JPH0963899A - Electrolyte for electrolytic capacitor - Google Patents
Electrolyte for electrolytic capacitorInfo
- Publication number
- JPH0963899A JPH0963899A JP23069095A JP23069095A JPH0963899A JP H0963899 A JPH0963899 A JP H0963899A JP 23069095 A JP23069095 A JP 23069095A JP 23069095 A JP23069095 A JP 23069095A JP H0963899 A JPH0963899 A JP H0963899A
- Authority
- JP
- Japan
- Prior art keywords
- salts
- polyhydric alcohol
- double bond
- acid
- main chain
- 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.)
- Granted
Links
Landscapes
- Electric Double-Layer Capacitors Or The Like (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は電解コンデンサ用電解液
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrolytic solution for electrolytic capacitors.
【０００２】[0002]
【従来の技術】近年、電解コンデンサの安全性に対する
要求が高まっている。電解コンデンサは、過剰な電圧の
負荷や偶発的な故障により短絡し、発火する危険性があ
る。この対策としては、電解紙を高密度化したりその厚
みを増す方法や陽極の酸化皮膜の耐圧を高める方法、電
解液の耐圧を高める方法、構造的な改良による方法等が
ある。そしてこれらの方法の中で電解液の耐圧を高める
方法は効果が大きく、また、電解紙を厚くしたり、陽極
の酸化皮膜の耐圧を高めたりする方法のようにはコンデ
ンサが大形化する欠点もなく、より優れている。2. Description of the Related Art In recent years, there has been an increasing demand for the safety of electrolytic capacitors. The electrolytic capacitor may be short-circuited or ignited due to excessive voltage load or accidental failure. As measures against this, there are a method of increasing the density of the electrolytic paper and increasing its thickness, a method of increasing the withstand voltage of the oxide film of the anode, a method of increasing the withstand voltage of the electrolytic solution, a method by structural improvement, and the like. Among these methods, the method of increasing the withstand voltage of the electrolytic solution has a great effect, and the disadvantage of increasing the size of the capacitor, such as increasing the thickness of the electrolytic paper or increasing the withstand voltage of the oxide film on the anode. Better than nothing.
【０００３】電解液の耐圧を高めるには電解液の火花発
生電圧を高めることが効果的である。そのため、一般的
に、分子量の大きい物質あるいは粘度の高い物質を添加
している。例えば、中高圧用の電解液は、従来長鎖有機
酸を溶質として用いたり、ポリエチレングリコールなど
の高分子化合物を添加して、火花発生電圧を高めてい
る。In order to increase the withstand voltage of the electrolytic solution, it is effective to increase the spark generation voltage of the electrolytic solution. Therefore, generally, a substance having a large molecular weight or a substance having a high viscosity is added. For example, medium- and high-voltage electrolytes have conventionally used a long-chain organic acid as a solute or added a polymer compound such as polyethylene glycol to increase the spark generation voltage.
【０００４】[0004]
【発明が解決しようとする課題】しかし、通常、分子量
の大きい物質や粘度の高い物質を添加すると、電解液の
比抵抗が著しく増大する。このため、比抵抗の増大をで
きるだけ低く抑えながら、火花発生電圧を改善できる電
解液が求められている。しかしながら、特に高圧用の電
解液の場合、有効な手段はほとんど見つかっていない。
本発明の目的は、比抵抗が増大するのを防止でき、火花
発生電圧を改善できる電解コンデンサ用電解液を提供す
るものである。However, in general, when a substance having a large molecular weight or a substance having a high viscosity is added, the specific resistance of the electrolytic solution remarkably increases. Therefore, there is a demand for an electrolytic solution capable of improving the spark generation voltage while suppressing an increase in the specific resistance as low as possible. However, particularly in the case of electrolytes for high pressure, few effective means have been found.
An object of the present invention is to provide an electrolytic solution for an electrolytic capacitor, which can prevent an increase in specific resistance and can improve a spark generation voltage.
【０００５】[0005]
【課題を解決するための手段】本発明は、上記の目的を
達成するために、多価アルコール類に、主鎖にＣ＝Ｃの
二重結合を有する一価アルコールを混合した溶媒に、有
機酸又はその塩、無機酸又はその塩のうち一種以上を溶
解することを特徴とする電解コンデンサ用電解液を提供
するものである。[Means for Solving the Problems] In order to achieve the above-mentioned object, the present invention provides an organic solvent in which a polyhydric alcohol is mixed with a monohydric alcohol having a C = C double bond in the main chain. Disclosed is an electrolytic solution for an electrolytic capacitor, which is characterized by dissolving one or more of an acid or a salt thereof and an inorganic acid or a salt thereof.
