CN116553522A - Sodium ion negative electrode material with high specific surface area and preparation method thereof - Google Patents

Sodium ion negative electrode material with high specific surface area and preparation method thereof Download PDF

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Publication number
CN116553522A
CN116553522A CN202310721089.XA CN202310721089A CN116553522A CN 116553522 A CN116553522 A CN 116553522A CN 202310721089 A CN202310721089 A CN 202310721089A CN 116553522 A CN116553522 A CN 116553522A
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sodium ion
negative electrode
specific surface
surface area
electrode material
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赵天宝
刘琥瑜
李志豪
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Chengdu Lithium Energy Technology Co ltd
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Chengdu Lithium Energy Technology Co ltd
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    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B32/00Carbon; Compounds thereof
    • C01B32/05Preparation or purification of carbon not covered by groups C01B32/15, C01B32/20, C01B32/25, C01B32/30
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/05Accumulators with non-aqueous electrolyte
    • H01M10/054Accumulators with insertion or intercalation of metals other than lithium, e.g. with magnesium or aluminium
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00Electrodes
    • H01M4/02Electrodes composed of, or comprising, active material
    • H01M4/13Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • H01M4/133Electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00Electrodes
    • H01M4/02Electrodes composed of, or comprising, active material
    • H01M4/36Selection of substances as active materials, active masses, active liquids
    • H01M4/58Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
    • H01M4/583Carbonaceous material, e.g. graphite-intercalation compounds or CFx
    • H01M4/587Carbonaceous material, e.g. graphite-intercalation compounds or CFx for inserting or intercalating light metals
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01PINDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00Particle morphology
    • C01P2004/01Particle morphology depicted by an image
    • C01P2004/03Particle morphology depicted by an image obtained by SEM
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01PINDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00Physical properties of inorganic compounds
    • C01P2006/40Electric properties
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00Electrodes
    • H01M4/02Electrodes composed of, or comprising, active material
    • H01M2004/021Physical characteristics, e.g. porosity, surface area
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00Electrodes
    • H01M4/02Electrodes composed of, or comprising, active material
    • H01M2004/026Electrodes composed of, or comprising, active material characterised by the polarity
    • H01M2004/027Negative electrodes
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
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  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Battery Electrode And Active Subsutance (AREA)

Abstract

The invention relates to the technical field of hard carbon materials, and provides a sodium ion anode material, which comprises the following steps: after the biomass raw material is crushed and dried, under the protection of inert gas, pre-calcining is carried out at a low temperature and a low temperature rising rate, so as to obtain a pre-calcined product A; then soaking the mixture in an acid solution for a period of time, washing, and drying to obtain a mixture B; then calcining at high temperature to obtain a hard carbon material; the invention also provides a sodium ion battery negative electrode plate comprising the sodium ion negative electrode material and a sodium ion battery comprising the negative electrode plate, and the electrochemical performance of the sodium ion battery is excellent.

