JPH09115779A - Electrolyte for driving electrolytic capacitor - Google Patents
Electrolyte for driving electrolytic capacitorInfo
- Publication number
- JPH09115779A JPH09115779A JP26823695A JP26823695A JPH09115779A JP H09115779 A JPH09115779 A JP H09115779A JP 26823695 A JP26823695 A JP 26823695A JP 26823695 A JP26823695 A JP 26823695A JP H09115779 A JPH09115779 A JP H09115779A
- Authority
- JP
- Japan
- Prior art keywords
- acid
- electrolyte
- electrolytic capacitor
- water
- triethyltetramine
- 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 20
- 239000003792 electrolyte Substances 0.000 title abstract description 8
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 14
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 claims abstract description 10
- WPYMKLBDIGXBTP-UHFFFAOYSA-N benzoic acid Chemical compound OC(=O)C1=CC=CC=C1 WPYMKLBDIGXBTP-UHFFFAOYSA-N 0.000 claims abstract description 10
- RAEOEMDZDMCHJA-UHFFFAOYSA-N 2-[2-[bis(carboxymethyl)amino]ethyl-[2-[2-[bis(carboxymethyl)amino]ethyl-(carboxymethyl)amino]ethyl]amino]acetic acid Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(=O)O)CCN(CCN(CC(O)=O)CC(O)=O)CC(O)=O RAEOEMDZDMCHJA-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000005711 Benzoic acid Substances 0.000 claims abstract description 5
- 239000001361 adipic acid Substances 0.000 claims abstract description 5
- 235000011037 adipic acid Nutrition 0.000 claims abstract description 5
- 235000010233 benzoic acid Nutrition 0.000 claims abstract description 5
- 150000001735 carboxylic acids Chemical class 0.000 claims abstract description 4
- 150000003839 salts Chemical class 0.000 claims abstract description 3
- 239000008151 electrolyte solution Substances 0.000 claims description 18
- 239000011877 solvent mixture Substances 0.000 claims 1
- 239000011888 foil Substances 0.000 abstract description 7
- 239000002904 solvent Substances 0.000 abstract description 4
- 238000006703 hydration reaction Methods 0.000 abstract description 3
- 239000002253 acid Substances 0.000 abstract 1
- 230000036571 hydration Effects 0.000 abstract 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 6
- 229910052782 aluminium Inorganic materials 0.000 description 6
- 238000005530 etching Methods 0.000 description 2
- 150000003863 ammonium salts Chemical class 0.000 description 1
- 238000007743 anodising Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
Landscapes
- Electric Double-Layer Capacitors Or The Like (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、電解コンデンサの駆動
用電解液（以下単に電解液と称する）の改良に関するも
のであり、優れた電導度を有し、高温で安定な電解液に
関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in an electrolytic solution for driving an electrolytic capacitor (hereinafter simply referred to as an electrolytic solution), and to an electrolytic solution having excellent electric conductivity and stable at high temperature. is there.
【０００２】[0002]
【従来の技術】一般に電解コンデンサは、高純度アルミ
ニウム箔をエッチングして表面積を増大させ、その表面
を陽極酸化して誘電体化した陽極箔と、この陽極箔と対
向するエッチングされた陰極箔との間に隔離紙を介在さ
せて巻回した構造の素子に電解液を含浸させ、ケースに
収納し、封口体により封口してなるものである。このよ
うな電解コンデンサにおいては、電解液の特性が電解コ
ンデンサの性能を決定する大きな要因となる。特に近年
の電解コンデンサの小型化に伴い、エッチング倍率の高
いものが使用されるようになり、コンデンサの抵抗率が
大きくなっていることから、これに用いる電解液として
は比抵抗の小さいものが常に要求される。従来の電解液
の中でコストも安く、比抵抗の低いものとしてはエチレ
ングリコ−ルを主溶媒としてこれに水を加え、さらに電
解質としてアジピン酸、安息香酸等のカルボン酸のアン
モニウム塩を溶解したものが使用されている。2. Description of the Related Art Generally, an electrolytic capacitor comprises an anode foil obtained by etching a high-purity aluminum foil to increase its surface area and anodizing the surface to make it a dielectric, and an etched cathode foil facing the anode foil. An element having a structure in which a separator paper is wound between the elements is impregnated with an electrolytic solution, housed in a case, and sealed with a sealing body. In such an electrolytic capacitor, the characteristics of the electrolytic solution are a major factor in determining the performance of the electrolytic capacitor. In particular, with the recent miniaturization of electrolytic capacitors, those with a high etching rate have come to be used, and the resistivity of capacitors has increased. Therefore, the electrolytic solution used for this must always have a low specific resistance. Required. Among the conventional electrolytes, the one with low cost and low specific resistance is ethylene glycol as the main solvent, water is added to this, and further ammonium salts of carboxylic acids such as adipic acid and benzoic acid are dissolved as electrolytes. Things are being used.
