CN106531465A - Cobaltosic oxide asymmetric super capacitor used for photovoltaic energy storage and preparation method - Google Patents
Cobaltosic oxide asymmetric super capacitor used for photovoltaic energy storage and preparation method Download PDFInfo
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- UBEWDCMIDFGDOO-UHFFFAOYSA-N cobalt(2+);cobalt(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[O-2].[Co+2].[Co+3].[Co+3] UBEWDCMIDFGDOO-UHFFFAOYSA-N 0.000 title claims abstract description 67
- 238000002360 preparation method Methods 0.000 title claims abstract description 22
- 238000004146 energy storage Methods 0.000 title claims abstract description 8
- 239000003990 capacitor Substances 0.000 title abstract description 9
- 239000002071 nanotube Substances 0.000 claims abstract description 48
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 40
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 20
- 238000006243 chemical reaction Methods 0.000 claims abstract description 15
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 13
- 238000001027 hydrothermal synthesis Methods 0.000 claims abstract description 13
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000004202 carbamide Substances 0.000 claims abstract description 12
- 239000011259 mixed solution Substances 0.000 claims abstract description 9
- 238000004140 cleaning Methods 0.000 claims abstract description 8
- 238000001035 drying Methods 0.000 claims abstract description 4
- 239000006260 foam Substances 0.000 claims description 18
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical class C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 7
- 230000008021 deposition Effects 0.000 claims description 7
- 230000004044 response Effects 0.000 claims description 7
- 230000004888 barrier function Effects 0.000 claims description 6
- 239000000243 solution Substances 0.000 claims description 6
- 239000003792 electrolyte Substances 0.000 claims description 5
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 4
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 claims description 4
- 239000002270 dispersing agent Substances 0.000 claims description 4
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 2
- 238000005187 foaming Methods 0.000 abstract 2
- 229910052799 carbon Inorganic materials 0.000 abstract 1
- QGUAJWGNOXCYJF-UHFFFAOYSA-N cobalt dinitrate hexahydrate Chemical compound O.O.O.O.O.O.[Co+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O QGUAJWGNOXCYJF-UHFFFAOYSA-N 0.000 abstract 1
- 238000000926 separation method Methods 0.000 abstract 1
- 239000007772 electrode material Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 238000003384 imaging method Methods 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 229910021281 Co3O4In Inorganic materials 0.000 description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 3
- 230000004087 circulation Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 229910001416 lithium ion Inorganic materials 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000035484 reaction time Effects 0.000 description 3
- 239000003643 water by type Substances 0.000 description 3
- 229920000049 Carbon (fiber) Polymers 0.000 description 2
- 239000011149 active material Substances 0.000 description 2
- 239000004917 carbon fiber Substances 0.000 description 2
- 230000001351 cycling effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 229910021389 graphene Inorganic materials 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 238000006479 redox reaction Methods 0.000 description 2
- 241001025261 Neoraja caerulea Species 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/84—Processes for the manufacture of hybrid or EDL capacitors, or components thereof
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/22—Electrodes
- H01G11/30—Electrodes characterised by their material
- H01G11/32—Carbon-based
- H01G11/34—Carbon-based characterised by carbonisation or activation of carbon
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/22—Electrodes
- H01G11/30—Electrodes characterised by their material
- H01G11/46—Metal oxides
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/84—Processes for the manufacture of hybrid or EDL capacitors, or components thereof
- H01G11/86—Processes for the manufacture of hybrid or EDL capacitors, or components thereof specially adapted for electrodes
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Electric Double-Layer Capacitors Or The Like (AREA)
- Carbon And Carbon Compounds (AREA)
- Hybrid Cells (AREA)
Abstract
The invention provides a Co3O4 asymmetric super capacitor used for photovoltaic energy storage and a preparation method thereof. The preparation method comprises following steps of S1, preparing a Co3O4 nano tube electrode, adding a mixed solution of Co(NO3)2.6H2O and urea, and foaming nickel into a reaction kettle to carry out a hydro-thermal reaction, after the reaction kettle is cooled, cleaning a sample and drying to obtain and take the foaming nickel deposited with a Co3O4 nano tube array as a Co3O4 nano tube electrode; and S2, assembling an asymmetric super capacitor, taking the Co3O4 nano tube electrode as a positive electrode, taking an active carbon electrode as a negative electrode and separating the positive electrode and the negative electrode with a separation film. According to the invention, the prepared asymmetric super capacitor is green, environmentally friendly, low in cost and excellent in performance.
