CN111470487A - Preparation method and application of biomass carbon material - Google Patents
Preparation method and application of biomass carbon material Download PDFInfo
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- CN111470487A CN111470487A CN202010392650.0A CN202010392650A CN111470487A CN 111470487 A CN111470487 A CN 111470487A CN 202010392650 A CN202010392650 A CN 202010392650A CN 111470487 A CN111470487 A CN 111470487A
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- 239000003575 carbonaceous material Substances 0.000 title claims abstract description 39
- 239000002028 Biomass Substances 0.000 title claims abstract description 37
- 238000002360 preparation method Methods 0.000 title claims abstract description 8
- 229910001415 sodium ion Inorganic materials 0.000 claims abstract description 29
- 229910001414 potassium ion Inorganic materials 0.000 claims abstract description 28
- NPYPAHLBTDXSSS-UHFFFAOYSA-N Potassium ion Chemical compound [K+] NPYPAHLBTDXSSS-UHFFFAOYSA-N 0.000 claims abstract description 27
- FKNQFGJONOIPTF-UHFFFAOYSA-N Sodium cation Chemical compound [Na+] FKNQFGJONOIPTF-UHFFFAOYSA-N 0.000 claims abstract description 26
- 238000005245 sintering Methods 0.000 claims abstract description 21
- 229920001592 potato starch Polymers 0.000 claims abstract description 20
- 229920002472 Starch Polymers 0.000 claims abstract description 13
- 235000019698 starch Nutrition 0.000 claims abstract description 13
- 239000008107 starch Substances 0.000 claims abstract description 13
- 238000004519 manufacturing process Methods 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims abstract description 10
- 238000000227 grinding Methods 0.000 claims abstract description 6
- 238000001035 drying Methods 0.000 claims abstract description 3
- 238000010438 heat treatment Methods 0.000 claims description 17
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 12
- 229910052593 corundum Inorganic materials 0.000 claims description 11
- 239000010431 corundum Substances 0.000 claims description 11
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 10
- 239000012299 nitrogen atmosphere Substances 0.000 claims description 8
- 238000001354 calcination Methods 0.000 claims description 7
- 239000008367 deionised water Substances 0.000 claims description 3
- 229910021641 deionized water Inorganic materials 0.000 claims description 3
- 230000007935 neutral effect Effects 0.000 claims description 3
- 230000001590 oxidative effect Effects 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims 3
- 238000004140 cleaning Methods 0.000 claims 1
- 238000000605 extraction Methods 0.000 claims 1
- 238000002156 mixing Methods 0.000 claims 1
- 239000000203 mixture Substances 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 23
- 238000004064 recycling Methods 0.000 abstract description 4
- 239000003513 alkali Substances 0.000 abstract description 3
- 229910052751 metal Inorganic materials 0.000 description 8
- 239000002184 metal Substances 0.000 description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- 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 6
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 description 6
- 239000011734 sodium Substances 0.000 description 6
- 241000894006 Bacteria Species 0.000 description 4
- 239000002033 PVDF binder Substances 0.000 description 4
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 4
- 239000006230 acetylene black Substances 0.000 description 4
- 238000012512 characterization method Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- 238000011056 performance test Methods 0.000 description 4
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 4
- 229910052700 potassium Inorganic materials 0.000 description 4
- 239000011591 potassium Substances 0.000 description 4
- 229910052708 sodium Inorganic materials 0.000 description 4
- 238000005303 weighing Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000009776 industrial production Methods 0.000 description 3
- 239000004310 lactic acid Substances 0.000 description 3
- 235000014655 lactic acid Nutrition 0.000 description 3
- 235000002595 Solanum tuberosum Nutrition 0.000 description 2
- 244000061456 Solanum tuberosum Species 0.000 description 2
- 238000002441 X-ray diffraction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000010406 cathode material Substances 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 230000001351 cycling effect Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000007773 negative electrode material Substances 0.000 description 2
- 238000001878 scanning electron micrograph Methods 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 241000233866 Fungi Species 0.000 description 1
- 239000012190 activator Substances 0.000 description 1
- 239000013543 active substance Substances 0.000 description 1
- 238000000498 ball milling Methods 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 150000001720 carbohydrates Chemical class 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000000855 fermentation Methods 0.000 description 1
- 230000004151 fermentation Effects 0.000 description 1
