JPH0355969B2 - - Google Patents
Info
- Publication number
- JPH0355969B2 JPH0355969B2 JP30009586A JP30009586A JPH0355969B2 JP H0355969 B2 JPH0355969 B2 JP H0355969B2 JP 30009586 A JP30009586 A JP 30009586A JP 30009586 A JP30009586 A JP 30009586A JP H0355969 B2 JPH0355969 B2 JP H0355969B2
- Authority
- JP
- Japan
- Prior art keywords
- electrolytic
- electrolytic solution
- ethylene glycol
- temperature
- specific resistance
- 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
Links
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 30
- 239000003990 capacitor Substances 0.000 claims description 23
- 239000008151 electrolyte solution Substances 0.000 claims description 17
- MNWFXJYAOYHMED-UHFFFAOYSA-N heptanoic acid Chemical compound CCCCCCC(O)=O MNWFXJYAOYHMED-UHFFFAOYSA-N 0.000 claims description 16
- YEJRWHAVMIAJKC-UHFFFAOYSA-N 4-Butyrolactone Chemical compound O=C1CCCO1 YEJRWHAVMIAJKC-UHFFFAOYSA-N 0.000 claims description 12
- 239000002904 solvent Substances 0.000 claims description 11
- 150000003839 salts Chemical class 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 7
- 239000004327 boric acid Substances 0.000 description 7
- 239000003792 electrolyte Substances 0.000 description 6
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 description 3
- ROSDSFDQCJNGOL-UHFFFAOYSA-N Dimethylamine Chemical compound CNC ROSDSFDQCJNGOL-UHFFFAOYSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000003472 neutralizing effect Effects 0.000 description 2
- GETQZCLCWQTVFV-UHFFFAOYSA-N trimethylamine Chemical compound CN(C)C GETQZCLCWQTVFV-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- KIWJQNYCQJZQLX-UHFFFAOYSA-N azanium;heptanoate Chemical compound [NH4+].CCCCCCC([O-])=O KIWJQNYCQJZQLX-UHFFFAOYSA-N 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- HPNMFZURTQLUMO-UHFFFAOYSA-N diethylamine Chemical compound CCNCC HPNMFZURTQLUMO-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002763 monocarboxylic acids Chemical class 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- WYXIGTJNYDDFFH-UHFFFAOYSA-Q triazanium;borate Chemical compound [NH4+].[NH4+].[NH4+].[O-]B([O-])[O-] WYXIGTJNYDDFFH-UHFFFAOYSA-Q 0.000 description 1
- IMFACGCPASFAPR-UHFFFAOYSA-N tributylamine Chemical compound CCCCN(CCCC)CCCC IMFACGCPASFAPR-UHFFFAOYSA-N 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Electric Double-Layer Capacitors Or The Like (AREA)
- Glass Compositions (AREA)
- Primary Cells (AREA)
Description
〔産業上の利用分野〕
この発明は、電解コンデンサ用電解液に係り、
特に、比抵抗など電気的な特性の改善に関する。
〔従来の技術〕
一般に、電解コンデンサは、アルミニウムなど
の皮膜形成性金属によつて形成された陽極側およ
び陰極側の電極箔をセパレータとともに巻回して
電解コンデンサ素子とし、その内部に駆動液とし
ての電解液を含浸した後、ケースに密封したもの
である。
そして、電解コンデンサは、許容電圧に応じて
低圧用と高圧用とに大別されるが、高圧用では電
解液を構成する電解質として硼酸が用いられてい
る。
〔発明が解決しようとする問題点〕
