CN114975957A - Sulfur/glucose mesoporous carbon sphere lithium sulfur battery positive electrode material and preparation method thereof - Google Patents
Sulfur/glucose mesoporous carbon sphere lithium sulfur battery positive electrode material and preparation method thereof Download PDFInfo
- Publication number
- CN114975957A CN114975957A CN202210710110.1A CN202210710110A CN114975957A CN 114975957 A CN114975957 A CN 114975957A CN 202210710110 A CN202210710110 A CN 202210710110A CN 114975957 A CN114975957 A CN 114975957A
- Authority
- CN
- China
- Prior art keywords
- glucose
- sulfur
- mesoporous carbon
- preparing
- sulfur battery
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
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
- H01M4/362—Composites
-
- 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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/38—Selection of substances as active materials, active masses, active liquids of elements or alloys
-
- 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
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/624—Electric conductive fillers
- H01M4/625—Carbon or graphite
-
- 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
- H01M2004/026—Electrodes composed of, or comprising, active material characterised by the polarity
- H01M2004/028—Positive electrodes
-
- 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 sulfur/glucose mesoporous carbon sphere lithium sulfur battery anode material and a preparation method thereof, relating to the technical field of lithium sulfur batteries, wherein the method comprises the steps of preparing glucose carbon spheres, preparing glucose mesoporous carbon spheres and preparing the lithium sulfur battery anode material; the invention firstly thermally carbonizes glucose water to form glucose carbon spheres, and then adopts a chemical activation method to use ZnCl 2 Etching glucose carbon spheres to synthesize glucose mesoporous carbon spheres, compounding the glucose mesoporous carbon spheres with sulfur by a melting diffusion method to form a positive conductive framework of the lithium-sulfur battery, and having the effects of effectively blocking and adsorbing polysulfide, improving the utilization rate of active substances, inhibiting the shuttle effect of polysulfide and the like, so that the obtained sulfur/glucoseThe glucose mesoporous carbon sphere lithium sulfur battery cathode material shows excellent long-cycle stability and excellent rate performance.
Description
Technical Field
The invention relates to the technical field of lithium-sulfur batteries, in particular to a sulfur/glucose mesoporous carbon sphere lithium-sulfur battery positive electrode material and a preparation method thereof.
Background
With the progress and development of society, the problem of energy shortage and the problem of environmental pollution have become global concerns and need to be solved urgently. The lithium-sulfur battery has higher theoretical specific capacity of 1675mAh g -1 And a very high theoretical energy density of 2600Wh kg -1 And the sulfur storage capacity is large, the cost is low, and the fuel consumption is environment-friendly, so that the lithium-sulfur battery has a very considerable commercial prospect.
However, the development of lithium sulfur batteries still has some problems: 1. the active substance sulfur has poor conductivity and low utilization rate. 2. The interconversion between the active material sulfur and the discharge product polysulfide in the charging and discharging process can cause large volume change, generate electrode structure collapse and influence the cycle stability of the battery. 3. The polysulfide formed is very soluble in the electrolyte and diffuses to the negative electrode, causing a shuttling effect, resulting in capacity fade.
In the prior art, the problem of unsatisfactory electrochemical performance still exists in the process of preparing the lithium-sulfur cathode material, at present, researchers make various researches and attempts to find that the electrochemical performance of the lithium-sulfur battery can be effectively improved by compounding sulfur and a conductive mesoporous carbon material, and after the sulfur and the mesoporous carbon material are compounded, the conductivity of the sulfur cathode material can be improved on one hand; on the other hand, the shuttling effect of polysulfides can be suppressed by physical adsorption. Therefore, the exploration of a porous carbon material with a novel structure, a proper pore diameter and high conductivity as a sulfur positive electrode material has important significance for further research and development of lithium-sulfur batteries.
Disclosure of Invention
In view of the above, the invention provides a sulfur/glucose mesoporous carbon sphere lithium sulfur battery cathode material and a preparation method thereof, and the sulfur/glucose mesoporous carbon sphere lithium sulfur battery cathode material obtained by the method shows excellent long-cycle stability and excellent rate capability.