- 238000005087 graphitization Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 229920005610 lignin Polymers 0.000 description 1
- 239000001814 pectin Substances 0.000 description 1
- 229920001277 pectin Polymers 0.000 description 1
- 235000010987 pectin Nutrition 0.000 description 1
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Substances [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 1
- 229910000027 potassium carbonate Inorganic materials 0.000 description 1
- 235000019614 sour taste Nutrition 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000011232 storage material Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
-
- 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
- C01B32/05—Preparation or purification of carbon not covered by groups C01B32/15, C01B32/20, C01B32/25, C01B32/30
-
- 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
-
- 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
-
- 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 invention provides a preparation method and application of a biomass carbon material. In the production process of potato starch, a large amount of residues are generated after starch is extracted. And (3) taking a certain amount of starch residues, drying in an oven, and sintering and grinding to prepare the spherical biomass carbon material. In addition, the material is activated by strong alkali, and the porous biomass carbon material can be obtained. The material has better electrochemical performance when used as a sodium ion battery and a potassium ion battery. The method is simple and easy to operate, high in repeatability, low in economic cost, environment-friendly and suitable for recycling various biomass residues.
Description
Technical Field
The invention relates to a sodium ion and potassium ion battery cathode material, in particular to preparation and application of a biomass carbon material, and belongs to the field of energy storage materials and technologies.
Background
Nowadays, the problems of energy shortage and environmental protection have attracted people's high attention. In the industrial production of starch, a large amount of residues are produced, and the main components of the residues are cellulose, lignin, pectin, saccharides and the like. The soluble sugar contained in the lactic acid bacteria is easy to cause fermentation of the lactic acid bacteria to cause sour taste, the longer the storage time is, the larger the acidity is, and the lactic acid bacteria are easy to be polluted by fungi and putrefying bacteria to deteriorate. In order to respond to the national environmental protection requirement, the invention provides a simple and easy-to-operate starch residue treatment method. The invention recycles the sodium ions and the potassium ions to prepare the negative electrode carbon material with better electrochemical performance. Not only well solves the problem of waste residue in the industrial production process of starch, but also provides a new sodium and potassium ion battery cathode material.
Disclosure of Invention
The invention aims to solve the problem of recycling residues in the industrial production process of starch, and the residues are prepared into a biomass carbon material through a certain process, and the biomass carbon material has better electrochemical performance when being applied to negative electrode materials of sodium ion and potassium ion batteries.
The specific synthesis step is that a certain amount of potato starch residues are taken and placed in an oven to be dried for later use. And (3) placing the dried potato starch residues in a corundum boat, and performing two-step sintering in a tube furnace to obtain the spherical biomass carbon material.
The potato starch residue refers to residue generated after starch is extracted in the production process of potato starch.
The sintering comprises two steps, wherein the first step of sintering is to heat up to 200 ℃ at a heating rate of 3 ℃/min in an air environmentoAnd C, pre-oxidizing for 2-6h at the temperature of-260 ℃, and enhancing the shape and structural stability of the carbon material. The second step of sintering is to heat up to 600 ℃ at a heating rate of 3 ℃/min in a nitrogen atmosphereoCalcining at the temperature of between 900 and 1 to 3 hours to convert the potato starch residues into carbon materials and improve the graphitization degree of the carbon materials.
The technical scheme is that dried potato starch residues and a certain amount of strong base are ground, mixed, placed in a corundum boat, calcined in a tubular furnace under the protection of inert gas, washed to be neutral by hydrochloric acid and deionized water, and dried to obtain the porous biomass carbon material. The sintering condition is that the temperature is raised to 600-900 ℃ at the heating rate of 3 ℃/min and calcined for 1-3h under the nitrogen atmosphere.
The present invention uses KOH as an activator. Due to K+Radius ratio of Na+The radius is larger, the pore-forming capability is stronger, and the porous biomass carbon material can be obtained.
