JPH06232007A - Electrolyte for driving aluminum electrolytic capacitor - Google Patents
Electrolyte for driving aluminum electrolytic capacitorInfo
- Publication number
- JPH06232007A JPH06232007A JP3283693A JP3283693A JPH06232007A JP H06232007 A JPH06232007 A JP H06232007A JP 3283693 A JP3283693 A JP 3283693A JP 3283693 A JP3283693 A JP 3283693A JP H06232007 A JPH06232007 A JP H06232007A
- Authority
- JP
- Japan
- Prior art keywords
- electrolyte
- electrolytic solution
- electrolytic capacitor
- driving
- salt
- 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
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- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明はアルミニウム電解コンデ
ンサ駆動用電解液に関し、さらに詳しく言えば、有機極
性溶液を主溶媒とし、有機酸の３級アミン塩を溶質とす
るアルミニウム電解コンデンサ駆動用電解液に関するも
のである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrolytic solution for driving an aluminum electrolytic capacitor, and more specifically, an electrolytic solution for driving an aluminum electrolytic capacitor which uses an organic polar solution as a main solvent and a tertiary amine salt of an organic acid as a solute. It is about.
【０００２】[0002]
【従来の技術】電解液は実質的に誘電体である電極箔の
酸化皮膜層に接し、真の陰極として機能する。このた
め、電解液自身の電導率が電解コンデンサ自体の電気的
特性に直接影響を及ぼし、高性能の電解コンデンサを得
るには、優れた特性の電解液を用いることが不可欠の条
件とされている。2. Description of the Related Art An electrolytic solution comes into contact with an oxide film layer of an electrode foil which is substantially a dielectric and functions as a true cathode. Therefore, the conductivity of the electrolytic solution itself directly affects the electrical characteristics of the electrolytic capacitor itself, and in order to obtain a high-performance electrolytic capacitor, it is essential to use an electrolytic solution with excellent characteristics. .
【０００３】そこで、その好適な電解液として、フタル
酸トリエチルアミン塩を有機極性溶媒に溶解した電解液
が検討されている。Therefore, as a suitable electrolytic solution, an electrolytic solution in which a triethylamine phthalate salt is dissolved in an organic polar solvent has been investigated.
【０００４】[0004]
【発明が解決しようとする課題】フタル酸トリエチルア
ミン塩は高い電導率を示し、また、合成も容易である
が、有機極性溶媒に対する溶解性および酸化皮膜に対す
る修復能力がともに低く、これが実用上での問題とされ
ている。The triethylamine phthalate salt has a high electric conductivity and is easy to synthesize, but it has low solubility in an organic polar solvent and low ability to repair an oxide film. It is a problem.
【０００５】[0005]
【課題を解決するための手段】本発明は上記従来の事情
に鑑みなされたもので、その構成上の特徴は、有機極性
溶液を溶媒とし、有機酸の３級アミン塩を溶質とするア
ルミニウム電解コンデンサ駆動用電解液において、フタ
ル酸トリメチルアミン塩を電解質とし、かつ、ｐ−ニト
ロ安息香酸を添加したことにある。SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional circumstances, and its structural feature is that aluminum electrolysis uses an organic polar solution as a solvent and a tertiary amine salt of an organic acid as a solute. This is because trimethylamine phthalate salt was used as an electrolyte and p-nitrobenzoic acid was added to the electrolytic solution for driving the capacitor.
【０００６】この場合、上記有機極性溶媒はγ−ブチロ
ラクトン、γ−バレロラクトンよりなる群から選択され
ることが好ましい。また、上記ｐ−ニトロ安息香酸の添
加量は０．０５〜３ｗｔ％であることが好ましい。な
お、同添加量が０．０５ｗｔ％未満の場合には効果が見
られず、他方、３ｗｔ％を越えると火花発生電圧が著し
く低下する。In this case, the organic polar solvent is preferably selected from the group consisting of γ-butyrolactone and γ-valerolactone. The amount of p-nitrobenzoic acid added is preferably 0.05 to 3 wt%. If the amount added is less than 0.05 wt%, no effect is seen, while if it exceeds 3 wt%, the spark generation voltage drops significantly.
【０００７】なお、フタル酸トリメチルアミン塩として
は、ｏ−フタル酸トリメチルアミン塩が一般的である
が、この他に例えばｍ−フタル酸トリメチルアミン塩や
ｐ−フタル酸トリメチルアミン塩なども使用可能であ
る。As the trimethylamine phthalate salt, o-phthalic acid trimethylamine salt is generally used, but in addition to this, for example, m-phthalic acid trimethylamine salt or p-phthalic acid trimethylamine salt can be used.
【０００８】[0008]
【作用】電解質としてフタル酸トリメチルアミン塩を用
いることにより、有機極性溶媒に対する溶解性が高めら
れ、したがって高い電導度が得られる。By using trimethylamine phthalate as an electrolyte, the solubility in an organic polar solvent is enhanced, and thus high conductivity can be obtained.
