JPH0423419A - Solid electrolytic capacitor - Google Patents
Solid electrolytic capacitorInfo
- Publication number
- JPH0423419A JPH0423419A JP12866790A JP12866790A JPH0423419A JP H0423419 A JPH0423419 A JP H0423419A JP 12866790 A JP12866790 A JP 12866790A JP 12866790 A JP12866790 A JP 12866790A JP H0423419 A JPH0423419 A JP H0423419A
- Authority
- JP
- Japan
- Prior art keywords
- electrolytic
- weight
- chemical
- electrolytic capacitor
- polymerization method
- 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 abstract description 12
- 239000007787 solid Substances 0.000 title claims abstract description 10
- 238000006116 polymerization reaction Methods 0.000 claims abstract description 27
- 239000000126 substance Substances 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims abstract description 12
- 229920001940 conductive polymer Polymers 0.000 claims abstract description 11
- 239000012528 membrane Substances 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000007739 conversion coating Methods 0.000 abstract description 2
- 229920000128 polypyrrole Polymers 0.000 description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 6
- 229910052782 aluminium Inorganic materials 0.000 description 6
- 239000011888 foil Substances 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 229920006254 polymer film Polymers 0.000 description 5
- KAESVJOAVNADME-UHFFFAOYSA-N Pyrrole Chemical compound C=1C=CNC=1 KAESVJOAVNADME-UHFFFAOYSA-N 0.000 description 4
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 4
- 229910052709 silver Inorganic materials 0.000 description 4
- 239000004332 silver Substances 0.000 description 4
- 239000007784 solid electrolyte Substances 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 238000005470 impregnation Methods 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- JOXIMZWYDAKGHI-UHFFFAOYSA-N toluene-4-sulfonic acid Chemical compound CC1=CC=C(S(O)(=O)=O)C=C1 JOXIMZWYDAKGHI-UHFFFAOYSA-N 0.000 description 2
- 101150054854 POU1F1 gene Proteins 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229910001870 ammonium persulfate Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000002019 doping agent 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
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、導電性高分子からなる固体電解質を有する固
体電解コンデンサに関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a solid electrolytic capacitor having a solid electrolyte made of a conductive polymer.
アルミニウム箔などの陽極体に導電性高分子（例えばポ
リピロール）からなる固体電解質を形成するにあたって
は、まず化学重合法にてプレコート層を形成し、次に電
解重合法により電解重合膜を形成するようにしている。When forming a solid electrolyte made of a conductive polymer (for example, polypyrrole) on an anode body such as aluminum foil, first a precoat layer is formed using a chemical polymerization method, and then an electrolytic polymer film is formed using an electrolytic polymerization method. I have to.
すなわち、ポリピロールよりなる電解重合膜は導電性が
よく、ｑかも強固であるが、陽極体の表面は通常粗面化
され、かつ絶縁化されているため、これを直接陽極体上
に形成することが困難である。そこで、プレコート層を
形成して、陽極体に形成されている化成皮膜表面を導電
化するとともに、ピット中への含浸率を高めるようにし
ている。In other words, an electrolytic polymer film made of polypyrrole has good conductivity and strong Q, but since the surface of the anode body is usually roughened and insulated, it cannot be formed directly on the anode body. is difficult. Therefore, a precoat layer is formed to make the surface of the chemical conversion coating formed on the anode body conductive and to increase the impregnation rate into the pits.
なお、この固体電解質上には、カーボンペーストや銀ペ
ーストなどからなる陰極導電層が形成され、同陰極導電
層に接着銀などの導電性接着材を介して陰極リードが取
付けられる。A cathode conductive layer made of carbon paste, silver paste, or the like is formed on this solid electrolyte, and a cathode lead is attached to the cathode conductive layer via a conductive adhesive such as adhesive silver.
ポリピロールなどの導電性高分子は導電性がよいため、
特にインピーダンス特性が改善されるが、高温信頼性試
験を長時間行なうとしばしば特性劣化が生ずるという問
題があった。Conductive polymers such as polypyrrole have good conductivity, so
In particular, impedance characteristics are improved, but there is a problem in that characteristics often deteriorate when high-temperature reliability tests are conducted for a long time.
本発明者らは、この問題を種々検討した結果、その原因
はブレゴー１〜層にあることを突き止めた。As a result of various studies on this problem, the inventors of the present invention found that the cause lies in the Bregaud layers 1 to 1.
すなわち、化学重合法によるプレコート層は、多くの場
合、粉末状でありしかも電導度も低い。したがって、そ
の付着量が多すぎると、化成皮膜との剥離および同プレ
コート８４自体の比抵抗が上昇し、コンデンサ特性特に
ｔａｎδ（損失角の正接）の劣化を引き起こす。That is, the precoat layer formed by chemical polymerization is often powder-like and has low electrical conductivity. Therefore, if the amount of adhesion is too large, separation from the chemical conversion film and resistivity of the precoat 84 itself will increase, causing deterioration of capacitor characteristics, particularly tan δ (tangent of loss angle).
