JP2002222741A - Method of manufacturing polarizable electrode for electric double layer capacitor and electric double layer capacitor using the same - Google Patents
Method of manufacturing polarizable electrode for electric double layer capacitor and electric double layer capacitor using the sameInfo
- Publication number
- JP2002222741A JP2002222741A JP2001018160A JP2001018160A JP2002222741A JP 2002222741 A JP2002222741 A JP 2002222741A JP 2001018160 A JP2001018160 A JP 2001018160A JP 2001018160 A JP2001018160 A JP 2001018160A JP 2002222741 A JP2002222741 A JP 2002222741A
- Authority
- JP
- Japan
- Prior art keywords
- activated carbon
- carbon powder
- electric double
- double layer
- layer capacitor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
Description
【０００１】[0001]
【発明の属する技術分野】本発明は電気二重層キャパシ
タに用いられる電気二重層キャパシタ用分極性電極の製
造方法およびその分極性電極を用いた電気二重層キャパ
シタに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a polarizable electrode for an electric double layer capacitor used for an electric double layer capacitor, and an electric double layer capacitor using the polarizable electrode.
【０００２】[0002]
【従来の技術】電気二重層キャパシタは、マイクロコン
ピューター、メモリ素子、タイマーなどのバックアップ
電源用として利用されている。2. Description of the Related Art Electric double layer capacitors are used as backup power sources for microcomputers, memory devices, timers and the like.
【０００３】この種の電気二重層キャパシタの構成は、
図３に示すように厚さ２０〜５０μｍのアルミニウム箔
３１に外部引き出しリード線３４、３５を取り付け、こ
のアルミニウム箔３１の表面には活性炭粉末に所望の結
合剤及び導電剤を混合した混合粉末からなるペーストを
塗布して導電層（図示せず）を形成し、その上に活性炭
を主成分とした活性炭素層が形成されており、このアル
ミニウム箔３１に活性炭素層が形成された分極性電極３
２をその間にセパレータ３３を介在させて対面するよう
にして巻回することによりコンデンサ素子３６を形成
し、このコンデンサ素子３６を電解液中に浸漬して分極
性電極３２とセパレータ３３に電解液（図示せず）を含
浸した後、アルミニウムケース３８に挿入してパッキン
３７を用いてアルミニウムケース３８の開口部を封口し
た構成になっている。The structure of this type of electric double layer capacitor is as follows.
As shown in FIG. 3, external lead wires 34 and 35 are attached to an aluminum foil 31 having a thickness of 20 to 50 μm, and the surface of the aluminum foil 31 is made of a mixed powder obtained by mixing activated carbon powder with a desired binder and conductive agent. A conductive layer (not shown) is formed by applying a paste, and an activated carbon layer containing activated carbon as a main component is formed thereon. A polarizable electrode having an activated carbon layer formed on this aluminum foil 31 3
2 is wound so as to face each other with a separator 33 interposed therebetween, thereby forming a capacitor element 36. The capacitor element 36 is immersed in an electrolytic solution and the polarizable electrode 32 and the separator 33 are immersed in the electrolytic solution ( (Not shown), and inserted into an aluminum case 38, and the opening of the aluminum case 38 is sealed using a packing 37.
【０００４】上記分極性電極３２の製造方法は、例え
ば、特開平４−６７６１０号公報に記載された技術で
は、活性炭粉末、カーボンブラック、若干のバインダー
を乾式で混練することにより、バインダーと活性炭粉末
の結着力が強固になり、このため、分極性電極をロール
状に成形しても圧縮力やせん断力による欠陥が生じにく
いということが記載されている。The method of manufacturing the polarizable electrode 32 is disclosed in, for example, Japanese Patent Application Laid-Open No. 4-67610, in which activated carbon powder, carbon black, and a small amount of binder are kneaded in a dry system to form a binder and activated carbon powder. It is described that the binding force becomes strong, so that even if the polarizable electrode is formed into a roll, defects due to compressive force and shear force are unlikely to occur.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら上記従来
の分極性電極３２の製造方法では、活性炭粉末と結合剤
及び導電剤の分散状態が問題となり、活性炭粉末と結合
剤及び導電剤をただ単に混合しただけでは分極性電極の
抵抗（以下、ＥＳＲと称す）が大きくなるという課題を
有している。However, in the above-mentioned conventional method for manufacturing the polarizable electrode 32, the dispersed state of the activated carbon powder, the binder and the conductive agent is problematic, and the activated carbon powder is simply mixed with the binder and the conductive agent. However, there is a problem that the resistance of the polarizable electrode alone (hereinafter, referred to as ESR) increases.
【０００６】また、上記特開平４−６７６１０号公報に
記載された技術では、活性炭粉末、カーボンブラック、
若干のバインダーを乾式で混練すると圧縮力やせん断力
が向上することにより成形性を良くすることができる
が、上記混練条件によっては分極性電極の静電容量およ
びＥＳＲ特性を向上させることができず、その混練条件
の最適化を図ることが困難であるという課題を有してい
る。In the technique described in the above-mentioned Japanese Patent Application Laid-Open No. 4-67610, activated carbon powder, carbon black,
If a small amount of binder is kneaded dry, the formability can be improved by improving the compressive force and shear force, but the electrostatic capacity and ESR characteristics of the polarizable electrode cannot be improved depending on the kneading conditions. However, there is a problem that it is difficult to optimize the kneading conditions.
【０００７】本発明は上記従来の課題を解決するもの
で、活性炭粉末の分散性を高めて分極性電極のＥＳＲ特
性を小さくし、集電効率および静電容量に優れた電気二
重層キャパシタ用分極性電極の製造方法およびその分極
性電極を用いた電気二重層キャパシタを提供することを
目的とするものである。SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems. An object of the present invention is to improve the dispersibility of activated carbon powder, reduce the ESR characteristics of a polarizable electrode, and provide an electric double layer capacitor excellent in current collection efficiency and capacitance. It is an object of the present invention to provide a method for manufacturing a polar electrode and an electric double layer capacitor using the polarizable electrode.
