CN108520827A - Carbon fiber/NiCo2O4The preparation method of/graphene composite material - Google Patents

Carbon fiber/NiCo2O4The preparation method of/graphene composite material Download PDF

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CN108520827A
CN108520827A CN201810081472.2A CN201810081472A CN108520827A CN 108520827 A CN108520827 A CN 108520827A CN 201810081472 A CN201810081472 A CN 201810081472A CN 108520827 A CN108520827 A CN 108520827A
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carbon fiber
nico
composite material
graphene
preparation
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李素敏
江徽
杨康
罗南辉
李松军
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Jiangsu University
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01GCAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/22Electrodes
    • H01G11/24Electrodes characterised by structural features of the materials making up or comprised in the electrodes, e.g. form, surface area or porosity; characterised by the structural features of powders or particles used therefor
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01GCAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/22Electrodes
    • H01G11/30Electrodes characterised by their material
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01GCAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/22Electrodes
    • H01G11/30Electrodes characterised by their material
    • H01G11/32Carbon-based
    • H01G11/36Nanostructures, e.g. nanofibres, nanotubes or fullerenes
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01GCAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/22Electrodes
    • H01G11/30Electrodes characterised by their material
    • H01G11/32Carbon-based
    • H01G11/40Fibres
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01GCAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/84Processes for the manufacture of hybrid or EDL capacitors, or components thereof
    • H01G11/86Processes for the manufacture of hybrid or EDL capacitors, or components thereof specially adapted for 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
    • Y02E60/13Energy storage using capacitors

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  • Chemical & Material Sciences (AREA)
  • Microelectronics & Electronic Packaging (AREA)
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  • Electric Double-Layer Capacitors Or The Like (AREA)
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Abstract

The invention discloses a kind of carbon fiber/NiCo2O4The preparation method of/graphene composite material, belongs to technical field of nano material.The present invention uses structural carbon fiber for substrate, by hydro-thermal method in carbon fiber surface fabricated in situ NiCo2O4The nano wire multi-stage micro-nano structure interlaced, mutually interspersed with porous graphene.The advantage of the invention is that conductive carbon fibre, NiCo can not only be given full play to2O4The respective energy storage characteristic of nano wire and porous graphene, and multi-stage micro-nano structure can give full play to the synergistic effect between three, carbon fiber/NiCo prepared by the present invention2O4/ graphene composite material is used for electrode material for super capacitor, and when current density is 1A/g, specific capacity is up to 1120.74, the great application potential in terms of flexible energy storage electrode material.

