CN114394627A - Preparation method of sodium ion cobalt sulfide nanowire - Google Patents

Preparation method of sodium ion cobalt sulfide nanowire Download PDF

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CN114394627A
CN114394627A CN202111493091.3A CN202111493091A CN114394627A CN 114394627 A CN114394627 A CN 114394627A CN 202111493091 A CN202111493091 A CN 202111493091A CN 114394627 A CN114394627 A CN 114394627A
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sodium
cobalt sulfide
preparing
precursor
nanowire
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王海斌
陈蓝涛
郑永军
瞿忱
卜宗豪
王茂华
钱伟
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Civil Aviation Flight University of China
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    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G51/00—Compounds of cobalt
    • C01G51/30—Sulfides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y40/00—Manufacture or treatment of nanostructures
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/054—Accumulators with insertion or intercalation of metals other than lithium, e.g. with magnesium or aluminium
    • 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
    • H01M4/04—Processes of manufacture in general
    • H01M4/0471—Processes of manufacture in general involving thermal treatment, e.g. firing, sintering, backing particulate active material, thermal decomposition, pyrolysis
    • 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
    • H01M4/366—Composites as layered products
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
    • H01M4/581—Chalcogenides or intercalation compounds thereof
    • H01M4/5815—Sulfides
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
    • H01M4/583—Carbonaceous material, e.g. graphite-intercalation compounds or CFx
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/10—Particle morphology extending in one dimension, e.g. needle-like
    • C01P2004/16—Nanowires or nanorods, i.e. solid nanofibres with two nearly equal dimensions between 1-100 nanometer
    • 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
    • H01M2004/027—Negative electrodes

Abstract

The invention discloses a preparation method of a sodium ion cobalt sulfide nanowire, which comprises the following steps: adding soluble cobalt salt and nitrilotriacetic acid into deionized water, stirring until the soluble cobalt salt and the nitrilotriacetic acid are completely dissolved, and adding isopropanol to obtain a mixed solution; subjecting the mixed solution to hydrothermal treatmentReacting to obtain a Co-NTA precursor after the reaction is finished; adding a Co-NTA precursor and tris (hydroxymethyl) aminomethane into deionized water, performing ultrasonic treatment, adding dopamine hydrochloride, stirring for 24 hours, performing suction filtration, washing, and performing vacuum drying to obtain Co @ PDA powder; performing secondary annealing and vulcanization treatment on the Co @ PDA powder to finally obtain CoS1.097@ C. The stable Co-NTA precursor nanowire is prepared and generated by a simple hydrothermal method, when the stable Co-NTA precursor nanowire is used as a negative electrode material of a sodium ion battery, an electrode prepared by cobalt chloride hexahydrate has better electrochemical performance, and is rich in raw material resources, low in price, simple and convenient to operate and easy to industrially produce.

