JPH0393213A - Electric double layer capacitor - Google Patents
Electric double layer capacitorInfo
- Publication number
- JPH0393213A JPH0393213A JP23003589A JP23003589A JPH0393213A JP H0393213 A JPH0393213 A JP H0393213A JP 23003589 A JP23003589 A JP 23003589A JP 23003589 A JP23003589 A JP 23003589A JP H0393213 A JPH0393213 A JP H0393213A
- Authority
- JP
- Japan
- Prior art keywords
- carbon
- electrode plate
- fiber
- double layer
- electric double
- 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.)
- Granted
Links
- 239000003990 capacitor Substances 0.000 title claims description 23
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 29
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 27
- 229920000049 Carbon (fiber) Polymers 0.000 claims abstract description 20
- 239000004917 carbon fiber Substances 0.000 claims abstract description 20
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000002759 woven fabric Substances 0.000 claims description 6
- 239000008151 electrolyte solution Substances 0.000 claims description 3
- 239000003575 carbonaceous material Substances 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 239000000835 fiber Substances 0.000 abstract description 7
- 239000012779 reinforcing material Substances 0.000 abstract description 5
- 230000006870 function Effects 0.000 abstract description 3
- 238000005245 sintering Methods 0.000 abstract description 3
- 238000005336 cracking Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 239000003792 electrolyte Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000015654 memory Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000035939 shock Effects 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、電気二重層原理を利用した大静電容量を有す
る電気二重層コンデンサに関する．（従来の技術）
近年、電子装置のメモリーのバックアップ用の電源とし
て電気二重層原理を用いた大静電容量のコンデンサが開
発され、マイクロコンピュータやＩＣメモリーなどに組
込まれて広く使用されている．
この種の電気二重層コンデンサの電極は粒状活性炭に電
解液として希硫酸を含浸させたペースト状のものが主流
であるが、コンデンサを大型として大静電容量にする場
合、ペースト状電極の流動を防止するため、粒状カーボ
ンを焼結させ電解液を含浸させた板状電極を用いる提案
がなされている．そして、この種の提案として比表面積
の大きいカーボンを含んだ電解液に対し、不活性な金属
粉末を主体とした焼結体の電極をセパレータを介して配
置し、′電解液を内蔵した外装缶に封入した大容量コン
デンサが特開昭４９−８７５３号公報に開示されている
．
（発明が解決しようとする課題）
上述の公開公報に開示された提案においては、大静電容
量のコンデンサとするには面積の大なる焼結カーボン電
極が必要であり、大型の電極の場合、その圧縮時や、外
部からの振動、衝撃に対して割れを生じ易く、大面積の
電極が作り難いという問題があった．
本発明はこのような問題に鑑みてなされたものであり、
その目的は大面積の焼結カーボン電極を強化して破損を
防止しようとする電気二重層コンデンサを提供すること
にある。Detailed Description of the Invention (Field of Industrial Application) The present invention relates to an electric double layer capacitor that utilizes the electric double layer principle and has a large capacitance. (Prior Art) In recent years, large capacitance capacitors using the electric double layer principle have been developed as backup power sources for memories in electronic devices, and are widely used in microcomputers, IC memories, and the like. The electrodes of this type of electric double layer capacitor are mainly paste-like ones made by impregnating granular activated carbon with dilute sulfuric acid as an electrolyte, but when making a large capacitor with a high capacitance, the flow of the paste-like electrode is To prevent this, a proposal has been made to use a plate-shaped electrode made of sintered granular carbon and impregnated with electrolyte. As a proposal of this type, for an electrolytic solution containing carbon with a large specific surface area, an electrode made of a sintered body mainly made of inert metal powder is arranged with a separator in between, and an outer can containing the electrolytic solution is placed. A large-capacity capacitor sealed in a capacitor is disclosed in Japanese Patent Application Laid-Open No. 49-8753. (Problems to be Solved by the Invention) In the proposal disclosed in the above-mentioned publication, a sintered carbon electrode with a large area is required for a capacitor with a large capacitance, and in the case of a large electrode, The problem was that it was prone to cracking during compression, external vibrations, and shocks, making it difficult to make large-area electrodes. The present invention was made in view of such problems,
The purpose is to provide an electric double layer capacitor that strengthens a large area sintered carbon electrode to prevent damage.