The mass ratio of the potato starch residues to the strong alkali is 1: 0.5-1.
The concentration of hydrochloric acid used is 2-5M.
The invention also provides an application of the prepared biomass carbon material in preparation of potassium ion batteries or sodium ion batteries.
The invention recycles potato residue starch residues in the industrial starch production process, prepares the potato residue starch residues into a biomass carbon material used as a negative electrode material of sodium ion and potassium ion batteries, and has the following characteristics:
(1) the preparation method is simple and easy to operate, has strong repeatability and is suitable for large-scale production. Meanwhile, the production cost is low, no by-product is generated in the production process, the production efficiency is high, and the method is environment-friendly.
(2) The preparation method provides a new solution for recycling the starch residue in the industrial starch production process, and is also suitable for recycling other biomass residues.
(3) The biomass carbon material prepared by the method has a spherical or porous shape. The spherical shape has a larger specific surface area, which is beneficial to the contact of the electrolyte and the active substance. The specific surface area of the prepared porous biomass carbon material is further increased through strong alkali corrosion, and meanwhile, the porous structure is also beneficial to ion transmission.
Drawings
FIG. 1 is a graph of the cycle performance of the material prepared in example 1, where A is a sodium ion battery and B is a potassium ion battery.
Fig. 2 is a graph of cycle performance of the material prepared in example 2, a being a sodium ion battery and B being a potassium ion battery. .
Fig. 3 is an XRD pattern of the material prepared in example 3.
FIG. 4 is SEM images of materials prepared in example 3 at different magnification sizes, wherein A is 100 μm, B is 10 μm, and C is 1 μm.
Fig. 5 is a graph of cycle performance of the material prepared in example 3, a being a sodium ion battery and B being a potassium ion battery.
FIG. 6 is a graph of the large current cycling performance of the material prepared in example 3, where A is a sodium ion battery and B is a potassium ion battery.
Fig. 7 is an XRD pattern of the material prepared in example 4.
FIG. 8 is SEM images of materials prepared in example 4 at different magnification sizes, wherein A is 100 μm, B is 10 μm, and C is 1 μm.
Fig. 9 is a graph of cycle performance of the material prepared in example 4, a being a sodium ion battery and B being a potassium ion battery.
FIG. 10 is a graph of the large current cycling performance of the material prepared in example 4, where A is a sodium ion battery and B is a potassium ion battery.
Detailed Description
Example 1
Weighing 2g of dried potato starch residues, flatly paving the dried potato starch residues in a corundum material boat, and putting the corundum material boat into a tube furnace. The biomass carbon material is obtained through two-step sintering. The first step of sintering is heating to 230 ℃ at the heating rate of 3 ℃/min in the air environment, pre-oxidizing for 4h, then the second step of sintering is heating to 700 ℃ at the heating rate of 3 ℃/min in the nitrogen atmosphere, calcining for 2h, naturally cooling to room temperature, and grinding to obtain the biomass carbon material. The material is mixed with acetylene black and PVDF according to the mass ratio of 8:1:1 and ground to prepare an electrode plate, and the electrode plate is assembled with metal sodium and metal potassium to form a sodium ion battery and a potassium ion battery to carry out electrochemical performance test. At 100 mAg-1The initial specific capacity of the sodium-ion battery is 238.2 mAh g at the current density of-1The first coulombic efficiency is 32.63%, and the coulombic efficiency is tested after 100 circles of continuous charge and discharge. At 100 mA g-1The initial specific capacity of the potassium ion battery is 110.9mAh g at the current density of (A)-1The first coulombic efficiency is 14.53%, and the capacity has certain attenuation after 100 circles of continuous charge and discharge tests (as shown in figure 1).