In order to solve the technical problems, the invention adopts the following technical scheme:
a preparation method of a sulfur/glucose mesoporous carbon sphere lithium sulfur battery positive electrode material comprises the following steps:
(1) preparing glucose carbon spheres: pouring glucose into ultrapure water, carrying out ultrasonic treatment for 15-30min, transferring the glucose into a polytetrafluoroethylene lining of a high-pressure reaction kettle after the glucose is completely dissolved in the ultrapure water, moving the reaction kettle into a blast drying box, carrying out hydrothermal reaction for 10-15h at the temperature of 150-; the glucose carbon spheres obtained in the step (1) are tan;
(2) preparing glucose mesoporous carbon spheres: grinding and mixing the glucose carbon spheres obtained in the step (1) with a certain amount of chemical activating agent, uniformly mixing, pouring into 10-20ml of ultrapure water, magnetically stirring for 24h, then placing into a blast drying box for drying, placing the dried mixture into a tubular furnace for carbonization and activation for 4-8h, wherein the carbonization and activation temperature is 600-;
(3) preparing a lithium-sulfur battery cathode material: and (3) grinding and uniformly mixing the glucose mesoporous carbon spheres obtained in the step (2) and a certain mass of elemental sulfur, putting the mixture into a crucible, putting the crucible into a tube furnace for carbonization for 12-18h, wherein the carbonization temperature is 120-155 ℃, the heating rate is 3-4 ℃/min, and taking out a sample after the temperature of the tube furnace is naturally cooled to room temperature, thus obtaining the sulfur/glucose mesoporous carbon sphere lithium sulfur battery anode material.
In the invention, furthermore, the dosage of the glucose in the step (1) is 3-6g, and the dosage of the ultrapure water is 80-120 mL.
In the invention, further, the sample is washed in the step (1) by adopting the following four steps: firstly, cleaning with deionized water; secondly, absolute ethyl alcohol is adopted for cleaning; then, cleaning by using deionized water; finally, absolute ethyl alcohol is adopted for cleaning.
In the invention, the mass ratio of the glucose carbon spheres and the chemical activating agent in the step (2) is 1: 2-4.
In the invention, further, the chemical activating agent in step (2) is one of zinc chloride, potassium hydroxide and sodium hydroxide.
In the invention, further, the hydrochloric acid in the step (2) is a dilute hydrochloric acid solution with the solution concentration of 5-10 wt%.
In the invention, further, inert gas is used as protective gas in the tube furnace in the steps (2) to (3), and the inert gas is one of nitrogen, argon and helium.
In the invention, further, the mass ratio of the glucose mesoporous carbon spheres to the elemental sulfur in the step (3) is 1: 3-4.
The invention also provides a sulfur/glucose mesoporous carbon sphere lithium sulfur battery anode material prepared by the method.
In summary, due to the adoption of the technical scheme, the invention at least comprises the following beneficial effects:
1. in the invention, the glucose not only has excellent conductivity, but also can be uniformly mixed with a chemical activating agent to prepare a mesoporous carbon material with high specific surface area, the mesoporous structure can improve the loading rate of sulfur, effectively relieve the volume change of a sulfur anode and prevent the structural collapse of an electrode material, and the permeation of electrolyte on the surface of the electrode is enhanced due to the existence of glucose hydrophilic oxygen-containing groups, so that the glucose is used as a main raw material for preparing the mesoporous carbon material; in the preparation process, firstly, glucose is subjected to hydrothermal carbonization to form glucose carbon spheres, then the glucose carbon spheres are etched by using a chemical activating agent by adopting a chemical activation method to synthesize glucose mesoporous carbon spheres, the glucose mesoporous carbon spheres and sulfur are compounded by using a melting diffusion method to form a positive conductive framework of the lithium-sulfur battery, the positive conductive framework has the effects of effectively blocking and adsorbing polysulfide, improving the utilization rate of active substances, inhibiting the shuttle effect of the polysulfide and the like, and the obtained sulfur/glucose mesoporous carbon sphere lithium-sulfur battery positive material shows excellent long-cycle stability and excellent rate performance.
2. The glucose mesoporous carbon spheres have high conductivity and a suitable pore structure, and after the elemental sulfur and the glucose mesoporous carbon spheres are compounded, the rich mesoporous structure and reasonable pore distribution of the carbon material can effectively block sulfur, so that the lithium-sulfur battery cathode material has high sulfur load and provides enough space for volume expansion of sulfur in the charging and discharging processes. In order to better adjust the mesoporous structure, the invention optimizes the mass ratio of the glucose carbon spheres and the chemical active agent in the preparation process, so that the chemical active agent can be more fully mixed with the glucose carbon spheres, and the mesoporous structure of the product can be better regulated and controlled.