Description

Sodium ion negative electrode material with high specific surface area and preparation method thereof
Technical Field
The invention relates to the technical field of sodium ion negative electrode materials, in particular to a sodium ion negative electrode material with high specific surface area, a preparation method thereof, a negative electrode containing the same and a sodium ion battery.
Background
With the increasing serious environmental problems, non-renewable resources are continuously reduced, and searching for new energy sources with safety, no pollution and abundant resources becomes a hot spot for people to study. The sodium element and the lithium element are positioned in the same metal element, and the sodium element is stored in nature abundantly, so the sodium ion battery is expected to become an important replacement product of the lithium ion battery. Precursors of hard carbon materials for sodium ion batteries fall into four broad categories: resin based, biomass based, asphalt based, and coal based. The biomass base has wide sources and low price, and becomes the first choice material of the hard carbon material of the sodium ion battery and the research hot spot.
Biomass is a carbonaceous substance rich in cellulose, hemicellulose and lignin, has good hydrophilicity and porous structure, and can be used as a raw material for preparing porous activated carbon. As disclosed in chinese patent publication No. CN 109004199a, a method for preparing biomass hard carbon material for negative electrode of sodium ion battery is disclosed, which washes biomass material with deionized water and dries in vacuum drying oven; then calcining the obtained material at high temperature in a high-temperature furnace under the atmosphere of protective gas; the temperature is 800-1400 ℃, the calcination time is 2-5h, and the heating rate is 1-10 ℃/min; grinding the obtained material into powder, stirring for 6-12 h in acid or alkali solution with the concentration of 0.5-2M, washing to be neutral by deionized water, and vacuum drying in a vacuum drying oven to obtain the biomass hard carbon material for the negative electrode of the sodium ion battery; however, the temperature rising rate of the biomass curing agent in the first temperature rising stage is relatively high, which is not beneficial to the biomass curing structure, and the relatively good carbon yield is difficult to realize.
Disclosure of Invention
In view of the above, the main content of the invention is to efficiently prepare the sodium ion anode material with high specific surface area, so that the battery has excellent electrochemical performance.
The embodiment of the invention is realized by the following technical scheme:
a sodium ion negative electrode material with high specific surface area comprises the following steps:
s1, after the biomass raw material is crushed and dried, pre-calcining is carried out for 1-3 hours at the temperature rising rate of 1-3 ℃/min under the protection of inert gas (one of nitrogen and argon) to obtain a pre-calcined product A;
s2, soaking the precalcined product A prepared in the step S1 in 0.1-4mol/L acid solution (one or more of hydrochloric acid, nitric acid and sulfuric acid) for 2-5 hours to expose internal gaps, washing with deionized water to remove carbon, and drying to obtain a mixture B; wherein the mass ratio of the precalcination product A to the acid solution is 1:1-4;
s3, putting the mixture B into a calciner again, and calcining at a high temperature in a nitrogen atmosphere to obtain a sodium ion negative electrode material with a high specific surface area; wherein the temperature is 1100-1600 ℃ during high-temperature calcination, and the temperature is raised in a gradient way during high-temperature calcination, and the temperature raising rate is 1-5 ℃/min.
The sodium ion negative electrode material with high specific surface area is prepared by the preparation method, and the obtained sodium ion negative electrode material with high specific surface area is crushed and refined until the particle size is within the range of 1-10 mu m.
Uniformly mixing the obtained sodium ion anode material, a conductive agent (SP) and a binder (CMC, SBR) with a mass ratio of x to y, n (x is 80-95; y is 2-10; m is 1-3.5; n is 2-6.5, preferably 92:3:1.5:3.5) and a certain amount of deionized water, and then coating the mixture on a current collector to prepare a sodium ion battery anode plate;
and applying the obtained negative pole piece of the sodium ion battery to a sodium ion half battery.
Further, biomass raw materials include, but are not limited to, at least one or more of bamboo, straw, lotus seedpod, soybean, algae, bean dregs, wheat straw, corn cob, rice hull, wood, beans, bean hulls, plant roots, stems and leaves, pericarps, fruit hulls, and animal hulls.
In the invention, the pre-calcination treatment is carried out at low temperature and low temperature rising rate. In the process of pre-calcination treatment, cellulose in biomass starts to degrade at 200 ℃ with high efficiency, and in the degradation process, a large number of different oxygen-containing compounds can be generated in the polycondensation process of cellulose macromolecular chains to cause mass loss, and by reducing the temperature rising rate, aromatic rings of cellulose are not easy to crack when calcined at a higher temperature after being dehydrated at 200 ℃, and the structure in a polymerized state can be maintained to reduce the mass loss. The lignin is calcined under the protection gas, so that the pores in the obtained sodium ion negative electrode material are developed, and a large number of pore structures are wrapped in the sodium ion negative electrode material, and the activated lignin after pre-calcination can enable the pores in the sodium ion negative electrode material to be displayed, so that the material with excellent pores and surface structure is obtained.
The technical scheme of the embodiment of the invention has at least the following advantages and beneficial effects:
1. in the invention, biomass raw materials are subjected to pre-calcination treatment at low temperature and low temperature rising rate. In the process of pre-calcination treatment, cellulose in biomass starts to be dehydrated at the temperature lower than 300 ℃ to be solidified, hydroxide groups disappear in the dehydration process to form double bonds and conjugated double bond structures, so that an aromatic ring structure is formed, the aromatic ring structure formed by cellulose is not easy to crack under the low temperature rising rate, the polymerized structure can be maintained, and the loss of carbon quality is reduced; lignin in biomass is subjected to pre-calcination and then acidification activation treatment, so that internal pores can be exposed to form a material with excellent pores and a specific surface structure.
2. The acidification treatment and deionized water washing after pre-calcination can remove part of multi-carbon and carbon atoms contained in biomass, especially impurities which are difficult to remove at high temperature, and further increase the specific surface area and active sites of the material on the basis of maintaining the original framework, so that the interlayer spacing of the material is increased, and the insertion of sodium ions is facilitated, thereby improving the electrochemical performance of the material.
