JP3310684B2 - Electrolytic solution for electrolytic capacitors - Google Patents
Electrolytic solution for electrolytic capacitorsInfo
- Publication number
- JP3310684B2 JP3310684B2 JP03857192A JP3857192A JP3310684B2 JP 3310684 B2 JP3310684 B2 JP 3310684B2 JP 03857192 A JP03857192 A JP 03857192A JP 3857192 A JP3857192 A JP 3857192A JP 3310684 B2 JP3310684 B2 JP 3310684B2
- Authority
- JP
- Japan
- Prior art keywords
- electrolytic
- solution
- electrolytic solution
- dissolved
- electrolytic capacitor
- 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)
- Compositions Of Macromolecular Compounds (AREA)
Description
【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
あるいはマレイン酸のテトラアルキ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 in which γ-butyrolactone is used as a main solvent and a tetraalkylammonium salt of phthalic acid or maleic acid is dissolved 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、比抵抗値として９
０Ω・ cm程度まで可能であり、また、高温雰囲気中にお
ける信頼性も非常に高いものの、耐電圧が非常に低いた
め、定格５０Ｖ品への適用が限度であった。また、マレ
イン酸のテトラエチルアンモニウム塩を溶解したもの
は、比抵抗値としては７０Ω・ cmが可能な反面、耐電圧
はさらに低下して、定格３５Ｖ品への適用が限度である
ため、高い定格電圧においても低インピ−ダンス・高信
頼性を有する製品の開発が強く求められていた。As an electrolytic solution for an electrolytic capacitor, a solution of tetraethylammonium phthalate in γ-butyrolactone has a specific resistance of 9%.
Although it is possible to achieve a resistance of about 0 Ω · cm and the reliability in a high-temperature atmosphere is very high, the withstand voltage is very low, so that application to a rated 50 V product has been limited. In addition, a solution of maleic acid tetraethylammonium salt can have a specific resistance value of 70 Ω · cm, but the withstand voltage is further reduced, and application to a rated 35 V product is limited. Therefore, there has been a strong demand for the development of a product having low impedance and high reliability.
【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、低比抵抗ながら高い耐電圧を有する電
解液である。すなわち、γ−ブチロラクトンを主溶媒と
して、フタル酸のテトラアルキルアンモニウム塩あるい
はマレイン酸のテトラアルキルアンモニウム塩を溶解し
た溶液に下記の構造式で表される分子内に１つ以上の水
酸基を有するリン化合物を溶解したことを特徴とする電
解コンデンサの電解液である。SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems and provides an electrolyte having a high withstand voltage while having a low specific resistance. That is, a phosphorus compound having one or more hydroxyl groups in a molecule represented by the following structural formula in a solution in which a tetraalkylammonium salt of phthalic acid or a tetraalkylammonium salt of maleic acid is dissolved using γ-butyrolactone as a main solvent. Is dissolved in the electrolytic solution of the electrolytic capacitor.
【化２】 Embedded image
【０００５】[0005]
【作用】本発明の電解液は、添加したリン化合物が電極
箔と強固な不溶性皮膜を形成することにより、漏れ電流
の集中等による化成皮膜の破壊を防止することにより、
製品のショ−トパンクの発生を無くし、高い定格電圧ま
での適用を可能とする。The electrolytic solution of the present invention is characterized in that the added phosphorus compound forms a strong insoluble film with the electrode foil, thereby preventing the chemical conversion film from being destroyed due to concentration of leakage current, etc.
Eliminates the occurrence of short punctures in products and enables application up to a high rated voltage.
【０００６】[0006]
【実施例】以下、本発明の実施例について説明する。表
１は、溶質量２０重量％の際の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１中電解液試料記号Ａ，Ｂは従来
例、Ｃ〜Ｈは上記構造式をもつ亜リン酸，フェニルホス
ホン酸，２−カルボキシエチルホスホン酸を溶解した電
解液の本発明例であり、また、記号ＧＢＬはγ−ブチロ
ラクトンを示す。Embodiments of the present invention will be described below. Table 1 shows a comparative example of the composition, specific resistance, and spark generation voltage of the electrolytic solution of the present invention and a conventional electrolytic solution at a dissolved mass of 20% by weight. In Table 1, electrolyte sample symbols A and B are conventional examples, and C to H are examples of the present invention of an electrolyte solution in which phosphorous acid, phenylphosphonic acid, or 2-carboxyethylphosphonic acid having the above structural formula is dissolved. , And the symbol GBL indicates γ-butyrolactone.
