JPH03225907A - Electrolyte for electrolytic capacitor - Google Patents
Electrolyte for electrolytic capacitorInfo
- Publication number
- JPH03225907A JPH03225907A JP2063590A JP2063590A JPH03225907A JP H03225907 A JPH03225907 A JP H03225907A JP 2063590 A JP2063590 A JP 2063590A JP 2063590 A JP2063590 A JP 2063590A JP H03225907 A JPH03225907 A JP H03225907A
- Authority
- JP
- Japan
- Prior art keywords
- acid
- electrolytic capacitor
- long
- chain dibasic
- alkyl groups
- 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 16
- 239000003792 electrolyte Substances 0.000 title abstract description 7
- 239000002253 acid Substances 0.000 claims abstract description 13
- IMQLKJBTEOYOSI-GPIVLXJGSA-N Inositol-hexakisphosphate Chemical compound OP(O)(=O)O[C@H]1[C@H](OP(O)(O)=O)[C@@H](OP(O)(O)=O)[C@H](OP(O)(O)=O)[C@H](OP(O)(O)=O)[C@@H]1OP(O)(O)=O IMQLKJBTEOYOSI-GPIVLXJGSA-N 0.000 claims abstract description 8
- IMQLKJBTEOYOSI-UHFFFAOYSA-N Phytic acid Natural products OP(O)(=O)OC1C(OP(O)(O)=O)C(OP(O)(O)=O)C(OP(O)(O)=O)C(OP(O)(O)=O)C1OP(O)(O)=O IMQLKJBTEOYOSI-UHFFFAOYSA-N 0.000 claims abstract description 8
- 125000000217 alkyl group Chemical group 0.000 claims abstract description 8
- 239000000467 phytic acid Substances 0.000 claims abstract description 8
- 229940068041 phytic acid Drugs 0.000 claims abstract description 8
- 235000002949 phytic acid Nutrition 0.000 claims abstract description 8
- 150000003839 salts Chemical class 0.000 claims abstract description 7
- 239000002904 solvent Substances 0.000 claims abstract description 5
- 150000005846 sugar alcohols Polymers 0.000 claims abstract description 5
- 239000008151 electrolyte solution Substances 0.000 claims description 11
- 125000004432 carbon atom Chemical group C* 0.000 claims description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 abstract description 8
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052782 aluminium Inorganic materials 0.000 abstract description 4
- 229910000147 aluminium phosphate Inorganic materials 0.000 abstract description 4
- 238000003411 electrode reaction Methods 0.000 abstract description 2
- 230000001681 protective effect Effects 0.000 abstract description 2
- 239000004135 Bone phosphate Substances 0.000 description 3
- 150000007513 acids Chemical class 0.000 description 3
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 3
- CXMXRPHRNRROMY-UHFFFAOYSA-N sebacic acid Chemical compound OC(=O)CCCCCCCCC(O)=O CXMXRPHRNRROMY-UHFFFAOYSA-N 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 2
- 239000004327 boric acid Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- BDJRBEYXGGNYIS-UHFFFAOYSA-N nonanedioic acid Chemical compound OC(=O)CCCCCCCC(O)=O BDJRBEYXGGNYIS-UHFFFAOYSA-N 0.000 description 2
- RPJFWCBHJRVFMJ-UHFFFAOYSA-N 2,2-diethyloctanedioic acid Chemical compound CCC(CC)(C(O)=O)CCCCCC(O)=O RPJFWCBHJRVFMJ-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-IGMARMGPSA-N Carbon-12 Chemical compound [12C] OKTJSMMVPCPJKN-IGMARMGPSA-N 0.000 description 1
- 241000270295 Serpentes Species 0.000 description 1
- 150000003863 ammonium salts Chemical class 0.000 description 1
- 239000010407 anodic oxide Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000032050 esterification Effects 0.000 description 1
- 238000005886 esterification reaction Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 150000002334 glycols Chemical class 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Abstract
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は中高圧用の電解コンデンサ用電解液に関する。[Detailed description of the invention] (Industrial application field) The present invention relates to an electrolytic solution for medium-high voltage electrolytic capacitors.
