taken out after to room temperature.
20g sodium chloride is put into ball grinder by step 2, and appropriate zirconia ball is added thereto, and 12g ethyl alcohol is added,
Ball milling 4h under 400rpm revolving speed, is evaporated ethyl alcohol after mixture is taken out, and sample is separated with zirconia ball, obtains micron order chlorination
Sodium template.
Step 3, the modified pitch powder 2g for preparing step 1, are dissolved in 30g NMP, and 20g step 2 is added thereto
Sodium chloride template obtained, heating is evaporated NMP in 200 DEG C of oil baths.Obtained mixture is carbonized, in tube furnace under nitrogen protection
650 DEG C are warming up to 5 DEG C/min and maintains 2h, is taken out after cooling, and with deionized water dissolving sodium chloride, by gained hard charcoal nanometer
Piece is dry.XRD characterization discovery, 002 interlamellar spacing of hard charcoal nanometer sheet is up to 0.388nm.
Hard charcoal nanometer sheet and acetylene black, PVDF (polyvinylidene fluoride) are prepared cathode according to 7:2:1 mass ratio by step 4
Material, collector are copper foil, and sodium-ion battery is assembled in glove box.It is tested on Land CT2001A type battery test system
Battery performance, charging/discharging voltage range are 0.01-3V, measure the asphaltic base hard charcoal nanometer sheet in charge-discharge velocity 0.1A
g-1Under conditions of for the first time reversible capacity reach 271.3mAh g-1。
Embodiment 2
100g medium temperature coal pitch is added in round-bottomed flask step 1, and after being heated to melting in oil bath, 30g is added to benzene two
7g p-methyl benzenesulfonic acid is added after mixing, continues after being heated to 160 DEG C of reaction 3h for methanol, and system is viscous liquid, cooling
It is taken out after to room temperature.
20g sodium chloride is put into ball grinder by step 2, and appropriate zirconia ball is added thereto, and 10g ethyl alcohol is added,
Ball milling 4h under 400rpm revolving speed, is evaporated ethyl alcohol after mixture is taken out, and sample is separated with zirconia ball, obtains micron order chlorination
Sodium template.
Step 3, the modified pitch powder 2g for preparing step 1, are dissolved in 40g NMP, and 20g step 2 is added thereto
Sodium chloride template obtained is evaporated NMP in 200 DEG C of oil baths.Obtained mixture is carbonized, with 5 under nitrogen protection in tube furnace
DEG C/min is warming up to 750 DEG C and maintains 2h, it is taken out after cooling, and with deionized water dissolving sodium chloride, by gained hard charcoal nanometer sheet
It is dry.XRD characterization discovery, 002 interlamellar spacing of hard charcoal nanometer sheet is up to 0.381nm.
Hard charcoal nanometer sheet and acetylene black, PVDF (polyvinylidene fluoride) are prepared cathode according to 7:2:1 mass ratio by step 4
Material, collector are copper foil, and sodium-ion battery is assembled in glove box.It is tested on Land CT2001A type battery test system
Battery performance, charging/discharging voltage range are 0.01-3V, measure the asphaltic base hard charcoal nanometer sheet in charge-discharge velocity 0.1A
g-1Under conditions of for the first time reversible capacity reach 270.4mAh g-1。
Embodiment 3
100g medium temperature coal pitch is added in round-bottomed flask step 1, and after being heated to melting in oil bath, 30g is added to benzene two
7g p-methyl benzenesulfonic acid is added after mixing, continues after being heated to 170 DEG C of reaction 2h for methanol, and system is viscous liquid, cooling
It is taken out after to room temperature.
20g sodium chloride is put into ball grinder by step 2, and appropriate zirconia ball is added thereto, and 8g ethyl alcohol is added,
Ball milling 5h under 300rpm revolving speed, is evaporated ethyl alcohol after mixture is taken out, and sample is separated with zirconia ball, obtains micron order chlorination
Sodium template.
Step 3, the modified pitch powder 2g for preparing step 1, are dissolved in 35g NMP, and 40g step 2 is added thereto
Sodium chloride template obtained is evaporated NMP in 200 DEG C of oil baths.Obtained mixture is carbonized, with 5 under nitrogen protection in tube furnace
DEG C/min is warming up to 850 DEG C and maintains 2h, it is taken out after cooling, and with deionized water dissolving sodium chloride, by gained hard charcoal nanometer sheet
It is dry.XRD characterization discovery, 002 interlamellar spacing of hard charcoal nanometer sheet is up to 0.356nm.
Hard charcoal nanometer sheet and acetylene black, PVDF (polyvinylidene fluoride) are prepared cathode according to 7:2:1 mass ratio by step 4
Material, collector are copper foil, and sodium-ion battery is assembled in glove box.It is tested on Land CT2001A type battery test system
Battery performance, charging/discharging voltage range are 0.01-3V, measure the asphaltic base hard charcoal nanometer sheet in charge-discharge velocity 0.1A
g-1Under conditions of for the first time reversible capacity reach 218.7mAh g-1。
Embodiment 4
100g medium temperature coal pitch is added in round-bottomed flask step 1, and after being heated to melting in oil bath, 35g is added to benzene two
5g p-methyl benzenesulfonic acid is added after mixing, continues after being heated to 160 DEG C of reaction 3h for methanol, and system is viscous liquid, cooling
It is taken out after to room temperature.
