CN109755025A - A kind of electrode for capacitors, preparation method and capacitor - Google Patents
A kind of electrode for capacitors, preparation method and capacitor Download PDFInfo
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- CN109755025A CN109755025A CN201910032210.1A CN201910032210A CN109755025A CN 109755025 A CN109755025 A CN 109755025A CN 201910032210 A CN201910032210 A CN 201910032210A CN 109755025 A CN109755025 A CN 109755025A
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Abstract
The embodiment of the present invention provides a kind of electrode for capacitors, preparation method and capacitor, and the electrode for capacitors includes: at least two layers of two-dimensional material lamella and at least one layer of carbon nanotube, wherein has one layer of carbon nanotube between two layers of two-dimensional material lamella.Using the embodiment of the present invention working frequency range can be improved under the premise of guaranteeing capacitance density.
Description
Technical field
The present embodiments relate to micro Process and electrochemical technology field more particularly to a kind of electrode for capacitors, preparation side
Method and capacitor.
Background technique
With the rapid development of wearable device and Internet of Things, have at present for the miniaturization of electronic equipment with flexibility
More and more harsh requirement.For the circuit in electronic equipment, although with Moore's Law within the past few decades not
Disconnected verifying, the active crystal pipe volume for being used for logic calculation reduces rapidly, however other passive electronic member devices among circuit
Part, including resistance, capacitor and inductance etc., but there is no too many diminutions in volume.Among many passive components, electrolysis electricity
Appearance is that the maximum single component of volume is occupied on current circuit board.Its major function is to provide the electricity of hundred microfarads or even millifarad grade
Capacity, to provide the function of frequency screening in the frequency range of hundred hertzs.
Capacitor working frequency range in the prior art is lower, is badly in need of the new solution of one kind at present to guarantee capacitance density
Under the premise of, and improve working frequency range.
Summary of the invention
For the technical problems in the prior art, the embodiment of the present invention provides a kind of electrode for capacitors, preparation method
And capacitor.
In a first aspect, the embodiment of the present invention provides a kind of electrode for capacitors, comprising: at least two layers of two-dimensional material lamella and extremely
Few one layer of carbon nanotube, wherein have one layer of carbon nanotube between every two layers of two-dimensional material lamella.
Second aspect, the embodiment of the present invention provide a kind of preparation method of electrode for capacitors, comprising:
It chooses two-dimensional material to incorporate among 20mlLiF/HCl solution, obtains stable dispersion after acquired solution is handled
Liquid；
0.1mg/mL carbon nano-tube solution is added in the stable dispersion liquid, is uniformly mixed and sonicated 1 hour；
The solution mixed is placed in vacuum filtration equipment and is filtered, is dried at room temperature for obtaining such as claim 1
The electrode for capacitors.
The third aspect, the embodiment of the present invention provide a kind of capacitor, comprising: first electrode, second electrode and a filter membrane, institute
State the thin-film device that first electrode, second electrode and the filter membrane are packaged into a sandwich structure, wherein the first electrode
It is above-mentioned electrode for capacitors with the second electrode.
Electrode for capacitors, preparation method and capacitor provided in an embodiment of the present invention, electrode for capacitors include: at least two layers
Two-dimensional material lamella and at least a carbon nanotube, wherein have one layer of carbon nanometer between every two layers of two-dimensional material lamella
Pipe.Using the embodiment of the present invention working frequency range can be improved under the premise of guaranteeing capacitance density.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is this hair
Bright some embodiments for those of ordinary skill in the art without creative efforts, can be with root
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is the structural schematic diagram of electrode for capacitors provided in an embodiment of the present invention；
Fig. 2 a is the transmission electron microscope photo of single-layer metal alkene material provided in an embodiment of the present invention；
Fig. 2 b is the schematic cross-section of combination electrode provided in an embodiment of the present invention；
Fig. 2 c-2e is the schematic cross-section of different proportion carbon nano-tube combination electrode provided in an embodiment of the present invention；
Fig. 2 f is the comparison of the X-ray diffractogram of the combination electrode of different proportion carbon nanotube provided in an embodiment of the present invention
Figure；
Fig. 3 a be one embodiment of the invention provide be incorporation 0%wt, the compound electric of 0.3%wt and 2%wt carbon nanotube
The impedance spectrum curve of pole；
Fig. 3 b is incorporation 0%wt, 0.3%wt and 2%wt three kinds of electrode phases of carbon nanotube that one embodiment of the invention provides
The relationship of position and frequency；
Fig. 3 c is that three kinds of electrodes of incorporation 0%wt, 0.3%wt and 2%wt carbon nanotube that one embodiment of the invention provides hold
The relationship of amount and frequency；
Fig. 3 d is the frequency performance comparison diagram for the different content of carbon nanotubes electrodes that one embodiment of the invention provides.