ところで、硼酸は電解質として用いた電解液で
は、硼酸自身または硼酸と溶媒との組合せによつ
て多量の縮合水（エステル水）が生成されるの
で、100℃以上になると縮合水の気化のため、ケ
ース内圧を異常に上昇させて防爆弁を開弁させる
など、100℃以上での使用が困難であり、また、
1kΩ以上の高比抵抗を呈するとともに、温度に
よつて容量が大幅に変化し、温度特性が著しく悪
いなどの欠点を有する。
そこで、この発明は、比抵抗の低下および温度
特性の改善を図つたものである。
〔問題点を解決するための手段〕
この発明の電解コンデンサ用電解液は、エチレ
ングリコールを含む溶媒に、溶質としてエナント
酸またはその塩を溶解したものである。
〔作用〕
この発明の電解コンデンサ用電解液では、エチ
レングリコールを含む溶媒に、エナント酸または
その塩を溶解すると、溶媒に対するエナント酸ま
たはその塩の溶解度が高く、しかも、その電離度
が高くなることから、比抵抗の低減が図られる。
また、この発明の電解コンデンサ用電解液で
は、縮合水が殆ど生成されないため、使用可能温
度範囲が拡大されるとともに、温度による容量変
化率を低下させることができる。
そして、主たる溶媒としてγ−ブチロラクトン
を用いた場合、γ−ブチロラクトンに対するエナ
ント酸またはその塩の溶解度が高く、低温域での
電離度が高くなることから、特に、低温域での使
用が可能になるので、使用可能温度範囲が拡大さ
れ、温度による容量変化率を低下させることがで
きる。
〔実施例〕
以下、この発明の実施例を従来例との比較によ
つて説明する。
硼酸を用いた従来の一般的な電解液（以下従来
例という）の組成およびその重量比（wt％）は、
エチレングリコール 67wt％
硼酸 16.5wt％
硼酸アンモニウム 16.5wt％
であり、このような電解液では、比抵抗Rs：1k
Ω、耐電圧Vs：400V、含水量（H2O）：26.0％で
ある。
これに対して、この発明の電解コンデンサ用電
解液の実施例の組成およびその重量比を以下に示
す。
実施例 １
エチレングリコール 90wt％
エナント酸アンモニウム 10wt％
実施例１の電流液は主たる溶媒としてエチレン
グリコールを含ませたものであり、この電解液で
は比抵抗Rs：380Ω、耐電圧Vs：400V、含水量
（H2O）：0.5％となり、従来例の電解液に比較し
て、比抵抗Rsが40％以下、含水量は微量になつ
た。
実施例 ２
γ−ブチロラクトン 78.3wt％
エチレングリコール 8.7wt％
エナント酸（直鎖モノカルボン酸） 13.0wt％
この場合、中和剤としてたとえば、微量のトリ
エチルアミンを添加した。なお、他の中和剤とし
てトリブチルアミン、トリメチルアミン、ジエチ
ルアミン、ジメチルアミンなどを用いることがで
きる。
実施例２の電解液は主たる溶媒としてγ−ブチ
ロラクトンを用いてエチレングリコールを含有さ
せたものであり、この電流液では比抵抗Rs：930
Ω、耐電圧Vs：400V、含水量（H2O）：0.5％と
なり、従来例の電解液に比較して、比抵抗Rsが
７％程度に減少し、含水量も微量になつた。
これら従来例と実施例１、２の電解液を用いて
電解コンデンサを作成した場合の各電解コンデン
サの常温下の初期特性を第１表に示す。
この実験に用いた電解コンデンサは、定格電圧
400WV、定格容量10μF、直径16mm、長さ30mmの
外観形状のものを用いた。
[Industrial Application Field] This invention relates to an electrolytic solution for electrolytic capacitors,
In particular, it relates to the improvement of electrical characteristics such as specific resistance. [Prior Art] In general, electrolytic capacitors are made by winding anode and cathode electrode foils made of a film-forming metal such as aluminum together with a separator to form an electrolytic capacitor element, which contains a driving liquid inside. After being impregnated with electrolyte, it is sealed in a case. Electrolytic capacitors are broadly classified into low-voltage capacitors and high-voltage capacitors depending on the allowable voltage, and boric acid is used as an electrolyte constituting the electrolytic solution in high-voltage capacitors. [Problems to be Solved by the Invention] By the way, in an electrolytic solution using boric acid as an electrolyte, a large amount of condensed water (ester water) is generated by the boric acid itself or the combination of boric acid and a solvent. If the temperature exceeds 100℃, use at temperatures above 100℃ is difficult, as condensation water vaporizes, causing the internal pressure of the case to rise abnormally and causing the explosion-proof valve to open.