3. The high-conductivity glucose mesoporous carbon spheres can promote electron transfer, absorb lithium polysulfide through physical adsorption, and inhibit shuttle effect, so that the prepared sulfur/glucose mesoporous carbon sphere lithium sulfur battery anode material has good electrochemical performance.
4. Electrochemical tests show that the sulfur/glucose mesoporous carbon sphere lithium sulfur battery positive electrode material prepared by the invention has high specific capacity, good rate performance and long cycle stability, and the initial discharge specific capacity of the composite material at 0.1 ℃ is 1396mAh g -1 The discharge specific capacity can still be kept at 1014mAh g after circulating for 100 circles -1 。
Drawings
Fig. 1 is an SEM image of a composite cathode material prepared in example 1 of the present invention;
fig. 2 is a graph comparing electrochemical cycle performance of composite positive electrode materials of examples 1 to 3 of the present invention;
FIG. 3 is a graph comparing electrochemical rate performance of composite positive electrode materials of examples 1 to 3 of the present invention;
fig. 4 is a graph comparing electrochemical cycle performance of composite positive electrode materials of examples 4 to 6 of the present invention;
FIG. 5 is a graph comparing electrochemical rate performance of composite positive electrode materials of example 1 of the present invention and comparative example 1;
fig. 6 is a graph comparing electrochemical cycle performance of composite positive electrode materials of example 1 of the present invention and comparative example 1.
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.
Example 1
The embodiment provides a preparation method of a sulfur/glucose mesoporous carbon sphere lithium sulfur battery positive electrode material, which comprises the following steps:
(1) preparing glucose carbon spheres: pouring 4g of glucose into 80mL of ultrapure water, carrying out ultrasonic treatment for 20min, transferring the glucose into a polytetrafluoroethylene lining of a high-pressure reaction kettle after the glucose is completely dissolved in the ultrapure water, moving the reaction kettle into a blast drying oven, carrying out hydrothermal reaction for 12h at 190 ℃, then naturally cooling to room temperature, and filtering, cleaning and drying a sample obtained after the reaction is finished to obtain a glucose carbon sphere for later use; wherein, the cleaning of the sample is specifically to adopt the following four steps to clean: firstly, cleaning with deionized water; secondly, absolute ethyl alcohol is adopted for cleaning; then, cleaning by using deionized water; finally, absolute ethyl alcohol is adopted for cleaning; the glucose carbon spheres obtained in the step (1) are dark brown;
(2) preparing glucose mesoporous carbon spheres: grinding and mixing 0.8g of glucose carbon spheres obtained in the step (1) with 3.2g of chemical activator zinc chloride, uniformly mixing, pouring into 20ml of ultrapure water, magnetically stirring for 24 hours, then drying in a 70 ℃ blast drying oven, putting the dried mixture into a tubular furnace with nitrogen as protective gas, carbonizing and activating for 6 hours at 600 ℃ and at a heating rate of 3 ℃/min, naturally cooling to room temperature in the tubular furnace, taking out a sample, soaking in 10 wt% of dilute hydrochloric acid solution for 12 hours, filtering and washing with deionized water until the pH is 7, and finally drying the sample for 12 hours in the blast drying oven at 80 ℃ to obtain glucose mesoporous carbon spheres for later use;
(3) preparing a lithium-sulfur battery cathode material: and (3) grinding and uniformly mixing 0.15g of glucose mesoporous carbon spheres obtained in the step (2) with 0.45g of elemental sulfur, putting the mixture into a crucible, carbonizing the mixture in a tubular furnace for 18 hours at the temperature of 155 ℃ at the heating rate of 3 ℃/min, and taking out a sample after the temperature of the tubular furnace is naturally cooled to room temperature to obtain the sulfur/glucose mesoporous carbon sphere lithium sulfur battery cathode material.
The cathode material obtained in this example is described as: 1-190-4; as shown in fig. 1, the SEM image shows that sulfur is uniformly distributed on the surface and inside of the glucose mesoporous carbon spheres.