Appended drawing reference:
The combination electrode of 1- incorporation 0%wt carbon nanotube；
The combination electrode of 2- incorporation 0.3%wt carbon nanotube；
The combination electrode of 3- incorporation 2%wt carbon nanotube
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
Fig. 1 is the structural schematic diagram of electrode for capacitors provided in an embodiment of the present invention, as shown in Figure 1, the capacitor is electric
Pole includes at least two layers of two-dimensional material lamella and at least a carbon nanotube, wherein is had between every two layers of two-dimensional material lamella
One layer of carbon nanotube.
Since the frequency response of supercapacitor is limited to the diffusion velocity of ion, and ion spread in the liquid phase compared to
High two orders of magnitude of solid-state diffusion speed, all atoms of two-dimensional material all on surface, using the electrode of two-dimensional material be not present from
Sub- solid-state diffusion, so the also problem slow there is no reaction rate.Therefore, the embodiment of the present invention, which provides, utilizes the conductive counterfeit electricity of two dimension
Capacity materials provide the technical solution of bulky capacitor in high frequency.
The embodiment of the present invention provides a kind of electrode for capacitors, including at least two layers of two-dimensional material lamella and an at least carbon nanometer
Pipe, wherein have one layer of carbon nanotube between every two layers of two-dimensional material lamella.
For example, it may be there is one layer of carbon nanotube between two layers of two-dimensional material lamella, it is also possible to three layers of two-dimensional material piece
There is two layers of carbon nanotube between layer, and is to have one layer of described carbon nanotube, etc. between the every two layers two-dimensional material lamella.
It can be according to practical situation designed, designed, as shown in Fig. 2 a, Fig. 2 b.
Using the intercalation configuration of electrode provided in an embodiment of the present invention, and interlamellar spacing (effective aperture) and carbon nanotube contain
Amount is positively correlated.Factually test tries, and the electrode being prepared still is able to maintain 6mF/cm at 120Hz2Capacitance density.
Electrode for capacitors provided in an embodiment of the present invention, electrode for capacitors include: at least two layers of two-dimensional material lamella and extremely
A few carbon nanotube, wherein have one layer of carbon nanotube between every two layers of two-dimensional material lamella.Implemented using the present invention
Example can improve working frequency range under the premise of guaranteeing capacitance density.
Preferably, the two-dimensional material is Ti3C2Tx。
On the basis of the above embodiments, it in numerous two-dimensional materials, preferentially has chosen in transition metal carbide race
Ti3C2Tx.On the one hand, Ti3C2TxWith the electric conductivity more than redox graphene, while also showing more than 900F/m3's
Specific capacitance；On the other hand, Ti3C2TxWith relatively good stability, cycle characteristics and wellability.
The embodiment of the present invention also provides a kind of preparation method of electrode for capacitors, comprising:
It chooses two-dimensional material to incorporate among 20mlLiF/HCl solution, obtains stable dispersion after acquired solution is handled
Liquid；
0.1mg/mL carbon nano-tube solution is added in the stable dispersion liquid, is uniformly mixed and sonicated 1 hour；
The solution mixed is placed in vacuum filtration equipment and is filtered, is dried at room temperature for obtaining electricity described above
Container electrode.
On the basis of the above embodiments, specifically, the embodiment of the present invention is illustrated with following example:
(1) 1g ceramic phase material Ti is chosen3C2TxAs presoma, slowly it is put among 20mL LiF/HCl solution (by 1g
LiF powder and 20mL 9M HCl are configured), it is subsequently placed in 35 degree of environment lower 24 hours；
(2) resulting solution is centrifuged 5 minutes under 4500 revolving speeds, removes supernatant, adds deionized water, in repetition
It states centrifuging process 5 times；
(3) solution of acquisition deionized water is diluted 50 times, it is then steady to obtain using cell disruptor ultrasound 2 hours
Determine dispersion liquid；
(4) carbon nano-tube solution of 0.1mg/mL is added, is uniformly mixed and sonicated 1 hour；
(5) solution mixed is placed in vacuum filtration equipment and is filtered, it can also be either general directly on conductive filter membrane
Then logical filter membrane is then transferred to conductive substrates, be then dried at room temperature for, obtain electrode for capacitors.
Fig. 2 c-2e is the schematic cross-section of different proportion carbon nano-tube combination electrode provided in an embodiment of the present invention, can be bright
The aobvious increase found out with content of carbon nanotubes, equivalent pitch of holes obviously increases, so that ion is quickly spread, so that work
Frequency range is got higher.
Fig. 2 f is the comparison of the X-ray diffractogram of the combination electrode of different proportion carbon nanotube provided in an embodiment of the present invention
Figure, can be seen that after increasing content of carbon nanotubes, (001) diffraction maximum moves to left by Fig. 2 f, is the increased effective card of interlamellar spacing
According to.
Pass through Fig. 3 a- Fig. 3 d, it is known that, the mass percent of content of carbon nanotubes is higher, and the working frequency range of electrode is higher, electricity
The capacity of pole is lower, by phase angle whether close to 90 ° of judgement, it is known that whether work in working frequency range.
