CN111740084A - Sulfur-doped pre-lithiated silicon-carbon composite material and preparation method thereof - Google Patents
Sulfur-doped pre-lithiated silicon-carbon composite material and preparation method thereof Download PDFInfo
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Abstract
The invention relates to a sulfur-doped pre-lithiated silicon-carbon composite material and a preparation method thereof. The preparation method comprises the following steps: adding an organic sulfur compound into the graphene oxide solution, and uniformly stirring to obtain a solution a; adding organic lithium and an organic solvent into the solution a, sealing and uniformly stirring to obtain a solution b; adding silicon monoxide into the solution b, uniformly stirring, heating and pressurizing to react, filtering, and drying to obtain a composite material intermediate; and (3) putting the composite material intermediate into an inert atmosphere for carbonization, and obtaining the sulfur-doped pre-lithiated silicon-carbon composite material after the carbonization. By doping organic sulfur and organic lithium in the silicon monoxide, the invention forms lithium silicate to improve the first efficiency of the material, and simultaneously forms a-Li-S-structure and a-CO-NH-structure to improve the structural stability and specific capacity of the material and improve the cycle performance of the material.
Description
Technical Field
The invention belongs to the field of lithium ion battery preparation, and particularly relates to a sulfur-doped pre-lithiated silicon-carbon composite material and a preparation method thereof.
Background
With the improvement of the energy density requirement of the lithium ion battery, the negative electrode material is required to have high energy density and electrochemical performance thereof, and the silicon-carbon material is applied to the field of the high energy density battery due to the characteristics of high specific capacity and the like, but the silicon-carbon material has the defects of poor conductivity, large expansion, low initial efficiency, poor cycle and the like, so that the application of the silicon-carbon material is limited.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a sulfur-doped pre-lithiated silicon-carbon composite material and a preparation method thereof. Aiming at the defects of poor electronic conductivity, poor structural stability caused by expansion in the circulation process, poor circulation performance and the like of the existing silicon-carbon material, the invention dopes organic sulfur and organic lithium in the silicon monoxide, and simultaneously forms a structure of Li-S-to improve the structural stability and specific capacity of the material and improve the circulation performance of the material while forming lithium silicate to improve the first efficiency of the material.
The scheme of the invention is to provide a preparation method of a sulfur-doped pre-lithiated silicon-carbon composite material, which comprises the following steps:
(1) adding an organic sulfur compound into the graphene oxide solution, and uniformly stirring to obtain a solution a;
(2) adding organic lithium and an organic solvent into the solution a obtained in the step (1), and sealing and uniformly stirring to obtain a solution b;
(3) adding silicon monoxide into the solution b obtained in the step (2), uniformly stirring, heating and pressurizing to react, filtering, and drying to obtain a composite material intermediate;
(4) and (4) putting the composite material intermediate obtained in the step (3) into an inert atmosphere for carbonization, and obtaining the sulfur-doped pre-lithiation silicon-carbon composite material after the carbonization.
Preferably, in the step (1), the organic sulfur compound is one of methionine, cysteine or 2-mercaptoethanol.
Preferably, in the step (1), the concentration of the graphene oxide solution is 0.1-1 wt.%; the ratio of hydroxyl and carboxyl in the graphene oxide is 0.5-2%.
Preferably, in the step (2), the organolithium is one of methyllithium, lithium n-butoxide, n-butyllithium or tert-butyllithium.
Preferably, in step (2), the organic solvent is N-methylpyrrolidone.
Preferably, the weight ratio of the organic sulfur compound, the graphene oxide, the organic lithium and the organic solvent is 10: 0.1-1: 1-5: 100.
Preferably, the weight ratio of the silicon monoxide to the solution b is 100: 100-500.
Preferably, in the step (3), the heating temperature is 100-200 ℃, the pressurizing pressure is 1-5 Mpa, and the reaction time is 1-24 hours.