Example 2
Weighing 2g of dried potato starch residues, flatly paving the dried potato starch residues in a corundum material boat, and putting the corundum material boat into a tube furnace. The biomass carbon material is obtained through two-step sintering.The first step of sintering is to heat up to 230 ℃ at the heating rate of 3 ℃/min in the air environment, pre-oxidize for 4h, and then the second step of sintering is to heat up to 900 ℃ at the heating rate of 3 ℃/min in the nitrogen atmosphereoAnd C, calcining for 2h, naturally cooling to room temperature, and grinding to obtain the biomass carbon material. The material is mixed with acetylene black and PVDF according to the mass ratio of 8:1:1 and ground to prepare an electrode plate, and the electrode plate is assembled with metal sodium and metal potassium to form a sodium ion battery and a potassium ion battery to carry out electrochemical performance test. At 100 mAg-1The initial specific capacity of the sodium-ion battery is 231.5 mAh g at the current density of (A)-1The first coulombic efficiency is 28.17%, and the coulombic efficiency is tested after 100 circles of continuous charge and discharge. At 100 mA g-1The initial specific capacity of the potassium ion battery is 380.0mAh g at the current density of (1)-1The first coulombic efficiency is 13.73%, and after 100 circles of continuous charge and discharge tests, the capacity attenuation is serious, and the specific capacity is about 97 mAh g-1Left and right (as in fig. 2). The sodium ion battery capacity was reduced compared to example 1, and the cycle stability was significantly reduced although the potassium ion battery capacity was improved.
Example 3
Weighing 2g of dried potato starch residues, flatly paving the dried potato starch residues in a corundum material boat, and putting the corundum material boat into a tube furnace. The biomass carbon material is obtained through two-step sintering. The first step of sintering is to heat up to 230 ℃ at the heating rate of 3 ℃/min in the air environment, pre-oxidize for 4h, and then the second step of sintering is to heat up to 800 ℃ at the heating rate of 3 ℃/min in the nitrogen atmosphereoAnd C, calcining for 2h, naturally cooling to room temperature, and grinding to obtain the biomass carbon material. As can be seen by the results of XRD characterization of FIG. 3, the results are shown at 23.68o、42.84oCharacteristic peaks are shown, which correspond to the (002) and (101) crystal planes of carbon. As shown by the SEM characterization result in FIG. 4, the biomass carbon material prepared by the method has micron-sized spherical morphology. The material is mixed with acetylene black and PVDF according to the mass ratio of 8:1:1 and ground to prepare an electrode plate, and the electrode plate is assembled with metal sodium and metal potassium to form a sodium ion battery and a potassium ion battery to carry out electrochemical performance test. At 100 mA g-1At a current density of (a), the initial specific capacity of the sodium ion battery is 307.4 mAh g-1First coulomb effectThe rate is 54.22%, after 100 circles of continuous charge and discharge tests, the specific capacity is 132.6 mAh g-1(see fig. 5). At 100 mA g-1The initial specific capacity of the potassium ion battery is 304.2 mAh g at the current density of (A)-1The first coulombic efficiency is 66.19%, the capacity has certain attenuation after 100 circles of continuous charge and discharge tests, and the specific capacity is about 156.8 mAh g-1Left and right (as in fig. 5). Compared with the embodiment 1 and the embodiment 2, the capacity and the cycle performance of the sodium ion battery and the potassium ion battery are obviously improved. At 1000 mA g-1Under the current density, the initial specific capacity of the sodium-ion battery is 139.7mAh g-1The initial coulombic efficiency is 31.33 percent, and the initial specific capacity of the potassium ion battery is 239.1mAh g-1The first coulombic efficiency was 40.4%.
