JPS63261825A - Electrolyte for driving electrolytic capacitor - Google Patents
Electrolyte for driving electrolytic capacitorInfo
- Publication number
- JPS63261825A JPS63261825A JP9659387A JP9659387A JPS63261825A JP S63261825 A JPS63261825 A JP S63261825A JP 9659387 A JP9659387 A JP 9659387A JP 9659387 A JP9659387 A JP 9659387A JP S63261825 A JPS63261825 A JP S63261825A
- Authority
- JP
- Japan
- Prior art keywords
- electrolytic capacitor
- butyrolactone
- electrolytic solution
- weight
- driving
- 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 description 16
- 239000003792 electrolyte Substances 0.000 title description 10
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 claims description 30
- YEJRWHAVMIAJKC-UHFFFAOYSA-N 4-Butyrolactone Chemical compound O=C1CCCO1 YEJRWHAVMIAJKC-UHFFFAOYSA-N 0.000 claims description 26
- 239000008151 electrolyte solution Substances 0.000 claims description 14
- 239000012046 mixed solvent Substances 0.000 claims description 8
- XNGIFLGASWRNHJ-UHFFFAOYSA-N phthalic acid Chemical compound OC(=O)C1=CC=CC=C1C(O)=O XNGIFLGASWRNHJ-UHFFFAOYSA-N 0.000 claims description 8
- 150000003242 quaternary ammonium salts Chemical class 0.000 claims description 6
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 claims description 4
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 claims description 4
- 239000011976 maleic acid Substances 0.000 claims description 4
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 claims description 4
- 150000001732 carboxylic acid derivatives Chemical class 0.000 claims description 3
- CBXCPBUEXACCNR-UHFFFAOYSA-N tetraethylammonium Chemical group CC[N+](CC)(CC)CC CBXCPBUEXACCNR-UHFFFAOYSA-N 0.000 claims description 2
- QEMXHQIAXOOASZ-UHFFFAOYSA-N tetramethylammonium Chemical class C[N+](C)(C)C QEMXHQIAXOOASZ-UHFFFAOYSA-N 0.000 claims description 2
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 6
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical class CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- 239000002904 solvent Substances 0.000 description 4
- OLKRIVQBFQVHRL-BTJKTKAUSA-M (z)-4-hydroxy-4-oxobut-2-enoate;tetraethylazanium Chemical compound OC(=O)\C=C/C([O-])=O.CC[N+](CC)(CC)CC OLKRIVQBFQVHRL-BTJKTKAUSA-M 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 150000001991 dicarboxylic acids Chemical class 0.000 description 2
- 238000010494 dissociation reaction Methods 0.000 description 2
- 230000005593 dissociations Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 150000002825 nitriles Chemical class 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- -1 amine salt Chemical class 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 229930188620 butyrolactone Natural products 0.000 description 1
- 150000001735 carboxylic acids Chemical class 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 230000005588 protonation Effects 0.000 description 1
- 150000005621 tetraalkylammonium salts Chemical class 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Electric Double-Layer Capacitors Or The Like (AREA)
- Primary Cells (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、電解コンデンサ駆動用電解液に関するもので
ある。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an electrolytic solution for driving an electrolytic capacitor.
従来の技術
従来、電解コンデンサ駆動用電解液としてエチレングリ
コールにイオノゲンを溶解した電解液が用いられている
。しかし、この種の電解液は、比電導度が低く、特に低
温においてはインピーダンス特性が大きく変化するとい
う欠点がある。そのため、水を添加して電導度を改善し
た電解液が使用されているが、このような電解液は、高
温中での蒸気圧が高く、また電極であるアルミニウムと
反応しやすいため、高温領域での使用に適さない。2. Description of the Related Art Conventionally, an electrolytic solution in which ionogen is dissolved in ethylene glycol has been used as an electrolytic solution for driving an electrolytic capacitor. However, this type of electrolytic solution has a drawback in that its specific conductivity is low and its impedance characteristics change significantly, especially at low temperatures. Therefore, electrolytes with improved conductivity by adding water are used, but such electrolytes have a high vapor pressure at high temperatures and easily react with the aluminum electrode, so they cannot be used in high-temperature regions. Not suitable for use in
以上のような欠点を改良するため、特開昭６１−７０７
１１号公報にみられるように、γ−ブチロラクトンを溶
媒とし、フタル酸のトリエチルアミン塩を用いる例や、
特開昭５４−７５６４号公報にみられるように、γ−ブ
チロラクトンとエチレングリコールの混合溶媒にマレイ
ン酸のアミン塩を用いる例がある。In order to improve the above-mentioned drawbacks, Japanese Patent Application Laid-Open No. 61-707
As seen in Publication No. 11, examples using γ-butyrolactone as a solvent and triethylamine salt of phthalic acid,
As seen in JP-A-54-7564, there is an example of using an amine salt of maleic acid in a mixed solvent of γ-butyrolactone and ethylene glycol.
