JPH0555085A - Electric double layer capacitor - Google Patents
Electric double layer capacitorInfo
- Publication number
- JPH0555085A JPH0555085A JP3218334A JP21833491A JPH0555085A JP H0555085 A JPH0555085 A JP H0555085A JP 3218334 A JP3218334 A JP 3218334A JP 21833491 A JP21833491 A JP 21833491A JP H0555085 A JPH0555085 A JP H0555085A
- Authority
- JP
- Japan
- Prior art keywords
- polarizable electrode
- double layer
- electric double
- layer capacitor
- electrolyte
- 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]
【産業上の利用分野】本発明は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 an electric double layer capacitor.
【０００２】[0002]
【従来の技術】この種の電気二重層キャパシタとして要
部断面が図２に示す構成のものがある。同図において、
電解質透過性で非電子伝導性のポリプロピレンからなる
セパレータ１を挟んで活性炭２とポリビニールピロイド
ンからなるバインダ３と電解質４とプロピレンカーボネ
ートからなる溶媒（図示せず）からなる分極性電極５を
設け、分極性電極５の表面に金属フィルムからなる集電
極６を設けた構成であった。この構成において、集電極
６に直流電圧を印加すると分極性電極５内の活性炭２と
電解液の界面に電気二重層ができて大容量の蓄電をする
ようになっていた。2. Description of the Related Art As an electric double layer capacitor of this type, there is a capacitor whose cross section is shown in FIG. In the figure,
A polarizable electrode 5 made of activated carbon 2, a binder 3 made of polyvinylpyroidon, an electrolyte 4, and a solvent (not shown) made of propylene carbonate is provided with a separator 1 made of polypropylene permeable to an electrolyte and not electronically conductive therebetween. The collector electrode 6 made of a metal film was provided on the surface of the polarizable electrode 5. In this structure, when a direct current voltage is applied to the collecting electrode 6, an electric double layer is formed at the interface between the activated carbon 2 in the polarizable electrode 5 and the electrolytic solution to store a large amount of electricity.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、上記の
ような構成ではバインダ３の自己形状保存能を補うため
に厚さ２０〜５０μｍの金属フィルムからなる集電極６
を用いるためエネルギー密度が６Ｊ／cm3と低いこと、
分極性電極５が活性炭２，バインダ３，電解質４との混
合物のために電解質が分極性電極の内部に浸透にくく１
２０Hzにおける内部インピーダンスが１Ωと高いという
問題があった。However, in the above-mentioned structure, the collector electrode 6 made of a metal film having a thickness of 20 to 50 μm is added to supplement the self-shape-preserving ability of the binder 3.
Has a low energy density of 6 J / cm 3 ,
Since the polarizable electrode 5 is a mixture of the activated carbon 2, the binder 3 and the electrolyte 4, the electrolyte hardly penetrates into the polarizable electrode.
There was a problem that the internal impedance at 20 Hz was as high as 1Ω.
【０００４】本発明は上記の問題を解消し、エネルギー
密度が高く、内部インピーダンスの低い電気二重層キャ
パシタの提供を目的とする。An object of the present invention is to solve the above problems and to provide an electric double layer capacitor having a high energy density and a low internal impedance.
【０００５】[0005]
【課題を解決するための手段】上記の目的を達成するた
めに本発明の電気二重層キャパシタは、電解質透過性で
非電子伝導性のセパレータの両面に活性炭とフッ素樹脂
からなる連通孔を有する多孔体と電解液とからなる分極
性電極を設け、その分極性電極の表面に集電極を設けた
構成とする。In order to achieve the above object, an electric double layer capacitor of the present invention has a porous structure having a communicating hole made of activated carbon and a fluororesin on both sides of an electrolyte permeable non-electroconductive separator. A polarizable electrode including a body and an electrolytic solution is provided, and a collecting electrode is provided on the surface of the polarizable electrode.
【０００６】[0006]
【作用】上記構成により、分極性電極の自己形状保存能
が高くなり、集電極の厚さを低減できるとともに電解質
が分極性電極の内部に浸透しやすくなる。With the above construction, the ability of the polarizable electrode to preserve the self-shape is enhanced, the thickness of the collector electrode can be reduced, and the electrolyte easily penetrates into the polarizable electrode.
