CN106006576A - Nanomaterial used as supercapacitor electrode material, and preparation method thereof - Google Patents
Nanomaterial used as supercapacitor electrode material, and preparation method thereof Download PDFInfo
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- 239000002086 nanomaterial Substances 0.000 title claims abstract description 66
- 239000007772 electrode material Substances 0.000 title claims abstract description 37
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 claims abstract description 5
- 239000003990 capacitor Substances 0.000 claims description 21
- 238000006243 chemical reaction Methods 0.000 claims description 13
- 239000002994 raw material Substances 0.000 claims description 9
- NWZSZGALRFJKBT-KNIFDHDWSA-N (2s)-2,6-diaminohexanoic acid;(2s)-2-hydroxybutanedioic acid Chemical compound OC(=O)[C@@H](O)CC(O)=O.NCCCC[C@H](N)C(O)=O NWZSZGALRFJKBT-KNIFDHDWSA-N 0.000 claims description 8
- 239000008367 deionised water Substances 0.000 claims description 8
- 229910021641 deionized water Inorganic materials 0.000 claims description 8
- IKDUDTNKRLTJSI-UHFFFAOYSA-N hydrazine monohydrate Substances O.NN IKDUDTNKRLTJSI-UHFFFAOYSA-N 0.000 claims description 8
- 238000001027 hydrothermal synthesis Methods 0.000 claims description 8
- 230000004044 response Effects 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 230000015572 biosynthetic process Effects 0.000 claims description 7
- 239000000126 substance Substances 0.000 claims description 7
- 239000000758 substrate Substances 0.000 claims description 7
- 239000012467 final product Substances 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- 229910003424 Na2SeO3 Inorganic materials 0.000 claims description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical group [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 4
- 239000011781 sodium selenite Substances 0.000 claims description 4
- 239000006260 foam Substances 0.000 claims description 2
- 229910052759 nickel Inorganic materials 0.000 claims description 2
- 239000003792 electrolyte Substances 0.000 abstract description 5
- 230000008901 benefit Effects 0.000 abstract description 4
- 238000012546 transfer Methods 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 abstract description 3
- 239000002135 nanosheet Substances 0.000 abstract description 3
- 239000004094 surface-active agent Substances 0.000 abstract description 2
- 238000009776 industrial production Methods 0.000 abstract 1
- 238000012360 testing method Methods 0.000 description 14
- 239000000463 material Substances 0.000 description 13
- 230000000694 effects Effects 0.000 description 6
- 238000011161 development Methods 0.000 description 5
- 238000004146 energy storage Methods 0.000 description 5
- 229910018143 SeO3 Inorganic materials 0.000 description 4
- -1 Cobaltous selenide Chemical class 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- 150000003346 selenoethers Chemical class 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 2
- 238000002441 X-ray diffraction Methods 0.000 description 2
- 239000013543 active substance Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000005253 cladding Methods 0.000 description 2
- 239000002322 conducting polymer Substances 0.000 description 2
- 229920001940 conductive polymer Polymers 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 238000003487 electrochemical reaction Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000002070 nanowire Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 229910021094 Co(NO3)2-6H2O Inorganic materials 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
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- 230000001413 cellular effect Effects 0.000 description 1
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- 239000013064 chemical raw material Substances 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
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- 230000005518 electrochemistry Effects 0.000 description 1
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- 239000002803 fossil fuel Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000001453 impedance spectrum Methods 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
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- 238000011160 research Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
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Classifications
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B19/00—Selenium; Tellurium; Compounds thereof
- C01B19/007—Tellurides or selenides of metals
-
- 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
- H01G11/24—Electrodes 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
-
- 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
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2002/00—Crystal-structural characteristics
- C01P2002/70—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data
