KR20130072507A - Method for aging super capacitor - Google Patents
Method for aging super capacitor Download PDFInfo
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- KR20130072507A KR20130072507A KR1020110139962A KR20110139962A KR20130072507A KR 20130072507 A KR20130072507 A KR 20130072507A KR 1020110139962 A KR1020110139962 A KR 1020110139962A KR 20110139962 A KR20110139962 A KR 20110139962A KR 20130072507 A KR20130072507 A KR 20130072507A
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- Prior art keywords
- aging
- voltage
- supercapacitor
- temperature
- super capacitor
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- 238000000034 method Methods 0.000 title claims abstract description 48
- 239000003990 capacitor Substances 0.000 title claims description 49
- 230000002431 foraging effect Effects 0.000 title description 3
- 230000032683 aging Effects 0.000 claims abstract description 114
- 230000009467 reduction Effects 0.000 claims description 4
- 238000005259 measurement Methods 0.000 description 16
- 230000000052 comparative effect Effects 0.000 description 12
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 7
- 229910001416 lithium ion Inorganic materials 0.000 description 7
- 238000006722 reduction reaction Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 229910003460 diamond Inorganic materials 0.000 description 2
- 239000010432 diamond Substances 0.000 description 2
- 239000007772 electrode material Substances 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 229910016978 MnOx Inorganic materials 0.000 description 1
- 229910003307 Ni-Cd Inorganic materials 0.000 description 1
- 229910018095 Ni-MH Inorganic materials 0.000 description 1
- 229910018477 Ni—MH Inorganic materials 0.000 description 1
- 229910019897 RuOx Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 239000003985 ceramic capacitor Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- VRIVJOXICYMTAG-IYEMJOQQSA-L iron(ii) gluconate Chemical compound [Fe+2].OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C([O-])=O.OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C([O-])=O VRIVJOXICYMTAG-IYEMJOQQSA-L 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000007773 negative electrode material Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- RUOJZAUFBMNUDX-UHFFFAOYSA-N propylene carbonate Chemical compound CC1COC(=O)O1 RUOJZAUFBMNUDX-UHFFFAOYSA-N 0.000 description 1
- 150000003242 quaternary ammonium salts Chemical class 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 238000006479 redox reaction Methods 0.000 description 1
- 238000011946 reduction process Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G13/00—Apparatus specially adapted for manufacturing capacitors; Processes specially adapted for manufacturing capacitors not provided for in groups H01G4/00 - H01G11/00
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Electric Double-Layer Capacitors Or The Like (AREA)
Abstract
The present invention relates to a method of aging a supercapacitor, and to ensure the reliability of the supercapacitor according to aging while performing aging in a short time for the manufactured supercapacitor. According to the present invention, while aging for 90 to 150 minutes while applying a supercapacitor of 60 ~ 80 ℃, 2.3 ~ 2.7V, aging method of the supercapacitor for applying a voltage of 2.7V for a predetermined time To provide. At this time, the aging may be performed while applying a constant temperature selected between 60 <temperature (° C) ≤80 ° C and a constant voltage selected between 2.5 <voltage (V) ≤2.7.
Description
The present invention relates to a method of manufacturing a super capacitor, and more particularly, a super capacitor capable of securing the reliability of a super capacitor according to aging while performing aging (aging) in a short time with respect to the manufactured super capacitor. Relates to the aging method.
In addition to various portable electronic devices, there is a demand for electric power storage devices for electric vehicles and electric energy storage devices for systems for controlling or supplying instantaneous overload. Ni-MH A secondary battery such as a Ni-Cd battery, a lead-acid battery, and a lithium secondary battery, and a super capacitor, an aluminum electrolytic capacitor, and a ceramic capacitor having a high output density and close to unlimited charge / discharge life.
In particular, the super capacitor includes an electric double layer capacitor (EDLC), a pseudo capacitor, and a hybrid capacitor such as a lithium ion capacitor (LIC).
Here, the electric double layer capacitor is a capacitor using an electrostatic charge phenomenon occurring in an electric double layer formed at the interface of different phases, and has a faster charging / discharging speed, a higher charge / discharge efficiency than the battery in which the energy storage mechanism depends on the oxidation and reduction process, Is widely used for backup power supply, and the potential as an auxiliary power source for electric vehicles in the future is also unlimited.