【０００８】[0008]
【課題を解決するための手段】上記課題を解決するため
に本発明の請求項１に記載の発明は、活性炭粉末と、こ
の活性炭粉末よりも小さい粒径の導電性付与剤と、樹脂
を溶解または分散した少量の水溶性バインダー溶液を混
練する工程と、さらにこの混練品に分散溶媒を少しずつ
添加して所定の粘度まで混練してペーストにする工程
と、このペーストを集電金属箔に塗布して分散溶媒を除
去する工程とからなる製造方法とするもので、活性炭粉
末と導電性付与剤の分散性を高めて圧縮力やせん断力を
向上させることができるので、ＥＳＲ特性および静電容
量に優れた分極性電極を得ることができるという作用を
有する。Means for Solving the Problems In order to solve the above-mentioned problems, the invention according to claim 1 of the present invention provides an activated carbon powder, a conductivity-imparting agent having a particle size smaller than the activated carbon powder, and a resin. Or a step of kneading a small amount of a dispersed water-soluble binder solution, a step of gradually adding a dispersion solvent to the kneaded product and kneading to a predetermined viscosity to form a paste, and applying the paste to a current collector metal foil And removing the dispersing solvent by performing the method described above. Since the dispersibility of the activated carbon powder and the conductivity-imparting agent can be increased to improve the compressive force and the shear force, the ESR characteristics and the capacitance can be improved. This has the effect that a polarizable electrode having excellent characteristics can be obtained.
【０００９】請求項２に記載の発明は、活性炭粉末と、
この活性炭粉末よりも小さい粒径の導電性付与剤と、樹
脂を溶解または分散した少量の水溶性バインダー溶液を
混練する工程と、さらにこの混練品に分散溶媒を少しず
つ添加して所定の粘度まで混練してペーストにする工程
と、このペーストを成形して分散溶媒を除去する工程と
からなる製造方法とするもので、活性炭粉末と導電性付
与剤の分散性を高めて圧縮力やせん断力を向上させるこ
とができるので、ＥＳＲ特性および静電容量に優れた分
極性電極の成形体を得ることができるという作用を有す
る。The invention according to claim 2 is characterized in that the activated carbon powder comprises:
A step of kneading a conductivity-imparting agent having a particle size smaller than that of the activated carbon powder and a small amount of a water-soluble binder solution in which the resin is dissolved or dispersed, and further adding a dispersion solvent little by little to the kneaded product to a predetermined viscosity. It is a manufacturing method consisting of a step of kneading into a paste and a step of shaping the paste to remove a dispersing solvent, increasing the dispersibility of the activated carbon powder and the conductivity-imparting agent to increase the compressive force and the shearing force. Since it can be improved, it has an effect that a molded article of a polarizable electrode having excellent ESR characteristics and capacitance can be obtained.
【００１０】請求項３に記載の発明は、請求項１または
２に記載の発明において、導電性付与剤の平均粒径を活
性炭粉末の平均粒径の１／１０以下とする製造方法とし
たもので、活性炭粉末と導電性付与剤の分散性を高めて
分極性電極の密度を向上させることができるという作用
を有する。A third aspect of the present invention is the method according to the first or second aspect, wherein the average particle size of the conductivity-imparting agent is 1/10 or less of the average particle size of the activated carbon powder. Thus, the dispersibility of the activated carbon powder and the conductivity-imparting agent can be increased to improve the density of the polarizable electrode.
【００１１】請求項４に記載の発明は、請求項１または
２に記載の発明において、活性炭粉末を石油コークス系
活性炭とし、その表面官能基量を０．１〜１．０ｍｅｑ
／ｇの範囲とした製造方法としたもので、石油コークス
系活性炭を用いることによりその表面官能基量を規制し
やすくなり、この規制した分極性電極より得られる電気
二重層キャパシタの直流漏れ電流を低くし、自己放電を
抑えることができるという作用を有する。According to a fourth aspect of the present invention, in the first or second aspect, the activated carbon powder is made of petroleum coke-based activated carbon, and its surface functional group content is 0.1 to 1.0 meq.
/ G of the production method, the use of petroleum coke-based activated carbon makes it easier to regulate the amount of surface functional groups, and reduces the DC leakage current of the electric double layer capacitor obtained from the regulated polarizable electrode. This has the effect of lowering the temperature and suppressing self-discharge.
【００１２】なお、上記石油コークス系活性炭の表面官
能基量を０．１ｍｅｑ／ｇ未満にすると分散溶媒との湿
潤性が悪くなり分散性を高めることができず、また、
１．０ｍｅｑ／ｇを越えると直流漏れ電流が高くなり、
自己放電を抑えることができなくなるので好ましくな
い。When the surface functional group content of the petroleum coke-based activated carbon is less than 0.1 meq / g, the wettability with the dispersing solvent is deteriorated, and the dispersibility cannot be increased.
If it exceeds 1.0 meq / g, the DC leakage current increases,
It is not preferable because self-discharge cannot be suppressed.
【００１３】請求項５に記載の発明は、活性炭粉末とこ
の活性炭粉末よりも小さい粒径の導電性付与剤と樹脂を
溶解または分散した少量の水溶性バインダー溶液を混練
し、さらにこの混練品に分散溶液を少しずつ添加して所
定の粘度まで混練したペーストを集電金属箔に塗布し分
散溶媒を除去して構成した分極性電極をセパレータを介
して巻回してコンデンサ素子とし、このコンデンサ素子
に電解液を含浸したものをアルミニウムケースに封入し
てなる電気二重層キャパシタであり、ＥＳＲ特性、静電
容量の優れたものとすることができる。[0013] The invention according to claim 5 is to knead an activated carbon powder, a conductivity imparting agent having a particle size smaller than the activated carbon powder, and a small amount of a water-soluble binder solution in which a resin is dissolved or dispersed. A paste obtained by adding a dispersion solution little by little and kneading to a predetermined viscosity is applied to a current collecting metal foil, and a dispersing solvent is removed. This is an electric double layer capacitor in which an electrolyte impregnated is sealed in an aluminum case, and can have excellent ESR characteristics and capacitance.
【００１４】請求項６に記載の発明は、活性炭粉末とこ
の活性炭粉末よりも小さい粒径の導電性付与剤と樹脂を
溶解または分散した少量の水溶性バインダー溶液を混練
し、この混練品に分散溶媒を少しずつ添加して所定の粘
度まで混練したペーストを成形して分散溶媒を除去して
構成した分極性電極をセパレータを介して電解液ととも
に下底部と上蓋部内に封入した電気二重層キャパシタで
あり、ＥＳＲ特性、静電容量に優れたものとすることが
できる。According to a sixth aspect of the present invention, an activated carbon powder, a conductivity-imparting agent having a particle size smaller than the activated carbon powder, and a small amount of a water-soluble binder solution obtained by dissolving or dispersing a resin are kneaded and dispersed in the kneaded product. An electric double layer capacitor in which a polarizable electrode formed by forming a paste kneaded to a predetermined viscosity by adding a solvent little by little and removing the dispersing solvent, together with an electrolytic solution through a separator in a lower bottom portion and an upper lid portion, is formed. Yes, it can be excellent in ESR characteristics and capacitance.
