JP2716334B2 - Electric double layer capacitor - Google Patents
Electric double layer capacitorInfo
- Publication number
- JP2716334B2 JP2716334B2 JP5000159A JP15993A JP2716334B2 JP 2716334 B2 JP2716334 B2 JP 2716334B2 JP 5000159 A JP5000159 A JP 5000159A JP 15993 A JP15993 A JP 15993A JP 2716334 B2 JP2716334 B2 JP 2716334B2
- Authority
- JP
- Japan
- Prior art keywords
- electric double
- double layer
- layer capacitor
- polarizable electrode
- activated carbon
- 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.)
- Expired - Fee Related
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
Description
【０００１】[0001]
【産業上の利用分野】本発明は電気二重層コンデンサに
関し、特に固体活性炭を分極性電極として用いた電気二
重層コンデンサに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric double layer capacitor, and more particularly to an electric double layer capacitor using solid activated carbon as a polarizable electrode.
【０００２】[0002]
【従来の技術】図４および図５に示すように、電気二重
層コンデンサの分極性電極１６は平板や円盤状の固体活
性炭であり、この固体活性炭は特願平３−８１２６２に
示される活性炭／炭素複合材料等が用いられる。集電体
７には電解液が水溶液系の場合にはカーボンや導電性ゴ
ム，導電プラスチック等がまた非水溶液系の場合には金
属箔などが使用され、固体活性炭と電気的に接続してい
る。ガスケット８はプラスチックやゴムからなり、集電
体７と接着剤で接着されている。セパレータ９は多孔性
フィルムまたはガラス繊維製の抄造体で、一対の分極性
電極１６間を電気的に絶縁している。2. Description of the Related Art As shown in FIGS. 4 and 5, a polarizable electrode 16 of an electric double layer capacitor is a flat or disk-shaped solid activated carbon. A carbon composite material or the like is used. When the electrolytic solution is an aqueous solution, carbon, conductive rubber, conductive plastic, or the like is used for the current collector 7, and when the electrolytic solution is a non-aqueous solution, a metal foil or the like is used, and is electrically connected to the solid activated carbon. . The gasket 8 is made of plastic or rubber, and is bonded to the current collector 7 with an adhesive. The separator 9 is a porous film or a glass fiber papermaking body, and electrically insulates between the pair of polarizable electrodes 16.
【０００３】電気二重層コンデンサの耐電圧は電解液の
電気分解電圧であるため、基本セル１０を電気的に直列
接続することで所用の耐電圧を実現している。図４は水
溶液系電解液を使用した電気二重層コンデンサを示して
いるが、耐電圧０．９Ｖの基本セル１０を６つ直列接続
しており、耐電圧は５．５Ｖである。上述の電気二重層
コンデンサへの電解液注入は、ガスソケット８側面にあ
けられた注入孔１５より電解液を注入することで行い、
注入孔１５は電解液注入後、溶融し電解液の封止を行
う。Since the withstand voltage of the electric double layer capacitor is the electrolysis voltage of the electrolytic solution, the required withstand voltage is realized by electrically connecting the basic cells 10 in series. FIG. 4 shows an electric double-layer capacitor using an aqueous electrolytic solution. Six basic cells 10 with a withstand voltage of 0.9 V are connected in series, and the withstand voltage is 5.5 V. The above-described electrolyte injection into the electric double layer capacitor is performed by injecting the electrolyte through an injection hole 15 formed in a side surface of the gas socket 8.
After the injection of the electrolyte, the injection hole 15 is melted to seal the electrolyte.
【０００４】ところで、上述の分極性電極１６には数μ
ｍの孔が無数にあいており、この孔を通して内部へ電解
液が入る。しかし、この細孔に電解液を完全に注入する
ことは非常に困難である。従来、特開平１−１５２７１
５に示される、活性炭をバインダで固形化して分極性電
極としたコイン状の電気二重層コンデンサにおいて、図
６に示すように、分極性電極１７表面に傷１８を設ける
ことで電解液の含浸性を高める方法があるが、この方法
では傷１８のある表面付近だけで分極性電極１７全体の
含浸性は上がらないという欠点を有する。The above-mentioned polarizable electrode 16 has several μm.