Example 4
Weighing 2g of dried potato starch residues and 2g of potassium hydroxide, ball-milling at 500r/min for 2h, spreading in a corundum boat, putting the boat in a tube furnace, and heating to 800 ℃ at a heating rate of 3 ℃/min in a nitrogen atmosphereoCalcining for 2h, and naturally cooling to room temperature. Washing with 3M hydrochloric acid solution to remove excessive potassium hydroxide and carbonate generated during reaction, washing with deionized water to neutral, and placing the material at 80 deg.CoAnd C, drying in an oven, and grinding to obtain the porous biomass carbon material. As seen from the results of XRD characterization of FIG. 7, the results are shown in 23.02o、42.94oCharacteristic peaks are shown, corresponding to the (002) and (101) crystal planes of carbon, respectively. As shown by the SEM characterization result of FIG. 8, the biomass carbon material prepared by the method has the morphology of a porous structure. The material is mixed with acetylene black and PVDF according to the mass ratio of 8:1:1 and ground to prepare an electrode plate, and the electrode plate is assembled with metal sodium and metal potassium to form a sodium ion battery and a potassium ion battery to carry out electrochemical performance test. At 100 mA g-1The initial specific capacity of the sodium-ion battery under the current density is 879.7 mAh g-1The first coulombic efficiency is 20.70 percent, and the specific capacity is 173.6 mAh g after 100 circles of continuous charge and discharge tests-1(see fig. 5). At 100 mA g-1The initial specific capacity of the potassium ion battery under the current density is 915.7mAh g-1The first coulombic efficiency is 12.97%, and after 100 circles of continuous charge and discharge tests, the specific capacity is about 150.1 mAhg-1Left and right (as in fig. 9). Compared with the embodiment 3, the first discharge specific capacity of the sodium ion battery and the potassium ion battery is obviously improved, but the first coulombic efficiency is lower, because the porous structure brings larger specific surface area, more SEI films are generated in the reaction process, more irreversible reactions occur, and the first coulombic efficiency is lower. But the capacity and the cycle performance are obviously improved. At 1000 mA g-1The initial specific capacity of the sodium-ion battery is 406.9mAh g under the current density-1The initial coulombic efficiency is 14.5%, and the initial specific capacity of the potassium ion battery is 512.4mAh g-1The first coulombic efficiency was 12.55%. The sodium/potassium ion battery has better cycle stability.
Claims (9)
1. A preparation method of a biomass carbon material is characterized in that potato starch residues are dried and placed in a corundum boat and sintered to obtain the biomass carbon material.
2. The method for producing a biomass carbon material according to claim 1, wherein the potato starch residue is a residue produced after starch extraction in a potato starch production process.
3. The method for preparing biomass carbon material according to claim 1, wherein the sintering comprises 2 steps, the first step sintering is heating to 200-260 ℃ at a heating rate of 3 ℃ min in an air environment, pre-oxidizing for 2-6h, and the second step sintering is heating to 600-900 ℃ at a heating rate of 3 ℃/min in a nitrogen atmosphere, and calcining for 1-3 h.
4. The method for preparing the biomass carbon material according to claim 1, wherein the biomass carbon material is prepared by mixing and grinding potato starch residue and strong base, placing the mixture in a corundum boat for sintering, cleaning the product obtained after sintering to be neutral by hydrochloric acid and deionized water, and drying the product.
5. The method for preparing biomass carbon material according to claim 4, wherein the sintering condition is calcination at a temperature rise rate of 3 ℃/min to 600-900 ℃ for 1-3h under nitrogen atmosphere.
6. The method for producing a biomass carbon material according to claim 4, wherein the strong base comprises sodium hydroxide or potassium hydroxide.
7. The method for producing a biomass carbon material according to claim 4, wherein the mass ratio of the potato starch residue to the strong base is 1: 0.5-1.
8. The method for producing a biomass carbon material according to claim 4, wherein the hydrochloric acid is used at a concentration of 2 to 5M.
9. Use of the biomass carbon material prepared according to any one of claims 1 to 8 for preparing a potassium ion battery or a sodium ion battery.
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CN112299391A (en) * | 2020-10-15 | 2021-02-02 | 南京师范大学 | Water chestnut derived oxygen-doped carbon material and preparation method and application thereof |
CN112436138A (en) * | 2020-10-26 | 2021-03-02 | 福建海峡石墨烯产业技术研究院有限公司 | Ligustrum-derived binderless self-standing carbon foam negative electrode material and preparation method thereof |
CN114275761A (en) * | 2021-12-22 | 2022-04-05 | 中国科学院江西稀土研究院 | Carbon material for producing singlet oxygen and preparation method and application thereof |
CN116692858A (en) * | 2023-04-17 | 2023-09-05 | 湖北万润新能源科技股份有限公司 | Preparation method and application of sodium ion battery biomass hard carbon anode material |
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