A pseudo capacitor is a capacitor that converts and stores a chemical reaction into electrical energy by using an oxidation-reduction reaction of an electrode and an electrochemical oxide reactant. The pseudocapacitor has a storage capacity about 5 times larger than that of the electric double layer capacitor because the electric double layer capacitor can store the electric charge near the surface of the electrode material as compared with the electric double layer capacitor formed on the surface of the electrochemical double layer type electrode. As the metal oxide electrode material, RuOx, IrOx, MnOx and the like are used.
The lithium ion capacitor is a new concept of a secondary battery system that combines the high power and long life characteristics of a conventional electric double layer capacitor with the high energy density of a lithium ion battery. Electric double layer capacitors using the physical adsorption reaction of electric charges in the electric double layer have been limited in their application to various applications due to their low energy density despite excellent power characteristics and lifetime characteristics. As a means for solving the problem of such an electric double layer capacitor, a lithium ion capacitor using a carbon-based material capable of inserting and separating lithium ions as a negative electrode active material has been proposed. The lithium ion capacitor has a structure in which lithium ions, And the cell voltage can realize a high voltage of 3.8 V or more, which is much higher than that of the conventional electric double layer capacitor by 2.5 V, and can exhibit a high energy density.
The basic structure of such a supercapacitor is composed of an electrode, an electrolyte, a current collector, and a separator having a relatively large surface area such as a porous electrode. A voltage of several volts is applied to both ends of the unit cell electrode, And the electrochemical mechanism generated by adsorption on the surface of the electrode moves along the electric field. These cells are sealed to the upper and lower cases made of metal, and the upper and lower terminals are attached to the outer surfaces of the upper and lower cases.
When used immediately after manufacture, such a supercapacitor has a characteristic that the capacity of the supercapacitor decreases rapidly after the capacity drops sharply compared to the initial capacity of the initial use.
Accordingly, it is an object of the present invention to provide a method of aging a supercapacitor after aging the supercapacitor up to the point where a sudden drop in capacity occurs from the initial capacitance after fabricating the external form of the supercapacitor. .
Another object of the present invention is to provide a method of aging a super capacitor capable of securing the reliability of the super capacitor according to aging while performing aging for a manufactured super capacitor in a short time.
In order to achieve the above object, the present invention performs the aging for 90 to 150 minutes while applying a supercapacitor to a voltage of 60 ~ 80 ℃, 2.3 ~ 2.7V, aging while applying a voltage of 2.7V for a certain time An aging method of a super capacitor is provided.
In the aging method according to the present invention, aging may be performed while increasing the voltage in a stepped or curved shape.
In the aging method according to the present invention, aging may be performed while increasing the temperature in a stepped or curved shape.
In the aging method according to the present invention, the time for applying the voltage of 2.7V among the aging time can be the longest.
In the aging method according to the present invention, the aging can be performed while applying a constant temperature selected between 60 <
In the aging method according to the present invention, aging may be performed while increasing the temperature in a stepped or curved shape and applying a constant voltage selected from 2.5 <voltage (V) ≤2.7.
In the aging method according to the present invention, aging may be performed while applying a constant temperature selected between 60 <temperature (° C.) ≦ 80 ° C. and a constant voltage selected between 2.5 <voltage (V) ≦ 2.7.
In the aging method according to the present invention, the capacity reduction rate after a high temperature load for 500 hours compared to the capacity after the aging may be 12% or less.
According to the present invention, after fabricating the external form of the supercapacitor, by aging the supercapacitor up to the point where a sudden drop in capacity occurs from the initial capacitance, a reliable capacity change is made to the user. A super capacitor can be provided.
In addition, by aging the super capacitor for about 2 hours while applying a voltage of 70 ~ 80 ℃, 2.3 ~ 2.7 V, it is possible to ensure the reliability of the super capacitor according to the aging while performing aging in a short time to the manufactured super capacitor.
In particular, aging is performed while applying a constant temperature selected between 60 <temperature (° C) ≤80 ° C and a constant voltage selected between 2.5 <voltage (V) ≤2.7, thereby ensuring aging while ensuring the reliability of the supercapacitor in a short time. Can be done.