【０００９】また、ｐ−ニトロ安息香酸を添加すること
により、コンデンサ性能、特に高周波インピーダンス特
性が改善される。Further, the addition of p-nitrobenzoic acid improves the capacitor performance, especially the high frequency impedance characteristic.
【００１０】[0010]
【実施例】まず、電解液自体についての本発明の実施例
および従来例に関し、その電気伝導度（μＳ／ｃｍ）と
火花発生電圧（Ｖ）を測定した。なお、電気伝導度は４
０℃、火花発生電圧は８５℃のものである。EXAMPLES First, the electrical conductivity (μS / cm) and the spark generation voltage (V) of the example of the present invention and the conventional example of the electrolytic solution were measured. The electrical conductivity is 4
0 ° C, spark generation voltage is 85 ° C.
【００１１】〈従来例１〉 電解液組成；ｏ−フタル酸トリエチルアミン塩２０ｗｔ
％、水０．５ｗｔ％、γ−ブチロラクトン７９．５ｗｔ
％。電気伝導度は４３００μＳ／ｃｍ、火花発生電圧は
６３Ｖであった。<Prior art example 1> Electrolyte composition: o-phthalic acid triethylamine salt 20 wt
%, Water 0.5 wt%, γ-butyrolactone 79.5 wt
%. The electrical conductivity was 4300 μS / cm, and the spark generation voltage was 63V.
【００１２】〈従来例２〉 電解液組成；ｏ−フタル酸トリエチルアミン塩２０ｗｔ
％、ｐ−ニトロ安息香酸１ｗｔ％、γ−ブチロラクトン
６３ｗｔ％、エチレングリコール１６ｗｔ％。電気伝導
度は７５００μＳ／ｃｍ、火花発生電圧は６０Ｖであっ
た。<Prior art example 2> Electrolyte composition: o-phthalic acid triethylamine salt 20 wt
%, P-nitrobenzoic acid 1 wt%, γ-butyrolactone 63 wt%, ethylene glycol 16 wt%. The electrical conductivity was 7500 μS / cm, and the spark generation voltage was 60V.
【００１３】《実施例１》 電解液組成；ｏ−フタル酸トリメチルアミン塩２４ｗｔ
％、水０．５ｗｔ％、γ−ブチロラクトン７５ｗｔ％、
ｐ−ニトロ安息香酸０．５ｗｔ％。電気伝導度は７２０
０μＳ／ｃｍ、火花発生電圧は７８Ｖであった。Example 1 Electrolyte composition: o-phthalic acid trimethylamine salt 24 wt
%, Water 0.5 wt%, γ-butyrolactone 75 wt%,
0.5 wt% of p-nitrobenzoic acid. Electric conductivity is 720
0 μS / cm, spark generation voltage was 78V.
【００１４】《実施例２》 電解液組成；ｏ−フタル酸トリメチルアミン塩２４ｗｔ
％、ｐ−ニトロ安息香酸１ｗｔ％、γ−ブチロラクトン
６０ｗｔ％、エチレングリコール１５ｗｔ％。電気伝導
度は１００００μＳ／ｃｍ、火花発生電圧は７５Ｖであ
った。Example 2 Electrolyte composition: 24 wt% o-phthalic acid trimethylamine salt
%, P-nitrobenzoic acid 1 wt%, γ-butyrolactone 60 wt%, ethylene glycol 15 wt%. The electric conductivity was 10,000 μS / cm, and the spark generation voltage was 75V.
【００１５】《実施例３》 電解液組成；ｏ−フタル酸トリメチルアミン塩２５ｗｔ
％、ｐ−ニトロ安息香酸０．５ｗｔ％、水０．５ｗｔ
％、γ−ブチロラクトン３７ｗｔ％、γ−バレロラクト
ン３７ｗｔ％。電気伝導度は９０００μＳ／ｃｍ、火花
発生電圧は７２Ｖであった。Example 3 Electrolyte composition: 25 wt% o-phthalic acid trimethylamine salt
%, P-nitrobenzoic acid 0.5 wt%, water 0.5 wt
%, Γ-butyrolactone 37% by weight, γ-valerolactone 37% by weight. The electric conductivity was 9000 μS / cm, and the spark generation voltage was 72V.
【００１６】このように、ｏ−フタル酸トリメチルアミ
ン塩は溶解性が高く、有機極性溶媒を主体とする溶媒中
で高い電導度を有する電解質であることが分かる。な
お、比較を容易にするため、従来例１，２と実施例１〜
３の電気伝導度と火花発生電圧を表１に示す。As described above, it is understood that the o-phthalic acid trimethylamine salt is an electrolyte having a high solubility and a high conductivity in a solvent mainly composed of an organic polar solvent. In order to facilitate the comparison, the conventional examples 1 and 2 and the example 1
Table 1 shows the electrical conductivity and the spark generation voltage of Sample No. 3.