本発明は上記従来の課題を解決するためになされたもの
で、その構成上の特徴は、表面に化成皮膜を形成してな
る陽極体に、化学重合法にて導電性高分子のブレゴー１
〜層を形成するとともに、同ブレコー１− Ｊｌ−，１
−に電解重合法により導電性高分子からなる電解重合膜
を積層し、同電解重合膜上に陰極導電層を設けてなる固
体電解コンデンサにおいて、ブレコー１〜Ｎの重量を電
解重合膜の重量と同等もしくはそれ以下としたことにあ
る。なお、化学重合法および電解重合法による導電性高
分子の総車址は２．０■ｌａ＆以ドであることが好まし
い。The present invention has been made to solve the above-mentioned conventional problems, and its structural features are that Bregaud 1 is made of conductive polymer by chemical polymerization on an anode body with a chemical conversion film formed on the surface.
~ While forming a layer, the same Brecot 1- Jl-, 1
- In a solid electrolytic capacitor in which an electrolytic polymer film made of a conductive polymer is laminated by an electrolytic polymerization method and a cathode conductive layer is provided on the electrolytic polymer film, the weight of Brecaux 1 to N is the weight of the electrolytic polymer film. The reason is that it is equal to or lower than that. Incidentally, the total weight of the conductive polymer obtained by chemical polymerization and electrolytic polymerization is preferably 2.0 la & less.
次に、本発明の実施例を比較例とともに説明する。なお
以上の各側においては陽極体として、厚み９０μｍ、ｌ
福２．２ｍｎ、長さｌｌｎｗｎ、純度４Ｎで化成電圧８
２Ｖにて化成されたアルミニウム箔を用いた。Next, examples of the present invention will be described together with comparative examples. Furthermore, on each of the above sides, the anode body has a thickness of 90 μm and a l
Fuku 2.2mm, length llnwn, purity 4N, formation voltage 8
Aluminum foil chemically converted at 2V was used.
（実施例１）
まず、」二δ己アルミニウム箔をピロールモノマー溶液
中に浸漬した後、ドーパントとしてＩ） −１−ルエン
スルホン酸を混入した過硫酸アンモニウム水溶液に速や
かに浸漬してプレコート層を形成した。(Example 1) First, a two-delta aluminum foil was immersed in a pyrrole monomer solution, and then immediately immersed in an aqueous ammonium persulfate solution containing I)-1-luenesulfonic acid as a dopant to form a precoat layer. .
これを数回繰り返してプレコートＪＩＩＪの重量を０．
６■とした。次に、アセトニ１−リルにｐ−トルエンス
ルホン酸、ビロールモノマーを混入した電解液にブレコ
ーＩ−層付きのアルミニウム箔を浸漬し。Repeat this several times to reduce the weight of Precoat JIIJ to 0.
It was set as 6■. Next, the aluminum foil with the Breco I layer was immersed in an electrolytic solution containing acetonyl-1-lyl, p-toluenesulfonic acid, and pyrrole monomer.
プレコート層を陽極、ステンレス容器を陰極にして、定
電流にて３０分電解重合を行ない、ポリピロール膜をさ
らに０．８■形成した。十分に乾燥した後、カーボン、
銀塗料および導電性接着銀により陰極リードを取付け、
エポキシ樹脂で外装した。Using the precoat layer as an anode and the stainless steel container as a cathode, electrolytic polymerization was carried out at a constant current for 30 minutes to form an additional 0.8 inch polypyrrole film. After drying thoroughly, carbon
Attach the cathode lead with silver paint and conductive adhesive silver,
Covered with epoxy resin.
最後に、直流電圧２］、Ｖを３時間印加してニージング
を行なった。Finally, kneading was performed by applying a DC voltage 2], V for 3 hours.
（実施例２）
実施例１と同じ化学重合法にてプレコート層を重量にし
て０．８■形成し、しかるのち実施例１と同じ電解重合
法にてポリピロール膜を重量にして０．８■形成した。(Example 2) A precoat layer with a weight of 0.8 cm was formed using the same chemical polymerization method as in Example 1, and then a polypyrrole film was formed with a weight of 0.8 cm using the same electrolytic polymerization method as in Example 1. Formed.
〈比較例１）
実施例１と同じ化学重合法にてブレゴー１〜層を重量に
して１．２ｍｇ形成し、しかるのち実施例１と同じ電解
重合法にてポリピロール膜を重量にして０．８■形成し
た。<Comparative Example 1> Bregaud 1 to layer 1 to 1.2 mg in weight were formed by the same chemical polymerization method as in Example 1, and then a polypyrrole film was formed in a weight of 0.8 mg by the same electrolytic polymerization method as in Example 1. ■ Formed.
上記実施例１，２および比較例１により得たアルミニウ
ム箔を使用して定格電圧１６Ｖ、静電容量２．２μＦの
固体電解コンデンサをそれぞれ試作し。Using the aluminum foils obtained in Examples 1 and 2 and Comparative Example 1, solid electrolytic capacitors with a rated voltage of 16 V and a capacitance of 2.2 μF were manufactured as prototypes.