1 is a graph showing a method of aging a super capacitor according to a first embodiment of the present invention.
2 is a graph illustrating a method of aging a super capacitor according to a first comparative example of the present invention.
3 and 4 are graphs showing 500-hour reliability test results of the aged supercapacitors according to the first embodiment and the first comparative example.
5 is a graph illustrating a method of aging a super capacitor according to a second comparative example of the present invention.
6 is a graph illustrating a method of aging a super capacitor according to a second embodiment of the present invention.
FIG. 7 is a diamond graph showing measured characteristic values of a supercapacitor aged with the aging method of FIG. 6.
8 is a graph illustrating a method of aging a super capacitor according to a third embodiment of the present invention.
In the following description, only parts necessary for understanding the embodiments of the present invention will be described, and the description of other parts will be omitted so as not to obscure the gist of the present invention.
The terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary meanings and the inventor is not limited to the meaning of the terms in order to describe his invention in the best way. It should be interpreted as meaning and concept consistent with the technical idea of the present invention. Therefore, the embodiments described in the present specification and the configurations shown in the drawings are merely preferred embodiments of the present invention, and are not intended to represent all of the technical ideas of the present invention, so that various equivalents And variations are possible.
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. At this time, the supercapacitor commonly used as a sample in the aging method according to the first to fourth embodiments of the present invention used an electrode mainly made of activated carbon as a main material for the positive electrode and the negative electrode. Cellulose was used as a separator for preventing, and quaternary ammonium salt was dissolved in propylene carbonate solvent as electrolyte. The sample is a super capacitor with a rated voltage of 2.5V.
First Embodiment
1 is a graph showing a method of aging a super capacitor according to a first embodiment of the present invention.
Referring to FIG. 1, the aging according to the first embodiment was performed for 6 hours while the sample was applied at a rated 2.5V at 60 ° C.
The characteristics of the sample aged according to Example 1 were measured, and the measurement items were capacity, resistance value, self discharge, and capacity reduction rate (hereinafter referred to as 'reliability') after 500 hours of high temperature load. After the ten prepared samples were aged according to the first example, the measured values were measured in the measurement items, and then the values obtained by arithmetical average of the measurement values for each measurement item were used as characteristic values of the measurement items. As a result of the measurement, the capacity was 350F, the resistance was 4.5mPa, the self-discharge 2.30V, and the reliability was 7.10%. Here, the high temperature load condition for 500 hours is a condition of exposing the aged sample to a temperature of 70 ° C. for 500 hours while applying a 2.5V voltage, because the sample is rated voltage 2.V. The capacity change of the sample under these high temperature load conditions was measured.
According to the aging method according to the first embodiment, after the external form of the supercapacitor is manufactured, the supercapacitor can be pre-aged up to the point where a sudden capacity drop occurs at the initial capacitance. Of course, the aging method according to the first embodiment has a side in which a large amount of time is required, which is 6 hours for aging.
As described above, since the aging method according to the first embodiment requires a little time, the method for reducing the aging time has been studied. For example, as shown in FIG. 2, in the first comparative example, aging was performed for 2 hours after fixing the applied voltage and the applied temperature as in the first embodiment.
The measurement results of the samples aged according to the first comparative example were as shown in Table 1, with a capacity of 380F, resistance of 3.7 mPa, self discharge 2.25V, and reliability of 16.60%. That is, as can be seen from the capacity of Table 1, the initial characteristics are superior to the first comparative example compared to the first example. However, referring to Table 1, FIG. 3 and FIG. 4, as can be seen from the reliability, it can be seen that the capacity reduction rate is drastically reduced compared to the first embodiment.
As described above, it was confirmed that aging was not performed simply by reducing the time under the temperature and voltage conditions according to the first embodiment.
Second Embodiment
Therefore, a method of reducing the aging time while showing characteristics similar to those of the supercapacitor according to the aging method of the first embodiment was studied.
5 is a graph illustrating a method of aging a super capacitor according to a second comparative example of the present invention.
