KR101961005B1 - Electrode yarn, method of fabricating of the same, and super capacitor comprising of the same - Google Patents
Electrode yarn, method of fabricating of the same, and super capacitor comprising of the same Download PDFInfo
- Publication number
- KR101961005B1 KR101961005B1 KR1020160129202A KR20160129202A KR101961005B1 KR 101961005 B1 KR101961005 B1 KR 101961005B1 KR 1020160129202 A KR1020160129202 A KR 1020160129202A KR 20160129202 A KR20160129202 A KR 20160129202A KR 101961005 B1 KR101961005 B1 KR 101961005B1
- Authority
- KR
- South Korea
- Prior art keywords
- carbon nanotube
- fiber
- nanotube sheet
- energy storage
- base
- Prior art date
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-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
- H01G11/36—Nanostructures, e.g. nanofibres, nanotubes or fullerenes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-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
- H01G11/40—Fibres
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-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
Abstract
A method for producing an electrode fiber is provided. The method includes the steps of preparing a carbon nanotube sheet, providing energy storage particles on the carbon nanotube sheet, twisting the carbon nanotube sheet provided with the energy storage particles, The method includes the steps of: preparing a plurality of base yarns extending in a first direction; and twisting the plurality of base fibers together to produce a composite fiber.
Description
More particularly, the present invention relates to an electrode fiber including a carbon nanotube sheet and energy storage particles, a method of manufacturing the electrode fiber, and a super capacitor including the electrode fiber. .
A super capacitor is a capacitor having a large capacitance, and is called an ultra capacitor or an ultra high capacity capacitor. Unlike a battery using a chemical reaction, a supercapacitor uses a charge phenomenon due to ion movement or surface chemical reaction between an electrode and an electrolyte interface. As a result, it is rapidly emerging as a next-generation energy storage device that can be used as an auxiliary battery or a battery replacement due to its rapid charge / discharge, high charge / discharge efficiency, and semi-permanent cycle life characteristics.
Such super capacitors are used as energy buffers in the next generation of environmentally friendly vehicles such as Electric Vehicle (EV), Hybrid Electric Vehicle (HEV) or Fuel Cell Vehicle (FCV) .
BACKGROUND ART [0002] There is a great deal of research and development on an electrode for a supercapacitor that greatly affects the characteristics of a supercapacitor in accordance with the demands of the industry for a supercapacitor. For example, in Korean Patent Laid-Open Publication No. 10-2012-0016343 (Application No. 10-2010-0078611), an electrode is formed by a screen printing method in order to reduce the thickness while maintaining the capacity of a supercapacitor, Is disclosed.
Disclosure of Invention Technical Problem [8] Accordingly, the present invention has been made in view of the above problems, and an object thereof is to provide an electrode fiber having a simplified manufacturing process, a manufacturing method thereof, and a supercapacitor including the same.
Another object of the present invention is to provide an electrode fiber with reduced manufacturing cost, a method of manufacturing the electrode fiber, and a supercapacitor including the electrode fiber.
Another object of the present invention is to provide an electrode fiber having improved energy storage characteristics, a method of manufacturing the electrode fiber, and a supercapacitor including the electrode fiber.
Another object of the present invention is to provide a highly elastic electrode fiber, a method of manufacturing the electrode fiber, and a supercapacitor including the electrode fiber.
Another object of the present invention is to provide a highly reliable electrode fiber, a manufacturing method thereof, and a supercapacitor including the electrode fiber.
Another object of the present invention is to provide an electrode fiber which is easily applicable to a wearable device, a manufacturing method thereof, and a supercapacitor including the electrode fiber.
The technical problem to be solved by the present invention is not limited to the above.
In order to solve the above technical problems, the present invention provides a method of manufacturing an electrode fiber.
According to another embodiment of the present invention, there is provided a method of manufacturing an electrode fiber, comprising: preparing a carbon nanotube sheet; providing energy storage particles on the carbon nanotube sheet; Twisting the carbon nanotube sheet to produce a base yarn extending in a first direction, and twisting the plurality of base fibers to each other to produce a composite fiber .
