JPH0266917A - Electric double layer capacitor - Google Patents
Electric double layer capacitorInfo
- Publication number
- JPH0266917A JPH0266917A JP63219059A JP21905988A JPH0266917A JP H0266917 A JPH0266917 A JP H0266917A JP 63219059 A JP63219059 A JP 63219059A JP 21905988 A JP21905988 A JP 21905988A JP H0266917 A JPH0266917 A JP H0266917A
- Authority
- JP
- Japan
- Prior art keywords
- thickness
- separator
- double layer
- electric double
- 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
- 239000003990 capacitor Substances 0.000 title claims description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 15
- -1 polypropylene Polymers 0.000 claims abstract description 11
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000004745 nonwoven fabric Substances 0.000 claims abstract description 10
- 239000000835 fiber Substances 0.000 claims abstract description 8
- 229920000728 polyester Polymers 0.000 claims abstract description 7
- 229920001707 polybutylene terephthalate Polymers 0.000 claims abstract description 5
- 239000006229 carbon black Substances 0.000 claims abstract description 4
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 4
- 239000010439 graphite Substances 0.000 claims abstract description 4
- 229920000139 polyethylene terephthalate Polymers 0.000 claims description 3
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 abstract description 13
- 239000002184 metal Substances 0.000 abstract description 13
- 239000004744 fabric Substances 0.000 abstract description 7
- 229910052782 aluminium Inorganic materials 0.000 abstract description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 6
- 239000003792 electrolyte Substances 0.000 abstract description 6
- 239000004743 Polypropylene Substances 0.000 abstract description 5
- 229920001155 polypropylene Polymers 0.000 abstract description 5
- RUOJZAUFBMNUDX-UHFFFAOYSA-N propylene carbonate Chemical compound CC1COC(=O)O1 RUOJZAUFBMNUDX-UHFFFAOYSA-N 0.000 abstract description 2
- 239000011347 resin Substances 0.000 abstract description 2
- 229920005989 resin Polymers 0.000 abstract description 2
- 230000032683 aging Effects 0.000 abstract 1
- 238000010285 flame spraying Methods 0.000 abstract 1
- 238000000465 moulding Methods 0.000 abstract 1
- 229940032159 propylene carbonate Drugs 0.000 abstract 1
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 239000008151 electrolyte solution Substances 0.000 description 3
- 240000000907 Musa textilis Species 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000007750 plasma spraying Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 230000003679 aging effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
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
【発明の詳細な説明】 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。[Detailed description of the invention] Industrial applications The present invention relates to an electric double layer capacitor.
従来の技術
この電気二重層キャパシタは分極性電極と電解質（液）
との界面で形成される電気二重層を利用した静電容量の
大きい特性を有するもので、主に、揮発性半導体メモリ
ー（例えば、ＲＡＭ・・・・・・ランダムアクセスメモ
リー）の停電時バックアップ用として使用されている。Conventional technology This electric double layer capacitor uses polarizable electrodes and an electrolyte (liquid).
It has a large capacitance characteristic that utilizes the electric double layer formed at the interface with the It is used as.
この種の従来のキャパシタは、第１図の様に円盤型（コ
イン型、ボタン型）と称される構造で、黒鉛、活性炭、
カーボンブラック及び若干のバインダ等からなる材料を
成型したり、アルミニウムやステンレスのネットに担持
させた電極又はカーボン繊維、特に活性炭繊維布からな
る炭素電極１゜２の間に電解液を含浸させたセパレータ
３を介在させ、集電体と外装材を兼ねた金属ケース６、
金属ふた５及び絶縁と封口材を兼ねたパツキン４によっ
て密閉されている。更に、活性炭繊維布からなる電極の
場合には、集電性を上げるために、金属ケース及び金属
ふたと接触する面上にはプラズマ溶射などによってアル
ミニウム層が形成されている。This type of conventional capacitor has a structure called a disk type (coin type, button type) as shown in Figure 1, and has a structure that is made of graphite, activated carbon,
An electrode made of a material made of carbon black and some binder, or supported on an aluminum or stainless steel net, or a separator made of carbon fiber, especially activated carbon fiber cloth, impregnated with an electrolytic solution between two carbon electrodes. 3, a metal case 6 that serves as a current collector and an exterior material;
It is sealed by a metal lid 5 and a gasket 4 that serves as an insulator and a sealing material. Furthermore, in the case of an electrode made of activated carbon fiber cloth, an aluminum layer is formed by plasma spraying or the like on the surface that contacts the metal case and metal lid in order to improve current collection.
