CN105244192A - Magnesium cobaltite porous nanowire array/ nickel foam composite electrode material preparation method - Google Patents
Magnesium cobaltite porous nanowire array/ nickel foam composite electrode material preparation method Download PDFInfo
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- CN105244192A CN105244192A CN201510707198.1A CN201510707198A CN105244192A CN 105244192 A CN105244192 A CN 105244192A CN 201510707198 A CN201510707198 A CN 201510707198A CN 105244192 A CN105244192 A CN 105244192A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/13—Energy storage using capacitors
Abstract
The invention belongs to the field of inorganic nonmetallic material and especially relates to a magnesium cobaltite porous nanowire array/ nickel foam composite electrode material preparation method. The method is characterized by fully dissolving a soluble magnesium salt, a soluble cobalt salt, urea and ammonium fluoride in an alcohol/water mixed solution; and soaking cleaned and dried nickel foam into the mixed solution above, carrying out hydrothermal reaction, obtaining nickel foam having a nanowire array after cleaning and drying, and obtaining a magnesium cobaltite porous nanowire array/ nickel foam composite electrode material after drying, calcining and cooling. The method is simple and feasible, high in product purity and low in production cost; and the obtained product has a novel shape and firmly grows on the surface of the high-conductivity nickel foam. The diameter of the magnesium cobaltite nanowire is 20-50 nm, and the length and width thereof are around 3 mm; the uniformity and dispersibility of the product are good; the method can be directly applied to super capacitor electrode material; the production process is simple; and the method can be applied to practical large-scale production easily.
Description
Technical field
The invention belongs to the preparing technical field of Inorganic Non-metallic Materials, specifically relate to the preparation method of a kind of cobalt acid magnesium porous nano linear array/nickel foam combination electrode material.
Background technology
Along with the arrival of world energy sources crisis, the power supply unit (such as ultracapacitor, lithium ion battery etc.) of production and manufacturing property brilliance becomes more and more important.Transition metal oxide because of its various valence electron structure, abundant physics and chemistry character, and the focus becoming current research in the application in the fields such as photoelectricity, catalysis, magnetic and ultracapacitor.The quality of electrode material for super capacitor is the key factor affecting its power-performance.Metal oxide is also the more potential electrode material for super capacitor of a class.
People have done more research to metal oxide as electrode material for super capacitor, also have made great progress.Current research mainly concentrates on simple transiton metal binary oxides, and ternary transition metal oxide comprises two kinds of different metal ions usually, receives increasing concern owing to all having potential application in various energy resources association area.And the cobalt-based metal oxide of ternary spinel structure outstanding person wherein especially.Except containing except oxygen element, cobalt element in the cobalt-based metal oxide of ternary spinel structure, also containing another metallic element.As cobalt acid zinc, cobalt acid magnesium, cobalt acid nickel, cobalt acid copper, cobalt acid magnesium etc.Wherein very potential as electrode material for super capacitor of cobalt acid magnesium, the ratio capacitance value of its theory is 3122F/g, and the value of report only has 320F/g at present, to also have very large room for promotion (see KrishnanSG, ReddyMV, HarilalM, etal.CharacterizationofMgCo
2o
4asanelectrodeforhighperformancesupercapacitors [J] .ElectrochimicaActa, 2015,161:312-321).
Summary of the invention
The present invention is intended to overcome the deficiencies in the prior art part and provides a kind of technique simple, and preparation cost is low, and object product yield is high, and product purity is high, has the preparation method of the cobalt acid magnesium porous nano linear array/nickel foam combination electrode material of better chemical property.
For achieving the above object, the present invention realizes like this.
A preparation method for cobalt acid magnesium porous nano linear array/nickel foam combination electrode material, is characterized in that: solubility magnesium salts, soluble cobalt, urea and ammonium fluoride are fully dissolved in alcohol/water mixed solution.To clean and dried nickel foam is immersed in above-mentioned mixed solution, carry out hydro-thermal reaction, after washing drying, obtain the long nickel foam having Nanowire arrays, more namely obtain object product after super-dry, calcining cooling.
As a kind of preferred version, solubility magnesium salts of the present invention is one or both mixture of magnesium nitrate or magnesium chloride; Described soluble cobalt is one or both mixture of cobalt nitrate or cobalt chloride.