【００１７】[0017]
【表１】 [Table 1]
【００１８】次に、上記従来例１，２および実施例１〜
３による電解液を用いて、定格６３Ｖ１８００μＦ（製
品サイズ；直径１８ｍｍ，軸長４０ｍｍ）のアルミニウ
ム電解コンデンサを各々２０個作製し、その漏れ電流値
（１分値の平均値；μＡ）を測定した。その結果を表２
に示すが、ｏ−フタル酸トリメチルアミン塩は、誘電体
としての酸化皮膜の修復能力に優れており、製品の漏れ
電流値がきわめて小さく抑えられる。Next, the above-mentioned conventional examples 1 and 2 and examples 1-
Using the electrolytic solution according to No. 3, 20 aluminum electrolytic capacitors each having a rating of 63V 1800 μF (product size; diameter 18 mm, axial length 40 mm) were produced, and the leakage current value (average value of 1 minute value: μA) was measured. The results are shown in Table 2.
As shown in Table 1, the o-phthalic acid trimethylamine salt has an excellent ability to repair an oxide film as a dielectric, and the leakage current value of the product can be suppressed to an extremely small value.
【００１９】[0019]
【表２】 [Table 2]
【００２０】また、ｐ−ニトロ安息香酸の添加による効
果を調べるため、次の比較例１，２および実施例４，５
による電解液を用いて、定格５０Ｖ１０００μＦ（製品
サイズ；直径１２．５ｍｍ，軸長４０ｍｍ）のアルミニ
ウム電解コンデンサを各々２０個試作し、その電気伝導
度（μＳ／ｃｍ）、静電容量（μＦ）および１００ｋＨ
ｚ時のインピーダンス（Ω）をそれぞれ測定した（いず
れも平均値）。Further, in order to investigate the effect of adding p-nitrobenzoic acid, the following Comparative Examples 1 and 2 and Examples 4 and 5 were conducted.
20 electrolytic electrolytic capacitors each having a rated voltage of 50 V and 1000 μF (product size; diameter 12.5 mm, axial length 40 mm) were made by trial using the electrolytic solution according to, and their electrical conductivity (μS / cm), capacitance (μF) and 100kH
The impedance (Ω) at z was measured (all are average values).
【００２１】〈比較例１〉ｐ−ニトロ安息香酸添加なし 電解液組成；ｏ−フタル酸トリメチルアミン塩２２ｗｔ
％、γ−ブチロラクトン３９ｗｔ％、γ−バレロラクト
ン３９ｗｔ％。 電気伝導度は８０００μＳ／ｃｍ、静電容量は１０２０
μＦおよびインピーダンスは０．０３４Ωであった。<Comparative Example 1> No p-nitrobenzoic acid added Electrolyte composition: o-phthalic acid trimethylamine salt 22 wt.
%, Γ-butyrolactone 39 wt%, γ-valerolactone 39 wt%. Electric conductivity is 8000 μS / cm, capacitance is 1020
The μF and impedance were 0.034Ω.
【００２２】《実施例４》ｐ−ニトロ安息香酸添加あり 電解液組成；ｏ−フタル酸トリメチルアミン塩２２ｗｔ
％、ｐ−ニトロ安息香酸２ｗｔ％、γ−ブチロラクトン
３８ｗｔ％、γ−バレロラクトン３８ｗｔ％。 電気伝導度は７８００μＳ／ｃｍ、静電容量は１０１８
μＦおよびインピーダンスは０．０２８Ωであった。Example 4 With p-nitrobenzoic acid added Electrolyte composition: o-phthalic acid trimethylamine salt 22 wt
%, P-nitrobenzoic acid 2 wt%, γ-butyrolactone 38 wt%, γ-valerolactone 38 wt%. Electric conductivity is 7800 μS / cm, capacitance is 1018
The μF and impedance were 0.028Ω.
【００２３】〈比較例２〉ｐ−ニトロ安息香酸添加なし 電解液組成；ｏ−フタル酸トリメチルアミン塩２５ｗｔ
％、γ−ブチロラクトン６０ｗｔ％、エチレングリコー
ル１５ｗｔ％。 電気伝導度は１０５００μＳ／ｃｍ、静電容量は１０２
２μＦおよびインピーダンスは０．０２６Ωであった。<Comparative Example 2> No p-nitrobenzoic acid added Electrolyte composition: 25 wt% o-phthalic acid trimethylamine salt
%, Γ-butyrolactone 60 wt%, ethylene glycol 15 wt%. Electric conductivity is 10500 μS / cm, capacitance is 102
2 μF and impedance was 0.026Ω.