According to an exemplary embodiment, the step of providing the energy storage particles on the carbon nanotube sheet may include controlling the content of the energy storage particles in the base fiber to be equal to or less than a reference content.
According to one embodiment, the reference content may be 70 wt%.
According to an embodiment, the carbon nanotube sheet may include a plurality of carbon nanotubes extending in the first direction.
According to an embodiment, the step of fabricating the base fiber may include twisting one ends of the plurality of carbon nanotubes extending in the first direction using the first direction as a rotation axis.
According to one embodiment, the energy storage particles comprise metal oxide particles, wherein the step of providing the energy storage particles comprises: dispersing the metal oxide particles in a solvent to produce a source solution, On the carbon nanotube sheet.
According to one embodiment, the base fiber can be produced by twisting the carbon nanotube sheet directly after the source solution is provided on the carbon nanotube sheet.
In order to solve the above technical problem, the present invention provides an electrode fiber.
According to one embodiment, the electrode fiber comprises a carbon nanotube sheet and a base fiber comprising energy storage particles, wherein an interior region of the base fiber is rolled to form a stacked carbon nanotube sheet. ), And the energy storage particles may be provided between the dried and stacked carbon nanotube sheets.
According to one embodiment, in the cross-section of the base fiber cut into a first plane extending in a first direction and having a normal to the first direction, the cross-section of the carbon nanotube sheet is spiral- . ≪ / RTI >
According to one embodiment, the energy storage particles may be provided between the spiral carbon nanotube sheets in a cross section of the base fiber cut into a first plane having a normal to the first direction.
According to one embodiment, the electrode fibers may be provided with a plurality of base fibers, and the plurality of base fibers may include conjugated fibers twisted with each other.
According to one embodiment, the conjugated fiber may have elasticity.
According to one embodiment, in the base fiber, the content of the energy storage particles may be higher than the content of the carbon nanotube sheet.
According to an aspect of the present invention, there is provided a supercapacitor.
According to one embodiment, the supercapacitor may include a base fiber according to the above-described embodiment.
A method of manufacturing an electrode fiber according to an embodiment of the present invention includes the steps of: providing energy storage particles on a carbon nanotube sheet; and twisting the carbon nanotube sheet provided with the energy storage particles, Base fiber. ≪ / RTI > Accordingly, the electrode fiber in which the content of the energy storage particles in the base fiber can be maximized, thereby simplifying the manufacturing process and reducing the manufacturing cost can be provided.
1 is a flowchart illustrating a method of manufacturing an electrode fiber according to an embodiment of the present invention.
FIGS. 2 to 4 are views for explaining a manufacturing process of an electrode fiber according to an embodiment of the present invention.
FIG. 5 is a photograph of base fibers, composite fibers, and electrode fabrics manufactured according to the method of manufacturing the electrode fibers according to the embodiments of the present invention.
FIGS. 6A and 6B are graphs comparing the cyclic voltage and charge and discharge characteristics of the supercapacitors according to Examples 4 to 6 and Comparative Example 1 of the present invention. FIG.
FIG. 7 is a graph comparing capacitive characteristics of the supercapacitors according to Examples 4 to 6 and Comparative Example 1 of the present invention.
8 is a graph showing characteristics of an asymmetric supercapacitor according to an eighth embodiment of the present invention.
9 is a graph showing characteristics of a supercapacitor according to a sixth embodiment of the present invention.
10 is a graph showing characteristics of a supercapacitor according to a seventh embodiment of the present invention.
11 is a graph showing energy densities of supercapacitors according to embodiments of the present invention.
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the technical spirit of the present invention is not limited to the embodiments described herein but may be embodied in other forms. Rather, the embodiments disclosed herein are provided so that the disclosure can be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
In this specification, when an element is referred to as being on another element, it may be directly formed on another element, or a third element may be interposed therebetween. Further, in the drawings, the thicknesses of the films and regions are exaggerated for an effective explanation of the technical content.
Also, while the terms first, second, third, etc. in the various embodiments of the present disclosure are used to describe various components, these components should not be limited by these terms. These terms have only been used to distinguish one component from another. Thus, what is referred to as a first component in any one embodiment may be referred to as a second component in another embodiment. Each embodiment described and exemplified herein also includes its complementary embodiment. Also, in this specification, 'and / or' are used to include at least one of the front and rear components.