Description
Technical field
The invention belongs to supercapacitor technologies field, more particularly to a kind of Co that can be used for photovoltaic energy storage3O4It is asymmetric super
Level capacitor and preparation method
Background technology
In recent years, energy shortage and problem of environmental pollution become the obstacle for hindering social development.So that more and more grinding
Study carefully personnel and take to the research and development with new green power association area.And solar energy endlessly irradiates ground because of which
Face, and clean and without any pollution, while with the raising of solar panel conversion efficiency so that solar energy becomes emerging energy
The developing way in source.
High performance energy storage device becomes the important support point of solar energy development.Currently used energy is deposited
Storage equipment has lithium ion battery and ultracapacitor.And lithium ion battery is by chemical reaction storage energy.Due to discharge and recharge
Speed is slow, the irreversible effect that chemical reaction is produced.So that producing not to lithium ion battery when using solar recharging
Recoverable damage.And ultracapacitor is storing electric charge, can to receive at short notice by electrode interface Electrostatic Absorption
The large current charge of solar energy, so as to as energy stores and buffer unit.Co3O4Due to high theoretical specific capacity (about 3560F g-1), high conductivity, ABUNDANT NATUREAL RESOURSES, environmental friendliness, the advantages of be readily synthesized, become a kind of depth interested by researcher
Electrode material.However, how to develop the Co of a kind of process is simple and excellent performance3O4Ultracapacitor is also that this area is faced
One of technical problem.
The content of the invention
It is an object of the invention to provide a kind of Co of preparation process is simple3O4Asymmetric Supercapacitor preparation method, should
Method preparation process is simple, and the Co for preparing3O4Asymmetric Supercapacitor environmental protection, cheap and excellent performance, should
Co3O4Asymmetric Supercapacitor can apply to photovoltaic energy storage.
, to reach its purpose, the technical scheme of employing is as follows for the present invention：
A kind of Co3O4The preparation method of Asymmetric Supercapacitor, comprises the steps,
S1, preparation Co3O4Nanotube electrode：By Co (NO3)2·6H2The mixed solution and nickel foam of O and urea is added to
Hydro-thermal reaction is carried out in reactor, cleaning sample after the cooling of question response kettle is dried, and obtaining deposition has Co3O4The bubble of nano-tube array
Foam nickel, as Co3O4Nanotube electrode；
S2, assembling Asymmetric Supercapacitor：With Co3O4Nanotube electrode is positive pole, with activated carbon electrodes as negative pole,
Separated with barrier film between positive pole, negative pole.
Preferably, Co (NO in the mixed solution3)2·6H2O concentration be 25～75mmol/L, urea concentration be 250～
375mmol/L。
Preferably, the temperature of the hydro-thermal reaction be 80～110 DEG C, the time of reaction be 6～12h.By the preferred stripe
Co prepared by part3O4Nanotube electrode, its Co3O4Nanotube length be 0.9～1.2 μm, internal-and external diameter respectively may be about 60nm and
120nm, Co3O4Nanometer tube thickness is about 17nm, less than electrolyte in penetration depth 20nm of electrode material surface, shortens ion
Diffusion length, the active material of nanotube is participated in electrochemical redox reaction completely.
Preferably, the temperature of the drying be 60～100 DEG C, drying time be 8-20h.
Used as a kind of preferred version, the activated carbon electrodes are prepared in accordance with the following steps：By activated carbon, acetylene and and poly- inclined
PVF is according to 5-10: 1: 1 mass ratio mixing, adds alcohol to stir evenly as dispersant, and even application is in nickel foam
In substrate.