発明が解決しようとする課題
この様な構成の電気二重層キャパシタの場合、対向する
二枚の電極、その間のセパレータ及び電解液からなる内
部素子は、集電体を兼ねた金属ふた、ケースによって適
度に圧縮されている。その理由は圧縮が弱ければ内部抵
抗が大きく、また不安定となり、逆に圧縮が強ければ電
極の一部がセパレータを貫通し易くなり漏れ電流大の原
因となる０
ところで、従来よりセパレータとして使用されている電
解紙と呼ばれるマニラ麻などからなる天然繊維抄紙は僅
かな圧縮でも電解液を保持することができるが、元来水
分を含んでいるため、これを使用した製品の経時特性は
不安定である。これに対して、ポリプロピレン繊維から
なる不織布は電解液の保持性に欠ける（圧縮を強くする
と所期の特性が得られる）が水分が極小なため、経時特
性が安定しているという特長があった。Problems to be Solved by the Invention In the case of an electric double layer capacitor having such a configuration, the internal element consisting of two electrodes facing each other, a separator between them, and an electrolytic solution is properly separated by a metal lid that also serves as a current collector and a case. is compressed into. The reason for this is that if the compression is weak, the internal resistance will be large and it will become unstable, while if the compression is strong, a part of the electrode will easily penetrate the separator, causing a large leakage current. Natural fiber paper made from Manila hemp, called electrolytic paper, can retain electrolyte even with slight compression, but because it inherently contains water, the aging properties of products made using it are unstable. . On the other hand, nonwoven fabrics made of polypropylene fibers lack the ability to retain electrolyte (the desired properties can be achieved by applying strong compression), but because they contain minimal moisture, they have stable properties over time. .
しかしながら、何れも欠点を持っているため、両者を満
足させる方法として、ポリプロピレン不織布に界面活性
剤を塗布するなどによって解決されていた。However, since both have drawbacks, a solution to the problem has been to apply a surfactant to a polypropylene nonwoven fabric as a method to satisfy both.
本発明は初期特性および経時特性を安定なものとするこ
とを目的とする。The object of the present invention is to stabilize initial characteristics and characteristics over time.
課題を解決するための手段
本発明はこのような問題点を解決するためのものであり
、黒鉛、カーボンブラック、活性炭などからなる炭素電
極間にポリエステル繊維不織布よりなるセパレータを介
在させて素子を構成したものである。Means for Solving the Problems The present invention is intended to solve these problems, and an element is constructed by interposing a separator made of polyester fiber nonwoven fabric between carbon electrodes made of graphite, carbon black, activated carbon, etc. This is what I did.
作用
このような本発明の構成によれば、炭素電極間にポリエ
ステル繊維不織布よりなるセパレータを用いているため
、電解液保持性が向上し、また低水分であるため、電気
二重層キャパシタの電気的安定性が初期的にも経時的に
も大きく向上する。Effects According to the structure of the present invention, since a separator made of polyester fiber nonwoven fabric is used between the carbon electrodes, the electrolyte retention property is improved, and since the water content is low, the electrical performance of the electric double layer capacitor is improved. Stability is greatly improved both initially and over time.
実施例 次に、本発明の実施例について述べる。Example Next, examples of the present invention will be described.