Description

Carbon fiber/NiCo2O4The preparation method of/graphene composite material
Technical field
The invention belongs to technical field of nano material, and in particular to a kind of carbon fiber/NiCo2O4/ graphene composite material Preparation method.
Background technology
Flexible super capacitor is keeping conventional Super capacitor high power close as a kind of important flexible energy storage device Under the premise of the features such as degree, fast charging and discharging, overlength cycle life, but be endowed it is stretchable, bent, the machinery such as can wind and belong to Property, great development potentiality, and it is to obtain high-performance flexible ultracapacitor to prepare the flexible electrode with excellent electrochemical performance Key;Carbon fiber not only has the excellent properties such as high intensity, high-modulus, low-density, also has excellent electric conductivity, flexible Property, chemical stability and carbon material inherent characteristic, become the research hotspot of flexible electrode material.
However, due to carbon fiber structural densification, relatively low (the < 30m of specific surface area2/ g), directly as flexible electrode material Expect that chemical property is poor.It is to improve having for its chemical property to introduce transition metal oxide nano structure in carbon fiber surface Effect approach, especially transiton metal binary oxides NiCo2O4, because of its theoretical specific capacity height, stable structure and good cycle etc. Advantage and be concerned.Chinese patent CN 104773762 A propositions prepare NiCo on carbon cloth2O4Meso-porous nano tube material To obtain high-performance super capacitor electrode material.Shen etc., which is reported on carbon cloth, prepares mesoporous NiCo2O4Nano wire obtains Height ratio capacity and the excellent ultracapacitor flexible electrode material of multiplying power property [Adv.Funct.Mater., 2014, (24): 2630-2637].Gao etc. is by NiCo2O4Be designed to multilevel hierarchy obtain height ratio capacity electrode material [Nano Energy, 2015,(13):306-317].NiCo is synthesized in carbon fiber surface2O4Nanostructure, such as NiCo2O4Nanosphere, nanometer rods, nanometer Line, nanometer sheet and mixing nanostructure have been reported that in recent years, and carbon fiber is improved using nano material large specific surface area The chemical property of electrode is extremely effective.However, due to NiCo2O4Poorly conductive makes its chemical property be restricted, with reason Still there is larger gap by capacity, how to be effectively improved carbon fiber/NiCo2O4The electric conductivity of flexible electrode material becomes urgently to be resolved hurrily The problem of.
Invention content
The purpose of the present invention is to provide a kind of carbon fiber/NiCo2O4The preparation method of/graphene composite material, by NiCo2O4Porous graphene is introduced between nano wire, improves carbon fiber/NiCo2O4The electric conductivity of flexible electrode material is carbon fiber The application for tieing up flexible electrode provides technical support.
In order to solve the above technical problems, the specific technical solution that the present invention uses is as follows:
Carbon fiber/NiCo2O4The preparation method of/graphene composite material, it is characterised in that:By two step hydro-thermal reactions, Carbon fiber surface fabricated in situ NiCo2O4Nano wire, in NiCo2O4Intert porous graphene piece on nano wire, is formed and mutually handed over Wrong, mutually interspersed multi-stage micro-nano structure, specifically comprises the following steps:
Step 1, by cobalt salt, nickel salt and urea are dissolved in the mixed solution of water and ethyl alcohol, and ultrasonic disperse is uniform, will be mixed Object is transferred to reaction kettle, and the carbon fiber of activation process is added, and 8~10h is reacted at 100~130 DEG C, by products therefrom distilled water It cleans up, obtains the carbon fiber of area load nickel cobalt presoma;
Urea is added in porous oxidation graphene aqueous solution by step 2, and mixture is transferred to reaction after supersound process The carbon fiber of area load nickel cobalt presoma is added in kettle, heats 6~10h under the conditions of 120 DEG C~180 DEG C, dry;
Sample after drying is put into tube furnace by step 3, and 1~3h is heat-treated under the conditions of 300~400 DEG C, is obtained Carbon fiber/NiCo2O4/ graphene composite material.
A kind of carbon fiber/NiCo2O4The preparation method of/graphene composite material, it is characterised in that the carbon fiber Dimension is carbon fiber wire or carbon fiber preform.
