JPH1197295A - Electric double layer capacitor, its manufacture, electrode, and separator - Google Patents

Electric double layer capacitor, its manufacture, electrode, and separator

Info

Publication number
JPH1197295A
JPH1197295A JP9253541A JP25354197A JPH1197295A JP H1197295 A JPH1197295 A JP H1197295A JP 9253541 A JP9253541 A JP 9253541A JP 25354197 A JP25354197 A JP 25354197A JP H1197295 A JPH1197295 A JP H1197295A
Authority
JP
Japan
Prior art keywords
separator
double layer
electric double
layer capacitor
electrode
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
Application number
JP9253541A
Other languages
Japanese (ja)
Inventor
Hideki Shibuya
秀樹 渋谷
Toshikazu Takeda
敏和 竹田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Isuzu Advanced Engineering Center Ltd
Original Assignee
Isuzu Advanced Engineering Center Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Isuzu Advanced Engineering Center Ltd filed Critical Isuzu Advanced Engineering Center Ltd
Priority to JP9253541A priority Critical patent/JPH1197295A/en
Publication of JPH1197295A publication Critical patent/JPH1197295A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/52—Separators
    • 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

PROBLEM TO BE SOLVED: To reduce the thickness of a separator, and at the same time, to provide an electric double layer capacitor in which a plurality of electrodes can be formed integrally, an electrode, and a separator. SOLUTION: A separator for electric double layer capacitor is manufactured by curing PVDC(polyvinylidene chloride) resins 21 and 22 by heating. Electrodes 11 and 12 are united into one body with a cured separator. After organic solvents in which the PVDC resins 21 and 22 are respectively dissolved are successively applied to the surface of the electrode 11 and dried, the other electrode 12 is put on the resins 21 and 22 and the resins 21 and 22 are cured by heating the resins 21 and 22 within the temperature range of a room temperature to 180 deg.C.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は、電気二重層コンデ
ンサ及びその製造方法並びに電極、セパレータに関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric double layer capacitor, a method for manufacturing the same, an electrode, and a separator.

【０００２】[0002]

【従来の技術】電気二重層コンデンサは、活性炭の粉末
に電解液をしみこませ、活性炭と電解液の界面にできる
電気二重層の静電容量を利用したコンデンサである。耐
電圧、最高使用温度は、電解液の分解電圧・温度に依存
しており、定格電圧は数Ｖと低いが、ファラッドオーダ
の静電容量が容易に得られることから、電池の代わりに
半導体メモリ（Ｄ−ＲＡＭ）のバックアップ用等の低電
流密度の用途に多く用いられるようになっており、最近
では、もっと電流密度の高い用途、例えば車載鉛蓄電池
の代わり、にも使用することが研究されている。2. Description of the Related Art An electric double layer capacitor is a capacitor utilizing an electrostatic solution of an activated carbon powder and an electrolytic solution impregnated in an activated carbon powder. The withstand voltage and the maximum operating temperature depend on the decomposition voltage and temperature of the electrolytic solution, and the rated voltage is as low as several volts. However, since the Farad order capacitance can be easily obtained, the semiconductor memory is used instead of the battery. It has been widely used for low current density applications such as backup of (D-RAM), and has recently been studied for use in applications having higher current densities, for example, in place of in-vehicle lead-acid batteries. ing.

【０００３】この電気二重層コンデンサのセパレータと
して、従来、ガラス不織シートを用いていたが、厚みが
大きい（０．２ｍｍ）ことと含水率が大きいことから電
気二重層コンデンサのパッケージサイズや重量を大きく
する原因となっていた。Conventionally, a glass non-woven sheet has been used as a separator for the electric double layer capacitor. However, since the thickness is large (0.2 mm) and the water content is large, the package size and weight of the electric double layer capacitor are reduced. It was causing it to grow.