- C01P2002/72—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data by d-values or two theta-values, e.g. as X-ray diagram
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/01—Particle morphology depicted by an image
- C01P2004/03—Particle morphology depicted by an image obtained by SEM
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/01—Particle morphology depicted by an image
- C01P2004/04—Particle morphology depicted by an image obtained by TEM, STEM, STM or AFM
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/40—Electric properties
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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
- 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)
- Chemical & Material Sciences (AREA)
- Power Engineering (AREA)
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- Microelectronics & Electronic Packaging (AREA)
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- Electric Double-Layer Capacitors Or The Like (AREA)
Abstract
The invention discloses a Co0.85Se nanomaterial used as a supercapacitor electrode material, and a preparation method thereof. The nanometerial is a connected space hole-containing three-dimensional porous nanostructure formed through interlacing nanosheets. The Co0.85Se nanomaterial is synthesized through a one-step hydrothermal technology without using an organic template or a surfactant, so the method has the advantages of simple preparation, energy saving, and suitableness for industrial production. A Co0.85Se nanomaterial electrode containing the synthesized nanosheet structure is tested in a three-electrode system, a KOH solution is adopted as an electrolyte, the electrode nanomaterial has a high specific capacity of 1528F/g at a current density of 1A/g and still keeps 90% or above of the initial capacitance after 5000 frequency cycle charge and discharge at a high current of 10A/g, the internal resistance of the electrode nanomaterial is 1.4omega/cm<2>, and the charge transfer impedance is 0.73omega/cm<2>. The Co0.85Se electrode nanomaterial has the advantages of large specific surface area, high specific capacitance, good cycle performances, simple preparation cost and low cost.
Description
Technical field
The present invention relates to electrode material for super capacitor, particularly relate to the electrode material field of the selenides ultracapacitor of nanostructured.
Background technology
The energy is the basis that human society is depended on for existence and development.Along with the progress of science and technology and improving constantly of socioeconomic development and living standard, the mankind are growing to energy demand.Since entering new century, continuous consumption along with non-renewable energy resources such as oil, natural gas and coals, contradiction between economic development and energy resource supply is substantially aggravated, and owing to the environmental problems such as the greenhouse effect that combustion of fossil fuel causes also become increasingly conspicuous, in order to improve the ecological environment, realizing the sustainable development of society, the center of gravity of the energy resource supply structure of human society will be gradually to the cleanings such as wind energy, solar energy, tide energy and the transfer of reproducible new forms of energy form.The newest energy and new energy storage and occupation mode are needed badly and are developed, and to solve existing crisis, meet new growth requirement.In energy storage and energy supply, traditional battery and capacitor cannot provide high-energy-density and high power density simultaneously, thus cannot meet the demand of use.Ultracapacitor is a kind of novel energy storage device, have that power density is high, the charging interval is short, have extended cycle life, the advantage such as environmental protection, and there is higher energy density, can be applicable on energy storage device, dynamic power system and many electronic equipments, be expected to become the energy storage tool of a new generation.
Electrode material be the core of ultracapacitor with crucial, the performance of ultracapacitor mainly forming and structures shape by electrode active material, the selection of new material, rational structure are designed to be effectively improved the chemical property of electrode.At present, electrode material for super capacitor mainly has material with carbon element, conducting polymer, oxide, sulfide etc., but these materials are all respectively arranged with shortcoming, as material with carbon element is lower than electric capacity, conducting polymer cyclical stability is poor, oxide resistor rate is high, and sulfide also has a shortcoming that resistivity is higher, thus find a kind of high specific capacitance, low-resistivity, the electrode material for super capacitor of good circulation stability become the target of people's research and industrialization.