【０００６】多価アルコール類はエチレングリコールや
ジエチレングリコール、プロピレングリコール、１，４
−ブタンジオール等を用いる。主鎖にＣ＝Ｃの二重結合
を有する一価アルコールは、１−ブテン−３−オールや
１−ヘキセン−３−オール、リナロール、ゲラニオー
ル、３−メチル−３−ブテン−１−オール等を用いる。
そしてこれらの物質は、０．２wt％以上が良く、０．２
wt％未満では火花発生電圧を高める効果が低くなる。ま
た、混合量の上限は各物質が多価アルコール類に溶解で
きるまでとする。有機酸は、セバシン酸や１，６−デカ
ンジカルボン酸、カプリル酸、フェニルホスホン酸等を
用いる。有機酸塩は、これらの塩、すなわち、セバシン
酸アンモニウムや１，６−デカンジカルボン酸アンモニ
ウム、カプリル酸アンモニウム、フェニルホスホン酸ア
ンモニウム、カプリル酸アンモニウム等を用いる。無機
酸は、ホウ酸やリン酸等を用いる。無機酸塩は、ホウ酸
アンモニウムやリン酸アンモニウム等を用いる。Polyhydric alcohols include ethylene glycol, diethylene glycol, propylene glycol, 1,4
-Use butanediol or the like. Monohydric alcohols having a C = C double bond in the main chain include 1-buten-3-ol, 1-hexen-3-ol, linalool, geraniol, 3-methyl-3-buten-1-ol and the like. To use.
And 0.2wt% or more of these substances are good, and 0.2
If it is less than wt%, the effect of increasing the spark generation voltage becomes low. In addition, the upper limit of the mixing amount is set such that each substance can be dissolved in the polyhydric alcohol. As the organic acid, sebacic acid, 1,6-decanedicarboxylic acid, caprylic acid, phenylphosphonic acid, or the like is used. As the organic acid salt, these salts, that is, ammonium sebacate, ammonium 1,6-decanedicarboxylate, ammonium caprylate, ammonium phenylphosphonate, ammonium caprylate and the like are used. As the inorganic acid, boric acid, phosphoric acid, or the like is used. As the inorganic acid salt, ammonium borate, ammonium phosphate or the like is used.
【０００７】[0007]
【作用】火花発生電圧は、一般に分子容の大きい化合物
の方が高い傾向を示す。そして分子の形状や大きさが似
ている場合には、二重結合の有無によらず近い値を示
す。アルコール類は電解液中の主溶質である有機酸やホ
ウ酸等の無機酸との間にエステルを形成することがあ
り、それ自体の分子容がさほど大きくなくてもエステル
化によって分子容が増大し、火花発生電圧を高くする。The spark generation voltage of a compound having a large molecular volume generally tends to be higher. When the shapes and sizes of molecules are similar, the values are close regardless of the presence or absence of double bonds. Alcohols may form esters with organic acids, which are the main solutes in the electrolyte, and inorganic acids such as boric acid. Even if the molecular volume of itself is not so large, the molecular volume increases due to esterification. And increase the spark generation voltage.
【０００８】そして主鎖に二重結合を有する一価アルコ
ール類を用いると、分子の回転が規制されることで主電
解質であるイオンの移動に対する障害が少なくなる。そ
のため、電解液中の含水率が低減しても比抵抗があまり
大きくならないものと思われる。When a monohydric alcohol having a double bond in the main chain is used, the rotation of the molecule is regulated, so that the obstacles to the movement of ions as the main electrolyte are reduced. Therefore, it seems that the specific resistance does not become so large even if the water content in the electrolytic solution is reduced.
【０００９】[0009]
【実施例】以下、本発明を実施例に基づいて説明する。
多価アルコールとしてエチレングリコールを用いる。ま
た、主鎖にＣ＝Ｃの二重結合を有する一価アルコールと
して、１−ブテン−３−オールや１−ヘキセン−３−オ
ール、リナロール、ゲラニオール、３−メチル−３−ブ
テン−１−オールを用いる。有機酸としてフェニルホス
ホン酸やカプリル酸を用いる。有機酸塩としてセバシン
酸アンモニウムや１，６−デカンジカルボン酸アンモニ
ウム、カプリル酸アンモニウムを用いる。無機酸として
ホウ酸やリン酸を用いる。無機酸塩としてホウ酸アンモ
ニウムを用いる。EXAMPLES The present invention will be described below based on examples.