まず、活性炭繊維布として、厚み０．６問、目付１２５
ｇ ／ｍ”、表面積２０００ ｍ”／ ｇを有するも
のをφ６の大きさにして、さらに外形φ１１の金属ケー
ス、これに対応する金属ふた、パツキンを準備し、それ
ぞれをφ１ｏのセパレータ、及び電解液を含浸後、密閉
して製品化した。製品の外形はφ１１、厚みは１．７朋
である。First, as an activated carbon fiber cloth, the thickness is 0.6 and the basis weight is 125.
g/m" and a surface area of 2000 m"/g to a size of φ6, and further prepare a metal case with an outer diameter of φ11, a corresponding metal lid, and packing, and each with a φ1o separator and an electrolyte. After impregnation, the product was sealed and manufactured. The outer diameter of the product is φ11 and the thickness is 1.7 mm.
ここで、分極性電極としての活性炭繊維布の片面には０
．０５ ｒｍ程度のアルミニウム層がプラズマ溶射によ
って形成されている０電位的にマイナスとする金属ふた
は５ＵＳ３０４を、プラスとする金属ケースの内面はア
ルミニウムを使用し、外面は５ＵＳ３ ｏ ４で両者は
クラツド化され一体となっている。封口体はポリプロピ
レン樹脂成型品である。Here, one side of the activated carbon fiber cloth as a polarizable electrode has 0
．． An aluminum layer of about 0.05 rm is formed by plasma spraying.The metal lid with negative potential is made of 5US304, the inner surface of the metal case with positive potential is made of aluminum, and the outer surface is made of 5US3 o 4, both of which are clad. and become one. The sealing body is a polypropylene resin molded product.
電解液は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ボレート１ｍｏｌからなり、これ
を３０μｍ使用している。The electrolytic solution consists of 1 mol of tetraethylammonium tetrafluoroborate in propylene carbonate, and is used in a thickness of 30 μm.
ところで、この製品（単セル）は３ｖの耐電圧を持って
いるが、半導体メモリーの駆動電圧に対処するために二
枚積層し、６．５ｖ定格とした。By the way, this product (single cell) has a withstand voltage of 3V, but in order to cope with the driving voltage of semiconductor memory, two layers were laminated to make it rated at 6.5V.
ここで従来品１のセパレータはマニラ麻繊維７０チ＋ガ
ラス繊維３０チの混抄電解紙（目付３ｅｇ／ｒｒｔ’、
厚み０．０７ｍｍ）である。従来品２のセパレータはポ
リプロピレン不織布（目付ｓｏ ｇ／、、ｆ。Here, the separator of Conventional Product 1 is a mixed electrolytic paper of 70 inches of Manila hemp fiber + 30 inches of glass fiber (fabric weight 3eg/rrt',
The thickness is 0.07 mm). The separator of Conventional Product 2 is a polypropylene nonwoven fabric (fabric weight so g/, f.
厚み０．３６間）である。The thickness is 0.36 mm).
本発明品１のセパレータはＰＢＴ（ポリブチレンテレフ
タレート）からなるポリエステル不織布で目付３０ ｇ
／ ｒｒ？、厚み０．３６順のものである。The separator of Invention Product 1 is a polyester nonwoven fabric made of PBT (polybutylene terephthalate) and has a basis weight of 30 g.
/rr? , in order of thickness 0.36.
本発明品２のセパレータはＰＥＴ （ポリエチレンテレ
フタレート）からなるポリエステル不織布で目付３０
ｇ ／ ｍ”、厚み０．３５ｍ１１１のものである。The separator of the invention product 2 is a polyester nonwoven fabric made of PET (polyethylene terephthalate) with a basis weight of 30.
g/m” and a thickness of 0.35 m111.
表は従来品と本発明品の初期特性及び７０℃で６．６ｖ
印加してテストした３０００時間後の特性の比較である
。The table shows the initial characteristics of the conventional product and the inventive product, and 6.6V at 70°C.
This is a comparison of characteristics after 3000 hours of application and testing.
