JPH0719731B2 - Electrolytic solution for electrolytic capacitors - Google Patents
Electrolytic solution for electrolytic capacitorsInfo
- Publication number
- JPH0719731B2 JPH0719731B2 JP2063790A JP2063790A JPH0719731B2 JP H0719731 B2 JPH0719731 B2 JP H0719731B2 JP 2063790 A JP2063790 A JP 2063790A JP 2063790 A JP2063790 A JP 2063790A JP H0719731 B2 JPH0719731 B2 JP H0719731B2
- Authority
- JP
- Japan
- Prior art keywords
- electrolytic
- electrolytic solution
- high temperature
- acid
- capacitors
- 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)
Description
【発明の詳細な説明】 （従来の技術） 本発明は高温度で使用できる電解コンデンサ用電解液に
関する。DETAILED DESCRIPTION OF THE INVENTION (Prior Art) The present invention relates to an electrolytic solution for an electrolytic capacitor that can be used at high temperatures.
（従来の技術） 電解コンデンサ用電解液は、高温度領域においても使用
できるように、例えば比較的分子量の大きい有機酸ある
いはその塩を溶質としている。有機酸系の溶質としては
特公昭60−13293号の通り1.6−デカンジカルボン酸が公
知である。(Prior Art) An electrolytic solution for an electrolytic capacitor uses, for example, an organic acid having a relatively large molecular weight or a salt thereof as a solute so that it can be used even in a high temperature region. As an organic acid-based solute, 1.6-decanedicarboxylic acid is known as disclosed in JP-B-60-13293.
（発明が解決しようとする課題） しかし、1.6−デカンジカルボン酸を溶質とする電解液
は、1.6−デカンジカルボン酸がコンデンサ素子を形成
するアルミ箔と反応して錯体を形成するために、コンデ
ンサの初期静電容量値が低く、高温負荷試験や高温無負
荷試験において静電容量が極端に減少し、漏れ電流が増
大する欠点がある。(Problems to be Solved by the Invention) However, the electrolytic solution containing 1.6-decanedicarboxylic acid as a solute causes the reaction of 1.6-decanedicarboxylic acid with the aluminum foil forming the capacitor element to form a complex. There is a drawback that the initial capacitance value is low, the capacitance is extremely reduced in the high temperature load test and the high temperature no-load test, and the leakage current increases.
これ等の欠点を改良するために、1.6−デカンジカルボ
ン酸に、例えばリン酸や硫酸（特開昭58−92206号）、
マレイン酸（特開昭58−92208号）、クエン酸（特開昭5
9−219920号）等を添加している。In order to improve these drawbacks, 1.6-decanedicarboxylic acid is added to, for example, phosphoric acid or sulfuric acid (JP-A-58-92206),
Maleic acid (JP-A-58-92208), citric acid (JP-A-58)
9-219920) etc. are added.
しかし、これ等の添加剤は熱的な安定性が低く、高温領
域の特性の改善の効果が低い。However, these additives have low thermal stability and have a low effect of improving the characteristics in the high temperature region.
本発明は、以上の欠点を改良し、高温領域において安定
で、電解コンデンサの特性を向上しうる電解コンデンサ
用電解液を提供することを目的とする。An object of the present invention is to provide an electrolytic solution for an electrolytic capacitor, which improves the above-mentioned drawbacks, is stable in a high temperature region, and can improve the characteristics of the electrolytic capacitor.
（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
ルを主成分とする溶媒に1.6−デカンジカルボン酸また
はその塩を溶解した電解コンデンサ用電解液において、
フェニルリン酸二ナトリウム水和物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) The present invention, in order to achieve the above object, in an electrolytic solution for an electrolytic capacitor in which 1.6-decanedicarboxylic acid or a salt thereof is dissolved in a solvent having a polyhydric alcohol as a main component,
Disclosed is an electrolytic solution for an electrolytic capacitor, which dissolves disodium phenylphosphate hydrate.
