JPH0722085B2 - Electrolytic solution for driving aluminum electrolytic capacitors - Google Patents
Electrolytic solution for driving aluminum electrolytic capacitorsInfo
- Publication number
- JPH0722085B2 JPH0722085B2 JP12650687A JP12650687A JPH0722085B2 JP H0722085 B2 JPH0722085 B2 JP H0722085B2 JP 12650687 A JP12650687 A JP 12650687A JP 12650687 A JP12650687 A JP 12650687A JP H0722085 B2 JPH0722085 B2 JP H0722085B2
- Authority
- JP
- Japan
- Prior art keywords
- electrolytic solution
- solution
- electrolytic
- driving
- copper
- 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
- 239000008151 electrolyte solution Substances 0.000 title claims description 16
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims description 10
- 229910052782 aluminium Inorganic materials 0.000 title claims description 10
- 239000003990 capacitor Substances 0.000 title claims description 8
- 239000000654 additive Substances 0.000 claims description 12
- 230000000996 additive effect Effects 0.000 claims description 10
- YXIWHUQXZSMYRE-UHFFFAOYSA-N 1,3-benzothiazole-2-thiol Chemical compound C1=CC=C2SC(S)=NC2=C1 YXIWHUQXZSMYRE-UHFFFAOYSA-N 0.000 claims description 8
- YEJRWHAVMIAJKC-UHFFFAOYSA-N 4-Butyrolactone Chemical compound O=C1CCCO1 YEJRWHAVMIAJKC-UHFFFAOYSA-N 0.000 claims description 8
- 239000002904 solvent Substances 0.000 claims description 8
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 claims description 4
- 239000012964 benzotriazole Substances 0.000 claims description 4
- WNAHIZMDSQCWRP-UHFFFAOYSA-N dodecane-1-thiol Chemical compound CCCCCCCCCCCCS WNAHIZMDSQCWRP-UHFFFAOYSA-N 0.000 claims description 4
- ORTRWBYBJVGVQC-UHFFFAOYSA-N hexadecane-1-thiol Chemical compound CCCCCCCCCCCCCCCCS ORTRWBYBJVGVQC-UHFFFAOYSA-N 0.000 claims description 4
- 150000003839 salts Chemical class 0.000 claims description 4
- 150000001732 carboxylic acid derivatives Chemical class 0.000 claims description 3
- 239000000243 solution Substances 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 11
- 229910052802 copper Inorganic materials 0.000 description 11
- 239000010949 copper Substances 0.000 description 11
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 9
- 230000000694 effects Effects 0.000 description 5
- 239000011888 foil Substances 0.000 description 5
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 description 2
- 150000003863 ammonium salts Chemical class 0.000 description 2
- 150000007524 organic acids Chemical class 0.000 description 2
- 235000011037 adipic acid Nutrition 0.000 description 1
- 239000001361 adipic acid Substances 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000010828 elution Methods 0.000 description 1
- -1 organic acid salt Chemical class 0.000 description 1
- VRUJCFSQHOLHRM-UHFFFAOYSA-L phthalate;tetramethylazanium Chemical compound C[N+](C)(C)C.C[N+](C)(C)C.[O-]C(=O)C1=CC=CC=C1C([O-])=O VRUJCFSQHOLHRM-UHFFFAOYSA-L 0.000 description 1
- 238000001226 reprecipitation Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明はアルミニウム電解コンデンサの駆動用電解液
（以下電解液という）に関するものである。TECHNICAL FIELD The present invention relates to an electrolytic solution for driving an aluminum electrolytic capacitor (hereinafter referred to as electrolytic solution).
従来の技術 従来、電解液としてはエチレングリコールを主体とした
溶媒にアジピン酸または塩を溶解した電解液が多用され
ている。2. Description of the Related Art Conventionally, as an electrolytic solution, an electrolytic solution in which adipic acid or a salt is dissolved in a solvent mainly composed of ethylene glycol is often used.
