JP3240889B2 - Electrolyte for electrolytic capacitors - Google Patents
Electrolyte for electrolytic capacitorsInfo
- Publication number
- JP3240889B2 JP3240889B2 JP23069095A JP23069095A JP3240889B2 JP 3240889 B2 JP3240889 B2 JP 3240889B2 JP 23069095 A JP23069095 A JP 23069095A JP 23069095 A JP23069095 A JP 23069095A JP 3240889 B2 JP3240889 B2 JP 3240889B2
- Authority
- JP
- Japan
- Prior art keywords
- electrolyte
- acid
- electrolytic capacitors
- spark generation
- electrolytic
- 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 - Lifetime
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 an electrolytic capacitor.
【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 safety of electrolytic capacitors. Electrolytic capacitors can be short-circuited and ignited by excessive voltage loads or accidental failures. As a countermeasure, there are a method of increasing the density and thickness of the electrolytic paper, 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, and a method of structural improvement. Among these methods, the method of increasing the withstand voltage of the electrolytic solution has a large effect, and the disadvantage that the capacitor becomes large, such as the method of increasing the thickness of the electrolytic paper or the withstand voltage of the oxide film of the anode. No better.
【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 electrolyte, it is effective to increase the spark generation voltage of the electrolyte. Therefore, a substance having a large molecular weight or a substance having a high viscosity is generally added. For example, in a medium-to-high pressure electrolyte, a spark generation voltage is conventionally increased by using a long-chain organic acid as a solute or adding a polymer compound such as polyethylene glycol.
【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, when a substance having a large molecular weight or a substance having a high viscosity is added, the specific resistance of the electrolytic solution is significantly increased. For this reason, there is a demand for an electrolyte that can improve the spark generation voltage while keeping the increase in specific resistance as low as possible. However, particularly in the case of an electrolyte for high pressure, almost no effective means has 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。In order to achieve the above-mentioned object, the present invention provides an organic solvent containing a mixture of a polyhydric alcohol and a monohydric alcohol having a C = C double bond in the main chain. It is intended to provide an electrolytic solution for an electrolytic capacitor, characterized by dissolving at least one of an acid or a salt thereof and an inorganic acid .
【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。 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. Used.
These substances are preferably 0.2 wt% or more, and 0.2 wt% or more.
If it is less than wt%, the effect of increasing the spark generation voltage will be low. The upper limit of the mixing amount is set so that each substance can be dissolved in polyhydric alcohols. 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, namely, ammonium sebacate, ammonium 1,6-decanedicarboxylate, ammonium caprylate, ammonium phenylphosphonate, ammonium caprylate and the like are used. inorganic
As the acid, boric acid, phosphoric acid, 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 the molecules are similar, they show close values regardless of the presence or absence of the double bond. Alcohols may form esters with the main solutes in the electrolyte, such as organic acids and inorganic acids such as boric acid, and the molecular volume increases by esterification even if the molecular volume of the alcohol itself is not so large. 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。[0008] When a monohydric alcohol having a double bond in the main chain is used, the rotation of the molecule is regulated, so that the obstacle to the movement of ions as the main electrolyte is reduced. Therefore, it is considered that the specific resistance does not increase so much even if the water content in the electrolytic solution decreases.
【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。 DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on embodiments.
Ethylene glycol is used as the polyhydric alcohol. Examples of the monohydric alcohol having a C = C double bond in the main chain include 1-buten-3-ol, 1-hexen-3-ol, linalool, geraniol, and 3-methyl-3-buten-1-ol. Is used. Phenylphosphonic acid or caprylic acid is used as the organic acid. As the organic acid salt, ammonium sebacate, ammonium 1,6-decanedicarboxylate, or ammonium caprylate is used. As an inorganic acid
Use boric acid or phosphoric acid.
【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 of the electrolytes of Examples and the conventional examples having the compositions shown in Tables 1 and 2 were measured.
【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７は、比抵抗が５８０〜８２０Ω・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７の方が従来例１〜従来例５に比較し
て、全体的に比抵抗が低くなっている。As apparent from Tables 1 and 2, Example 1
In Example 7 , the specific resistance is 580 to 820 Ω · cm, and the spark generation voltage is 460 to 480 V. Conventional example 1
-Conventional example 5 has a specific resistance of 1050 to 3570 Ω · cm and a spark generation voltage of 450 to 470V. That is,
Examples 1 to 7 have lower overall specific resistances than 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、有機酸やその塩、無機酸を溶解し
ているため、比抵抗が低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, C is added to the main chain.
Since a monohydric alcohol having a double bond of = C is used as one kind of solvent and an organic acid, a salt thereof, and an inorganic acid are dissolved , an electrolytic solution for an electrolytic capacitor having a low specific resistance can be 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。An organic acid, a salt thereof, or an inorganic acid is dissolved in a solvent obtained by mixing a monohydric alcohol having a C = C double bond in a main chain thereof with a polyhydric alcohol. Electrolyte for electrolytic capacitors.
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 JPH0963899A (en) | 1997-03-07 |
| JP3240889B2 true 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) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005006476A1 (en) * | 2003-07-11 | 2005-01-20 | Shishiai-Kabushikigaisha | Cooling fluid composition for fuel battery |
-
1995
- 1995-08-17 JP JP23069095A patent/JP3240889B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0963899A (en) | 1997-03-07 |
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