A kind of carbon fiber/NiCo2O4The preparation method of/graphene composite material, it is characterised in that:The work The carbon fiber for changing processing is prepared by the following method to obtain:Acetone is used to carbon fiber handle except slurry first;Later to carbon Fiber carries out liquid phase chemical oxidation processes, is washed with deionized water to neutrality, dry, obtains the carbon fiber of activation process.
A kind of carbon fiber/NiCo2O4The preparation method of/graphene composite material, it is characterised in that:The step (1) in, the cobalt salt is Co (NO3)2·6H2O or CoCl2·6H2O, the nickel salt are Ni (NO3)2·6H2O or NiCl2·6H2O, wherein cobalt salt:Nickel salt molar ratio is 2:1;The ratio of the mixed solution of cobalt salt, nickel salt, urea and water and ethyl alcohol Control exists:0.001~0.005mol:0.0005~0.0025mol:0.01~0.03mol:The mixing of 50ml, water and ethyl alcohol is molten The volume ratio of water and ethyl alcohol is 1 in liquid:1.
In step (2), the ratio of urea and porous oxidation graphene aqueous solution is 0.002~0.02mol:50ml, it is porous A concentration of 0.2~1mg/ml of graphene oxide water solution;Sonication treatment time is 6h;Drying condition is dry under the conditions of being 60 DEG C 12h。
A kind of carbon fiber/NiCo2O4The preparation method of/graphene composite material, it is characterised in that:Described is more Hole graphene oxide is prepared by the following method to obtain:It is 1 by volume ratio:The H of 10 0.3wt%2O2Aqueous solution and 2mg/ml oxygen Graphite aqueous solution is uniformly mixed, and under stirring condition, is heated to 100 DEG C, is handled 4~6h, is centrifuged simultaneously cleaning sample, is obtained more Hole graphene oxide.
Compared with prior art, the present invention has the following advantages and beneficial effect:
The present invention uses structural carbon fiber for substrate, by hydro-thermal method in carbon fiber surface fabricated in situ NiCo2O4Nanometer Line, porous graphene are interspersed in NiCo2O4Between nano wire, interlaced three-dimensional conductive network structure is formed, it can not only be abundant Play conductive carbon fibre, NiCo2O4The respective energy storage characteristic of nano wire and porous graphene, and 3-dimensional multi-layered secondary structure can be abundant The synergistic effect between three is played, the chemical property of electrode material is greatly improved.
Test carbon fiber/NiCo2O4Chemical property under nanowire composite difference current density, is specifically shown in
Embodiment 1-5.
Description of the drawings
Fig. 1 is the carbon fiber loaded NiCo of the present invention2O4The XRD diagram of/graphene composite material;
Fig. 2 is carbon fiber/NiCo of the present invention2O4The SEM of/graphene composite material schemes;
Fig. 3 is NiCo of the present invention2O4The TEM of nano wire schemes;
Fig. 4 is carbon fiber/NiCo prepared by the embodiment of the present invention 32O4The constant current charge-discharge curve of/graphene composite material.
Specific implementation mode
Below in conjunction with the specific embodiment content that the present invention is furture elucidated, but these embodiments are not intended to limit the present invention Protection domain.
Embodiment 1
By 0.001mol Co (NO3)2·6H2O、0.0005mol Ni(NO3)2·6H2O and 0.01mol urea is dissolved in For 25ml distilled water with the mixed solution of 25ml ethyl alcohol, ultrasonic disperse is uniform, and mixture is transferred to reaction kettle, carbon fiber is added, 8h is reacted in 130 DEG C, products therefrom is clean wash with distilled water, dry, obtains the carbon fiber of area load nickel cobalt presoma;It will 0.002mol urea is added in the porous oxidation graphene aqueous solution of the 0.2mg/ml of 50ml, 6h is ultrasonically treated, by mixture It is transferred to reaction kettle, the carbon fiber of nickel-loaded cobalt precursor is added, 6h is reacted at 180 DEG C, it is dry under the conditions of 60 DEG C later 12h;Finally, products therefrom is heat-treated 3h at 300 DEG C in tube furnace, obtains carbon fiber/NiCo2O4/ graphene composite wood Material.By carbon fiber/NiCo manufactured in the present embodiment2O4/ graphene composite material is used for electrode of super capacitor, tests its difference Chemical property under current density, when current density is 1A/g, specific capacity is up to 836.67F/g, current density 10A/g When, specific capacity 639.05A/g.
Embodiment 2
