CN116553513A - Method for preparing carbon material from grease and application of carbon material as battery cathode - Google Patents
Method for preparing carbon material from grease and application of carbon material as battery cathode Download PDFInfo
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- CN116553513A CN116553513A CN202310488112.5A CN202310488112A CN116553513A CN 116553513 A CN116553513 A CN 116553513A CN 202310488112 A CN202310488112 A CN 202310488112A CN 116553513 A CN116553513 A CN 116553513A
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- 239000004519 grease Substances 0.000 title claims abstract description 85
- 239000003575 carbonaceous material Substances 0.000 title claims abstract description 60
- 238000000034 method Methods 0.000 title claims abstract description 24
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 50
- 235000014113 dietary fatty acids Nutrition 0.000 claims abstract description 29
- 239000000194 fatty acid Substances 0.000 claims abstract description 29
- 229930195729 fatty acid Natural products 0.000 claims abstract description 29
- 239000011734 sodium Substances 0.000 claims abstract description 28
- -1 fatty acid salt Chemical class 0.000 claims abstract description 27
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 26
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 21
- 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 claims abstract description 20
- NPYPAHLBTDXSSS-UHFFFAOYSA-N Potassium ion Chemical compound [K+] NPYPAHLBTDXSSS-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000012535 impurity Substances 0.000 claims abstract description 20
- 229910001414 potassium ion Inorganic materials 0.000 claims abstract description 20
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims abstract description 19
- 229910001415 sodium ion Inorganic materials 0.000 claims abstract description 19
- 238000001035 drying Methods 0.000 claims abstract description 18
- 238000000354 decomposition reaction Methods 0.000 claims abstract description 17
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 15
- 150000002148 esters Chemical class 0.000 claims abstract description 15
- 239000007773 negative electrode material Substances 0.000 claims abstract description 11
- 239000002994 raw material Substances 0.000 claims abstract description 9
- 238000005406 washing Methods 0.000 claims abstract description 9
- 238000001354 calcination Methods 0.000 claims description 34
- 229910001416 lithium ion Inorganic materials 0.000 claims description 23
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 18
- 239000000203 mixture Substances 0.000 claims description 17
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 16
- 229920000877 Melamine resin Polymers 0.000 claims description 14
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 claims description 14
- 238000010438 heat treatment Methods 0.000 claims description 13
- 239000002699 waste material Substances 0.000 claims description 12
- 239000000126 substance Substances 0.000 claims description 10
- 125000005456 glyceride group Chemical group 0.000 claims description 9
- 239000000047 product Substances 0.000 claims description 9
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 8
- 239000003463 adsorbent Substances 0.000 claims description 7
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 6
- 238000003837 high-temperature calcination Methods 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 239000002253 acid Substances 0.000 claims description 4
- 235000019441 ethanol Nutrition 0.000 claims description 4
- 235000011187 glycerol Nutrition 0.000 claims description 4
- 229910017053 inorganic salt Inorganic materials 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 4
- 238000000967 suction filtration Methods 0.000 claims description 4
- 239000010775 animal oil Substances 0.000 claims description 2
- 230000003197 catalytic effect Effects 0.000 claims description 2
- 239000004927 clay Substances 0.000 claims description 2
- 235000015112 vegetable and seed oil Nutrition 0.000 claims description 2
- 239000008158 vegetable oil Substances 0.000 claims description 2
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims 1
- 229910021536 Zeolite Inorganic materials 0.000 claims 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims 1
- 235000011114 ammonium hydroxide Nutrition 0.000 claims 1
- 239000004202 carbamide Substances 0.000 claims 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims 1
- 239000000741 silica gel Substances 0.000 claims 1
- 229910002027 silica gel Inorganic materials 0.000 claims 1
- 229920003002 synthetic resin Polymers 0.000 claims 1
- 239000000057 synthetic resin Substances 0.000 claims 1
- 239000010457 zeolite Substances 0.000 claims 1
- 229910052799 carbon Inorganic materials 0.000 abstract description 13
- 229910052744 lithium Inorganic materials 0.000 abstract description 9
- 239000010405 anode material Substances 0.000 abstract description 8
- 229910052708 sodium Inorganic materials 0.000 abstract description 8
- 238000003860 storage Methods 0.000 abstract description 8
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 abstract description 6
- 229910052700 potassium Inorganic materials 0.000 abstract description 6
- 239000011591 potassium Substances 0.000 abstract description 6
- 238000001179 sorption measurement Methods 0.000 abstract description 4
- 230000005540 biological transmission Effects 0.000 abstract description 3
- 238000003763 carbonization Methods 0.000 abstract description 3
- 230000007547 defect Effects 0.000 abstract description 3
- 239000002135 nanosheet Substances 0.000 abstract description 3
- 150000002500 ions Chemical class 0.000 abstract description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 13
- 239000011148 porous material Substances 0.000 description 8
- FKNQFGJONOIPTF-UHFFFAOYSA-N Sodium cation Chemical compound [Na+] FKNQFGJONOIPTF-UHFFFAOYSA-N 0.000 description 7
- 239000003792 electrolyte Substances 0.000 description 7
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 description 6