【０００４】[0004]

【発明が解決しようとする課題】本発明は、セパレータ
の厚みを薄くするとともに、複数の電極を一体形成する
ことを可能とした電気二重層コンデンサ、電極及びセパ
レータを提供するものである。SUMMARY OF THE INVENTION The present invention provides an electric double layer capacitor, an electrode, and a separator which can reduce the thickness of the separator and integrally form a plurality of electrodes.

【０００５】[0005]

【課題を解決するための手段】本発明は、ＰＶＤＣ樹脂
を加熱硬化した電気二重層コンデンサ用セパレータであ
る。SUMMARY OF THE INVENTION The present invention is a separator for an electric double layer capacitor obtained by heating and curing PVDC resin.

【０００６】また、本発明は、ＰＶＤＣ樹脂を加熱硬化
したセパレータで一体化された電気二重層コンデンサ用
電極である。Further, the present invention is an electrode for an electric double layer capacitor integrated by a separator obtained by heating and curing PVDC resin.

【０００７】そして、本発明は、電極とセパレータとを
具備する電気二重層コンデンサにおいて、前記セパレー
タは、ＰＶＤＣ樹脂を加熱硬化したものである電気二重
層コンデンサである。According to the present invention, there is provided an electric double layer capacitor comprising an electrode and a separator, wherein the separator is obtained by heating and curing PVDC resin.

【０００８】更に、本発明は、上記電極は、加熱硬化さ
れたセパレータで一体化されている電気二重層コンデン
サである。Further, the present invention is an electric double layer capacitor in which the electrodes are integrated with a heat-cured separator.

【０００９】また、本発明は、有機溶剤に溶解させたＰ
ＶＤＣ樹脂を電極上に塗布し乾燥し、その上に別の電極
をのせ、室温〜１８０℃の温度範囲内でＰＶＤＣ樹脂を
加熱硬化する電気二重層コンデンサの製造方法である。Further, the present invention provides a method for dissolving P dissolved in an organic solvent.
This is a method for manufacturing an electric double layer capacitor in which a VDC resin is applied on an electrode, dried, another electrode is placed thereon, and the PVDC resin is heated and cured within a temperature range of room temperature to 180 ° C.

【００１０】そして、本発明は、有機溶剤は、ジメチル
ホルムアミド、テトロヒドロフラン及びシクロヘキサノ
ンのうち、少なくとも１つを有する電気二重層コンデン
サの製造方法である。The present invention is a method for producing an electric double layer capacitor in which the organic solvent has at least one of dimethylformamide, tetrohydrofuran and cyclohexanone.

【００１１】更に、本発明は、有機溶剤は、珪酸を主と
する多孔質粉末を有する電気二重層コンデンサの製造方
法である。Further, the present invention is a method for manufacturing an electric double layer capacitor having a porous powder mainly composed of silicic acid as an organic solvent.

【００１２】[0012]

【発明の実施の形態】本発明の発明の実施の形態を説明
する。本発明の電気二重層コンデンサ及びその製造方法
並びに電極、セパレータについて説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described. The electric double layer capacitor of the present invention, a method for manufacturing the same, electrodes, and a separator will be described.

