CN116969438A - Composite resin-based hard carbon material, sodium ion battery and preparation method of sodium ion battery - Google Patents
Composite resin-based hard carbon material, sodium ion battery and preparation method of sodium ion battery Download PDFInfo
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- CN116969438A CN116969438A CN202310538839.XA CN202310538839A CN116969438A CN 116969438 A CN116969438 A CN 116969438A CN 202310538839 A CN202310538839 A CN 202310538839A CN 116969438 A CN116969438 A CN 116969438A
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- 229910021385 hard carbon Inorganic materials 0.000 title claims abstract description 67
- 239000003575 carbonaceous material Substances 0.000 title claims abstract description 64
- 239000000805 composite resin Substances 0.000 title claims abstract description 41
- FKNQFGJONOIPTF-UHFFFAOYSA-N Sodium cation Chemical compound [Na+] FKNQFGJONOIPTF-UHFFFAOYSA-N 0.000 title claims abstract description 23
- 229910001415 sodium ion Inorganic materials 0.000 title claims abstract description 23
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- 229920001568 phenolic resin Polymers 0.000 claims abstract description 42
- 239000005011 phenolic resin Substances 0.000 claims abstract description 29
- 229920005989 resin Polymers 0.000 claims abstract description 23
- 239000011347 resin Substances 0.000 claims abstract description 23
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000003822 epoxy resin Substances 0.000 claims abstract description 18
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 18
- SLGWESQGEUXWJQ-UHFFFAOYSA-N formaldehyde;phenol Chemical compound O=C.OC1=CC=CC=C1 SLGWESQGEUXWJQ-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000000203 mixture Substances 0.000 claims abstract description 16
- 238000004321 preservation Methods 0.000 claims abstract description 15
- 125000003118 aryl group Chemical group 0.000 claims abstract description 11
- 150000001875 compounds Chemical class 0.000 claims abstract description 10
- 239000002243 precursor Substances 0.000 claims abstract description 4
- 239000012298 atmosphere Substances 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 26
- 239000000843 powder Substances 0.000 claims description 15
- 238000002156 mixing Methods 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 5
- 239000011267 electrode slurry Substances 0.000 claims description 4
- 238000007711 solidification Methods 0.000 claims description 3
- 230000008023 solidification Effects 0.000 claims description 3
- 239000002904 solvent Substances 0.000 claims description 3
- 239000011230 binding agent Substances 0.000 claims description 2
- 239000006258 conductive agent Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims 3
- JRQJLSWAMYZFGP-UHFFFAOYSA-N 1,1'-biphenyl;phenol Chemical compound OC1=CC=CC=C1.C1=CC=CC=C1C1=CC=CC=C1 JRQJLSWAMYZFGP-UHFFFAOYSA-N 0.000 claims 1
- PBEHQFUSQJKBAS-UHFFFAOYSA-N 4-[2-(4-hydroxyphenyl)propan-2-yl]phenol;phenol Chemical compound OC1=CC=CC=C1.C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 PBEHQFUSQJKBAS-UHFFFAOYSA-N 0.000 claims 1
- 125000003710 aryl alkyl group Chemical group 0.000 claims 1
- 239000003795 chemical substances by application Substances 0.000 abstract description 4
- 239000007773 negative electrode material Substances 0.000 abstract description 2
- 238000001723 curing Methods 0.000 description 18
- 230000000052 comparative effect Effects 0.000 description 14
- ZUOUZKKEUPVFJK-UHFFFAOYSA-N diphenyl Chemical compound C1=CC=CC=C1C1=CC=CC=C1 ZUOUZKKEUPVFJK-UHFFFAOYSA-N 0.000 description 10
- 239000002245 particle Substances 0.000 description 10
- 238000012360 testing method Methods 0.000 description 10
- 239000004305 biphenyl Substances 0.000 description 5
- 235000010290 biphenyl Nutrition 0.000 description 5
- 230000001788 irregular Effects 0.000 description 5
- 239000011148 porous material Substances 0.000 description 5
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- 238000011160 research Methods 0.000 description 4
- 230000002441 reversible effect Effects 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- -1 aralkyl phenolic resin Chemical compound 0.000 description 3
- RAXXELZNTBOGNW-UHFFFAOYSA-N imidazole Natural products C1=CNC=N1 RAXXELZNTBOGNW-UHFFFAOYSA-N 0.000 description 3
- 238000011056 performance test Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- XTHFKEDIFFGKHM-UHFFFAOYSA-N Dimethoxyethane Chemical compound COCCOC XTHFKEDIFFGKHM-UHFFFAOYSA-N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 125000001931 aliphatic group Chemical group 0.000 description 2
- 239000012300 argon atmosphere Substances 0.000 description 2
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- IXPNQXFRVYWDDI-UHFFFAOYSA-N 1-methyl-2,4-dioxo-1,3-diazinane-5-carboximidamide Chemical compound CN1CC(C(N)=N)C(=O)NC1=O IXPNQXFRVYWDDI-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 239000010405 anode material Substances 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 238000010000 carbonizing Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000013007 heat curing Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011268 mixed slurry Substances 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000001878 scanning electron micrograph Methods 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 235000010413 sodium alginate Nutrition 0.000 description 1