（課題を解決するための手段）
本発明によれば、カーボン素材からなる電極板と電解液
とを有する電気二重層コンデンサにおいて、前記電極板
は粒状カーボンとカーボン繊維とを混合して焼結せしめ
た電気二重層コンデンサが提供される．
（作用）
本発明では、電気二重層コンデンサ・の電極板として、
粒状カーボンとカーボン繊維とを混合して焼結させたの
で、カーボン繊維が電極板の強化材となり、板状の電極
の割れや破損が防止できる．また本発明では、粒状カー
ボンとカーボン繊維との混合比を変化させ、電極板内の
位置に応じて所望する粗密度に設定したので、性能の優
れたコンデンサを得ることができる．
（実施例）
つぎＣ本発明の実施例について図面を用いて詳細じ説明
する．
第１図は本発明にかかる電気二重層コンデンサの断面図
であり、第２図はその電極板の第１の実施例を示す説明
図である。(Means for Solving the Problems) According to the present invention, in an electric double layer capacitor having an electrode plate made of a carbon material and an electrolyte, the electrode plate is made by mixing and sintering granular carbon and carbon fiber. An electric double layer capacitor is provided. (Function) In the present invention, as an electrode plate of an electric double layer capacitor,
Since granular carbon and carbon fiber are mixed and sintered, the carbon fiber acts as a reinforcing material for the electrode plate, preventing cracking and damage to the plate-shaped electrode. Furthermore, in the present invention, the mixing ratio of granular carbon and carbon fibers is varied and the desired coarse density is set depending on the position within the electrode plate, making it possible to obtain a capacitor with excellent performance. (Example) Next, an example of the present invention will be described in detail with reference to the drawings. FIG. 1 is a sectional view of an electric double layer capacitor according to the present invention, and FIG. 2 is an explanatory view showing a first embodiment of the electrode plate thereof.
第１図において、１は集電板で電気の良導体からなり、
電極板２に接触して集電するもので、絶縁ガスケット３
に囲まれた電極板の上下面に配置されている．
電極板２はセパレータ４を挟み、絶縁ガスケット３の内
側に配置され、第２図に示すように粒状カーボン２１と
カーボン繊維２２とを混合し、焼結により板状に形成し
たもので、カーボン繊維２２はその表面積が粒状カーボ
ン２１と同等程度のものが用いられている．
そして、カーボン繊維２２はその形状が所定の長さのｍ
維状であるため、粒状カーボン２１と混合されて焼結さ
れると、薄板状に形成されても、強化材となって割れに
強い電極板が構成されること社なる．
このように構成された本発明の第１の実施例においては
焼結させた電極板２には粒状カーボン２１だけでなく繊
維状のカーボン繊維２２が混合されているので、該カー
ボンｌｌ！！２２が強化材となって、電極板２が割れ難
くなり、大型の薄板電極板の場合でも破損が防止される
ことになる．また、本実施例に使用するカーボン繊維２
２の表面積は、粒状カーボン２１と同等程度のものが用
いられるｋめ、総てに粒状カーボン２１を用いた電極板
と同等の静電容量が得られること社なる．
つぎに、第３図は本発明の第２に実施例を示す説明図で
あり、電極板の粒状カーボンと混合するカーボン繊維の
太さ、長さ、および混合量を変化させたものである．
通常、電気二重層コンデンサの電極は、集電板側は高密
度に、セパレータ側は低密度にして電解液の希硫酸含量
を多くしたものがコンデンサとしての性能が優れるもの
である．
したがって、粒状カーボンのみを用いて焼結させた通常
の電極板では、部分的に粗密を変化させることが行い難
いが、第３図に示す実施例では粒状カーボン２１ｅ混合
するカーボン繊維２３の長さ、太さ、混合量により、集
電板側を低密度，セパレータ側を高密度に形成させて、
所゛望する粗密の変化を行わせ、性能の向上が計れるこ
とになる．
第４図は本発明の第３の実施例の電極板の構成を示す説
明図であり、この第３の実施例においては、粒状カーボ
ン２１とカーボン繊維による織布２４とを混合して焼結
した電極板を示したものである．
そして、電極板の両側面近傍に織布２４を配置したため
、電極板の割れや破損に対しては織布４のカーボン繊維
が強度を保ち、大型の薄板の１極でも破損が防止される
ことになる．
なお、織布２４を構成するカーボン繊維の表ｄ積は、粒
状カーボン２１と同等程度のものが用レられることによ
