JP2002231588A - Electric double-layered capacitor - Google Patents
Electric double-layered capacitorInfo
- Publication number
- JP2002231588A JP2002231588A JP2001029542A JP2001029542A JP2002231588A JP 2002231588 A JP2002231588 A JP 2002231588A JP 2001029542 A JP2001029542 A JP 2001029542A JP 2001029542 A JP2001029542 A JP 2001029542A JP 2002231588 A JP2002231588 A JP 2002231588A
- Authority
- JP
- Japan
- Prior art keywords
- electric double
- activated carbon
- average particle
- particle size
- double layer
- 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.)
- Withdrawn
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
Landscapes
- Electric Double-Layer Capacitors Or The Like (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、電気二重層キャパ
シタに関し、特に、それを駆動するための分極性電極に
関するものである。The present invention relates to an electric double layer capacitor, and more particularly to a polarizable electrode for driving the same.
【0002】[0002]
【従来の技術】電気二重層キャパシタには、比較的小型
小大容量のものと比較的大型大容量のものとがある。2. Description of the Related Art There are two types of electric double-layer capacitors: relatively small, small and large-capacity capacitors and relatively large and large-capacity capacitors.
【0003】比較的小型小容量の電気二重層キャパシタ
は、集電体上に活性炭を主とする分極性電極層を形成し
た一対の分極性電極の間にポリプロピレン不織布等のセ
パレータを挾んで素子とし、この素子に電解液を含浸さ
せて金属容器に収容し、封ロ板とガスケットにより金属
容器に密封したコイン型の構造をとっている。[0003] A relatively small and small-capacity electric double layer capacitor is formed as an element by interposing a separator such as a polypropylene non-woven fabric between a pair of polarizable electrodes having a polarizable electrode layer mainly composed of activated carbon formed on a current collector. The element is impregnated with an electrolytic solution, accommodated in a metal container, and sealed in a metal container with a sealing plate and a gasket to form a coin-type structure.
【0004】一方、比較的大容量の電気二重層キャパシ
タは、対のシート状分極性電極の間にセパレータを挾ん
だ積層シートを巻回して素子とし、この素子に電解液を
含浸させて金属容器に収容し、金属開口部を封口部材で
密閉した巻回型の構造をとっている。これらの電気二重
層キャパシタは主にCメモリのバックアップやアクチュ
エータのバックアップに使用されている。On the other hand, a relatively large-capacity electric double-layer capacitor is formed by winding a laminated sheet having a separator interposed between a pair of sheet-shaped polarizable electrodes to form an element. It is housed in a container and has a wound structure in which the metal opening is sealed with a sealing member. These electric double layer capacitors are mainly used for backup of C memory and backup of actuators.
【0005】これらの電気二重層キャパシタを構成する
分極性電極は、従来大表面積を有する活性炭を主とする
ものである。巻回型のキャパシタでは活性炭扮末などを
PTFE(ポリテトラフルオロエチレン)をバインダと
して混練しシート状に形成したものが、またコイン型の
キャパシタでは上記シート状活性炭もしくは活性炭繊維
布が用いられている。The polarizable electrodes constituting these electric double layer capacitors have conventionally been mainly made of activated carbon having a large surface area. In the wound type capacitor, activated carbon powder is kneaded with PTFE (polytetrafluoroethylene) as a binder to form a sheet, and in the coin type capacitor, the above-mentioned activated carbon or activated carbon fiber cloth is used. .
【0006】[0006]
【発明が解決しようとする課題】しかしながら、従来の
分極性電極を用いた電気二重層キャパシタは、分極性電
極中の炭素材料が少ないため、静電容量の増大が困難で
あるという問題があった。However, the conventional electric double layer capacitor using the polarizable electrode has a problem that it is difficult to increase the capacitance because the carbon material in the polarizable electrode is small. .
【0007】それ故に本発明の課題は、静電容量の増大
を可能にした電気二重層キヤパシタを提供することにあ
る。[0007] Therefore, an object of the present invention is to provide an electric double layer capacitor capable of increasing the capacitance.
【0008】[0008]
【課題を解決するための手段】本発明は、分極性電極と
電解液との界面で形成される電気二重層キヤパシタであ
つて、上記分極性電極は、平均粒径の異なる少なくとも
2種類の粉状活性炭を混合して用いて作られたものであ
ることを特徴とする電気二重層キャパシタが得られる。The present invention relates to an electric double layer capacitor formed at an interface between a polarizable electrode and an electrolytic solution, wherein the polarizable electrode has at least two kinds of powders having different average particle diameters. Thus, an electric double layer capacitor characterized by being made by mixing and using activated carbon is obtained.