As another kind of preferred version, the mol ratio of solubility magnesium salts of the present invention, soluble cobalt, urea and ammonium fluoride is followed successively by 1:2:12:4 ~ 40.
Further, the alcohol in alcohol/water mixed solution of the present invention is one or more the mixture in methyl alcohol, ethanol, ethylene glycol, normal propyl alcohol or isopropyl alcohol, and the volume ratio of alcohol and water is 1: 0.1 ~ 100.
Further, the molar concentration of solubility magnesium salts of the present invention is 0.01 ~ 2.0mol/L.
Further, hydrothermal temperature of the present invention is at 110 ~ 160 ° of C, and the reaction time is 6 ~ 12 hours.
Further, drying time of the present invention is 1 ~ 3 hour, and baking temperature is 60 ~ 120 ° of C, and heating rate is 2 ~ 10 ° of C/ minute.
Further, calcination time of the present invention is 2 ~ 5 hours, and calcining heat is 300 ~ 450 ° of C, and heating rate is 2 ~ 20 ° of C/ minute.
The present invention adopts at conductive substrates surface in situ growing metal oxide electrode material, effectively can improve the diffusion mass transfer performance that active material utilization is high, increase active surface, improve material.Utilize hydro-thermal-calcining two-step method, successfully prepare cobalt acid magnesium porous nano linear array/nickel foam combination electrode material.Due to the existence of porous nano linear array structure, make material have larger specific area and abundant space, these structures are conducive to the transmission of electrolytical infiltration and electronics.This cobalt acid magnesium porous nano linear array/nickel foam combination electrode shows excellent electrochemical properties, is the very potential super capacitance electrode material of one.The structure of the character of this excellence and cobalt acid magnesium porous nano linear array/this novelty of nickel foam has close relationship.
Compared with prior art, the present invention has following features.
(1) present invention process route is simple, preparation cost is low, easy to control, there is higher production efficiency, by the effective control to synthesis condition, the cobalt acid magnesium of synthesis has the nanowire array structure of porous, and firmly grows at the nickel foam metal surface of high conductivity formation composite material.
(2) the present invention prepares object product cobalt acid magnesium porous nano linear array/nickel foam combination electrode material, and its purity high (99.90% ~ 99.98%), impurity content is low, good dispersion (can be found out by SEM figure).The diameter of cobalt acid magnesium nano wire is between 20 ~ 50nm.Length and width are at about 3mm.
(3) cobalt acid magnesium porous nano linear array/nickel foam combination electrode material, can directly as electrode of super capacitor, and its ratio capacitance is high, good cycle, and the performance of this excellence and cobalt acid magnesium porous nano linear array structure have close relationship.The requirement of industrial application to cobalt acid magnesium loose structure electrode material product can be met.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the invention will be further described.Protection scope of the present invention is not only confined to the statement of following content.
The EDX spectrogram of the cobalt acid magnesium porous nano linear array/nickel foam combination electrode material of Fig. 1 prepared by the present invention.
The X-ray diffraction pattern figure of the cobalt acid magnesium porous nano linear array/nickel foam combination electrode material of Fig. 2 prepared by the present invention.
The SEM shape appearance figure of the cobalt acid magnesium porous nano linear array/nickel foam combination electrode material of Fig. 3 prepared by the present invention.
The SEM shape appearance figure of the cobalt acid magnesium porous nano linear array/nickel foam combination electrode material of Fig. 4 prepared by the present invention.
The SEM shape appearance figure of the cobalt acid magnesium porous nano linear array/nickel foam combination electrode material of Fig. 5 prepared by the present invention.
The SEM shape appearance figure of the cobalt acid magnesium porous nano linear array/nickel foam combination electrode material of Fig. 6 prepared by the present invention.
The SEM shape appearance figure of the cobalt acid magnesium porous nano linear array/nickel foam combination electrode material of Fig. 7 prepared by the present invention.
The SEM shape appearance figure of the cobalt acid magnesium porous nano linear array/nickel foam combination electrode material of Fig. 8 prepared by the present invention.
The SEM shape appearance figure of the cobalt acid magnesium porous nano linear array/nickel foam combination electrode material of Fig. 9 prepared by the present invention.