また、特開昭５９−７８５２２号公報のように直鎖ジカ
ルボン酸の第４アンモニウム塩を用いた例、特開昭６１
−９３６１０号公報のように、１．１０−デカンジカル
ボン酸あるいは、１．６−デカンジカルボン酸のテトラ
アルキルアンモニウム塩を用いた例もある。しかし、こ
のような電解液では次に示すような欠点がある。In addition, examples using quaternary ammonium salts of linear dicarboxylic acids as in JP-A-59-78522, JP-A-61
There is also an example of using a tetraalkylammonium salt of 1.10-decanedicarboxylic acid or 1.6-decanedicarboxylic acid, as in Japanese Patent No. 93610. However, such electrolytes have the following drawbacks.
発明が解決しようとする問題点
つまり、従来の電解液では、溶媒にγ−ブチロラクトン
、溶質にフタル酸やマレイン酸のドーリエチルアミン塩
を用いた場合、酸解離がトリエチルアミンのプロトン化
解離で起こるため、イオン生成が少なく、比電導度が十
分に高くない。また、直鎖ジカルボン酸の第４アンモニ
ウム塩や１．１０−デカンジカルボン酸あるいは、１．
６−デカンジカルボン酸のテトラアルキルアンそニウム
塩を用いた場合、酸との組合せが悪いため、比電導度が
低く、これらの電解液を用いた電解コンデンサは。Problems to be Solved by the Invention In other words, in conventional electrolytes, when γ-butyrolactone is used as the solvent and doryethylamine salt of phthalic acid or maleic acid is used as the solute, acid dissociation occurs due to protonation dissociation of triethylamine. Ion generation is low and specific conductivity is not high enough. Also, quaternary ammonium salts of linear dicarboxylic acids, 1.10-decanedicarboxylic acids, or 1.
When a tetraalkylamsonium salt of 6-decanedicarboxylic acid is used, the specific conductivity is low due to poor combination with the acid, and electrolytic capacitors using these electrolytes have low specific conductivity.
インピーダンス特性を十分に低くすることができない欠
点があった。There was a drawback that the impedance characteristics could not be made sufficiently low.
本発明は、このような従来の欠点を解決するもので、高
電導度で低温におけるインピーダンス特性の改善と高温
での長寿命化を図ることを目的とする。The present invention solves these conventional drawbacks, and aims to improve impedance characteristics at low temperatures and extend life at high temperatures with high conductivity.
問題点を解決するだめの手段
上記問題点を解決するために、本発明は、溶媒としてγ
−ブチロラクトンとアセトニトリルの混合溶媒を用い、
溶質として、不飽和カルボン酸の四級アンモニウム塩を
用いる電解コンデンサ駆動用電解液である。不飽和カル
ボン酸のうち好ましくはフタル酸および／″または、マ
レイン酸であり、四級アンモニウム塩が、テトラエチル
アンモニウム塩および／またはテトラメチルアンモニウ
ム塩である。また、γ−ブチロラクトンとアセトニトリ
ルの混合割合は、γ−ブチロラクトンが９５〜２０５〜
２０重量％ニトリルが５〜８０重量％である。Means for Solving the Problems In order to solve the above problems, the present invention uses γ as a solvent.
- Using a mixed solvent of butyrolactone and acetonitrile,
This is an electrolytic solution for driving electrolytic capacitors that uses a quaternary ammonium salt of an unsaturated carboxylic acid as a solute. Among the unsaturated carboxylic acids, phthalic acid and/or maleic acid are preferred, and the quaternary ammonium salt is tetraethylammonium salt and/or tetramethylammonium salt.The mixing ratio of γ-butyrolactone and acetonitrile is , γ-butyrolactone is 95-205-
20% by weight nitrile is 5-80% by weight.