【００１３】本発明の電気二重層コンデンサの製造方法
の実施例について、図１を用いて説明する。活性炭粉末
等を焼結させた電気二重層コンデンサ用分極性電極１１
を用意する（図１ａ参照）。この電極１１上に、ＰＶＤ
Ｃ樹脂にアエロジルを１０ｗｔ％加え、更にジメチルホ
ルムアミドを添加して粘度を１０〜１００Ｐａ・ｓｅｃ
に調整しながら混練してＰＶＤＣ樹脂を溶解させたもの
を塗布し、９０℃で３０分乾燥させて、ＰＶＤＣ樹脂乾
燥膜２１を得る（図１ｂ参照）。次に、この電極１１の
ＰＶＤＣ樹脂乾燥膜２１に再び溶剤に溶解させたＰＶＤ
Ｃ樹脂２２を塗布する（図１ｃ参照）。その電極１１上
に別の電極１２をのせ、１０ｋｇの圧力で加圧しながら
１８０℃以下の温度で加圧してＰＶＤＣ樹脂２１、２２
を加熱硬化する（図１ｄ参照）。ＰＶＤＣ樹脂２１、２
２は、加熱処理により硬化してセパレータとなるととも
に、その際、接着剤として両側の電極１１、１２同士を
一体化することができる。このセパレータ部分の厚み
は、２０〜４０μｍであった。この一体化した電極の外
側にＰｔ板を配置して集電板とし、更にその外側からテ
フロン板で挾み込んで固定して、漏れ電流及び自己放電
による電圧降下率を測定した。An embodiment of a method for manufacturing an electric double layer capacitor according to the present invention will be described with reference to FIG. Polarizable electrode 11 for electric double layer capacitor obtained by sintering activated carbon powder or the like
Is prepared (see FIG. 1a). On this electrode 11, PVD
Aerosil is added to C resin at 10 wt%, and dimethylformamide is further added to increase the viscosity to 10 to 100 Pa · sec.
The mixture obtained by kneading and dissolving the PVDC resin while adjusting the temperature is applied and dried at 90 ° C. for 30 minutes to obtain a dried PVDC resin film 21 (see FIG. 1B). Next, the PVDC resin dry film 21 of the electrode 11
A C resin 22 is applied (see FIG. 1c). Another electrode 12 is placed on the electrode 11 and pressurized at a temperature of 180 ° C. or less while applying a pressure of 10 kg, and the PVDC resins 21 and 22 are pressed.
Is cured by heating (see FIG. 1d). PVDC resin 21, 2
2 can be cured by heat treatment to form a separator, and at this time, the electrodes 11 and 12 on both sides can be integrated as an adhesive. The thickness of this separator portion was 20 to 40 μm. A Pt plate was arranged outside the integrated electrode to form a current collecting plate, and the current collecting plate was sandwiched and fixed from the outside with a Teflon plate, and the leakage current and the voltage drop rate due to self-discharge were measured.

【００１４】比較例を説明する。活性炭粉末等を焼結し
た固形電極を３５ｗｔ％硫酸に浸漬し、減圧含浸を２４
時間行い、２００μｍ厚さのガラス不織繊維のセパレー
タを挾んで対向させ、更にその外側にＰｔ板を配置して
集電板とし、更にその外側からテフロン板で挾み込んで
固定して、実施例と同様に、漏れ電流及び自己放電によ
る電圧降下率を測定した。A comparative example will be described. A solid electrode obtained by sintering activated carbon powder or the like is immersed in 35 wt% sulfuric acid, and impregnated under reduced pressure for 24 hours.
After a while, a 200 μm thick glass non-woven fiber separator is sandwiched between the separators, facing each other, a Pt plate is further placed outside to form a current collecting plate, and further sandwiched and fixed with a Teflon plate from outside. As in the example, the leakage current and the voltage drop rate due to self-discharge were measured.

【００１５】測定方法を説明する。漏れ電流について
は、０．８Ｖまで１２５ｍＡで定電流充電を行い、３０
分間電圧を保った後の漏れ電流を測定した。自己放電に
よる電圧降下率については、０．８Ｖまで１２５ｍＡで
定電流充電を行い、３０分間電圧を保った後、充電回路
をオープンにして、１２時間放置後の初期電圧に対する
電圧の降下量を％で表した。測定結果を表１に示す。The measuring method will be described. Regarding the leakage current, constant current charging was performed at 125 mA to 0.8 V,
The leakage current after maintaining the voltage for one minute was measured. Regarding the voltage drop rate due to self-discharge, constant current charging was performed at 125 mA up to 0.8 V, the voltage was kept for 30 minutes, the charging circuit was opened, and the voltage drop relative to the initial voltage after leaving for 12 hours was% It was expressed by. Table 1 shows the measurement results.