The SEM shape appearance figure of the cobalt acid magnesium porous nano linear array/nickel foam combination electrode material of Figure 10 prepared by the present invention.
The SEM shape appearance figure of the cobalt acid magnesium porous nano linear array/nickel foam combination electrode material of Figure 11 prepared by the present invention.
The SEM shape appearance figure of the cobalt acid magnesium porous nano linear array/nickel foam combination electrode material of Figure 12 prepared by the present invention.
The SEM shape appearance figure of the cobalt acid magnesium porous nano linear array/nickel foam combination electrode material of Figure 13 prepared by the present invention.
The SEM shape appearance figure of the cobalt acid magnesium porous nano linear array/nickel foam combination electrode material of Figure 14 prepared by the present invention.
Embodiment
Solubility magnesium salts, soluble cobalt, urea and ammonium fluoride fully dissolve by the present invention in alcohol/water mixed solution.Will clean and dried nickel foam is immersed in above-mentioned mixed solution, (temperature is at 110 ~ 160 ° of C to carry out hydro-thermal reaction, time is 6 ~ 12 hours), obtain after washing drying long have the nickel foam of Nanowire arrays (drying time is 1 ~ 3 hour, temperature is 60 ~ 120 ° of C, and heating rate is 2 ~ 10 ° of C/ minute).Namely object product (calcination time is 2 ~ 5 hours, and temperature is 300 ~ 450 ° of C, and heating rate is 2 ~ 20 ° of C/ minute) is obtained after calcining cooling.
Its preparation process is.
(1) by solubility magnesium salts, soluble cobalt, urea and ammonium fluoride according to after certain molar ratio weighing, be placed in alcohol water mixed solution and fully dissolve.
(2) will clean and dried nickel foam is immersed in above-mentioned mixed solution, carry out hydro-thermal reaction, hydrothermal temperature is at 110 ~ 160 ° of C, and the hydro-thermal reaction time is 6 ~ 12 hours.
(3) hydro-thermal reaction terminates, and after naturally cooling to room temperature, obtain the long nickel foam having Nanowire arrays, put into baking oven after washing, programmed rate is 2 ~ 10 ° of C/ minute, under 60 ~ 120 ° of C conditions, and dry 1 ~ 3 hour.
(4) above-mentioned dried after, obtained product is directly calcined in Muffle furnace, Muffle furnace Program heat up heating rate scope at 2 ~ 20 ° of C/min.Calcination time is 2 ~ 5 hours, and calcining heat is 300 ~ 450 ° of C.Naturally cobalt acid magnesium porous nano linear array/nickel foam combination electrode material is namely obtained after cooling.
The EDX spectrogram of the cobalt acid magnesium porous nano linear array/nickel foam combination electrode material of Fig. 1 prepared by the present invention.Consequently, products obtained therefrom cobalt acid magnesium loose structure electrode material is made up of magnesium, cobalt and oxygen three kinds of elements.
The X-ray diffraction pattern figure (sample scrapes off measurement from nickel foam surface) of the cobalt acid magnesium porous nano line of Fig. 2 prepared by the present invention.
Shown in Fig. 3 ~ 14, ESEM (SEM) figure of the cobalt acid magnesium porous nano linear array/nickel foam combination electrode material prepared by the present invention, consequently, products obtained therefrom cobalt acid magnesium loose structure electrode material is nano wire pattern, and uniform growth is surperficial in the nickel foam that conductivity is high.The diameter of cobalt acid magnesium nano wire is between 20 ~ 50nm.Length and width are at about 3mm.The dispersiveness of product and homogeneity are all fine.
embodiment 1.
Be 1:2:12:20 by magnesium nitrate, cobalt nitrate, urea and ammonium fluoride according to mol ratio, after precise, put into ethanol water (volume ratio of alcohol to water 1:2) stirring and dissolving.Will clean and dried nickel foam is immersed in above-mentioned mixed solution, carry out hydro-thermal reaction, hydrothermal temperature is at 150 ° of C, and the hydro-thermal reaction time is 6 hours.After hydro-thermal reaction terminates, naturally cool to room temperature, put into baking oven by after the product filtration washing be obtained by reacting, programmed rate 5 ° of C/ minute, drying 2 hours under 100 ° of C conditions.Then be placed in Muffle furnace and calcine, calcination time is 2.5 hours, and calcining heat is 350 ° of C, and heating rate is 10 ° of C/ minute.Naturally cobalt acid magnesium porous nano linear array/nickel foam combination electrode material is namely obtained after cooling.(see accompanying drawing 1-14).