The applicant uses the obtained cathode material in the preparation of a battery, and the specific preparation method of the battery is as follows:
mixing 0.28g of positive electrode material, 0.04g of acetylene black and 0.08g of PVDF (polyvinylidene fluoride), adding NMP (N-methyl-2-pyrrolidone) as a solvent, stirring to paste, uniformly coating the paste on a copper foil with the thickness of 10 mu m, then putting the copper foil into an air-blowing drying oven for drying for 6h at 60 ℃, transferring the copper foil into a vacuum drying oven for vacuum drying for 12h at 90 ℃, and punching the copper foil into a 16mm circular pole piece by using a manual punching machine, wherein the circular pole piece is used as a positive electrode, a lithium piece is used as a negative electrode, a microporous polypropylene film is used as a diaphragm, 1mol/L of LiPF6/EC (ethylene carbonate) + DMC (dimethyl carbonate) + DEC (diethyl carbonate) is used as an electrolyte, LiPF6 is used as a solute, and the solvent is composed of EC, DMC and DEC in a volume ratio of 1:1: 1: 1; then, a button cell with the simulation model of CR2025 is assembled in a glove box filled with argon, and the button cell is placed in a ventilated place for standing for 12 hours after being sealed.
Example 2:
the present embodiment provides a method for preparing a positive electrode material of a sulfur/glucose mesoporous carbon sphere lithium sulfur battery, which is substantially the same as that in embodiment 1, and is different only in that: in the step (2), the amount of glucose carbon spheres in this example is 0.8g, and the amount of chemical activator zinc chloride is 2.4 g; namely, the mass ratio of the glucose carbon spheres to the chemical activator zinc chloride is 1: 3.
The positive electrode material obtained in this example was written as: 1-190-3.
Example 3:
the present embodiment provides a method for preparing a positive electrode material of a sulfur/glucose mesoporous carbon sphere lithium sulfur battery, which is substantially the same as that in embodiment 1, and is different only in that: in the step (2), the glucose carbon spheres in the embodiment are 0.8g, and the chemical activator zinc chloride is 1.6 g; namely, the mass ratio of the glucose carbon spheres to the chemical activator zinc chloride is 1: 2.
The positive electrode material obtained in this example was written as: 1-190-2.
Example 4:
the present embodiment provides a method for preparing a positive electrode material of a sulfur/glucose mesoporous carbon sphere lithium sulfur battery, which is substantially the same as that in embodiment 1, and is different only in that: in the step (1), the temperature of the hydrothermal reaction is 180 ℃.
The positive electrode material obtained in this example was written as: 2-180-4.
Example 5:
the present embodiment provides a method for preparing a positive electrode material of a sulfur/glucose mesoporous carbon sphere lithium sulfur battery, which is substantially the same as that in embodiment 4, except that: in the step (2), the glucose carbon spheres in the embodiment are 0.8g, and the chemical activator zinc chloride is 2.4 g; namely, the mass ratio of the glucose carbon spheres to the chemical activator zinc chloride is 1: 3.
The positive electrode material obtained in this example was written as: 2-180-3.
Example 6:
the present embodiment provides a method for preparing a positive electrode material of a sulfur/glucose mesoporous carbon sphere lithium sulfur battery, which is substantially the same as that in embodiment 4, except that: in the step (2), the glucose carbon spheres in the embodiment are 0.8g, and the chemical activating agent is 1.6 g; namely, the mass ratio of the glucose carbon spheres to the chemical activator zinc chloride is 1: 2.
The positive electrode material obtained in this example was written as: 2-180-2.
Examples 2-6, electrode preparation, cell assembly and electrochemical testing were the same as in example 1.
The electrochemical tests were carried out at room temperature using a battery tester on the batteries manufactured by the methods of examples 1 to 6. The current density is set to 50mA/g, and the voltage testing range is 0.01-3V.
Electrochemical properties of the cathode materials obtained in comparative examples 1 to 3 were compared, and electrochemical tests showed that glucose carbon spheres prepared in example 1 under hydrothermal conditions of 190 ℃ and zinc chloride at a mass ratio of 1:4, mixing, and chemically activating to obtain the glucose mesoporous carbon spheres and elemental sulfur in a mass ratio of 1:3, wherein the composite cathode material obtained by a melting diffusion method has excellent electrochemical performance, the first discharge specific capacity is 1396mAh/g, the charge transfer resistance is 85 omega, and although the capacity is attenuated after the first charge and discharge, the capacity is gradually stabilized along with the increase of the cycle number, and the charge and discharge efficiency is close to 100%.
