KR100249950B1 - Electric double-layer capacitor - Google Patents
Electric double-layer capacitor Download PDFInfo
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- KR100249950B1 KR100249950B1 KR1019970009720A KR19970009720A KR100249950B1 KR 100249950 B1 KR100249950 B1 KR 100249950B1 KR 1019970009720 A KR1019970009720 A KR 1019970009720A KR 19970009720 A KR19970009720 A KR 19970009720A KR 100249950 B1 KR100249950 B1 KR 100249950B1
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- 239000003990 capacitor Substances 0.000 title description 3
- 238000003860 storage Methods 0.000 claims abstract description 17
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229910052709 silver Inorganic materials 0.000 claims abstract description 16
- 239000004332 silver Substances 0.000 claims abstract description 16
- 239000010409 thin film Substances 0.000 claims abstract description 13
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims abstract description 12
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910052802 copper Inorganic materials 0.000 claims abstract description 5
- 239000010949 copper Substances 0.000 claims abstract description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 32
- 239000008151 electrolyte solution Substances 0.000 claims description 10
- WMFOQBRAJBCJND-UHFFFAOYSA-M Lithium hydroxide Chemical compound [Li+].[OH-] WMFOQBRAJBCJND-UHFFFAOYSA-M 0.000 claims description 9
- SCVFZCLFOSHCOH-UHFFFAOYSA-M potassium acetate Chemical compound [K+].CC([O-])=O SCVFZCLFOSHCOH-UHFFFAOYSA-M 0.000 claims description 6
- 229910052799 carbon Inorganic materials 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 4
- 235000011056 potassium acetate Nutrition 0.000 claims description 3
- 239000000243 solution Substances 0.000 claims description 3
- 238000005260 corrosion Methods 0.000 claims description 2
- 230000007797 corrosion Effects 0.000 claims description 2
- 239000004744 fabric Substances 0.000 claims description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical class C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 2
- 238000000034 method Methods 0.000 claims 2
- 239000003792 electrolyte Substances 0.000 abstract description 14
- 239000000126 substance Substances 0.000 abstract description 4
- 238000007599 discharging Methods 0.000 abstract description 3
- 230000006866 deterioration Effects 0.000 abstract 1
- 230000001939 inductive effect Effects 0.000 abstract 1
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 8
- 150000002500 ions Chemical class 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000009977 dual effect Effects 0.000 description 4
- 239000005486 organic electrolyte Substances 0.000 description 4
- 229920001940 conductive polymer Polymers 0.000 description 3
- 150000002739 metals Chemical class 0.000 description 3
- 239000007864 aqueous solution Substances 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- XAEFZNCEHLXOMS-UHFFFAOYSA-M potassium benzoate Chemical compound [K+].[O-]C(=O)C1=CC=CC=C1 XAEFZNCEHLXOMS-UHFFFAOYSA-M 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- -1 for example Chemical compound 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910003002 lithium salt Inorganic materials 0.000 description 1
- 159000000002 lithium salts Chemical class 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 150000003242 quaternary ammonium salts Chemical class 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/22—Electrodes
- H01G11/30—Electrodes characterised by their material
- H01G11/32—Carbon-based
-
- 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
- H01G11/26—Electrodes characterised by their structure, e.g. multi-layered, porosity or surface features
- H01G11/28—Electrodes characterised by their structure, e.g. multi-layered, porosity or surface features arranged or disposed on a current collector; Layers or phases between electrodes and current collectors, e.g. adhesives
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/54—Electrolytes
- H01G11/58—Liquid electrolytes
- H01G11/60—Liquid electrolytes characterised by the solvent
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/66—Current collectors
- H01G11/68—Current collectors characterised by their material
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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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- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
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Abstract
본 발명은 충방전 전류와 충전 용량이 큰 전기 이중층 축전지에 관한 것이다.The present invention relates to an electric double layer storage battery having a large charge / discharge current and a high charge capacity.