（以下余白）
発明の効果
以上のように本発明によれば、従来品と比較して、初期
的にも、経時的にも、そのバラツキ及び変化が少なく安
定しておシ、より長時間の寿命を有する電気二重層キヤ
パシタが提供できることになり、その工業的価値は大な
るものである。(Hereinafter, blank space) Effects of the Invention As described above, the present invention provides a stable product with less variation and change both initially and over time, and can be used for a longer period of time than conventional products. This means that an electric double layer capacitor with a long life can be provided, and its industrial value is great.
第１図は電気二重層キャパシタの断面図である。
１．２・・・・・・炭素電極、３・・・・・・セパレー
タ、４・・・・・・パツキン、５・・・・・・金属ふた
、６・・・・・・金属ケース。FIG. 1 is a sectional view of an electric double layer capacitor. 1.2... Carbon electrode, 3... Separator, 4... Gasket, 5... Metal lid, 6... Metal case.
Claims (2)
素電極間に、ポリエステル繊維不織布よりなるセパレー
タを介在させて素子を構成した電気二重層キャパシタ。(1) An electric double layer capacitor in which an element is constructed by interposing a separator made of polyester fiber nonwoven fabric between carbon electrodes made of graphite, carbon black, activated carbon, etc.
レフタレートからなる不織布である請求項１記載の電気
二重層キャパシタ。(2) The electric double layer capacitor according to claim 1, which is a nonwoven fabric made of polybutylene terephthalate or polyethylene terephthalate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63219059A JPH0266917A (en) | 1988-09-01 | 1988-09-01 | Electric double layer capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63219059A JPH0266917A (en) | 1988-09-01 | 1988-09-01 | Electric double layer capacitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0266917A true JPH0266917A (en) | 1990-03-07 |
Family
ID=16729624
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63219059A Pending JPH0266917A (en) | 1988-09-01 | 1988-09-01 | Electric double layer capacitor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0266917A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04151816A (en) * | 1990-10-15 | 1992-05-25 | Nec Corp | Electric double layer capacitor |
| JPH04162411A (en) * | 1990-10-24 | 1992-06-05 | Nec Corp | Electric double layer capacitor |
| US5621607A (en) * | 1994-10-07 | 1997-04-15 | Maxwell Laboratories, Inc. | High performance double layer capacitors including aluminum carbon composite electrodes |
| US5862035A (en) * | 1994-10-07 | 1999-01-19 | Maxwell Energy Products, Inc. | Multi-electrode double layer capacitor having single electrolyte seal and aluminum-impregnated carbon cloth electrodes |
| US6233135B1 (en) | 1994-10-07 | 2001-05-15 | Maxwell Energy Products, Inc. | Multi-electrode double layer capacitor having single electrolyte seal and aluminum-impregnated carbon cloth electrodes |
| JP2002110464A (en) * | 2000-09-29 | 2002-04-12 | Nippon Chemicon Corp | Solid-state electrolytic capacitor and method of manufacturing the same |
| US6411497B2 (en) * | 1999-12-24 | 2002-06-25 | Japan Vilene Co., Ltd. | Separator for electric double-layer capacitor |
| US6449139B1 (en) | 1999-08-18 | 2002-09-10 | Maxwell Electronic Components Group, Inc. | Multi-electrode double layer capacitor having hermetic electrolyte seal |
| US6631074B2 (en) | 2000-05-12 | 2003-10-07 | Maxwell Technologies, Inc. | Electrochemical double layer capacitor having carbon powder electrodes |
| US6813139B2 (en) | 2001-11-02 | 2004-11-02 | Maxwell Technologies, Inc. | Electrochemical double layer capacitor having carbon powder electrodes |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5830120A (en) * | 1981-08-17 | 1983-02-22 | 松下電器産業株式会社 | Electric doulbe layer capacitor |
| JPS60500471A (en) * | 1982-12-30 | 1985-04-04 | レ コンデンサトウ−ル シク サフコ | Novel composite separators for electrolytic capacitors and electrolytic capacitors containing this type of separator |