り、大静電容量のコンデンサが｛｛られることになる．
以上、本発明を上述の実施例によって説明し力が、本発
明の主旨の範囲内での種々の変形が可顛であり、これら
の変形を本発明の範囲から排除１るものではない．
（発明の効果）
本発明によれば、電気二重層コンデンサの電ね板に、粒
状カーボンとカーボン繊維とを混合して焼結したものを
用いたので、電極板内のカーボ〉繊雑の強度により、電
極板の割れや破損が防止でき、大面積の電極板でも割れ
難いという効果が祠られる．
また本発明によれば、混合するカーボン繊維を単なるｌ
ａ維の形状でなく、織布に加工して粒秒カーボンと混合
して焼結したので、板状の電極の強度が更に向上する利
点がある．
ざら２本発明では、粒状カーボンとカーボン繊維の混合
比を変化させ、電極板内の部分により所望する粗密，に
調節したので、効率のよい電気二重層コンデンサが得ら
れるという効果も生ずる．In Figure 1, 1 is a current collector plate made of a good electrical conductor.
It contacts the electrode plate 2 to collect current, and the insulating gasket 3
It is placed on the upper and lower surfaces of the electrode plate surrounded by. The electrode plate 2 is placed inside the insulating gasket 3 with a separator 4 in between, and is made by mixing granular carbon 21 and carbon fiber 22 and forming it into a plate shape by sintering, as shown in FIG. 22 has a surface area comparable to that of granular carbon 21. The carbon fiber 22 has a shape with a predetermined length m
Since it is in the form of fibers, when it is mixed with the granular carbon 21 and sintered, even if it is formed into a thin plate, it becomes a reinforcing material and forms an electrode plate that is resistant to cracking. In the first embodiment of the present invention configured as described above, the sintered electrode plate 2 contains not only granular carbon 21 but also fibrous carbon fibers 22, so that the carbon ll! ! 22 acts as a reinforcing material, making the electrode plate 2 difficult to break, and even in the case of a large thin electrode plate, breakage can be prevented. In addition, the carbon fiber 2 used in this example
Since the surface area of the electrode plate 2 is about the same as that of the granular carbon 21, it is possible to obtain the same capacitance as the electrode plate using the granular carbon 21. Next, FIG. 3 is an explanatory diagram showing a second embodiment of the present invention, in which the thickness, length, and amount of carbon fiber mixed with the granular carbon of the electrode plate are varied. Normally, the electrodes of an electric double layer capacitor have a high density on the current collector plate side, a low density on the separator side, and a high content of dilute sulfuric acid in the electrolyte, which gives better performance as a capacitor. Therefore, with a normal electrode plate sintered using only granular carbon, it is difficult to partially change the density, but in the embodiment shown in FIG. , depending on the thickness and mixing amount, the current collector plate side is formed with low density and the separator side is formed with high density.