【0009】前記粉状活性炭は、平均粒径が最も大きい
種類のものと平均粒径が最も小さい種類のものとの平均
粒径の差が2〜20倍の範囲内にあってもよい。[0009] The powdered activated carbon may have a difference in average particle size between the type having the largest average particle size and the type having the smallest average particle size in the range of 2 to 20 times.
【0010】前記粉状活性炭は、平均粒径の最も大きい
粉状活性炭の配合比が60〜90重量部であってもよ
い。[0010] The powdered activated carbon may have a compounding ratio of the powdered activated carbon having the largest average particle diameter of 60 to 90 parts by weight.
【0011】[0011]
【発明の実施の形態】以下に、本発明の実施の形態につ
いて図面を用いて説明する。Embodiments of the present invention will be described below with reference to the drawings.
【0012】図1に、本発明の第1の実施の形態に係る
コイン型の電気二重層キャパシタの縦断面図を示す。図
1に示すように、ステンレススチールからなる金属ケー
ス10を使用し、その内側に導電性接着剤12を塗布し
たのち、分極性電極14を内底部に固着した。また、ス
テンレススチールからなる金属蓋11にも、上記と同様
の方法で分極性電極14を内底部に固着した。なお、金
属ケース10および金属蓋11には、ステンレススチー
ルを用いたが、アルミニウムでもよい。FIG. 1 is a longitudinal sectional view of a coin-type electric double layer capacitor according to a first embodiment of the present invention. As shown in FIG. 1, a metal case 10 made of stainless steel was used, a conductive adhesive 12 was applied on the inside thereof, and then a polarizable electrode 14 was fixed to the inner bottom. The polarizable electrode 14 was also fixed to the inner bottom of the metal lid 11 made of stainless steel in the same manner as described above. Although stainless steel is used for the metal case 10 and the metal lid 11, aluminum may be used.
【0013】分極性電極14に使用する粉状活性炭は、
平均粒径が1〜80μmのものを使用し、平均粒径の大
きい活性炭の配合比を50〜100重量部とした。これ
らの平均粒径および配合比を表1のLot.1〜20
に、また、粉状活性炭の粒度分布を図2に示す。The activated carbon powder used for the polarizable electrode 14 is as follows.
Activated carbon having an average particle size of 1 to 80 μm was used, and the mixing ratio of activated carbon having a large average particle size was 50 to 100 parts by weight. The average particle size and the mixing ratio of these particles are shown in Lot. 1-20
FIG. 2 shows the particle size distribution of the powdered activated carbon.
【0014】次に、上記粉状活性炭なとの炭素材料を混
練し成形することによって、分極性電極14を作製し
た。Next, the polarizable electrode 14 was manufactured by kneading and molding the carbon material such as the powdered activated carbon.
【0015】この分極性電極14に電解液として、1k
mol/m3のテトラエチルアンモニウムテトラフルオ
ロボレート−プロピレンカーボネート溶液を含浸し、か
つ、この分極性電極14をそれらの間にポリプロピレン
不織布等のセパレータ13を介して重ね合わせ、そし
て、金属ケース10および金属蓋11の周縁部を、ガス
ケット15を介して一体的に加締て封口した。1 k of electrolytic solution is applied to the polarizable electrode 14 as an electrolytic solution.
mol / m 3 of a tetraethylammonium tetrafluoroborate-propylene carbonate solution, and the polarizable electrodes 14 are overlapped between them via a separator 13 such as a polypropylene non-woven fabric. The peripheral edge of 11 was integrally crimped via a gasket 15 and sealed.
【0016】図1のコイン型の電気二重層キャパシタに
よれば、分極性電極の材料である粉状活性炭が、2種類
以上の粒径を有する粉状活性炭の混合よりなるため、従
来と同体積の分極性電極内に、より多くの粉状活性炭が
充填されるようになる。この結果、静電容量が増大す
る。According to the coin-type electric double layer capacitor shown in FIG. 1, the powdered activated carbon, which is the material of the polarizable electrode, is composed of a mixture of powdered activated carbons having two or more kinds of particle diameters. , More powdered activated carbon is filled in the polarizable electrode. As a result, the capacitance increases.
【0017】具体的に静電容量を測定した結果を表1に
示す。Table 1 shows the results of specific measurements of the capacitance.
【0018】[0018]
【表1】 [Table 1]
【0019】全般的に大きな静電容量が得られるが、中
でもLot.2、3、4、5、6、9、10、11、1
2、13、17、18、19によるものにおいては特に
静電容量が高い。即ち、以下の条件を満たしているもの
は静電容量の限界を高める上でさらに有利であることが
わかる。A large capacitance can be generally obtained. 2, 3, 4, 5, 6, 9, 10, 11, 1
2, 13, 17, 18, and 19 have particularly high capacitance. That is, it can be seen that those satisfying the following conditions are more advantageous in increasing the limit of the capacitance.
