JPS61203614A

JPS61203614A - Electric doule-layer capacitor

Info

Publication number: JPS61203614A
Application number: JP60045423A
Authority: JP
Inventors: 誠藤原; 米田　一; 岡本　正史
Original assignee: Matsushita Electric Industrial Co Ltd
Current assignee: Panasonic Holdings Corp
Priority date: 1985-03-07
Filing date: 1985-03-07
Publication date: 1986-09-09
Anticipated expiration: 2009-08-22
Also published as: JPH0665206B2

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【発明の詳細な説明】産業上の利用分野この発明は、活性炭を分極性電極として用いる電気二重
層コンデンサに関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to an electric double layer capacitor using activated carbon as a polarizable electrode.

従来の技術従来、この種の電解液を利用した電気二重層コンデンサ
の電極性は、活性炭粒子をプレス成形したり、適当なバ
インダーと練合したものを集電体金属上に塗布して作ら
れていた。また、活性炭繊維を用いる場合には活性炭繊
維上にアルミニウムの溶射層を作り、ケース材料として
強度のあるステンレススチールからなる電極ケースとア
ルミニウムの溶射層をスポット溶接し電極を作る方法が
知られ、陽極、陰極とも同じ静電容量をもった電極が使
われていた。Conventional technology Conventionally, the polarity of electric double layer capacitors using this type of electrolyte was made by press-molding activated carbon particles or kneading them with a suitable binder and coating them on a metal current collector. was. In addition, when activated carbon fibers are used, a method is known in which an aluminum spray layer is formed on the activated carbon fibers, and the electrode is made by spot welding the electrode case made of strong stainless steel as the case material and the aluminum spray layer. Electrodes with the same capacitance were used for both the cathode and cathode.

発明が解決しようとする問題点このような電気二重層コンデンサにおいて、耐電圧でく
抄返し充放電すると、内部抵抗、静電容量変化の劣化が
みられた。Problems to be Solved by the Invention When such an electric double layer capacitor is repeatedly charged and discharged at a withstand voltage, deterioration in internal resistance and capacitance change is observed.

これは第３図のマー■特性が示すように、基準電圧０に
対して陽極側と陰極側の反応電位比率が異なっておし、
これに反応電流が流れず特性が安定して印加できる耐電
圧を印加すると、０電位を基準に陽極、陰極共同−容量
であるために同じ電位変化で昇圧するので、陽極側にお
いて反応電流の流れる電位をこえて特性が劣化してしま
う。This is because the reaction potential ratios on the anode side and the cathode side are different with respect to the reference voltage of 0, as shown by the MAR characteristics in Figure 3.
When a withstand voltage is applied to this with which no reaction current flows and the characteristics are stable, the voltage increases with the same potential change since the anode and cathode have joint capacitance with respect to 0 potential, so the reaction current flows on the anode side. If the voltage exceeds the potential, the characteristics will deteriorate.

このように、実際に使える電位中は陽極の反応電位の２
倍の戸位巾で低く、ｖ−１特性から得られた耐電圧を有
効に使えていない。In this way, the potential that can actually be used is 2 times the reaction potential of the anode.
The door width is twice as high, so the withstand voltage obtained from the V-1 characteristic cannot be used effectively.

本発明はこのような欠点を解決し、反応電流を規制して
耐電圧を向上させるものである。The present invention solves these drawbacks and improves the withstand voltage by regulating the reaction current.

問題点を解決するための手段そして、上記問題点を解決する本発明の技術的手段は、
ｖ−ｒ特性において基準電圧０に対して、陽極側と陰極
側の反応電位比率の逆数の比に陽極、陰極の分極性電極
の静電容量を合わせたものである。Means for solving the problems and the technical means of the present invention for solving the above problems are:
In the v-r characteristic, the capacitance of the polarizable electrodes of the anode and cathode is combined with the ratio of the reciprocal of the reaction potential ratio of the anode side and the cathode side with respect to a reference voltage of 0.

作用この技術的手段による作用は次のようになる。action The effect of this technical means is as follows.

第２図に示すようにｖ−Ｌ特性での耐電圧を有効に使う
為に陽極側及び陰極側の反応電位と、電圧印加した時の
陽極と陰極の電位が同一になるようにすれば、反応電流
が流れずにｖ−１特性から得られた耐電圧が使える。As shown in Figure 2, in order to effectively use the withstand voltage in the v-L characteristic, if the reaction potentials on the anode and cathode sides and the potentials on the anode and cathode when voltage is applied are made to be the same, The withstand voltage obtained from the v-1 characteristic can be used without a reaction current flowing.

すなわち、電圧印加時陽極、陰極の反応電位に達する時
間を同じになるよう、それぞれの電極の静電容量の値を
決めればよい。陽極側の静電容量を１とすると、陰極側
の静電容量は−となる。That is, the capacitance value of each electrode may be determined so that the time required to reach the reaction potential of the anode and cathode when voltage is applied is the same. When the capacitance on the anode side is 1, the capacitance on the cathode side is -.