The singular forms "a", "an", and "the" include plural referents unless the context clearly dictates otherwise. It is also to be understood that the terms such as " comprises "or" having "are intended to specify the presence of stated features, integers, Should not be understood to exclude the presence or addition of one or more other elements, elements, or combinations thereof. Also, in this specification, the term "connection " is used to include both indirectly connecting and directly connecting a plurality of components.
In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.
FIG. 1 is a flow chart for explaining a method of manufacturing an electrode fiber according to an embodiment of the present invention, and FIGS. 2 to 4 are views for explaining a manufacturing process of an electrode fiber according to an embodiment of the present invention.
Referring to FIGS. 1 and 2, a
According to one embodiment, the
According to one embodiment, the
The step of providing the
According to one embodiment, the sizes of the
Referring to FIGS. 1 and 3, the
Accordingly, the inner region of the
According to one embodiment, in the
According to one embodiment, as described above, when the
Unlike the embodiment of the present invention described above, the
However, as described above, according to the embodiment of the present invention, the
Also, as described above, before the fiber is manufactured using the
When the
However, as described above, according to the embodiment of the present invention, the source solution containing the
Referring to FIGS. 1 and 4, a plurality of the
The plurality of
According to an exemplary embodiment, the step of providing the
If the energy storage particle (! 20) in the base fiber (130) exceeds the reference content, the plurality of base fibers (130) are twisted to form the composite fiber (140) The
However, as described above, according to the embodiment of the present invention, the content of the
The plurality of
Hereinafter, specific experimental examples and characteristic evaluation results of the electrode fiber manufacturing method according to the embodiment of the present invention will be described.
Production of base fiber according to Example 1
A silicon substrate is prepared. A carbon nanotube forest (CNT forest) having a height of about 400 mu m, a diameter of about 12 nm, and about nine walls was prepared on the silicon substrate by chemical vapor deposition. A carbon nanotube sheet (CNT sheet) having a plurality of carbon nanotubes extending in the first direction was drawn on a glass substrate by pulling the carbon nanotube forest in a first direction.
Manganese dioxide (MnO2) nanoparticles prepared from Sigma-Aldrich, Inc., having a diameter of 30 nm, a length of 100 nm, and a rod shape are prepared. An ethanol solvent containing a concentration of 1-5 mg / ml is prepared. The manganese dioxide nanoparticles were dispersed in the ethanol solvent. The ethanol solvent in which the manganese dioxide nanoparticles were dispersed was sonicated at 150 W for 1 hour to prepare a source solution. The source solution was provided on the carbon nanotube sheet by a drop casting method. While the source solution was provided on the carbon nanotube sheet, the content of the manganese dioxide was controlled to be 91.1 wt% based on the total content.
The carbon nanotube sheet provided with the source solution may be prepared by using the first direction as a rotation axis immediately after the source solution is provided on the carbon nanotube sheet, Approximately 2,000 twisted, base yarns were produced.
The composite fiber production according to Example 2
A carbon nanotube sheet and a source solution according to the above-described
Five base fibers were prepared. The base fibers were twisted about 25,000 times per meter to produce composite fibers.
Fabrication of an electrode fabric according to Example 3
The composite fibers according to Example 2 described above were cross-linked to produce an electrode fabric.
Supercapacitor fabrication according to Example 4
Two base fibers according to Example 2 described above were prepared. 3 g of PVA (polyvinyalcohol) having molecular weight of 146,000 to 186,000, 6 g of lithium chloride (LiCl) and 30 ml of DI water were mixed to prepare a mixed solution. The mixed solution was heat-treated at a temperature of 90 ° C to prepare a PVA / LiCl gel electrolyte. The base fibers according to Example 2 were arranged in parallel at a distance of about 100 mu m. A PVA / LiCl gel electrolyte was coated on the base fiber according to Example 2 to prepare a supercapacitor.
Manufacturing of supercapacitor according to Example 5
A carbon nanotube sheet and a source solution according to the above-described
Two base fibers were prepared. Thereafter, a supercapacitor was manufactured by the method according to Example 4 described above.