3. The sodium ion negative electrode material prepared by pre-calcining, controlling the temperature and the heating rate and processing after pre-calcining can realize the increase of the carbon yield and the improvement of the electrochemical performance, so that the battery capacity and the multiplying power are excellent after the sodium ion negative electrode material is applied to a sodium ion battery, and the electrochemical performance of the battery is improved.
Drawings
FIG. 1 is a scanning electron microscope image of a sodium ion negative electrode material prepared in example 1 of the present invention;
fig. 2 is a charge-discharge graph of a sodium ion battery prepared in example 1 of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below. The specific conditions are not noted in the examples and are carried out according to conventional conditions or conditions recommended by the manufacturer. The reagents or apparatus used were conventional products commercially available without the manufacturer's attention.
Example 1
The preparation method of the sodium ion negative electrode material with high specific surface area comprises the following steps:
s1, after crushing and drying biomass raw material bamboo, pre-calcining at 200 ℃ for 1h at a heating rate of 1.5 ℃/min under the protection of nitrogen to obtain a pre-calcined product A;
s2, soaking the precalcined product A prepared in the step S1 in 1mol/L hydrochloric acid solution for 3.5 hours, washing with deionized water, and drying to obtain a mixture B; wherein the mass ratio of the precalcination product A to the acid solution is 1:2;
s3, putting the mixture B into a calciner again, heating the mixture B to 1300 ℃ from 1100 ℃ at a heating rate of 3 ℃/min under the nitrogen atmosphere, and calcining the mixture B at a high temperature to obtain a hard carbon material;
s4, refining the obtained hard carbon material, wherein the diameter range is 5 mu m; then uniformly mixing a hard carbon material, a conductive agent (SP) and a binder (CMC, SBR) with a certain amount of deionized water according to a mass ratio of 92:3:1.5:3.5, and coating the mixture on a current collector to prepare a sodium ion battery negative electrode plate; and applying the negative pole piece of the sodium ion battery to the sodium ion half battery.
Example 2
This embodiment differs from embodiment 1 in that: the biomass raw material is straw; in S2, acidification is carried out by using 1mol/L nitric acid solution.
Example 3
This embodiment differs from embodiment 1 in that: the biomass raw material is soybean; in S2, acidification is carried out by using 2mol/L hydrochloric acid solution.
Example 4
This embodiment differs from embodiment 1 in that: the biomass raw material is straw; in S2, acidification is carried out by using 2mol/L nitric acid solution.
Comparative example 1
The difference between this comparative example and example 1 is that: step S1 is not included, i.e. no pre-calcination operation is performed.
Comparative example 2
The difference between this comparative example and example 1 is that: step S2 is not included, i.e. no acidification treatment operation is performed.
Experimental example
The sodium ion negative electrode materials of examples 1 to 4 and comparative examples 1 to 2 were subjected to a correlation performance test, and the test results are shown in table 1;
the assembled sodium-ion batteries of examples 1-4 and comparative examples 1-2 were subjected to electrochemical performance testing at a current density of 25mAg -1 The voltage range was 0-3V and the test results are shown in table 2.
TABLE 1 sodium ion negative electrode Material Properties of examples 1-4 and comparative examples 1-2
Table 2 electrochemical properties of assembled sodium-ion batteries of examples 1-4 and comparative examples 1-2
As can be seen from the data in tables 1 and 2: according to the invention, through the pre-calcination treatment, the carbon yield of the material is greatly increased; by the acidification treatment after pre-calcination, the biomass carbon can further increase the specific surface area and the interlayer spacing of the material on the basis of maintaining the original carbon skeleton, so that sodium ions are more easily embedded/extracted, and the capacity of the material is improved.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A preparation method of a sodium ion negative electrode material with high specific surface area is characterized by comprising the following steps: the method comprises the following steps:
s1, after the biomass raw material is crushed and dried, pre-calcining is carried out at a gradient heating rate under the protection of inert gas, so as to obtain a pre-calcined product A;
s2, soaking the precalcined product A prepared in the S1 in a pure acid solution for a period of time to expose internal gaps, washing to remove carbon, and drying to obtain a mixture B;
and S3, calcining the mixture B at a high temperature to obtain the sodium ion negative electrode material with a high specific surface area.
2. The method for preparing a sodium ion negative electrode material with a high specific surface area according to claim 1, wherein in S1, when pre-calcining: the precalcination temperature is 200-300 ℃; the pre-calcination time is 1-3h; the temperature rising rate is 1-3 ℃/min.
3. The method for preparing a sodium ion negative electrode material with a high specific surface area according to claim 1, wherein in S1, the inert gas is nitrogen or argon.
4. The method for preparing a sodium ion negative electrode material with high specific surface area according to claim 1, wherein in S2, the acid solution is one or more selected from hydrochloric acid, nitric acid and sulfuric acid;
and/or the concentration of the acid solution is 0.1-4mol/L.
5. The method for preparing a sodium ion negative electrode material with high specific surface area according to claim 4, wherein in S2, the mass ratio of the pre-calcined product A to the acid solution is 1:1-4;
and/or soaking for 2-5h.
6. The method for preparing a sodium ion negative electrode material with a high specific surface area according to claim 1, wherein in S3, the temperature is 1100-1600 ℃ during high-temperature calcination.
7. The method for preparing a sodium ion negative electrode material with high specific surface area according to claim 6, wherein in S3, gradient heating is performed during high-temperature calcination, and the heating rate is 1-5 ℃/min.
8. A sodium ion negative electrode material with a high specific surface area, which is characterized by being prepared by the preparation method of any one of claims 1 to 7.
9. A negative electrode of a sodium ion battery, characterized by comprising the high specific surface area sodium ion negative electrode material of claim 8; the adhesive also comprises a conductive agent and a binder; the mass ratio of the hard carbon material to the conductive agent to the binder is 80-95: 2-10: 1 to 3.5:2 to 6.5.
10. A sodium ion battery comprising the negative electrode of claim 9.
CN202310721089.XA 2023-06-16 2023-06-16 Sodium ion negative electrode material with high specific surface area and preparation method thereof Pending CN116553522A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116995231A (en) * 2023-09-25 2023-11-03 宁德时代新能源科技股份有限公司 Carbon material and preparation method thereof, negative electrode plate, secondary battery and power utilization device
CN117326546A (en) * 2023-11-24 2024-01-02 成都锂能科技有限公司 Lignin-phenolic resin-based hard carbon material and preparation method and application thereof