- JBTWLSYIZRCDFO-UHFFFAOYSA-N ethyl methyl carbonate Chemical compound CCOC(=O)OC JBTWLSYIZRCDFO-UHFFFAOYSA-N 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000004080 punching Methods 0.000 description 6
- 238000012360 testing method Methods 0.000 description 5
- SBLRHMKNNHXPHG-UHFFFAOYSA-N 4-fluoro-1,3-dioxolan-2-one Chemical compound FC1COC(=O)O1 SBLRHMKNNHXPHG-UHFFFAOYSA-N 0.000 description 4
- 238000011161 development Methods 0.000 description 4
- 229910002804 graphite Inorganic materials 0.000 description 4
- 239000010439 graphite Substances 0.000 description 4
- 239000010410 layer Substances 0.000 description 4
- 239000003921 oil Substances 0.000 description 4
- 235000019198 oils Nutrition 0.000 description 4
- 239000004215 Carbon black (E152) Substances 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 3
- 239000002033 PVDF binder Substances 0.000 description 3
- 239000006230 acetylene black Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 239000006258 conductive agent Substances 0.000 description 3
- 239000011889 copper foil Substances 0.000 description 3
- 125000004122 cyclic group Chemical group 0.000 description 3
- 230000001351 cycling effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 229930195733 hydrocarbon Natural products 0.000 description 3
- 150000002430 hydrocarbons Chemical class 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000005416 organic matter Substances 0.000 description 3
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- 230000002441 reversible effect Effects 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- VAYTZRYEBVHVLE-UHFFFAOYSA-N 1,3-dioxol-2-one Chemical compound O=C1OC=CO1 VAYTZRYEBVHVLE-UHFFFAOYSA-N 0.000 description 2
- 239000002028 Biomass Substances 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000001994 activation Methods 0.000 description 2
- 229910003481 amorphous carbon Inorganic materials 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000006555 catalytic reaction Methods 0.000 description 2
- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 125000000524 functional group Chemical group 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 125000005842 heteroatom Chemical group 0.000 description 2
- 238000009776 industrial production Methods 0.000 description 2
- 239000002440 industrial waste Substances 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- 239000010806 kitchen waste Substances 0.000 description 2
- 238000001000 micrograph Methods 0.000 description 2
- 239000012982 microporous membrane Substances 0.000 description 2
- 239000002064 nanoplatelet Substances 0.000 description 2
- 125000004433 nitrogen atom Chemical group N* 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- HMUNWXXNJPVALC-UHFFFAOYSA-N 1-[4-[2-(2,3-dihydro-1H-inden-2-ylamino)pyrimidin-5-yl]piperazin-1-yl]-2-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethanone Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)N1CCN(CC1)C(CN1CC2=C(CC1)NN=N2)=O HMUNWXXNJPVALC-UHFFFAOYSA-N 0.000 description 1
- VZSRBBMJRBPUNF-UHFFFAOYSA-N 2-(2,3-dihydro-1H-inden-2-ylamino)-N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]pyrimidine-5-carboxamide Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)C(=O)NCCC(N1CC2=C(CC1)NN=N2)=O VZSRBBMJRBPUNF-UHFFFAOYSA-N 0.000 description 1
- 229910013870 LiPF 6 Inorganic materials 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003225 biodiesel Substances 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000010406 cathode material Substances 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000003995 emulsifying agent Substances 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 125000005843 halogen group Chemical group 0.000 description 1
- 229910021385 hard carbon Inorganic materials 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000003361 porogen Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000004626 scanning electron microscopy Methods 0.000 description 1
- 239000000344 soap Substances 0.000 description 1
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical group [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
- 239000011573 trace mineral Substances 0.000 description 1
- 235000013619 trace mineral Nutrition 0.000 description 1
- 238000004627 transmission electron microscopy Methods 0.000 description 1
- 238000001291 vacuum drying Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Classifications
-
- 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
-
- 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
- H01M10/052—Li-accumulators
-
- 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
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- 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
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Carbon And Carbon Compounds (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The invention discloses a method for preparing a carbon material by grease and application of the carbon material as a battery cathode, which comprises the following steps: step 1: purifying grease in raw materials, and step 2: grease ester decomposition reaction to form higher fatty acid salt, step 3: adding a nitrogen-rich agent into the higher fatty acid salt, and step 4: high-temperature carbonization, and step 5: and (3) washing, removing impurities and drying to obtain a carbon material, wherein the step (6) is as follows: the carbon material is applied to a lithium/sodium/potassium ion battery as a negative electrode. According to the novel method for preparing the carbon anode material, grease is used as a raw material, and the nitrogen-rich porous carbon nano-sheet is obtained through the process steps, and the nano-sheet structure can improve the ion transmission efficiency; the porous structure can improve the lithium/sodium/potassium storage capacity; the nitrogen-rich structure can introduce different types of defects, providing anchor sites for lithium/sodium/potassium adsorption. The carbon negative electrode material prepared from the grease is applied to a lithium/sodium/potassium ion battery, so that the specific capacity, the ploidy and the cycle life of the battery are greatly improved.