【００１５】[0015]
【発明の実施の形態】（実施の形態１）図１（ａ）、
（ｂ）は本発明の実施の形態１による巻回型の電気二重
層キャパシタの模式的な部分切欠き斜視図と分極性電極
の要部拡大断面図である。同図において、３は集電金属
箔１の表面上に活性炭素層２を形成した一対の分極性電
極である。５および６は上記集電金属箔１に取り付けら
れた外部引き出しリード線で、上記一対の分極性電極３
をその間にセパレータ４を介在させて対面するように巻
回してコンデンサ素子７を得る。(Embodiment 1) FIG. 1 (a),
2B is a schematic partial cutaway perspective view of the wound electric double layer capacitor according to the first embodiment of the present invention, and an enlarged sectional view of a main part of a polarizable electrode. FIG. In the figure, reference numeral 3 denotes a pair of polarizable electrodes having an activated carbon layer 2 formed on the surface of a current collecting metal foil 1. Reference numerals 5 and 6 denote external lead wires attached to the current collecting metal foil 1, and the pair of polarizable electrodes 3.
Is wound so as to face each other with the separator 4 interposed therebetween to obtain the capacitor element 7.
【００１６】上記コンデンサ素子７に電解液（図示せ
ず）を含浸した後、有底円筒状のアルミニウムケース９
に挿入し、このアルミニウムケース９の開口部を上記外
部引き出しリード線５、６が貫通する孔を設けた封口材
８を用いて封止されている。After the capacitor element 7 is impregnated with an electrolytic solution (not shown), a cylindrical aluminum case 9 having a bottom is formed.
The opening of the aluminum case 9 is sealed with a sealing material 8 provided with a hole through which the external lead wires 5 and 6 pass.
【００１７】上記分極性電極３に用いられる集電金属箔
１は、タンタル、アルミニウム、チタンなどの弁金属が
利用できる。また、これらの元素を含んで弁作用を生じ
る合金、例えばチタンを含むアルミニウム系合金なども
利用できる。最も好ましいのはアルミニウムで、特に高
純度アルミニウムである。As the current collecting metal foil 1 used for the polarizable electrode 3, a valve metal such as tantalum, aluminum, or titanium can be used. Further, an alloy which contains these elements and produces a valve action, for example, an aluminum-based alloy containing titanium can also be used. Most preferred is aluminum, especially high purity aluminum.
【００１８】この集電金属箔１は所望厚みのシートに成
形されている。シートの厚みは１０μｍ〜１００μｍの
範囲が採用されるが、巻回するときの引っ張り強度およ
び巻径を小さくして小型化するために、好ましくは２０
〜６０μｍの箔が良い。The current collecting metal foil 1 is formed into a sheet having a desired thickness. The thickness of the sheet is in the range of 10 μm to 100 μm.
箔 60 μm foil is good.
【００１９】また、集電金属箔１の表面はエッチングな
どで粗面化されていても良い。例えば、エッチングする
方法としては酸性溶液中で化学的及び／又は電気的にエ
ッチングされるものである。The surface of the current collecting metal foil 1 may be roughened by etching or the like. For example, an etching method is a method of chemically and / or electrically etching in an acidic solution.
【００２０】上記集電金属箔１の表面を粗面化すること
で、活性炭素層との接触面積が増し、よりＥＳＲ特性を
低減することができる。By roughening the surface of the current collecting metal foil 1, the contact area with the activated carbon layer increases, and the ESR characteristics can be further reduced.
【００２１】次に、上記活性炭素層２は活性炭粉末と、
この活性炭粉末よりも小さい粒径の導電性付与剤と、樹
脂を溶解または分散した少量の水溶性バインダー溶液を
混練する工程と、さらにこの混練品に分散溶媒を少しず
つ添加して所定の粘度まで混練してペーストにする工程
と、このペーストを集電金属箔に塗布して分散溶媒を除
去する工程とから製造することにより得られる。Next, the activated carbon layer 2 comprises activated carbon powder,
A step of kneading a conductivity-imparting agent having a particle size smaller than that of the activated carbon powder and a small amount of a water-soluble binder solution in which a resin is dissolved or dispersed, and further adding a dispersion solvent little by little to the kneaded product to a predetermined viscosity. It is obtained by manufacturing from a step of kneading into a paste and a step of applying the paste to a current collector metal foil to remove a dispersion solvent.
【００２２】このことにより、活性炭粉末と導電性付与
剤の分散性を高めて圧縮力やせん断力を向上させること
ができるので、ＥＳＲ特性および静電容量に優れた分極
性電極を得ることができる。[0022] This makes it possible to enhance the dispersibility of the activated carbon powder and the conductivity-imparting agent to improve the compressive force and the shear force, thereby obtaining a polarizable electrode having excellent ESR characteristics and electrostatic capacity. .
【００２３】上記導電性付与剤の平均粒径を活性炭粉末
の平均粒径の１／１０以下とすることにより、活性炭粉
末と導電性付与剤の分散性を高めて分極性電極３の密度
を向上させることができる。By setting the average particle size of the above-mentioned conductivity-imparting agent to 1/10 or less of the average particle size of the activated carbon powder, the dispersibility of the activated carbon powder and the conductivity-imparting agent is increased, and the density of the polarizable electrode 3 is improved. Can be done.
【００２４】また、活性炭粉末を石油コークス系活性炭
とし、その表面官能基量を０．１〜１．０ｍｅｑ／ｇの
範囲とすることにより、この分極性電極３より得られる
電気二重層キャパシタの直流漏れ電流を低くし、自己放
電を抑えることができる。When the activated carbon powder is made of petroleum coke-based activated carbon and its surface functional group content is in the range of 0.1 to 1.0 meq / g, the direct current of the electric double layer capacitor obtained from the polarizable electrode 3 is reduced. Leakage current can be reduced and self-discharge can be suppressed.
【００２５】以下、実施の形態１の具体的な実施例を説
明する。Hereinafter, a specific example of the first embodiment will be described.
【００２６】（実施例１）集電金属箔として厚さ３０μ
ｍの高純度アルミニウム箔（Ａｌ：９９．９９％以上）
を使用し、塩酸系のエッチング液中で電解エッチングし
てアルミニウム箔の表面を粗面化した。(Example 1) 30 μm thick as current collecting metal foil
m high-purity aluminum foil (Al: 99.99% or more)
Was used and electrolytic etching was performed in a hydrochloric acid-based etching solution to roughen the surface of the aluminum foil.