Ethylene glycol is used as the polyhydric alcohol. Further, as a monohydric alcohol having a C = C double bond in the main chain, 1-buten-3-ol, 1-hexen-3-ol, linalool, geraniol, 3-methyl-3-buten-1-ol are used. To use. Phenylphosphonic acid or caprylic acid is used as the organic acid. Ammonium sebacate, ammonium 1,6-decanedicarboxylate, or ammonium caprylate is used as the organic acid salt. Boric acid or phosphoric acid is used as the inorganic acid. Ammonium borate is used as the inorganic acid salt.
【００１０】次に表１及び表２に示す組成からなる実施
例及び従来例の電解液について、比抵抗及び火花発生電
圧を測定した。Next, the specific resistance and the spark generation voltage were measured for the electrolytic solutions of Examples and Conventional Examples having the compositions shown in Tables 1 and 2.
【００１１】[0011]
【表１】 [Table 1]
【００１２】[0012]
【表２】 [Table 2]
【００１３】表１及び表２から明らかな通り、実施例１
〜実施例１３は、比抵抗が５８０〜２０８０Ω・cmそし
て火花発生電圧が４６０〜４８０Ｖとなる。また、従来
例１〜従来例５は、比抵抗が１０５０〜３５７０Ω・cm
そして火花発生電圧が４５０〜４７０Ｖとなる。すなわ
ち、実施例１〜実施例１３の方が従来例１〜従来例５に
比較して、全体的に、火花発生電圧が高く、比抵抗が低
くなっている。As is clear from Table 1 and Table 2, Example 1
In Example 13, the specific resistance is 580 to 2080 Ω · cm and the spark generation voltage is 460 to 480V. Further, in Conventional Example 1 to Conventional Example 5, the specific resistance is 1050 to 3570 Ω · cm.
Then, the spark generation voltage becomes 450 to 470V. That is, in Examples 1 to 13, the spark generation voltage was higher and the specific resistance was lower as a whole, as compared with Conventional Examples 1 to 5.
【００１４】[0014]
【発明の効果】以上の通り、本発明によれば、主鎖にＣ
＝Ｃの二重結合を有する一価アルコールを溶媒の一種と
して用いるとともに、有機酸や無機酸、それらの塩を溶
解しているため、比抵抗が低くかつ火花発生電圧の高い
電解コンデンサ用電解液が得られる。As described above, according to the present invention, the main chain has C
= C monohydric alcohol having a double bond is used as one of the solvents, and an organic acid, an inorganic acid, and salts thereof are dissolved, so that the electrolytic solution has a low specific resistance and a high spark generation voltage. Is obtained.
Claims (1)
重結合を有する一価アルコールを混合した溶媒に、有機
酸又はその塩、無機酸又はその塩のうち一種以上を溶解
することを特徴とする電解コンデンサ用電解液。1. An organic acid or a salt thereof, an inorganic acid or a salt thereof is dissolved in a solvent prepared by mixing a polyhydric alcohol with a monohydric alcohol having a C═C double bond in the main chain. An electrolytic solution for an electrolytic capacitor, which is characterized in that
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23069095A JP3240889B2 (en) | 1995-08-17 | 1995-08-17 | Electrolyte for electrolytic capacitors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23069095A JP3240889B2 (en) | 1995-08-17 | 1995-08-17 | Electrolyte for electrolytic capacitors |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0963899A true JPH0963899A (en) | 1997-03-07 |
| JP3240889B2 JP3240889B2 (en) | 2001-12-25 |
Family
ID=16911791
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23069095A Expired - Lifetime JP3240889B2 (en) | 1995-08-17 | 1995-08-17 | Electrolyte for electrolytic capacitors |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3240889B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1653544A4 (en) * | 2003-07-11 | 2010-07-28 | Shishiai Kk | Cooling liquid composition for fuel cell |
-
1995
- 1995-08-17 JP JP23069095A patent/JP3240889B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1653544A4 (en) * | 2003-07-11 | 2010-07-28 | Shishiai Kk | Cooling liquid composition for fuel cell |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3240889B2 (en) | 2001-12-25 |
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