There are countless holes of m, and the electrolyte enters inside through these holes. However, it is very difficult to completely inject the electrolyte into these pores. Conventionally, Japanese Unexamined Patent Publication No.
In the coin-shaped electric double-layer capacitor shown in FIG. 5 in which activated carbon was solidified with a binder and used as a polarizable electrode, as shown in FIG. However, this method has a disadvantage that the impregnating property of the entire polarizable electrode 17 does not increase only near the surface where the scratch 18 exists.
【０００５】[0005]
【発明が解決しようとする課題】この従来の分極性電極
では内部まで完全に電解液を含浸できない。また、表面
に傷をつけた場合でも表面付近だけで全体の含浸性の向
上は望めない。その結果、分極性電極内部に窒素や酸素
などのガスが残ってしまう。この残留ガスは、温度変化
や充放電などにより分極性電極外部へ出てくるため、基
本セル内の内圧が上昇し、電解液の漏液や基本セルの破
損等が発生するという問題点がある。With this conventional polarizable electrode, it is impossible to completely impregnate the inside with the electrolyte. Further, even when the surface is scratched, improvement of the entire impregnation property cannot be expected only near the surface. As a result, gases such as nitrogen and oxygen remain inside the polarizable electrode. Since this residual gas comes out of the polarizable electrode due to a temperature change or charge / discharge, there is a problem that the internal pressure in the basic cell increases, causing leakage of the electrolytic solution, damage to the basic cell, and the like. .
【０００６】本発明の目的は、基本セル内の内圧の上昇
による電解液の漏液や破損等の発生がなく、信頼性の高
い電気二重層コンデンサを提供することにある。It is an object of the present invention to provide a highly reliable electric double layer capacitor which does not cause electrolyte leakage or breakage due to an increase in internal pressure in a basic cell.
【０００７】[0007]
【課題を解決するための手段】本発明は、固体活性炭を
分極性電極として用い、前記分極性電極に電解液を注入
することにより得られる電気二重層コンデンサにおい
て、前記固体活性炭に少くとも１ｍｍの径を有する貫通
孔を静電容量の減少が１０％以下になるように形成する
か、または前記固体活性炭に高配向黒鉛粉末と黒鉛ウイ
スカのうちのいずれか一方を重量比で１％以上１０％未
満添加したものである。According to the present invention, there is provided an electric double layer capacitor obtained by using a solid activated carbon as a polarizable electrode and injecting an electrolytic solution into the polarizable electrode. Either a through hole having a diameter is formed so that a decrease in capacitance is 10% or less, or one of a highly oriented graphite powder and a graphite whisker is added to the solid activated carbon in a weight ratio of 1% to 10%. Less than that added.
【０００８】[0008]
【実施例】次に、本発明の実施例について図面を参照し
て説明する。Next, embodiments of the present invention will be described with reference to the drawings.
【０００９】図１は本発明の第１の実施例の構成を示す
断面図、図２は図１の分極性電極の平面図である。第１
の実施例の構造は、分極性電極１以外は図４に示す従来
の電気二重層コンデンサの構造と同じである。第１の実
施例の分極性電極１は、図２に示すように、９つの貫通
孔４を有する。FIG. 1 is a sectional view showing the structure of a first embodiment of the present invention, and FIG. 2 is a plan view of the polarizable electrode of FIG. First
The structure of this embodiment is the same as the structure of the conventional electric double layer capacitor shown in FIG. The polarizable electrode 1 of the first embodiment has nine through holes 4 as shown in FIG.