【００２７】次に、このアルミニウム箔の表面に活性炭
素層を形成した。この活性炭素層の形成は、平均粒径５
μｍの石油コークス系活性炭粉末（表面官能基量：０．
５ｍｅｑ／ｇ）と導電性付与剤として平均粒径０．０５
μｍのカーボンブラック、カルボキシメチルセルロース
（以下、ＣＭＣと略す）を溶解した水溶性バインダー溶
液（ＣＭＣ濃度：５０％）を１０：２：１の重量比に混
合して混練機で十分に混練した後、メタノールと水の分
散溶媒を少しずつ加えてさらに混練して所定の粘度を有
したペーストを作製し、その後、このペーストをアルミ
ニウム箔の表面に塗布して１００℃の大気中で１時間乾
燥して形成した。Next, an activated carbon layer was formed on the surface of the aluminum foil. The formation of this activated carbon layer is based on an average particle size of 5
μm petroleum coke-based activated carbon powder (surface functional group content: 0.
5meq / g) and an average particle diameter of 0.05 as a conductivity-imparting agent.
After mixing a water-soluble binder solution (CMC concentration: 50%) in which μm of carbon black and carboxymethyl cellulose (hereinafter abbreviated as CMC) are dissolved in a weight ratio of 10: 2: 1 and sufficiently kneaded with a kneader, A dispersion solvent of methanol and water is added little by little and further kneaded to prepare a paste having a predetermined viscosity. Thereafter, the paste is applied to the surface of an aluminum foil and dried in an atmosphere at 100 ° C. for 1 hour. Formed.
【００２８】次いで、この活性炭素層が形成されたアル
ミニウム箔を３０ｍｍ×４００ｍｍの寸法に切断して２
枚１組の分極性電極を得た。Next, the aluminum foil on which the activated carbon layer was formed was cut into a size of 30 mm × 400 mm to obtain 2 mm.
One set of polarizable electrodes was obtained.
【００２９】次に、分極性電極のアルミニウム箔に外部
引き出しリード線を取り付け、２枚の分極性電極が厚さ
５０μｍのセパレータを介して対面するように配置し、
巻回してコンデンサ素子を得た。Next, an external lead wire is attached to the aluminum foil of the polarizable electrode, and the two polarizable electrodes are arranged so as to face each other via a separator having a thickness of 50 μm.
This was wound to obtain a capacitor element.
【００３０】次に、このコンデンサ素子に電解液を含浸
させた。この電解液はプロピレンカーボネートに４エチ
ルアンモニウム４フッ化ホウ素を溶解したものを用い
た。Next, the capacitor element was impregnated with an electrolytic solution. The electrolytic solution used was one obtained by dissolving 4-ethylammonium boron tetrafluoride in propylene carbonate.
【００３１】その後、このコンデンサ素子を有底筒状の
アルミニウムケースに挿入し、封口材を用いて封口して
巻回型の電気二重層キャパシタを得た。Thereafter, this capacitor element was inserted into a bottomed cylindrical aluminum case and sealed with a sealing material to obtain a wound electric double layer capacitor.
【００３２】（実施例２）上記実施例１において、石油
コークス系活性炭粉末の表面官能基量を０．１ｍｅｑ／
ｇのものを用いた以外は実施例１と同様にして巻回型の
電気二重層キャパシタを得た。Example 2 In Example 1, the amount of surface functional groups of the petroleum coke-based activated carbon powder was set to 0.1 meq /
A wound-type electric double layer capacitor was obtained in the same manner as in Example 1 except that g was used.
【００３３】（実施例３）上記実施例１において、石油
コークス系活性炭粉末の表面官能基量を１．０ｍｅｑ／
ｇのものを用いた以外は実施例１と同様にして巻回型の
電気二重層キャパシタを得た。Example 3 In Example 1, the surface functional group content of the petroleum coke-based activated carbon powder was set to 1.0 meq /
A wound-type electric double layer capacitor was obtained in the same manner as in Example 1 except that g was used.
【００３４】（実施例４）上記実施例１において、石油
コークス系活性炭粉末の表面官能基量を０．０５ｍｅｑ
／ｇのものを用いた以外は実施例１と同様にして巻回型
の電気二重層キャパシタを得た。Example 4 In Example 1, the amount of surface functional groups in the petroleum coke-based activated carbon powder was set to 0.05 meq.
/ G was obtained in the same manner as in Example 1 except that the capacitor of the present invention was used.
【００３５】（実施例５）上記実施例１において、石油
コークス系活性炭粉末の表面官能基量を１．５ｍｅｑ／
ｇのものを用いた以外は実施例１と同様にして巻回型の
電気二重層キャパシタを得た。Example 5 In Example 1, the amount of surface functional groups of the petroleum coke-based activated carbon powder was set to 1.5 meq /
A wound-type electric double layer capacitor was obtained in the same manner as in Example 1 except that g was used.
【００３６】（実施例６）上記実施例１において、集電
金属箔として厚さ２０μｍのチタン箔を用いた以外は実
施例１と同様にして巻回型の電気二重層キャパシタを得
た。Example 6 A wound electric double layer capacitor was obtained in the same manner as in Example 1 except that a titanium foil having a thickness of 20 μm was used as the current collecting metal foil.
【００３７】（実施例７）上記実施例１において、集電
金属箔として厚さ１５μｍのチタン箔を用いた以外は実
施例１と同様にして巻回型の電気二重層キャパシタを得
た。Example 7 A wound electric double layer capacitor was obtained in the same manner as in Example 1 except that a 15 μm thick titanium foil was used as the current collecting metal foil.
【００３８】（比較例１）上記実施例１において、活性
炭素層の形成を、平均粒径５μｍの石油コークス系活性
炭粉末（表面官能基量：０．４ｍｅｑ／ｇ）と導電性付
与剤として平均粒径０．０５μｍのカーボンブラック、
ＣＭＣを溶解した水溶性バインダー溶液（ＣＭＣ濃度：
５０％）を１０：２：２の重量比に混合して混練機で混
練して所定の粘度を有したペーストを作製し、その後、
このペーストをアルミニウム箔の表面に塗布して、１０
０℃の大気中で１時間乾燥して形成した以外は実施例１
と同様にして巻回型の電気二重層キャパシタを得た。(Comparative Example 1) In Example 1, the formation of the activated carbon layer was carried out by using a petroleum coke-based activated carbon powder (surface functional group content: 0.4 meq / g) having an average particle diameter of 5 μm and a conductivity-imparting agent. Carbon black having a particle size of 0.05 μm,
Water-soluble binder solution in which CMC is dissolved (CMC concentration:
50%) in a weight ratio of 10: 2: 2, and kneaded with a kneader to produce a paste having a predetermined viscosity.