Supercapacitor fabrication according to example 6
Two base fibers according to Example 1 described above were prepared. Thereafter, a supercapacitor was manufactured by the method according to the fourth embodiment described above.
Supercapacitor fabrication according to Example 7
Two composite fibers according to Example 2 described above were prepared. Thereafter, the electrolyte according to Example 4 described above was prepared. The composite fibers according to Example 2 described above were arranged in parallel at a distance of about 100 mu m. The composite fiber according to Example 2 was coated with the electrolyte according to Example 4 described above to prepare a supercapacitor.
Supercapacitor fabrication according to Example 8
A carbon nanotube sheet according to the above-described
The base fiber and the base fiber according to the above-described Example 1 were each prepared one by one. The base fiber was used as an anode, and the base fiber according to Example 1 described above was used as a cathode. Thereafter, an asymmetric supercapacitor was manufactured by the method according to Example 4 described above.
Production of composite fiber according to Example 9
The base fiber according to the above-described Example 2 was prepared, and the content of the manganese dioxide was controlled to be 80 wt% based on the total content. Thereafter, the conjugated fiber was prepared by the method according to Example 2 described above.
Fabrication of composite fiber according to example 10
The base fiber according to Example 2 was prepared, and the content of the manganese dioxide was controlled to be 93 wt% based on the entire content. Thereafter, the conjugated fiber was prepared by the method according to Example 2 described above.
The production of the supercapacitor according to Comparative Example 1
A carbon nanotube sheet according to the above-described
Two base fibers were prepared. Thereafter, a supercapacitor was manufactured by the method according to Example 4 described above.
Production of composite fiber according to Comparative Example 2
A carbon nanotube sheet according to the above-described
Five of the base fibers were prepared, and then the conjugated fiber was prepared by the method according to Example 2 described above.
Table 1 below shows the structure of the electrode fibers according to Examples 1 to 8 and Comparative Example 1 and the super capacitors including the same.
FIG. 5 is a photograph of base fibers, composite fibers, and electrode fabrics manufactured according to the method of manufacturing the electrode fibers according to the embodiments of the present invention.
5 (a) and 5 (b), SEM (scanning electron microscopy) photographs of the profile and cross section of the base fiber according to Example 1 of the present invention.
As can be seen from FIG. 5 (a), it was confirmed that the base fiber according to Example 1 was in a twisted form. As can be seen from FIG. 5 (b), the cross-section of the base fiber according to Example 1 was confirmed to be spiral. In addition, the cross section shows that the carbon nanotube sheet is rolled and stacked, and that the manganese dioxide is provided between the dried and stacked carbon nanotube sheets.
Referring to FIG. 5 (c), the composite fiber according to the second embodiment of the present invention and the electrode fabric according to the third embodiment of the present invention were photographed and photographed in general.
As can be seen from FIG. 5 (c), it was confirmed that the composite fiber according to Example 2 was twisted. It was also confirmed that the composite fibers had a diameter of about 100 탆 and a twist structure of 100 times per centimeter. In addition, it was confirmed that the electrode fabric according to Example 3 had a strong and flexible characteristic.
6A and 6B are graphs showing mechanical properties of the conjugated fibers according to Example 2, Example 10, and Comparative Example 2 of the present invention.
Referring to FIG. 6A, the stress (MPa) according to the strain (%) of the composite fibers according to Example 2, Example 10, and Comparative Example 2 of the present invention was measured. As can be seen from FIG. 6A, it was confirmed that the composite fibers according to Example 10 and Comparative Example 2 of the present invention received a high stress even in a slight strain and were broken. However, it was confirmed that the composite fiber according to Example 2 of the present invention had a small change in stress even in a wide strain range. Accordingly, the composite fibers according to Example 10 and Comparative Example 2 were cut off during the production of the composite fibers, and were not made of composite fibers.
Referring to FIG. 6B, the stress (MPa) according to the strain (%) was measured when the composite fiber according to Example 2 of the present invention was bent and spun for 1 to 100 times. As can be seen from FIG. 6B, it was confirmed that the composite fiber according to Example 2 of the present invention exhibited a small strain as compared with the case where the composite fiber was repeatedly bent for 100 times. Thus, it can be seen that the composite fiber according to Example 2 of the present invention is excellent in stretchability.