Product purity is not less than 99.97%, impurity content: carbon is less than 0.02%; Nitrogen is less than 0.01%.Using prepared cobalt acid magnesium porous nano linear array/nickel foam combination electrode material directly as work electrode.Under three-electrode system, measure its capacitive property, be platinum electrode to electrode, and reference electrode is saturated calomel electrode, and test constant current charge-discharge, when current density is 5A/g, its ratio capacitance value is up to 727F/g.The ratio capacitance value after 5000 times that circulates only has decayed 3.2%.
embodiment 2.
Be 1:2:12:30 by magnesium nitrate, cobalt nitrate, urea and ammonium fluoride according to mol ratio, after precise, put into isopropanol water solution (volume ratio of alcohol to water 1:3) stirring and dissolving.Will clean and dried nickel foam is immersed in above-mentioned mixed solution, carry out hydro-thermal reaction, hydrothermal temperature is at 150 ° of C, and the hydro-thermal reaction time is 8 hours.After hydro-thermal reaction terminates, naturally cool to room temperature, put into baking oven by after the product filtration washing be obtained by reacting, programmed rate 5 ° of C/ minute, drying 2 hours under 100 ° of C conditions.Then be placed in Muffle furnace and calcine, calcination time is 3 hours, and calcining heat is 350 ° of C, and heating rate is 10 ° of C/ minute.Naturally cobalt acid magnesium porous nano linear array/nickel foam combination electrode material is namely obtained after cooling.
Product purity is not less than 99.97%, impurity content: carbon is less than 0.02%; Nitrogen is less than 0.01%.Using prepared cobalt acid magnesium porous nano linear array/nickel foam combination electrode material directly as work electrode.Under three-electrode system, measure its capacitive property, be platinum electrode to electrode, and reference electrode is saturated calomel electrode, and test constant current charge-discharge, when current density is 5A/g, its ratio capacitance value is up to 775F/g.The ratio capacitance value after 5000 times that circulates only has decayed 3.4%.
embodiment 3.
Be 1:2:12:10 by magnesium nitrate, cobalt nitrate, urea and ammonium fluoride according to mol ratio, after precise, put into methanol aqueous solution (volume ratio of alcohol to water 1:1) stirring and dissolving.Will clean and dried nickel foam is immersed in above-mentioned mixed solution, carry out hydro-thermal reaction, hydrothermal temperature is at 150 ° of C, and the hydro-thermal reaction time is 8 hours.After hydro-thermal reaction terminates, naturally cool to room temperature, put into baking oven by after the product filtration washing be obtained by reacting, programmed rate 5 ° of C/ minute, drying 2 hours under 100 ° of C conditions.Then be placed in Muffle furnace and calcine, calcination time is 3 hours, and calcining heat is 350 ° of C, and heating rate is 10 ° of C/ minute.Naturally cobalt acid magnesium porous nano linear array/nickel foam combination electrode material is namely obtained after cooling.
Product purity is not less than 99.96%, impurity content: carbon is less than 0.02%; Nitrogen is less than 0.02%.Using prepared cobalt acid magnesium porous nano linear array/nickel foam combination electrode material directly as work electrode.Under three-electrode system, measure its capacitive property, be platinum electrode to electrode, and reference electrode is saturated calomel electrode, and test constant current charge-discharge, when current density is 5A/g, its ratio capacitance value is up to 697F/g.The ratio capacitance value after 5000 times that circulates only has decayed 3.5%.
embodiment 4.
Be 1:2:12:10 by magnesium chloride, cobalt chloride, urea and ammonium fluoride according to mol ratio, after precise, put into glycol water (volume ratio of alcohol to water 1:3) stirring and dissolving.Will clean and dried nickel foam is immersed in above-mentioned mixed solution, carry out hydro-thermal reaction, hydrothermal temperature is at 160 ° of C, and the hydro-thermal reaction time is 8 hours.After hydro-thermal reaction terminates, naturally cool to room temperature, put into baking oven by after the product filtration washing be obtained by reacting, programmed rate 5 ° of C/ minute, drying 2 hours under 110 ° of C conditions.Then be placed in Muffle furnace and calcine, calcination time is 3 hours, and calcining heat is 400 ° of C, and heating rate is 10 ° of C/ minute.Naturally cobalt acid magnesium porous nano linear array/nickel foam combination electrode material is namely obtained after cooling.