This paste is applied to the surface of aluminum foil and
Example 1 except that it was formed by drying for 1 hour in the air at 0 ° C.
In the same manner as in the above, a wound electric double layer capacitor was obtained.
【００３９】これら実施例１〜７および比較例１の巻回
型の電気二重層キャパシタを２．５Ｖ定電圧で１時間充
電して、次いで、１００ｍＡ定電流で放電した時の静電
容量（Ｃ）およびＥＳＲ特性を測定した。さらに、巻回
型の電気二重層キャパシタは、７５℃恒温槽中で２．８
Ｖ定電圧で充電された状態で３０００時間保持した後、
１００ｍＡ定電流で放電し、同様にして静電容量（Ｃ）
とＥＳＲ特性を測定した。その結果を（表１）に示す。The wound type electric double layer capacitors of Examples 1 to 7 and Comparative Example 1 were charged at a constant voltage of 2.5 V for 1 hour, and then discharged at a constant current of 100 mA (C ) And ESR characteristics were measured. Furthermore, the wound type electric double layer capacitor is 2.8 in a 75 ° C. constant temperature bath.
After holding for 3000 hours in a state charged with V constant voltage,
Discharge at a constant current of 100 mA, and similarly, capacitance (C)
And ESR characteristics were measured. The results are shown in (Table 1).
【００４０】[0040]
【表１】 [Table 1]
【００４１】（表１）中のΔＣとΔＥＳＲとは、初期の
静電容量（Ｃ）とＥＳＲ特性の値に対して、上記条件下
での３０００時間後の静電容量（Ｃ）とＥＳＲ特性の値
の変化率をそれぞれ示している。ΔC and ΔESR in Table 1 are the capacitance (C) and the ESR characteristic after 3000 hours under the above conditions with respect to the initial capacitance (C) and the value of the ESR characteristic. Are shown respectively.
【００４２】なお、試験個数は各５０個であり、静電容
量、ＥＳＲ特性はその平均値で示してある。The number of tests is 50 each, and the capacitance and ESR characteristics are shown by their average values.
【００４３】（表１）から明らかなように、実施例１〜
３および実施例６、７の巻回型電気二重層キャパシタ
は、比較例１の巻回型の電気二重層キャパシタに比べ
て、活性炭素層の活性炭粉末と導電性付与剤の分散性を
高めることができるため、初期のＥＳＲ特性が低く、ま
た３０００時間後のΔＣ、ΔＥＳＲの変化が少ないこと
が理解される。As is clear from Table 1, Examples 1 to
The wound type electric double layer capacitors of Example 3 and Examples 6 and 7 have higher dispersibility of the activated carbon powder of the activated carbon layer and the conductivity-imparting agent than the wound type electric double layer capacitor of Comparative Example 1. Therefore, it can be understood that the initial ESR characteristics are low and the changes in ΔC and ΔESR after 3000 hours are small.
【００４４】また、実施例４および５は石油コークス系
活性炭粉末の表面官能基量が０．０５ｍｅｑ／ｇと１．
５ｍｅｑ／ｇのものを用いた巻回型の電気二重層キャパ
シタは、３０００時間後のΔＣ、ΔＥＳＲの変化が大き
くなるので、石油コークス系活性炭粉末の表面官能基量
は０．１〜１．０ｍｅｑ／ｇの範囲が好ましい。In Examples 4 and 5, the petroleum coke-based activated carbon powder had a surface functional group content of 0.05 meq / g and 1.
A wound type electric double layer capacitor using 5 meq / g has a large change in ΔC and ΔESR after 3000 hours. Therefore, the amount of surface functional groups of the petroleum coke-based activated carbon powder is 0.1 to 1.0 meq. / G is preferred.
【００４５】なお、実施例１〜７の巻回型の電気二重層
キャパシタは、液漏れは１個もなく、比較例１は液漏れ
が４個発生した。In the wound type electric double layer capacitors of Examples 1 to 7, no liquid leakage occurred, and in Comparative Example 1, four liquid leakages occurred.
【００４６】（実施の形態２）図２は本発明の実施の形
態２によるボタン型の電気二重層キャパシタの構成を示
す部分切欠き斜視図である。同図において、１１ａ、１
１ｂは一対の分極性電極で、上記一対の分極性電極１１
ａ、１１ｂはセパレータ１２を介して対面するように配
置されている。また、この分極性電極１１ａ、１１ｂお
よびセパレータ１２には電解液（図示せず）が含浸され
ている。(Embodiment 2) FIG. 2 is a partially cutaway perspective view showing a configuration of a button-type electric double layer capacitor according to Embodiment 2 of the present invention. In the figure, 11a, 1
1b is a pair of polarizable electrodes, and the pair of polarizable electrodes 11
a and 11b are arranged so as to face each other with the separator 12 interposed therebetween. The polarizable electrodes 11a and 11b and the separator 12 are impregnated with an electrolytic solution (not shown).
【００４７】上記一対の分極性電極１１ａ、１１ｂは下
底部１５と上蓋部１６により、その周縁部を絶縁性のリ
ングパッキン１４を介して密閉されるように接合されて
いる。このとき、分極性電極１１ａと上蓋部１６の間お
よび分極性電極１１ｂと下底部１５の間にはカーボン導
電層１３ａおよび１３ｂが介在している。The pair of polarizable electrodes 11a and 11b are joined by a lower bottom part 15 and an upper lid part 16 so that their peripheral parts are hermetically sealed via an insulating ring packing 14. At this time, the carbon conductive layers 13a and 13b are interposed between the polarizable electrode 11a and the upper lid portion 16 and between the polarizable electrode 11b and the lower bottom portion 15.
【００４８】上記構成において、分極性電極１１ａ、１
１ｂは活性炭粉末と活性炭粉末よりも小さい粒径の導電
性付与剤と樹脂を溶解または分散した水溶性バインダー
溶液を少量添加して混練する工程と、さらに分散溶媒を
少しずつ添加して所定の粘度まで混練してペーストにす
る工程と、このペーストを成形して分散溶媒を除去する
工程とから製造することにより得られる。In the above configuration, the polarizable electrodes 11a, 1
1b is a step of adding and kneading a small amount of an activated carbon powder and a water-soluble binder solution in which a conductive agent and a resin having a particle size smaller than that of the activated carbon powder are dissolved or dispersed, and further adding a dispersion solvent little by little to a predetermined viscosity. And a process of shaping the paste to remove the dispersion solvent.