The preparation method of electrode for capacitors provided in an embodiment of the present invention utilizes the capacitor electricity of preparation of the embodiment of the present invention
Pole can improve working frequency range under the premise of guaranteeing capacitance density.
The embodiment of the present invention also provides a kind of capacitor, comprising: first electrode, second electrode and a filter membrane, described first
Electrode, second electrode and the filter membrane are packaged into the thin-film device of a sandwich structure, wherein the first electrode and described
Second electrode is electrode for capacitors described above.
Capacitor provided in an embodiment of the present invention includes: first electrode, second electrode and a filter membrane, the first electrode,
Second electrode and the filter membrane are packaged into the thin-film device of a sandwich structure, wherein the first electrode and described second
Electrode is electrode for capacitors described above.Using the embodiment of the present invention work can be improved under the premise of guaranteeing capacitance density
Frequency range.
The apparatus embodiments described above are merely exemplary, wherein described, unit can as illustrated by the separation member
It is physically separated with being or may not be, component shown as a unit may or may not be physics list
Member, it can it is in one place, or may be distributed over multiple network units.It can be selected according to the actual needs
In some or all of the modules achieve the purpose of the solution of this embodiment.Those of ordinary skill in the art are not paying creativeness
Labour in the case where, it can understand and implement.
Through the above description of the embodiments, those skilled in the art can be understood that each embodiment can
It realizes by means of software and necessary general hardware platform, naturally it is also possible to pass through hardware.Based on this understanding, on
Stating technical solution, substantially the part that contributes to existing technology can be embodied in the form of software products in other words, should
Computer software product may be stored in a computer readable storage medium, such as ROM/RAM, magnetic disk, CD, including several fingers
It enables and using so that a computer equipment (can be personal computer, server or the network equipment etc.) executes each implementation
Method described in certain parts of example or embodiment.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；
And these are modified or replaceed, technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution spirit and
Range.
Claims (4)
1. a kind of electrode for capacitors characterized by comprising at least two layers of two-dimensional material lamella and at least one layer of carbon nanotube,
Wherein, there is one layer of carbon nanotube between the every two layers two-dimensional material lamella.
2. electrode for capacitors according to claim 1, which is characterized in that the two-dimensional material is Ti3C2Tx。
3. a kind of preparation method of electrode for capacitors characterized by comprising
It chooses two-dimensional material to incorporate among 20mlLiF/HCl solution, obtains stable dispersions after acquired solution is handled；
0.1mg/mL carbon nano-tube solution is added in the stable dispersion liquid, is uniformly mixed and sonicated 1 hour；
The solution mixed is placed in vacuum filtration equipment and is filtered, is dried at room temperature for obtaining as described in claim 1
Electrode for capacitors.
4. a kind of capacitor characterized by comprising first electrode, second electrode and a filter membrane, the first electrode, second
Electrode and the filter membrane are packaged into the thin-film device of a sandwich structure, wherein the first electrode and the second electrode
For electrode for capacitors as described in claim 1.
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Cited By (4)
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| CN110438799A (en) * | 2019-08-19 | 2019-11-12 | 北京化工大学 | Textile material and preparation method thereof |
| CN112795209A (en) * | 2019-11-14 | 2021-05-14 | 清华大学 | Two-dimensional titanium carbide film with stable environment and excellent conductivity and mechanical property, and preparation method and application thereof |
| CN113764198A (en) * | 2021-08-19 | 2021-12-07 | 西安交通大学 | Reduced graphene oxide/MXene porous flexible membrane electrode and preparation method and application thereof |
| CN115000410A (en) * | 2022-07-07 | 2022-09-02 | 桂林理工大学 | Carbon nano tube-titanium carbide composite porous microsphere, preparation thereof and application thereof in lithium-sulfur battery |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110438799A (en) * | 2019-08-19 | 2019-11-12 | 北京化工大学 | Textile material and preparation method thereof |
| CN112795209A (en) * | 2019-11-14 | 2021-05-14 | 清华大学 | Two-dimensional titanium carbide film with stable environment and excellent conductivity and mechanical property, and preparation method and application thereof |
| CN112795209B (en) * | 2019-11-14 | 2021-11-30 | 清华大学 | Two-dimensional titanium carbide film with stable environment and excellent conductivity and mechanical property, and preparation method and application thereof |
| CN113764198A (en) * | 2021-08-19 | 2021-12-07 | 西安交通大学 | Reduced graphene oxide/MXene porous flexible membrane electrode and preparation method and application thereof |
| CN113764198B (en) * | 2021-08-19 | 2022-08-09 | 西安交通大学 | Reduced graphene oxide/MXene porous flexible membrane electrode and preparation method and application thereof |
| CN115000410A (en) * | 2022-07-07 | 2022-09-02 | 桂林理工大学 | Carbon nano tube-titanium carbide composite porous microsphere, preparation thereof and application thereof in lithium-sulfur battery |
| CN115000410B (en) * | 2022-07-07 | 2023-12-26 | 桂林理工大学 | Positive electrode material of lithium-sulfur battery |
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