Used as a kind of specific embodiment, the barrier film material is PET.
As a kind of preferred embodiment, in step S2, it is 3～6M KOH to assemble the electrolyte used by Asymmetric Supercapacitor
Solution.
Second aspect present invention provides a kind of Co3O4Asymmetric Supercapacitor, preparation method system as described above
.The Asymmetric Supercapacitor of gained is referred to as Co3O4//AC Asymmetric Supercapacitors.The Asymmetric Supercapacitor is in electricity
Current density 2.5mA cm-2Under can obtain high-energy-density 55.4Whkg-1, in 20mA cm-2High power is obtained under current density close
Degree 4490Wkg-1。
It is further preferred that Asymmetric Supercapacitor mentioned above, its Co3O4Nanotube electrode is preferably using as follows
It is prepared by step：By Co (NO3)2·6H2The mixed solution and nickel foam of O and urea carries out hydro-thermal reaction in being added to reactor,
Cleaning sample after the cooling of question response kettle, is dried, and obtaining deposition has Co3O4The nickel foam of nano-tube array, as Co3O4Nanotube
Electrode；Wherein, Co (NO in mixed solution3)2·6H2O concentration is 1～3mmol, urea concentration is 10～15mmol；Hydro-thermal reaction
Temperature be 80～110 DEG C, the time of reaction be 6～12h.By the preferred version, the Asymmetric Supercapacitor for being obtained
Comprehensive newly energy is good, and good cycling stability, in 20mA cm-2Circulate 36000 times under current density, specific capacity remains to keep
90.4%.
Asymmetric Supercapacitor mentioned above can be in the application in photovoltaic energy storage field.
The technical scheme that the present invention is provided has the advantages that：
(1) present invention prepares Co using hydrothermal growth technology3O4Nanotube electrode, with process is simple, easy to operate spy
Point.From Co3O4Make electrode material, the characteristics of with aboundresources, active either high redox, high specific capacity.
(2) Co prepared in preferred version of the present invention3O4In nanotube electrode, Co3O4Nanotube length is 0.9～1.2 μ
M, internal-and external diameter respectively may be about 60nm and 120nm；
(3) in preferred version of the present invention, Co3O4Nanometer tube thickness is about 17nm, less than electrolyte in electrode material surface
Penetration depth 20nm, shortens the diffusion length of ion, makes the active material of nanotube participate in electrochemical redox reaction completely；
(4) Co of the invention3O4//AC Asymmetric Supercapacitors are in current density 2.5mA cm-2Under can obtain high-energy
Density 55.4Whkg-1；In 20mA cm-2High power density 4490Wkg is obtained under current density-1；
(5) present invention can obtain the Co with preferable cyclical stability3O4//AC Asymmetric Supercapacitors, preferred side
Asymmetric Supercapacitor obtained in case, in 20mA cm-2Circulate 36000 times under current density, specific capacity remains to keep
90.4%；
(6) Co of the invention3O4//AC Asymmetric Supercapacitors are applicable to solar panel and fill soon, solar-electricity
Pond plate is 20s or so full of the ultracapacitor time, and do not exist fill soon during overheated, blast equivalent risk, be a kind of safety
Property the high, Asymmetric Supercapacitor of environmental protection；
(7) tests prove that, the 3cm of 4 series connection2Co3O4//AC Asymmetric Supercapacitors group one bright blue-ray LED of point
The time of lamp is 12min, and its application performance is good.
Description of the drawings
Fig. 1 is Co in inventive embodiments 43O4//AC Asymmetric Supercapacitor 20mA cm-2Current density is lower 36000 times
Cycle life figure；
Fig. 2 is Co in inventive embodiments 43O4//Co3O4, the symmetrical ultracapacitors of AC//AC and Co3O4//AC is asymmetric super
The graph of a relation of level capacitor power density and energy density；
It is embodiment of the present invention 1Co that (a) is schemed in Fig. 33O4The scanning electron scanning imaging figure of nanotube, figure (b) is the present invention
Co in embodiment 13O4The transmitted electron imaging figure of nanotube.