【００４９】このことにより、活性炭粉末と導電性付与
剤の分散性を高めて圧縮力やせん断力を向上させること
ができるので、ＥＳＲ特性および静電容量に優れた分極
性電極を得ることができる。Thus, the dispersibility of the activated carbon powder and the conductivity-imparting agent can be increased to improve the compressive force and the shear force, so that a polarizable electrode having excellent ESR characteristics and capacitance can be obtained. .
【００５０】以下、実施の形態２の具体的な実施例につ
いて説明する。Hereinafter, a specific example of the second embodiment will be described.
【００５１】（実施例８）まず、分極性電極は平均粒径
５μｍの石油コークス系活性炭粉末（表面官能基量：
０．４ｍｅｑ／ｇ）と導電性付与剤として平均粒径０．
０５μｍのカーボンブラック、ポリテトラフルオロエチ
レン（以下、ＰＴＦＥと略す）を分散した水溶性バイン
ダー溶液（ＰＴＦＥ濃度：６０％）を１０：２：１の重
量比に混合して混練機で十分に混練した後、水の分散溶
媒を少しずつ加えてさらに混練して所定の粘度を有した
ペーストを作製し、その後、このペーストを成型機にて
成形して１００℃の大気中で１時間乾燥して成型体を得
た。Example 8 First, a polarizable electrode was made of petroleum coke-based activated carbon powder having an average particle size of 5 μm (surface functional group content:
0.4 meq / g) and an average particle size of 0.
A water-soluble binder solution (PTFE concentration: 60%) in which 05 μm of carbon black and polytetrafluoroethylene (hereinafter abbreviated as PTFE) was dispersed was mixed at a weight ratio of 10: 2: 1 and kneaded sufficiently with a kneader. Thereafter, a dispersion solvent of water is added little by little, and the mixture is further kneaded to produce a paste having a predetermined viscosity. Thereafter, the paste is molded by a molding machine and dried in the air at 100 ° C. for 1 hour to mold. I got a body.
【００５２】この成型体を寸法１００ｍｍの円板状に切
断して２枚１組の分極性電極を得た。The molded body was cut into a disk having a size of 100 mm to obtain a pair of polarizable electrodes.
【００５３】次に、この２枚の分極性電極と厚さ５０μ
ｍで１１０ｍｍの円板状のセパレータに、プロピレンカ
ーボネートに４エチルアンモニウム４フッ化ホウ素を溶
解した電解液を含浸した。Next, the two polarizable electrodes and a 50 μm thick electrode were used.
An electrolytic solution obtained by dissolving 4-ethylammonium boron tetrafluoride in propylene carbonate was impregnated in a disk-shaped separator having a diameter of 110 mm.
【００５４】次に、この一対の分極性電極がその間にセ
パレータを介在して対面するようにし、続いて、ステン
レス容器の下底部と上蓋部に導電層を介して分極性電極
が接するように配置して、その周縁部を絶縁性のリング
パッキンにより密閉してボタン型の電気二重層キャパシ
タを得た。Next, the pair of polarizable electrodes face each other with a separator interposed therebetween, and then the polarizable electrodes are arranged so as to be in contact with the lower bottom and upper lid of the stainless steel container via a conductive layer. Then, the periphery was sealed with an insulating ring packing to obtain a button-type electric double layer capacitor.
【００５５】（実施例９）上記実施例８において、導電
性付与剤として平均粒径０．０１μｍのカーボンブラッ
クを用いた以外は実施例８と同様にしてボタン型の電気
二重層キャパシタを得た。Example 9 A button-type electric double layer capacitor was obtained in the same manner as in Example 8 except that carbon black having an average particle size of 0.01 μm was used as the conductivity-imparting agent. .
【００５６】（実施例１０）上記実施例８において、導
電性付与剤として平均粒径０．００１μｍのカーボンブ
ラックを用いた以外は実施例８と同様にしてボタン型の
電気二重層キャパシタを得た。Example 10 A button-type electric double layer capacitor was obtained in the same manner as in Example 8 except that carbon black having an average particle size of 0.001 μm was used as the conductivity-imparting agent. .
【００５７】（実施例１１）上記実施例８において、導
電性付与剤として平均粒径０．１μｍのカーボンブラッ
クを用いた以外は実施例８と同様にしてボタン型の電気
二重層キャパシタを得た。Example 11 A button-type electric double layer capacitor was obtained in the same manner as in Example 8 except that carbon black having an average particle diameter of 0.1 μm was used as the conductivity-imparting agent. .
【００５８】（比較例２）上記実施例８において、活性
炭素層の形成を平均粒径５μｍの石油コークス系活性炭
粉末（表面官能基量：０．５ｍｅｑ／ｇ）と導電性付与
剤として平均粒径０．０５μｍのカーボンブラック、Ｐ
ＴＦＥを分散した水溶性バインダー溶液（ＰＴＦＥ濃
度：６０％）を１０：２：２の重量比に混合して混練機
で混練して所定の粘度を有したペーストを作製し、その
後このペーストを成形して、空気中１００℃で１時間乾
燥して成形品を得た以外は実施例８と同様にしてボタン
型の電気二重層キャパシタを得た。Comparative Example 2 In Example 8, the activated carbon layer was formed by a petroleum coke-based activated carbon powder having an average particle size of 5 μm (surface functional group content: 0.5 meq / g) and an average particle size as a conductivity-imparting agent. 0.05μm diameter carbon black, P
A water-soluble binder solution (PTFE concentration: 60%) in which TFE is dispersed is mixed at a weight ratio of 10: 2: 2 and kneaded with a kneader to produce a paste having a predetermined viscosity, and then the paste is formed. Then, a button-type electric double layer capacitor was obtained in the same manner as in Example 8 except that a molded product was obtained by drying in air at 100 ° C. for 1 hour.