Preferably, in the step (4), the carbonization temperature is 800-1100 ℃, and the carbonization time is 1-12 h.
Based on the same technical concept, the invention further provides the sulfur-doped pre-lithiated silicon-carbon composite material prepared by the preparation method.
The design idea of the invention is as follows:
one of the methods for improving the conductivity of the silicon-carbon material is to dope the high-conductivity graphene and other conductivity materials, and simultaneously dope and modify the high-conductivity graphene and other conductivity materials to improve the specific capacity and reduce the expansion of the high-conductivity graphene and other conductivity materials.
The invention has the beneficial effects that:
according to the preparation method of the sulfur-doped pre-lithiated silicon-carbon composite material, the specific capacity of the material is improved and the expansion of the material is reduced by using sulfur, the electronic conductivity of the material is improved by using graphene, the irreversible capacity loss of the material is reduced by using lithium silicate formed by organic lithium and silicon monoxide, and the first efficiency of the composite material is improved. Meanwhile, sulfur in the organic compound and organic lithium form a-Li-S-structure, so that the structural stability of the material can be improved. Through hydrothermal reaction, silicon monoxide can be uniformly doped among compounds with a structure of-Li-S-, and a formed complex has the characteristics of high structural stability, high first-time efficiency, high specific capacity and the like. Meanwhile, the structure of the-CO-NH-structure formed by the acid groups such as hydroxyl, carboxyl and the like on the surface of the graphene oxide and the amino group on the surface of the organic sulfur compound through chemical reaction has the characteristic of stable structure, and the structural stability of the material is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a scanning electron micrograph of a sulfur-doped prelithiated silicon carbon composite prepared in accordance with example 1 of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
Example 1
The embodiment provides a preparation method of a sulfur-doped pre-lithiated silicon-carbon composite material, which comprises the following steps:
(1) adding 10g of methionine into 100g of graphene oxide N-methyl pyrrolidone solution with the concentration of 0.5 wt.%, and uniformly stirring to obtain a solution a; wherein, the ratio of hydroxyl and carboxyl in the graphene oxide is 1 percent.
(2) Adding 3g of tert-butyl lithium and 100g N-methyl pyrrolidone solvent into the solution a obtained in the step (1), and sealing and uniformly stirring to obtain a solution b;
(3) adding 100g of silicon monoxide into 300g of the solution b, uniformly stirring, transferring into a high-pressure reaction kettle, reacting for 12 hours at 180 ℃ and 3Mpa, sequentially filtering, and drying at 80 ℃ for 12 hours to obtain a composite material intermediate;
(4) and (4) transferring the composite material intermediate obtained in the step (3) to a tubular furnace, heating to 900 ℃ at a heating rate of 5 ℃/min in an argon inert atmosphere for carbonization for 6h, and then naturally cooling to room temperature to obtain the sulfur-doped pre-lithiated silicon-carbon composite material.
Example 2
The embodiment provides a preparation method of a sulfur-doped pre-lithiated silicon-carbon composite material, which comprises the following steps:
(1) adding 10g of cysteine into 100g of graphene oxide N-methyl pyrrolidone solution with the concentration of 0.1 wt.%, and uniformly stirring to obtain a solution a; wherein, the ratio of hydroxyl and carboxyl in the graphene oxide is 0.5 percent.
(2) Adding 1g of lithium n-butoxide and 100g of carbon tetrachloride solvent into the solution a obtained in the step (1), and sealing and uniformly stirring to obtain a solution b;
(3) adding 100g of silicon monoxide into 100g of the solution b, uniformly stirring, transferring into a high-pressure reaction kettle, reacting for 24 hours at 100 ℃ and 1Mpa, sequentially filtering, and drying at 80 ℃ for 12 hours to obtain a composite material intermediate;
(4) and (4) transferring the composite material intermediate obtained in the step (3) to a tubular furnace, heating to 800 ℃ at a heating rate of 5 ℃/min in an argon inert atmosphere, carbonizing for 12h, and naturally cooling to room temperature to obtain the sulfur-doped pre-lithiated silicon-carbon composite material.