In addition, in order to verify the capacity retention rate and the like of the prepared composite cathode material, the rate performance test of the cathode material prepared in the embodiment 1 to the embodiment 3 is also performed, as shown in fig. 3. The results show that: the rate performance of the obtained cathode material is related to the mass ratio of the glucose carbon spheres to the chemical activator zinc chloride, and when the mass ratio of the glucose carbon spheres to the chemical activator zinc chloride is 1:4, the obtained cathode material has the optimal rate performance.
Comparing the electrochemical performances of examples 4 to 6, as shown in fig. 4, the electrochemical tests showed that the long cycle performance of the obtained positive electrode materials was worse than that of the hydrothermal temperature of 190 ℃ when the temperature of the hydrothermal reaction was 180 ℃. Taking 2-180-4 as an example, at 0.1 ℃, the initial discharge specific capacity is 1053mAh/g, and after 100 charge-discharge cycles, the discharge specific capacity is only 533mAh/g, which shows that the optimal hydrothermal temperature of the invention is 190 ℃.
Comparative example 1:
this comparative example provides a method of preparing a positive electrode material for a sulfur/glucose carbon sphere lithium sulfur battery, which is substantially the same as example 1 except that: step (2) is omitted, namely the glucose carbon spheres obtained by the treatment of the step (1) are directly subjected to the material preparation of the step (3).
The positive electrode material obtained in this comparative example was recorded as: a sulfur/glucose carbon sphere composite.
In order to verify the performance effect of the cathode material of the invention, the applicant also compares the cycle performance and rate performance of the cathode materials obtained in example 1 and comparative example 1, as shown in fig. 5 and fig. 6, and the comparison of the data in the figures shows that the cycle performance and rate performance of the cathode material (1-190-4) obtained in example 1 are obviously superior to those of the sulfur/glucose carbon sphere composite material obtained in comparative example 1.
Although the invention has been described in detail hereinabove with respect to a general description and specific embodiments thereof, it will be apparent to those skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, it is intended that all such modifications and alterations be included within the scope of this invention as defined in the appended claims.
Claims (9)
1. A preparation method of a sulfur/glucose mesoporous carbon sphere lithium sulfur battery positive electrode material is characterized by comprising the following steps:
(1) preparing glucose carbon spheres: pouring glucose into ultrapure water, carrying out ultrasonic treatment for 15-30min, transferring the glucose into a polytetrafluoroethylene lining of a high-pressure reaction kettle after the glucose is completely dissolved in the ultrapure water, moving the reaction kettle into a blast drying box, carrying out hydrothermal reaction for 10-15h at the temperature of 150-;
(2) preparing glucose mesoporous carbon spheres: grinding and mixing the glucose carbon spheres obtained in the step (1) with a certain amount of chemical activating agent, uniformly mixing, pouring into 10-20ml of ultrapure water, magnetically stirring for 22-24h, then placing into a blast drying oven for drying, placing the dried mixture into a tubular furnace for carbonization and activation for 4-8h, wherein the carbonization and activation temperature is 600-;
(3) preparing a lithium-sulfur battery cathode material: grinding and uniformly mixing the glucose mesoporous carbon spheres obtained in the step (2) with a certain mass of elemental sulfur, putting the mixture into a crucible, placing the crucible into a tubular furnace for carbonization for 12-18h, wherein the carbonization temperature is 120-155 ℃, the heating rate is 3-4 ℃/min, and taking out a sample after the temperature of the tubular furnace is naturally cooled to room temperature to obtain the sulfur/glucose mesoporous carbon sphere lithium sulfur battery anode material.
2. The method for preparing the positive electrode material of the sulfur/glucose mesoporous carbon sphere lithium sulfur battery as claimed in claim 1, wherein the amount of the glucose used in the step (1) is 3-6g, and the amount of the ultrapure water used is 80-120 mL.
3. The method for preparing the positive electrode material of the sulfur/glucose mesoporous carbon sphere lithium sulfur battery as claimed in claim 1, wherein the step (1) of cleaning the sample specifically comprises the following four steps: firstly, cleaning with deionized water; secondly, absolute ethyl alcohol is adopted for cleaning; then, cleaning by using deionized water; finally, absolute ethyl alcohol is adopted for cleaning.
