JP3163152B2 - Electrolytic solution for electrolytic capacitors - Google Patents
Electrolytic solution for electrolytic capacitorsInfo
- Publication number
- JP3163152B2 JP3163152B2 JP07357192A JP7357192A JP3163152B2 JP 3163152 B2 JP3163152 B2 JP 3163152B2 JP 07357192 A JP07357192 A JP 07357192A JP 7357192 A JP7357192 A JP 7357192A JP 3163152 B2 JP3163152 B2 JP 3163152B2
- Authority
- JP
- Japan
- Prior art keywords
- electrolytic
- electrolytic solution
- quaternary salt
- present
- solution
- 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 - Fee Related
Links
Landscapes
- Electric Double-Layer Capacitors Or The Like (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION
【０００１】[0001]
【産業上の利用分野】本発明は、電解コンデンサの電解
液に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrolytic solution for an electrolytic capacitor.
【０００２】[0002]
【従来の技術】従来より低圧用電解コンデンサの電解液
としては、エチレングリコ−ルを主溶媒として、アジピ
ン酸塩を溶解した電解液が多用されていたが、近年、電
解コンデンサの低インピ−ダンス化、高信頼化への対応
に伴い、γ−ブチロラクトンを主溶媒として、フタル酸
のテトラエチルアンモニウム塩を溶解した電解液が一般
的に使用されている。2. Description of the Related Art Conventionally, as an electrolytic solution of an electrolytic capacitor for low pressure, an electrolytic solution in which adipate is dissolved using ethylene glycol as a main solvent has been frequently used. In response to the demand for high reliability and high reliability, an electrolytic solution containing γ-butyrolactone as a main solvent and a tetraethylammonium phthalate dissolved therein is generally used.
【０００３】[0003]
【発明が解決しようとする課題】電解コンデンサの電解
液として、γ−ブチロラクトンへフタル酸のテトラエチ
ルアンモニウム塩を溶解したものは、従来の３級アミン
等を用いた電解液に比べれば大幅に信頼性が向上してい
るものの、１３０℃を超える雰囲気温度中においては極
度な信頼性の低下を生じてしまう。また、１００℃前後
の雰囲気温度中においても、電解液中水分量が数％増加
するだけで信頼性の低下を生じてしまう。これは、フタ
ル酸とテトラエチルアンモニウムイオン中のエチル基の
反応による物質生成が促進されることにより発生するた
め、根本的な対策を必要としていた。As an electrolytic solution for an electrolytic capacitor, a solution obtained by dissolving a tetraethylammonium salt of phthalic acid in γ-butyrolactone is significantly more reliable than an electrolytic solution using a conventional tertiary amine or the like. However, in an atmosphere temperature exceeding 130 ° C., an extreme decrease in reliability occurs. In addition, even at an ambient temperature of about 100 ° C., a decrease in the reliability is caused only by an increase in the water content of the electrolytic solution by a few percent. Since this is caused by promoting the generation of a substance by the reaction between phthalic acid and the ethyl group in the tetraethylammonium ion, a fundamental measure has been required.
【０００４】[0004]
【課題を解決するための手段】本発明は上述の問題点を
解決するもので、高温度雰囲気中においても信頼性の低
下を防止するものである。すなわち、γ−ブチロラクト
ンを主溶媒として、カチオン種が下記の構造式１あるい
は構造式２で示されるフタル酸の４級塩あるいは同構造
式で示されるマレイン酸の４級塩を溶解したことを特徴
とする電解液である。SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to prevent a decrease in reliability even in a high-temperature atmosphere. That is, a quaternary salt of phthalic acid represented by the following structural formula 1 or 2 or a quaternary salt of maleic acid represented by the same structural formula is dissolved in γ-butyrolactone as a main solvent. Electrolyte solution.
【０００５】[0005]
【化２】 Embedded image
【０００６】[0006]
【作用】本発明に係わる電解液のカチオンは、構造式か
らも明らかなように、中心の窒素あるいはリン原子に配
位する４つの（アルキル）基が３次元的に結合している
ため、分子の切断が起こりにくく、カチオンとアニオン
の反応による電解液の劣化が生じない。The cation of the electrolytic solution according to the present invention is, as is clear from the structural formula, because four (alkyl) groups coordinated to the central nitrogen or phosphorus atom are three-dimensionally bonded. Is hardly cleaved and the electrolyte does not deteriorate due to the reaction between the cation and the anion.