- 229940005550 sodium alginate Drugs 0.000 description 1
- 239000000661 sodium alginate Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000001291 vacuum drying Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Carbon And Carbon Compounds (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The application provides a composite resin-based hard carbon material, a sodium ion battery and a preparation method thereof. The preparation method of the composite resin-based hard carbon material comprises the following steps: preparing a resin mixture containing a phenol formaldehyde type epoxy resin precursor and an aromatic phenolic resin curing agent, carrying out heat preservation and curing at 80-200 ℃, crushing a cured compound, and carrying out high-temperature treatment under the protection of inert atmosphere to obtain the epoxy resin. The sodium ion battery prepared by adopting the composite resin-based hard carbon material as a negative electrode material has excellent first coulombic efficiency, charge-discharge capacity and cycle stability.
Description
Technical Field
The application relates to the technical field of batteries, in particular to a composite resin-based hard carbon material, a sodium ion battery and a preparation method thereof.
Background
In recent years, hard carbon materials have been widely studied. The preparation of the hard carbon anode material by adopting part of resin has a certain research result, but the overall performances such as charge and discharge performance, cycle stability and the like are still not high when the traditional resin-based hard carbon material is applied to the preparation of sodium ion batteries.
Disclosure of Invention
Based on the above, it is necessary to provide a composite resin-based hard carbon material, a sodium ion battery and a method for preparing the same, thereby improving charge and discharge performance and cycle stability of the sodium ion battery.
The application adopts the following technical scheme:
the application provides a preparation method of a composite resin-based hard carbon material, which comprises the following steps: taking phenol formaldehyde type epoxy resin as a precursor, and uniformly mixing the phenol formaldehyde type epoxy resin and an aromatic phenolic resin curing agent according to the mass ratio of (10-1): 1 to obtain a resin mixture; the resin mixture is subjected to heat preservation and solidification at the temperature of 80-200 ℃ to obtain a solidified compound; crushing the solidified compound to obtain solidified powder; and under the protection of inert atmosphere, heating the solidified powder to 1000-1800 ℃ for high-temperature treatment to obtain the composite resin-based hard carbon material.
In some of these embodiments, the aromatic phenolic resin is preferably at least one selected from the group consisting of an aralkyl phenolic resin, a biphenyl phenolic resin, and a bisphenol a phenolic resin.
In some of these embodiments, the mass ratio of phenol formaldehyde type epoxy resin to aromatic phenolic resin is preferably (5-1): 1.
In some embodiments, the heat-preserving curing time is 1-16 hours.
In some embodiments, the temperature rise rate of the high temperature treatment is 1-15 ℃/min, and the duration of the high temperature treatment is 1-10 h.
In some of these embodiments, the temperature of the high temperature treatment is preferably 1400-1800 ℃.
The composite resin-based hard carbon material prepared by the method is prepared.
The application also provides a negative electrode plate which is prepared from the negative electrode slurry containing the composite resin-based hard carbon material. Preferably, the composite resin-based hard carbon material is prepared from a negative electrode slurry containing a conductive agent, a binder, a solvent and the composite resin-based hard carbon material.
The application also provides a sodium ion battery which comprises the negative electrode plate. Preferably, the sodium ion battery further comprises a positive electrode plate, a diaphragm and sodium ion electrolyte.
Compared with the prior art, the application has the core advantages that:
according to the application, a large number of researches and researches find that the composite resin-based hard carbon material prepared by carrying out a curing reaction and high-temperature treatment on a resin mixture of phenol formaldehyde type epoxy resin (serving as a precursor) and aromatic phenolic resin (serving as a curing agent) can be used for improving comprehensive performances such as initial coulombic efficiency, cycle stability, charge and discharge capacity and the like when being applied to a sodium ion battery system.
Drawings
Fig. 1 is an SEM image of the composite resin-based hard carbon material of example 4.