【0020】平均粒径が最も大きい種類のものと平均
粒径が最も小さい種類のものとの平均粒径の差が2〜2
0倍の範囲内にある。The difference in average particle size between the type having the largest average particle size and the type having the smallest average particle size is 2-2.
It is within the range of 0 times.
【0021】平均粒径の最も大きい粉状活性炭の配合
比が60〜90重量部である。The mixing ratio of the powdered activated carbon having the largest average particle size is 60 to 90 parts by weight.
【0022】図3に、本発明の第2の実施の形態に係る
巻回型の電気二重層キャパシタの一部切り欠き斜視図を
示す。図3において、厚み30μmのアルミ箔状の導電
性集電体22上に、粉状活性炭など(バインダを除く)
を混練して得られたスラリー状のぺーストを厚み100
μmになるように塗工して、分極性電極21を形成し
た。ここでも平均粒径の異なる2種類の粉状活性炭を用
いた。2種類の粉状活性炭の配合重量比を、表2のLo
t.21〜40に示す。FIG. 3 is a partially cutaway perspective view of a wound-type electric double layer capacitor according to a second embodiment of the present invention. In FIG. 3, powdery activated carbon or the like (excluding binder) is placed on a 30 μm-thick aluminum foil-shaped conductive current collector 22.
The paste in the form of slurry obtained by kneading
The polarizable electrode 21 was formed by coating to a thickness of μm. Again, two types of powdered activated carbons having different average particle sizes were used. The blending weight ratio of the two types of powdered activated carbon was calculated according to Lo in Table 2.
t. 21 to 40.
【0023】[0023]
【表2】 [Table 2]
【0024】これに、アルミ電極リード20を針加締に
より、導電性集電体に機械接続させたものを、セパレー
タ23と共に巻回し、電解液を含浸後、アルミ外装ケー
ス25に、ゴムキャップ24を用いて封入した。電解液
としては、1kmol/m3のテトラエチルアンモニウム
テトラフルオロボレート−プロピレンカーボネート溶液
を用いた。このようにして、巻回型の電気二重層キャパ
シタを得た。An aluminum electrode lead 20 mechanically connected to a conductive current collector by needle caulking is wound with a separator 23 and impregnated with an electrolytic solution. And sealed. As the electrolytic solution, a 1 kmol / m 3 tetraethylammonium tetrafluoroborate-propylene carbonate solution was used. Thus, a wound type electric double layer capacitor was obtained.
【0025】図3の巻回型の電気二重層キャパシタによ
れば、分極性電極の材科である粉状活性炭が、2種類以
上の粒径を有する粉状活性炭の混合よりなるため、従来
と同体積の分極性電極内に、より多くの粉状活性炭が充
填されるようになる。この結果、静電容量が増大する。According to the wound electric double layer capacitor shown in FIG. 3, the powdered activated carbon, which is a material of the polarizable electrode, is composed of a mixture of powdered activated carbons having two or more kinds of particle diameters. The same volume of the polarizable electrode is filled with more powdered activated carbon. As a result, the capacitance increases.
【0026】具体的に静電容量を測定した結果を表2に
示す。全般的に大きな静電容量が得られるが、中でもL
ot Lot 22、23、24、25、26、29、
30、31、32、33、37、38、39によるもの
においては特に静電容量が高い。Table 2 shows the results of specific measurements of the capacitance. A large capacitance can be generally obtained.
ot Lot 22, 23, 24, 25, 26, 29,
The elements 30, 30, 32, 33, 37, 38, 39 have particularly high capacitance.
【0027】本発明を適用できる電気二重層キャパシ夕
の形態は、上記の実施例に限定されるものではない。ま
た、上述した実施の形態においては2種類の平均粒径を
有する粉状活性炭を使用したが、3種類以上の平均粒径
を有する粉状活性炭を使用してもよい。この場合におい
ては、各種類間の平均粒径の差を2倍以上にするのが好
ましい。例えば、3種類の場合は、使用する各々の粉状
活性炭の平均粒径を80μm、30μm、10μm、4
種類の場合は、同様に80μm、30μm、10μm、
4μmというようにする。The form of the electric double layer capacity to which the present invention can be applied is not limited to the above embodiment. Further, in the above-described embodiment, powdered activated carbon having two kinds of average particle diameters is used, but powdered activated carbon having three or more kinds of average particle diameters may be used. In this case, it is preferable to make the difference between the average particle diameters of the respective types twice or more. For example, in the case of three types, the average particle size of each powdery activated carbon used is 80 μm, 30 μm, 10 μm,
For the types, similarly, 80 μm, 30 μm, 10 μm,
4 μm.