【００１０】この分極性電極１の製造方法は次の通りで
ある。まず、粉末活性炭と粉末状フェノール樹脂とを重
量比で６０／４０に混合する。混合にはボールミルを使
用し乾式混合したのち造粒した。この混合粉を９つのコ
アピン（直径２ｍｍ）を有する金型で射出成型した。成
形品は７０×５０×４ｍｍの大きさでコアピンの部分が
貫通孔４になる。この成形品を非酸化性雰囲気中におい
て９００℃で熱処理した。熱処理時間は２時間，昇温速
度は５０℃／ｈである。分極性電極の収縮率は５％で等
方的に収縮するため、貫通孔の直径は１．９ｍｍとな
り、９つの貫通孔４を有する分極性電極１が得られる。The method of manufacturing the polarizable electrode 1 is as follows. First, powdered activated carbon and a powdery phenol resin are mixed at a weight ratio of 60/40. The mixture was dry mixed using a ball mill and then granulated. This mixed powder was injection-molded in a mold having nine core pins (diameter 2 mm). The molded product has a size of 70 × 50 × 4 mm and the portion of the core pin becomes the through hole 4. This molded article was heat-treated at 900 ° C. in a non-oxidizing atmosphere. The heat treatment time is 2 hours, and the heating rate is 50 ° C./h. Since the contraction rate of the polarizable electrode is isotropically contracted at 5%, the diameter of the through hole becomes 1.9 mm, and the polarizable electrode 1 having nine through holes 4 is obtained.
【００１１】このように直径１．９ｍｍの９つの貫通孔
４を分極性電極１に形成することにより、静電容量の減
少が１０％以下におさえられ、また貫通孔４を点対称の
位置に設けることにより、熱処理時に等方的に収縮させ
含浸性を向上させることができる。By forming the nine through holes 4 having a diameter of 1.9 mm in the polarizable electrode 1 as described above, the reduction of the capacitance is suppressed to 10% or less, and the through holes 4 are positioned at point-symmetric positions. By providing, it is possible to improve the impregnation property by causing isotropic shrinkage during heat treatment.
【００１２】図３は本発明の第２の実施例の分極性電極
の平面図である。第２の実施例の構造は、分極性電極以
外は図１に示す第１の実施例の構造と同じである。第２
の実施例の分極性電極２は、図３に示すように、黒鉛粉
末５を含有する。FIG. 3 is a plan view of a polarizable electrode according to a second embodiment of the present invention. The structure of the second embodiment is the same as the structure of the first embodiment shown in FIG. 1 except for the polarizable electrodes. Second
As shown in FIG. 3, the polarizable electrode 2 of Example 1 contains a graphite powder 5.
【００１３】この分極性電極２の製造方法は、次の通り
である。まず、粉末活性炭と粉末状フェノール樹脂、お
よび黒鉛粉末５とを重量比で５５／４０／５に混合す
る。使用した黒鉛粉末５はＸ線回折の結果から炭素網平
面の層間距離が３．３８オングストロームであった。混
合にはボールミルを使用し乾式混合した後、造粒した。
この混合粉を射出成形により、７０×５０×４ｍｍの大
きさに成形し、非酸化性雰囲気中において９００℃で熱
処理した。熱処理時間は２時間で、昇温速度は５０℃／
ｈである。重量減少率は、活性炭１０％，樹脂６５％，
黒鉛１％以下であるため、熱処理後の混合比は重量比で
４９．５／２６／５となり、黒鉛粉末５が６．２％含有
の分極性電極２が得られる。The method for manufacturing the polarizable electrode 2 is as follows. First, powdered activated carbon, powdery phenol resin, and graphite powder 5 are mixed at a weight ratio of 55/40/5. As a result of X-ray diffraction, the graphite powder 5 used had an interlayer distance of 3.38 angstroms on the carbon net plane. The mixture was dry mixed using a ball mill and then granulated.