Description
Technical Field
The invention relates to the technical field of grease application, in particular to a method for preparing a carbon material from grease and application of the carbon material as a battery cathode.
Background
The widespread use of renewable energy requires the development of efficient, low cost green energy storage systems. Sodium Ion Batteries (SIBs) and Potassium Ion Batteries (PIBs) also have many advantages over the popular market Lithium Ion Batteries (LIBs), including abundant sodium (2.3 wt%) and potassium (1.5 wt%) resources, low cost, lower redox potential, etc. The working principle and the battery device are similar to those of a lithium ion battery, and the lithium ion battery is an ideal candidate of a high-performance battery in a large storage device. However, the conventional graphite negative electrode for lithium ion batteries is not suitable for SIBs and PIBs, and serious volume expansion (collapse of graphite structure) occurs during charge and discharge, resulting in poor cycle stability. Therefore, the performance breakthrough of lithium, sodium and potassium ion batteries and the development of negative electrode materials are of great importance. The biomass-based hard carbon has the characteristics of abundant raw material resources, low cost and environmental protection, and is considered as the most potential negative electrode material of lithium, sodium and potassium batteries.
The electrode preparation raw material adopted by the invention is biomass grease, and common sources are vegetable oil, animal oil, used industrial waste oil, kitchen waste oil and the like. At present, grease is widely applied in various fields, mainly used for eating, but also widely used for manufacturing soaps, paints, biodiesel, emulsifying agents, lubricants and the like. However, the waste gas, waste liquid and waste residue generated by the secondary products manufactured by the grease, such as carbon dioxide, can be discharged into the nature again, so that the greenhouse effect is aggravated, and the novel development concept of low-carbon life and environmental protection is not met. Therefore, how to efficiently utilize the grease in a recycling way becomes important, particularly reduces the pollution of waste grease (such as industrial waste oil and kitchen waste oil) to the environment, maintains the carbon balance of an ecological system, and obtains good environmental and economic benefits. The research shows that the main component of the grease is unsaturated fatty glyceride, which is rich inThe rich long-chain hydrocarbon molecules contain a large amount of carbon. Meanwhile, the waste grease also contains rich trace elements such as N, B, S, P and the like. Unlike other carbon sources, the long-chain hydrocarbon molecules of the grease are easily decomposed into C after being calcined at high temperature 5 -C 8 Short chain hydrocarbon molecules in the range, thereby forming carbon nano-sheets with different structures. Meanwhile, the heteroatom on the carbon material can improve the reactivity of the carbon material and be Li in the battery by modifying the functional group on the surface of the heteroatom + 、Na + 、K + Additional storage sites are provided to significantly enhance the electrochemical performance of the carbon material. This offers the possibility for its conversion to carbon materials and application to battery anode materials and exhibits excellent potential.
According to the invention, grease is upgraded and converted into the anode material, and the anode material is applied to the technical field of new energy batteries, so that not only is excellent battery performance obtained, but also waste grease is recycled, environmental pollution and resource waste can be reduced, and the increment and high-efficiency utilization of grease are realized.
Disclosure of Invention
The invention aims to provide a method for preparing a carbon material from grease and application of the carbon material as a battery cathode, so as to expand the application direction of the grease and solve the problems of recycling of waste grease and high cost of raw materials for manufacturing the battery electrode carbon material.
The technical scheme adopted by the invention for solving the technical problems is that the method for preparing the carbon material by the grease and the application of the carbon material as the battery cathode comprise the following steps:
step 1: the grease is purified, raw material grease contains various impurities, firstly, the grease is filtered by a suction filtration device, larger particulate matters can be removed, and the purity of the grease is improved; finally, small-particle impurities are adsorbed by an adsorbent and kept stand, and grease is purified, namely the high-purity higher fatty glyceride;
step 2: solidifying the grease, adding a proper amount of alkaline substances into the high-purity higher fatty acid glyceride purified in the step 1, adding absolute ethyl alcohol, stirring, accelerating the reaction, obtaining glycerin and higher fatty acid salt with main components through ester decomposition reaction, and extracting the higher fatty acid salt in the mixture;
step 3: adding a nitrogen-rich agent into the higher fatty acid salt obtained in the step 2, and uniformly mixing;
step 4: calcining at high temperature, namely placing the mixture of the higher fatty acid salt and the melamine obtained in the step 3 in a high-temperature calcining device to calcine until the mixture of the higher fatty acid salt and the nitrogen-rich agent is completely carbonized;
step 5: washing and drying, namely washing the calcined product with acid and ethanol for a plurality of times, removing inorganic salt impurities, organic matter impurities and the like in the product, and drying.