Selenides is a kind of potential super capacitor material, and current people are the most rare for the research and development of electrode material for super capacitor to selenides, rarely have report.Cobaltous selenide all has advantage in capacitance and electric conductivity, and its highly active surface is also beneficial to being obviously improved of chemical property, thus cobaltous selenide would is that a kind of electrode material for super capacitor with excellent properties, will cause the extensive concern of people.At present, researchers by several limited by the way of tentatively synthesize nanometer sheet based on cobaltous selenide and the nanostructured of nanotube, its characterize capacitance size ratio electric capacity be about 200F/g-300F/g.In the case of electrode material composition determines, its rational structure is designed to be effectively improved the chemical property of electrode, such as obtain higher specific surface area and can increase the contact area of electrode active material and electrolyte, specific membrane structure is also beneficial to promote the electro-chemical activity of material, thus effectively improve the utilization rate of active substance, then put forward many chemical property indexs such as high specific capacitance.It addition, seek the electrode material preparation method of low cost, methods simplification, the industrialization for ultracapacitor is also the most necessary.The Co of present invention synthesis0.85Se three-dimensional porous nano structure has electrochemistry high rate performance and the stable circulation performance of excellence, and operation is simple, provides new more preferable selection for super capacitor material, it is expected to be greatly facilitated the development of ultracapacitor, expand its application.
Summary of the invention
As the exploration of the electrode material for super capacitor of a kind of excellent properties, it is contemplated that designed by rational material microstructure, a kind of preparation method simple to operate, low cost is used to realize electrode material for super capacitor Co0.85The multidimensional structure of Se nano material, the effective specific surface area improving electrode material and space availability ratio, thus promote the ratio electric capacity of electrode material.
The invention provides a kind of nano material as electrode material for super capacitor, described nano material chemical formula is Co0.85Se, and this Co0.85Se nano material contains the three-dimensional porous nano structure of the space hole of connection for the interlaced formation of nanometer sheet.The present invention is designed by rational material microstructure, and use feasible preparation method this nanostructured to be realized, the nanostructured of multidimensional adds the specific surface area of electrode and electrode material and the attaching space of electrolyte, reaches to be effectively improved the effect of the ratio electric capacity of electrode material.
Further, Co0.85Se nano material is by pure Co0.85Se nanometer sheet forms, and nanometer sheet thickness is less than 10nm.Nanotopography controls, it is directly connected to this material as cladding thickness on a current collector during electrode of super capacitor, the increase of cladding thickness directly increases the load thickness of electrode active material, and this will improve the capacitance of unit are collector undoubtedly, the capacitive property improving ultracapacitor is played significant effect.
Further, the Co that the present invention prepares0.85Se nano material, in ultracapacitor three-electrode system is tested, reaches 1223～1528F/g than capacitance, has the most excellent ratio electric capacity.
Present invention also offers and prepare above-mentioned Co0.85The method of Se nano material, comprises the steps: raw material Co (NO3)2·6H2O 、Na2SeO3Being dissolved under deionized water, room temperature stirs is placed in reactor, adds quantitative hydrazine hydrate, immerses the substrate in the solution in reactor afterwards, is then placed in baking oven by this reactor and carries out hydrothermal synthesis reaction, obtains final product Co0.85Se nano material.
Further, in step, reactor carries out the temperature of hydrothermal synthesis reaction in an oven and is 120-160 DEG C, and the response time is 24 hours.Reaction temperature and response time are directly connected to be formed the control of nanotopography, and reaction temperature is too low can not form required nanostructured；And reaction temperature is too high, then nanometer sheet structure can be transformed into other morphosiss；The control in same response time is the most critically important, and the time is too short, and nano wire formation amount is very few, it is impossible to reach to meet the loading demand of electrode of super capacitor active substance,；And the response time is long, nano thread structure also can change, and is transformed into other morphosiss, thus reduces specific surface area.
Further, raw material Co (NO in step3)2·6H2O 、Na2SeO3Mol ratio be 1: 1, amount be 6-10ml, deionized water is 72ml, controls the proportioning of these several raw materials, and the amount that especially reducing agent hydrazine hydrate adds, the formation to material nano pattern is most important.