（従来の技術）
電子機器には、種々の特徴を有する電解コンデンサが用
いられている。例えば、スイッチング周波数の高い安定
化電源には、高周波に対して低インピーダンス特性を有
し、上限使用温度の高い電（１）
解コンデンサが使われる。(Prior Art) Electrolytic capacitors having various characteristics are used in electronic devices. For example, a stabilized power supply with a high switching frequency uses an electrolytic (1) capacitor that has low impedance characteristics at high frequencies and a high upper limit operating temperature.
この条件を満たす電解コンデンサには、１．６−デカン
ジカルボン酸やアゼライン酸、セバシン酸、１．１０−
デカンジカルボン酸等の有機三塩基性酸のアンモニウム
塩を主な溶質とする電解液が含浸されている。特に、有
機三塩基性酸のなかでも側鎖にアルキル基を有する長鎖
二塩基性酸が中高圧用として優れている。Electrolytic capacitors that meet this condition include 1.6-decanedicarboxylic acid, azelaic acid, sebacic acid, 1.10-
It is impregnated with an electrolytic solution whose main solute is an ammonium salt of an organic tribasic acid such as decanedicarboxylic acid. In particular, among organic tribasic acids, long chain dibasic acids having an alkyl group in the side chain are excellent for use in medium and high pressure applications.
そして従来は、有機三塩基性酸等を溶解するとともに、
水やホウ酸、リン酸等を添加して特性をさらに改良して
いる。Conventionally, while dissolving an organic tribasic acid, etc.,
Its properties are further improved by adding water, boric acid, phosphoric acid, etc.
（発明が解決しようとする課題）
しかし、電解コンデンサの使用温度が１００℃より高く
なると、従来の組成の電解液では、ガスが多量に発生し
て不良となり易くなる。そのために、従来添加していた
水や、グリコール類とのエステル化により水を生成する
ホウ酸の使用が難しくなり、電解コンデンサの特性が低
下する欠点がある。また、リン酸は長鎖二塩基性酸を用
いた電解液の欠点である静電容量の減少を抑制し、化成
（２）
性を向上する作用を有しているが、多量に添加すると、
陽極酸化皮膜を溶解して個れ電流を増加させ、ガス発生
量が増す欠点がある。(Problems to be Solved by the Invention) However, when the operating temperature of an electrolytic capacitor becomes higher than 100° C., an electrolytic solution having a conventional composition tends to generate a large amount of gas and become defective. For this reason, it becomes difficult to use conventionally added water or boric acid, which produces water through esterification with glycols, resulting in a disadvantage that the characteristics of the electrolytic capacitor deteriorate. In addition, phosphoric acid has the effect of suppressing the decrease in capacitance, which is a drawback of electrolytes using long-chain dibasic acids, and improving chemical formation (2), but when added in large amounts,
It has the disadvantage that it dissolves the anodic oxide film, increases the individual current, and increases the amount of gas generated.
本発明は、以上の欠点を改良し、高温で安定に作用し、
ガス発生を抑制でき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。The present invention improves the above drawbacks, works stably at high temperatures,
The purpose of the present invention is to provide an electrolytic solution for electrolytic capacitors that can suppress gas generation.
（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
ル類を主体とする溶媒に、炭素数１２で側鎖にアルキル
基を有する長鎖二塩基性酸またはその塩の少なくとも一
種類を溶解した電解コンデンサ用電解液において、フィ
チン酸を添加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 object, the present invention provides a method for adding a long chain dibasic acid having 12 carbon atoms and an alkyl group in the side chain to a solvent mainly composed of polyhydric alcohols. The present invention provides an electrolytic solution for an electrolytic capacitor in which at least one type of salt thereof is dissolved, and the electrolytic solution is characterized in that phytic acid is added thereto.