【０００３】[0003]
【発明が解決しようとする課題】しかし、このような電
解液は比抵抗を低下させることはできるものの水の添加
量が多い為、高温下では電解液中の水が電極箔と水和反
応してガスを発生させ、電解コンデンサの内圧を上昇さ
せるので１０５℃以上での使用は困難であった。However, although such an electrolytic solution can reduce the specific resistance, since the amount of water added is large, the water in the electrolytic solution undergoes a hydration reaction with the electrode foil at high temperatures. As a result, gas is generated and the internal pressure of the electrolytic capacitor rises, so it was difficult to use at 105 ° C or higher.
【０００４】[0004]
【課題を解決するための手段】本発明は、上述の課題を
解決するためエチレングリコ−ルと１０〜３０ｗｔ．％
の水とを混合した溶媒にアジピン酸、安息香酸のうち少
なくとも１種類の有機カルボン酸またはその塩を溶質と
して溶解させたものにトリエチルテトラミン六酢酸を
０．０１〜３．０ｗｔ．％添加したことを特徴とする。SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention comprises ethylene glycol and 10 to 30 wt. %
0.01 to 3.0 wt.% Of triethyltetramine hexaacetic acid is dissolved in a solvent prepared by mixing at least one organic carboxylic acid or its salt among adipic acid and benzoic acid in a solvent mixed with water. %.
【０００５】[0005]
【作用】トリエチルテトラミン六酢酸を添加することに
よって水の添加量が増加しても１０５℃の高温下での電
解液中の水と電極箔との水和反応が抑制され、ガス発生
が抑えられる。[Function] Even if the amount of water added is increased by adding triethyltetramine hexaacetic acid, the hydration reaction between water in the electrolytic solution and the electrode foil at a high temperature of 105 ° C. is suppressed, and gas generation is suppressed. .
【０００６】トリエチルテトラミン六酢酸の添加量を種
々検討した結果、０．０１〜３．０ｗｔ．％の範囲内で
良好であった。０．０１ｗｔ．％未満では抑制効果は現
れず、３．０ｗｔ．％を超えると析出してしまう。As a result of various studies on the amount of triethyltetramine hexaacetic acid added, 0.01 to 3.0 wt. It was good within the range of%. 0.01 wt. %, The suppression effect does not appear and 3.0 wt. If it exceeds%, it will precipitate.
【０００７】水の添加量は１０〜３０ｗｔ．％の範囲内
であり、１０ｗｔ．％未満では比抵抗が低くならず、３
０ｗｔ．％を超えるとトリエチルテトラミン六酢酸によ
る上記の効果が現れなくなる。The amount of water added is 10 to 30 wt. %, 10 wt. If it is less than%, the specific resistance does not decrease and it is 3
0 wt. If it exceeds%, the above effect due to triethyltetramine hexaacetic acid will not be exhibited.
【実施例】以下、本発明の実施例について説明する。表
１に本発明に係わる電解液（試料記号ａ，ｂ，ｃ，ｄ，
ｅ，ｆ，ｇ，ｈ，ｉ，ｊ）と比較のための従来の電解液
（試料記号Ａ，Ｂ，Ｃ，Ｄ）のそれぞれ電解液の組成
比、及び同電解液の３０℃における比抵抗を示す。Embodiments of the present invention will be described below. Table 1 shows the electrolytic solution according to the present invention (sample symbols a, b, c, d,
e, f, g, h, i, j) and the composition ratio of each of the conventional electrolytic solutions (sample symbols A, B, C, D) for comparison, and the specific resistance of the electrolytic solutions at 30 ° C. Indicates.
【０００８】[0008]
【表１】 [Table 1]
【０００９】また、表２に上記電解液を各々使用してア
ルミニウム電解コンデンサを各５０ケ作製し、１０５℃
中で１０００時間負荷試験を行った結果を示す。コンデ
ンサ試料は何れも定格１０Ｖ４７００μＦのアルミニウ
ム電解コンデンサである。Further, in Table 2, 50 electrolytic aluminum capacitors were prepared by using each of the above electrolytic solutions, and the aluminum electrolytic capacitors were heated to 105 ° C.