Further, the Co of the cellular nanometer sheet structure of formation0.85Se nano material, nanometer sheet thickness is less than 10nm, the diffusion of the space pore space structure that the interlaced formation of nanometer sheet connects in a large number, beneficially ion and migration, huge specific surface area is conducive to the absorption of ion, it is ensured that be subsequently formed the bigger serface structure electrode material of high capacitance performance.
Further, above-mentioned preparation process uses the nickel foam with three-dimensional porous structure as substrate, with the specific surface area of the most maximized increase electrode material, improves space availability ratio.
The useful achievement of the present invention is:
1) present invention is designed by rational material microstructure, uses preparation method simple to operate, low cost to realize Co0.85The multidimensional structure of Se nanometer, prepared Co0.85Se nano material is by the three-dimensional porous nano structure of the interlaced space hole formed containing connection of nanometer sheet, and nanometer sheet thickness is less than 10nm.The diffusion of the space pore space structure that the interlaced formation of nanometer sheet connects in a large number, beneficially ion, migrate and adsorb.The form that this nanostructured is formed adds the specific surface area of electrode and electrode material and the attaching space of electrolyte so that the Co of internal layer0.85Se nanometer sheet also is able to participate directly in electrochemical reaction without by outer layer Co0.85Se shields, reach to be effectively improved the effect of the ratio electric capacity of electrode material.
2) Co prepared by the present invention0.85Se nano material demonstrates the most excellent ratio electric capacity in the electrode test be applied to ultracapacitor, tests under the conditions of constant current density is 1A/g, and it can reach 1258F/g than electric capacity；And its charge-discharge performance is good, under electric current density is 10A/g, through the charge and discharge cycles of 5000 times, remain to keep the ratio capacitance of more than 90%；The Co that the present invention prepares simultaneously0.85When Se nano-electrode material is applied to ultracapacitor, also having relatively low internal resistance and Charge-transfer resistance, its test value is respectively 1.4 Ω/cm2With 0.73 Ω/cm2。
3) method that the present invention uses Hydrothermal Synthesis, raw material is easy to get, equipment cost is low, simple to operate, it is not necessary to uses organic formwork and surfactant, is very suitable for industrialized batch production.
Accompanying drawing explanation
The Co that Fig. 1 embodiment 1 prepares0.85Low power scanning electron microscope (SEM) figure of Se nano material.
The Co that Fig. 2 embodiment 1 prepares0.85High power scanning electron microscope (SEM) figure of Se nano material.
The Co that Fig. 3 embodiment 1 prepares0.85Transmission electron microscope (TEM) figure of Se nano material.
The Co that Fig. 4 embodiment 1 prepares0.85The X-ray diffractogram of Se nano material.
The Co that Fig. 5 embodiment 1 prepares0.85Se nano material electrode cycle charge-discharge curve.
The Co that Fig. 6 embodiment 1 prepares0.85The constant current charge-discharge curve of Se nano material electrode.
The Co that Fig. 7 embodiment 2 prepares0.85The constant current charge-discharge curve of Se nano material electrode.
The Co that Fig. 8 embodiment 3 prepares0.85The constant current charge-discharge curve of Se nano material electrode.
The Co that Fig. 9 embodiment 1 prepares0.85Se rice material electrodes AC impedance spectrogram.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is further illustrated.
Embodiment 1
By raw material 1mmolCo (NO3)2·6H2O and 1mmolNa2SeO3It is dissolved in 72ml deionized water, stir under room temperature and be placed in reactor, add 8ml hydrazine hydrate, immerse the substrate in the solution in reactor afterwards, then this reactor is placed in baking oven and carries out hydrothermal synthesis reaction, reaction temperature is 140 DEG C, and the response time is 24 hours, obtains final product Co0.85Se nano material.
Embodiment 2
By raw material 2mmolCo (NO3)2·6H2O and 2mmolNa2SeO3It is dissolved in 72ml deionized water, stir under room temperature and be placed in reactor, add 10ml hydrazine hydrate, immerse the substrate in the solution in reactor afterwards, then this reactor is placed in baking oven and carries out hydrothermal synthesis reaction, reaction temperature is 160 DEG C, and the response time is 24 hours, obtains final product Co0.85Se nano material.