Example 3
The embodiment provides a preparation method of a sulfur-doped pre-lithiated silicon-carbon composite material, which comprises the following steps:
(1) adding 10g of 2-mercaptoethanol into 100g of graphene oxide N-methylpyrrolidone solution with the concentration of 1 wt.%, and uniformly stirring to obtain a solution a; wherein, the ratio of hydroxyl and carboxyl in the graphene oxide is 2 percent.
(2) Adding 5g of n-butyllithium and 100g of tetrahydrofuran solvent into the solution a obtained in the step (1), and sealing and uniformly stirring to obtain a solution b;
(3) adding 100g of silicon monoxide into 500g of the solution b, uniformly stirring, transferring the solution to a high-pressure reaction kettle, reacting for 1h at 200 ℃ and 5Mpa, sequentially filtering, and drying at 80 ℃ for 12h to obtain a composite material intermediate;
(4) and (4) transferring the composite material intermediate obtained in the step (3) to a tubular furnace, heating to 1100 ℃ at a heating rate of 5 ℃/min in an argon inert atmosphere, carbonizing for 1h, and naturally cooling to room temperature to obtain the sulfur-doped pre-lithiated silicon-carbon composite material.
Comparative example
The comparative example provides a preparation method of a silicon-carbon composite material, comprising the following steps:
adding 100g of silicon monoxide and 100g of graphene oxide N-methyl pyrrolidone solution with the concentration of 1 wt.% into 100g of tetrahydrofuran, uniformly stirring, transferring into a high-pressure reaction kettle, reacting for 12h at the temperature of 180 ℃ and the pressure of 3Mpa, filtering, vacuum drying at the low temperature of 80 ℃ for 12h, transferring into a tubular furnace, heating to 900 ℃ at the heating rate of 5 ℃/min under the inert atmosphere of argon, carbonizing for 6h, and naturally cooling to room temperature to obtain the silicon monoxide/carbon composite material.
Examples of the experiments
(1) Scanning Electron Microscope (SEM) testing
Fig. 1 is an SEM image of the sulfur-doped pre-lithiated silicon-carbon composite material prepared in example 1, and it can be seen from fig. 1 that the sulfur-doped pre-lithiated silicon-carbon composite material of example 1 has a particle size of 5 to 10 μm and a uniform and reasonable size distribution.
(2) Physicochemical property test and button cell performance test
The specific surface area, tap density and powder conductivity of the composite material prepared according to the test examples and comparative examples of the national standard GB/T-245131-2009 graphite cathode materials for lithium ion batteries are shown in Table 1.
The preparation method comprises the following steps of respectively taking the sulfur-doped pre-lithiated silicon-carbon composite material obtained in the examples 1-3 and the silicon monoxide/carbon composite material obtained in the comparative example as negative electrode materials to prepare the pole piece, and specifically comprises the following steps: weighing 9g of negative electrode material, 0.5g of conductive agent SP and 0.5g of LA132 binder, adding the materials into 220ml of deionized water, uniformly stirring, coating on a copper foil to prepare a membrane, and then using a LiPF with a lithium sheet as a negative electrode, a celegard2400 as a membrane and an electrolyte solute of 1mol/L to prepare the LiPF6The button cell is assembled in a glove box with the content of oxygen and water lower than 0.1ppm to form the button cell, the button cell is arranged on a blue tester, the button cell is charged and discharged at the rate of 0.1C, the voltage range is 0.05V-2.0V, and the button cell is stopped after circulation for 3 weeks. The results of the button cell performance tests are shown in table 1.