7 is an SEM photograph of the composite fiber according to Example 9 of the present invention.
7 (a), the entire portion of the composite fiber according to the ninth embodiment of the present invention is SEM, and referring to FIG. 7 (b), the portion (x) 7 (c), the portion (y) of FIG. 7 (a) was enlarged and SEM image was taken. As can be seen from FIGS. 7A, 7B and 7C, it can be seen that the composite fiber according to Example 9 of the present invention shows a break in the process of producing the composite fiber. Thus, it can be confirmed that controlling the content of the manganese dioxide to be 70 wt% or less in the step of producing the composite fiber is an efficient method of producing a composite fiber having high stretchability and high reliability.
8 is a graph comparing the cyclic voltage and charge and discharge characteristics of supercapacitors according to Examples 4 to 6 and Comparative Example 1 of the present invention.
8 (a), the current density according to the voltage of the supercapacitor according to the fourth to sixth embodiments and the comparative example 1 of the present invention is measured, and a cyclic voltage-current curve (hereinafter referred to as a CV curve) Respectively.
As can be seen from FIG. 8A, the CV curves of the supercapacitors according to the fourth to sixth embodiments are in a rectangular shape, and the CV curves of the supercapacitor according to the first comparative example are linear. Also, it can be seen that the area of the CV curve increases with the supercapacitor having a high content of manganese dioxide. Accordingly, it can be seen that the cyclic voltage-current characteristics of the supercapacitor according to the embodiment of the present invention are significantly superior to the cyclic voltage-current characteristics of the supercapacitor according to the comparative example. Also, it can be confirmed that the cyclic voltage-current characteristics are improved in the super capacitor including the base fiber having a high content of manganese dioxide.
Referring to FIG. 8 (b), the charge / discharge curves of the supercapacitors according to Examples 4 to 6 and Comparative Example 1 of the present invention were measured with time.
As shown in FIG. 8 (b), the charge / discharge curves of the supercapacitors according to the fourth to sixth embodiments are shown in a triangular shape, and the charge / discharge curves of the supercapacitor according to the first comparative example are linear. Accordingly, it can be seen that the charge / discharge characteristics of the supercapacitor according to the embodiment of the present invention are significantly superior to the charge / discharge characteristics of the supercapacitor according to the comparative example. Also, it can be confirmed that the cyclic voltage-current characteristics are improved in the super capacitor including the base fiber having a high content of manganese dioxide.
9 is a graph comparing capacitive characteristics of the supercapacitors according to the fourth to sixth embodiments and the first comparative example of the present invention.
9A, the areal capacitance of the supercapacitor according to Examples 4 to 6 and Comparative Example 1 according to the manganese dioxide content was measured.
As shown in FIG. 9A, the supercapacitor according to the comparative example 1 has a capacitance of 0.01 F / cm 2 , the supercapacitor according to the fourth embodiment has a capacitance of 0.3 F / cm 2 , the supercapacitor according to the fifth embodiment has a capacitance of 0.42 F / cm 2 , and the supercapacitor according to Example 6 exhibits an areal capacitance of 0.6 F / cm 2 . As a result, it was found that the areal capacitance of the supercapacitor is improved as the manganese dioxide content of the base fiber is increased in the supercapacitor including the base fiber according to the embodiment of the present invention.
Referring to FIG. 9 (b), the linear capacitance and areal capacitance of the supercapacitor according to the sixth embodiment of the present invention are measured according to the scan speed of 10 to 100 mV / s.
As can be seen in 9 (b), areal capacitance of a supercapacitor according to the
10 is a graph showing characteristics of an asymmetric supercapacitor according to an eighth embodiment of the present invention.
Referring to FIG. 10A, the current density according to the voltage of the asymmetric supercapacitor according to the eighth embodiment is measured while varying the working voltage from 1.4V to 2.2V, and the cyclic voltage current (CV) Respectively.