【表１】 [Table 1]

【００１６】表１に示すように、実施例のセパレータ
は、漏れ電流及び電圧降下率ともに比較例のものより低
下していて、すぐれていることがわかる。これは、ＰＶ
ＤＣ樹脂はイオン透過性はあるものの炭化物粒子や不純
物粒子は透過しないため、厚さが薄くても漏れ電流が少
なく、そして、自己放電も少ないからである。As shown in Table 1, it can be seen that the separator of the embodiment is excellent in that both the leakage current and the voltage drop rate are lower than those of the comparative example. This is PV
This is because the DC resin has ion permeability but does not transmit carbide particles or impurity particles, so that even if the thickness is small, the leakage current is small and the self-discharge is small.

【００１７】一方、比較例で使用したガラス不織シート
は、細かい炭化物粒子や不純物粒子を透過するため、漏
れ電流が大きく、そして、自己放電による電圧降下率も
大きくなる。また、厚み（０．２ｍｍ）があり、そし
て、含水率が大きいことから電気二重層コンデンサのパ
ッケージサイズや重量を大きくする原因となっている
が、より信頼性を向上するためには、セパレータの厚み
をこれ（０．２ｍｍ）以下に薄くすることは困難であ
る。On the other hand, the glass non-woven sheet used in the comparative example has a large leakage current and a large voltage drop due to self-discharge because it transmits fine carbide particles and impurity particles. In addition, the thickness (0.2 mm) and the high water content cause an increase in the package size and weight of the electric double layer capacitor. It is difficult to reduce the thickness to less than (0.2 mm).

【００１８】なお、実施例で添加した多孔質の珪酸は、
親水性に優れているため、その中に電解液がしみ込んで
電解質のパスとなるため、添加するメリットはある。The porous silica added in the examples is
Since it is excellent in hydrophilicity, the electrolyte solution penetrates into it and forms a path for the electrolyte.

【００１９】添加物として、ジメチルホルムアミドを使
用する例を示したが、テトロヒドロフラン、シクロヘキ
サノン、あるいは、これらを複数混合して添加すること
もできる。Although an example in which dimethylformamide is used as an additive has been described, tetrohydrofuran, cyclohexanone, or a mixture of a plurality of these can also be added.

【００２０】ＰＶＤＣ樹脂の塗布回数としては、１回以
上であればよく、回数を多くすると作製されるセパレー
タの厚みを厚くすることも可能である。The number of times of application of the PVDC resin may be one or more, and if the number of times is increased, the thickness of the separator to be produced can be increased.

【００２１】[0021]

【発明の効果】本発明により、セパレータの厚みを薄く
することができるとともに、複数の電極を一体形成する
ことを可能とした電気二重層コンデンサ、電極及びセパ
レータを得ることができる。According to the present invention, it is possible to obtain an electric double layer capacitor, an electrode, and a separator which can reduce the thickness of the separator and can integrally form a plurality of electrodes.

【図面の簡単な説明】[Brief description of the drawings]

【図１】本発明の電気二重層コンデンサの製造方法の一
実施例の説明図。FIG. 1 is an explanatory diagram of one embodiment of a method for manufacturing an electric double layer capacitor of the present invention.

【符号の説明】[Explanation of symbols]

１１、１２ 電極 ２１、２２ ＰＶＤＣ樹脂 11,12 electrode 21,22 PVDC resin

Claims (7)