Detailed Description
The technical concept of the application is to provide a composite resin-based hard carbon material, a sodium ion battery using the composite resin-based hard carbon material and a preparation method thereof, and the composite resin-based hard carbon material can improve the comprehensive properties of charge and discharge performance, cycle stability and the like of the sodium ion battery.
The present application will be described in further detail with reference to specific examples so as to more clearly understand the present application by those skilled in the art. The following examples are given for illustration of the application only and are not intended to limit the scope of the application. All other embodiments obtained by those skilled in the art without creative efforts are within the protection scope of the present application based on the specific embodiments of the present application. In the examples of the present application, all raw material components are commercially available products well known to those skilled in the art unless specified otherwise; in the embodiments of the present application, unless specifically indicated, all technical means used are conventional means well known to those skilled in the art.
It should be noted that, in the present application, the aromatic phenolic resin refers to a phenolic resin with a benzene ring structure, and the phenolic resin contains at least one benzene ring with a domain-separated bond.
Wherein, the structural formula of biphenyl type phenolic resin:
the structural formula of the aralkyl phenolic resin is as follows:
bisphenol a type phenolic resin has the structural formula:
aliphatic phenolic resin has the structural formula:
phenol formaldehyde type epoxy resin has a structural formula:
the source and physical and chemical indexes of the key materials for part of the test are described:
example 1
The embodiment provides a preparation method of a composite resin-based hard carbon material, which comprises the following steps:
s1, uniformly mixing phenol formaldehyde type epoxy resin and biphenyl type phenolic resin according to a mass ratio of 3:1 to obtain a resin mixture.
S2, transferring the resin mixture into an alumina ark, and preserving heat for 8 hours at 80 ℃ for curing to obtain a cured compound.
S3, preparing the solidified compound into powder through a vibration sample grinder to obtain solidified powder.
S4, raising the temperature from room temperature to 1000 ℃ at a speed of 2 ℃/min, carrying out high-temperature treatment on the solidified powder for 2 hours, and cooling to room temperature to obtain the composite resin-based hard carbon material.
Through tests, the composite resin-based hard carbon material prepared by the embodiment is a hard carbon material which macroscopically presents irregular block particles, and has a nano micropore structure in the particles, wherein the average pore diameter of the nano micropore structure is 0.29nm.
Example 2
The present embodiment provides a method for preparing a composite resin-based hard carbon material, which has the same process steps as those of embodiment 1, and differs only in that: the mass ratio in the step S1 is 1:1, the heat preservation and curing temperature and the heat preservation and curing time in the step S2 are respectively 200 ℃ and 1h, and the high-temperature treatment temperature in the step S4 is 1200 ℃.
Through tests, the composite resin-based hard carbon material prepared by the embodiment is a hard carbon material which macroscopically presents irregular block particles, and has a nano micropore structure in the particles, wherein the average pore diameter of the nano micropore structure is 0.57nm.
Example 3
The present embodiment provides a method for preparing a composite resin-based hard carbon material, which has the same process steps as those of embodiment 1, and differs only in that: the mass ratio in the step S1 is 5:1, the heat preservation and curing temperature and the heat preservation and curing time in the step S2 are respectively 100 ℃ and 16 hours, and the high-temperature treatment temperature in the step S4 is 1400 ℃.
Through tests, the composite resin-based hard carbon material prepared by the embodiment is a hard carbon material which macroscopically presents irregular block-shaped particles and has a nano micropore structure inside the particles. Wherein, the average pore diameter of the nano microporous structure is 1.05nm.
Example 4
The present embodiment provides a method for preparing a composite resin-based hard carbon material, which has the same process steps as those of embodiment 1, and differs only in that: the mass ratio in the step S1 is 2:1, the heat preservation and curing temperature and the heat preservation and curing time in the step S2 are 120 ℃ and 10 hours respectively, and the high-temperature treatment temperature in the step S4 is 1600 ℃.
Through tests, the composite resin-based hard carbon material prepared by the embodiment is a hard carbon material which macroscopically presents irregular block particles, and has a nano micropore structure in the particles, wherein the average pore diameter of the nano micropore structure is 1.32nm.
Example 5
The present embodiment provides a method for preparing a composite resin-based hard carbon material, which has the same process steps as those of embodiment 1, and differs only in that: the mass ratio in the step S1 is 4:1, the heat preservation and curing temperature and the heat preservation and curing time in the step S2 are 160 ℃ and 4 hours respectively, and the high-temperature treatment temperature in the step S4 is 1800 ℃.