Embodiment 3
By raw material 0.5mmolCo (NO3)2·6H2O and 0.5mmolNa2SeO3It is dissolved in 72ml deionized water, stir under room temperature and be placed in reactor, add 6ml hydrazine hydrate, immerse the substrate in the solution in reactor afterwards, then this reactor is placed in baking oven and carries out hydrothermal synthesis reaction, reaction temperature is 120 DEG C, and the response time is 24 hours, obtains final product Co0.85Se nano material.
Chemical raw material Co (NO3) 2 6H2O, the Na used in above example2SeO3, hydrazine hydrate be analytical pure, deionized water resistance is 18.0～18.5M Ω.
Performance test:
1) SEM test: by final for the various embodiments described above preparation Co prepared0.85Se nano material is observed under low power and high power SEM scanning electron microscope.It is respectively the Co that embodiment 1 prepares as shown in Figure 1, Figure 20.85The low power of Se nano material and high power scanning electron microscope (SEM) photograph, it can be seen that Co in figure0.85The distribution densification of Se nano material presents the structure of nano-sheet, and the interlaced formation of nanometer sheet contains the three-dimensional porous nano structure of space hole of connection.The form that this nanostructured is formed adds the specific surface area of electrode and electrode material and the attaching space of electrolyte so that the Co of internal layer0.85Se nanometer sheet also is able to participate directly in electrochemical reaction without by outer layer Co0.85Se shields, and reaches to be effectively improved the effect of the ratio electric capacity of electrode material.
2) TEM test: by final for the various embodiments described above preparation Co prepared0.85Se nano material is observed under transmission electron microscope (TEM).If Fig. 3 is the Co that embodiment 1 prepares0.85The transmission electron microscope picture of Se nano material, can become apparent from finds out Co0.85Se nano material is flaky nanometer structure.
3) XRD test: by final for the various embodiments described above preparation Co prepared0.85Se nano material carries out X-ray diffraction (XRD) test, the Co prepared such as Fig. 4 embodiment 10.85The X-ray diffractogram that Se nano wire sample test obtains, PDF card 52-1008 correspondence hexagonal crystal phase Co in figure0.85Se, therefore deduces that, this nano material is by pure Co0.85Se phase composition.
4) cycle charge discharge electrical testing: the Co that the various embodiments described above are finally prepared0.85Se nano material is respectively prepared electrode slice and is assembled into three-electrode system and carries out charge and discharge cycles test.If Fig. 5 is the Co that embodiment 1 prepares0.85Se nano-electrode material is at the cycle charge-discharge curve that electric current density is during 10A/g, it can be seen that this Co0.85After Se nano material electrode circulates 5000 times, remain to keep the specific volume of more than 90%.
5) than capacity measurement: the Co that the various embodiments described above are finally prepared0.85Se nano material is respectively prepared electrode slice and is assembled into three-electrode system and carries out constant current charge-discharge test, and electric current density is to test, if accompanying drawing 6 be the prepared Co of embodiment 1 under conditions of 1A/g0.85The constant current charge-discharge curve chart of Se nano material electrode, can be calculated it than capacitance according to curve is 1528F/g；The constant current charge-discharge curve chart that accompanying drawing 7 and accompanying drawing 8 respectively embodiment 2 and embodiment 3 are tested when constant current density is 1A/g, can be calculated by figure, its Co0.85The ratio capacitance of Se nano material electrode is respectively 1223F/g and 1342F/g.