【０００７】[0007]
【実施例】以下、本発明の実施例を添付図面にもとづい
て説明する。Embodiments of the present invention will be described below with reference to the accompanying drawings.
【０００８】図１において、７は電解質透過性で非電子
伝導性のガラス繊維布からなるセパレータである。８は
フェノール樹脂系の活性炭９とフッ素樹脂１０からなる
連通孔１１を有する多孔体１２と、テトラエチルアンモ
ニウムテトラフルオロボレートからなる電解質１３とか
らなる分極性電極である。溶媒はプロピレンカーボネー
トであり、その１リットル容積中に０．１モルの電解質
を溶解させてある。活性炭９とフッ素樹脂１０の比率は
重量比で１：９とした。In FIG. 1, 7 is a separator made of a glass fiber cloth which is electrolyte permeable and non-electroconductive. Reference numeral 8 is a polarizable electrode composed of a porous body 12 having a communicating hole 11 made of a phenol resin-based activated carbon 9 and a fluororesin 10 and an electrolyte 13 made of tetraethylammonium tetrafluoroborate. The solvent is propylene carbonate, and 0.1 mol of electrolyte is dissolved in 1 liter volume thereof. The weight ratio of activated carbon 9 to fluororesin 10 was 1: 9.
【０００９】分極性電極８の表面には厚さ１μｍのアル
ミニウムからなる集電極１４をプラズマ溶射法で設け
た。上記構成の電気二重層キャパシタによれば、分極性
電極８に活性炭９とフッ素樹脂１０からなる多孔体１２
を用いるので内部インピーダンスが低くなるとともに自
己形状保存能が高くなり、集電極１４の厚さは１μｍ程
度でもよいためにエネルギー密度が高くなった。A collector electrode 14 made of aluminum and having a thickness of 1 μm was provided on the surface of the polarizable electrode 8 by plasma spraying. According to the electric double layer capacitor having the above structure, the polarizable electrode 8 has the porous body 12 including the activated carbon 9 and the fluororesin 10.
Since the internal impedance is lowered, the ability to preserve the self-shape is increased, and the thickness of the collecting electrode 14 may be about 1 μm, so that the energy density is increased.
【００１０】本実施例と従来例のエネルギー密度と内部
インピーダンスの比較を（表１）に示す。Table 1 shows a comparison between the energy density and the internal impedance of this example and the conventional example.
【００１１】[0011]
【表１】 [Table 1]
【００１２】同表から明らかなように本実施例のエネル
ギー密度は従来例より３．３倍高く、内部インピーダン
スは１桁以上低い。As is apparent from the table, the energy density of this embodiment is 3.3 times higher than that of the conventional example, and the internal impedance is lower by one digit or more.
【００１３】なお、実施例においては活性炭としてフェ
ノール樹脂系の活性炭を用いたが、これに代えてチョッ
プ状カーボン繊維，ガラス状カーボン，グラファイト粉
末等を用いても同様の効果が得られる。また、電解質と
してテトラエチルアンモニウムテトラフルオロボレート
を用いたが、これに代えてテトラエチルアンモニウムパ
ークロレート等の電解質を用いても同様の効果が得られ
る。また、集電極としてアルミニウムを用いたが、これ
に代えてタンタル，チタン，酸化チタン，貴金属の酸化
物等を用いても同様の効果が得られる。また、セパレー
タとしてガラス繊維布を用いたが、これに代えてポリプ
ロピレン等の電解質透過性で非電子伝導性のセパレータ
を用いても同様の効果が得られる。Although phenolic resin-based activated carbon was used as the activated carbon in the examples, similar effects can be obtained by using chopped carbon fibers, glassy carbon, graphite powder or the like instead. Further, although tetraethylammonium tetrafluoroborate was used as the electrolyte, the same effect can be obtained by using an electrolyte such as tetraethylammonium perchlorate in place of this. Further, although aluminum is used as the collector electrode, the same effect can be obtained by using tantalum, titanium, titanium oxide, or an oxide of a noble metal instead of aluminum. Although the glass fiber cloth is used as the separator, the same effect can be obtained by using an electrolyte permeable non-electroconductive separator such as polypropylene instead of the glass fiber cloth.