ｉ施例第１図に示すように、フェノール系活性炭繊維製の布（
厚さ０．６Ｗ１１．比表面積２．ｏｏｏ７７２７ｇｒ　
　）からなる分極性電極４．５の表面に、導電電極３と
して厚さ２５０μｍのアルミニウム層をプラズマ溶射法
により形成する。この二層構造物を陽極及び陰極の静電
容量が１：０．６になる円板状の大きさに打抜き型で抜
き取り電極体を得る。この電極体にプロピレンカーボネ
ートにテトラエチルアンモニウムテトラフルオロｙ−ｖ
−）１０ｗｔ％を加えた電解液を含浸した後、間にセパ
レータ６を介在させて重ね合わせ、さらにこれを内面を
アルミニウム２（純度９９．８６％厚さ７０μＩ１１　
）で陽極となる側のみ被覆したステンレス製ケース１で
挾み、そして、そのケース１の開口端にバッキング７を
配置すると共に、かしめにより封口を行なう。i Example As shown in Figure 1, a cloth made of phenolic activated carbon fiber (
Thickness 0.6W11. Specific surface area 2. ooo7727gr
) An aluminum layer having a thickness of 250 μm is formed as a conductive electrode 3 on the surface of a polarizable electrode 4.5 formed by a plasma spraying method. This two-layer structure is cut out using a punching die into a disc-like size in which the capacitance of the anode and cathode is 1:0.6 to obtain an electrode body. This electrode body contains tetraethylammonium tetrafluoro y-v in propylene carbonate.
-) After being impregnated with an electrolytic solution containing 10 wt%, they are stacked with a separator 6 interposed between them, and the inner surface is coated with aluminum 2 (purity 99.86% thickness 70 μI 11
), and a backing 7 is placed on the open end of the case 1, and the opening is sealed by caulking.

第１表に、この発明による電気二重層コンデンサの諸特
性を示す。同じく第１表には比較のために陽極、陰極の
容量比率を１＝１のものについて試作したものの特性を
示す。Table 1 shows various characteristics of the electric double layer capacitor according to the present invention. Similarly, Table 1 shows the characteristics of a prototype in which the capacity ratio of the anode and cathode was 1=1 for comparison.

（以下余白）発明の効果以上のようにこの発明は、陽極、陰極の反応電位の比率
に応じて、各電極の容量をあわせることにより、反応電
流を規制でき、より高耐圧の電気二重層コンデンサを容
易に得ることができるものである。(Blank below) Effects of the Invention As described above, this invention can regulate the reaction current by matching the capacitance of each electrode according to the ratio of the reaction potentials of the anode and cathode, thereby creating an electric double layer capacitor with higher withstand voltage. can be easily obtained.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本発明の電気二重層コンデンサの一実施例を示
す断面図、第２図は陽極、陰極の容量比図は陽極、陰極
の容量比率が１：１のもののＶ　−Ｉ特性を示す特性図
である。１・・・・・・ケース、３・・・・・・導電電極、４・
・・・・・陽極型分極性電極、５・・・・・・陰極側分
極性電極、６・・・・・・セパレータ。Fig. 1 is a cross-sectional view showing one embodiment of the electric double layer capacitor of the present invention, and Fig. 2 is an anode/cathode capacity ratio diagram showing the V-I characteristics of an anode/cathode capacity ratio of 1:1. It is a characteristic diagram. 1... Case, 3... Conductive electrode, 4.
... Anode type polarizable electrode, 5 ... Cathode side polarizable electrode, 6 ... Separator.

Claims

【特許請求の範囲】[Claims]

活性炭繊維や活性炭粉末などよりなりかつ片面に導電電
極を形成した分極性電極を電解液を介して配置して素子
を構成し、この素子を２つで対をなす一対の金属ケース
内に収納し、その金属ケースそれぞれに分極性電極上の
導電電極を電気的に接触させることにより構成され、陽
極、陰極それぞれの分極性電極の静電容量を電位一電流
特性においてＯ電位を基準にして、陽極、陰極の反応電
位の比率の逆数の比に合わせたことを特徴とする電気二
重層コンデンサ。An element is constructed by arranging polarizable electrodes made of activated carbon fiber or activated carbon powder with a conductive electrode formed on one side via an electrolyte, and the elements are housed in a pair of metal cases. , is constructed by electrically contacting a conductive electrode on a polarizable electrode to each of the metal cases, and the capacitance of the anode and cathode polarizable electrodes is determined based on the O potential in the potential-current characteristic. , an electric double layer capacitor characterized in that the ratio is adjusted to the reciprocal of the ratio of the reaction potential of the cathode.