CN111211308A - Loofah sponge biomass carbon-loaded red phosphorus lithium ion battery negative electrode material and preparation method thereof - Google Patents
Loofah sponge biomass carbon-loaded red phosphorus lithium ion battery negative electrode material and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a loofah sponge biomass carbon-loaded red phosphorus lithium ion negative electrode material and a preparation method thereof, the invention takes red phosphorus and loofah sponge biomass carbon as raw materials, the loofah sponge biomass carbon is mixed with the red phosphorus according to a certain proportion after being treated, then isolating oxygen and calcining at high temperature to obtain the cathode material of the red phosphorus and biomass carbon composite battery, according to the invention, the biomass carbon material has the natural advantages of low cost, simple carbonization operation and the like, the biomass carbon material has the advantages of rich pore structure, large specific surface area of the biomass carbon material, oxygen-containing active groups on the surface of the precursor of the biomass carbon material and the like, and the biomass carbon and red phosphorus composite battery cathode material carbonized at high temperature overcomes the defect of poor red phosphorus conductivity, and moreover, the problem of volume expansion of red phosphorus in the charging and discharging processes is effectively buffered by utilizing the porous structure on the surface of the biomass carbon.
Description
Technical Field
The invention relates to the field of lithium ion battery cathode materials, in particular to a loofah sponge biomass carbon-loaded red phosphorus lithium ion cathode material and a preparation method thereof.
Background
Lithium ion batteries have been widely used in various electronic devices, such as mobile phones, portable computers, and the like, as one of important energy storage systems. The lithium ion battery mainly has the advantages of high working voltage, large specific capacity, long cycle life and the like. At present, commercial lithium ion batteries have been successful, but the further development of the batteries is still limited to a large extent due to poor low capacity and rate performance, and the extensive exploration of negative electrode materials with high energy density and excellent rate performance is still an important development direction.
In the alloy conversion type lithium-storing negative electrode material, Red phosphorus (Red P) has 2596mAh g thereof-1High theoretical capacity is of great concern. However, the conductivity of red phosphorus is low, and the electrode structure is easily damaged by the stress change caused by the volume expansion of red phosphorus after lithium intercalation, so that the cycling stability is poor, the capacity is not high, and the further application of the red phosphorus is hindered.
Disclosure of Invention
The invention aims to provide a loofah sponge biomass carbon-loaded red phosphorus lithium ion negative electrode material and a preparation method thereof, and the loofah sponge biomass carbon-loaded red phosphorus lithium ion negative electrode material is prepared, and the aims of preparing a battery negative electrode material with large specific capacity and excellent conductivity and cyclicity are achieved by utilizing the theoretical specific capacity of red phosphorus and the conductivity and porous structure of biomass carbon subjected to high-temperature carbonization treatment, so that the problems that the conductivity of red phosphorus is low, and the electrode structure is easily damaged by stress change generated by volume expansion of red phosphorus after lithium intercalation, so that the cycling stability is poor, the capacity is not high and the like are solved, and the technical scheme is as follows:
the loofah sponge biomass carbon-loaded red phosphorus lithium ion negative electrode material and the preparation method thereof specifically comprise the following steps:
(1) cutting loofah sponge, pretreating to remove impurities to obtain pure loofah sponge, drying the pure loofah sponge, fully grinding and weighing to obtain a mixed loofah sponge biomass precursor;
(2) weighing red phosphorus, mixing according to a certain mass ratio to obtain a loofah sponge biomass precursor, and further grinding;
(3) placing the loofah sponge biomass precursor and the red phosphorus mixture in a tubular furnace, introducing gas for protection, and carrying out high-temperature phosphorization on the loofah sponge biomass precursor and the red phosphorus mixture;
(4) cooling the tube furnace to a certain temperature and preserving the temperature for a period of time;
(5) naturally cooling the tubular furnace to room temperature and taking out the tubular furnace to obtain the loofah sponge biomass carbon-loaded red phosphorus composite material;
(6) grinding and uniformly mixing the loofah sponge biomass carbon-loaded red phosphorus composite material, a conductive agent acetylene black and a binder polyvinylidene fluoride (PVDF) according to a certain mass ratio, adding an N-methyl-2-pyrrolidone (NMP) solvent, and uniformly stirring and mixing to obtain battery slurry; respectively dripping the battery slurry on the cut foamed nickel, drying, and punching the foamed nickel into electrode slices serving as electrodes of the lithium ion battery; battery slurry on the foamed nickel and the obtained loofah sponge biomass carbon-loaded red phosphorus lithium ion negative electrode material;
the structure, the morphology and the properties of the red phosphorus and loofah sponge biomass carbon composite battery cathode material obtained by the invention are characterized by means such as an X-ray powder diffractometer (XRD), a Scanning Electron Microscope (SEM) and a Raman spectrometer (Raman); the lithium ion battery is assembled by taking the lithium sheet as the counter electrode to measure the lithium storage electrochemical performance of the cathode material; and standing the assembled lithium ion battery for 24 hours, and then carrying out constant current charge and discharge test, wherein the charge and discharge voltage range is 0.01-3.0V, and the charge and discharge cycle stability and the rate characteristic are cycled in an environment of 25 +/-1 ℃.