| JPS63146350A (en) * | 1986-12-08 | 1988-06-18 | Matsushita Electric Ind Co Ltd | Separator for enclosed lead storage battery |
-
1988
- 1988-09-01 JP JP63219059A patent/JPH0266917A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5830120A (en) * | 1981-08-17 | 1983-02-22 | 松下電器産業株式会社 | Electric doulbe layer capacitor |
| JPS60500471A (en) * | 1982-12-30 | 1985-04-04 | レ コンデンサトウ−ル シク サフコ | Novel composite separators for electrolytic capacitors and electrolytic capacitors containing this type of separator |
| JPS63146350A (en) * | 1986-12-08 | 1988-06-18 | Matsushita Electric Ind Co Ltd | Separator for enclosed lead storage battery |
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04151816A (en) * | 1990-10-15 | 1992-05-25 | Nec Corp | Electric double layer capacitor |
| JPH04162411A (en) * | 1990-10-24 | 1992-06-05 | Nec Corp | Electric double layer capacitor |
| US6233135B1 (en) | 1994-10-07 | 2001-05-15 | Maxwell Energy Products, Inc. | Multi-electrode double layer capacitor having single electrolyte seal and aluminum-impregnated carbon cloth electrodes |
| US5777428A (en) * | 1994-10-07 | 1998-07-07 | Maxwell Energy Products, Inc. | Aluminum-carbon composite electrode |
| US5862035A (en) * | 1994-10-07 | 1999-01-19 | Maxwell Energy Products, Inc. | Multi-electrode double layer capacitor having single electrolyte seal and aluminum-impregnated carbon cloth electrodes |
| US5907472A (en) * | 1994-10-07 | 1999-05-25 | Maxwell Laboratories, Inc. | Multi-electrode double layer capacitor having single electrolyte seal and aluminum-impregnated carbon cloth electrodes |
| US6059847A (en) * | 1994-10-07 | 2000-05-09 | Maxwell Energy Products, Inc. | Method of making a high performance ultracapacitor |
| US6094788A (en) * | 1994-10-07 | 2000-08-01 | Maxwell Energy Products, Inc. | Method of making a multi-electrode double layer capacitor having single electrolyte seal and aluminum-impregnated carbon cloth electrodes |
| US5621607A (en) * | 1994-10-07 | 1997-04-15 | Maxwell Laboratories, Inc. | High performance double layer capacitors including aluminum carbon composite electrodes |
| US6585152B2 (en) | 1994-10-07 | 2003-07-01 | Maxwell Technologies, Inc. | Method of making a multi-electrode double layer capacitor having single electrolyte seal and aluminum-impregnated carbon cloth electrodes |
| US6451073B1 (en) | 1994-10-07 | 2002-09-17 | Maxwell Electronic Components Group, Inc. | Method of making a multi-electrode double layer capacitor having single electrolyte seal and aluminum-impregnated carbon cloth electrodes |
| US6430031B1 (en) | 1994-10-07 | 2002-08-06 | Maxwell Electronic Components Group, Inc. | Low resistance bonding in a multi-electrode double layer capacitor having single electrolyte seal and aluminum-impregnated carbon cloth electrodes |
| US6449139B1 (en) | 1999-08-18 | 2002-09-10 | Maxwell Electronic Components Group, Inc. | Multi-electrode double layer capacitor having hermetic electrolyte seal |
| US6842330B2 (en) | 1999-08-18 | 2005-01-11 | Maxwell Technologies, Inc. | Multi-electrode double layer capacitor having hermetic electrolyte seal |
| US6411497B2 (en) * | 1999-12-24 | 2002-06-25 | Japan Vilene Co., Ltd. | Separator for electric double-layer capacitor |
| US6631074B2 (en) | 2000-05-12 | 2003-10-07 | Maxwell Technologies, Inc. | Electrochemical double layer capacitor having carbon powder electrodes |
| JP2002110464A (en) * | 2000-09-29 | 2002-04-12 | Nippon Chemicon Corp | Solid-state electrolytic capacitor and method of manufacturing the same |
| US6813139B2 (en) | 2001-11-02 | 2004-11-02 | Maxwell Technologies, Inc. | Electrochemical double layer capacitor having carbon powder electrodes |
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