As can be seen from FIG. 10 (a), the asymmetric supercapacitor according to the eighth embodiment has a rectangular CV curve according to the change of the driving voltage. Also, it can be seen that the area of the CV curve increases as the driving voltage increases. Accordingly, it can be seen that the asymmetric supercapacitor according to the eighth embodiment has improved cyclic voltage-current characteristics as the driving voltage increases.
Referring to FIG. 10B, the charge / discharge cycle of the asymmetric supercapacitor according to the eighth embodiment is adjusted from 1 to 1000 times and the capacitance retention characteristic is measured. The current density according to the voltage when the charging / discharging cycle of the asymmetric supercapacitor according to the eighth embodiment was performed once or 1000 times was measured, and the circulating voltage / current curve was shown.
As can be seen from FIG. 10 (b), the asymmetric supercapacitor according to the eighth embodiment can confirm that the change in the capacitance retention is not substantially substantial while the charge-discharge cycle changes from one to 1000 times. It can also be seen that there is substantially no difference between the CV curve area when the charge / discharge cycle is once and the CV curve area when the charge / discharge cycle is 1000 times. Thus, it can be confirmed that the durability and lifetime characteristics of the asymmetric supercapacitor according to the eighth embodiment are excellent.
11 is a graph showing characteristics of a supercapacitor according to a sixth embodiment of the present invention.
11 (a), the MnO 2 / CNT base fiber electrode of the supercapacitor according to the sixth embodiment is placed in a state of being in the original state (Pristine), bending angle bent state (Bent) at 165 °, (V vs. Ag / AgCl) in the range of 0 to 0.8 in the Wound and Knotted states, and the cyclic voltammetric curves are shown.
11 (a), the supercapacitor according to Example 6 has a structure in which the MnO 2 / CNT base fiber electrode is in the original state (Pristine), bent in a bending angle of 165 ° (Bent) It can be seen that there is practically no difference in the CV curve area in the Iound state and the Knotted state.
Referring to FIG. 11 (b), the capacitance retention of the MnO 2 / CNT base fiber electrode of the supercapacitor according to Example 6 was measured by bending at a bending angle of 165 ° from 1 to 1000 times.
As can be seen from FIG. 11 (b), it can be seen that the supercapacitor according to the sixth embodiment has almost no change in storage capacity even when the MnO 2 / CNT base fiber electrode is bent from one to 1,000 times. Thus, it can be confirmed that the MnO 2 / CNT base fiber of the supercapacitor according to Example 6 of the present invention has excellent durability.
12 is a graph showing the characteristics of the supercapacitor according to the seventh embodiment of the present invention.
12 (a), when the MnO 2 / CNT composite fiber electrode of the supercapacitor according to Example 7 is stretched at 0%, 10%, 20%, and 30% length in the first direction, The current density was measured and the cyclic voltage / current curve was shown.
12 (a), when the MnO 2 / CNT composite fiber electrodes were stretched at 0%, 10%, 20%, and 30% length in the first direction, the supercapacitor according to Example 7 had similar CV curve area.
12 (b), when the MnO 2 / CNT composite fiber electrode of the supercapacitor according to Example 7 was stretched in 0%, 10%, 20%, and 30% length in the first direction, the electrochemical impedance Spectroscopy (EIS), and the EIS curve is shown.
12 (b), when the MnO 2 / CNT composite fibers were stretched at 0%, 10%, 20% and 30% length in the first direction, the supercapacitor according to Example 7 exhibited similar EIS It can be confirmed that it represents a curve. Thus, it can be confirmed that the MnO 2 / CNT conjugated fiber of the supercapacitor according to Example 7 of the present invention has excellent stretchability.
13 is a graph showing energy densities of supercapacitors according to embodiments of the present invention.
Referring to FIG. 13, supercapacitors according to Example 6 and Example 7 were maintained at a charge / discharge voltage of 1.2 V, and energy densities corresponding to power densities were measured.
As shown in FIG. 13, the supercapacitor according to Example 6 exhibited an energy density of 33 μWh / cm 2 , and the supercapacitor according to Example 7 exhibited an energy density of 12 μWh / cm 2 . Thus, it can be confirmed that the supercapacitor according to the sixth and seventh embodiments of the present invention exhibits excellent performance.