Through tests, the composite resin-based hard carbon material prepared by the embodiment is a hard carbon material which macroscopically presents irregular block particles, and has a nano micropore structure in the particles, wherein the average pore diameter of the nano micropore structure is 1.58nm.
Example 6
The embodiment provides a preparation method of a composite resin-based hard carbon material, which has the same process steps as those of embodiment 1, and is different in that:
in the step S1, uniformly mixing phenol formaldehyde type epoxy resin and bisphenol A type phenolic resin according to a mass ratio of 1:1 to obtain a resin mixture.
In the step S2, the resin mixture is transferred into an alumina ark, and is subjected to heat preservation for 8 hours at 120 ℃ for curing, so that a cured compound is obtained.
In step S4, the temperature is raised from room temperature to 1600 ℃ at a rate of 2 ℃/min, and the cured powder is subjected to high temperature for 6 hours.
Example 7
The embodiment provides a preparation method of a composite resin-based hard carbon material, which has the same process steps as those of embodiment 1, and is different in that:
in the step S1, uniformly mixing phenol formaldehyde type epoxy resin and aralkyl phenolic resin according to a mass ratio of 1:1 to obtain a resin mixture.
In the step S2, the resin mixture is transferred into an alumina ark, and is subjected to heat preservation for 8 hours at 120 ℃ for curing, so that a cured compound is obtained.
In step S4, the temperature is raised from room temperature to 1600 ℃ at a rate of 2 ℃/min, and the cured powder is subjected to high temperature for 6 hours.
Comparative example 1
This comparative example provides a method for preparing a resin-based hard carbon material, which is basically the same as example 1, except that:
in the step S1, uniformly mixing phenol formaldehyde type epoxy resin and aliphatic phenolic resin according to a mass ratio of 3:1 to obtain a resin mixture.
In the step S2, the resin mixture is transferred into an alumina ark, and is subjected to heat preservation at 120 ℃ for 8 hours for curing, so that a cured compound is obtained.
In step S4, the temperature is raised from room temperature to 1000 ℃ at a rate of 2 ℃/min, and the cured powder is subjected to high temperature for 6 hours.
Comparative example 2
This comparative example provides a method for preparing a resin-based hard carbon material, which is basically the same as example 1, except that: the process steps are substantially the same as in example 4 except that the step S2 heat curing step in example 4 is omitted.
Comparative example 3
The comparative example provides a method for preparing a resin-based hard carbon material, comprising the following steps:
s1, smashing phenol formaldehyde type epoxy resin to obtain powder solid.
S2, raising the temperature from room temperature to 1000 ℃ at a speed of 2 ℃/min, carrying out high-temperature treatment on the powder solid for 2 hours, and cooling to room temperature to obtain the resin-based hard carbon material.
Comparative example 4
The comparative example provides a method for preparing a resin-based hard carbon material, comprising the following steps:
s1, crushing biphenyl type phenolic resin to obtain powder solid.
S2, raising the temperature from room temperature to 1000 ℃ at a speed of 2 ℃/min, carrying out high-temperature treatment on the powder solid for 2 hours, and cooling to room temperature to obtain the resin-based hard carbon material.
Comparative example 5
The comparative example provides a method for preparing a resin-based hard carbon material, comprising the following steps:
s1, mixing phenol formaldehyde epoxy resin and imidazole according to the mass ratio of 100:1, adding 10% of ethanol as a solvent, and uniformly stirring to obtain a mixture.
S2, transferring the mixture into a heater, and heating at 95 ℃ for 4 hours to cure to obtain a cured product.
And S3, taking out the solidified product, and grinding the solidified product into powder to obtain a ground product.
S4, transferring the ground product into a reactor, heating to 1000 ℃ under argon atmosphere (heating rate is 5 ℃/min), and carbonizing for 1h to obtain a carbonized product.
And S5, cooling the carbonized product to room temperature, and taking out to obtain the phenol formaldehyde epoxy resin based nitrogen doped hard carbon material.
Performance test:
the hard carbon materials prepared in the test examples are respectively used as negative electrode materials to prepare batteries for performance test, and the method comprises the following steps:
preparing a negative electrode plate: and (3) uniformly mixing the hard carbon material prepared in the test example, carbon black and sodium alginate according to the mass ratio of 7:2:1, adding a proper amount of deionized water, stirring and mixing for 6 hours, coating the mixed slurry on a copper foil current collector, and vacuum drying to prepare the negative electrode plate.
The negative electrode sheet was combined with a glass fiber separator, a metallic sodium sheet, and a NaPF of 1.0mol in a glove box under argon atmosphere 6 And (3) taking a mixed solution of ethylene glycol dimethyl ether dissolved in 1L as an electrolyte to assemble the button cell.