【００５９】これら実施例８〜１１および比較例２のボ
タン型の電気二重層キャパシタを、２．５Ｖ定電圧で１
時間充電して、次いで、１００ｍＡ定電流で放電した時
の静電容量（Ｃ）およびＥＳＲ特性を測定した。さら
に、ボタン型の電気二重層キャパシタは、７５℃恒温槽
中で２．８Ｖ定電圧で充電された状態で、３０００時間
保持した後、１００ｍＡ定電流で放電し、同様にして静
電容量（Ｃ）とＥＳＲ特性を測定した。その結果を（表
２）に示す。The button-type electric double-layer capacitors of Examples 8 to 11 and Comparative Example 2 were tested at a constant voltage of 2.5 V for 1
After the battery was charged for 100 hours and then discharged at a constant current of 100 mA, the capacitance (C) and the ESR characteristics were measured. Further, the button-type electric double layer capacitor was charged at a constant voltage of 2.8 V in a constant temperature bath at 75 ° C., held for 3000 hours, discharged at a constant current of 100 mA, and similarly discharged with a capacitance (C ) And ESR characteristics were measured. The results are shown in (Table 2).
【００６０】[0060]
【表２】 [Table 2]
【００６１】（表２）中のΔＣとΔＥＳＲとは、初期の
静電容量（Ｃ）とＥＳＲ特性の値に対して、上記条件下
での３０００時間後の静電容量（Ｃ）とＥＳＲ特性の値
の変化率をそれぞれ示している。ΔC and ΔESR in Table 2 are the capacitance (C) and ESR characteristics after 3000 hours under the above conditions with respect to the initial capacitance (C) and ESR characteristics. Are shown respectively.
【００６２】なお、試験個数は各５０個であり、静電容
量、ＥＳＲ特性はその平均値で示してある。The number of test pieces is 50 each, and the capacitance and ESR characteristics are shown by their average values.
【００６３】（表２）から明らかなように、実施例８〜
１０のボタン型の電気二重層キャパシタは、比較例２の
ボタン型の電気二重層キャパシタに比べても、やはり、
初期のＥＳＲ特性が低く、また３０００時間後のΔＣ、
ΔＥＳＲの変化が少ないことが理解される。これも、実
施の形態１の巻回型の電気二重層キャパシタと同様の効
果が得られるためである。As is clear from (Table 2), Examples 8 to
The button-type electric double-layer capacitor of No. 10 is also compared with the button-type electric double-layer capacitor of Comparative Example 2,
Initial ESR characteristics are low, and ΔC after 3000 hours,
It is understood that the change in ΔESR is small. This is also because the same effect as the wound electric double layer capacitor of the first embodiment can be obtained.
【００６４】また、実施例１１のボタン型の電気二重層
キャパシタは、導電性付与剤として平均粒径０．１μｍ
のカーボンブラックを用いたものであり、導電性付与剤
の平均粒径が活性炭粉末の平均粒径の１／１０を越える
と、活性炭粉末と導電性付与剤の分散性が悪くなり初期
特性および３０００時間後のΔＣ、ΔＥＳＲも悪くな
る。The button-type electric double layer capacitor of Example 11 had an average particle diameter of 0.1 μm as a conductivity-imparting agent.
When the average particle size of the conductivity-imparting agent exceeds 1/10 of the average particle size of the activated carbon powder, the dispersibility of the activated carbon powder and the conductivity-imparting agent becomes poor, and the initial characteristics and 3000 ΔC and ΔESR after time also become worse.
【００６５】なお、実施例８〜１１のボタン型の電気二
重層キャパシタは、液漏れは１個もなく、比較例２は液
漏れが４個あった。The button-type electric double layer capacitors of Examples 8 to 11 had no liquid leakage, and Comparative Example 2 had four liquid leakages.
【００６６】[0066]
【発明の効果】以上のように本発明は、活性炭粉末と活
性炭粉末よりも小さい粒径の導電性付与剤と樹脂を溶解
または分散したバインダー溶液を少量添加して混練する
工程と、さらに分散溶媒を少しずつ添加して所定の粘度
まで混練してペーストにする工程と、このペーストを集
電金属箔に塗布して分散溶媒を除去する工程またはペー
ストを成形して分散溶媒を除去する工程とからなる製造
方法とすることにより、活性炭粉末と導電性付与剤の分
散性を高めて圧縮力やせん断力を向上させることができ
るので、ＥＳＲが低くて容量の高い分極性電極を集電金
属箔に形成することができる。また、この分極性電極を
用いた電気二重層キャパシタは、ＥＳＲが小さく高容量
の電気二重層キャパシタを得ることができるものであ
る。As described above, the present invention comprises a step of adding a small amount of an activated carbon powder and a binder solution obtained by dissolving or dispersing a resin having a particle diameter smaller than that of the activated carbon powder and a resin; From the step of adding the paste little by little and kneading to a predetermined viscosity to form a paste, and the step of applying the paste to a current collecting metal foil to remove the dispersion solvent or the step of forming the paste and removing the dispersion solvent. The manufacturing method can increase the dispersibility of the activated carbon powder and the conductivity-imparting agent to improve the compressive force and the shearing force. Therefore, a polarizable electrode having a low ESR and a high capacity can be used as a current collecting metal foil. Can be formed. An electric double layer capacitor using this polarizable electrode can obtain a high capacity electric double layer capacitor with a small ESR.
【図１】（ａ）本発明の実施の形態１による巻回型の電
気二重層キャパシタの模式的な部分切欠き斜視図 （ｂ）同実施の形態１による電気二重層キャパシタの分
極性電極の要部拡大断面図FIG. 1 (a) is a schematic partial cutaway perspective view of a wound electric double layer capacitor according to a first embodiment of the present invention. (B) Polarizable electrodes of the electric double layer capacitor according to the first embodiment. Main part enlarged sectional view
【図２】本発明の実施の形態２によるボタン型の電気二
重層キャパシタの構成を示す部分切欠き斜視図FIG. 2 is a partially cutaway perspective view showing a configuration of a button-type electric double layer capacitor according to a second embodiment of the present invention.
【図３】従来の巻回型の電気二重層キャパシタの模式的
な部分切欠き斜視図FIG. 3 is a schematic partial cutaway perspective view of a conventional wound-type electric double layer capacitor.