Product purity is not less than 99.95%, impurity content: carbon is less than 0.02%; Chlorine is less than 0.03%.Using prepared cobalt acid magnesium porous nano linear array/nickel foam combination electrode material directly as work electrode.Under three-electrode system, measure its capacitive property, be platinum electrode to electrode, and reference electrode is saturated calomel electrode, and test constant current charge-discharge, when current density is 5A/g, its ratio capacitance value is up to 601F/g.The ratio capacitance value after 5000 times that circulates only has decayed 3.4%.
embodiment 5.
Be 1:2:12:20 by magnesium chloride, cobalt chloride, urea and ammonium fluoride according to mol ratio, after precise, put into the normal propyl alcohol aqueous solution (volume ratio of alcohol to water 1:5) stirring and dissolving.Will clean and dried nickel foam is immersed in above-mentioned mixed solution, carry out hydro-thermal reaction, hydrothermal temperature is at 160 ° of C, and the hydro-thermal reaction time is 8 hours.After hydro-thermal reaction terminates, naturally cool to room temperature, put into baking oven by after the product filtration washing be obtained by reacting, programmed rate 5 ° of C/ minute, drying 2 hours under 110 ° of C conditions.Then be placed in Muffle furnace and calcine, calcination time is 3 hours, and calcining heat is 450 ° of C, and heating rate is 10 ° of C/ minute.Naturally cobalt acid magnesium porous nano linear array/nickel foam combination electrode material is namely obtained after cooling.
Product purity is not less than 99.94%, impurity content: carbon is less than 0.03%; Chlorine is less than 0.03%.Using prepared cobalt acid magnesium porous nano linear array/nickel foam combination electrode material directly as work electrode.Under three-electrode system, measure its capacitive property, be platinum electrode to electrode, and reference electrode is saturated calomel electrode, and test constant current charge-discharge, when current density is 5A/g, its ratio capacitance value is up to 598F/g.The ratio capacitance value after 5000 times that circulates only has decayed 3.3%.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. a preparation method for cobalt acid magnesium porous nano linear array/nickel foam combination electrode material, is characterized in that: solubility magnesium salts, soluble cobalt, urea and ammonium fluoride are fully dissolved in alcohol/water mixed solution; To clean and dried nickel foam is immersed in above-mentioned mixed solution, and to carry out hydro-thermal reaction, after washing drying, obtain the long nickel foam having Nanowire arrays, more namely obtain object product after super-dry, calcining cooling.
2. the preparation method of a kind of cobalt acid magnesium porous nano linear array/nickel foam combination electrode material according to claim 1, is characterized in that: described solubility magnesium salts is one or both mixture of magnesium nitrate or magnesium chloride; Described soluble cobalt is one or both mixture of cobalt nitrate or cobalt chloride.
3. the preparation method of a kind of cobalt acid magnesium porous nano linear array/nickel foam combination electrode material according to claim 2, is characterized in that: the mol ratio of described solubility magnesium salts, soluble cobalt, urea and ammonium fluoride is followed successively by 1:2:12:4 ~ 40.
4. the preparation method of a kind of cobalt acid magnesium porous nano linear array/nickel foam combination electrode material according to claim 3, it is characterized in that: the alcohol in described alcohol/water mixed solution is one or more the mixture in methyl alcohol, ethanol, ethylene glycol, normal propyl alcohol or isopropyl alcohol, and the volume ratio of alcohol and water is followed successively by 1:0.1 ~ 100.
5. the preparation method of a kind of cobalt acid magnesium porous nano linear array/nickel foam combination electrode material according to claim 4, is characterized in that: the molar concentration of described solubility magnesium salts is 0.01 ~ 2.0mol/L.
6., according to the preparation method of arbitrary described a kind of cobalt acid magnesium porous nano linear array/nickel foam combination electrode material of Claims 1 to 5, it is characterized in that: described hydrothermal temperature is at 110 ~ 160 ° of C, and the reaction time is 6 ~ 12 hours.