4. The method for preparing the positive electrode material of the sulfur/glucose mesoporous carbon sphere lithium sulfur battery as claimed in claim 1, wherein the mass ratio of the glucose carbon sphere and the chemical activator in the step (2) is 1: 2-4.
5. The method for preparing the positive electrode material of the sulfur/glucose mesoporous carbon sphere lithium sulfur battery as claimed in claim 1, wherein the chemical activator in step (2) is one of zinc chloride, potassium hydroxide and sodium hydroxide.
6. The method for preparing the positive electrode material of the sulfur/glucose mesoporous carbon sphere lithium sulfur battery as claimed in claim 1, wherein the hydrochloric acid in the step (2) is a dilute hydrochloric acid solution with a solution concentration of 5-10 wt%.
7. The method for preparing the positive electrode material of the sulfur/glucose mesoporous carbon sphere lithium sulfur battery as claimed in claim 1, wherein the inert gas is used as a protective gas in the tube furnace in the steps (2) to (3), and the inert gas is one of nitrogen, argon and helium.
8. The preparation method of the sulfur/glucose mesoporous carbon sphere lithium sulfur battery cathode material as claimed in claim 1, wherein the mass ratio of the glucose mesoporous carbon sphere to elemental sulfur in the step (3) is 1: 3-4.
9. The sulfur/glucose mesoporous carbon sphere lithium sulfur battery cathode material prepared by the method of any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210710110.1A CN114975957A (en) | 2022-06-22 | 2022-06-22 | Sulfur/glucose mesoporous carbon sphere lithium sulfur battery positive electrode material and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210710110.1A CN114975957A (en) | 2022-06-22 | 2022-06-22 | Sulfur/glucose mesoporous carbon sphere lithium sulfur battery positive electrode material and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114975957A true CN114975957A (en) | 2022-08-30 |
Family
ID=82966336
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210710110.1A Pending CN114975957A (en) | 2022-06-22 | 2022-06-22 | Sulfur/glucose mesoporous carbon sphere lithium sulfur battery positive electrode material and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114975957A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117558906A (en) * | 2024-01-11 | 2024-02-13 | 吉林大学 | Positive electrode material and preparation method and application thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150140420A1 (en) * | 2012-05-03 | 2015-05-21 | Iucf-Hyu (Inustry-University Cooperation Foundatio Hanyang University | Method for manufacturing carbon-sulfur composite, carbon-sulfur composite manufactured thereby, and electrochemical device including the same |
| WO2016192389A1 (en) * | 2015-06-03 | 2016-12-08 | 中国地质大学（武汉） | Lithium sulfur battery composite positive electrode material and preparation method thereof |
| CN107572523A (en) * | 2017-09-11 | 2018-01-12 | 桂林电子科技大学 | A kind of classifying porous carbosphere of N doping and its preparation method and application |
| CN109755030A (en) * | 2019-02-08 | 2019-05-14 | 桂林理工大学 | A kind of preparation method and applications of glucosyl group carbon ball/cobalt nickel hydroxide composite material |
| CN113559724A (en) * | 2021-07-12 | 2021-10-29 | 太原理工大学 | Preparation method and application of nitrogen and sulfur co-doped porous carbon sphere mixed matrix membrane |
| CN114289006A (en) * | 2021-12-06 | 2022-04-08 | 上海大学 | For Li-CO2Preparation method and application of battery carbon sphere catalyst |
| US20220112085A1 (en) * | 2019-01-21 | 2022-04-14 | Jinhua Chenyang Technology Co., Ltd. | Hollow carbon sphere with multi-stage pore structure and preparation method therefor |
-
2022
- 2022-06-22 CN CN202210710110.1A patent/CN114975957A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150140420A1 (en) * | 2012-05-03 | 2015-05-21 | Iucf-Hyu (Inustry-University Cooperation Foundatio Hanyang University | Method for manufacturing carbon-sulfur composite, carbon-sulfur composite manufactured thereby, and electrochemical device including the same |
| WO2016192389A1 (en) * | 2015-06-03 | 2016-12-08 | 中国地质大学（武汉） | Lithium sulfur battery composite positive electrode material and preparation method thereof |
| CN107572523A (en) * | 2017-09-11 | 2018-01-12 | 桂林电子科技大学 | A kind of classifying porous carbosphere of N doping and its preparation method and application |