（作用）
フィチン酸は、アルミニウムと反応して電極表面にリン
酸よりも安定な保護膜を形成し、電極反応によるガス発
生を低減できる。特に、側鎖にアルキル基を有する長鎖
二塩基性酸とともに用いた場合に、その効果が増大する
。(Function) Phytic acid reacts with aluminum to form a more stable protective film on the electrode surface than phosphoric acid, and can reduce gas generation due to electrode reactions. In particular, the effect is enhanced when used together with a long chain dibasic acid having an alkyl group in the side chain.
（３） （実施例） 以下、本発明を実施例に基づいて説明する。(3) (Example) Hereinafter, the present invention will be explained based on examples.
溶媒はエチレングリコールやジエチレングリコール等の
多価アルコールを主成分として用いる。The main component of the solvent is polyhydric alcohol such as ethylene glycol or diethylene glycol.
溶質は、炭素１２で側鎖にアルキル基を有する長鎖二塩
基性酸またはその塩のうち少なくとも一種類を用い、例
えば、１．６−デカンジカルボン酸、２．５−デカンジ
カルボン酸、５．６−デカンジカルボン酸、６．７−デ
カンジカルボン酸、６−エチル−１，６−オクタンジカ
ルボン酸やそれ等の塩を用いる。As the solute, at least one type of long chain dibasic acid having carbon 12 and an alkyl group in the side chain or a salt thereof is used, such as 1.6-decanedicarboxylic acid, 2.5-decanedicarboxylic acid, 5. 6-decanedicarboxylic acid, 6.7-decanedicarboxylic acid, 6-ethyl-1,6-octanedicarboxylic acid and salts thereof are used.
また、添加するフィチン酸の添加量は、０．０１〜２．
Ｑｗｔ％が好ましく、０．０１ｗｔ％未満では効果が低
く、２．Ｑｗｔ％より多くなると火花電圧が降下する。Further, the amount of phytic acid added is 0.01 to 2.
Qwt% is preferable, and if it is less than 0.01wt%, the effect is low; 2. If it exceeds Qwt%, the spark voltage will drop.
次に、表１の通りの組成からなる実施例と従来例の電解
液について、ガス発生試験を行なった。Next, a gas generation test was conducted on the electrolytic solutions of the example and the conventional example having the compositions shown in Table 1.
試験条件は、温度１３０℃の電解液中に表面１４００
ｃｄのアルミニウムエツチド箔を浸漬し、２５Ｑｈｒ後
および５００ｈｒ後の、局部電池作用による（４）
ガス発生量を測定した。The test conditions were a surface of 1400°C in an electrolyte at a temperature of 130°C.
CD aluminum etched foil was immersed, and the amount of gas generated (4) due to local battery action was measured after 25 Qhr and 500 hr.
また、これ等の電解液を含浸した、定格４００Ｖ、３３
０μＦのアルミ電解コンデンサについて高温負荷試験を
行ない、漏れ電流を測定した。高温負荷試験条件は、温
度１１０℃、印加電圧４００Ｖ１放置時間１０００ｈｒ
とする。そして漏れ電流は、試料を温度２０℃の雰囲気
中に２４ｈ「放置後、電圧４００Ｖを印加し、５分後の
値を測定する。測定結果は表２に示した。Also, impregnated with these electrolytes, rated at 400V, 33
A high temperature load test was conducted on a 0 μF aluminum electrolytic capacitor, and the leakage current was measured. High temperature load test conditions are temperature 110℃, applied voltage 400V, and standing time 1000 hours.
shall be. The leakage current was determined by leaving the sample in an atmosphere at a temperature of 20° C. for 24 hours, applying a voltage of 400 V, and measuring the value after 5 minutes. The measurement results are shown in Table 2.
以下余白。Margin below.