It exhibits a high specific resistance of 1 kΩ or more, and has the disadvantage that its capacitance changes significantly depending on temperature, and its temperature characteristics are extremely poor. Therefore, the present invention aims to reduce the specific resistance and improve the temperature characteristics. [Means for Solving the Problems] The electrolytic solution for an electrolytic capacitor of the present invention is obtained by dissolving enanthic acid or its salt as a solute in a solvent containing ethylene glycol. [Function] In the electrolytic solution for electrolytic capacitors of the present invention, when enanthic acid or its salt is dissolved in a solvent containing ethylene glycol, the solubility of enanthic acid or its salt in the solvent is high, and the degree of ionization thereof is increased. Therefore, the specific resistance can be reduced. Furthermore, since the electrolytic solution for an electrolytic capacitor of the present invention hardly generates condensed water, the usable temperature range can be expanded and the rate of change in capacity due to temperature can be reduced. When γ-butyrolactone is used as the main solvent, the solubility of enanthic acid or its salt in γ-butyrolactone is high, and the degree of ionization increases at low temperatures, making it particularly possible to use it at low temperatures. Therefore, the usable temperature range is expanded and the rate of change in capacity due to temperature can be reduced. [Example] Hereinafter, an example of the present invention will be explained by comparing it with a conventional example. The composition and weight ratio (wt%) of a conventional general electrolyte solution using boric acid (hereinafter referred to as conventional example) is ethylene glycol 67wt% boric acid 16.5wt% ammonium borate 16.5wt%. Then, specific resistance Rs: 1k
Ω, withstand voltage Vs: 400V, water content (H 2 O): 26.0%. On the other hand, the composition and weight ratio of an example of the electrolytic solution for an electrolytic capacitor of the present invention are shown below. Example 1 Ethylene glycol 90wt% Ammonium enanthate 10wt% The electrolytic solution of Example 1 contains ethylene glycol as the main solvent, and this electrolytic solution has a specific resistance Rs: 380Ω, a withstand voltage Vs: 400V, and a water content. (H 2 O): 0.5%, the specific resistance Rs was 40% or less, and the water content was very small compared to the conventional electrolyte. Example 2 γ-Butyrolactone 78.3 wt% Ethylene glycol 8.7 wt% Enanthic acid (linear monocarboxylic acid) 13.0 wt% In this case, for example, a trace amount of triethylamine was added as a neutralizing agent. In addition, tributylamine, trimethylamine, diethylamine, dimethylamine, etc. can be used as other neutralizing agents. The electrolytic solution of Example 2 contained ethylene glycol using γ-butyrolactone as the main solvent, and this current solution had a specific resistance Rs: 930.
Ω, withstand voltage Vs: 400V, water content (H 2 O): 0.5%, and compared to the conventional electrolyte, the specific resistance Rs was reduced to about 7% and the water content was also very small. Table 1 shows the initial characteristics of each electrolytic capacitor at room temperature when electrolytic capacitors were made using the electrolytes of the conventional example and Examples 1 and 2. The electrolytic capacitor used in this experiment had a rated voltage of
The external shape used was 400WV, rated capacity 10μF, diameter 16mm, and length 30mm.
【表】
このような初期特性を呈する各電解コンデンサ
について、110℃の雰囲気下において、各電解コ
ンデンサの端子間に400Vの電圧を印加して1000
時間経過後の測定値を第２表に示す。[Table] For each electrolytic capacitor exhibiting these initial characteristics, a voltage of 400 V was applied between the terminals of each electrolytic capacitor in an atmosphere of 110°C for 1000
Table 2 shows the measured values after the elapse of time.
以上説明したように、この発明によれば、エチ
レングリコールを含む溶媒に、溶質としてエナン
ト酸またはその塩を溶解すると、エナント酸また
はその塩の溶媒に対する溶解度が高くなり、低温
域での電離度が高くなることから、比抵抗の低減
化が図られ、また、エチレングリコールやγ−ブ
チロラクトンからは硼酸を用いた場合のように多
量の縮合水が生成されないため、高温域における
使用が可能になり、かつ、低温域における容量変
化も低減できるので、使用可能な温度範囲が拡大
できる。
As explained above, according to the present invention, when enanthic acid or its salt is dissolved as a solute in a solvent containing ethylene glycol, the solubility of enanthic acid or its salt in the solvent increases, and the degree of ionization at low temperatures decreases. This makes it possible to reduce the specific resistance, and since ethylene glycol and γ-butyrolactone do not produce large amounts of condensed water as they do when boric acid is used, they can be used in high-temperature ranges. In addition, since the capacitance change in the low temperature range can be reduced, the usable temperature range can be expanded.