This mixed powder was formed into a size of 70 × 50 × 4 mm by injection molding and heat-treated at 900 ° C. in a non-oxidizing atmosphere. The heat treatment time is 2 hours, and the heating rate is 50 ° C /
h. Weight loss rate is 10% activated carbon, 65% resin,
Since the graphite content is 1% or less, the mixing ratio after the heat treatment is 49.5 / 26/5 by weight, and the polarizable electrode 2 containing 6.2% of the graphite powder 5 is obtained.
【００１４】高配向の黒鉛は硫酸イオンをはじめいろい
ろなイオンをインターカレーションできるので、この性
質を利用し固体活性炭に黒鉛粉末または黒鉛ウイスカを
添加することで電解液の含浸を容易にする。黒鉛粉末５
の添加量を重量比で１％以上１０％未満とすることによ
り、図２に示す第１の実施例の分極性電極１の貫通孔４
と同様静電容量の低下を１０％以下におさえることがで
きる。Since highly oriented graphite can intercalate various ions including sulfate ions, the impregnation of the electrolyte is facilitated by adding graphite powder or graphite whisker to solid activated carbon utilizing this property. Graphite powder 5
The weight ratio of 1% or more to less than 10% makes the through hole 4 of the polarizable electrode 1 of the first embodiment shown in FIG.
In the same manner as described above, the decrease in capacitance can be suppressed to 10% or less.
【００１５】分極性電極１，２をそれぞれ用いた第１お
よび第２の実施例の電気二重層コンデンサを試作した。
試作方法はどの分極性電極を用いても同じであるため、
分極性電極１を用いた第１の実施例を例にとり説明す
る。まず、分極性電極１と集電体７を圧着する。集電体
７には導電性ゴムを使用した。積層体１１の両側に配置
される集電体７に関しては片面だけに分極性電極１を圧
着し、残りは集電体７の両側に分極性電極１を圧着す
る。これをエポキシ接着剤を用いてＡＢＳ製のガスケッ
ト８と接着する。このときガラス繊維抄造体のセパレー
タ９を図１に示すように配置する。このようにして集電
体７を共通にする６つの基本セル１０からなる積層体１
１を得る。次に、端子板１２，絶縁シート１３を配置
し、両側より加圧板１４をボルトで固定することにより
積層体１１を加圧する。次に２つある注入孔１５の一方
から真空ポンプで排気し、もう一方より電解液である硫
酸を注入する。注入の時間は２，４，８，１２，２４時
間とした。注入後、注入孔１５を溶融して封止を行い、
分極性電極１を用いた第１の実施例の電気二重層コンデ
ンサを得た。同様にして第２の実施例の電気二重層コン
デンサを得た。比較用として、分極性電極１６および分
極性電極１７を用いた従来例１および従来例２の電気二
重層コンデンサをそれぞれ試作した。The electric double layer capacitors of the first and second embodiments using the polarizable electrodes 1 and 2, respectively, were prototyped.
Since the prototype method is the same with any polarizable electrode,
The first embodiment using the polarizing electrode 1 will be described as an example. First, the polarizable electrode 1 and the current collector 7 are pressed. Conductive rubber was used for the current collector 7. With respect to the current collectors 7 arranged on both sides of the stacked body 11, the polarizable electrode 1 is crimped on only one side, and the rest of the current collectors 7 are crimped on both sides of the current collector 7. This is adhered to an ABS gasket 8 using an epoxy adhesive. At this time, the separator 9 of the glass fiber papermaking body is arranged as shown in FIG. In this way, the stacked body 1 including the six basic cells 10 sharing the current collector 7
Get 1. Next, the terminal body 12 and the insulating sheet 13 are arranged, and the laminated body 11 is pressed by fixing the pressing plate 14 with bolts from both sides. Next, the gas is exhausted from one of the two injection holes 15 by a vacuum pump, and sulfuric acid as an electrolyte is injected from the other. The injection time was 2, 4, 8, 12, 24 hours. After the injection, the injection hole 15 is melted and sealed,
The electric double layer capacitor of the first embodiment using the polarizing electrode 1 was obtained. Similarly, an electric double layer capacitor of the second embodiment was obtained. For comparison, electric double layer capacitors of Conventional Example 1 and Conventional Example 2 using the polarizable electrode 16 and the polarizable electrode 17 were prototyped, respectively.