By 0.003mol CoCl2·6H2O、0.0015mol NiCl2·6H2O and 0.02mol urea is dissolved in 25ml steamings For distilled water with the mixed solution of 25ml ethyl alcohol, ultrasonic disperse is uniform, and mixture is transferred to reaction kettle, carbon fiber is added, in 120 DEG C 9h is reacted, products therefrom is clean wash with distilled water, dry, obtains the carbon fiber of area load nickel cobalt presoma;It will 0.006mol urea is added in the porous oxidation graphene aqueous solution of the 0.5mg/ml of 50ml, 6h is ultrasonically treated, by mixture It is transferred to reaction kettle, the carbon fiber of nickel-loaded cobalt precursor is added, 10h is reacted at 120 DEG C, it is dry under the conditions of 60 DEG C later 12h;Finally, products therefrom is heat-treated 1h at 400 DEG C in tube furnace, obtains carbon fiber/NiCo2O4/ graphene composite wood Material.By carbon fiber/NiCo manufactured in the present embodiment2O4/ graphene composite material is used for electrode of super capacitor, tests its difference Chemical property under current density, when current density is 1A/g, specific capacity is up to 945.9F/g, when current density is 10A/g, Specific capacity is 817.14A/g.
Embodiment 3
By 0.004mol Co (NO3)2·6H2O、0.002mol Ni(NO3)2·6H2O and 0.024mol urea, is dissolved in For 25ml distilled water with the mixed solution of 25ml ethyl alcohol, ultrasonic disperse is uniform, and mixture is transferred to reaction kettle, carbon fiber is added, 10h is reacted in 100 DEG C, products therefrom is clean wash with distilled water, dry, obtains the carbon fiber of area load nickel cobalt presoma; 0.003mol urea is added in the porous oxidation graphene aqueous solution of the 0.4mg/ml of 50ml, is ultrasonically treated 6h, will mix Object is transferred to reaction kettle, and the carbon fiber of nickel-loaded cobalt precursor is added, 8h is reacted at 150 DEG C, dry under the conditions of 60 DEG C later 12h;Finally, products therefrom is heat-treated 2h at 300 DEG C in tube furnace, obtains carbon fiber/NiCo2O4/ graphene composite wood Material.By carbon fiber/NiCo manufactured in the present embodiment2O4/ graphene composite material is used for electrode of super capacitor, tests its difference Chemical property under current density, when current density is 1A/g, specific capacity is up to 1120.74F/g, current density 10A/g When, specific capacity 860.71A/g.
Embodiment 4
By 0.005mol CoCl2·6H2O、0.0025mol NiCl2·6H2O and 0.03mol urea is dissolved in 25ml steamings For distilled water with the mixed solution of 25ml ethyl alcohol, ultrasonic disperse is uniform, and mixture is transferred to reaction kettle, carbon fiber is added, in 110 DEG C 10h is reacted, products therefrom is clean wash with distilled water, dry, obtains the carbon fiber of area load nickel cobalt presoma;It will 0.02mol urea is added in the porous oxidation graphene aqueous solution of 1mg/ml, is ultrasonically treated 6h, mixture is transferred to reaction Kettle is added the carbon fiber of nickel-loaded cobalt precursor, 8h is reacted at 140 DEG C, later the dry 12h under the conditions of 60 DEG C;Finally, will Products therefrom is heat-treated 2h in tube furnace at 350 DEG C, obtains carbon fiber/NiCo2O4/ graphene composite material.This is implemented Carbon fiber/NiCo prepared by example2O4/ graphene composite material is used for electrode of super capacitor, tests under its different current density Chemical property, when current density is 1A/g, specific capacity is up to 886.97F/g, and when current density is 10A/g, specific capacity is 733.32A/g。
Embodiment 5
By 0.004mol Co (NO3)2·6H2O、0.002mol Ni(NO3)2·6H2O and 0.03mol urea, is dissolved in For 25ml distilled water with the mixed solution of 25ml ethyl alcohol, ultrasonic disperse is uniform, and mixture is transferred to reaction kettle, carbon fiber is added, 8h is reacted in 120 DEG C, products therefrom is clean wash with distilled water, dry, obtains the carbon fiber of area load nickel cobalt presoma;It will 0.01mol urea is added in the porous oxidation graphene aqueous solution of 0.5mg/ml, is ultrasonically treated 6h, mixture is transferred to reaction Kettle is added the carbon fiber of nickel-loaded cobalt precursor, 8h is reacted at 160 DEG C, later the dry 12h under the conditions of 60 DEG C;Finally, will Products therefrom is heat-treated 3h in tube furnace at 300 DEG C, obtains carbon fiber/NiCo2O4/ graphene composite material.This is implemented Carbon fiber/NiCo prepared by example2O4/ graphene composite material is used for electrode of super capacitor, tests under its different current density Chemical property, when current density is 1A/g, specific capacity is up to 911.74F/g, and when current density is 10A/g, specific capacity is 742.18A/g。