Description

Preparation method of sodium ion cobalt sulfide nanowire
Technical Field
The invention relates to the technical field of preparation of sodium ion battery materials, in particular to a preparation method of a sodium ion cobalt sulfide nanowire.
Background
The lithium ion battery has the advantages of high capacity, long service life and the like, is highly concerned by broad students, gradually develops to maturity, and is widely applied to portable equipment such as mobile phones, notebook computers, cameras and the like. However, with the mass production of lithium ion batteries and the unbalanced distribution of lithium resources, lithium resources tend to be scarce, and the future development of lithium batteries faces many challenges. In order to solve the problem, researchers find that sodium in the same main group with lithium has similar physicochemical properties, the working principle of the sodium ion battery is very similar to that of the lithium ion battery, the sodium resource is more abundant, the extraction is easy, the price is low, the sodium ion battery is environment-friendly, and the energy storage performance of the sodium ion battery is better, so that the replacement of the lithium ion battery by the sodium ion battery is a necessary trend for future development. The sodium ion battery consists of the following five parts: positive electrode, negative electrode, organic electrolyte, diaphragm and battery shell. The cobalt sulfide is an environment-friendly material, has higher theoretical specific capacity, and can be used as a good sodium ion battery cathode material.
In the prior art, cobalt acetate tetrahydrate, ammonium thioacetate and dopamine hydrochloride are adopted to prepare the three-dimensional pure-phase cobalt sulfide nano microsphere material, but a homogeneous reactor is adopted to carry out mixed solution reaction, the premixing time is difficult to control, the price of the homogeneous reactor is high, the dosage of thioacetamide serving as a reaction material is difficult to control, the cobalt acetate tetrahydrate and the thioacetamide are easy to generate toxic gas in the reaction process, the cobalt acetate tetrahydrate and the thioacetamide are harmful to a water body and cannot be directly discharged into a sewer, the treatment is difficult, and the environmental hazard is large. In the prior art, cobalt nitrate hexahydrate, urea, PVP, P123 and L-cysteine are adopted to prepare the porous cobalt sulfide nanoflower material, but polyvinylpyrrolidone can cause cancers, and a template agent adopted by the technology contains more carbon, so carbon deposition is easy to occur in the roasting process, sodium nitrate hexahydrate has great harm to the environment, water resources are easy to pollute, the treatment is difficult, the operation process of the technology is complex, the yield is low, and the industrial production is not convenient.
Therefore, a preparation process which can reduce the generation of byproducts, reduce the harm to the environment, greatly reduce the synthesis cost and is easy for industrialization is needed.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a preparation method of a sodium ion cobalt sulfide nanowire.
In order to achieve the purpose, the invention provides the following technical scheme: a preparation method of a sodium ion cobalt sulfide nanowire is characterized in that the cobalt sulfide nanowire is of a hollow porous structure, and the diameter of the nanowire is 45-55 nm.
Preferably, the preparation method comprises the following steps:
s1, adding soluble cobalt salt and nitrilotriacetic acid into deionized water, stirring until the soluble cobalt salt and the nitrilotriacetic acid are completely dissolved, and adding isopropanol to obtain a mixed solution;
s2, carrying out hydrothermal reaction on the mixed solution, and obtaining a Co-NTA precursor after the reaction is finished;
s3, adding a Co-NTA precursor and tris (hydroxymethyl) aminomethane into deionized water, performing ultrasonic treatment, adding dopamine hydrochloride, stirring for 24 hours, performing suction filtration, washing, and performing vacuum drying to obtain Co @ PDA powder;
s4, carrying out secondary annealing and vulcanizing treatment on the Co @ PDA powder to finally obtain CoS1.097@C。
Preferably, the molar ratio of the soluble cobalt salt to the nitrilotriacetic acid is 1: 500.
Preferably, the soluble cobalt salt is cobalt chloride hexahydrate.
Preferably, the amount of the isopropanol added in the step S1 is 1/7-1/2 of the mixed solution.
Preferably, the hydrothermal reaction in the step S2 has a reaction temperature of 170 ℃ and 190 ℃ and a reaction time of 24-48 h.
Preferably, the mass ratio of the Co-NTA precursor, the tris (hydroxymethyl) aminomethane and the dopamine hydrochloride in the step S3 is 10:12: 7-10; the ultrasonic time is 40 min.
Preferably, the vacuum drying of step S3 is specifically drying at 60 ℃ for 24 h.
Preferably, the secondary annealing and vulcanizing treatment in step S4 is specifically: heating Co @ PDA powder to 400-600 ℃ in a nitrogen atmosphere, and keeping the temperature for 2 h; after annealing treatment, the temperature of the sample is raised to 400-600 ℃ in the nitrogen atmosphere, and the temperature is kept for 2 h.
Preferably, the temperature rise rate is 1-3 ℃/min.
The invention has the beneficial effects that:
1) the method adopts a soluble cobalt salt material (cobalt chloride hexahydrate material), does not bring harm to the environment if sodium nitrate hexahydrate is adopted, and the sodium nitrate hexahydrate is not easy to generate nanowires;
2) the metal sulfide prepared by the invention has a nanowire hollow porous structure, is coated by a carbon layer, has a rough surface and a larger specific surface area, can effectively relieve volume expansion caused in the charging and discharging process when used as a negative electrode material of a sodium ion battery, keeps the stability of the nanowire structure, shortens the transmission distance of sodium ions, and greatly improves the electrochemical performance of the sodium ion battery;
3) CoS of the invention1.097The @ C sample is prepared through two-step annealing and vulcanization, the generation of byproducts is effectively reduced, the sample can be stably and efficiently prepared, the yield of the sample is high, and the method is environment-friendly.
Drawings
FIG. 1 shows CoS prepared in example 1 of the present invention1.097The XRD diffraction pattern of @ C;
FIG. 2 shows CoS prepared in example 1 of the present invention1.097The scanning electron microscope image of @ C, FIG. 2(a) is a low-magnification scanning electron microscope image, and FIG. 2(b) and FIG. 2(C) are high-magnification scanning electron microscope images;
FIG. 3 shows CoS prepared in example 1 of the present invention1.097Cyclic voltammogram of @ C;
FIG. 4 shows CoS prepared in example 1 of the present invention1.097@ C cycle performance diagram.
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
Firstly, adding 12mmol of cobalt chloride hexahydrate and 6mol of nitrilotriacetic acid into 70mL of deionized water, magnetically stirring until the cobalt chloride hexahydrate and the 6mol of nitrilotriacetic acid are completely dissolved, then adding 10mL of isopropanol to obtain a mixed solution, then transferring the mixed solution into a reaction kettle with 100mL of polytetrafluoroethylene for hydrothermal reaction, and reacting at a fixed reaction temperature of 180 ℃ for 24 hoursAnd h, cooling to room temperature after the reaction is finished, repeatedly washing by using water and ethanol, centrifuging the reactant to obtain a zinc cobaltate precursor, and then drying in vacuum (drying at 60 ℃ for 24 h). And secondly, adding 100mg of zinc cobaltate precursor and 121mg of tris (hydroxymethyl) aminomethane into deionized water, performing ultrasonic treatment for 40 minutes, then adding 70mg of dopamine hydrochloride, stirring for 24 hours, performing suction filtration, washing and vacuum drying on the Co @ PDA sample to obtain Co @ PDA powder. Finally, the powder is placed in a tube furnace in a nitrogen environment with the heating rate of 3 ℃/min, the temperature is kept for 2h at 600 ℃ for calcination, then the annealed sample is placed in the tube furnace in the nitrogen environment with the heating rate of 3 ℃/min, the temperature is kept for 2h at 600 ℃ for vulcanization, and the final sample CoS can be obtained1.097@C。
Example 2
Firstly, 6mmol of cobalt chloride hexahydrate and 3mol of nitrilotriacetic acid are added into 35mL of deionized water, magnetic stirring is carried out until the cobalt chloride hexahydrate and the 3mol of nitrilotriacetic acid are completely dissolved, then 5mL of isopropanol is added to obtain a mixed solution, then the mixed solution is transferred into a reaction kettle with 50mL of polytetrafluoroethylene to carry out hydrothermal reaction, the fixed reaction temperature is 170 ℃ for 48 hours, the reaction is cooled to room temperature after the reaction is finished, a zinc cobaltate precursor is obtained by repeatedly washing with water and ethanol and centrifuging the reaction product, and then vacuum drying is carried out (drying is carried out for 24 hours at 60 ℃). And secondly, adding 100mg of zinc cobaltate precursor and 121mg of tris (hydroxymethyl) aminomethane into deionized water, performing ultrasonic treatment for 40 minutes, then adding 70mg of dopamine hydrochloride, stirring for 24 hours, performing suction filtration, washing and vacuum drying on the Co @ PDA sample to obtain Co @ PDA powder. Finally, the powder is placed in a tube furnace in a nitrogen environment with the heating rate of 1 ℃/min, the temperature is kept for 2h at 400 ℃ for calcination, then the annealed sample is placed in the tube furnace in the nitrogen environment with the heating rate of 1 ℃/min, the temperature is kept for 2h at 400 ℃ for vulcanization, and the final sample CoS can be obtained1.097@C。
Example 3
Firstly, adding 12mmol of cobalt chloride hexahydrate and 6mol of nitrilotriacetic acid into 70mL of deionized water, magnetically stirring until the cobalt chloride hexahydrate and the 6mol of nitrilotriacetic acid are completely dissolved, then adding 10mL of isopropanol to obtain a mixed solution, then transferring the mixed solution into a reaction kettle with 100mL of polytetrafluoroethylene for hydrothermal reaction, fixing the reaction temperature and reacting for 48 hours at 190 ℃,cooling to room temperature after the reaction is finished, repeatedly washing the reaction product by water and ethanol, centrifuging the reaction product to obtain a zinc cobaltate precursor, and then drying the precursor in vacuum (drying for 24 hours at the temperature of 60 ℃). And secondly, adding 100mg of zinc cobaltate precursor and 121mg of tris (hydroxymethyl) aminomethane into deionized water, performing ultrasonic treatment for 40 minutes, then adding 70mg of dopamine hydrochloride, stirring for 24 hours, performing suction filtration, washing and vacuum drying on the Co @ PDA sample to obtain Co @ PDA powder. Finally, the powder is placed in a tubular furnace in a nitrogen environment with the heating rate of 2 ℃/min, the temperature is kept for 2h at 600 ℃ for calcination, then the annealed sample is placed in the tubular furnace in the nitrogen environment with the heating rate of 2 ℃/min, the temperature is kept for 2h at 600 ℃ for vulcanization, and the final sample CoS can be obtained1.097@C。
Example 4
Firstly, adding 12mmol of cobalt chloride hexahydrate and 6mol of nitrilotriacetic acid into 70mL of deionized water, magnetically stirring until the cobalt chloride hexahydrate and the 6mol of nitrilotriacetic acid are completely dissolved, then adding 10mL of isopropanol to obtain a mixed solution, then transferring the mixed solution into a reaction kettle with 100mL of polytetrafluoroethylene for hydrothermal reaction, fixing the reaction temperature for 30h at 180 ℃, cooling to room temperature after the reaction is finished, repeatedly washing with water and ethanol, centrifuging the reactant to obtain a zinc cobaltate precursor, and then drying in vacuum (drying for 24h at 60 ℃). And secondly, adding 100mg of zinc cobaltate precursor and 121mg of tris (hydroxymethyl) aminomethane into deionized water, performing ultrasonic treatment for 40 minutes, then adding 70mg of dopamine hydrochloride, stirring for 24 hours, performing suction filtration, washing and vacuum drying on the Co @ PDA sample to obtain Co @ PDA powder. Finally, the powder is placed in a tube furnace in a nitrogen environment with the heating rate of 3 ℃/min, the temperature is kept for 2h at 500 ℃ for calcination, then the annealed sample is placed in the tube furnace in the nitrogen environment with the heating rate of 3 ℃/min, the temperature is kept for 2h at 500 ℃ for vulcanization, and the final sample CoS can be obtained1.097@C。
The metal sulfide prepared in the embodiment 1 of the invention has a nanowire hollow porous structure, the diameter of the metal sulfide is about 50nm, the metal sulfide is coated by a carbon layer outside, the surface of the metal sulfide is rough, the metal sulfide has a larger specific surface area, when the metal sulfide is used as a negative electrode material of a sodium ion battery, the volume expansion caused in the charge and discharge process can be effectively relieved, the stability of the nanowire structure is maintained, and the transmission distance of sodium ions is shortenedAnd the electrochemical performance of the sodium ion battery is greatly improved. As shown in FIG. 1, is CoS prepared in example 11.097The XRD diffraction pattern of @ C, FIG. 2 is the scanning electron micrograph thereof, it can be seen from FIGS. 1 and 2 that the positions and intensities of the diffraction peaks in FIG. 1 correspond to the cards in FIG. 2 one by one, indicating that the product is CoS1.097@C。
FIG. 3 is CoS prepared in example 11.097In the cyclic voltammogram of @ C, the oxidation peaks at the first turn are at 1.78V and 1.95V, and the reduction peaks at 0.70V and 0.86V. The decrease in the intensity of the peak and the shift in the peak can be clearly seen in the second cycle, suggesting the formation of an SEI film, and the CV curves of the second and third cycles almost coincide, indicating good reversibility of the electrode. The cycling performance is shown in FIG. 4, from which it can be seen that the electrode still has a specific capacity of 340.35mAh/g over 50 cycles at a current density of 0.1A/g. Indicating that the electrode has good cycling stability.
In the invention, a cobalt chloride hexahydrate material is adopted to replace a sodium nitrate hexahydrate material, so that the direct effect is to generate a Co-NTA precursor nanowire, the nanowire is not easy to generate by using the cobalt nitrate hexahydrate material, and the indirect effect is that when the prepared electrode material is used as a negative electrode material of a sodium ion battery, the electrochemical performance of an electrode prepared by using the cobalt chloride hexahydrate material is better, and the cobalt ions in the cobalt chloride hexahydrate material are more easily combined with carboxyl in nitrilotriacetic acid to generate a stable nanowire.
The preparation method provided by the invention has the advantages of rich raw material resources, low price, simple and convenient operation and easy industrial production, the prepared metal sulfide has a nanowire structure, and the obtained nanowire structure can effectively relieve volume expansion caused in the charging and discharging process, shorten the transmission distance of sodium ions, greatly improve the electrochemical performance of the sodium ion battery and has good market prospect.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.

Claims (10)

1. The preparation method of the sodium ion cobalt sulfide nanowire is characterized in that the cobalt sulfide nanowire is of a hollow porous structure, and the diameter of the nanowire is 45-55 nm.
2. The method of preparing the sodium-ion cobalt sulfide nanowires of claim 1, wherein: the preparation method comprises the following steps:
s1, adding soluble cobalt salt and nitrilotriacetic acid into deionized water, stirring until the soluble cobalt salt and the nitrilotriacetic acid are completely dissolved, and adding isopropanol to obtain a mixed solution;
s2, carrying out hydrothermal reaction on the mixed solution, and obtaining a Co-NTA precursor after the reaction is finished;
s3, adding a Co-NTA precursor and tris (hydroxymethyl) aminomethane into deionized water, performing ultrasonic treatment, adding dopamine hydrochloride, stirring for 24 hours, performing suction filtration, washing, and performing vacuum drying to obtain Co @ PDA powder;
s4, carrying out secondary annealing and vulcanizing treatment on the Co @ PDA powder to finally obtain CoS1.097@C。
3. The method of preparing the sodium-ion cobalt sulfide nanowires of claim 2, wherein: the molar ratio of the soluble cobalt salt to the nitrilotriacetic acid is 1: 500.
4. The method of preparing the sodium-ion cobalt sulfide nanowires of claim 2 or 3, wherein: the soluble cobalt salt is cobalt chloride hexahydrate.
5. The method of preparing the sodium-ion cobalt sulfide nanowires of claim 2, wherein: the addition amount of the isopropanol in the step S1 accounts for 1/7-1/2 of the mixed solution.
6. The method of preparing the sodium-ion cobalt sulfide nanowires of claim 2, wherein: the hydrothermal reaction in the step S2 is carried out at the temperature of 170-190 ℃ for 24-48 h.
7. The method of preparing the sodium-ion cobalt sulfide nanowires of claim 2, wherein: in the step S3, the mass ratio of the Co-NTA precursor to the trihydroxymethyl aminomethane to the dopamine hydrochloride is 10:12: 7-10; the ultrasonic time is 40 min.
8. The method of preparing the sodium-ion cobalt sulfide nanowires of claim 2, wherein: the vacuum drying in the step S3 is specifically drying at 60 ℃ for 24 h.
9. The method of preparing the sodium-ion cobalt sulfide nanowires of claim 2, wherein: the secondary annealing and vulcanizing treatment of the step S4 is specifically as follows: heating Co @ PDA powder to 400-600 ℃ in a nitrogen atmosphere, and keeping the temperature for 2 h; after annealing treatment, the temperature of the sample is raised to 400-600 ℃ in the nitrogen atmosphere, and the temperature is kept for 2 h.
10. The method of preparing the sodium-ion cobalt sulfide nanowires of claim 9, wherein: the heating rate is 1-3 ℃/min.
CN202111493091.3A 2021-12-08 2021-12-08 Preparation method of sodium ion cobalt sulfide nanowire Pending CN114394627A (en)

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