（５）
〔６）
表２
表２から明らかな通り、ガス発生量は本発明の実施例の
電解液を含浸したＮｏ、 １〜Ｎｏ、 ７が２５０ｈｒ
後で０蛇、５００ｈｒｔ’０．３〜０．９ｄｔ’、従来
の電解液を含浸したＮｏ、 ８〜Ｎｏ、 １２が、２５
Ｏｈｒ後で
（７）
０．４〜３．８ｄ、５００ｈｒで３．８〜１０．６−と
なる。すなわち、前者による方が後者の場合よりもガス
発生が抑えられ、５００ｈｒ後にお０ても約３％〜２４
％に減少できる。また、漏れ電流についても、Ｎｏ１〜
Ｎ０．７は初期値が３０〜４５μＡ１試験後が２６〜４
０μＡ、ＮＯ，８〜ＮＱ１２は初期値が１１０〜１７５
μＡ１試験後が１４０〜３５０μＡとなり、前者の方が
初期値が約１７％〜４１％、試験後で約７％〜２９％に
抑えられる。(5) [6] Table 2 As is clear from Table 2, the amount of gas generated was 250 hours for No. 1 to No. 7 impregnated with the electrolytic solution of the example of the present invention.
Later 0 snake, 500hr'0.3-0.9dt', No. 8-No. 12, 25 impregnated with conventional electrolyte
After Ohr (7) it becomes 0.4-3.8d, and after 500hr it becomes 3.8-10.6-. In other words, the former case suppresses gas generation more than the latter case, and even after 500 hours, the gas generation is reduced by about 3% to 24%.
It can be reduced to %. Also, regarding leakage current, No. 1~
The initial value of N0.7 is 30-45 μA, and the value after the 1 test is 26-4.
0μA, NO, 8~NQ12 initial value is 110~175
The value after the μA1 test is 140 to 350 μA, and the initial value of the former is about 17% to 41%, which is suppressed to about 7% to 29% after the test.
（発明の効果）
以上の通り、本発明によれば、フィチン酸を添加するこ
とによりガス発生を減少でき、電解コンデンサに含浸し
た場合にはガス発生による不良を抑制できるとともに、
漏れ電流特性等を改良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, gas generation can be reduced by adding phytic acid, and when it is impregnated into an electrolytic capacitor, defects due to gas generation can be suppressed.
An electrolytic solution for electrolytic capacitors that can improve leakage current characteristics and the like can be obtained.
Claims (1)
２で側鎖にアルキル基を有する長鎖二塩基性酸またはそ
の塩の少なくとも一種類を溶解した電解コンデンサ用電
解液において、フィチン酸を添加することを特徴とする
電解コンデンサ用電解液。(1) In a solvent mainly composed of polyhydric alcohols, the number of carbon atoms is 1.
2. An electrolytic solution for an electrolytic capacitor in which at least one long-chain dibasic acid having an alkyl group in a side chain or a salt thereof is dissolved in the electrolytic solution for an electrolytic capacitor, characterized in that phytic acid is added thereto.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2063590A JPH03225907A (en) | 1990-01-31 | 1990-01-31 | Electrolyte for electrolytic capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2063590A JPH03225907A (en) | 1990-01-31 | 1990-01-31 | Electrolyte for electrolytic capacitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03225907A true JPH03225907A (en) | 1991-10-04 |
Family
ID=12032690
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2063590A Pending JPH03225907A (en) | 1990-01-31 | 1990-01-31 | Electrolyte for electrolytic capacitor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03225907A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61164216A (en) * | 1985-01-17 | 1986-07-24 | 三洋電機株式会社 | Electrolytic liquid for driving electrolytic capacitor |
| JPS6354209A (en) * | 1986-08-26 | 1988-03-08 | 三井建設株式会社 | Manufacture of resin concrete |
-
1990
- 1990-01-31 JP JP2063590A patent/JPH03225907A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61164216A (en) * | 1985-01-17 | 1986-07-24 | 三洋電機株式会社 | Electrolytic liquid for driving electrolytic capacitor |
| JPS6354209A (en) * | 1986-08-26 | 1988-03-08 | 三井建設株式会社 | Manufacture of resin concrete |
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