【０００７】[0007]
【実施例】以下、本発明の実施例について説明する。表
１は、本発明の電解液として用いた溶質を示す。表２
は、本発明の電解液と従来の電解液の組成、比抵抗およ
び火花発生電圧についての比較例を示す。なお、表２中
電解液試料記号Ａ，Ｂは従来例、Ｃ，Ｄ，Ｅ，Ｆ，Ｇ，
Ｈは本発明例であり、また、ＧＢＬはγ−ブチロラクト
ンである。表３は、表２に示す電解液を用いてコンデン
サ素子に含浸し試作した、定格２５Ｖ／３３００μＦの
電解コンデンサによる、１５０℃雰囲気中において１０
００時間の高温負荷試験を行なった結果を示す。Embodiments of the present invention will be described below. Table 1 shows the solutes used as the electrolyte of the present invention. Table 2
Shows a comparative example of the composition, specific resistance and spark generation voltage of the electrolytic solution of the present invention and the conventional electrolytic solution. The electrolyte sample symbols A and B in Table 2 are conventional examples, and C, D, E, F, G,
H is an example of the present invention, and GBL is γ-butyrolactone. Table 3 shows that the capacitor element was impregnated with the electrolytic solution shown in Table 2 and manufactured on a trial basis.
The result of performing the high-temperature load test for 00 hours is shown.
【０００８】[0008]
【表１】 [Table 1]
【０００９】[0009]
【表２】 [Table 2]
【００１０】[0010]
【表３】 [Table 3]
【００１１】表３から明らかなように、本発明に係わる
試料記号Ｃ，Ｄ，Ｅ，Ｆ，Ｇ，Ｈの電解液を用いた電解
コンデンサは、長時間の高温雰囲気中における試験にお
いても全ての特性に問題がない。なお、混合溶媒１００
ｇに対し３ｇ未満では発明の効果が得られず、また、３
０ｇを越えた場合は溶質の析出がみられる。As is clear from Table 3, the electrolytic capacitors using the electrolytes of the sample symbols C, D, E, F, G and H according to the present invention can be used in all tests in a high-temperature atmosphere for a long time. There is no problem in characteristics. The mixed solvent 100
If the amount is less than 3 g, the effect of the invention cannot be obtained.
If it exceeds 0 g, solute precipitation is observed.
【００１２】[0012]
【発明の効果】以上のように、本発明に係る電解液は、
低比抵抗ながら、高温雰囲気中においても高い信頼性を
有し、工業的ならびに実用的価値の大なるものである。As described above, the electrolytic solution according to the present invention comprises:
Although having a low specific resistance, it has high reliability even in a high-temperature atmosphere, and has great industrial and practical value.
Claims (2)
チオン種が下記の構造式１あるいは構造式２で示される
フタル酸の４級塩あるいは同構造式で示されるマレイン
酸の４級塩を溶解したことを特徴とする電解コンデンサ
の電解液。 【化１】 1. A quaternary salt of phthalic acid or a quaternary salt of maleic acid having a cationic species represented by the following structural formula 1 or 2 dissolved in γ-butyrolactone as a main solvent. An electrolytic solution for an electrolytic capacitor, characterized in that: Embedded image
酸の４級塩は、混合溶媒１００ｇに対し３〜３０ｇ存在
することを特徴とする請求項１記載の電解コンデンサの
電解液。2. The electrolytic solution for an electrolytic capacitor according to claim 1, wherein the quaternary salt of phthalic acid or the quaternary salt of maleic acid is present in an amount of 3 to 30 g per 100 g of the mixed solvent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP07357192A JP3163152B2 (en) | 1992-02-24 | 1992-02-24 | Electrolytic solution for electrolytic capacitors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP07357192A JP3163152B2 (en) | 1992-02-24 | 1992-02-24 | Electrolytic solution for electrolytic capacitors |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05234818A JPH05234818A (en) | 1993-09-10 |
| JP3163152B2 true JP3163152B2 (en) | 2001-05-08 |
Family
ID=13522102
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP07357192A Expired - Fee Related JP3163152B2 (en) | 1992-02-24 | 1992-02-24 | Electrolytic solution for electrolytic capacitors |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3163152B2 (en) |
-
1992
- 1992-02-24 JP JP07357192A patent/JP3163152B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05234818A (en) | 1993-09-10 |
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