Claims (10)

1. carbon fiber/NiCo2O4The preparation method of/graphene composite material, it is characterised in that:By two step hydro-thermal reactions, in carbon Fiber surface fabricated in situ NiCo2O4Nano wire, in NiCo2O4Intert porous graphene piece on nano wire, formed it is interlaced, Mutually interspersed multi-stage micro-nano structure not only plays conductive carbon fibre, NiCo2O4Respectively energy storage is special for nano wire and porous graphene Property, and multi-stage micro-nano structure can play the synergistic effect between three, improve the chemical property of composite material.
2. carbon fiber/NiCo as described in claim 12O4The preparation method of/graphene composite material, which is characterized in that specific Steps are as follows:
Step (1), by cobalt salt, nickel salt and urea are dissolved in the mixed solution of water and ethyl alcohol, and ultrasonic disperse is uniform, by mixture It is transferred to reaction kettle, the carbon fiber of activation process is added, 8~10h is reacted at 100~130 DEG C, products therefrom distilled water is clear Wash clean obtains the carbon fiber of area load nickel cobalt presoma;
Urea is added in porous oxidation graphene aqueous solution, mixture is transferred to reaction kettle after supersound process by step (2), The carbon fiber of area load nickel cobalt presoma is added, heats 6~10h under the conditions of 120 DEG C~180 DEG C, it is dry;
Sample after drying is put into tube furnace by step (3), and 1~3h is heat-treated under the conditions of 300~400 DEG C, obtains carbon Fiber/NiCo2O4/ graphene composite material.
3. carbon fiber/NiCo as claimed in claim 22O4The preparation method of/graphene composite material, which is characterized in that described Carbon fiber be carbon fiber wire or carbon fiber preform.
4. carbon fiber/NiCo as claimed in claim 22O4The preparation method of/graphene composite material, which is characterized in that described The carbon fiber of activation process be prepared by the following method to obtain:Acetone is used to carbon fiber handle except slurry first;Later Liquid phase chemical oxidation processes are carried out to carbon fiber, are washed with deionized water to neutrality, it is dry, obtain the carbon fiber of activation process.
5. carbon fiber/NiCo as claimed in claim 22O4The preparation method of/graphene composite material, which is characterized in that described In step (1), the cobalt salt is Co (NO3)2·6H2O or CoCl2·6H2O, the nickel salt are Ni (NO3)2·6H2O or NiCl2·6H2O, wherein cobalt salt:Nickel salt molar ratio is 2:1;The ratio of the mixed solution of cobalt salt, nickel salt, urea and water and ethyl alcohol Control exists:0.001~0.005mol:0.0005~0.0025mol:0.01~0.03mol:The mixing of 50ml, water and ethyl alcohol is molten The volume ratio of water and ethyl alcohol is 1 in liquid:1.
6. carbon fiber/NiCo as claimed in claim 22O4The preparation method of/graphene composite material, which is characterized in that step (2) in, the ratio of urea and porous oxidation graphene aqueous solution is 0.002~0.02mol:50ml, porous oxidation graphene water A concentration of 0.2~1mg/ml of solution;Sonication treatment time is 6h;Drying condition dry 12h under the conditions of being 60 DEG C.
7. carbon fiber/NiCo as claimed in claim 22O4The preparation method of/graphene composite material, which is characterized in that described Porous oxidation graphene be prepared by the following method to obtain:It is 1 by volume ratio:The H of 10 0.3wt%2O2Aqueous solution and 2mg/ Ml graphene oxide water solutions are uniformly mixed, and under stirring condition, are heated to 100 DEG C, are handled 4~6h, are centrifuged simultaneously cleaning sample, are obtained To porous oxidation graphene.
8. carbon fiber/NiCo as claimed in claim 52O4The preparation method of/graphene composite material, which is characterized in that cobalt The ratio control of the mixed solution of salt, nickel salt, urea and water and ethyl alcohol exists:0.004mol:0.002mol:0.024mol:50ml.
9. carbon fiber/NiCo as claimed in claim 62O4The preparation method of/graphene composite material, which is characterized in that urea Ratio with porous oxidation graphene aqueous solution is 0.003mol:50ml, porous oxidation graphene aqueous solution it is a concentration of 0.4mg/ml。
10. carbon fiber/NiCo as claimed in claim 22O4The preparation method of/graphene composite material, which is characterized in that step Suddenly in (one), 100 DEG C of reaction 10h;In step (2), 8h is reacted at 150 DEG C;In step (3), 2h is heat-treated at 300 DEG C.
CN201810081472.2A 2018-01-29 2018-01-29 Carbon fiber/NiCo2O4The preparation method of/graphene composite material Pending CN108520827A (en)

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CN110112006A (en) * 2019-05-07 2019-08-09 哈尔滨工业大学(威海) A kind of cobalt-nickel oxide/graphite flake composite material and preparation method and application
CN110508314A (en) * 2019-09-06 2019-11-29 温州涂屋信息科技有限公司 A kind of Co2N-Ni3N loads graphene oxide-carbon cloth and analyses its preparation method of oxygen material
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CN109273278A (en) * 2018-10-23 2019-01-25 陕西科技大学 A kind of preparation method of cobalt acid nickel nano wire cladding carbon fiber flexible electrode material
CN110112006A (en) * 2019-05-07 2019-08-09 哈尔滨工业大学(威海) A kind of cobalt-nickel oxide/graphite flake composite material and preparation method and application
CN110508314A (en) * 2019-09-06 2019-11-29 温州涂屋信息科技有限公司 A kind of Co2N-Ni3N loads graphene oxide-carbon cloth and analyses its preparation method of oxygen material
CN110729134A (en) * 2019-10-25 2020-01-24 陕西科技大学 Nano NiCo2O4/rGO/ANF composite film and preparation method and application thereof
CN110729134B (en) * 2019-10-25 2021-07-23 陕西科技大学 Nano NiCo2O4/rGO/ANF composite film and preparation method and application thereof
CN111764155A (en) * 2020-06-17 2020-10-13 武汉纺织大学 Two-dimensional transition metal carbide/conductive carbon fiber composite material and preparation method and application thereof
CN111764155B (en) * 2020-06-17 2022-11-04 武汉纺织大学 Two-dimensional transition metal carbide/conductive carbon fiber composite material and preparation method and application thereof
CN113213555A (en) * 2021-05-19 2021-08-06 国网天津市电力公司电力科学研究院 Needle-like NiCo2O4Preparation method of super-electric material
CN114551892A (en) * 2022-04-27 2022-05-27 浙江清华柔性电子技术研究院 Cobalt niobate oxide-loaded graphene composite material and preparation method and application thereof
CN114551892B (en) * 2022-04-27 2022-08-02 浙江清华柔性电子技术研究院 Cobalt niobate oxide-loaded graphene composite material and preparation method and application thereof

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Application publication date: 20180911