| US20220112085A1 (en) * | 2019-01-21 | 2022-04-14 | Jinhua Chenyang Technology Co., Ltd. | Hollow carbon sphere with multi-stage pore structure and preparation method therefor |
| CN109755030A (en) * | 2019-02-08 | 2019-05-14 | 桂林理工大学 | A kind of preparation method and applications of glucosyl group carbon ball/cobalt nickel hydroxide composite material |
| CN113559724A (en) * | 2021-07-12 | 2021-10-29 | 太原理工大学 | Preparation method and application of nitrogen and sulfur co-doped porous carbon sphere mixed matrix membrane |
| CN114289006A (en) * | 2021-12-06 | 2022-04-08 | 上海大学 | For Li-CO2Preparation method and application of battery carbon sphere catalyst |
Non-Patent Citations (1)
| Title |
|---|
| Q. WANG 等: "ffects of activated carbon spheres with particle sizes derived from glucose by hydrothermal method on the performance of lithium-sulfur batteries", JOURNAL OF OPTOELECTRONICS AND ADVANCED MATERIALS, vol. 22, no. 1, pages 2 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117558906A (en) * | 2024-01-11 | 2024-02-13 | 吉林大学 | Positive electrode material and preparation method and application thereof |
| CN117558906B (en) * | 2024-01-11 | 2024-03-22 | 吉林大学 | Positive electrode material and preparation method and application thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110104630B (en) | Porous carbon composite material for battery diaphragm and preparation method and application thereof | |
| CN109004199B (en) | Preparation method of biomass hard carbon material for negative electrode of sodium-ion battery | |
| CN111403658A (en) | Preparation method of diaphragm with electrocatalysis function and application of diaphragm in lithium-sulfur battery | |
| CN114420938B (en) | Metal oxide amorphous carbon coated hard carbon composite material and preparation method and application thereof | |
| CN112018361B (en) | Carbon cloth loaded carbon coated cobalt selenide nanosheet battery cathode material and preparation thereof | |
| CN113054183A (en) | Preparation method of CoNi bimetal organic framework derived carbon-sulfur composite material | |
| CN110835104A (en) | Preparation method of nitrogen-doped carbon nanosheet, negative electrode active material and dual-ion battery | |
| CN109461906B (en) | Preparation method of lithium-sulfur battery positive electrode material | |
| CN112652749B (en) | Carbon cloth with uniformly distributed cobalt particles and vertical graphene growing thereon and preparation method and application thereof | |
| CN111313111A (en) | Heteroatom-doped carbon/CoS based on metal organic framework derivation2Functional material and application thereof | |
| CN110611084A (en) | Lithium-sulfur secondary battery with long cycle life and 100% coulombic efficiency | |
| CN108711618A (en) | Method for improving cycle stability of lithium-sulfur battery positive electrode material | |
| CN115072703A (en) | Composite negative electrode material and preparation method and application thereof | |
| CN110993365A (en) | Self-growing bimetallic MOF on foamed nickel and derivative electrode material thereof | |
| CN114975957A (en) | Sulfur/glucose mesoporous carbon sphere lithium sulfur battery positive electrode material and preparation method thereof | |
| CN111682168B (en) | Cobalt diselenide particle with core-shell structure and preparation method and application thereof | |
| CN113213443A (en) | Porous nickel-cobalt bimetallic phosphide nanosheet for lithium-sulfur battery, modified diaphragm and preparation method of porous nickel-cobalt bimetallic phosphide nanosheet | |
| CN111470546A (en) | Coating material for functional interlayer of lithium-sulfur battery and preparation method thereof | |
| CN111952553B (en) | Preparation method of sulfur/sisal fiber activated carbon lithium-sulfur battery positive electrode material | |
| CN110165196B (en) | NCM333ZIF-8 composite anode material and preparation method thereof | |
| CN114335476B (en) | Preparation method and application of anode material | |
| CN114520327B (en) | Preparation method and application of mesoporous molybdenum disulfide/carbon composite material | |
| CN114899374B (en) | Composite positive electrode material of lithium-sulfur battery and preparation method thereof | |
| CN115991466B (en) | MOFs derived carbon aerogel, preparation method thereof and application thereof in lithium ion battery | |
| CN117163946B (en) | Nitrogen-oxygen doped porous carbon and preparation method and application thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |