CN111777104A - Preparation method of lithium nickel cobalt manganese oxide positive electrode material of lithium ion battery - Google Patents
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- CN111777104A CN111777104A CN202010579934.0A CN202010579934A CN111777104A CN 111777104 A CN111777104 A CN 111777104A CN 202010579934 A CN202010579934 A CN 202010579934A CN 111777104 A CN111777104 A CN 111777104A
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- C—CHEMISTRY; METALLURGY
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- C01G53/00—Compounds of nickel
- C01G53/40—Nickelates
- C01G53/42—Nickelates containing alkali metals, e.g. LiNiO2
- C01G53/44—Nickelates containing alkali metals, e.g. LiNiO2 containing manganese
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- H—ELECTRICITY
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- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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- H—ELECTRICITY
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
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- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/50—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese
- H01M4/505—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
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- H—ELECTRICITY
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
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- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/52—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron
- H01M4/525—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
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Abstract
The invention discloses a preparation method of a lithium ion battery nickel cobalt lithium manganate positive electrode material, which comprises the steps of firstly using Co3O4/SnO2The nano hollow tube is used as a template agent, the primary particles are nucleated, grown and assembled on the nano hollow tube by a chemical coprecipitation method to form a modified nickel cobalt manganese precursor, and then the modified nickel cobalt manganese precursor is mixed with a lithium source, ball-milled and sintered to obtain the lithium nickel cobalt manganese oxide cathode material of the lithium ion battery. The method for preparing the lithium ion battery nickel cobalt lithium manganate cathode material is simple, the raw materials are rich, the energy consumption is low, the production process is safe and reliable, the production cost is low, the large-scale production is easy, and the prepared cathode material can effectively improve the cycling stability of the battery.
Description
Technical Field
The invention relates to the technical field of preparation of positive electrode materials, in particular to a preparation method of a nickel cobalt lithium manganate positive electrode material of a lithium ion battery.
Background
Lithium ionThe battery has the advantages of high specific energy density and long cycle life, and has become the most potential power source, while the positive electrode material is used as an important component of the lithium ion battery, and the performance of the positive electrode material directly determines the performance of the whole battery system, namely the nickel cobalt lithium manganate positive electrode material (LiMO)2M ═ Ni, Co, Mn) fused with LiNiO2、LiCoO2、LiMnO2Has the advantages of high capacity, good rate performance and low cost, can be applied to hybrid electric vehicles, plug-in hybrid electric vehicles and electric vehicles, and is considered as the most promising positive electrode material. LiMO2As the content of nickel increases, the energy density of the (M ═ Ni, Co, Mn) positive electrode material also increases, but the cycle performance and safety performance decrease.
Disclosure of Invention
Based on the technical problems in the background art, the invention provides a preparation method of a lithium nickel cobalt manganese oxide positive electrode material of a lithium ion battery.
The invention provides a preparation method of a lithium nickel cobalt manganese oxide positive electrode material of a lithium ion battery, which comprises the following steps:
s1, weighing nickel salt, cobalt salt and manganese salt according to the chemical formula of the nickel-cobalt-manganese precursor, and dissolving the nickel salt, the cobalt salt and the manganese salt in water to obtain a salt solution;
s2, adding a template agent into the salt solution, and uniformly dispersing to obtain a salt solution containing the template agent, wherein the template agent is Co3O4/SnO2A nano hollow tube;
s3, mixing the salt solution containing the template agent with an ammonia water solution and a precipitator solution, stirring for reaction, and aging, centrifuging, washing and drying to obtain a modified nickel-cobalt-manganese precursor;
and S4, mixing the modified nickel-cobalt-manganese precursor with a lithium source, ball-milling and sintering to obtain the lithium nickel-cobalt-manganese acid lithium positive electrode material of the lithium ion battery.
Preferably, the Co3O4/SnO2The inner diameter of the nano hollow tube is 100-300 nm, the wall thickness is 10-30 nm, and the length-diameter ratio is 10-50.
Preferably, the concentration of the template agent in the salt solution containing the template agent is 0.1-7.0 mg/mL.
Preferably, the concentration of the salt solution is 1.0-3.5 mol/L, the nickel salt is nickel sulfate, the cobalt salt is cobalt sulfate, and the manganese salt is manganese sulfate; the concentration of the ammonia water solution is 0.1-1.5 mol/L; the concentration of the precipitant solution is 1.0-7.5 mol/L, wherein the precipitant is sodium carbonate, sodium hydroxide or a combination thereof.
Preferably, in the step S4, the reaction pH is 7.0-12.0, the stirring speed is 300-1500 rpm, the reaction temperature is 50-60 ℃, and the reaction time is 8-12 h; preferably, in the step S4, the salt solution containing the template, the ammonia solution, and the precipitant solution are added into the reaction kettle in parallel for reaction, and the liquid inlet rate is 10 to 25 ml/min.
Preferably, in the step S3, the aging time is 3-24 h, the centrifugal rotation speed is 2000-6000 rpm, and the centrifugal time is 3-15 min; in step S3, the sintering method specifically includes: sintering at 400-600 ℃ for 5-15 h, and sintering at 700-900 ℃ for 10-20 h.
Preferably, the nickel-cobalt-manganese precursor is NixCoyMn1-x-y(OH)2、NixCoyMn1-x-yCO3Or a combination thereof, wherein x is more than or equal to 0.6 and less than or equal to 1.0, and y is more than or equal to 0 and less than or equal to 0.4.
Preferably, the ratio of the total amount of metal ions in the modified nickel-cobalt-manganese precursor to the amount of lithium ions in the lithium source is 1 (0.95-1.15).
Preferably, the lithium source is Li2CO3LiOH or CH3One or more of COOLi.
A lithium nickel cobalt manganese oxide positive electrode material of a lithium ion battery is prepared by the preparation method.
The invention has the following beneficial effects:
the rapid capacity decay of the lithium nickel cobalt manganese oxide cathode material is mainly attributed to the transformation of H2 to H3 phase when the battery is charged to 4.2V, a plurality of microcracks are generated inside particles due to the transformation of a crystal structure, and the existence of the microcracks accelerates the penetration of electrolyte into the particles and the electrolysis penetrating into the materialLiquid and unstable Ni4+The reaction forms NiO halite heterophases, thereby increasing the impedance of the cell.
Based on this, the present invention employs Co3O4/SnO2The nanometer hollow pipe is used as a template, primary particles are nucleated, grown and assembled on the nanometer hollow pipe through a chemical coprecipitation method to form a nickel-cobalt-manganese precursor with the composite as the template, and the template agent forms LiCoO after solid phase sintering2/SnO2The nano hollow tube plays a supporting role in the material and has the characteristic of a reinforcement body, so that the structure of the material can be stabilized; furthermore, the LiCoO prepared by the present invention2/SnO2The nano hollow tube is used as the nickel cobalt lithium manganate anode material of the template, the existence of the template can reduce the generation of microcracks in the material in the circulating process, and simultaneously slow down the increase of impedance, and the existence of lithium cobaltate can further improve the circulating stability of the material.
The method for preparing the lithium ion battery nickel cobalt lithium manganate cathode material by the template method is simple, rich in raw materials, low in energy consumption, safe and reliable in production process, low in production cost and easy for large-scale production.
Drawings
FIG. 1 is a graph showing the magnification at 0.2C, 0.33C, 1C, 0.2C and 50 cycles at 1C for example 1 and comparative example 1 of the present invention.
Detailed Description
The technical solution of the present invention will be described in detail below with reference to specific examples.
Example 1
A preparation method of a lithium nickel cobalt manganese oxide positive electrode material of a lithium ion battery comprises the following steps:
s1, weighing nickel sulfate, cobalt sulfate and manganese sulfate according to a molar ratio of 85:10:5, and dissolving in water to obtain a salt solution with a concentration of 2.0 mol/L;
s2, adding a template agent into the salt solution, and performing ultrasonic dispersion uniformly to obtain the salt solution containing the template agent, wherein the template agent is Co with the inner diameter of 100-300 nm, the wall thickness of 10-30 nm and the length-diameter ratio of 10-503O4/SnO2Nano hollow tubeThe concentration of the template agent is 0.5 mg/ml;
s3, adding the salt solution containing the template agent, an ammonia water solution with the concentration of 0.5mol/L and a sodium hydroxide solution with the concentration of 4.0mol/L into a 20L stainless steel reaction kettle in a concurrent flow manner for stirring reaction, wherein the pH value of the reaction is 11.0, the stirring speed is 800rpm, the reaction temperature is 55 ℃, the liquid inlet speed is 15ml/min, the reaction time is 10h, and aging, centrifuging, washing and drying are carried out to obtain the modified Ni0.85Co0.1Mn0.05An OH precursor, wherein the aging time is 24h, the centrifugal rotation speed is 3500rpm, and the centrifugal time is 5 min;
s4, modification of Ni0.85Co0.1Mn0.05Mixing the OH precursor with lithium hydroxide, ball-milling and sintering to obtain the lithium nickel cobalt manganese oxide positive electrode material of the lithium ion battery, wherein the modified Ni0.85Co0.1Mn0.05The ratio of the total amount of metal ions in the OH precursor to the amount of lithium in the lithium hydroxide is 1:1.03, and the sintering step is as follows: firstly, sintering at 600 ℃ for 8h, and then sintering at 780 ℃ for 12 h.
Example 2
A preparation method of a lithium nickel cobalt manganese oxide positive electrode material of a lithium ion battery comprises the following steps:
s1, weighing nickel sulfate, cobalt sulfate and manganese sulfate according to a molar ratio of 85:10:5, and dissolving in water to obtain a salt solution with a concentration of 2.0 mol/L;
s2, adding a template agent into the salt solution, and performing ultrasonic dispersion uniformly to obtain the salt solution containing the template agent, wherein the template agent is Co with the inner diameter of 100-300 nm, the wall thickness of 10-30 nm and the length-diameter ratio of 10-503O4/SnO2The concentration of the template agent is 1.5 mg/ml;
s3, adding the salt solution containing the template agent, an ammonia water solution with the concentration of 0.5mol/L and a sodium hydroxide solution with the concentration of 4.0mol/L into a 20L stainless steel reaction kettle in a concurrent flow manner for stirring reaction, wherein the pH value of the reaction is 11.0, the stirring speed is 800rpm, the reaction temperature is 55 ℃, the liquid inlet speed is 15ml/min, the reaction time is 10h, and the modified Ni is obtained by aging, centrifuging, washing, and vacuum drying for 24h at 110 ℃ to obtain the modified Ni0.85Co0.1Mn0.05An OH precursor, wherein the aging time is 24h, the centrifugal rotation speed is 3500rpm, and the centrifugal time is 5 min;
s4, modification of Ni0.85Co0.1Mn0.05Mixing the OH precursor with lithium hydroxide, ball-milling and sintering to obtain the lithium nickel cobalt manganese oxide positive electrode material of the lithium ion battery, wherein the modified Ni0.85Co0.1Mn0.05The ratio of the total mass of metal ions in the OH precursor to the mass of lithium in the lithium hydroxide is 1:1.01, and the sintering step is as follows: firstly, sintering at 600 ℃ for 8h, and then sintering at 780 ℃ for 12 h.
Example 3
A preparation method of a lithium nickel cobalt manganese oxide positive electrode material of a lithium ion battery comprises the following steps:
s1, weighing nickel sulfate, cobalt sulfate and manganese sulfate according to the molar ratio of 6:2:2, and dissolving in water to obtain a salt solution with the concentration of 2.5 mol/L;
s2, adding a template agent into the salt solution, and performing ultrasonic dispersion uniformly to obtain the salt solution containing the template agent, wherein the template agent is Co with the inner diameter of 100-300 nm, the wall thickness of 10-30 nm and the length-diameter ratio of 10-503O4/SnO2The concentration of the template agent is 3 mg/ml;
s3, adding the salt solution containing the template agent, an ammonia water solution with the concentration of 0.3mol/L and a sodium carbonate solution with the concentration of 2.5mol/L into a 20L stainless steel reaction kettle in a concurrent flow manner for stirring reaction, wherein the pH value of the reaction is 8.0, the stirring speed is 800rpm, the reaction temperature is 50 ℃, the liquid inlet speed is 18ml/min, the reaction time is 10h, and the modified Ni is obtained by aging, centrifuging, washing, and vacuum drying for 24h at 110 ℃ to obtain the modified Ni0.6Co0.2Mn0.2CO3Precursor, wherein the aging time is 24h, the centrifugal rotation speed is 4000rpm, and the centrifugal time is 4 min;
s4, modification of Ni0.85Co0.1Mn0.05Mixing the OH precursor with lithium hydroxide, ball-milling and sintering to obtain the lithium nickel cobalt manganese oxide positive electrode material of the lithium ion battery, wherein the modified Ni0.85Co0.1Mn0.05Metal ions in OH precursorsThe ratio of the total material amount of the particles to the material amount of lithium in the lithium hydroxide is 1:1.05, and the sintering step is as follows: the sintering is carried out for 8h under the heat preservation of 500 ℃ and then for 12h under the heat preservation of 850 ℃.
Example 4
A preparation method of a lithium nickel cobalt manganese oxide positive electrode material of a lithium ion battery comprises the following steps:
s1, weighing nickel sulfate, cobalt sulfate and manganese sulfate according to the molar ratio of 6:2:2, and dissolving in water to obtain a salt solution with the concentration of 2.5 mol/L;
s2, adding a template agent into the salt solution, and performing ultrasonic dispersion uniformly to obtain the salt solution containing the template agent, wherein the template agent is Co with the inner diameter of 100-300 nm, the wall thickness of 10-30 nm and the length-diameter ratio of 10-503O4/SnO2The concentration of the template agent is 6 mg/ml;
s3, adding the salt solution containing the template agent, an ammonia water solution with the concentration of 0.3mol/L and a sodium carbonate solution with the concentration of 2.5mol/L into a 20L stainless steel reaction kettle in a concurrent flow manner for stirring reaction, wherein the pH value of the reaction is 8.0, the stirring speed is 800rpm, the reaction temperature is 50 ℃, the liquid inlet speed is 18ml/min, the reaction time is 10h, and the modified Ni is obtained by aging, centrifuging, washing, and vacuum drying for 24h at 110 ℃ to obtain the modified Ni0.6Co0.2Mn0.2CO3Precursor, wherein the aging time is 24h, the centrifugal rotation speed is 4000rpm, and the centrifugal time is 4 min;
s4, modification of Ni0.85Co0.1Mn0.05Mixing the OH precursor with lithium hydroxide, ball-milling and sintering to obtain the lithium nickel cobalt manganese oxide positive electrode material of the lithium ion battery, wherein the modified Ni0.85Co0.1Mn0.05The ratio of the total mass of metal ions in the OH precursor to the mass of lithium in the lithium hydroxide is 1:1.07, and the sintering step is as follows: the sintering is carried out for 8h under the heat preservation of 500 ℃ and then for 12h under the heat preservation of 850 ℃.
Example 5
A preparation method of a lithium nickel cobalt manganese oxide positive electrode material of a lithium ion battery comprises the following steps:
s1, weighing nickel sulfate, cobalt sulfate and manganese sulfate according to the molar ratio of 6:2:2, and dissolving in water to obtain a salt solution with the concentration of 2.5 mol/L;
s2, adding a template agent into the salt solution, and performing ultrasonic dispersion uniformly to obtain the salt solution containing the template agent, wherein the template agent is Co with the inner diameter of 100-300 nm, the wall thickness of 10-30 nm and the length-diameter ratio of 10-503O4/SnO2Nano hollow tube, the concentration of template agent is 0.9 mg/ml;
s3, adding the salt solution containing the template agent, an ammonia water solution with the concentration of 0.3mol/L and a sodium carbonate solution with the concentration of 2.5mol/L into a 20L stainless steel reaction kettle in a concurrent flow manner for stirring reaction, wherein the pH value of the reaction is 8.0, the stirring speed is 800rpm, the reaction temperature is 50 ℃, the liquid inlet speed is 18ml/min, the reaction time is 10h, and the modified Ni is obtained by aging, centrifuging, washing, and vacuum drying for 24h at 110 ℃ to obtain the modified Ni0.6Co0.2Mn0.2CO3Precursor, wherein the aging time is 24h, the centrifugal rotation speed is 4000rpm, and the centrifugal time is 4 min;
s4, modification of Ni0.85Co0.1Mn0.05Mixing the OH precursor with lithium hydroxide, ball-milling and sintering to obtain the lithium nickel cobalt manganese oxide positive electrode material of the lithium ion battery, wherein the modified Ni0.85Co0.1Mn0.05The ratio of the total mass of metal ions in the OH precursor to the mass of lithium in the lithium hydroxide is 1:1.09, and the sintering step is as follows: the sintering is carried out for 8h under the heat preservation of 500 ℃ and then for 12h under the heat preservation of 850 ℃.
Comparative example 1
A preparation method of a lithium nickel cobalt manganese oxide positive electrode material of a lithium ion battery comprises the following steps:
s1, weighing nickel sulfate, cobalt sulfate and manganese sulfate according to a molar ratio of 85:10:5, and dissolving in water to obtain a salt solution with a concentration of 2.0 mol/L;
s2, adding the salt solution, an ammonia water solution with the concentration of 0.5mol/L and a sodium hydroxide solution with the concentration of 4.0mol/L into a 20L stainless steel reaction kettle in a concurrent flow manner for stirring reaction, wherein the pH value of the reaction is 11.0, the stirring speed is 800rpm, the reaction temperature is 55 ℃, the liquid inlet speed is 15ml/min, the reaction time is 10h, and ageing, centrifuging, washing and drying are carried out to obtain Ni0.85Co0.1Mn0.05An OH precursor, wherein the aging time is 24h, the centrifugal rotation speed is 3500rpm, and the centrifugal time is 5 min;
s3, mixing the Ni0.85Co0.1Mn0.05Mixing the OH precursor with lithium hydroxide, ball-milling and sintering to obtain the lithium nickel cobalt manganese oxide positive electrode material of the lithium ion battery, wherein Ni is0.85Co0.1Mn0.05The ratio of the total amount of metal ions in the OH precursor to the amount of lithium in the lithium hydroxide is 1:1.03, and the sintering step is as follows: firstly, sintering at 600 ℃ for 8h, and then sintering at 780 ℃ for 12 h.
The positive electrode materials prepared in example 1 and comparative example 1 were assembled into a half cell for electrochemical performance testing, and detailed data are shown in table 1, and the rate curves (0.2C, 0.33C, 1C, 0.2C) and the 50-cycle-at-1C curves are shown in fig. 1.
TABLE 1 electrochemical Properties of cathode materials
As can be seen from table 1, the positive electrode material of the present invention can effectively improve the cycle stability of the battery.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (10)
1. A preparation method of a lithium nickel cobalt manganese oxide positive electrode material of a lithium ion battery is characterized by comprising the following steps:
s1, weighing nickel salt, cobalt salt and manganese salt according to the chemical formula of the nickel-cobalt-manganese precursor, and dissolving the nickel salt, the cobalt salt and the manganese salt in water to obtain a salt solution;
s2, adding a template agent into the salt solution, and uniformly dispersing to obtain a salt solution containing the template agent, wherein the template agent is Co3O4/SnO2A nano hollow tube;
s3, mixing the salt solution containing the template agent with an ammonia water solution and a precipitator solution, stirring for reaction, and aging, centrifuging, washing and drying to obtain a modified nickel-cobalt-manganese precursor;
and S4, mixing the modified nickel-cobalt-manganese precursor with a lithium source, ball-milling and sintering to obtain the lithium nickel-cobalt-manganese acid lithium positive electrode material of the lithium ion battery.
2. The method for preparing the lithium nickel cobalt manganese oxide positive electrode material of the lithium ion battery of claim 1, wherein the Co is added into the lithium nickel cobalt manganese oxide positive electrode material3O4/SnO2The inner diameter of the nano hollow tube is 100-300 nm, the wall thickness is 10-30 nm, and the length-diameter ratio is 10-50.
3. The method for preparing the lithium ion battery nickel cobalt manganese oxide positive electrode material according to claim 1 or 2, wherein the concentration of the template agent in the salt solution containing the template agent is 0.1-7.0 mg/mL.
4. The method for preparing the lithium nickel cobalt manganese oxide positive electrode material of the lithium ion battery according to any one of claims 1 to 3, wherein the concentration of the salt solution is 1.0 to 3.5mol/L, the nickel salt is nickel sulfate, the cobalt salt is cobalt sulfate, and the manganese salt is manganese sulfate; the concentration of the ammonia water solution is 0.1-1.5 mol/L; the concentration of the precipitant solution is 1.0-7.5 mol/L, wherein the precipitant is sodium carbonate, sodium hydroxide or a combination thereof.
5. The method for preparing the lithium nickel cobalt manganese oxide positive electrode material of the lithium ion battery according to any one of claims 1 to 4, wherein in the step S4, the reaction pH is 7.0 to 12.0, the stirring speed is 300 to 1500rpm, the reaction temperature is 50 to 60 ℃, and the reaction time is 8 to 12 hours; preferably, in the step S4, the salt solution containing the template, the ammonia solution, and the precipitant solution are added into the reaction kettle in parallel for reaction, and the liquid inlet rate is 10 to 25 ml/min.
6. The method for preparing the lithium nickel cobalt manganese oxide positive electrode material of the lithium ion battery according to any one of claims 1 to 5, wherein in the step S3, the aging time is 3 to 24 hours, the centrifugal rotation speed is 2000 to 6000rpm, and the centrifugal time is 3 to 15 min; in step S3, the sintering method specifically includes: sintering at 400-600 ℃ for 5-15 h, and sintering at 700-900 ℃ for 10-20 h.
7. The method for preparing the lithium nickel cobalt manganese oxide positive electrode material of the lithium ion battery according to any one of claims 1 to 6, wherein the nickel cobalt manganese precursor is NixCoyMn1-x-y(OH)2、NixCoyMn1-x-yCO3Or a combination thereof, wherein x is more than or equal to 0.6 and less than or equal to 1.0, and y is more than or equal to 0 and less than or equal to 0.4.
8. The method for preparing the lithium nickel cobalt manganese oxide cathode material of the lithium ion battery according to any one of claims 1 to 7, wherein the ratio of the total substance of the metal ions in the modified nickel cobalt manganese precursor to the substance of lithium in the lithium source is 1 (0.95-1.15).
9. The method for preparing the lithium ion battery nickel cobalt lithium manganate positive electrode material of any of claims 1-8, characterized in that the lithium source is Li2CO3LiOH or CH3One or more of COOLi.
10. A lithium ion battery nickel cobalt lithium manganate positive electrode material, characterized by being prepared by the preparation method of any one of claims 1-9.
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| US20100092866A1 (en) * | 2008-10-15 | 2010-04-15 | Korea Institute Of Science And Technology | Electrode for secondary battery, fabrication method thereof, and secondary battery comprising same |
| CN105514369A (en) * | 2015-12-07 | 2016-04-20 | 南京师范大学 | Hollow SnO2/Co3O4 hybrid nanotube as well as preparation method and application thereof |
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| US20100092866A1 (en) * | 2008-10-15 | 2010-04-15 | Korea Institute Of Science And Technology | Electrode for secondary battery, fabrication method thereof, and secondary battery comprising same |
| WO2010044557A2 (en) * | 2008-10-15 | 2010-04-22 | Korea Institute Of Science And Technology | Electrode for secondary battery, fabrication method thereof, and secondary battery comprising same |
| CN105514369A (en) * | 2015-12-07 | 2016-04-20 | 南京师范大学 | Hollow SnO2/Co3O4 hybrid nanotube as well as preparation method and application thereof |
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