【００１６】従来例１の分極性電極１６の製造方法は次
の通りである。まず、粉末活性炭と粉末状フェノール樹
脂とを重量比で６０／４０に混合する。混合にはボール
ミルを使用し乾式混合したのち造粒し、射出成形した。
成形品は７０×５０×４ｍｍの大きさである。この成形
品を非酸化性雰囲気中において９００℃で熱処理した。
熱処理時間は２時間、昇温速度は５０℃／ｈである。The method for manufacturing the polarizable electrode 16 of the first conventional example is as follows. First, powdered activated carbon and a powdery phenol resin are mixed at a weight ratio of 60/40. The mixture was dry-mixed using a ball mill, granulated, and injection-molded.
The molded article has a size of 70 × 50 × 4 mm. This molded article was heat-treated at 900 ° C. in a non-oxidizing atmosphere.
The heat treatment time is 2 hours, and the heating rate is 50 ° C./h.
【００１７】従来例２の分極性電極１７は、分極性電極
１６の表面に研磨紙で傷１８をつけることにより得た。
研磨紙には粒度１８０番のものを使用し、湿式で３分行
った。分極性電極１６，１７をそれぞれ用いた電気二重
層コンデンサの試作方法は分極性電極１を用いて試作し
た方法と同じである。The polarizable electrode 17 of Conventional Example 2 was obtained by scratching the surface of the polarizable electrode 16 with abrasive paper.
Abrasive paper having a particle size of 180 was used for 3 minutes in a wet system. The trial production method of the electric double layer capacitor using the polarizing electrodes 16 and 17 is the same as the trial production method using the polarizable electrode 1.
【００１８】以上試作した第１，第２の実施例の電気二
重層コンデンサおよび従来例１，２の電気二重層コンデ
ンサについて、初期特性おおよび高温負荷試験を行っ
た。試験方法は次の通りである。試験１では、７０℃で
２４０時間５．５Ｖ印加した後、外観をチェックした。
試験２では電解液の注入時間が２４時間のものを使用
し、７０℃で５．５Ｖを１，０００時間印加した後、外
観および等価直列抵抗（ＥＳＲ），静電容量を評価し
た。等価直列抵抗は、交流４端子法で１ｋＨｚのインピ
ーダンスを測定し、その時の実数部とする。また静電容
量Ｃは、室温で２４時間短絡したのち、１２時間５Ｖで
充電し、電流１００ｍＡで放電させて、３Ｖから２．５
Ｖに電圧降下ΔＶするのに要する時間Δｔから算出す
る。計算式は、 Ｃ＝Ｉ×Δｔ／ΔＶ＝０．１×Δｔ／０．５ である。The electric double layer capacitors of the first and second embodiments and the electric double layer capacitors of Conventional Examples 1 and 2 produced as described above were subjected to initial characteristics and high-temperature load tests. The test method is as follows. In Test 1, the appearance was checked after applying 5.5 V at 70 ° C. for 240 hours.
In Test 2, an electrolyte solution with an injection time of 24 hours was used. After applying 5.5 V for 1,000 hours at 70 ° C., the appearance, equivalent series resistance (ESR), and capacitance were evaluated. The equivalent series resistance is obtained by measuring an impedance of 1 kHz by an AC four-terminal method and obtaining a real part at that time. The capacitance C is short-circuited at room temperature for 24 hours, charged at 5 V for 12 hours, discharged at a current of 100 mA, and changed from 3 V to 2.5 V.