The results of the 1000 hour load test are shown below. All capacitor samples are aluminum electrolytic capacitors rated at 10V and 4700 μF.
【００１０】[0010]
【表２】 [Table 2]
【００１１】従来の電解液（試料記号Ａ，Ｂ，Ｃ，Ｄ）
を使用したアルミニウム電解コンデンサはガス発生が多
く、短時間で防爆弁が作動してしまった。本発明に係わ
る電解液（試料記号ａ，ｂ，ｃ，ｄ，ｅ，ｆ，ｇ，ｈ，
ｉ，ｊ）を使用したアルミニウム電解コンデンサは、１
０５℃１０００時間後でも安定した特性を示している。Conventional electrolytic solution (sample symbols A, B, C, D)
The aluminum electrolytic capacitor that used was generated a lot of gas, and the explosion-proof valve was activated in a short time. Electrolyte solution according to the present invention (sample symbols a, b, c, d, e, f, g, h,
Aluminum electrolytic capacitors using i, j) are
It shows stable characteristics even after 1000 hours at 05 ° C.
【００１２】[0012]
【発明の効果】以上のように本発明ではトリエチルテト
ラミン六酢酸を添加することにより、水の添加量が多く
なっても、高温下での安定性に優れ、比抵抗が低い電解
液が得られるので、低コストで電解コンデンサの特性改
善並びに信頼性向上をはかることができ、工業的ならび
に実用的価値の大なるものである。As described above, according to the present invention, by adding triethyltetramine hexaacetic acid, an electrolyte having excellent stability at high temperature and low specific resistance can be obtained even if the amount of water added increases. Therefore, it is possible to improve the characteristics and reliability of the electrolytic capacitor at low cost, which is of great industrial and practical value.
Claims (3)
媒にアジピン酸、安息香酸のうち少なくとも１種類の有
機カルボン酸またはその塩を溶質として溶解し、これに
トリエチルテトラミン六酢酸を添加したことを特徴とす
る電解コンデンサの駆動用電解液。1. An organic carboxylic acid of at least one of adipic acid and benzoic acid or a salt thereof is dissolved as a solute in a solvent mixture of ethylene glycol and water, and triethyltetramine hexaacetic acid is added thereto. An electrolytic solution for driving an electrolytic capacitor characterized by:
量が、０．０１〜３．０ｗｔ．％であることを特徴とす
る請求項１の電解コンデンサの駆動用電解液。2. The amount of triethyltetramine hexaacetic acid added is 0.01 to 3.0 wt. %, The electrolytic solution for driving the electrolytic capacitor according to claim 1.
である請求項１または請求項２の電解コンデンサの駆動
用電解液。3. The amount of water added is 10 to 30 wt. %
The electrolytic solution for driving the electrolytic capacitor according to claim 1 or 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26823695A JPH09115779A (en) | 1995-10-17 | 1995-10-17 | Electrolyte for driving electrolytic capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26823695A JPH09115779A (en) | 1995-10-17 | 1995-10-17 | Electrolyte for driving electrolytic capacitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09115779A true JPH09115779A (en) | 1997-05-02 |
Family
ID=17455804
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26823695A Pending JPH09115779A (en) | 1995-10-17 | 1995-10-17 | Electrolyte for driving electrolytic capacitor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09115779A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6288889B1 (en) | 1998-12-01 | 2001-09-11 | Rubycon Corporation | Electrolytic solution for electrolytic capacitor and electrolytic capacitor using the same |
| JP2001297947A (en) * | 2000-04-14 | 2001-10-26 | Nippon Chemicon Corp | Electrolytic solution for electrolytic capacitor and electrolytic capacitor using it |
-
1995
- 1995-10-17 JP JP26823695A patent/JPH09115779A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6288889B1 (en) | 1998-12-01 | 2001-09-11 | Rubycon Corporation | Electrolytic solution for electrolytic capacitor and electrolytic capacitor using the same |
| JP2001297947A (en) * | 2000-04-14 | 2001-10-26 | Nippon Chemicon Corp | Electrolytic solution for electrolytic capacitor and electrolytic capacitor using it |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
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Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20041116 |
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