Specific embodiment
Technical scheme is described further with specific embodiment below in conjunction with the accompanying drawings：
The present invention provides a kind of Co3O4Asymmetric Supercapacitor, with Co3O4Nanotube electrode is positive pole, with activated carbon electricity
Extremely negative pole, is separated with barrier film between positive pole, negative pole, with 3～6M KOH solutions as electrolyte.
Preferably, Co therein3O4Nanotube electrode, is prepared by hydro-thermal method, and concrete preparation method is：By Co
(NO3)2·6H2The mixed solution and nickel foam of O and urea carries out hydro-thermal reaction in being added to reactor, after the cooling of question response kettle
Cleaning sample, is dried, and obtaining deposition has Co3O4The nickel foam of nano-tube array, as Co3O4Nanotube electrode.Wherein, preferably
, Co (NO in mixed solution3)2·6H2O concentration is 25～75mmol/L, urea concentration is 250～375mmol/L.Preferably,
The temperature of hydro-thermal reaction is 80～110 DEG C, the time of reaction is 6～12h.Preferably, baking temperature is 60～100 DEG C, is dried
Time is 8-20h.
Wherein, activated carbon electrodes are preferably prepared in accordance with the following steps：By activated carbon, acetylene and with Kynoar according to 5-
10: 1: 1 mass ratio mixing, adds alcohol to stir evenly as dispersant, and even application is in foam nickel base.
Technical scheme is further illustrated below by specific embodiment.
Embodiment 1
A kind of Co3O4Nanotube electrode, is prepared in accordance with the following steps：By 0.727g Co (NO3)2·6H2O and 0.7g urea
It is well mixed in 40mL ultra-pure waters, then nickel foam is added in inner liner of reaction kettle carries out hydro-thermal reaction, reaction temperature is 90
DEG C, the reaction time is 10h；Cleaning sample after the cooling of question response kettle, 60 DEG C are dried 12h, and obtaining deposition has Co3O4Nano-tube array
Nickel foam, as Co3O4Nanotube electrode material.After testing, prepared Co3O4In nanotube electrode, Co3O4Nanometer pipe range
Spend for 0.9～1.2 μm, internal-and external diameter respectively may be about 60nm and 120nm, Co3O4Nanometer tube thickness is about 17nm.Obtained by embodiment 1
Co3O4Referring to Fig. 3, figure (a) therein is this Co to the scanning electron scanning imaging figure of nanotube3O4The scanning electron of nanotube is swept
Imaging figure is retouched, figure (b) is Co3O4The transmitted electron imaging figure of nanotube.
Embodiment 2
A kind of Co3O4Nanotube electrode, is prepared in accordance with the following steps：By 1mmol Co (NO3)2·6H2O and 10mmol urea
It is well mixed in 40mL ultra-pure waters, then nickel foam is added in inner liner of reaction kettle carries out hydro-thermal reaction, reaction temperature is 80
DEG C, the reaction time is 12h；Cleaning sample after the cooling of question response kettle, 90 DEG C are dried 9h, and obtaining deposition has Co3O4Nano-tube array
Nickel foam, as Co3O4Nanotube electrode material.After testing, prepared Co3O4In nanotube electrode, Co3O4Nanotube length
For 0.9～1.2 μm, internal-and external diameter respectively may be about 60nm and 120nm, Co3O4Nanometer tube thickness is less than 20nm.
Embodiment 3
A kind of Co3O4Nanotube electrode, is prepared in accordance with the following steps：By 3mmol Co (NO3)2·6H2O and 15mmol urea
It is well mixed in 40mL ultra-pure waters, then nickel foam is added in inner liner of reaction kettle carries out hydro-thermal reaction, reaction temperature is 110
DEG C, the reaction time is 6h；Cleaning sample after the cooling of question response kettle, 100 DEG C are dried 8h, and obtaining deposition has Co3O4Nano-tube array
Nickel foam, as Co3O4Nanotube electrode material.After testing, prepared Co3O4In nanotube electrode, Co3O4Nanotube length
For 0.9～1.2 μm, internal-and external diameter respectively may be about 60nm and 120nm, Co3O4Nanometer tube thickness is less than 20nm.