作用
このような本発明の電解液によれば、γ−ブチロラクト
ンとアセトニトリルの混合により、電解液の凝固点が低
下し、またγ−ブチロラクトンは混合溶媒の沸点を上昇
させ、アセトニ） ＩＪルは、混合溶媒の粘度を低下さ
せて、イオンを動きやすくし、広い温度域にわたり高電
導度が得られる。Effects According to the electrolytic solution of the present invention, the freezing point of the electrolytic solution is lowered by mixing γ-butyrolactone and acetonitrile, and γ-butyrolactone increases the boiling point of the mixed solvent. It lowers the viscosity of the solvent, making it easier for ions to move, and providing high conductivity over a wide temperature range.
本発明において、混合比をγ−ブチロラクトンが９５〜
２０５〜２０重量％ニトリルが５〜８０重量％としたの
は、アセトニトリルが５重量％未満では、比電導度が十
分高くなく、８０重量％を越える混合溶媒では、高温で
の安定性が悪いためである。In the present invention, the mixing ratio of γ-butyrolactone is 95 to
205 to 20% by weight Nitrile is set to 5 to 80% by weight because if the acetonitrile content is less than 5% by weight, the specific conductivity is not high enough, and if the mixed solvent exceeds 80% by weight, stability at high temperatures is poor. It is.
実施例 以下、本発明による実施例について述べる。Example Examples according to the present invention will be described below.
第１図に、γ−ブチロラクト／とアセトニトリルの混合
溶媒の混合比を変えた電解液の常温での電導度を示す。FIG. 1 shows the electrical conductivity at room temperature of electrolytic solutions with different mixing ratios of mixed solvents of γ-butyrolact/and acetonitrile.
なおこの時の溶質は２０重量％のマレイン酸モノテトラ
エチルアンモニウムおヨヒフタル酸モノテトラエチルア
ンモニウムである。The solute at this time was 20% by weight of monotetraethylammonium maleate and monotetraethylammonium isohyphthalate.
このようにγ−ブチロラクトンとアセトニトリルの混合
割合を変えることにより所定の電導度の電解液を得るこ
とができる。By changing the mixing ratio of γ-butyrolactone and acetonitrile in this manner, an electrolytic solution having a predetermined conductivity can be obtained.
表１に、γ−ブチロラクト／とアセトニトリルの重量比
が５０％：ｔｓｏ％の混合溶媒に、２０重量％のマレイ
ン酸モノテトラエチルアンモニウム。Table 1 shows 20% by weight of monotetraethylammonium maleate in a mixed solvent of γ-butyrolact/and acetonitrile in a weight ratio of 50%:tso%.
２０重量％の７タル酸モノテトラエチルアンモニウムお
よび１０重量％の７タル酸モノテトラメチルアンモニウ
ムをそれぞれ溶解させた時の常温における比電導度と従
来の電解液の比電導度を示す。The specific conductivity at room temperature and the specific conductivity of a conventional electrolytic solution are shown when 20% by weight monotetraethylammonium heptatalate and 10% by weight monotetramethylammonium heptalate are respectively dissolved.
（以下余白）
表１の従来例４と実施例１を見ても明らかなように、実
施例は従来例に比較して非常に高い電導度を得ることが
できる。(The following is a blank space) As is clear from Conventional Example 4 and Example 1 in Table 1, the Example can obtain a much higher conductivity than the Conventional Example.
表２に、表１の従来例１．従来例２．従来例３及び実施
例１．実施例２の電解液を用いたアルミ電解コンデンサ
の初期特性と１０５℃中における１０００時間後の寿命
試験の結果を示す。なお試料コンデンサは、６．３ｖ６
６０μＦ（φ８×１２Ｊ５）のアルミ電解コンデンサで
定格電圧印加試験である。Table 2 shows conventional example 1 in Table 1. Conventional example 2. Conventional Example 3 and Example 1. The initial characteristics of an aluminum electrolytic capacitor using the electrolyte of Example 2 and the results of a life test after 1000 hours at 105° C. are shown. The sample capacitor is 6.3v6
This is a rated voltage application test using a 60μF (φ8×12J5) aluminum electrolytic capacitor.
（以下余白）
表２の従来例３と従来例１を見ても明らかなように、実
施例は従来例と比較して−δ（１２０Ｈｚ）、インピー
ダンス（１ｏｏＫＩｌｚ）、ともに大巾に低くすること
ができる。また１０００時間後の従来例３と実施例１の
静電容量や従来例２と実施例２の−δを見ても明らかな
ように、高温中においては特性変化はきわめて小さく、
信頼性の高いコンデンサを得ることができる。(Left below) As is clear from Conventional Example 3 and Conventional Example 1 in Table 2, both -δ (120Hz) and impedance (1ooKIlz) are significantly lower in the embodiment than in the conventional example. Can be done. Furthermore, as is clear from the capacitance of Conventional Example 3 and Example 1 after 1000 hours and -δ of Conventional Example 2 and Example 2, the change in characteristics is extremely small at high temperatures.