구성상, 집전체를 은박막이나 구리박막에다 은을 도금한 박막으로 하고, 은으로된 집전체를 침식하지 않는 수산화칼륨 용액을 전해질로 사용한다.In the configuration, the current collector is a thin film of silver plated on a silver thin film or a copper thin film, and a potassium hydroxide solution which does not erode the current collector made of silver is used as an electrolyte.
따라서, 본 발명의 전기 이중층 축전지는 일반 화학 축전지와 달리 전극과 전해액의 화학변화를 유도하지 않고 전하를 충전하므로써, 충방전의 반복에 의한 전극이나 전해액의 열화가 없어서 수명이 길고, 충전시간이 짧고, 유해물질을 갖지 않으며, 충방전 전류와 충전 용량이 큰 효과가 있다.Therefore, the electric double layer battery of the present invention, unlike a general chemical storage battery, charges electric charges without inducing chemical changes of electrodes and electrolytes, so that there is no deterioration of electrodes or electrolytes due to repeated charging and discharging, and thus the life is long and the charging time is short. It does not have harmful substances, and the charging and discharging current and the charging capacity are great.
Description
본 발명은 전기 이중축 축전지에 관한 것으로서, 특히 전해질 용액중에 전극을 침윤시켜 전극의 전하와 반대 부호의 전하를 가진 이온이 전극 근방에 분포하여 형성된 전기 이중층에 전하를 축적하는 원리의 전기 이중층 축전지에 관한 것이다.BACKGROUND OF THE
전기 이중축 콘덴서는 전극과 전해질 계면의 이중층 용량을 이용한 콘덴서로서, 전해질 용액중에 전극을 침지하면 전극의 전하와 반대 부호의 전하를 갖는 이온이 전극 근방에 분포하여 전기 이중층이 형성된다.An electric double axis capacitor is a capacitor using a double layer capacity of an electrode and an electrolyte interface. When an electrode is immersed in an electrolyte solution, ions having a charge opposite to that of the electrode are distributed in the vicinity of the electrode to form an electric double layer.
전기 이중층은 이종물질의 계면에 특히 잘 나타나며, 이종물질과 접촉함으로써 계면부근의 전하 분포가 변화하거나 계면의 투과도가 양전하와 음전하에 따라서 달라지기 때문에 분극이 나타나면서 전기 이중층을 형성한다. 전기 이중축 축전지는 도 1에 도시한 바와 같이 이온을 함유하는 액체가 고체와 접촉할 때에 전극의 전하와 반대부호의 전하를 가진 이온이 전극(A)근방에 분포하여 전기 이중층을 형성하는데, 액상중의 전하 일부를 계면에 모여 고착층(B)을 형성하고 고착층 다음에 확산적으로 분포하여 확산층(C)을 형성하며, 나머지는 전기적으로 중성인 중합층(D)을 형성하므로써 이 전기 이중층에 전하를 축적하는 원리의 축전지이다.The electrical double layer is particularly well represented at the interface of the dissimilar material, and by contacting the dissimilar material, the electrical distribution is formed due to polarization because the charge distribution near the interface changes or the permeability of the interface varies depending on the positive and negative charges. As shown in FIG. 1, when a liquid containing ions comes into contact with a solid, ions having a charge opposite to that of the electrode are distributed near the electrode A to form an electric double layer, as shown in FIG. 1. A part of the charges at the interface are formed at the interface to form a fixed layer (B), diffusely distributed after the fixed layer to form a diffusion layer (C), and the rest of the electric double layer by forming an electrically neutral polymerization layer (D). It is a storage battery of the principle of accumulating charge.