Referring to FIG. 5, in the second comparative example, in a state in which a rated 2.5V is applied to a sample, first aging is performed at 60 ° C. for 30 minutes, second aging at 70 ° C. for 30 minutes, and Tertiary aging was performed sequentially and intermittently at 80 ° C. for 60 minutes. In the second comparative example, first to third aging were performed while the temperature and voltage were increased.
The aging according to the second comparative example has the advantage of reducing the aging time by one third compared to the first embodiment, but the configuration of the aging apparatus according to the rise and fall of the temperature and voltage is complicated, and also the effect thereof As compared with Example 1, it was confirmed that reliable aging was not performed.
Therefore, in order to solve the problem according to the second comparative example, as shown in Figs. 6 and 7, in the second embodiment, aging of the sample for 2 hours while raising the applied temperature or applied voltage to the stepped or curved shape. Was performed. 6 is a graph showing an aging method of the supercapacitor according to the second embodiment of the present invention. FIG. 7 is a diamond graph illustrating reliability measured for a super capacitor aged by the aging method of FIG. 6.
At this time, the applied voltage (V1, V2, V3) was increased by 0.2V sequentially from 2.1V. The maximum applied voltage may be set in a range capable of maintaining the high voltage characteristic of the supercapacitor. In the second embodiment, the maximum applied voltage is set to 2.7 V as the maximum applied voltage, but is not limited thereto.
The applied temperature (t1, t2, t3) was raised by 10 ℃ based on the existing 60 ℃. Since the decomposition reaction of the electrolyte solution occurs when the application exceeds 80 ℃, the maximum applied temperature was set to 80 ℃. Aging was performed in three steps while raising the application temperature (t1, t2, t3) and the applied voltage (V1, V2, V3) stepwise. In the second embodiment, the primary aging was performed for 30 minutes, the secondary aging for 30 minutes, and the third aging for 1 hour, but the present invention is not limited thereto.
The measurement result about the sample aged by the step type which concerns on 2nd Example is as Table 2 and FIG.
As shown in Table 2 and FIG. 7, looking at the measurement results according to the aging of the second embodiment, it can be seen that similar results to the measurement results according to the aging of the first embodiment are obtained when high voltage and high temperature are applied. In particular, when the applied voltage in the primary aging is 2.3V is applied to a temperature of 80 ℃, when the applied voltage in the primary aging is applied to a temperature of 60 ℃ or more in the case of 2.7V, according to the aging of the first embodiment It can be seen that results similar to the results are obtained.
As described above, through the second embodiment, the supercapacitor is aging for 90 to 150 minutes while applying a voltage of 2.3 to 2.7 V at 60 to 80 ° C., but a voltage of 2.7 V is applied to the super capacitor for a predetermined time. When applied, a result similar to the measurement result according to the aging of the first embodiment can be derived.
In addition, through the aging according to the second embodiment, it can be seen that performing the third aging time relatively longer than the first and second aging time results similar to the measurement result according to the aging of the first embodiment. .
As described above, according to the second embodiment, the aging time can be shortened while securing a result similar to the measurement result according to the aging of the first embodiment.
Third Embodiment
On the other hand, the second embodiment discloses an example in which aging is performed while raising the voltage or temperature in a step type, but is not limited thereto. As shown in FIG. 8 and Table 3, according to the third embodiment, aging may be performed shorter than the aging time according to the first embodiment while applying a constant voltage and a constant temperature. 8 is a graph illustrating an aging method of the supercapacitor according to the third embodiment of the present invention.
Aging according to the third embodiment is performed while applying a constant voltage and a constant temperature, but at a higher voltage and higher temperature than the aging voltage and temperature according to the first embodiment. For example, when aging is performed while applying a constant temperature selected between 60 <temperature (° C) ≤80 ° C and a constant voltage selected between 2.5 <voltage (V) ≤2.7, the measurement result according to the aging of the first embodiment is very different. Similar results can be seen. In particular, it can be seen that the result most similar to the measurement result according to the aging of the first embodiment is derived near the applied voltage of 2.7V and the applied temperature of 70 ° C. Of course, aging starts at room temperature and 1V and rises to the selected applied temperature and applied voltage, then maintains the selected applied temperature and applied voltage constant, and the aging time at room temperature and applied voltage at the selected applied temperature and applied voltage Lower to 1V.