Step 6: and (3) taking the carbon material obtained in the step (5) as a negative electrode material of a lithium, sodium and potassium ion battery, and applying the carbon material to the lithium, sodium and potassium ion battery.
Preferably: and (2) adding a proper amount of adsorbent in the step (1), stirring, standing, removing impurities in the grease, and filtering and purifying.
Preferably: the mass ratio of the higher fatty glyceride to the alkaline substance in the ester decomposition reaction in the step 2 is 1 (1-3).
Preferably: the catalytic condition of the ester decomposition reaction in the step 2 is heated by water bath, and the heating temperature is controlled to be 50-100 ℃.
Preferably: and (3) adding a nitrogen-rich agent and grease in the mass ratio of 1 (3-5), and carrying out nitrogen element doping to enhance the electrochemical performance of the material.
Preferably: the high-temperature calcination in the step 4 comprises the following steps:
(1) Primary calcination: placing the mixture of the higher fatty acid salt and the melamine in a calcining device, and raising the temperature to 150-500 ℃;
(2) Secondary calcination: after primary calcination, heating the obtained material to 600-2500 ℃, and continuously calcining for 0.5-5 hours while keeping the temperature unchanged;
in the primary calcination process, the temperature is gradually increased to 150-500 ℃ with a lower temperature in a sectional way, the temperature is increased to 150 ℃ and 350 ℃ respectively and continuously calcined, then the temperature is continuously increased (5 ℃/min), the higher temperature is finally reached to 600-2500 ℃, secondary calcination is carried out, and the secondary calcination temperature is continuously maintained for 0.5-5 hours.
Preferably: and (3) controlling the drying temperature in the step (5) to be 50-200 ℃, and adopting a vacuum oven to carry out auxiliary drying.
Compared with the negative electrode carbon material of the existing battery, the invention has the beneficial effects that:
the invention utilizes grease to prepare the high-quality electrode carbon material suitable for Lithium Ion Batteries (LIBs), sodium Ion Batteries (SIBs) and Potassium Ion Batteries (PIBs), produces clean energy sources and improves the comprehensive utilization value of the grease. The waste grease recycling application field is widened, the urban pollution caused by the waste grease is reduced, the production cost of the electrode carbon material can be well reduced, and the development of the new energy battery industry is promoted.
(1) Through researching the structure and the performance of the final product carbon material, the grease (including waste grease) refining step is simplified, the process links with smaller influence are removed, a simple and efficient grease refining path is optimized, the production time is saved, the production cost is reduced, and the possibility is provided for industrial production.
(2) The production efficiency of the ester decomposition reaction is improved, and the grease is efficiently converted into the higher fatty acid salt, so that the high yield of the final carbon material is ensured. The yield of converting the grease into the carbon material is improved to 80% through optimizing the ester decomposition reaction and the carbonization reaction.
(3) The preparation process comprises using alkaline substance (such as potassium hydroxide KOH) and nitrogen-rich agent (such as melamine C) 3 N 3 (NH 2 ) 3 ) As a dual porogen, it is possible to provide a carbon material with a rich pore size. By controlling the pore-forming dosage and optimizing the pore-forming condition, the specific surface area of the carbon material is increased to 1500m 2 g -1 The pore volume reaches 1cm 3 g -1 The above.
(4) With nitrogen-rich agents (e.g. melamine C 3 N 3 (NH 2 ) 3 ) Increasing nitrogen content in carbon materials as a nitrogen source by optimizing C 3 N 3 (NH 2 ) 3 Doping amount and doping reaction temperature and time, thereby the carbon materialThe nitrogen content of (2) is increased. Because the N atom on the carbon material has strong electronegativity and lone pair electrons, the N atom has a strong electronegativity to Li + 、Na + And K + The adsorption capacity of (c) is much greater than that of the carbon material itself, thereby increasing the electrochemical storage capacities of Lithium Ion Batteries (LIBs), sodium Ion Batteries (SIBs) and Potassium Ion Batteries (PIBs).
(5) The nitrogen-enriched porous carbon material prepared by the invention has a plurality of advantages in structure, and excellent electrochemical performance can be obtained in Lithium Ion Batteries (LIBs), sodium Ion Batteries (SIBs) and Potassium Ion Batteries (PIBs). Wherein the specific capacity for LIBs reaches 1331mAhg -1 The coulomb efficiency of the first circle reaches more than 85 percent, and the cycle stability reaches more than 1000 circles; specific capacities for SIBs reach 489mAhg -1 The coulomb efficiency of the first circle reaches more than 60 percent, and the cycle stability reaches more than 1000 circles; specific capacities for PIBs reach 388mAhg -1 The coulomb efficiency of the first circle reaches more than 50%, and the cycle stability reaches more than 1000 circles. The stable and excellent electrochemical performance is obtained, so that a foundation is laid for further industrial production of the anode material prepared from the grease.