It is calculated from the time Δt required for the voltage drop ΔV to V. The calculation formula is: C = I × Δt / ΔV = 0.1 × Δt / 0.5
【００１９】表１，２はその試験結果を示したものであ
り、表１は電解液注入時間と液漏れの有無，表２は評価
結果である。表１より、電解液の液漏れと電解液の注入
方法，時間との間に関係のあることがわかる。また、本
実施例の電気二重層コンデンサは従来例より電解液の注
入時間を短くできることがわかる。液漏れは、一部注入
孔１５から、多くはガスケット８とガスケット８との接
着面からわずかにしみだす程度ではあったが発生してい
た。表２より２４時間電解液注入を行った本実施例の電
気二重層コンデンサは、外観、特性とも問題なく、電解
液の含浸性を向上させ、高い信頼性を得ることができ
る。Tables 1 and 2 show the test results, Table 1 shows the electrolyte injection time and the presence or absence of leakage, and Table 2 shows the evaluation results. It can be seen from Table 1 that there is a relationship between the leakage of the electrolyte and the method and time for injecting the electrolyte. Further, it can be seen that the electric double layer capacitor of the present embodiment can shorten the injection time of the electrolytic solution as compared with the conventional example. The liquid leak occurred from the injection hole 15 partially, but mostly from the adhesive surface between the gasket 8 and the gasket 8. According to Table 2, the electric double layer capacitor of this example in which the electrolyte was injected for 24 hours has no problem in appearance and characteristics, improves the impregnation of the electrolyte, and can obtain high reliability.
【００２０】[0020]
【表１】 外観；○問題なし、△液のしみだし、×液漏れ[Table 1] Appearance; ○ no problem, △ liquid seeping, × liquid leak
【００２１】[0021]
【表２】 単位；ＥＳＲ／ｍΩ、静電容量／Ｆ 外観；○問題なし、×液漏れ[Table 2] Unit: ESR / mΩ, capacitance / F Appearance: ○ No problem, × liquid leakage
【００２２】[0022]
【発明の効果】以上説明したように本発明により電気二
重層コンデンサは、分極性電極に１つ以上の貫通孔を設
けたため、または高配向の黒鉛粉末または黒鉛ウイスカ
を添加したために電解液の含浸性が向上し、高い信頼性
が得られるという効果がある。As described above, according to the present invention, the electric double layer capacitor is impregnated with the electrolytic solution because one or more through holes are provided in the polarizable electrode or because highly oriented graphite powder or graphite whisker is added. The effect is that the reliability is improved and high reliability is obtained.
【図１】本発明の第１の実施例の構成を示す断面図であ
る。FIG. 1 is a sectional view showing a configuration of a first exemplary embodiment of the present invention.
【図２】図１の分極性電極の平面図である。FIG. 2 is a plan view of the polarizable electrode of FIG.
【図３】本発明の第２の実施例の分極性電極の平面図で
ある。FIG. 3 is a plan view of a polarizable electrode according to a second embodiment of the present invention.
【図４】従来の電気二重層コンデンサの一例の構成を示
す断面図である。FIG. 4 is a cross-sectional view illustrating a configuration of an example of a conventional electric double layer capacitor.
【図５】従来の電気二重層コンデンサの分極性電極の一
例の平面図である。FIG. 5 is a plan view of an example of a polarizable electrode of a conventional electric double layer capacitor.
【図６】従来の電気二重層コンデンサの分極性電極の他
の例の平面図である。FIG. 6 is a plan view of another example of the polarizable electrode of the conventional electric double layer capacitor.