20g sodium chloride is put into ball grinder by step 2, and appropriate zirconia ball is added thereto, and 10g ethyl alcohol is added,
Ball milling 2h under 500rpm revolving speed, is evaporated ethyl alcohol after mixture is taken out, and sample is separated with zirconia ball, obtains micron order chlorination
Sodium template.
Step 3, the modified pitch powder 2g for preparing step 1, are dissolved in 40g NMP, and 20g step 2 is added thereto
Sodium chloride template obtained is evaporated NMP in 200 DEG C of oil baths.Obtained mixture is carbonized, with 5 under nitrogen protection in tube furnace
DEG C/min is warming up to 850 DEG C and maintains 2h, it is taken out after cooling, and with deionized water dissolving sodium chloride, by gained hard charcoal nanometer sheet
It is dry.XRD characterization discovery, 002 interlamellar spacing of hard charcoal nanometer sheet is up to 0.357nm.
Hard charcoal nanometer sheet and acetylene black, PVDF (polyvinylidene fluoride) are prepared cathode according to 7:2:1 mass ratio by step 4
Material, collector are copper foil, and sodium-ion battery is assembled in glove box.It is tested on Land CT2001A type battery test system
Battery performance, charging/discharging voltage range are 0.01-3V, measure the asphaltic base hard charcoal nanometer sheet in charge-discharge velocity 0.1A
g-1Under conditions of for the first time reversible capacity reach 220.1mAh g-1。
Embodiment 5
100g medium temperature coal pitch is added in round-bottomed flask step 1, and after being heated to melting in oil bath, 30g is added to benzene two
10g p-methyl benzenesulfonic acid is added after mixing, continues after being heated to 150 DEG C of reaction 3h, system is viscous liquid, cold for methanol
But to taking out after room temperature.
20g sodium chloride is put into ball grinder by step 2, and appropriate zirconia ball is added thereto, and 15g ethyl alcohol is added,
Ball milling 3h under 500rpm revolving speed, is evaporated ethyl alcohol after mixture is taken out, and sample is separated with zirconia ball, obtains micron order chlorination
Sodium template.
Step 3, the modified pitch powder 2g for preparing step 1, are dissolved in 30g NMP, and 25g step 2 is added thereto
Sodium chloride template obtained, heating is evaporated NMP in 200 DEG C of oil baths.Obtained mixture is carbonized, in tube furnace under argon gas protection
700 DEG C are warming up to 5 DEG C/min and maintains 1h, is taken out after cooling, and with deionized water dissolving sodium chloride, by gained hard charcoal nanometer
Piece is dry.XRD characterization discovery, 002 interlamellar spacing of hard charcoal nanometer sheet is up to 0.383nm.
Hard charcoal nanometer sheet and acetylene black, PVDF (polyvinylidene fluoride) are prepared cathode according to 7:2:1 mass ratio by step 4
Material, collector are copper foil, and sodium-ion battery is assembled in glove box.It is tested on Land CT2001A type battery test system
Battery performance, charging/discharging voltage range are 0.01-3V, measure the asphaltic base hard charcoal nanometer sheet in charge-discharge velocity 0.1A
g-1Under conditions of for the first time reversible capacity reach 268.9mAh g-1。
Embodiment 6
100g medium temperature coal pitch is added in round-bottomed flask step 1, and after being heated to melting in oil bath, 40g is added to benzene two
7g p-methyl benzenesulfonic acid is added after mixing, continues after being heated to 140 DEG C of reaction 3h for methanol, and system is viscous liquid, cooling
It is taken out after to room temperature.
20g sodium chloride is put into ball grinder by step 2, and appropriate zirconia ball is added thereto, and 10g ethyl alcohol is added,
Ball milling 4h under 400rpm revolving speed, is evaporated ethyl alcohol after mixture is taken out, and sample is separated with zirconia ball, obtains micron order chlorination
Sodium template.
Step 3, the modified pitch powder 2g for preparing step 1, are dissolved in 40g NMP, and 30g step 2 is added thereto
Sodium chloride template obtained, heating is evaporated NMP in 200 DEG C of oil baths.Obtained mixture is carbonized, in tube furnace under argon gas protection
800 DEG C are warming up to 5 DEG C/min and maintains 2h, is taken out after cooling, and with deionized water dissolving sodium chloride, by gained hard charcoal nanometer
Piece is dry.XRD characterization discovery, 002 interlamellar spacing of hard charcoal nanometer sheet is up to 0.372nm.