第１図はこの発明の電解コンデンサ用電解液お
よび従来の電解液を用いた電解コンデンサの温度
に対する静電容量の変化を示す図、第２図はこの
発明の電解コンデンサ用電解液および従来の電解
液を用いた電解コンデンサの温度に対する損失角
の正接の容量の変化を示す図、第３図はこの発明
の電解コンデンサ用電解液の溶質重量に対する比
抵抗を示す図である。
Fig. 1 shows the change in capacitance with respect to temperature of electrolytic capacitors using the electrolytic solution for electrolytic capacitors of the present invention and the conventional electrolytic solution, and Fig. 2 shows the change in capacitance with respect to temperature of electrolytic capacitors using the electrolytic solution for electrolytic capacitors of the present invention and the conventional electrolytic solution. FIG. 3 is a diagram showing the change in the capacitance of the tangent of the loss angle with respect to the temperature of an electrolytic capacitor using a liquid, and FIG.
Claims (1)
てエナント酸またはその塩を溶解してなる電解コ
ンデンサ用電解液。 ２ 前記溶媒にγ−ブチロラクトンを含有させた
特許請求の範囲第１項に記載の電解コンデンサ用
電解液。[Scope of Claims] 1. An electrolytic solution for an electrolytic capacitor, which is obtained by dissolving enanthic acid or its salt as a solute in a solvent containing ethylene glycol. 2. The electrolytic solution for an electrolytic capacitor according to claim 1, wherein the solvent contains γ-butyrolactone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US07/148,552 US4911854A (en) | 1985-12-19 | 1988-01-26 | Electrolyte for an electrolytic condenser |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60-286397 | 1985-12-19 | ||
| JP28639785 | 1985-12-19 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62241321A JPS62241321A (en) | 1987-10-22 |
| JPH0355969B2 true JPH0355969B2 (en) | 1991-08-27 |
Family
ID=17703872
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30009586A Granted JPS62241321A (en) | 1985-12-19 | 1986-12-18 | Electrolyte for electrolytic capacitor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62241321A (en) |
-
1986
- 1986-12-18 JP JP30009586A patent/JPS62241321A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62241321A (en) | 1987-10-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5507966A (en) | Electrolyte for an electrolytic capacitor | |
| JPH0376776B2 (en) | ||
| JPH11126732A (en) | Aluminium electrolytic capacitor | |
| JPH0355969B2 (en) | ||
| JPH0480526B2 (en) | ||
| JP2001223136A (en) | Aluminum electrolytic capacitor | |
| JP2572021B2 (en) | Electrolyte for electrolytic capacitors | |
| JPH0419691B2 (en) | ||
| US4911854A (en) | Electrolyte for an electrolytic condenser | |
| JP3749913B2 (en) | Electrolytic solution for electrolytic capacitor drive | |
| JP4745470B2 (en) | Electrolytic solution for electrolytic capacitor and electrolytic capacitor using the same | |
| JPH09115782A (en) | Electrolyte for driving electrolytic capacitor | |
| JPH0458512A (en) | Electrolyte for electrolytic capacitor | |
| JP2815874B2 (en) | Electrolyte for electrolytic capacitors | |
| JPH0775214B2 (en) | Aluminum electrolytic capacitor electrolyte | |
| JP2692880B2 (en) | Electrolyte for electrolytic capacitors | |
| KR0152001B1 (en) | Electrolyte for a low-pressure electrolytic condenser | |
| JPH09213581A (en) | Electrolyte for driving electrolytic capacitor | |
| JPH0550126B2 (en) | ||
| JP2003109861A (en) | Electrical double layer capacitor and electrolyte therefor | |
| JP3630206B2 (en) | Electrolytic solution for electrolytic capacitors | |
| JP3625234B2 (en) | Electrolytic solution for driving electrolytic capacitors | |
| JPH02148818A (en) | Electrolyte for driving electrolytic capacitor | |
| JPH11233379A (en) | Electrolyte for electrolytic capacitor and electrolytic capacitor using the same | |
| JPH0391912A (en) | Electrolyte for driving electrolytic capacitor |