【０００７】[0007]
【表１】 [Table 1]
【０００８】表２は、表１に示す電解液を用いて試作し
た定格６３Ｖ １０００μＦの電解コンデンサによる１
０５℃雰囲気中における２０００時間の高温負荷試験を
行なった結果を示す。[0008] Table 2 shows the results obtained by using an electrolytic capacitor having a rated voltage of 63 V and a rating of 1000 µF, which was prototyped using the electrolytic solution shown in Table 1.
The result of performing a high-temperature load test for 2000 hours in an atmosphere of 05 ° C. is shown.
【０００９】[0009]
【表２】 [Table 2]
【００１０】表２から明らかなように、本発明に係わる
試料記号Ｃ〜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１００ｇに対し０．０５
ｇ未満では電解液の耐電圧向上が不可能であり、また、
５ｇを越えた場合は析出がみられる。また、今回の実施
例以外のリン化合物についても評価を行ったが、同様な
結果が得られた。As is clear from Table 2, the electrolytic capacitors using the electrolytes of sample symbols C to H according to the present invention have no problem in all characteristics even in a long-time test in a high-temperature atmosphere. In addition, 0.05 g to 100 g of the mixed solvent.
If it is less than g, it is impossible to improve the withstand voltage of the electrolytic solution.
If it exceeds 5 g, precipitation is observed. In addition, although phosphorus compounds other than the present example were evaluated, similar results were obtained.
【００１１】[0011]
【発明の効果】以上のように、γ−ブチロラクトンを主
溶媒として、フタル酸のテトラアルキルアンモニウム塩
あるいはマレイン酸のテトラアルキルアンモニウム塩を
溶解した溶液に、分子内に１つ以上の水酸基を有するリ
ン化合物を溶解したことを特徴とする電解コンデンサの
電解液は、低比抵抗ながら高い耐電圧を有し、工業的な
らびに実用的価値の大なるものである。As described above, a solution containing one or more hydroxyl groups in the molecule is prepared by dissolving a tetraalkylammonium salt of phthalic acid or a tetraalkylammonium salt of maleic acid using γ-butyrolactone as a main solvent. An electrolytic solution of an electrolytic capacitor characterized by dissolving a compound has high withstand voltage despite low specific resistance, and has great industrial and practical value.
Claims (2)
タル酸のテトラアルキルアンモニウム塩あるいはマレイ
ン酸のテトラアルキルアンモニウム塩を溶解した溶液
に、下記の構造式で表わされる分子内に１つ以上の水酸
基を有するリン化合物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 solution in which γ-butyrolactone is used as a main solvent and a tetraalkylammonium salt of phthalic acid or maleic acid is dissolved in a solution of one or more hydroxyl groups in a molecule represented by the following structural formula. An electrolytic solution for an electrolytic capacitor, comprising a phosphorus compound dissolved therein. Embedded image
重量％であ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 addition amount of the phosphorus compound is 0.05 to 5
2. The electrolytic solution for an electrolytic capacitor according to claim 1, wherein the amount is% by weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03857192A JP3310684B2 (en) | 1992-01-28 | 1992-01-28 | Electrolytic solution for electrolytic capacitors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03857192A JP3310684B2 (en) | 1992-01-28 | 1992-01-28 | Electrolytic solution for electrolytic capacitors |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07192975A JPH07192975A (en) | 1995-07-28 |
| JP3310684B2 true JP3310684B2 (en) | 2002-08-05 |
Family
ID=12528984
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP03857192A Expired - Fee Related JP3310684B2 (en) | 1992-01-28 | 1992-01-28 | Electrolytic solution for electrolytic capacitors |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3310684B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2096200A1 (en) | 2008-02-27 | 2009-09-02 | Groz-Beckert KG | Transfer needle with internal spring tip |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0246714A (en) * | 1988-08-09 | 1990-02-16 | Mitsubishi Petrochem Co Ltd | Electrolyte for electrolytic capacitor |
| JPH03209810A (en) * | 1990-01-12 | 1991-09-12 | Elna Co Ltd | Electrolyte for driving electrolytic capacitor |
-
1992
- 1992-01-28 JP JP03857192A patent/JP3310684B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2096200A1 (en) | 2008-02-27 | 2009-09-02 | Groz-Beckert KG | Transfer needle with internal spring tip |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07192975A (en) | 1995-07-28 |
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