TABLE 1 comparison of physicochemical and performance test results for button cell
As can be seen from table 1, the sulfur-doped pre-lithiated silicon-carbon composite materials obtained in examples 1 to 3 are superior to comparative examples in terms of the first efficiency and the first discharge capacity thereof, because the pre-lithiation reduces the loss of the irreversible capacity thereof to improve the first efficiency thereof, and the sulfur doping improves the specific capacity thereof; the density of the material can be improved by adopting the hydrothermal reaction, so that the tap density of the material can also be improved; in the sulfur-doped pre-lithiated silicon-carbon composite material obtained in the embodiment, the organic lithium and silicon form lithium silicate, so that the electronic conductivity of the material is improved, and the powder conductivity of the material is improved.
(3) Manufacturing of soft package battery
Sulfur doping as obtained in examples 1 to 3And doping 90% of artificial graphite as a negative electrode material in the pre-lithiated silicon-carbon composite material and the silicon monoxide/carbon composite material obtained in the comparative example, and preparing a negative electrode plate. With ternary materials (LiNi)1/3Co1/3Mn1/ 3O2) As the positive electrode, LiPF6(the solvent is EC + DEC, the volume ratio is 1:1, and the concentration is 1.3mol/l) is used as electrolyte, and celegard2400 is a diaphragm to prepare 5Ah soft package batteries C1, C2, C3 and D. And then testing the cycle performance and the rate capability of each soft package battery and the expansion rate of the pole piece of each soft package battery.
(3.1) Pole piece thickness test
Testing the expansion rate of the pole piece: the method comprises the steps of firstly testing the thickness D1 of a negative pole piece of the soft package battery after constant volume, then circulating for 100 times and fully charging the soft package battery, then testing the thickness D2 of the negative pole piece of the soft package battery after the soft package battery is dissected, and then calculating the expansion rate (D2-D1)/D1. The results are shown in Table 2.
TABLE 2 comparison of pole piece thickness for examples and comparative examples
| D1/μm | D2/μm | Expansion ratio (D2-D1)/D1 | |
| Example 1 | 105 | 137 | 30.5％ |
| Example 2 | 104 | 137 | 31.5％ |
| Example 3 | 106 | 140 | 32.5％ |
| Comparative example | 105 | 148 | 40.5％ |
It can be seen from table 2 that the expansion rate of the negative electrode plate prepared by using the sulfur-doped pre-lithiated silicon-carbon composite material obtained in the example is significantly smaller than that of the comparative example, because the lithium silicate contained in the material of the example can relieve the expansion in the charging and discharging processes, and the chemical bond structures of the-Li-S-and-CO-NH-in the sulfur-doped pre-lithiated silicon-carbon composite material have the advantage of firm combination, and the expansion rate can be reduced.
(3.2) cycle Performance test
And carrying out cycle test on the soft package lithium ion battery under the conditions that the charge and discharge voltage is 2.5-4.2V, the temperature is 25 +/-3.0 ℃ and the charge and discharge multiplying power is 0.5C/0.5C, and the test results are shown in Table 3.
TABLE 3 comparison of the cycles of the examples and comparative examples
| Examples | Initial capacity retention (%) | Capacity retention rate (%). about 500 times |
| Example 1 | 100 | 93.3 |
| Example 2 | 100 | 93.0 |
| Example 3 | 100 | 92.7 |
| Comparative example | 100 | 88.1 |
As can be seen from table 3, the cycle performance of the soft-packed lithium ion battery prepared by using the sulfur-doped pre-lithiated silicon-carbon composite material obtained in the example is superior to that of the comparative example at each stage of the cycle, because the sulfur-doped pre-lithiated silicon-carbon composite material obtained in the example can increase the amount of lithium ions in the charging and discharging process by means of sufficient lithium ions, and the pre-lithiated material structure formed at the same time has a small expansion force, so that the cycle performance of the pre-lithiated silicon-carbon composite material can be improved.