１ 集電金属箔 ２ 活性炭素層 ３、１１ａ、１１ｂ 分極性電極 ４、１２ セパレータ ５、６ 外部引き出しリード線 ７ コンデンサ素子 ８ 封口材 ９ アルミニウムケース １３ａ、１３ｂ カーボン導電層 １４ リングパッキン １５ 下底部 １６ 上蓋部 DESCRIPTION OF SYMBOLS 1 Current-collecting metal foil 2 Activated carbon layer 3, 11a, 11b Polarized electrode 4, 12 Separator 5, 6 External lead wire 7 Capacitor element 8 Sealing material 9 Aluminum case 13a, 13b Carbon conductive layer 14 Ring packing 15 Lower bottom 16 Top lid
Claims (6)
さい粒径の導電性付与剤と、樹脂を溶解または分散した
少量の水溶性バインダー溶液を混練する工程と、さらに
この混練品に分散溶媒を少しずつ添加して所定の粘度ま
で混練してペーストにする工程と、このペーストを集電
金属箔に塗布して分散溶媒を除去する工程とからなる電
気二重層キャパシタ用分極性電極の製造方法。1. A step of kneading an activated carbon powder, a conductivity-imparting agent having a particle size smaller than the activated carbon powder, and a small amount of a water-soluble binder solution in which a resin is dissolved or dispersed, and further adding a dispersion solvent to the kneaded product. A method for producing a polarizable electrode for an electric double layer capacitor, comprising: a step of adding a little by little and kneading to a predetermined viscosity to form a paste; and a step of applying the paste to a current collecting metal foil to remove a dispersion solvent.
さい粒径の導電性付与剤と、樹脂を溶解または分散した
少量の水溶性バインダー溶液を混練する工程と、さらに
この混練品に分散溶媒を少しずつ添加して所定の粘度ま
で混練してペーストにする工程と、このペーストを成形
して分散溶媒を除去する工程とからなる電気二重層キャ
パシタ用分極性電極の製造方法。2. A step of kneading an activated carbon powder, a conductivity-imparting agent having a particle size smaller than that of the activated carbon powder, and a small amount of a water-soluble binder solution in which a resin is dissolved or dispersed, and further adding a dispersion solvent to the kneaded product. A method for producing a polarizable electrode for an electric double layer capacitor, comprising a step of adding a little by little and kneading to a predetermined viscosity to form a paste, and a step of forming the paste to remove a dispersion solvent.
平均粒径の１／１０以下とした請求項１または２に記載
の電気二重層キャパシタ用分極性電極の製造方法。3. The method for producing a polarizable electrode for an electric double layer capacitor according to claim 1, wherein the average particle size of the conductivity-imparting agent is 1/10 or less of the average particle size of the activated carbon powder.
し、その表面官能基量を０．１〜１．０ｍｅｑ／ｇの範
囲とした請求項１または２に記載の電気二重層キャパシ
タ用分極性電極の製造方法。4. The polarizable electrode for an electric double layer capacitor according to claim 1, wherein the activated carbon powder is petroleum coke-based activated carbon and the surface functional group content is in the range of 0.1 to 1.0 meq / g. Production method.
い粒径の導電性付与剤と樹脂を溶解または分散した少量
の水溶性バインダー溶液を混練し、さらにこの混練品に
分散溶液を少しずつ添加して所定の粘度まで混練したペ
ーストを集電金属箔に塗布し分散溶媒を除去して構成し
た分極性電極をセパレータを介して巻回してコンデンサ
素子とし、このコンデンサ素子に電解液を含浸したもの
をアルミニウムケースに封入してなる電気二重層キャパ
シタ。5. Kneading activated carbon powder, a conductivity-imparting agent having a particle size smaller than the activated carbon powder, and a small amount of a water-soluble binder solution obtained by dissolving or dispersing a resin, and further adding a dispersion solution little by little to the kneaded product. A paste kneaded to a predetermined viscosity is applied to a current-collecting metal foil, and a dispersing solvent is removed. A polarizable electrode is wound through a separator to form a capacitor element. The capacitor element is impregnated with an electrolyte. An electric double layer capacitor sealed in an aluminum case.
い粒径の導電性付与剤と樹脂を溶解または分散した少量
の水溶性バインダー溶液を混練し、この混練品に分散溶
媒を少しずつ添加して所定の粘度まで混練したペースト
を成形して分散溶媒を除去して構成した分極性電極をセ
パレータを介して電解液とともに下底部と上蓋部内に封
入した電気二重層キャパシタ。6. Kneading an activated carbon powder, a conductivity-imparting agent having a particle size smaller than the activated carbon powder, and a small amount of a water-soluble binder solution in which a resin is dissolved or dispersed, and adding a dispersion solvent little by little to the kneaded product. An electric double layer capacitor in which a polarizable electrode formed by forming a paste kneaded to a predetermined viscosity and removing a dispersion solvent is sealed in a lower bottom portion and an upper lid portion together with an electrolytic solution via a separator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001018160A JP2002222741A (en) | 2001-01-26 | 2001-01-26 | Method of manufacturing polarizable electrode for electric double layer capacitor and electric double layer capacitor using the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001018160A JP2002222741A (en) | 2001-01-26 | 2001-01-26 | Method of manufacturing polarizable electrode for electric double layer capacitor and electric double layer capacitor using the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002222741A true JP2002222741A (en) | 2002-08-09 |
Family
ID=18884218
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001018160A Pending JP2002222741A (en) | 2001-01-26 | 2001-01-26 | Method of manufacturing polarizable electrode for electric double layer capacitor and electric double layer capacitor using the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002222741A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006085925A (en) * | 2004-09-14 | 2006-03-30 | Denso Corp | Electrode for lithium secondary battery and lithium secondary battery using this electrode |
| EP1657730A2 (en) | 2004-11-15 | 2006-05-17 | Mitsubishi Gas Chemical Company, Inc. | Electrode sheet and electric double layer capacitor using the same |
| JP2007180413A (en) * | 2005-12-28 | 2007-07-12 | Jsr Corp | Electrochemical capacitor |
| US7948738B2 (en) | 2005-04-08 | 2011-05-24 | Panasonic Corporation | Electrode material for electric double layer capacitor and process for producing the same, electrode for electric double layer capacitor, and electric double layer capacitor |
-
2001
- 2001-01-26 JP JP2001018160A patent/JP2002222741A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006085925A (en) * | 2004-09-14 | 2006-03-30 | Denso Corp | Electrode for lithium secondary battery and lithium secondary battery using this electrode |
| EP1657730A2 (en) | 2004-11-15 | 2006-05-17 | Mitsubishi Gas Chemical Company, Inc. | Electrode sheet and electric double layer capacitor using the same |
| US7948738B2 (en) | 2005-04-08 | 2011-05-24 | Panasonic Corporation | Electrode material for electric double layer capacitor and process for producing the same, electrode for electric double layer capacitor, and electric double layer capacitor |
| JP2007180413A (en) * | 2005-12-28 | 2007-07-12 | Jsr Corp | Electrochemical capacitor |
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