【００２４】《実施例５》ｐ−ニトロ安息香酸添加あり 電解液組成；ｏ−フタル酸トリメチルアミン塩２５ｗｔ
％、ｐ−ニトロ安息香酸１ｗｔ％、γ−ブチロラクトン
５９ｗｔ％、エチレングリコール１５ｗｔ％。電気伝導
度は９８００μＳ／ｃｍ、静電容量は１０２４μＦおよ
びインピーダンスは０．０２０Ωであった。Example 5 With addition of p-nitrobenzoic acid Electrolyte composition: 25 wt% o-phthalic acid trimethylamine salt
%, P-nitrobenzoic acid 1 wt%, γ-butyrolactone 59 wt%, ethylene glycol 15 wt%. The electrical conductivity was 9800 μS / cm, the capacitance was 1024 μF, and the impedance was 0.020 Ω.
【００２５】この結果を表３に示すが、このことからｐ
−ニトロ安息香酸を添加することにより、電解液電導度
はほぼ同等にも拘らず、製品の高周波インピーダンス特
性が改善されることが分かった。The results are shown in Table 3. From this, p
It was found that the addition of -nitrobenzoic acid improves the high frequency impedance characteristics of the product, although the conductivity of the electrolyte is almost the same.
【００２６】[0026]
【表３】 [Table 3]
【００２７】[0027]
【発明の効果】以上説明したように、本発明によれば、
有機極性溶液を主溶媒とする溶媒中に電解質としてフタ
ル酸トリメチルアミン塩を含む電解液にｐ−ニトロ安息
香酸を添加することにより、電導度が高くしかも高周波
インピーダンス特性の改善が図れるアルミニウム電解コ
ンデンサ駆動用の電解液が得られる。As described above, according to the present invention,
By driving p-nitrobenzoic acid into an electrolytic solution containing trimethylamine phthalate as an electrolyte in a solvent containing an organic polar solution as a main solvent, aluminum electrolytic capacitors with high conductivity and improved high frequency impedance characteristics can be achieved. The electrolytic solution of is obtained.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 一杉 健一 神奈川県藤沢市辻堂新町２丁目２番１号 エルナー株式会社内 (72)発明者 田丸 敦巳 神奈川県藤沢市辻堂新町２丁目２番１号 エルナー株式会社内 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Kenichi Ichisugi 2-2-1 Tsujido Shinmachi, Fujisawa-shi, Kanagawa Elner Co., Ltd. (72) Inventor Atsumi Tamaru 2-2-1 Tsujido Shinmachi, Fujisawa-shi, Kanagawa Elner Co., Ltd.
Claims (3)
級アミン塩を溶質とするアルミニウム電解コンデンサ駆
動用電解液において、フタル酸トリメチルアミン塩を電
解質とし、かつ、ｐ−ニトロ安息香酸を添加したことを
特徴とするアルミニウム電解コンデンサ駆動用電解液。1. An organic polar solution is used as a main solvent, and an organic acid of 3
An electrolytic solution for driving an aluminum electrolytic capacitor, wherein a trimethylamine phthalate salt is used as an electrolyte and p-nitrobenzoic acid is added to an electrolytic solution for driving an aluminum electrolytic capacitor containing a primary amine salt as a solute.
ン、γ−バレロラクトンよりなる群から選択されること
を特徴とする請求項１に記載のアルミニウム電解コンデ
ンサ駆動用電解液。2. The electrolytic solution for driving an aluminum electrolytic capacitor according to claim 1, wherein the organic polar solvent is selected from the group consisting of γ-butyrolactone and γ-valerolactone.
０５〜３ｗｔ％であることを特徴とする請求項１に記載
のアルミニウム電解コンデンサ駆動用電解液。3. The amount of p-nitrobenzoic acid added is 0.
The electrolytic solution for driving an aluminum electrolytic capacitor according to claim 1, wherein the electrolytic solution is 05 to 3 wt%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3283693A JPH06232007A (en) | 1993-01-28 | 1993-01-28 | Electrolyte for driving aluminum electrolytic capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3283693A JPH06232007A (en) | 1993-01-28 | 1993-01-28 | Electrolyte for driving aluminum electrolytic capacitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06232007A true JPH06232007A (en) | 1994-08-19 |
Family
ID=12369907
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3283693A Pending JPH06232007A (en) | 1993-01-28 | 1993-01-28 | Electrolyte for driving aluminum electrolytic capacitor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06232007A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008300684A (en) * | 2007-05-31 | 2008-12-11 | Nichicon Corp | Electrolytic solution for driving electrolytic capacitor, and electrolytic capacitor |
-
1993
- 1993-01-28 JP JP3283693A patent/JPH06232007A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008300684A (en) * | 2007-05-31 | 2008-12-11 | Nichicon Corp | Electrolytic solution for driving electrolytic capacitor, and electrolytic capacitor |
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