Hard charcoal nanometer sheet and acetylene black, PVDF (polyvinylidene fluoride) are prepared cathode according to 7:2:1 mass ratio by step 4
Material, collector are copper foil, and sodium-ion battery is assembled in glove box.It is tested on Land CT2001A type battery test system
Battery performance, charging/discharging voltage range are 0.01-3V, measure the asphaltic base hard charcoal nanometer sheet in charge-discharge velocity 0.1A
g-1Under conditions of for the first time reversible capacity reach 262.8mAh g-1。
Comparative example 1
20g sodium chloride is put into ball grinder by step 1, and appropriate zirconia ball is added thereto, and 10g ethyl alcohol is added,
Ball milling 4h under 400rpm revolving speed, is evaporated ethyl alcohol after mixture is taken out, and sample is separated with zirconia ball, obtains micron order chlorination
Sodium template.
Step 2, by mid temperature pitch powder 2g, be dissolved in 40g NMP, thereto be added 20g step 1 made from sodium chloride
Template is evaporated NMP in 200 DEG C of oil baths.Obtained mixture is carbonized, with 5 DEG C/min liter under inert gas shielding in tube furnace
Temperature is to 750 DEG C and maintains 2h, takes out after cooling, and uses deionized water dissolving sodium chloride, and gained hard charcoal nanometer sheet is dried.XRD
Characterization discovery, 002 interlamellar spacing of hard charcoal nanometer sheet are 0.342nm.
Hard charcoal nanometer sheet and acetylene black, PVDF (polyvinylidene fluoride) are prepared cathode according to 7:2:1 mass ratio by step 3
Material, collector are copper foil, and sodium-ion battery is assembled in glove box.It is tested on Land CT2001A type battery test system
Battery performance, charging/discharging voltage range are 0.01-3V, measure the asphaltic base hard charcoal nanometer sheet in charge-discharge velocity 0.1A
g-1Under conditions of for the first time reversible capacity be 168.3mAh g-1。
Comparative example 2
100g medium temperature coal pitch is added in round-bottomed flask step 1, and after being heated to melting in oil bath, 30g is added to benzene two
7g p-methyl benzenesulfonic acid is added after mixing, continues after being heated to 160 DEG C of reaction 3h for methanol, and system is viscous liquid, cooling
It is taken out after to room temperature.
Modified pitch powder 2g prepared by step 1 is put into tube furnace under inert gas shielding with 5 DEG C/min by step 2
It is warming up to 750 DEG C and maintains 2h, taken out after cooling, and use deionized water dissolving sodium chloride, gained hard charcoal nanometer sheet is dried.
XRD characterization discovery, 002 interlamellar spacing of hard charcoal nanometer sheet is up to 0.374nm.
Hard charcoal nanometer sheet and acetylene black, PVDF (polyvinylidene fluoride) are prepared cathode according to 7:2:1 mass ratio by step 3
Material, collector are copper foil, and sodium-ion battery is assembled in glove box.It is tested on Land CT2001A type battery test system
Battery performance, charging/discharging voltage range are 0.01-3V, measure the asphaltic base hard charcoal nanometer sheet in charge-discharge velocity 0.1A
g-1Under conditions of for the first time reversible capacity be 209.6mAh g-1。
Claims (1)
1. a kind of preparation method for the asphaltic base hard charcoal nanometer sheet in sodium-ion battery, it is characterised in that including following step
It is rapid:
Step 1, using medium temperature coal pitch as raw material, terephthalyl alcohol be crosslinking agent, p-methyl benzenesulfonic acid is that catalyst is added to reaction
In device, modified pitch is made by catalytic polymerization, catalytic polymerization temperature is controlled 100 ~ 170oC, reaction time control exist
1 ~ 10 h, the mass ratio of the medium temperature coal pitch, terephthalyl alcohol and p-methyl benzenesulfonic acid are 1:0.2-0.5:0.03-0.1；
Sodium chloride and ethyl alcohol are added in ball grinder by step 2, and mixing and ball milling is evaporated ethyl alcohol sodium chloride template is made, when ball milling
Between control in 1 ~ 5 h, drum's speed of rotation is controlled in 100 ~ 500 rpm；The sodium chloride and ethyl alcohol mass ratio are 1:0.25-1；
Modified pitch made from step 1 is dissolved in N-methyl pyrrolidinone solvent by step 3, is added as made from step 2 thereto
Sodium chloride template stirs lower solvent evaporated, and said mixture is carried out charing process under inert gas protection, carbonization temperature
Control is 650 ~ 850oC, in 1 ~ 3 h, the inert gas is selected from one of nitrogen or argon gas, modified for carbonization time control
The mass ratio of pitch and N-methyl pyrrolidones is 1:2-20, and the mass ratio of modified pitch and sodium chloride template is 1:3-20；
Sample after charing process made from step 3 is cooled to room temperature by step 4, adopts and sodium chloride template is washed with deionized, and is done
It is dry to obtain target material asphaltic base hard charcoal nanometer sheet.
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| CN106876702B (en) * | 2017-02-08 | 2019-10-22 | 大连理工大学 | A kind of preparation method and application of sodium-ion battery cathode |
| 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 |
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| CN116613300B (en) * | 2023-07-18 | 2023-09-22 | 成都锂能科技有限公司 | Coal-based carbonized sodium battery anode material, preparation method thereof and sodium ion battery comprising coal-based carbonized sodium battery anode material |
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