Drawings
FIG. 1 is an X-ray diffraction test chart of a carbon material;
FIG. 2 is a graph of nitrogen adsorption and desorption tests of carbon materials;
FIG. 3 is a graph of pore size distribution of a carbon material;
FIG. 4 is a scanning electron microscope image of a carbon material;
FIG. 5 is a transmission electron microscope image of a carbon material;
fig. 6 is a cyclic charge-discharge test chart of Lithium Ion Batteries (LIBs);
FIG. 7 is a graph of cyclic charge and discharge tests of Sodium Ion Batteries (SIBs);
fig. 8 is a cyclic charge-discharge test chart of Potassium Ion Batteries (PIBs).
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the data in the embodiments of the present invention.
The method for preparing the anode material by the grease comprises the following steps:
step 1: purifying grease, particularly, the waste grease contains a large amount of granular impurities, and firstly, the grease is filtered by a suction filtration device; then adsorbing small-particle impurities by an adsorbent, standing, and purifying to obtain grease, namely high-purity higher fatty glyceride;
step 2: solidifying the grease, adding a proper amount of alkaline substances into the high-purity higher fatty acid glyceride purified in the step 1, adding absolute ethyl alcohol, stirring, accelerating the reaction, obtaining glycerin and higher fatty acid salt with main components through ester decomposition reaction, and extracting the higher fatty acid salt in the mixture;
step 3: adding a nitrogen-rich agent into the higher fatty acid salt obtained in the step 2, and uniformly mixing;
step 4: calcining at high temperature, namely placing the mixture of the higher fatty acid salt and the melamine obtained in the step 3 in a high-temperature calcining device to calcine until the mixture of the higher fatty acid salt and the melamine is completely carbonized;
step 5: washing and drying, namely washing the calcined product with acid and ethanol for a plurality of times to remove inorganic salt impurities, organic matter impurities and the like in the product, and drying to obtain the electrode carbon material which can be used as Lithium Ion Batteries (LIBs), sodium Ion Batteries (SIBs) and Potassium Ion Batteries (PIBs).
Step 6: and (3) taking the carbon material obtained in the step (5) as a negative electrode material of a lithium, sodium and potassium ion battery, and applying the carbon material to the lithium, sodium and potassium ion battery.
Further: in the step 1, a proper amount of adsorbent is added, stirred and then kept stand, and then filtered and purified, wherein the addition of the adsorbent can polymerize small-sized and medium-sized particulate matters in the liquid together to form large-sized particulate matters, so that impurities in the mixed liquid can be removed more rapidly and effectively, purer grease is obtained, and the produced electrode carbon material is prevented from being influenced by the impurities in the grease.
Further: the mass ratio of the higher fatty glyceride to the alkaline substance in the ester decomposition reaction in the step 2 is 1 (1-3).
Further: in the step 2, water bath heating is adopted during catalysis of the ester decomposition reaction, the heating temperature is controlled to be 50-100 ℃, the water bath heating can better meet the temperature requirement of experimental chemical reaction, the heating process is more stable, and the influence of the temperature of a heat source can be avoided.
Further: and (3) adding a nitrogen-rich agent and grease in the mass ratio of 1 (3-5), and carrying out nitrogen element doping to enhance the electrochemical performance of the material. And the potassium hydroxide and the nitrogen-rich agent (such as melamine) can mutually assist in achieving the pore-forming effect while achieving the respective effects.
Further: the high-temperature calcination in the step 4 comprises the following steps:
(1) Primary calcination: placing the mixture of the higher fatty acid salt and the melamine in a calcining device, and raising the temperature to 150-500 ℃;
(2) Secondary calcination: after primary calcination, heating the obtained material to 600-2500 ℃, and continuously calcining for 0.5-5 hours while keeping the temperature unchanged;
further: in the primary calcination process, the temperature is gradually increased to 150-500 ℃ with a lower temperature in a sectional way, the temperature is increased to 150 ℃ and 350 ℃ respectively and continuously calcined, then the temperature is continuously increased (5 ℃/min), the higher temperature is finally reached to 600-2500 ℃, secondary calcination is carried out, and the secondary calcination temperature is continuously maintained for 0.5-5 hours. Each gradient is calcined for a certain time, so that the calcination is enough and the carbonization is more thorough.
Further: and (3) controlling the drying temperature in the step (5) to be 50-200 ℃, and adopting a vacuum oven to carry out auxiliary drying.
Further: the carbon cathode material in the step 6 is used as a working electrode of a lithium, sodium and potassium ion battery, and lithium, sodium and potassium metals are used as counter electrodes.