Embodiment 4
A kind of Co3O4//AC Asymmetric Supercapacitors, are prepared in accordance with the following steps：With embodiment 1 in 3M KOH solutions
Prepared Co3O4Nanotube electrode is positive pole, activated carbon electrodes are negative pole, PET is barrier film, is assembled into asymmetric super capacitor
Device.Wherein, activated carbon electrodes are prepared in accordance with the following steps：By activated carbon, acetylene and Kynoar according to 8: 1: 1 mass ratio
Example mixing, adds alcohol to stir evenly as dispersant, and even application is in foam nickel base.
Solar energy is filled soon to the ultracapacitor of embodiment 4：Solar panel (5.5V, 270mA) is to 4 series connection
Co3O4//AC Asymmetric Supercapacitor groups are charged, and are 20s or so full of the ultracapacitor time, and do not exist and filled soon
Overheated in journey, blast equivalent risk,
The application of 4 ultracapacitor of embodiment：The 3cm of 4 series connection2Co3O4//AC Asymmetric Supercapacitors group can drive
Motor (3V, 40mA) runs, while can also light blue LED lamp, the time is 12min.
Co prepared by embodiment 43O4//AC Asymmetric Supercapacitors are in 20mA cm-2Lower 36000 circulations of current density
Life-span is as shown in figure 1, it can be seen that in 20mA cm-2Circulate 36000 times under current density, specific capacity remains to keep
90.4%, good cyclical stability is showed, than the asymmetric capacitor good cycling stability of other cobalt-based classes, such as Co3O4/
Graphene/carbon fiber //Co3O4The symmetrical ultracapacitor of/graphene/carbon fiber is in 20A g-120000 capacity of circulation retain
86.2% (from following document Liao, Q.et al., ACS Nano, 2015,9 (5), 5310-5317).
With reference to the method assembling Co of embodiment 43O4//Co3O4, the symmetrical ultracapacitors of AC//AC, and with embodiment 4
Co3O4//AC Asymmetric Supercapacitors carry out Performance comparision：The power density of three contrast with energy density as shown in Fig. 2 from
As can be seen that Co in figure3O4//AC Asymmetric Supercapacitors power density is 718.7W kg-1、1375.3W kg-1、
2547.6W kg-1、3589.1W kg-1、4490.0W kg-1The corresponding energy density of difference is 55.4Wh kg-1、48.4Wh kg-1、38.1Wh kg-1、30.9Wh kg-1、26.3Wh kg-1.In current density 2.5mA cm-2Obtain high-energy-density 55.4Wh
kg-1, in 20mA cm-2High power density 4490.0w kg is obtained under current density-1.Compare Co3O4//Co3O4, AC//AC symmetrically surpasses
Level capacitor energy density and power density are high.
Using the Co of embodiment 2,33O4The method Co that prepare of the nanotube electrode with reference to embodiment 43O4//AC is non-right
Claim ultracapacitor, by performance detection, discovery is similar with the testing result of embodiment 4, and this is no longer repeated one by one.
It can be seen that, the invention provides a kind of Co of process is simple3O4Nanotube electrode preparation method, and obtained Co3O4Receive
Mitron electrode is cheap.Using Asymmetric Supercapacitor excellent performance obtained in the electrode, not only with circulation well
Stability, and can be filled with solar panel soon, application performance is good, safe.
The above, is only presently preferred embodiments of the present invention, and any pro forma restriction is not done to the present invention, therefore
All contents without departing from technical solution of the present invention, any simply repair to made for any of the above embodiments according to the technical spirit of the present invention
Change, equivalent variations and modification, still fall within the range of technical solution of the present invention.