종래의 전기 이중층 축전지는 전극재료로서 비표면적이 큰 활성탄을 사용하고 있으며, 수용액을 전해질로 사용하는 전기 이중층 축전지와 유기전해액을 전해질로 사용하는 전기 이중층 축전지로 대별되며, 수용액 전기 이중층 축전지는 내부저항이 적은 대신 내전압이 낮고, 유기전해액 전기 이중층 축전지는 내부 저항이 큰 대신 내전압이 높은 특성을 가지고 있다.Conventional electric double layer batteries use activated carbon having a large specific surface area as electrode materials, and are classified into electric double layer batteries using an aqueous solution as an electrolyte and electric double layer batteries using an organic electrolyte as an electrolyte. Instead of low, the withstand voltage is low, and the organic electrolyte electric double layer battery has a high withstand voltage instead of a large internal resistance.
수용액을 전해질로 사용하는 대표적인 전기 이중층 축전지는 전해질로서 전기 전도도가 좋고 증기압이 낮아서 불연성이기 때문에 안전성이 높은 황산을 쓰고, 집전체는 황산에 침식 당하지 않는 전도성 고분자를 사용하고 있다. 유기전해액을 전해질로 사용하는 전기 이중층 축전지는 유기용매에다 리튬염이나 4급 암모늄염을 용질로 쓰며 집전체로는 알루미늄과 같은 금속을 쓰고 있다.Representative electric double layer batteries using an aqueous solution as an electrolyte use sulfuric acid having high safety because of its high electrical conductivity and low vapor pressure, which is nonflammable, and the current collector uses a conductive polymer that is not eroded by sulfuric acid. An electric double layer battery using an organic electrolyte as an electrolyte uses a lithium salt or a quaternary ammonium salt as a solute in an organic solvent and a metal such as aluminum as a current collector.
전기 이중층 축전지의 충전 용량은 전극 표면적에 대해서 단위 면적당 20~30μF/㎠인 것으로 알려져 있으며, 비표며적이 큰 활성탄을 전극으로 사용하면 활성탄의 표면적이 단위무게당 107㎠/g에 달하므로 큰 충전용량을 가진 축전지의 제작이 가능하나 현재 충전용량이 이론치의 1/50 수준에도 못미치고 있다. 또, 전기 이중층 축전지의 충방전 전류와 충전 용량의 크기는 전해질과 집전체의 내부 저항에 크게 좌우되며, 집전체와 활성탄 전극의 접촉 저항과 전해액과 집전체의 재질에 따라서도 지대한 영향을 받는다.Charge capacity of an electric double layer storage battery is known to be the unit area 20 ~ 30μF / ㎠ with respect to electrode surface area, specific surface said enemy The large activated carbon as an electrode large charged surface area of the activated carbon it reached 10 7 ㎠ / g per unit weight It is possible to manufacture batteries with capacity, but the current charging capacity is less than 1/50 of theory. In addition, the magnitude of the charge / discharge current and the charge capacity of the electric double layer battery greatly depends on the internal resistance of the electrolyte and the current collector.
따라서 전기 이중축 축전지의 충반전 전류와 충전용량을 전기 전도도가 좋은 전해질과, 전기 전도도가 좋으면서 전해질에 침식당하지 않는 금속물질을 집전체로서의 선정 및 그 조합에 달려 있으며, 특히 전해질에 침식하지 않으면서 전기 전도도가 좋은 금속중에서도 금속의 종류에 따라서 충반전류와 충전용량이 크게 좌우된다.Therefore, the charging and discharging current and the charging capacity of the electric double-axis battery depend on the electrolyte having good electrical conductivity and the metal material having good electrical conductivity and not being eroded by the electrolyte as a current collector and a combination thereof. Among metals with good electrical conductivity, the charging current and the charging capacity largely depend on the type of metal.
그리고, 수용액 전기 이중축 축전지의 전도성 고분자와 유기전해액 전기 이중축 축전지의 유기 전해액은 전기 전도도가 좋지 않아서 전기 이중축 축전지의 충방전 전류를 제한할뿐만 아니라 충전 용량에도 지대한 영량을 미친다. 실제로 황산을 전해질로 쓰고 황산에 침식당하지 않는 금박막을 집전체로 사용하면 내부 저항이 작아져서 충전용량이 전도성 고분자를 집전체로 사용할때보다 수십배 증가는 하나, 금은 고가인 점 등 문제점이 있다.In addition, the conductive polymer of the aqueous electric double storage battery and the organic electrolyte of the electrolytic solution of the electric double storage battery have poor electrical conductivity, thereby limiting the charge / discharge current of the electric storage battery and limiting the charging capacity. In fact, when using sulfuric acid as an electrolyte and using a gold thin film that is not eroded by sulfuric acid as a current collector, the internal resistance decreases, and thus the charging capacity is increased several times than when using a conductive polymer as a current collector, but there is a problem that gold is expensive.