【００１４】[0014]
【発明の効果】以上の説明から明らかなように、本発明
の電気二重層キャパシタによれば、活性炭とフッ素樹脂
からなる連通孔を有する多孔体と電解液からなる分極性
電極を用いるので自己形状保存能が高くなり集電極の厚
さを低減できるのでエネルギー密度が高くなるとともに
電解質が分極性電極の内部に浸透しやすくなるので内部
インピーダンスが低減できる。As is apparent from the above description, according to the electric double layer capacitor of the present invention, since the porous body having the communicating holes made of activated carbon and the fluororesin and the polarizable electrode made of the electrolytic solution are used, the self-shape is achieved. Since the storage capacity is increased and the thickness of the collecting electrode can be reduced, the energy density is increased and the electrolyte easily penetrates into the polarizable electrode, so that the internal impedance can be reduced.
【図１】本発明の一実施例における電気二重層キャパシ
タの要部断面図FIG. 1 is a sectional view of an essential part of an electric double layer capacitor according to an embodiment of the present invention.
【図２】従来の一実施例における電気二重層キャパシタ
の要部断面図FIG. 2 is a sectional view of an essential part of an electric double layer capacitor according to a conventional example.
７ セパレータ ８ 分極性電極 ９ 活性炭 １０ フッ素樹脂 １１ 連通孔 １２ 多孔体 １３ 電解質 １４ 集電極 7 Separator 8 Polarizing Electrode 9 Activated Carbon 10 Fluororesin 11 Communication Hole 12 Porous Body 13 Electrolyte 14 Collection Electrode
Claims (2)
の両面に活性炭とフッ素樹脂からなる連通孔を有する多
孔体と電解液とからなる分極性電極を設け、その分極性
電極の表面に集電極を設けた電気二重層キャパシタ。1. A polarizable electrode comprising a porous body having a communicating hole made of activated carbon and a fluororesin and an electrolytic solution is provided on both sides of an electrolyte permeable non-electron conductive separator, and the polarizable electrode is collected on the surface of the polarizable electrode. Electric double layer capacitor with electrodes.
布からなるセパレータの両面にフェノール樹脂系の活性
炭とフッ素樹脂からなる連通孔を有する多孔体とテトラ
エチルアンモニウムフルオロボレートとプロピレンカー
ボネートからなる電解液とからなる分極性電極を設け、
その分極性電極の表面にアルミニウムからなる集電極を
溶射法で設けた電気二重層キャパシタ。2. A porous body having a communicating hole made of a phenol resin-based activated carbon and a fluororesin, and an electrolysis made of tetraethylammonium fluoroborate and propylene carbonate on both sides of a separator made of a glass fiber cloth having electrolyte permeability and non-electron conductivity. A polarizable electrode consisting of liquid and
An electric double layer capacitor in which a collector electrode made of aluminum is provided on the surface of the polarizable electrode by a thermal spraying method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3218334A JPH0555085A (en) | 1991-08-29 | 1991-08-29 | Electric double layer capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3218334A JPH0555085A (en) | 1991-08-29 | 1991-08-29 | Electric double layer capacitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0555085A true JPH0555085A (en) | 1993-03-05 |
Family
ID=16718236
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3218334A Pending JPH0555085A (en) | 1991-08-29 | 1991-08-29 | Electric double layer capacitor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0555085A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11135379A (en) * | 1997-10-31 | 1999-05-21 | Junji Ito | Porous electrode and its manufacture |
| US6631074B2 (en) | 2000-05-12 | 2003-10-07 | Maxwell Technologies, Inc. | Electrochemical double layer capacitor having carbon powder electrodes |
| US7414825B2 (en) * | 2005-06-27 | 2008-08-19 | Sanyo Electric Co., Ltd. | Electrochemical device |
-
1991
- 1991-08-29 JP JP3218334A patent/JPH0555085A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11135379A (en) * | 1997-10-31 | 1999-05-21 | Junji Ito | Porous electrode and its manufacture |
| US6631074B2 (en) | 2000-05-12 | 2003-10-07 | Maxwell Technologies, Inc. | Electrochemical double layer capacitor having carbon powder electrodes |
| US7414825B2 (en) * | 2005-06-27 | 2008-08-19 | Sanyo Electric Co., Ltd. | Electrochemical device |
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