Example 1:
the embodiment is a method for preparing a negative electrode material (NWCOC 650) from grease, which comprises the following specific steps:
step 1: the grease is purified, raw material grease contains various impurities, firstly, the grease is filtered by a suction filtration device, larger particulate matters can be removed, and the purity of the grease is improved; finally, adsorbing small-particle impurities by using absorbent activated clay, standing, and purifying to obtain grease, namely high-purity higher fatty glyceride;
step 2: solidifying the grease, adding a proper amount of alkaline substance potassium hydroxide (the mass ratio of the grease to the potassium hydroxide is 1:3) into the high-purity higher fatty glyceride purified in the step 1, and adding absolute ethyl alcohol for stirring. The catalytic reaction of the ester decomposition is carried out by heating in water bath, and the heating temperature is controlled at 90 ℃. Glycerin and higher fatty acid salt as main components can be obtained through ester decomposition reaction, and the higher fatty acid salt in the mixture is extracted;
step 3: adding a nitrogen-rich agent melamine (the mass ratio of grease to melamine is 3:1) into the higher fatty acid salt obtained in the step 2, and uniformly mixing;
step 4: high-temperature calcination, namely placing the mixture of the higher fatty acid salt and the melamine obtained in the step 3 into a high-temperature calcination device for segmented calcination, continuously heating (5 ℃/min) after the mixture is respectively and continuously calcined at the temperature of 150 ℃ and the temperature of 350 ℃, finally reaching the higher temperature of 650 ℃, and performing secondary calcination for 0.5-5 hours until the mixture of the higher fatty acid salt and the melamine is completely carbonized;
step 5: washing and drying, namely washing the calcined product with acid and ethanol for multiple times, removing inorganic salt impurities, organic matter impurities and the like in the product, and drying in a vacuum drying oven for 12 hours to obtain the carbon negative electrode material, which is named NWCOC650.
Step 6: and 5, taking the carbon material obtained in the step 5 as a working electrode of the lithium, sodium and potassium ion battery, taking lithium, sodium and potassium metal sheets as counter electrodes, and assembling the lithium, sodium and potassium ion battery.
As shown in fig. 1, 2, 3, 4 and 5, the present example discloses structural characterization of a negative electrode material (NWC 0C 650) prepared from grease:
the material substance composition was analyzed by an X-ray diffractometer as shown in fig. 1. Two broad characteristic peaks corresponding to the (002) and (101) crystal planes of amorphous carbon can be observed at about 2θ=23.6° and 2θ=43.6°.The (002) peak of NWCOC650 sample was at a lower angle than the standard 26 ° graphite peak (002), indicating that the carbon material prepared from grease had a larger lattice spacing. Can promote Li + /Na + /K + And maintains structural stability.
As shown in fig. 2, the NWCOC650 is a mixed shape of an I/IV isotherm and an H3 hysteresis loop, which indicates that a rich micropore/mesopore structure exists in the NWCOC650. The specific surface area of Brunauer-Emmett-Teller is 805.81m 2 g -1 Can be Li + /Na + /K + The ions and electrons provide a sufficient electrode/electrolyte interface.
As shown in the pore size distribution diagram of FIG. 3, the pore size of NWCOC650 is centered between 1nm and 6nm with an incremental pore volume of 0.037cm 3 g -1 . A large number of tiny mesopores appear at about 3.7nm, which makes it more advantageous for larger radius Na + /K + The electrolyte permeation is improved by storage, more active sites can be ensured by more defects/edges, and the electrochemical performance of the anode material is improved.
As shown in the surface topography and microstructure of fig. 4 (scanning electron microscopy) and fig. 5 (transmission electron microscopy), NWCOC650 is a three-dimensional framework consisting of irregular carbon nanoplatelets. The turbine layer structure shown by high-power transmission consists of locally distorted graphite-like domains and pores of non-uniform size, the diffraction halo type being attributable to amorphous carbon. NWCOC650 all had a larger interlayer spacing (0.4192 nm) than graphite interlayer spacing (0.34 nm). This contributes to structural stability, shortened diffusion path and longer cycle life, promoting Li + /Na + /K + Is stored by adsorption and is charged and discharged rapidly.
Example 2:
the embodiment is a lithium ion battery application of preparing a negative electrode material (NWCOC 650) from grease, and the specific steps are as follows:
the counter electrode of the embodiment is a lithium sheet, the diaphragm is a Celgard2500 microporous membrane, and the electrolyte is LiPF 6 (1 mol) comprising Ethylene Carbonate (EC)/ethylmethyl carbonate (EMC) (volume ratio 3:7) and 2.0% Vinylene Carbonate (VC).