While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the scope of the present invention is not limited to the disclosed exemplary embodiments. It will also be appreciated that many modifications and variations will be apparent to those skilled in the art without departing from the scope of the present invention.
100: substrate
110: Carbon nanotube sheet
120: energy storage particle
130: Base fiber
140: Composite fiber
150: Electrode fabric
Claims (14)
Providing energy storage particles on the carbon nanotube sheet;
The carbon nanotube sheet provided with the energy storage particles is twisted to produce a plurality of base yarns extending in a first direction; And
And twisting the plurality of base fibers to each other to produce a composite fiber.
The step of providing the energy storage particles on the carbon nanotube sheet comprises:
And controlling the content of the energy storage particles in the base fiber to be not more than a reference content.
Wherein the reference content is 70 wt%.
Wherein the carbon nanotube sheet includes a plurality of carbon nanotubes extending in the first direction.
Wherein the step of fabricating the base fibers comprises:
And twisting the ends of the plurality of carbon nanotubes extending in the first direction using the first direction as a rotation axis.
Wherein the energy storage particles comprise metal oxide particles,
Wherein providing energy storage particles comprises:
Dispersing the metal oxide particles in a solvent to prepare a source solution; And
And providing the source solution on the carbon nanotube sheet.
And twisting the carbon nanotube sheet directly after the source solution is provided on the carbon nanotube sheet to produce the base fiber.
The inner region of the base fiber is provided in a rolled stacked form of the carbon nanotube sheet,
The energy storage particles are provided between the dried and stacked carbon nanotube sheets,
Wherein the content of the energy storage particles in the base fiber is higher than the content of the carbon nanotube sheet.
The base fibers extending in a first direction,
Wherein the cross section of the carbon nanotube sheet is provided spirally in a cross section of the base fiber cut into a first plane having a normal to the first direction.
Wherein the energy storage particles are provided between the spiral carbon nanotube sheets in a cross section of the base fiber cut into a first plane having a normal to the first direction.
The base fibers are provided in plural,
Wherein the plurality of base fibers comprise conjugated fibers twisted together.
Wherein the conjugate fiber has elasticity.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020160129202A KR101961005B1 (en) | 2016-10-06 | 2016-10-06 | Electrode yarn, method of fabricating of the same, and super capacitor comprising of the same |
| PCT/KR2017/011120 WO2018066974A1 (en) | 2016-10-06 | 2017-10-10 | Electrode fiber and method for producing same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020160129202A KR101961005B1 (en) | 2016-10-06 | 2016-10-06 | Electrode yarn, method of fabricating of the same, and super capacitor comprising of the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR20180038287A KR20180038287A (en) | 2018-04-16 |
| KR101961005B1 true KR101961005B1 (en) | 2019-03-21 |
Family
ID=61831833
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1020160129202A KR101961005B1 (en) | 2016-10-06 | 2016-10-06 | Electrode yarn, method of fabricating of the same, and super capacitor comprising of the same |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR101961005B1 (en) |
| WO (1) | WO2018066974A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102079446B1 (en) * | 2017-06-08 | 2020-02-19 | 한양대학교 산학협력단 | Electric energy charging system and Electric energy charging method |
| KR102098690B1 (en) * | 2018-10-02 | 2020-04-08 | 한양대학교 산학협력단 | Wet-spun Electrode Fibers and Supercapacitors There upon |
| KR102270773B1 (en) * | 2020-01-15 | 2021-06-29 | 한국과학기술원 | Method for improving charge-discharge characteristics of mxene and cnt based energy repositors |
| CN111986931B (en) * | 2020-07-24 | 2021-10-26 | 华南理工大学 | Manganese oxide nano-structure electrode material and preparation method and application thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101523665B1 (en) * | 2013-12-17 | 2015-05-28 | 한양대학교 산학협력단 | Flexible Yarned Structure for Supercapacitor |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101126784B1 (en) * | 2009-09-25 | 2012-04-12 | 전남대학교산학협력단 | Method for producing complex of Manganese dioxide and carbon nanofiber and pseudo capacitor including the complex |