【特許請求の範囲】[Claims] 【請求項１】 ＰＶＤＣ樹脂を加熱硬化したことを特徴
とする電気二重層コンデンサ用セパレータ。1. A separator for an electric double layer capacitor, wherein a PVDC resin is cured by heating. 【請求項２】 ＰＶＤＣ樹脂を加熱硬化したセパレータ
で一体化されたことを特徴とする電気二重層コンデンサ
用電極。2. An electrode for an electric double layer capacitor, wherein a PVDC resin is integrated with a heat-cured separator. 【請求項３】 電極とセパレータとを具備する電気二重
層コンデンサにおいて、 前記セパレータは、ＰＶＤＣ樹脂を加熱硬化したもので
あることを特徴とする電気二重層コンデンサ。3. An electric double layer capacitor comprising an electrode and a separator, wherein the separator is obtained by heating and curing PVDC resin. 【請求項４】 請求項３記載の電気二重層コンデンサに
おいて、 上記電極は、加熱硬化されたセパレータで一体化されて
いることを特徴とする電気二重層コンデンサ。4. The electric double layer capacitor according to claim 3, wherein the electrodes are integrated by a heat-cured separator. 【請求項５】 有機溶剤に溶解させたＰＶＤＣ樹脂を電
極上に塗布し乾燥し、その上に別の電極をのせ、室温〜
１８０℃の温度範囲内でＰＶＤＣ樹脂を加熱硬化するこ
とを特徴とする電気二重層コンデンサの製造方法。5. A PVDC resin dissolved in an organic solvent is applied on an electrode and dried, and another electrode is placed thereon,
A method for manufacturing an electric double layer capacitor, comprising heating and curing a PVDC resin within a temperature range of 180 ° C. 【請求項６】 請求項５記載の電気二重層コンデンサの
製造方法において、 有機溶剤は、ジメチルホルムアミド、テトロヒドロフラ
ン及びシクロヘキサノンのうち、少なくとも１つを有す
ることを特徴とする電気二重層コンデンサの製造方法。6. The method for manufacturing an electric double layer capacitor according to claim 5, wherein the organic solvent has at least one of dimethylformamide, tetrohydrofuran, and cyclohexanone. Method. 【請求項７】 請求項５又は６に記載の電気二重層コン
デンサの製造方法において、 有機溶剤は、珪酸を主とする多孔質粉末を有することを
特徴とする電気二重層コンデンサの製造方法。7. The method for manufacturing an electric double layer capacitor according to claim 5, wherein the organic solvent has a porous powder mainly composed of silicic acid.
JP9253541A 1997-09-18 1997-09-18 Electric double layer capacitor, its manufacture, electrode, and separator Pending JPH1197295A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9253541A JPH1197295A (en) 1997-09-18 1997-09-18 Electric double layer capacitor, its manufacture, electrode, and separator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9253541A JPH1197295A (en) 1997-09-18 1997-09-18 Electric double layer capacitor, its manufacture, electrode, and separator

Publications (1)

Publication Number Publication Date
JPH1197295A true JPH1197295A (en) 1999-04-09

Family

ID=17252812

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9253541A Pending JPH1197295A (en) 1997-09-18 1997-09-18 Electric double layer capacitor, its manufacture, electrode, and separator

Country Status (1)

Country Link
JP (1) JPH1197295A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010192860A (en) * 2008-03-05 2010-09-02 Mitsubishi Paper Mills Ltd Separator-electrode unified charge-storage element for capacitor and capacitor using the same
US8027147B2 (en) * 2007-01-29 2011-09-27 Daramic Llc Ultracapacitor and method of manufacturing the same
JPWO2012002359A1 (en) * 2010-06-28 2013-08-22 株式会社村田製作所 Electric storage device and manufacturing method thereof
US8531818B2 (en) 2008-12-08 2013-09-10 Panasonic Corporation Electric double layer capacitor and method for manufacturing the same

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8027147B2 (en) * 2007-01-29 2011-09-27 Daramic Llc Ultracapacitor and method of manufacturing the same
US8784510B2 (en) 2007-01-29 2014-07-22 Daramic Llc Ultracapacitor and method of manufacturing the same
JP2010192860A (en) * 2008-03-05 2010-09-02 Mitsubishi Paper Mills Ltd Separator-electrode unified charge-storage element for capacitor and capacitor using the same
US8531818B2 (en) 2008-12-08 2013-09-10 Panasonic Corporation Electric double layer capacitor and method for manufacturing the same
JPWO2012002359A1 (en) * 2010-06-28 2013-08-22 株式会社村田製作所 Electric storage device and manufacturing method thereof

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