본 발명은 상기와 같은 점에 비추어 이를 극복하기 위한 여러가지 기술적 검토에 의해 이루어진 것이다.The present invention has been made by various technical considerations for overcoming this in light of the above.
따라서, 본 발명의 목적은 충방전의 반복에 의한 전극이나 전해액의 열화가 없이 수명이 길고, 충전시간이 짧으며, 유해물질을 갖지 않음은 물론, 사용온도 범위가 넓고, 충방전 전류가 충전용량을 대폭 크게 한 전기 이중층 축전지를 제공하는데 있다.Accordingly, an object of the present invention is to provide a long life, a short charging time, no harmful substances, a wide range of operating temperatures, and a charge / discharge current without charge or discharge due to repeated charge and discharge. It is to provide an electric double layer storage battery with a greatly increased value.
이와 같은 목적을 달성하기 위해, 본 발명은, 비표면적이 큰 고체 활성탄이나 탄소부식포로 이루어진 양극과 음극의 활성탄 전극과, 상기 활성탄 전극 바깥에 배치한 양극이나 음극의 집전체와, 상기 양극과 음극의 활성탄 전극 사이에 배치한 분리막과, 전해질 용액을 포함하는 전기 이중축 축전지에 있어서, 상기 집전체는 은박막이나 구리박막에다 은을 도금한 박막으로 하고, 은으로 된 집전체를 침식하지 않으면서 전기전도도가 좋은 수산화칼륨 용액을 전해질로 사용한다. 또, 수산화칼륨 용액에다 수산화리튬을 첨가하여 내전압을 높일 수 있으며, 다른 칼륨염 예를 들면 초산칼륨 용액을 전해질로 사용하여 수산화칼륨 용액보다 내전압을 두 배 이상 높일 수 있다.In order to achieve the above object, the present invention provides an activated carbon electrode of a positive electrode and a negative electrode made of solid activated carbon or carbon corrosion cloth having a large specific surface area, a current collector of a positive electrode or negative electrode disposed outside the activated carbon electrode, and the positive electrode and negative electrode. In an electric double storage battery comprising a separator disposed between activated carbon electrodes and an electrolyte solution, the current collector is a thin film of silver plated on a silver thin film or a copper thin film, and the silver current collector is not eroded. Potassium hydroxide solution with good electrical conductivity is used as electrolyte. In addition, it is possible to increase the breakdown voltage by adding lithium hydroxide to the potassium hydroxide solution, and can increase the breakdown voltage more than twice as much as the potassium hydroxide solution by using another potassium salt, for example, potassium acetate solution as an electrolyte.
도 1은 전기 이중축 축전지의 개념도.1 is a conceptual diagram of an electric dual storage battery.
도 2는 본 발명의 전기 이중축 축전지의 원리 구성도.2 is a principle configuration diagram of the electric dual storage battery of the present invention.
도 3은 본 발명의 전기 이중축 축전지의 적층형 구성도.3 is a laminated configuration diagram of an electric dual storage battery of the present invention.
도 4는 본 발명의 전기 이중축 축전지의 권취형 구성도.4 is a wound configuration diagram of an electric dual storage battery of the present invention.
*도면의 주요 부분에 대한 부호의 설명** Description of the symbols for the main parts of the drawings *
1 : 양극집전체2 : 양극 활성탄 전극1: positive electrode current collector 2: positive electrode activated carbon electrode
3 : 분리막4 : 음극 활성탄 전극3: Separation membrane 4: Cathode activated carbon electrode
5 : 음극 집전체5: negative electrode current collector
이하 본 발명을 첨부된 도면에 의거 설명한다.Hereinafter, the present invention will be described with reference to the accompanying drawings.