By making the desired change in density, performance can be improved. FIG. 4 is an explanatory diagram showing the structure of an electrode plate according to a third embodiment of the present invention. In this third embodiment, granular carbon 21 and a woven fabric 24 made of carbon fibers are mixed and sintered. This figure shows the electrode plate. Since the woven fabric 24 is placed near both sides of the electrode plate, the carbon fibers of the woven fabric 4 maintain their strength against cracking or damage to the electrode plate, and even one pole of a large thin plate can be prevented from being damaged. become. It should be noted that by using carbon fibers constituting the woven fabric 24 whose surface d area is about the same as that of the granular carbon 21, a capacitor with a large capacitance can be obtained. Although the present invention has been described with reference to the above embodiments, various modifications may be made within the scope of the present invention, and these modifications are not excluded from the scope of the present invention. (Effects of the Invention) According to the present invention, the electrode plate of the electric double layer capacitor is made of a mixture of granular carbon and carbon fiber and sintered. This prevents the electrode plate from cracking or breaking, and has the effect that even large-area electrode plates are difficult to break. Further, according to the present invention, the carbon fibers to be mixed are simply
Because it is processed into a woven fabric, mixed with granular carbon and sintered, rather than in the form of a-fiber, it has the advantage of further improving the strength of the plate-shaped electrode. In the present invention, the mixing ratio of granular carbon and carbon fiber is varied to adjust the density to the desired density depending on the portion within the electrode plate, resulting in the effect that an efficient electric double layer capacitor can be obtained.
第１図は本発明にかかる電気二重層コンデンサの断面図
、第２図はその電極板の第１の実施例を示す説明図、第
３図は本発明の第２の実施例を示す説明図、第４図は本
発明の第３の実施例を示す説明図である．FIG. 1 is a sectional view of an electric double layer capacitor according to the present invention, FIG. 2 is an explanatory diagram showing a first embodiment of the electrode plate thereof, and FIG. 3 is an explanatory diagram showing a second embodiment of the present invention. , FIG. 4 is an explanatory diagram showing a third embodiment of the present invention.
Claims (3)
電気二重層コンデンサにおいて、前記電極板は粒状カー
ボンとカーボン繊維とを混合して焼結せしめたことを特
徴とする電気二重層コンデンサ。(1) An electric double layer capacitor comprising an electrode plate made of a carbon material and an electrolytic solution, wherein the electrode plate is made of a mixture of granular carbon and carbon fibers and sintered.
電板近傍とセパレータ近傍とにて異ならしめたことを特
徴とする請求項（１）記載の電気二重層コンデンサ。(2) The electric double layer capacitor according to claim (1), wherein the mixing ratio of the granular carbon and carbon fibers is made different in the vicinity of the current collector plate and in the vicinity of the separator.
とする請求項（１）記載の電気二重層コンデンサ。(3) The electric double layer capacitor according to claim (1), wherein the carbon fiber is used as a woven fabric.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23003589A JP2847794B2 (en) | 1989-09-05 | 1989-09-05 | Electric double layer capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23003589A JP2847794B2 (en) | 1989-09-05 | 1989-09-05 | Electric double layer capacitor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0393213A true JPH0393213A (en) | 1991-04-18 |
| JP2847794B2 JP2847794B2 (en) | 1999-01-20 |
Family
ID=16901548
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23003589A Expired - Lifetime JP2847794B2 (en) | 1989-09-05 | 1989-09-05 | Electric double layer capacitor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2847794B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002289174A (en) * | 2001-01-17 | 2002-10-04 | Nisshinbo Ind Inc | Active material mix powder for battery, electrode composition, carbon material mix powder for secondary- battery electrode, secondary battery, and electric double layer capacitor, polarizable electrode composition, polarizable electrode, and electric double layer capacitor |
| US7209341B2 (en) | 2001-09-26 | 2007-04-24 | Japan Science And Technology Agency | Polarizing electrode, manufacturing method thereof, and electric double-layer capacitor |
-
1989
- 1989-09-05 JP JP23003589A patent/JP2847794B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002289174A (en) * | 2001-01-17 | 2002-10-04 | Nisshinbo Ind Inc | Active material mix powder for battery, electrode composition, carbon material mix powder for secondary- battery electrode, secondary battery, and electric double layer capacitor, polarizable electrode composition, polarizable electrode, and electric double layer capacitor |
| US7209341B2 (en) | 2001-09-26 | 2007-04-24 | Japan Science And Technology Agency | Polarizing electrode, manufacturing method thereof, and electric double-layer capacitor |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2847794B2 (en) | 1999-01-20 |
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