【0028】[0028]
【発明の効果】以上説明したように、本発明の電気二重
層キャパシタによれば、分極性電極中に炭素材料がより
多く充填されるようになるため、静電容量の増大が可能
になる。As described above, according to the electric double layer capacitor of the present invention, the polarizable electrode is more filled with the carbon material, so that the capacitance can be increased.
【図1】本発明の第1の実施の形態に係るコイン型の電
気二重層キャパシタを示す縦断面図である。FIG. 1 is a longitudinal sectional view showing a coin-type electric double layer capacitor according to a first embodiment of the present invention.
【図2】図1の電気二重層キャパシ夕における粉状活性
炭の粒度分布を表わすグラフである。FIG. 2 is a graph showing the particle size distribution of powdered activated carbon in the electric double layer capacity shown in FIG.
【図3】本発明の第2の実施の形態に係る巻回型の電気
二重層キャパシタを示す一部切り欠き斜視図である。FIG. 3 is a partially cutaway perspective view showing a wound-type electric double layer capacitor according to a second embodiment of the present invention.
10 金属ケース 11 金属蓋 12 導電性接着剤 13 セパレータ 14 分極性電極 15 ガスケット 20 アルミ電極リード 21 分極性電極 22 導電性集電体 23 セパレータ 24 ゴムキャップ 25 アルミ外装ケ一ス DESCRIPTION OF SYMBOLS 10 Metal case 11 Metal cover 12 Conductive adhesive 13 Separator 14 Polarized electrode 15 Gasket 20 Aluminum electrode lead 21 Polarized electrode 22 Conductive current collector 23 Separator 24 Rubber cap 25 Aluminum exterior case
Claims (3)
る電気二重層キャパシタであって、上記分極性電極は、
平均粒径の異なる少なくとも2種類の粉状活性炭を混合
して用いて作られたものであることを特徴とする電気二
重層キャパシタ。1. An electric double layer capacitor formed at an interface between a polarizable electrode and an electrolytic solution, wherein the polarizable electrode comprises:
An electric double layer capacitor characterized by being made by mixing at least two types of powdered activated carbons having different average particle sizes.
い種類のものと平均粒径が最も小さい種類のものとの平
均粒径の差が2〜20倍の範囲内にある請求項1に記載
の電気二重層キャパシタ。2. The powdered activated carbon has a difference in average particle diameter between a type having the largest average particle size and a type having the smallest average particle size in a range of 2 to 20 times. 3. The electric double layer capacitor according to claim 1.
い粉状活性炭の配合比が60〜90重量部である請求項
1又は2に記載の電気二重層キャパシタ。3. The electric double layer capacitor according to claim 1, wherein the powdered activated carbon has a compounding ratio of the powdered activated carbon having the largest average particle diameter of 60 to 90 parts by weight.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2001029542A JP2002231588A (en) | 2001-02-06 | 2001-02-06 | Electric double-layered capacitor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2001029542A JP2002231588A (en) | 2001-02-06 | 2001-02-06 | Electric double-layered capacitor |
Publications (1)
Publication Number | Publication Date |
---|---|
JP2002231588A true JP2002231588A (en) | 2002-08-16 |
Family
ID=18893881
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2001029542A Withdrawn JP2002231588A (en) | 2001-02-06 | 2001-02-06 | Electric double-layered capacitor |
Country Status (1)
Country | Link |
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JP (1) | JP2002231588A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100465022B1 (en) * | 2002-08-28 | 2005-01-13 | (주)에스와이하이테크 | High power capacitor and method of Fabricating the same |
WO2007034873A1 (en) * | 2005-09-22 | 2007-03-29 | Honda Motor Co., Ltd. | Polarizable electrode and electrical double layer capacitor |
US7414825B2 (en) | 2005-06-27 | 2008-08-19 | Sanyo Electric Co., Ltd. | Electrochemical device |
-
2001
- 2001-02-06 JP JP2001029542A patent/JP2002231588A/en not_active Withdrawn
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100465022B1 (en) * | 2002-08-28 | 2005-01-13 | (주)에스와이하이테크 | High power capacitor and method of Fabricating the same |
US7414825B2 (en) | 2005-06-27 | 2008-08-19 | Sanyo Electric Co., Ltd. | Electrochemical device |
WO2007034873A1 (en) * | 2005-09-22 | 2007-03-29 | Honda Motor Co., Ltd. | Polarizable electrode and electrical double layer capacitor |
JPWO2007034873A1 (en) * | 2005-09-22 | 2009-03-26 | 本田技研工業株式会社 | Polarized electrode and electric double layer capacitor |
JP4594987B2 (en) * | 2005-09-22 | 2010-12-08 | 本田技研工業株式会社 | Polarized electrode and electric double layer capacitor |
US8194394B2 (en) | 2005-09-22 | 2012-06-05 | Honda Motor Co., Ltd. | Polarized electrode and electric double-layer capacitor |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20080513 |