도 2에 도시된 바와 같이, 본 발명의 전기 이중축 축전지는 양극과 음극의 집전체(1, 5)로서 은박막이나 구리박막에다 은을 도금한 박막으로 하고, 양극과 음극의 활성탄 전극(2, 4)으로서 비표면적이 큰 고체 활성탄이나 탄소 부직포를 사용하며, 양극과 음극의 활성탄 전극사이의 분리막(3)을 두어서 양극부분과 음극부분을 절연시키면서 이온의 이동을 용이하게 한 구성으로 되어 있다.As shown in FIG. 2, the electric double-axis battery of the present invention is a thin film of silver plated silver or copper thin film as the
전해질 용액으로서는 무게비로 30~50%의 수산화칼륨 용액을 사용하고 이 전해질 용액에 의해 침식당하지 않도록 하기 위해 은으로 된 집전체(1, 5)를 사용한다. 다시말해 수산화칼륨 용액은 전기전도도가 좋을뿐만 아니라 사용온도 범위가 넓고, 은은 전기전도도가 크고 수산화칼륨 용액에 침식당하지 않으며 박막으로 집전체를 만들수 있어서 활성탄 전극의 구성비를 높여 단위부피와 중량당 충전용량을 크게할 수 있다. 물론 수산화칼륨 용액에 침식당하지 않는 다른 금속을 집전체로 사용할 수 있으나 은이 다른 금속에 비해서 충방전 전류와 충전용량이 월등히 높으며, 은의 경제성을 감안하여 구리박막에다 은을 도금하여 집전체로 사용할 수가 있다.As the electrolyte solution, a 30-50% potassium hydroxide solution is used as the weight ratio, and silver
다른 칼륨염, 예를 들면 초산칼륨 수용액을 전해지로 사용하여 수산화칼륨 용액보다 내전압을 두 배 이상 높일 수 있으며, 수산화칼륨 용액에 수산화 리튬을 첨가하여 내전압을 높일 수도 있다.Another potassium salt, for example, an aqueous potassium acetate solution, may be used as an electrolytic cell to increase the withstand voltage more than twice as much as the potassium hydroxide solution, and may be increased by adding lithium hydroxide to the potassium hydroxide solution.
본 발명에 의한 전기 이중층 축전지는 도 3에서와 같이 적층형이나, 도 4에서와 같이 권취형으로 구성할 수 있으며, 본 발명의 범위는 전기 이중층 축전지의 구조, 탄소전극의 제작방법이나 분리막의 종류에 제한되지 않으며, 본 발명의 원리내에서 보다 다양한 변경이 가능하다.The electric double layer accumulator according to the present invention can be laminated as shown in FIG. 3, but can be configured as a wound type as shown in FIG. 4, and the scope of the present invention is based on the structure of the electric double layer accumulator, the method of manufacturing the carbon electrode, and the type of separator. There is no limitation, and more various changes are possible within the principles of the present invention.
이상과 같이 본 발명에 의하면, 충방전 전류는 기존의 전기 이중층 축전지보다 크며, 충전용량 역시 기존의 이중층 축전지보다 대폭 증가하여 거의 이론치에 육박하는 효과가 있다.According to the present invention as described above, the charge and discharge current is larger than the conventional electric double layer storage battery, the charging capacity is also significantly increased than the existing double layer storage battery has an effect almost close to the theoretical value.
Claims (3)
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| KR1019970009720A KR100249950B1 (en) | 1997-03-21 | 1997-03-21 | Electric double-layer capacitor |
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| KR1019970009720A KR100249950B1 (en) | 1997-03-21 | 1997-03-21 | Electric double-layer capacitor |
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| KR100249950B1 true KR100249950B1 (en) | 2000-03-15 |
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