１２０七時の静電容量（μＦ）と損失角の正接（ｔａｎ
δ）を測定した結果を成人に示す。なお参考までに、各
アルミニウム箔について、ポリピロールのピッ１へ中へ
の含浸率を同表中に示す。1207 o'clock capacitance (μF) and loss angle tangent (tan
Show the results of measuring δ) to adults. For reference, the impregnation rate of polypyrrole into Pit 1 for each aluminum foil is shown in the same table.
量をポリピロール膜の重量以下とすることにより、損失
角の正接が改善されることが認められた。It was found that the tangent of the loss angle was improved by making the amount less than the weight of the polypyrrole film.
また、試作した上記各固体電解コンデンサについて、１
０５℃高温負荷試験を長時間実施して、その静電容量変
化率および損失角の正接の変化率を測定したグラフを第
１図に示すが、同図から明らかなように、実施例１，２
ともに静電容量および損失角の正接が初期から１０００
時間経過に至るまでほぼ安定しているに対し、比較例１
においてはかなりの特性劣化が見られた。In addition, for each of the above prototype solid electrolytic capacitors, 1
Figure 1 shows a graph of the rate of change in capacitance and the rate of change in the tangent of the loss angle after conducting a long-term high-temperature load test at 05°C. 2
Both capacitance and loss angle tangent are 1000 from the beginning.
Comparative example 1 is almost stable over time.
Considerable deterioration of characteristics was observed.
以上説明したように、本発明によれば、導電性高分子か
らなる固体電解質を有する固体電解コンデンサにおいて
、化学重合によるブレコー１−ＪｆＪの重量を電解重合
による電解重合膜の重量以下としたことにより、高温信
頼性の高い固体電解コンデンサが提供される。As explained above, according to the present invention, in a solid electrolytic capacitor having a solid electrolyte made of a conductive polymer, the weight of Breco 1-JfJ produced by chemical polymerization is made equal to or less than the weight of the electrolytic polymerized membrane produced by electrolytic polymerization. , a solid electrolytic capacitor with high high temperature reliability is provided.
第１図は本発明の実施例と比較例についての高温負荷試
験実施時の静電容量変化率と損失角の正接の変化率を示
したグラフである。
特 許 出 願 人 エルナー株式会社特 許 出
願人 旭硝子株式会社
代理人 弁理士 大 原 拓 也FIG. 1 is a graph showing the rate of change in capacitance and the rate of change in the tangent of loss angle during high-temperature load tests for Examples and Comparative Examples of the present invention. Patent applicant Elna Co., Ltd. Patent applicant
Applicant: Asahi Glass Co., Ltd. Agent Patent Attorney: Takuya Ohara
Claims (2)
合法にて導電性高分子のプレコート層を形成するととも
に、同プレコート層上に電解重合法により導電性高分子
からなる電解重合膜を積層し、同電解重合膜上に陰極導
電層を設けてなる固体電解コンデンサにおいて、上記プ
レコート層の重量を上記電解重合膜の重量と同等もしく
はそれ以下としたことを特徴とする固体電解コンデンサ
。(1) A pre-coat layer of conductive polymer is formed by chemical polymerization on the anode body with a chemical conversion film formed on the surface, and electropolymerization of conductive polymer is performed on the pre-coat layer by electrolytic polymerization. A solid electrolytic capacitor comprising laminated membranes and a cathode conductive layer provided on the electrolytic polymeric membrane, characterized in that the weight of the precoat layer is equal to or less than the weight of the electrolytic polymeric membrane. .
性高分子の総重量は２．０ｍｇ／ｃｍ＾２以下である請
求項１に記載の固体電解コンデンサ。(2) The solid electrolytic capacitor according to claim 1, wherein the total weight of the conductive polymer obtained by the chemical polymerization method and the electrolytic polymerization method is 2.0 mg/cm^2 or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12866790A JPH0423419A (en) | 1990-05-18 | 1990-05-18 | Solid electrolytic capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12866790A JPH0423419A (en) | 1990-05-18 | 1990-05-18 | Solid electrolytic capacitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0423419A true JPH0423419A (en) | 1992-01-27 |
Family
ID=14990467
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12866790A Pending JPH0423419A (en) | 1990-05-18 | 1990-05-18 | Solid electrolytic capacitor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0423419A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003109852A (en) * | 2001-09-28 | 2003-04-11 | Nippon Chemicon Corp | Solid electrolytic capacitor and its manufacturing method |
| US6897424B2 (en) | 2000-04-19 | 2005-05-24 | Fujitsu Limited | Controlling a laser to stop output in accordance with detection of output lights corresponding to channels |
-
1990
- 1990-05-18 JP JP12866790A patent/JPH0423419A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6897424B2 (en) | 2000-04-19 | 2005-05-24 | Fujitsu Limited | Controlling a laser to stop output in accordance with detection of output lights corresponding to channels |
| JP2003109852A (en) * | 2001-09-28 | 2003-04-11 | Nippon Chemicon Corp | Solid electrolytic capacitor and its manufacturing method |
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