JP2620794B2 - Electric double layer capacitor - Google Patents
Electric double layer capacitorInfo
- Publication number
- JP2620794B2 JP2620794B2 JP62295713A JP29571387A JP2620794B2 JP 2620794 B2 JP2620794 B2 JP 2620794B2 JP 62295713 A JP62295713 A JP 62295713A JP 29571387 A JP29571387 A JP 29571387A JP 2620794 B2 JP2620794 B2 JP 2620794B2
- Authority
- JP
- Japan
- Prior art keywords
- electric double
- double layer
- layer capacitor
- current collector
- polarizable electrode
- 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.)
- Expired - Lifetime
Links
- 239000003990 capacitor Substances 0.000 title claims description 20
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 17
- 229910052799 carbon Inorganic materials 0.000 claims description 13
- 238000010521 absorption reaction Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 5
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 4
- 238000010030 laminating Methods 0.000 claims description 2
- 230000000052 comparative effect Effects 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 239000004809 Teflon Substances 0.000 description 3
- 229920006362 Teflon® Polymers 0.000 description 3
- 239000003973 paint Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 2
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000003273 ketjen black Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000004080 punching Methods 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
Landscapes
- Electric Double-Layer Capacitors Or The Like (AREA)
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コンデンサに関する。Description: TECHNICAL FIELD The present invention relates to an electric double layer capacitor.
（従来の技術） 従来、電気二重層コンデンサは、分極性電極、セパレ
ータ及び集電体からなるコンデンサ素子をケースに収納
した構造になっている。(Prior Art) Conventionally, an electric double layer capacitor has a structure in which a capacitor element including a polarizable electrode, a separator, and a current collector is housed in a case.
分極性電極は活性炭、活性炭繊維または導電性カーボ
ンブラックなどのカーボンを主成分として形成されてい
る。そしてこの分極性電極に接触する集電体としては金
属系のエキスパンドメタルやエッチング箔又は溶射金属
等を用いている。The polarizable electrode is formed mainly of carbon such as activated carbon, activated carbon fiber or conductive carbon black. As the current collector contacting the polarizable electrode, a metal-based expanded metal, an etching foil, a sprayed metal, or the like is used.
（発明が解決しようとする問題点） しかし、集電体のこれらの材質は金属であるために分
極性電極との接触抵抗が変化し易い欠点があった。(Problems to be Solved by the Invention) However, since these materials of the current collector are metal, there is a disadvantage that the contact resistance with the polarizable electrode tends to change.
本発明の目的は、以上の欠点を改良し、分極性電極と
集電体との接触抵抗を安定化しうる電気二重層コンデン
サを提供するものである。An object of the present invention is to provide an electric double layer capacitor which can improve the above-mentioned disadvantages and stabilize the contact resistance between a polarizable electrode and a current collector.
（問題点を解決するための手段） 本発明は、上記の目的を達成するために、分極性電
極、セパレータ及び集電体からなるコンデンサ素子をケ
ースに収納した電気二重層コンデンサにおいて、分極性
電極と集電体との間に吸油量が200ml/100g（DBP法）以
上のカーボンを主成分とする中間層を積層することを特
徴とする電気二重層コンデンサを提供するものである。(Means for Solving the Problems) In order to achieve the above object, the present invention provides an electric double layer capacitor in which a capacitor element including a polarizable electrode, a separator and a current collector is housed in a case. The present invention provides an electric double layer capacitor characterized by laminating an intermediate layer mainly composed of carbon having an oil absorption of 200 ml / 100 g (DBP method) or more between a collector and a current collector.
（作用） 本発明によれば、分極性電極と集電体との間に吸油量
が200ml/100g以上のカーボンを主成分とする層は導電性
が大きく、電解液を吸収して体積が膀潤し易く、分極性
電極と集電体との接触が安定し、また液漏れも低減でき
る。(Action) According to the present invention, the layer mainly composed of carbon having an oil absorption of 200 ml / 100 g or more between the polarizable electrode and the current collector has high conductivity, absorbs the electrolytic solution, and has a small volume. It is easy to wet, the contact between the polarizable electrode and the current collector is stable, and the liquid leakage can be reduced.
（実施例） 以下、本発明を実施例に基づいて説明する。(Examples) Hereinafter, the present invention will be described based on examples.
第１図はボタン形の電気二重層コンデンサを示す。 FIG. 1 shows a button-shaped electric double layer capacitor.