As described above, according to the third embodiment, the aging time can be shortened while securing a result similar to the measurement result according to the aging of the first embodiment.
On the other hand, the embodiments disclosed in the specification and drawings are merely presented specific examples to aid understanding, and are not intended to limit the scope of the present invention. It will be apparent to those skilled in the art that other modifications based on the technical idea of the present invention are possible in addition to the embodiments disclosed herein.
Claims (8)
An aging method for a super capacitor, characterized in that aging is performed while increasing the voltage in a stepped or curved form.
An aging method for a super capacitor, characterized in that aging is performed while increasing the temperature in a stepped or curved form.
The aging method of the super capacitor, characterized in that the longest time to apply the voltage of 2.7V of the aging time.
An aging method for a super capacitor, characterized in that aging is performed while applying a constant temperature selected between 60 <
An aging method of a supercapacitor, wherein the temperature is increased in a stepped or curved shape and aging is performed while applying a constant voltage selected from 2.5 <voltage (V) ≤2.7.
An aging method for a supercapacitor, characterized in that aging is performed while applying a constant temperature selected between 60 <temperature (° C) ≤80 ° C and a constant voltage selected between 2.5 <voltage (V) ≤2.7.
Aging method of the supercapacitor, characterized in that the capacity reduction rate after a high temperature load for 500 hours compared to the capacity after the aging is 12% or less.
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|---|---|---|---|
| KR1020110139962A KR20130072507A (en) | 2011-12-22 | 2011-12-22 | Method for aging super capacitor |
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| KR1020110139962A KR20130072507A (en) | 2011-12-22 | 2011-12-22 | Method for aging super capacitor |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103346015A (en) * | 2013-07-11 | 2013-10-09 | 南通天禾机械科技有限公司 | Full-automatic burn-in machine segmented stepping boosting burn-in technology |
| DE102014108739A1 (en) | 2013-06-24 | 2014-12-24 | Samsung Electronics Co., Ltd. | Layout design process for double structuring |
| CN104624525A (en) * | 2015-02-04 | 2015-05-20 | 南京绿索电子科技有限公司 | Super-capacitor aging and automatic testing and sorting technological pipelining control system |
| CN104882279A (en) * | 2015-05-28 | 2015-09-02 | 南通华裕电子有限公司 | High specific volume aluminium electrolytic capacitor aging method |
| CN111681876A (en) * | 2020-06-17 | 2020-09-18 | 肇庆绿宝石电子科技股份有限公司 | Ultrahigh-voltage aluminum electrolytic capacitor and manufacturing method thereof |
| KR20220114240A (en) * | 2021-02-08 | 2022-08-17 | 경상국립대학교산학협력단 | Flexible fibrous super capacitor and manufacturing method thereof |
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2011
- 2011-12-22 KR KR1020110139962A patent/KR20130072507A/en active Search and Examination
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102014108739A1 (en) | 2013-06-24 | 2014-12-24 | Samsung Electronics Co., Ltd. | Layout design process for double structuring |
| CN103346015A (en) * | 2013-07-11 | 2013-10-09 | 南通天禾机械科技有限公司 | Full-automatic burn-in machine segmented stepping boosting burn-in technology |
| CN104624525A (en) * | 2015-02-04 | 2015-05-20 | 南京绿索电子科技有限公司 | Super-capacitor aging and automatic testing and sorting technological pipelining control system |
| CN104624525B (en) * | 2015-02-04 | 2016-10-05 | 南京绿索电子科技有限公司 | The process flow control system of the seasoned and automatic testing, sorting of super capacitor |
| CN104882279A (en) * | 2015-05-28 | 2015-09-02 | 南通华裕电子有限公司 | High specific volume aluminium electrolytic capacitor aging method |
| CN111681876A (en) * | 2020-06-17 | 2020-09-18 | 肇庆绿宝石电子科技股份有限公司 | Ultrahigh-voltage aluminum electrolytic capacitor and manufacturing method thereof |
| KR20220114240A (en) * | 2021-02-08 | 2022-08-17 | 경상국립대학교산학협력단 | Flexible fibrous super capacitor and manufacturing method thereof |
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