Uniformly mixing binder polyvinylidene fluoride, conductive agent acetylene black and electrode carbon material NWCOC650 according to the mass ratio of 8:1:1, adding a proper amount of N-methyl pyrrolidone, uniformly dispersing, coating on a current collector copper foil, drying, rolling, and punching into a wafer (with the diameter of 14 mm) by a punching machine to assemble a lithium ion battery (CR 2032 type).
FIG. 6 is a charge-discharge diagram of NWCOC650 in 1000 cycles (current density 100 mAhg) of example 1 -1 ) NWCOC650 exhibits excellent charge-discharge cycle stability. During cycling, the specific capacity increases slightly, attributable to electrolyte decomposition and activation processes. In cycle 2, the discharge capacity value rapidly drops to 1219.9mAhg -1 . Significant capacity loss (2996.2 mAhg -1 ) Is formed by SEI film formation and Li + Permanent trapping in the pores results. From cycle 2, the reversible capacity decay is very slow, indicating that NWCOC650 has stable lithium storage behavior. After 1000 cycles, the capacity was stabilized at 887.4mAhg -1 . In addition, coulombic efficiency was increased and maintained around 100%, indicating that NWCOC650 electrode performed stably in subsequent cycles.
Example 3:
the embodiment is a sodium ion battery application of grease preparation anode material (NWCOC 650), and specifically comprises the following steps:
the counter electrode of the embodiment is a sodium sheet, the diaphragm is Whatman GF/D glass fiber, and the electrolyte is NaClO 4 (1 mol) comprising Ethylene Carbonate (EC)/dimethyl carbonate (DMC)/ethylmethyl carbonate (EMC) (volume ratio 1:1:1) and 2.0% fluoroethylene carbonate (FEC).
Uniformly mixing binder polyvinylidene fluoride, conductive agent acetylene black and electrode carbon material NWCOC650 according to the mass ratio of 8:1:1, adding a proper amount of N-methyl pyrrolidone, uniformly dispersing, coating on a current collector copper foil, drying, rolling, and punching into a wafer (with the diameter of 14 mm) by a punching machine to assemble a lithium ion battery (CR 2032 type).
FIG. 7 is a charge-discharge diagram of NWCOC650 in example 2 (current density 100 mAhg) -1 ) NWCOC650 exhibits excellent cycling stability. Specific volume during circulationThe slight increase in the amount can be attributed to the electrolyte decomposition and activation process, with a rapid decrease in the discharge capacity value to 508.2mAhg for cycle 2 -1 . Significant capacity loss (1387.3 mAhg) -1 ) Is formed by SEI layer formation and Na in hole + Is caused by permanent capture of the (c). From cycle 2, the reversible capacity fade is very slow, thus indicating that NWCOC650 has stable sodium storage behavior. After 1000 cycles, the capacity is still stable at 312.8mAhg -1 . In addition, coulombic efficiency increased and remained around 100%, indicating that NWCOC650 electrode had good cycling performance.
Example 4:
the embodiment is a potassium ion battery application of preparing a negative electrode material (NWCOC 650) from grease, and comprises the following specific steps:
the counter electrode of the embodiment is a potassium sheet, the diaphragm adopts a double-layer Whatman GF/D glass fiber and Celgard2500 microporous membrane, and the electrolyte is KPF 6 (1 mol) comprising Ethylene Carbonate (EC)/dimethyl carbonate (DMC)/ethylmethyl carbonate (EMC) (volume ratio 1:1:1) and 0.5% fluoroethylene carbonate (FEC).
Uniformly mixing binder polyvinylidene fluoride, conductive agent acetylene black and electrode carbon material NWCOC650 according to the mass ratio of 8:1:1, adding a proper amount of N-methyl pyrrolidone, uniformly dispersing, coating on a current collector copper foil, drying, rolling, and punching into a wafer (with the diameter of 14 mm) by a punching machine to assemble a lithium ion battery (CR 2032 type).
FIG. 8 is a charge-discharge pattern of NWCOC650 at 1000 cycles (current density 100 mAhg) in example 3 -1 ) After 1000 cycles, the capacity slowly decreased and then returned to 226.8mAh g -1 The coulomb efficiency increases to around 100%. The high rate performance and the cycle stability of NWCOC650 confirm the importance of the nitrogen-containing functional group in the grease as the negative electrode of the PIBs of the potassium ion battery, and NWCOC650 electrodes show similar Na + And K + Storage capacity. The high reversible capacity and excellent rate capability of NWCOC650 is due to the synergistic effects of high nitrogen doping levels, thin carbon nanoplatelets, large lattice spacing, and defect-rich turbine layer structure.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The method for preparing the carbon material by the grease and the application of the carbon material as the battery cathode are characterized by comprising the following steps:
step 1: the grease is purified, raw material grease contains various impurities, firstly, the grease is filtered by a suction filtration device, larger particulate matters can be removed, and the purity of the grease is improved; finally, small-particle impurities are adsorbed by an adsorbent and kept stand, and grease is purified, namely the high-purity higher fatty glyceride;
step 2: solidifying the grease, adding a proper amount of alkaline substances into the high-purity higher fatty acid glyceride purified in the step 1, adding absolute ethyl alcohol, stirring, accelerating the reaction, obtaining glycerin and higher fatty acid salt with main components through ester decomposition reaction, and extracting the higher fatty acid salt in the mixture;
step 3: adding a nitrogen-rich agent into the higher fatty acid salt obtained in the step 2, and uniformly mixing;
step 4: calcining at high temperature, namely placing the mixture of the higher fatty acid salt and the nitrogen-rich agent obtained in the step 3 in a high-temperature calcining device to perform calcination until the mixture of the higher fatty acid salt and the nitrogen-rich agent is completely carbonized;
step 5: washing and drying, namely washing the calcined product obtained in the step 4 with acid and ethanol for a plurality of times, removing inorganic salt impurities and organic impurities in the product, and drying.