（作用） フェニルリン酸二ナトリウム水和物は、C6H5Na2PO4・H2
Oからなる示性式を有し1.6−デカンジカルボン酸とアル
ミニウム箔とが反応して錯体を形成するのを防止でき
る。そのために錯体を原因としてコンデンサの初期静電
容量値が低くなり、高温度領域におけて劣化する等を抑
制できる。(Action) Disodium phenyl phosphate hydrate is C 6 H 5 Na 2 PO 4 .H 2
It has a rational formula of O and can prevent a reaction between 1.6-decanedicarboxylic acid and aluminum foil to form a complex. Therefore, the initial capacitance value of the capacitor is lowered due to the complex, and deterioration in the high temperature range can be suppressed.
（実施例） 以下、本発明を実施例に基づいて説明する。(Example) Hereinafter, the present invention will be described based on examples.
溶媒には、エチレングリコールやジエチレングリコール
等の多価アルコールを用いる。A polyhydric alcohol such as ethylene glycol or diethylene glycol is used as the solvent.
溶質には、1.6−デカンジカルボン酸や1.6−デカンジカ
ルボン酸アンモニウムを用いる。As the solute, 1.6-decanedicarboxylic acid or ammonium 1.6-decanedicarboxylate is used.
そして、添加剤としては、特に、フェニルリン酸二ナト
リウム水和物を用いる。Then, as the additive, disodium phenylphosphate hydrate is particularly used.
他に、PH調整剤としてアンモニウム水を、化成性を改良
するために硼酸を添加する。In addition, ammonium water is added as a PH adjuster, and boric acid is added to improve the chemical conversion.
次に、本発明の実施例と従来の電解液について、比抵抗
と火花電圧を測定したところ表１の通りの結果が得られ
た。測定時の電解液の温度は、比抵抗が30℃、火花電圧
が85℃とする。Next, when the specific resistance and the spark voltage were measured for the examples of the present invention and the conventional electrolytic solution, the results shown in Table 1 were obtained. The temperature of the electrolyte at the time of measurement shall be 30 ° C in specific resistance and 85 ° C in spark voltage.
表１から明らかな通り、実施例１〜実施例７によれば、
比抵抗が470〜510Ωcm、火花電圧が410〜450Vとなるの
に対し、従来例１〜従来例５は、比抵抗が570〜600Ω・
cm、火花電圧が410〜430Vとなる。すなわち、火花電圧
はほぼ同じであるが、比抵抗は実施例１〜実施例７によ
る方がほぼ78％〜89％となり、低い値が得られる。 As is clear from Table 1, according to Examples 1 to 7,
The specific resistance is 470 to 510 Ωcm and the spark voltage is 410 to 450 V, while the conventional examples 1 to 5 have a specific resistance of 570 to 600 Ω.
cm, spark voltage is 410 ~ 430V. That is, although the spark voltages are almost the same, the specific resistances of Examples 1 to 7 are about 78% to 89%, which is a low value.
また、表１の組成の電解液のうち、実施例１、実施例
３、実施例５及び実施例６並びに従来例１〜従来例３を
含浸した定格400V、100μＦの電解コンデンサを各20個
用いて、高温負荷試験及び高温無負荷試験を行なった。
高温負荷試験条件は、温度105℃、印加電圧400V、放置
時間1000hrとする。また高温無負荷試験条件は、温度10
5℃、放置時間1000hrとする。測定結果は表２の通りと
なる。Further, among the electrolytic solutions having the compositions shown in Table 1, 20 electrolytic capacitors each rated at 400 V and 100 μF impregnated with Example 1, Example 3, Example 5 and Example 6 and Conventional Example 1 to Conventional Example 3 were used. Then, a high temperature load test and a high temperature no-load test were performed.
The high temperature load test conditions are a temperature of 105 ° C, an applied voltage of 400V, and a standing time of 1000 hours. Also, the high temperature no-load test condition is 10
5 ℃, leave time 1000hr. The measurement results are shown in Table 2.