(3.3) Rate Performance test
Conditions of rate performance test: the charging and discharging voltage is 2.5-4.2V, the temperature is 25 +/-3.0 ℃, the charging multiplying factor is 1.0C, and the discharging multiplying factor is 1.0C, 2.0C, 3.0C and 5.0C. The results of the rate performance test are shown in table 4.
TABLE 4 comparison of Rate Properties of examples and comparative examples
It can be seen from table 4 that the rate capability of the soft-packed lithium ion battery using the sulfur-doped pre-lithiated silicon carbon composite material obtained in the example is significantly better than that of the comparative example, because the sulfur-doped pre-lithiated silicon carbon composite material obtained in the example contains lithium silicate, which provides sufficient lithium ions during the charging and discharging process, thereby improving the high rate capability thereof.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. The preparation method of the sulfur-doped prelithiation silicon-carbon composite material is characterized by comprising the following steps of:
(1) adding an organic sulfur compound into the graphene oxide solution, and uniformly stirring to obtain a solution a;
(2) adding organic lithium and an organic solvent into the solution a obtained in the step (1), and sealing and uniformly stirring to obtain a solution b;
(3) adding silicon monoxide into the solution b obtained in the step (2), uniformly stirring, heating and pressurizing to react, filtering, and drying to obtain a composite material intermediate;
(4) and (4) putting the composite material intermediate obtained in the step (3) into an inert atmosphere for carbonization, and obtaining the sulfur-doped pre-lithiation silicon-carbon composite material after the carbonization.
2. The method of claim 1, wherein in step (1), the organic sulfur compound is one of methionine, cysteine, or 2-mercaptoethanol.
3. The method for preparing the sulfur-doped pre-lithiated silicon-carbon composite material according to claim 1, wherein in the step (1), the concentration of the graphene oxide solution is 0.1-1 wt.%; the ratio of hydroxyl and carboxyl in the graphene oxide is 0.5-2%.
4. The method of claim 1, wherein in step (2), the organolithium is one of lithium n-butoxide, n-butyllithium, or tert-butyllithium.
5. The method of claim 1, wherein in step (2), the organic solvent is one of N-methylpyrrolidone, carbon tetrachloride, or tetrahydrofuran.
6. The method for preparing the sulfur-doped prelithiation silicon-carbon composite material according to claim 1, wherein the weight ratio of the organic sulfur compound, the graphene oxide, the organic lithium and the organic solvent is 10: 0.1-1: 1-5: 100.
7. The method for preparing the sulfur-doped prelithiated silicon-carbon composite material according to claim 1, wherein the weight ratio of the silicon monoxide to the solution b is 100: 100-500.
8. The preparation method of the sulfur-doped prelithiated silicon-carbon composite material according to claim 1, wherein in the step (3), the heating temperature is 100-200 ℃, the pressurizing pressure is 1-5 Mpa, and the reaction time is 1-24 hours.
9. The preparation method of the sulfur-doped prelithiation silicon-carbon composite material according to claim 1, wherein in the step (4), the carbonization temperature is 800-1100 ℃ and the carbonization time is 1-12 h.