| CN102040212B (en) * | 2009-10-23 | 2013-01-09 | 清华大学 | Carbon nano tube composite structure |
| US8780526B2 (en) * | 2010-06-15 | 2014-07-15 | Applied Nanostructured Solutions, Llc | Electrical devices containing carbon nanotube-infused fibers and methods for production thereof |
| KR101148126B1 (en) | 2010-08-16 | 2012-05-23 | 엘지이노텍 주식회사 | Supercapacitor and manufacturing method of the same |
| KR101430396B1 (en) * | 2012-05-23 | 2014-08-19 | 한국과학기술원 | Metal Oxide Nanotubes, Fabrication Method for preparing the same, and Gas sensor comprising the same |
-
2016
- 2016-10-06 KR KR1020160129202A patent/KR101961005B1/en active IP Right Grant
-
2017
- 2017-10-10 WO PCT/KR2017/011120 patent/WO2018066974A1/en active Application Filing
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101523665B1 (en) * | 2013-12-17 | 2015-05-28 | 한양대학교 산학협력단 | Flexible Yarned Structure for Supercapacitor |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2018066974A1 (en) | 2018-04-12 |
| KR20180038287A (en) | 2018-04-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101961005B1 (en) | Electrode yarn, method of fabricating of the same, and super capacitor comprising of the same | |
| KR102227276B1 (en) | Metal-oxide anchored graphene and carbon-nanotube hybrid foam | |
| Wang et al. | Polypyrrole composites with carbon materials for supercapacitors | |
| US9514892B2 (en) | Yarn-type micro-supercapacitor method for fabricating same | |
| KR102508466B1 (en) | Ag-Zn cell and method of fabricating of the same | |
| Huang et al. | Fabrication of vanadium oxide, with different valences of vanadium,-embedded carbon fibers and their electrochemical performance for supercapacitor | |
| KR101523665B1 (en) | Flexible Yarned Structure for Supercapacitor | |
| US20200044259A1 (en) | Paper current collector, method for manufacturing same, and electrochemical device comprising paper current collector | |
| KR20110063634A (en) | Composite electrode material, battery electrode consisting of said material, and lithium battery including such an electrode | |
| US20160104582A1 (en) | Periodic nanostructures for high energy-density and high power-density devices and systems and uses thereof | |
| KR102129314B1 (en) | MXen/Carbon Nanotube Composites and Fiber-typed Asymmetric Supercapacitors Using the Same | |
| KR102411723B1 (en) | Asymmetric super capacitor and method of fabricating of the same | |
| CN110993360A (en) | Preparation method of integrated electrode composite material and flexible supercapacitor | |
| Su et al. | Flexible two-ply yarn supercapacitors based on carbon nanotube/stainless steel core spun yarns decorated with Co3O4 nanoparticles and MnOx composites | |
| KR101438065B1 (en) | Hybrid nano-complex, method for producing the same, and electrode for supercapacitor comprising the same | |
| KR102225081B1 (en) | Hybrid nanofibers, and manufacturing method therefor | |
| US9378900B2 (en) | Solid electrochemical supercapacitor | |
| KR101744122B1 (en) | Manufacturing method of crumpled graphene-carbon nanotube composite, crumpled graphene-carbon nanotube composite manufactured thereby and supercapacitor containing the composite | |
| Cai et al. | Preparation of sulfur-doped graphene fibers and their application in flexible fibriform micro-supercapacitors | |
| Park et al. | Prospective synthesis approaches to emerging materials for supercapacitor | |
| KR102118061B1 (en) | Complex electrolyte membrane for PEMFC, manufacturing method thereof and membrane electrode assembly containing the same | |
| WO2019059719A2 (en) | Negative electrode material for pseudocapacitor and method for manufacturing same | |
| KR102118063B1 (en) | Complex electrolyte membrane for PEMFC, manufacturing method thereof and membrane electrode assembly containing the same | |
| KR101220036B1 (en) | Electrode for electrochemical device, method for fabricating the same and electrochemical device | |
| EP2241658B1 (en) | Fabrication method for porous carbon fibers |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A201 | Request for examination | ||
| E902 | Notification of reason for refusal | ||
| E902 | Notification of reason for refusal | ||
| E701 | Decision to grant or registration of patent right |