１，２，３，１６，１７ 分極性電極 ４ 貫通孔 ５ 黒鉛粉末 ７ 集電体 ８ ガスケット ９ セパレータ １０ 基本セル １１ 積層体 １２ 端子板 １３ 絶縁シート １４ 加圧板 １５ 注入孔 １８ 傷 1, 2, 3, 16, 17-minute polar electrode 4 Through hole 5 Graphite powder 7 Current collector 8 Gasket 9 Separator 10 Basic cell 11 Stack 12 Terminal plate 13 Insulating sheet 14 Pressing plate 15 Injection hole 18 Scratches
───────────────────────────────────────────────────── フロントページの続き (72)発明者 田渕 順次 東京都港区芝五丁目７番１号日本電気株 式会社内 (72)発明者 吉備 ゆかり 東京都港区芝五丁目７番１号日本電気株 式会社内 (56)参考文献 特開 平４−288361（ＪＰ，Ａ) 特開 平２−281608（ＪＰ，Ａ) 特開 平３−116708（ＪＰ，Ａ) 特開 平３−201519（ＪＰ，Ａ) 実開 平１−133725（ＪＰ，Ｕ) ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Tabuchi sequentially 7-1, Shiba 5-chome, Minato-ku, Tokyo Inside NEC Corporation (72) Yukari Kibi 5-7-1, Shiba 5-chome, Minato-ku, Tokyo Japan (56) References JP-A-4-288361 (JP, A) JP-A-2-281608 (JP, A) JP-A-3-116708 (JP, A) JP-A-3-201519 ( JP, A) Hikaru 1-133725 (JP, U)
Claims (2)
記分極性電極に電解液を注入することにより得られる電
気二重層コンデンサにおいて、前記固体活性炭に少くと
も１ｍｍの径を有する貫通孔を静電容量の減少が１０％
以下になるように、かつ前記分極性電極の全域にわたっ
て形成したことを特徴とする電気二重層コンデンサ。1. A solid activated carbon used as the polarizable electrodes, before
In the electric double layer capacitor obtained by injecting the electrolytic solution into the polarizable electrode, a through hole having a diameter of at least 1 mm is formed in the solid activated carbon so that the capacitance is reduced by 10%.
An electric double layer capacitor formed as described below and over the entire area of the polarizable electrode.
記分極性電極に電解液を注入することにより得られる電
気二重層コンデンサにおいて、前記固体活性炭に高配向
黒鉛粉末と黒鉛ウイスカのうちのいずれか一方を重量比
で１％以上１０％未満添加したことを特徴とする電気二
重層コンデンサ。Wherein the solid activated carbon used as the polarizable electrodes, before
In an electric double layer capacitor obtained by injecting an electrolyte into the polarizable electrode, one of a highly oriented graphite powder and a graphite whisker is added to the solid activated carbon in a weight ratio of 1% to 10%. % Electric double layer capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5000159A JP2716334B2 (en) | 1993-01-05 | 1993-01-05 | Electric double layer capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5000159A JP2716334B2 (en) | 1993-01-05 | 1993-01-05 | Electric double layer capacitor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06244059A JPH06244059A (en) | 1994-09-02 |
| JP2716334B2 true JP2716334B2 (en) | 1998-02-18 |
Family
ID=11466265
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5000159A Expired - Fee Related JP2716334B2 (en) | 1993-01-05 | 1993-01-05 | Electric double layer capacitor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2716334B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005013299A1 (en) * | 2003-07-07 | 2005-02-10 | Eamex Corporation | Capacitor and method for manufacturing same |
| JP4978467B2 (en) * | 2005-05-26 | 2012-07-18 | 日本ゼオン株式会社 | Electrochemical element electrode material and composite particles |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01133725U (en) * | 1988-03-08 | 1989-09-12 | ||
| JPH02281608A (en) * | 1989-04-21 | 1990-11-19 | Nec Corp | Electrical double layer capacitor |
| JPH03116708A (en) * | 1989-09-28 | 1991-05-17 | Isuzu Motors Ltd | Electric double-layer capacitor |
| JPH0791449B2 (en) * | 1990-03-23 | 1995-10-04 | 日本電気株式会社 | Activated carbon / polyacene material composite, its manufacturing method, electric double layer capacitor and its composite parts |
-
1993
- 1993-01-05 JP JP5000159A patent/JP2716334B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06244059A (en) | 1994-09-02 |
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