And carrying out constant current charge and discharge test on the button cell:
the test voltage range is 0-2.0V, and the reversible specific capacity and the first coulombic efficiency of the sodium ion battery prepared by the hard carbon materials of each example and comparative example are obtained; current densities (unit: mA/g) of 50, 100, 200, 500, 1000, 2000 and 5000, to obtain the rate performance of sodium ion batteries prepared from the hard carbon materials of each of the examples and comparative examples; the current density was 500mA/g, and the charge and discharge cycles were 1000 weeks, to obtain the reversible specific capacity retention rate of sodium ion batteries prepared from the hard carbon materials of each example and comparative example.
The results of the performance tests are shown in the following table:
as can be seen from the above table, the sodium ion batteries prepared using the hard carbon materials of examples 1 to 7 have better overall performance than the comparative examples.
Furthermore, the inventors team, through extensive research, found that:
(1) The hard carbon material adopts phenol formaldehyde epoxy resin and aromatic phenolic resin curing agent according to the mass ratio of (10-1): 1, the prepared hard carbon negative electrode sodium ion battery is prepared by mixing, heat preservation and solidification for 1-16 h at 80-200 ℃ and high temperature (1000-1800 ℃) treatment for 1-10 h, and has better reversible specific capacity, cycle performance, coulombic efficiency and other performances.
(2) Under the same heat-preserving curing and high-temperature treatment process conditions, the performance advantage of the hard carbon negative electrode prepared by adopting the biphenyl type phenolic resin as the aromatic phenolic resin is obvious.
(3) In particular, the reversible specific capacity and coulombic efficiency of the sodium ion battery assembled using the hard carbon material prepared in optimal example 4 were higher.
It should be noted that the above examples are only for further illustrating and describing the technical solution of the present application, and are not intended to limit the technical solution of the present application, and the method of the present application is only a preferred embodiment and is not intended to limit the scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (10)
1. The preparation method of the composite resin-based hard carbon material is characterized by comprising the following steps of:
taking phenol formaldehyde type epoxy resin as a precursor, and uniformly mixing the phenol formaldehyde type epoxy resin and aromatic phenolic resin according to the mass ratio of (10-1): 1 to obtain a resin mixture;
the resin mixture is subjected to heat preservation and solidification at the temperature of 80-200 ℃ to obtain a solidified compound;
crushing the solidified compound to obtain solidified powder;
and under the protection of inert atmosphere, heating the solidified powder to 1000-1800 ℃ for high-temperature treatment to obtain the composite resin-based hard carbon material.
2. The method for producing a composite resin-based hard carbon material according to claim 1, wherein the aromatic phenol resin is at least one selected from the group consisting of an aralkyl phenol resin, a biphenyl phenol resin, and a bisphenol a phenol resin.
3. The method for producing a composite resin-based hard carbon material according to claim 2, wherein the mass ratio of the phenol formaldehyde type epoxy resin to the aromatic phenolic resin is (5-1): 1.
4. The method for preparing a composite resin-based hard carbon material according to any one of claims 1 to 3, wherein the heat-insulating curing time is 1 to 16 hours.
5. A method for producing a composite resin-based hard carbon material according to any one of claims 1 to 3, wherein the rate of temperature rise of the high-temperature treatment is 1 to 15 ℃/min, and the duration of the high-temperature treatment is 1 to 10 hours.
6. A method of producing a composite resin-based hard carbon material according to any one of claims 1 to 3, wherein the high temperature treatment is performed at a temperature of 1400 to 1800 ℃.
7. A composite resin-based hard carbon material prepared by the method of any one of claims 1 to 6.
8. A negative electrode sheet prepared by using a negative electrode slurry comprising the composite resin-based hard carbon material prepared by the method of any one of claims 1 to 6.
9. The negative electrode tab of claim 8, wherein the negative electrode tab is prepared from a negative electrode slurry comprising a conductive agent, a binder, a solvent, and a composite resin-based hard carbon material prepared by the method of any one of claims 1 to 6.
10. A sodium ion battery comprising the negative electrode sheet of claim 8 or 9.
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| CN202310538839.XA CN116969438A (en) | 2023-05-12 | 2023-05-12 | Composite resin-based hard carbon material, sodium ion battery and preparation method of sodium ion battery |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310538839.XA CN116969438A (en) | 2023-05-12 | 2023-05-12 | Composite resin-based hard carbon material, sodium ion battery and preparation method of sodium ion battery |
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