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109081342A (en) * 2018-08-03 2018-12-25 成都城电电力工程设计有限公司 A kind of biomass porous active carbon of nipa palm leaf and its preparation method and application
CN111847418A (en) * 2019-04-24 2020-10-30 香港理工大学深圳研究院 Preparation method and application of biomass hard carbon for negative electrode material of sodium-ion battery
CN113113602A (en) * 2021-04-06 2021-07-13 常德速碳新能源科技有限公司 Hard carbon negative electrode material for lithium ion secondary battery and preparation method thereof
CN113206246A (en) * 2021-04-27 2021-08-03 天津理工大学 Biomass hard carbon negative electrode material of sodium ion battery and preparation method thereof
CN113651307A (en) * 2021-08-09 2021-11-16 天津理工大学 Sodium ion battery carbon negative electrode material prepared based on waste wood chips and preparation method thereof
CN113889625A (en) * 2021-09-28 2022-01-04 上海普澜特夫精细化工有限公司 Modified hard carbon composite material and preparation method and application thereof
CN115231547A (en) * 2022-07-22 2022-10-25 华南理工大学 Preparation method of hypha-based biomass hard carbon negative electrode material
CN116169238A (en) * 2022-12-20 2023-05-26 深圳市翔丰华科技股份有限公司 Hard carbon negative electrode material for sodium ion battery and preparation method thereof
CN116177520A (en) * 2022-09-09 2023-05-30 广东容钠新能源科技有限公司 High-performance hard carbon negative electrode material for low-temperature sodium ion battery and preparation method thereof