7. the preparation method of a kind of cobalt acid magnesium porous nano linear array/nickel foam combination electrode material according to claim 6, it is characterized in that: described drying time is 1 ~ 3 hour, baking temperature is 60 ~ 120 ° of C, and heating rate is 2 ~ 10 ° of C/ minute.
8. the preparation method of a kind of cobalt acid magnesium porous nano linear array/nickel foam combination electrode material according to claim 7, it is characterized in that: described calcination time is 2 ~ 5 hours, calcining heat is 300 ~ 450 ° of C, and heating rate is 2 ~ 20 ° of C/ minute.
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| CN105951123A (en) * | 2016-05-06 | 2016-09-21 | 湖北大学 | Preparation method for NiCoP nanowire electro-catalytic electrode |
| CN106158420A (en) * | 2016-08-11 | 2016-11-23 | 浙江大学 | A kind of NiSe Ni for ultracapacitor3se2porous nano ball material and preparation method thereof |
| CN108538631A (en) * | 2018-04-12 | 2018-09-14 | 江苏大学 | Solvent heat-in-situ oxidizing-polymerizing method prepares method and the application of Ni-based cobalt acid magnesium combination electrode material |
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| CN109273289A (en) * | 2018-08-01 | 2019-01-25 | 江苏大学 | Solvent method prepares Ni-based cobalt acid magnesium base composite material and its application |
| CN109599564A (en) * | 2018-11-27 | 2019-04-09 | 东华大学 | Cobalt acid nickel array self-supporting large area air electrode and its preparation and application |
| CN110233268A (en) * | 2019-05-29 | 2019-09-13 | 中国石油大学(北京) | A kind of cobalt acid magnesium nano wire of high exposed crystal face and its preparation method and application |
| CN113201751A (en) * | 2021-03-26 | 2021-08-03 | 广州费舍尔人工智能技术有限公司 | Magnesium-cobalt-copper oxide modified nitrogen-doped carbon sphere electrode catalyst |
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| CN113845149A (en) * | 2021-07-26 | 2021-12-28 | 江汉大学 | Nano magnesium cobaltate and preparation method and application thereof |
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| CN105951123A (en) * | 2016-05-06 | 2016-09-21 | 湖北大学 | Preparation method for NiCoP nanowire electro-catalytic electrode |
| CN106158420A (en) * | 2016-08-11 | 2016-11-23 | 浙江大学 | A kind of NiSe Ni for ultracapacitor3se2porous nano ball material and preparation method thereof |
| CN108538631A (en) * | 2018-04-12 | 2018-09-14 | 江苏大学 | Solvent heat-in-situ oxidizing-polymerizing method prepares method and the application of Ni-based cobalt acid magnesium combination electrode material |
| CN108872216A (en) * | 2018-05-24 | 2018-11-23 | 首都师范大学 | A kind of cobalt nickel nano-wire array and the preparation method and application thereof |
| CN109273289A (en) * | 2018-08-01 | 2019-01-25 | 江苏大学 | Solvent method prepares Ni-based cobalt acid magnesium base composite material and its application |
| CN109599564A (en) * | 2018-11-27 | 2019-04-09 | 东华大学 | Cobalt acid nickel array self-supporting large area air electrode and its preparation and application |
| CN109599564B (en) * | 2018-11-27 | 2022-09-06 | 东华大学 | Nickel cobaltate array self-supporting large-area air electrode and preparation and application thereof |
| CN110233268A (en) * | 2019-05-29 | 2019-09-13 | 中国石油大学(北京) | A kind of cobalt acid magnesium nano wire of high exposed crystal face and its preparation method and application |
| CN113201751A (en) * | 2021-03-26 | 2021-08-03 | 广州费舍尔人工智能技术有限公司 | Magnesium-cobalt-copper oxide modified nitrogen-doped carbon sphere electrode catalyst |
| CN113830838A (en) * | 2021-07-26 | 2021-12-24 | 江汉大学 | Preparation method and application of magnesium cobaltate |
| CN113845149A (en) * | 2021-07-26 | 2021-12-28 | 江汉大学 | Nano magnesium cobaltate and preparation method and application thereof |
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