10. The sulfur-doped pre-lithiated silicon-carbon composite material prepared by the preparation method of any one of claims 1 to 9.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112467114A (en) * | 2020-11-30 | 2021-03-09 | 湖南中科星城石墨有限公司 | Silica composite material, preparation method thereof and lithium ion battery |
| WO2024050714A1 (en) * | 2022-09-07 | 2024-03-14 | 宁德新能源科技有限公司 | Negative electrode sheet, electrochemical device, and electronic device |
Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101047234A (en) * | 2006-03-27 | 2007-10-03 | 信越化学工业株式会社 | Silicon-silicon oxide-lithium composite, preparing method, and non-aqueous electrolyte secondary cell negative electrode material |
| CN102017240A (en) * | 2008-05-07 | 2011-04-13 | 日立麦克赛尔株式会社 | Nonaqueous secondary battery and electronic device |
| WO2013082383A1 (en) * | 2011-12-02 | 2013-06-06 | Brookhaven Science Associates, Llc | POROUS AMORPHOUS GeOx AND ITS APPLICATION AS AN ANODE MATERIAL IN LI-ION BATTERIES |
| WO2013091696A1 (en) * | 2011-12-21 | 2013-06-27 | Lek Pharmaceuticals D.D. | Synthesis of intermediates for preparing anacetrapib and derivatives thereof |
| US20150111106A1 (en) * | 2013-10-18 | 2015-04-23 | Samsung Electronics Co., Ltd. | Positive electrode active material, preparation method thereof, and lithium battery including the same |
| CN104852017A (en) * | 2015-03-17 | 2015-08-19 | 中国科学院广州能源研究所 | Sulfur-doped carbon nanowires, and three-dimensional sulfur-doped carbon nanowire network-silicon composite material and preparation method thereof |
| CN105399079A (en) * | 2014-08-27 | 2016-03-16 | 中国石油化工股份有限公司 | Synthetic method of sulfur-doped graphene |
| US20160254527A1 (en) * | 2012-02-14 | 2016-09-01 | Shailesh Upreti | Composite silicon or composite tin particles |
| CN107275571A (en) * | 2017-08-18 | 2017-10-20 | 华南师范大学 | A kind of full battery of lithium sulfide/nano-silicone wire/carbon and preparation method and application |
| CN107425191A (en) * | 2017-09-11 | 2017-12-01 | 哈尔滨工业大学 | Mesopore silicon oxide/sulphur carbon complex for lithium-sulphur cell positive electrode and preparation method thereof |
| CN107732202A (en) * | 2017-10-16 | 2018-02-23 | 河源广工大协同创新研究院 | A kind of preparation method of lithium sulfur battery anode material |
| CN109473658A (en) * | 2018-12-04 | 2019-03-15 | 清华大学深圳研究生院 | A kind of its lithium ion battery of the preparation method and application of lithium ion battery negative material |
| CN109950492A (en) * | 2019-03-26 | 2019-06-28 | 南京大学射阳高新技术研究院 | A kind of method of In-situ reaction preparation lithium ion battery carbon silicon anode material |
| CN110854379A (en) * | 2019-11-26 | 2020-02-28 | 焦作聚能能源科技有限公司 | Silicon-carbon composite negative electrode material and preparation method thereof, negative electrode plate and lithium ion battery |
| CN111048764A (en) * | 2019-12-23 | 2020-04-21 | 北京理工大学重庆创新中心 | Silicon-carbon composite material and preparation method and application thereof |
| CN111082036A (en) * | 2019-12-31 | 2020-04-28 | 桑顿新能源科技有限公司 | Silicon-coated graphene oxide negative electrode slurry, preparation method thereof, lithium ion battery negative electrode and lithium ion battery |
-
2020
- 2020-06-15 CN CN202010540999.4A patent/CN111740084B/en active Active
Patent Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101047234A (en) * | 2006-03-27 | 2007-10-03 | 信越化学工业株式会社 | Silicon-silicon oxide-lithium composite, preparing method, and non-aqueous electrolyte secondary cell negative electrode material |
| CN102017240A (en) * | 2008-05-07 | 2011-04-13 | 日立麦克赛尔株式会社 | Nonaqueous secondary battery and electronic device |
| WO2013082383A1 (en) * | 2011-12-02 | 2013-06-06 | Brookhaven Science Associates, Llc | POROUS AMORPHOUS GeOx AND ITS APPLICATION AS AN ANODE MATERIAL IN LI-ION BATTERIES |
| WO2013091696A1 (en) * | 2011-12-21 | 2013-06-27 | Lek Pharmaceuticals D.D. | Synthesis of intermediates for preparing anacetrapib and derivatives thereof |
| US20160254527A1 (en) * | 2012-02-14 | 2016-09-01 | Shailesh Upreti | Composite silicon or composite tin particles |
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