As a further scheme of the invention: the particle size of the loofah sponge biomass in the step (1) is controlled to be more than 60 meshes after the loofah sponge biomass and the red phosphorus are mixed and ground.
As a further scheme of the invention: and (3) the gas in the tube furnace in the step (2) is argon.
As a further scheme of the invention: the high-temperature phosphorus infiltration temperature of the mixture of the loofah sponge biomass carbon and the red phosphorus in the step (3) is 500-700 ℃, the high-temperature phosphorus infiltration time of the mixture of the loofah sponge biomass carbon and the red phosphorus is 10-30 min, and the temperature rise rate of the high-temperature phosphorus infiltration of the mixture of the loofah sponge biomass carbon and the red phosphorus is 2-8 ℃/min.
As a still further scheme of the invention: the temperature of the mixture of the loofah sponge biomass carbon and the red phosphorus in the step (4) is 260-300 ℃, and the temperature of the mixture of the loofah sponge biomass carbon and the red phosphorus is 8-16 h.
Compared with the prior art, the invention has the beneficial effects that:
the loofah sponge biomass carbon material is a vascular bundle of mature fruits of loofah, and has the advantages of wide material source, low cost and no pollution; the preparation method of the loofah sponge biomass carbon-loaded red phosphorus lithium ion battery negative electrode material is simple to operate and easy to realize industrial production; according to the prepared loofah sponge biomass carbon-loaded red phosphorus lithium ion battery cathode material, red phosphorus nanoparticles are uniformly embedded in porous biological carbon, the red phosphorus nanoparticles are compatible with the characteristic of high theoretical specific capacity of red phosphorus and the high conductivity of a biomass carbon material after high-temperature carbonization, the red phosphorus nanoparticles improve the conductivity of an electrode material, and the red phosphorus nanoparticles can effectively relieve the problem of volume expansion of red phosphorus in the charging and discharging processes, so that high specific capacity, long cycle stability and excellent rate capability are realized;
according to the invention, the red phosphorus and loofah sponge biomass carbon composite battery cathode material can be prepared simply and massively, the red phosphorus and loofah sponge biomass carbon composite battery cathode material has a stable structure, and the red phosphorus and loofah sponge biomass carbon composite battery cathode material has good lithium storage stability; the invention provides a method for preparing a red phosphorus and loofah sponge biomass carbon composite battery cathode material with great application prospect, and the loofah sponge biomass carbon loaded red phosphorus lithium ion cathode material is combined;
the red phosphorus and the carbon material are compounded to be an effective way for improving/enhancing the electrochemical lithium storage of the red phosphorus cathode, the red phosphorus is embedded into the carbon material with a three-dimensional porous structure, the conductivity of the red phosphorus electrode is increased, and the volume expansion of the red phosphorus electrode in the charge and discharge process can be effectively buffered; the biomass carbon material has the natural advantages of low cost, simple carbonization operation and the like, and the biomass carbon material has the advantages of rich pore structure, large specific surface area, oxygen-containing active groups on the surface of the precursor of the biomass carbon material and the like.
Drawings
Fig. 1 is an XRD spectrogram of a loofah sponge biomass carbon-supported red phosphorus lithium ion negative electrode material and preparation thereof in a preparation method.
Fig. 2 is a Raman spectrum of the loofah sponge biomass carbon-loaded red phosphorus lithium ion negative electrode material and the preparation method thereof.
Fig. 3 is an SEM image of the loofah sponge biomass carbon-supported red phosphorus lithium ion negative electrode material and the preparation method thereof.
Fig. 4 is a circular stability performance diagram of the loofah sponge biomass carbon-loaded red phosphorus lithium ion negative electrode material at a current density of 200mA/g in the preparation method thereof.
Fig. 5 is a rate performance diagram of the loofah sponge biomass carbon-loaded red phosphorus lithium ion negative electrode material and the material in the preparation method thereof circulating under different current densities.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 5, in the embodiment of the invention, a preparation method of the loofah sponge biomass carbon-loaded red phosphorus lithium ion negative electrode material is provided with reference to the following three implementation examples:
first, example 1
The method comprises the following steps of taking red phosphorus and loofah sponge as raw materials, shearing and grinding the loofah sponge, grinding and mixing the loofah sponge and the red phosphorus uniformly according to a certain proportion, and carrying out high-temperature phosphorus infiltration on the red phosphorus and the loofah sponge in an inert atmosphere to prepare the loofah sponge biomass carbon-loaded red phosphorus lithium ion battery cathode material, and specifically comprises the following steps:
(1) shearing the loofah sponge, sequentially cleaning with acetone, deionized water and alcohol to remove impurities to obtain pure loofah sponge, drying the pure loofah sponge, fully grinding and weighing to obtain a loofah sponge biomass precursor;
(2) weighing 0.4g of red phosphorus, mixing the loofah sponge biomass precursor according to the mass ratio of 1:1 to obtain a loofah sponge biomass precursor and red phosphorus mixture, and further fully grinding the loofah sponge biomass precursor and the red phosphorus mixture;
(3) placing the obtained loofah sponge biomass precursor and red phosphorus mixture in a tubular furnace, introducing argon for half an hour, then, at a heating rate of 5 ℃/min, carrying out high-temperature phosphorization on the loofah sponge biomass precursor and red phosphorus mixture at 600 ℃, wherein the phosphorization time is 15min,
(4) cooling the tube furnace to 280 ℃, and preserving the temperature in the tube furnace for 10 hours;
(5) and naturally cooling the tubular furnace to room temperature, and taking out the tubular furnace to obtain the loofah sponge biomass carbon-loaded red phosphorus composite material.
Performing an X-ray diffraction spectrum test on the loofah sponge biomass carbon-loaded red phosphorus composite material prepared in the step (5), wherein the phase of the prepared composite material is a mixed phase of carbon and red phosphorus, and the composite material is free of other impurities, so that the prepared composite material is a red phosphorus/carbon composite material, the red phosphorus/carbon composite material is further analyzed by a Raman spectrometer, a characteristic peak of red phosphorus appears at a position 300 cm-1-500 cm-1 of the Raman spectrometer, but the characteristic peak intensity of the red phosphorus is low, so that the red phosphorus in the red phosphorus/carbon composite material is in a disordered structure, and the scanning electron microscope SEM characterization analysis shows that red phosphorus nanoparticles with the size of 100nm-2 mu m are uniformly embedded on a loofah sponge biomass carbon skeleton with a porous hierarchical structure, so that the red phosphorus/carbon composite material is formed.
Preparing the loofah sponge biomass carbon-loaded red phosphorus lithium ion battery cathode material prepared in the step (5) into battery slurry, wherein the preparation process of the battery slurry is as follows: carrying out mixing on loofah sponge biomass carbon-loaded red phosphorus lithium ion battery negative electrode material, conductive agent acetylene black and binder polyvinylidene fluoride (PVDF) according to the proportion of 80: 10: grinding and uniformly mixing the materials according to the mass ratio of 10, adding an N-methyl-2-pyrrolidone (NMP) solvent, and uniformly stirring and mixing the materials to obtain battery slurry; respectively dripping the battery slurry on the cut foamed nickel, drying, and punching the foamed nickel into electrode slices serving as electrodes of the lithium ion battery; assembling the lithium ion battery: the electrolyte is 1mol of L-1 LiPF6 electrolyte and the volume ratio is 1:1 Ethylene Carbonate (EC) and dimethyl carbonate (DMC), the electrolyte is a lithium sheet used as a counter electrode, and the assembly process of the lithium ion battery is completed in a glove box filled with argon and the water oxygen content is lower than 0.1 ppm; placing the assembled lithium ion battery for 24 hours, and then carrying out constant-current charge and discharge test, wherein the charge and discharge voltage of the lithium ion battery is 0.01V-3.0V; the lithium ion battery is used for circularly measuring the charge-discharge cycle performance, reversible lithium intercalation capacity and high rate characteristic of the battery anode in an environment of 25 +/-1 ℃.
The prepared lithium ion battery is charged and discharged under the current density of 200mA g & lt-1 & gt, the lithium ion battery has the first discharge capacity of 921mAh g & lt-1 & gt, the discharge capacity of the lithium ion battery is still kept above 545mAh & lt-1 & gt after 200 cycles, the coulombic efficiency of the lithium ion battery is kept above 99.5%, and the lithium ion battery shows excellent capacity retention rate and cycle stability; in a rate performance graph of the cathode material prepared by the embodiment of the invention, the red phosphorus/carbon composite material shows excellent rate performance, and the specific capacity of the red phosphorus/carbon composite material reaches 650,530,360,270 and 195mAh g-1 under the current densities of 100, 200, 500, 1000 and 2000mA g-1 respectively; when the current density of the red phosphorus/carbon composite material is reset to 100mA g < -1 >, the capacity of the lithium ion battery returns to 595mAh g < -1 >.
Second, example 2
The method comprises the following steps of taking red phosphorus and loofah sponge as raw materials, grinding and mixing the loofah sponge and the red phosphorus uniformly according to a certain proportion after shearing and grinding the loofah sponge, and carrying out high-temperature phosphorus infiltration on the red phosphorus and the loofah sponge under an inert atmosphere to prepare the loofah sponge biomass carbon-loaded red phosphorus lithium ion battery cathode material, and specifically comprises the following steps:
(1) shearing loofah sponge, sequentially cleaning with acetone, deionized water and alcohol to remove impurities to obtain pure loofah sponge, drying the pure loofah sponge, fully grinding and weighing to obtain loofah sponge biomass precursor;
(2) weighing 2.0g of red phosphorus, mixing the loofah sponge biomass precursor according to the mass ratio of 1:2 to obtain a loofah sponge biomass precursor and red phosphorus mixture, and further fully grinding the loofah sponge biomass precursor and the red phosphorus mixture;
(3) placing the loofah sponge biomass precursor and the red phosphorus mixture in a tubular furnace, introducing argon for half an hour, and then carrying out high-temperature phosphorization on the loofah sponge biomass precursor and the red phosphorus mixture at 600 ℃ at a heating rate of 3 ℃/min, wherein the phosphorization time of the loofah sponge biomass precursor and the red phosphorus mixture is 20 min;
(4) cooling the tube furnace to 280 ℃, and preserving the temperature in the tube furnace for 10 hours;
(5) and naturally cooling the tubular furnace to room temperature, and taking out the tubular furnace to obtain the loofah sponge biomass carbon-loaded red phosphorus composite material.
Preparing the loofah sponge biomass carbon-loaded red phosphorus composite material prepared in the step (5) into battery slurry, wherein the preparation process of the battery slurry is as follows: carrying out mixing on loofah sponge biomass carbon-loaded red phosphorus lithium ion battery negative electrode material, conductive agent acetylene black and binder polyvinylidene fluoride (PVDF) according to the proportion of 80: 10: grinding and uniformly mixing the materials according to the mass ratio of 10, adding an N-methyl-2-pyrrolidone (NMP) solvent, and uniformly stirring and mixing the materials to obtain battery slurry; respectively dripping the battery slurry on the cut foamed nickel, drying, and punching the foamed nickel into an electrode slice serving as an electrode of the lithium ion battery; assembling the lithium ion battery: the electrolyte is 1molL-1 LiPF6 electrolyte and the volume ratio is 1:1 Ethylene Carbonate (EC) and dimethyl carbonate (DMC), the electrolyte is a lithium sheet used as a counter electrode, and the assembly process of the lithium ion battery is completed in a glove box filled with argon and the water oxygen content is lower than 0.1 ppm; placing the assembled lithium ion battery for 24 hours, and then carrying out constant-current charge and discharge test, wherein the charge and discharge voltage of the lithium ion battery is 0.01V-3.0V; the lithium ion battery is used for circularly measuring the charge-discharge cycle performance, reversible lithium intercalation capacity and high rate characteristic of the battery anode in an environment of 25 +/-1 ℃.
The specific capacities of the prepared lithium ion battery under the current densities of 100, 200, 500, 1000 and 2000mA g < -1 > respectively reach 645,535,370,260 and 180mAh g < -1 >; when the current density of the lithium ion battery is reset to 100mA g < -1 >, the capacity of the lithium ion battery returns to 580mAh g < -1 >.
Third, example 3
The method comprises the following steps of taking red phosphorus and loofah sponge as raw materials, grinding and mixing the loofah sponge and the red phosphorus uniformly according to a certain proportion after shearing and grinding the loofah sponge, and carrying out high-temperature phosphorus infiltration on the red phosphorus and the loofah sponge under an inert atmosphere to prepare the loofah sponge biomass carbon-loaded red phosphorus lithium ion battery cathode material, and specifically comprises the following steps:
(1) shearing the loofah sponge, sequentially cleaning with acetone, deionized water and alcohol to remove impurities to obtain pure loofah sponge, drying the pure loofah sponge, fully grinding and weighing to obtain a loofah sponge biomass precursor;
(2) weighing 1.0g of red phosphorus, mixing the loofah sponge biomass precursor according to the mass ratio of 1:3 to obtain a loofah sponge biomass precursor and red phosphorus mixture, and further fully grinding the loofah sponge biomass precursor and the red phosphorus mixture;
(3) placing the loofah sponge biomass precursor and the red phosphorus mixture in a tubular furnace, introducing argon for half an hour, and then carrying out high-temperature phosphorization on the loofah sponge biomass precursor and the red phosphorus mixture at 600 ℃ at a heating rate of 5 ℃/min for 15 min;
(4) cooling the tube furnace to 280 ℃, and preserving the temperature in the tube furnace for 16 hours;
(5) and naturally cooling the tubular furnace to room temperature, and taking out the tubular furnace to obtain the loofah sponge biomass carbon-loaded red phosphorus composite material.
Preparing the loofah sponge biomass carbon-loaded red phosphorus composite material prepared in the step (5) into battery slurry, wherein the preparation process of the battery slurry is as follows: carrying out mixing on loofah sponge biomass carbon-loaded red phosphorus lithium ion battery negative electrode material, conductive agent acetylene black and binder polyvinylidene fluoride (PVDF) according to the proportion of 80: 10: grinding and uniformly mixing the materials according to the mass ratio of 10, adding an N-methyl-2-pyrrolidone (NMP) solvent, and uniformly stirring and mixing the materials to obtain battery slurry; respectively dripping the battery slurry on the cut foamed nickel, drying, and punching the foamed nickel into an electrode slice serving as an electrode of the lithium ion battery; assembling the lithium ion battery: the electrolyte is 1molL-1 LiPF6 electrolyte and the volume ratio is 1:1 Ethylene Carbonate (EC) and dimethyl carbonate (DMC), the electrolyte is a lithium sheet used as a counter electrode, and the assembly process of the lithium ion battery is completed in a glove box filled with argon and the water oxygen content is lower than 0.1 ppm; placing the assembled lithium ion battery for 24 hours, and then carrying out constant-current charge and discharge test, wherein the charge and discharge voltage of the lithium ion battery is 0.01V-3.0V; the lithium ion battery is used for circularly measuring the charge-discharge cycle performance, reversible lithium intercalation capacity and high rate characteristic of the battery anode in an environment of 25 +/-1 ℃.
The specific capacities of the prepared lithium ion battery under the current densities of 100, 200, 500, 1000 and 2000mA g < -1 > respectively reach 640,540,365,260 and 200mAh g < -1 >; when the current density of the lithium ion battery is reset to 100mA g < -1 >, the capacity of the lithium ion battery returns to 600mAh g < -1 >.
The maximum discharge capacities of the lithium ion batteries assembled by the loofah sponge biomass carbon-loaded red phosphorus lithium ion negative electrode materials in the embodiments 1 to 3 under different current densities are shown in table 1, and the following data analysis is obtained:
it will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (6)
1. The loofah sponge biomass carbon-loaded red phosphorus lithium ion negative electrode material comprises red phosphorus and a loofah sponge biomass carbon precursor, and is characterized in that the loofah sponge biomass carbon precursor and the red phosphorus are mixed in a mass ratio of 1: 1-1: 3 to obtain a loofah sponge biomass carbon-loaded red phosphorus composite material, the loofah sponge biomass carbon-loaded red phosphorus composite material is ground and uniformly mixed through a conductive agent acetylene black and a binder polyvinylidene fluoride (PVDF) according to a certain mass ratio, and then an N-methyl-2-pyrrolidone (NMP) solvent is added and uniformly mixed to obtain a battery slurry; respectively dripping the battery slurry on the foamed nickel; battery slurry on the foamed nickel and the obtained loofah sponge biomass carbon-loaded red phosphorus lithium ion negative electrode material.
2. The preparation method of the loofah sponge biomass carbon-loaded red phosphorus lithium ion negative electrode material is characterized by comprising the following steps of:
shearing the loofah sponge, cleaning and pretreating with acetone, deionized water and alcohol to remove impurities to obtain pure loofah sponge, drying the pure loofah sponge, fully grinding and weighing to obtain a loofah sponge biomass precursor;
(2) weighing required red phosphorus, mixing the loofah sponge biomass precursor according to a certain mass ratio to obtain a loofah sponge biomass precursor and red phosphorus mixture, and further grinding the loofah sponge biomass precursor and the red phosphorus mixture;
(3) placing the loofah sponge biomass precursor and the red phosphorus mixture in a tubular furnace and carrying out gas protection, and carrying out high-temperature phosphorization on the loofah sponge biomass precursor and the red phosphorus mixture;
(4) cooling the tube furnace to a certain temperature and preserving the temperature for a period of time;
(5) naturally cooling the tubular furnace to room temperature and taking out the tubular furnace to obtain the loofah sponge biomass carbon-loaded red phosphorus composite material;
(6) grinding and uniformly mixing the loofah sponge biomass carbon-loaded red phosphorus composite material, a conductive agent acetylene black and a binder polyvinylidene fluoride (PVDF) according to a certain mass ratio, adding an N-methyl-2-pyrrolidone (NMP) solvent, and uniformly stirring and mixing to obtain battery slurry; respectively dripping the battery slurry on the cut foamed nickel, drying, and punching the foamed nickel into electrode slices serving as electrodes of the lithium ion battery; battery slurry on the foamed nickel and the obtained loofah sponge biomass carbon-loaded red phosphorus lithium ion negative electrode material.
3. The method for preparing the loofah sponge biomass carbon-loaded red phosphorus lithium ion negative electrode material according to claim 2, wherein the particle size of the loofah sponge biomass and red phosphorus in the step (1) is controlled to be more than 60 meshes after mixing and grinding.
4. The preparation method of the loofah sponge biomass carbon-supported red phosphorus lithium ion negative electrode material according to claim 2, wherein the gas in the tubular furnace in the step (3) is argon.
5. The preparation method of the loofah sponge biomass carbon-loaded red phosphorus lithium ion negative electrode material according to claim 2, wherein the temperature of high-temperature phosphorus infiltration of the loofah sponge biomass carbon-red phosphorus mixture in the step (3) is 500-700 ℃, the time of high-temperature phosphorus infiltration of the loofah sponge biomass carbon-red phosphorus mixture is 10-30 min, and the temperature rise rate of high-temperature phosphorus infiltration of the loofah sponge biomass carbon-red phosphorus mixture is 2-8 ℃/mi.
6. The preparation method of the loofah sponge biomass carbon-loaded red phosphorus lithium ion negative electrode material according to claim 2, wherein the temperature of the mixture of loofah sponge biomass carbon and red phosphorus in the step (4) is 260-300 ℃, and the temperature of the mixture of loofah sponge biomass carbon and red phosphorus is 8-16 h.
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| CN113381014A (en) * | 2021-06-08 | 2021-09-10 | 西安亚弘泰新能源科技有限公司 | Preparation method of ultralow-temperature lithium ion battery negative electrode material |
| CN113644240A (en) * | 2021-07-06 | 2021-11-12 | 杭州电子科技大学 | Preparation method of red phosphorus electrode |
| CN113839026A (en) * | 2021-10-18 | 2021-12-24 | 苏州大学 | Lithium ion battery cathode composite material and preparation method thereof |
| CN115000360A (en) * | 2022-04-22 | 2022-09-02 | 武汉理工大学 | P/SiO X /C composite electrode material and preparation method and application thereof |
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| CN113381014A (en) * | 2021-06-08 | 2021-09-10 | 西安亚弘泰新能源科技有限公司 | Preparation method of ultralow-temperature lithium ion battery negative electrode material |
| CN113644240A (en) * | 2021-07-06 | 2021-11-12 | 杭州电子科技大学 | Preparation method of red phosphorus electrode |
| CN113839026A (en) * | 2021-10-18 | 2021-12-24 | 苏州大学 | Lithium ion battery cathode composite material and preparation method thereof |
| CN113839026B (en) * | 2021-10-18 | 2023-03-24 | 苏州大学 | Lithium ion battery cathode composite material and preparation method thereof |
| CN115000360A (en) * | 2022-04-22 | 2022-09-02 | 武汉理工大学 | P/SiO X /C composite electrode material and preparation method and application thereof |
| CN115000360B (en) * | 2022-04-22 | 2024-04-02 | 武汉理工大学 | P/SiO X Composite electrode material/C and preparation method and application thereof |
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