１は、分極性電極であり、活性炭に20％の導電性カー
ボンブラックと15％のテフロンを加え、混合してプレス
し厚さ700μｍのシートにし、直径12mmの円板状に打ち
抜いたものである。２は、分極性電極１を分離している
セパレータであり、厚さ100μｍのポリプロピレンから
なる。３は、分極性電極１の表面に積層されたカーボン
からなる中間層であり、吸油量が480ml/100g（DBP法）
のケッチェンブラックと15％のテフロンを混合しプレス
して厚さ150μｍのシートに直径13mmの円形状に打ち抜
いたものである。４は金属製のケースであり、内面にカ
ーボンペイントからなる集電体５が形成されている。カ
ーボンの中間層３は集電体５に塗布され加熱乾燥されて
形成される。６はケース４のカシメ部７に介在されたパ
ッキンである。Reference numeral 1 denotes a polarizable electrode, which is obtained by adding 20% of conductive carbon black and 15% of Teflon to activated carbon, mixing, pressing to form a 700 μm thick sheet, and punching it into a disk having a diameter of 12 mm. . Reference numeral 2 denotes a separator that separates the polarizable electrode 1 and is made of 100 μm thick polypropylene. Reference numeral 3 denotes an intermediate layer made of carbon laminated on the surface of the polarizable electrode 1 and has an oil absorption of 480 ml / 100 g (DBP method).
Ketjen Black and 15% Teflon were mixed, pressed and punched out into a 150 μm thick sheet into a circular shape with a diameter of 13 mm. Reference numeral 4 denotes a metal case, on which a current collector 5 made of carbon paint is formed. The carbon intermediate layer 3 is formed on the current collector 5 by heating and drying. Reference numeral 6 denotes a packing interposed in the swaging portion 7 of the case 4.
また、第２図は本発明の他の実施例を示し、巻回形の
コンデンサ素子８を用いたものである。分極性電極は、
粒子径16μｍ、吸油量200ml/100g（DBP法）の導電性カ
ーボンブラックと15％のテフロンを加え混合してプレス
し、厚さ300μｍのシートを形成したものである。そし
てコンデンサ素子８は、第３図に示す通りこのシート状
の分極性電極９及び10にセパレータ11を、分極性電極９
及び10の端面12及び12′が交互にセパレータ11から突出
するように重ね合わせて巻回したものである。13はコン
デンサ素子８の両端面に積層されたカーボンの中間層で
あり、第１図の実施例と同じ成分からなる。14は円筒状
のケースであり、底部15内面に集電体16としてカーボン
ペイントが塗布されている。17は、ケース14の蓋18を貫
通している端子であり、ケース14内の端部19が円板状に
形成され、カーボンペイントが集電体20として塗布され
ている。21はケース14の底部15に接続された端子であ
る。FIG. 2 shows another embodiment of the present invention, in which a wound capacitor element 8 is used. Polarizing electrodes are
A conductive carbon black having a particle diameter of 16 μm and an oil absorption of 200 ml / 100 g (DBP method) and 15% Teflon were added, mixed and pressed to form a sheet having a thickness of 300 μm. As shown in FIG. 3, the capacitor element 8 includes a separator 11 on the sheet-shaped polarizable electrodes 9 and 10 and a polarizable electrode 9.
And 10 are overlapped and wound so that the end faces 12 and 12 ′ alternately protrude from the separator 11. Reference numeral 13 denotes a carbon intermediate layer laminated on both end faces of the capacitor element 8 and has the same components as those in the embodiment of FIG. Reference numeral 14 denotes a cylindrical case, and carbon paint is applied as a current collector 16 to the inner surface of the bottom 15. Reference numeral 17 denotes a terminal that penetrates the lid 18 of the case 14. An end 19 in the case 14 is formed in a disk shape, and carbon paint is applied as a current collector 20. Reference numeral 21 denotes a terminal connected to the bottom 15 of the case 14.
次に、本発明の実施例と比較例について、初期ESRの
バラツキが10％以内の個数と、温度60℃、湿度90％の雰
囲気中に2000Hr放置後のESRの上昇率の平均を測定した
ところ表の通りの結果が得られた。Next, with respect to the examples and comparative examples of the present invention, the number of initial ESR variations within 10% and the average of the ESR increase rate after leaving for 2000 hours in an atmosphere at a temperature of 60 ° C. and a humidity of 90% were measured. The results shown in the table were obtained.