A highly reliable capacitor can be obtained.
第２図に、従来例と実施例の低温におけるインピーダン
ス変化を示す。第２図の従来例３と実施例１を見ても明
らかなように、実施例は従来例に比較して、低温におけ
るインピーダンス変化がきわめて少ないコンデンサを得
ることができる。FIG. 2 shows impedance changes at low temperatures in the conventional example and the example. As is clear from prior art example 3 and example 1 in FIG. 2, the example can provide a capacitor with significantly less impedance change at low temperatures than the conventional example.
発明の効果
以上のように本発明によれば、従来の電解液と比較して
、大巾な比電導度の向上ができ、インピーダンス特性を
改善できる。しかも、広い温度域にわたりきわめて安定
な信頼性の高いコンデンサが提供でき、工業的価値の犬
なるものである。Effects of the Invention As described above, according to the present invention, compared to conventional electrolytes, specific conductivity can be greatly improved and impedance characteristics can be improved. Furthermore, it is possible to provide a highly reliable capacitor that is extremely stable over a wide temperature range, making it a dog of industrial value.
第１図は、γ−ブチロラクトンとアセトニトリル混合溶
媒の重量比に対する電導度の相関を示す特性図、第２図
は従来の電解液及び本発明電解液を用いた定格６．３Ｖ
５６０ μＦ （ｅｂ ８ Ｘ １２．５ ）のアル
ミ電解コンデンサの温度に対するインピーダンス特性の
変化を表わした特性図である。
代理人の氏名 弁理士 中 尾 敏 男 ほか１名第１
図
第２図
温度（Ｃ）Figure 1 is a characteristic diagram showing the correlation of electrical conductivity to the weight ratio of γ-butyrolactone and acetonitrile mixed solvent, and Figure 2 is a rated 6.3V using a conventional electrolyte and an electrolyte of the present invention.
FIG. 2 is a characteristic diagram showing changes in impedance characteristics of a 560 μF (eb 8 × 12.5) aluminum electrolytic capacitor with respect to temperature. Name of agent: Patent attorney Toshio Nakao and 1 other person 1st
Figure 2 Temperature (C)
Claims (4)
に不飽和カルボン酸の四級アンモニウム塩を溶質として
用いることを特徴とする電解コンデンサ駆動用電解液。(1) An electrolytic solution for driving an electrolytic capacitor, characterized in that a quaternary ammonium salt of an unsaturated carboxylic acid is used as a solute in a mixed solvent of γ-butyrolactone and acetonitrile.
レイン酸であることを特徴とする特許請求の範囲第１項
記載の電解コンデンサ駆動用電解液。(2) The electrolytic solution for driving an electrolytic capacitor according to claim 1, wherein the unsaturated carboxylic acid is phthalic acid and/or maleic acid.
ム塩および／またはテトラメチルアンモニウム塩である
ことを特徴とする特許請求の範囲第１項記載の電解コン
デンサ駆動用電解液。(3) The electrolytic solution for driving an electrolytic capacitor according to claim 1, wherein the quaternary ammonium salt is a tetraethylammonium salt and/or a tetramethylammonium salt.
ニトリルが５〜８０重量％で混合されていることを特徴
とする特許請求の範囲第１項記載の電解コンデンサ駆動
用電解液。(4) The electrolytic solution for driving an electrolytic capacitor according to claim 1, characterized in that 95 to 20% by weight of γ-butyrolactone and 5 to 80% by weight of acetonitrile are mixed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9659387A JPS63261825A (en) | 1987-04-20 | 1987-04-20 | Electrolyte for driving electrolytic capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9659387A JPS63261825A (en) | 1987-04-20 | 1987-04-20 | Electrolyte for driving electrolytic capacitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63261825A true JPS63261825A (en) | 1988-10-28 |
Family
ID=14169199
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9659387A Pending JPS63261825A (en) | 1987-04-20 | 1987-04-20 | Electrolyte for driving electrolytic capacitor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63261825A (en) |
-
1987
- 1987-04-20 JP JP9659387A patent/JPS63261825A/en active Pending
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