6) testing impedance: the Co that the various embodiments described above are prepared0.85Se nano material is made electrode slice and is assembled into three-electrode system and carries out electrochemical alternate impedance spectrum test, as shown in Figure 9, and the Co prepared for embodiment 10.85The AC impedance spectrogram of Se nano material electrode, illustration is equivalent circuit diagram, from the figure, it can be seen that Co0.85The internal resistance of Se nano material electrode is the least, is 1.4 Ω/cm2, draw Co from the data analysis of AC impedance0.85The Charge-transfer resistance of Se nano material electrode is 0.73 Ω/cm2。
Claims (7)
1. one kind be used as electrode material for super capacitor nano material, it is characterised in that: described nano material be chemical formula be Co0.85The Co of Se0.85Se nano material, described Co0.85Se nano material is the three-dimensional porous nano structure of the space hole that the interlaced formation of nanometer sheet contains connection.
A kind of nano material as electrode material for super capacitor the most according to claim 1, it is characterised in that: described Co0.85Se nano material is by pure Co0.85Se nanometer sheet forms, and nanometer sheet thickness is less than 10nm.
Nano material the most according to claim 1 and 2 is in the application of electrode material for super capacitor, it is characterised in that: described Co0.85Se nano material, in ultracapacitor three-electrode system is tested, reaches 1223～1528F/g than capacitance.
4. the method for the preparation a kind of nano material as electrode material for super capacitor described in claim 1 or 2, it is characterised in that including: by raw material Co (NO3)2·6H2O 、Na2SeO3Being dissolved under deionized water, room temperature stirs is placed in reactor, adds quantitative hydrazine hydrate, immerses the substrate in the solution in reactor afterwards, is then placed in baking oven by this reactor and carries out hydrothermal synthesis reaction, obtains final product Co0.85Se nano material.
A kind of preparation method of the nano material as electrode material for super capacitor, it is characterised in that: reactor carries out the temperature of hydrothermal synthesis reaction in an oven and is 120-160 DEG C, and the response time is 24 hours.
A kind of preparation method of the nano material as electrode material for super capacitor, it is characterised in that: raw material Co (NO3)2·6H2O 、Na2SeO3Mol ratio be 1: 1, the amount of hydrazine hydrate is 6-10ml, and the amount of deionized water is 72ml.
A kind of preparation method of the nano material as electrode material for super capacitor, it is characterised in that: described substrate is nickel foam.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107473190A (en) * | 2017-10-12 | 2017-12-15 | 北京科技大学 | A kind of hollow Co0.85The preparation method of Se nanometer polyhedral particles |
| CN108622929A (en) * | 2018-05-17 | 2018-10-09 | 南京工程学院 | A kind of thiostannate indium electrode material and preparation method thereof |
| CN108933257A (en) * | 2018-08-31 | 2018-12-04 | 浙江大学 | Cu as lithium ion battery electrode material2-xSe nano material and preparation method thereof |
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Cited By (7)
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| CN107473190A (en) * | 2017-10-12 | 2017-12-15 | 北京科技大学 | A kind of hollow Co0.85The preparation method of Se nanometer polyhedral particles |
| CN108622929A (en) * | 2018-05-17 | 2018-10-09 | 南京工程学院 | A kind of thiostannate indium electrode material and preparation method thereof |
| CN109036863A (en) * | 2018-07-23 | 2018-12-18 | 浙江大学 | A kind of selenides@carbon based fibers electrode material for super capacitor and preparation method thereof |
| CN109036863B (en) * | 2018-07-23 | 2020-09-15 | 浙江大学 | Selenide @ carbon-based fiber supercapacitor electrode material and preparation method thereof |
| CN108933257A (en) * | 2018-08-31 | 2018-12-04 | 浙江大学 | Cu as lithium ion battery electrode material2-xSe nano material and preparation method thereof |
| CN110828192A (en) * | 2019-11-14 | 2020-02-21 | 南京理工大学 | Self-supporting high-rate performance electrode based on foamed nickel and preparation method thereof |
| CN110828192B (en) * | 2019-11-14 | 2022-03-18 | 南京理工大学 | Self-supporting high-rate performance electrode based on foamed nickel and preparation method thereof |
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