Claims (9)
1. a kind of Co3O4The preparation method of Asymmetric Supercapacitor, it is characterised in that comprise the steps,
S1, preparation Co3O4Nanotube electrode：By Co (NO3)2·6H2The mixed solution and nickel foam of O and urea is added to reaction
Hydro-thermal reaction is carried out in kettle, cleaning sample after the cooling of question response kettle is dried, and obtaining deposition has Co3O4The foam of nano-tube array
Nickel, as Co3O4Nanotube electrode；
S2, assembling Asymmetric Supercapacitor：With Co3O4Nanotube electrode is positive pole, with activated carbon electrodes as negative pole, positive pole,
Separated with barrier film between negative pole.
2. preparation method according to claim 1, it is characterised in that Co (NO in the mixed solution3)2·6H2O concentration
It is 250～375mmol/L for 25～75mmol/L, urea concentration.
3. preparation method according to claim 1, it is characterised in that the temperature of the hydro-thermal reaction is 80～110 DEG C, anti-
The time answered is 6～12h.
4. preparation method according to claim 1, it is characterised in that the temperature of the drying is 60～100 DEG C, when being dried
Between be 8-20h.
5. preparation method according to claim 1, it is characterised in that the activated carbon electrodes are prepared in accordance with the following steps：
By activated carbon, acetylene and with Kynoar according to 5-10: the mixing of 1: 1 mass ratio, add alcohol as dispersant
Stir evenly, even application is in foam nickel base.
6. preparation method according to claim 1, it is characterised in that the barrier film material is PET.
7. preparation method according to claim 1, it is characterised in that in step S2, assembles Asymmetric Supercapacitor institute
Electrolyte is 3～6M KOH solutions.
8. a kind of Co3O4Asymmetric Supercapacitor, it is characterised in that according to the preparation method described in any one of claim 1-7
It is obtained.
9. application of the Asymmetric Supercapacitor described in claim 8 in photovoltaic energy storage field.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107104003A (en) * | 2017-05-22 | 2017-08-29 | 华北电力大学（保定） | A kind of flexible electrode, its preparation method and ultracapacitor |
| CN107564736A (en) * | 2017-07-31 | 2018-01-09 | 西北工业大学 | The preparation method of all solid state asymmetric capacitor |
| CN108390014A (en) * | 2018-01-08 | 2018-08-10 | 华南师范大学 | The preparation method of foamed nickel supported different-shape cobalt black nano material |
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| CN110649257A (en) * | 2019-09-10 | 2020-01-03 | 长沙学院 | Electrode material with porous hollow nanotube structure, preparation method thereof, cathode and lithium ion battery |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107104003A (en) * | 2017-05-22 | 2017-08-29 | 华北电力大学（保定） | A kind of flexible electrode, its preparation method and ultracapacitor |
| CN107564736A (en) * | 2017-07-31 | 2018-01-09 | 西北工业大学 | The preparation method of all solid state asymmetric capacitor |
| CN108390014A (en) * | 2018-01-08 | 2018-08-10 | 华南师范大学 | The preparation method of foamed nickel supported different-shape cobalt black nano material |
| CN108390014B (en) * | 2018-01-08 | 2022-05-31 | 华南师范大学 | Preparation method of foam nickel loaded cobalt monoxide nano material with different morphologies |
| CN109659166A (en) * | 2018-12-28 | 2019-04-19 | 上海理工大学 | Cobaltosic oxide electrode and the preparation method that asymmetric electrode is formed with active carbon |
| CN110649257A (en) * | 2019-09-10 | 2020-01-03 | 长沙学院 | Electrode material with porous hollow nanotube structure, preparation method thereof, cathode and lithium ion battery |
| CN111139511A (en) * | 2020-01-20 | 2020-05-12 | 烟台大学 | Cobaltosic oxide nanotube array assembled by anodic oxidation method and method |
| CN111139511B (en) * | 2020-01-20 | 2021-06-29 | 烟台大学 | Cobaltosic oxide nanotube array assembled by anodic oxidation method and method |
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