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109081342A (en) * 2018-08-03 2018-12-25 成都城电电力工程设计有限公司 A kind of biomass porous active carbon of nipa palm leaf and its preparation method and application
CN111847418A (en) * 2019-04-24 2020-10-30 香港理工大学深圳研究院 Preparation method and application of biomass hard carbon for negative electrode material of sodium-ion battery
CN113113602A (en) * 2021-04-06 2021-07-13 常德速碳新能源科技有限公司 Hard carbon negative electrode material for lithium ion secondary battery and preparation method thereof
CN113206246A (en) * 2021-04-27 2021-08-03 天津理工大学 Biomass hard carbon negative electrode material of sodium ion battery and preparation method thereof
CN113651307A (en) * 2021-08-09 2021-11-16 天津理工大学 Sodium ion battery carbon negative electrode material prepared based on waste wood chips and preparation method thereof
CN113889625A (en) * 2021-09-28 2022-01-04 上海普澜特夫精细化工有限公司 Modified hard carbon composite material and preparation method and application thereof
CN115231547A (en) * 2022-07-22 2022-10-25 华南理工大学 Preparation method of hypha-based biomass hard carbon negative electrode material
CN116177520A (en) * 2022-09-09 2023-05-30 广东容钠新能源科技有限公司 High-performance hard carbon negative electrode material for low-temperature sodium ion battery and preparation method thereof
CN116169238A (en) * 2022-12-20 2023-05-26 深圳市翔丰华科技股份有限公司 Hard carbon negative electrode material for sodium ion battery and preparation method thereof

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
陶毓博等: "碳化工艺对木陶瓷性能影响的研究", 《材料热处理学报》, vol. 28, no. 6, pages 2 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116995231A (en) * 2023-09-25 2023-11-03 宁德时代新能源科技股份有限公司 Carbon material and preparation method thereof, negative electrode plate, secondary battery and power utilization device
CN116995231B (en) * 2023-09-25 2024-04-09 宁德时代新能源科技股份有限公司 Carbon material and preparation method thereof, negative electrode plate, secondary battery and power utilization device
CN117326546A (en) * 2023-11-24 2024-01-02 成都锂能科技有限公司 Lignin-phenolic resin-based hard carbon material and preparation method and application thereof
CN117326546B (en) * 2023-11-24 2024-02-06 成都锂能科技有限公司 Lignin-phenolic resin-based hard carbon material and preparation method and application thereof

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