表２から明らかな通り、初期の静電容量は実施例１〜実
施例４の電解液を含浸したNO1〜NO4が104〜112μＦで、
従来例１〜従来例３を含浸したNO5〜NO6が97.1〜98.3μ
Ｆとなり、前者の方が後者の約1.06〜1.15倍となる。ま
た、高温負荷試験において、静電容量変化率は、NO1〜N
O4が−1.8〜−2.9％であり、NO5〜NO7が−7.3〜−10.9
％となり、前者の本発明の実施例による方が後者の約17
％〜40％に減少できる。漏れ電流についても、NO1〜NO4
が5.1〜5.9μＡ、NO5〜NO7が11.0〜15.5μＡとなり、前
者の方が後者の約33％〜54％となり、増加を抑制でき
る。さらに、高温無負荷試験において、静電容量変化率
は、NO1〜NO4が−1.2〜−2.4％、NO5〜NO7が−8.5〜−1
0.5％となり、前者は後者の約11％〜28％となる。漏れ
電流もNO1〜NO4が192〜221μＡ、NO5〜NO7が638〜710μ
Ａとなり、前者の方が後者の約27％〜35％となり劣化が
抑えられる。tan δの上昇もNO1〜NO4が1.05〜1.1倍、N
O5〜NO7が1.3〜1.59倍となり、前者の方が後者よりも低
い値に抑えられる。 As is clear from Table 2, the initial capacitance is 104 to 112 μF for NO1 to NO4 impregnated with the electrolytic solutions of Examples 1 to 4,
NO5 ~ NO6 impregnated with Conventional Example 1 to Conventional Example 3 is 97.1 ~ 98.3μ
It becomes F, and the former is about 1.06 to 1.15 times the latter. In the high temperature load test, the capacitance change rate was NO1 to N.
O4 is -1.8 to -2.9%, NO5 to NO7 is -7.3 to -10.9
%, And the former embodiment of the present invention is about 17% of the latter.
% To 40%. Regarding leakage current, NO1 to NO4
Is 5.1 to 5.9 μA, NO5 to NO7 is 11.0 to 15.5 μA, and the former is about 33% to 54% of the latter, and the increase can be suppressed. Furthermore, in the high temperature no-load test, the capacitance change rate was -1.2 to -2.4% for NO1 to NO4 and -8.5 to -1 for NO5 to NO7.
0.5%, the former is about 11% ~ 28% of the latter. Leakage current is 192-221μA for NO1-NO4, 638-710μ for NO5-NO7
A, the former is about 27% to 35% of the latter and deterioration is suppressed. The increase in tan δ is 1.05 to 1.1 times for NO1 to NO4, N
O5-NO7 is 1.3-1.59 times, and the former is suppressed to a lower value than the latter.
（発明の効果） 以上の通り、本発明によれば、フェニルリン酸二ナトリ
ウム水和物を添加することにより、電解コンデンサに含
浸した場合にその静電容量特性やtan δ特性、漏れ電流
特性を向上しうる電解コンデンサ用電解液が得られる。(Effects of the Invention) As described above, according to the present invention, by adding disodium phenylphosphate hydrate, the capacitance characteristics, tan δ characteristics, and leakage current characteristics when impregnated into an electrolytic capacitor are improved. An improved electrolytic solution for electrolytic capacitors is obtained.
Claims (1)
−デカンジカルボン酸またはその塩を溶解した電解コン
デンサ用電解液において、フェニルリン酸二ナトリウム
水和物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. A solvent containing a polyhydric alcohol as a main component is 1.6.
-An electrolytic solution for an electrolytic capacitor, characterized in that, in an electrolytic solution for an electrolytic capacitor in which decanedicarboxylic acid or a salt thereof is dissolved, disodium phenylphosphate hydrate is dissolved.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2063790A JPH0719731B2 (en) | 1990-01-31 | 1990-01-31 | Electrolytic solution for electrolytic capacitors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2063790A JPH0719731B2 (en) | 1990-01-31 | 1990-01-31 | Electrolytic solution for electrolytic capacitors |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03225909A JPH03225909A (en) | 1991-10-04 |
| JPH0719731B2 true JPH0719731B2 (en) | 1995-03-06 |
Family
ID=12032743
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2063790A Expired - Lifetime JPH0719731B2 (en) | 1990-01-31 | 1990-01-31 | Electrolytic solution for electrolytic capacitors |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0719731B2 (en) |
-
1990
- 1990-01-31 JP JP2063790A patent/JPH0719731B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03225909A (en) | 1991-10-04 |
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