実施例１は第１図に示したボタン形のもの、実施例２
は第２図に示した巻回形のもの、 実施例３は実施例１においてカーボンの吸油量を200m
l/100gとしたもの、 比較例１は実施例１において中間層を除去したもの、 比較例２は実施例２において中間層を除去したもの、 比較例３は実施例１においてカーボンの吸油量を150m
l/100gとしたもの、 とする。Example 1 is a button type shown in FIG. 1, Example 2
Is the wound type shown in FIG. 2, and the third embodiment is the same as the first embodiment except that the carbon oil absorption is 200 m.
1/100 g, Comparative Example 1 was obtained by removing the intermediate layer in Example 1, Comparative Example 2 was obtained by removing the intermediate layer in Example 2, and Comparative Example 3 was obtained by reducing the oil absorption of carbon in Example 1. 150m
l / 100g.
また、試料数は各々100ケとする。 The number of samples is 100 each.
表から明らかな通り、ESRのバラツキの10％以内の個
数については本願発明の方が比較例よりも多く、上昇率
については前者の方がより低くおさえられている。 As is clear from the table, the number of ESR variations within 10% is larger in the present invention than in the comparative example, and the former is lower in the rate of increase.
（発明の効果） 以上の通り、本発明によれば、分極性電極と集電体と
の間に吸油量が200ml/100g以上のカーボンを主成分とす
る中間層を設けているため、接触抵抗を安定化でき、ES
Rを改良でき、また液漏れも低減しうる電気二重層コン
デンサが得られる。(Effects of the Invention) As described above, according to the present invention, since the intermediate layer mainly composed of carbon having an oil absorption of 200 ml / 100 g or more is provided between the polarizable electrode and the current collector, the contact resistance is reduced. Can be stabilized and ES
An electric double layer capacitor that can improve R and reduce liquid leakage can be obtained.
第１図は本発明実施例の断面図、第２図は本発明の他実
施例の断面図、第３図は第２図の実施例に用いられるコ
ンデンサ素子の断面図を示す。 1,9……分極性電極、2,12……セパレータ、3,13……中
間層、4,14……ケース、5,16,20……集電体、８……コ
ンデンサ素子。1 is a sectional view of an embodiment of the present invention, FIG. 2 is a sectional view of another embodiment of the present invention, and FIG. 3 is a sectional view of a capacitor element used in the embodiment of FIG. 1,9 ... Polarizable electrode, 2,12 ... Separator, 3,13 ... Intermediate layer, 4,14 ... Case, 5,16,20 ... Current collector, 8 ... Capacitor element.
Claims (2)
るコンデンサ素子をケースに収納した電気二重層コンデ
ンサにおいて、分極性電極と集電体との間に吸油量が20
0ml/100g（DBP法）以上のカーボンを主成分とする中間
層を積層することを特徴とする電気二重層コンデンサ。1. An electric double layer capacitor in which a capacitor element comprising a polarizable electrode, a separator and a current collector is housed in a case, wherein an oil absorption between the polarizable electrode and the current collector is 20%.
An electric double layer capacitor characterized by laminating an intermediate layer mainly containing carbon of 0 ml / 100 g (DBP method) or more.
以上の導電性カーボンブラックである特許請求の範囲第
１項記載の電気二重層コンデンサ。2. Carbon has an oil absorption of 200ml / 100g (DBP method)
2. The electric double layer capacitor according to claim 1, wherein said electric double layer capacitor is the conductive carbon black.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62295713A JP2620794B2 (en) | 1987-11-24 | 1987-11-24 | Electric double layer capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62295713A JP2620794B2 (en) | 1987-11-24 | 1987-11-24 | Electric double layer capacitor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01136326A JPH01136326A (en) | 1989-05-29 |
| JP2620794B2 true JP2620794B2 (en) | 1997-06-18 |
Family
ID=17824193
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62295713A Expired - Lifetime JP2620794B2 (en) | 1987-11-24 | 1987-11-24 | Electric double layer capacitor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2620794B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3244691B2 (en) * | 1990-10-18 | 2002-01-07 | 旭硝子株式会社 | Electric double layer capacitor |
-
1987
- 1987-11-24 JP JP62295713A patent/JP2620794B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01136326A (en) | 1989-05-29 |
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