Step 6: and (3) taking the carbon material obtained in the step (5) as a negative electrode material of a lithium, sodium and potassium ion battery, and applying the carbon material to the lithium, sodium and potassium ion battery.
2. The method for preparing carbon material by grease according to claim 1 and its application as battery cathode, characterized in that: the raw material grease in the step 1 is animal oil, vegetable oil or waste grease.
3. The method for preparing carbon material by grease according to claim 1 and its application as battery cathode, characterized in that: the adsorbent used in the step 1 is activated clay, diatomite, activated carbon, silica gel, activated alumina, synthetic zeolite or synthetic resin.
4. The method for preparing carbon material by grease according to claim 1 and its application as battery cathode, characterized in that: the alkaline substance required by the ester decomposition reaction in the step 2 is sodium hydroxide, potassium hydroxide or ammonia water.
5. The method for preparing carbon material by grease according to claim 4 and its application as battery cathode, characterized in that: the mass ratio of the higher fatty glyceride and the alkaline substance in the ester decomposition reaction is 1 (1-3).
6. The method for preparing carbon material by grease according to claim 1 and its application as battery cathode, characterized in that: in the step 2, the ester decomposition reaction adopts water bath heating as a catalytic condition, and the heating temperature is controlled within the range of 50-150 ℃.
7. The method for preparing carbon material by grease according to claim 1 and its application as battery cathode, characterized in that: the nitrogen-rich agent used in step 3 is melamine or urea.
8. The method for preparing carbon material by grease according to claim 7 and its application as battery cathode, characterized in that: the mass ratio of the nitrogen-rich agent to the grease is 1 (3-5).
9. The method for preparing carbon material by grease according to claim 1 and its application as battery cathode, characterized in that: the high-temperature calcination in the step 4 comprises the following steps:
(1) Primary calcination: placing the mixture of the higher fatty acid salt and the melamine in a calcining device, and raising the temperature to 150-500 ℃;
(2) Secondary calcination: after primary calcination, heating the obtained material to 600-2500 ℃, and continuously calcining for 0.5-5 hours while keeping the temperature unchanged;
in the primary calcination process, the temperature is gradually increased to 150-500 ℃ with a lower temperature in a sectional way, the temperature is increased to 150 ℃ and 350 ℃ respectively and continuously calcined, then the temperature is continuously increased (5 ℃/min), the higher temperature is finally reached to 600-2500 ℃, secondary calcination is carried out, and the secondary calcination temperature is continuously maintained for 0.5-5 hours.
10. The method for preparing carbon material by grease according to claim 1 and its application as battery cathode, characterized in that: and (3) controlling the drying temperature in the step (5) to be 50-200 ℃, and adopting a vacuum oven to carry out auxiliary drying.
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| CN117383541A (en) * | 2023-12-11 | 2024-01-12 | 成都万潜科延科技有限公司 | Method for preparing carbon material by using mechanical waste oil, carbon material and application |
| CN117431082A (en) * | 2023-12-11 | 2024-01-23 | 成都万潜科延科技有限公司 | Catalytic carbonization method of tar generated by biomass pyrolysis, carbon material and application |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117383541A (en) * | 2023-12-11 | 2024-01-12 | 成都万潜科延科技有限公司 | Method for preparing carbon material by using mechanical waste oil, carbon material and application |
| CN117431082A (en) * | 2023-12-11 | 2024-01-23 | 成都万潜科延科技有限公司 | Catalytic carbonization method of tar generated by biomass pyrolysis, carbon material and application |
| CN117383541B (en) * | 2023-12-11 | 2024-02-27 | 成都万潜科延科技有限公司 | Method for preparing carbon material by using mechanical waste oil, carbon material and application |
| CN117431082B (en) * | 2023-12-11 | 2024-03-08 | 成都万潜科延科技有限公司 | Catalytic carbonization method of tar generated by biomass pyrolysis, carbon material and application |
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