このような有機酸のアンモニウム塩を使用している電解
液では、コンデンサを長時間放置するとアルミニウム電
極箔中に銅が含有している場合には銅が溶解し、さらに
は再析出し、この再析出が著しい場合には電極間の短絡
を起こし、コンデンサの機能が失われ現象が生じる。In an electrolytic solution using such an ammonium salt of an organic acid, when the capacitor is left for a long time, copper is dissolved in the aluminum electrode foil if it is contained in the aluminum electrode foil, and then copper is re-precipitated. If the deposition is remarkable, a short circuit occurs between the electrodes, and the function of the capacitor is lost, causing a phenomenon.
そのため、主溶媒にエチレングリコールを、副溶媒に水
を用い、溶質に有機酸のアンモニウム塩を添加剤として
ベンゾトリアゾール、２−メルカプトベンゾチアゾー
ル、ドデシルメルカプタン、セチルメルカプタンなどを
用いた電解液が試みられていた。For this reason, ethylene glycol is used as the main solvent, water is used as the sub-solvent, and an electrolyte solution using benzotriazole, 2-mercaptobenzothiazole, dodecyl mercaptan, cetyl mercaptan, etc. as an additive with an ammonium salt of an organic acid as a solute is tried. Was there.
発明が解決しようとする問題点 しかし上述の添加剤は、電解液として高温で溶解させて
も常温に戻すと白濁してくる。95℃以上の高温に連続使
用できないなどの欠点があった。Problems to be Solved by the Invention However, even if the above-mentioned additive is dissolved as an electrolytic solution at high temperature, it becomes cloudy when returned to normal temperature. It had the drawback that it could not be used continuously at high temperatures above 95 ° C.
そこで、電極間距離を確保するため厚いセパレータを使
用することが検討されていたが、電気特性の低下、小形
化への障害となっていた。Therefore, it has been considered to use a thick separator in order to secure the distance between the electrodes, but this has been an obstacle to the deterioration of the electrical characteristics and the miniaturization.
問題点を解決するための手段 本発明は上述の問題点を解決するため、γ−ブチロラク
トンを主溶媒とし、カルボン酸およびその塩を溶解して
なる溶液に添加剤として0.01wt％以上のベンゾトリアゾ
ール、２−メルカプトベンゾチアゾール、ドデシルメル
カプタンおよびセチルメルカプタンのうち少なくとも一
種類を添加したことを特徴とする電解液である。Means for Solving the Problems In order to solve the above problems, the present invention uses γ-butyrolactone as a main solvent, and 0.01 wt% or more of benzotriazole as an additive in a solution in which a carboxylic acid and a salt thereof are dissolved. , 2-mercaptobenzothiazole, dodecyl mercaptan, and cetyl mercaptan are added.
また上記添加剤は、0.01wt％以上含有することが望まし
い。Further, it is desirable that the above additive is contained in an amount of 0.01 wt% or more.
作用 上記の添加剤は、アルミニウム電極箔に存在する銅表面
に吸着し、電解液中に溶出する銅の濃度を著しく抑制す
るものである。Action The above-mentioned additive is adsorbed on the copper surface existing on the aluminum electrode foil and remarkably suppresses the concentration of copper eluted in the electrolytic solution.
実施例 以下、本発明の実施例を主溶媒のγ−ブチロラクトン70
wt％にエチレングリコール10wt％、テトラメチルアンモ
ニウムフタレート20wt％を配合した通常の電解液および
この電解液に各添加剤を0.01wt％、0.4wt％添加した電
解液に銅片を浸漬させ、95℃、1000時間に溶出した銅量
を第１表に示す。Examples Hereinafter, examples of the present invention, the main solvent γ-butyrolactone 70
A copper piece is dipped in an ordinary electrolyte solution containing 10 wt% of ethylene glycol and 20 wt% of tetramethylammonium phthalate in wt% and an electrolyte solution of 0.01 wt% and 0.4 wt% of each additive added to this electrolyte solution at 95 ° C. The amount of copper eluted at 1000 hours is shown in Table 1.
なお、銅片（99.9％）は１×４×5mmのサイズのものを
用い、電解液量は10mlとした。The copper pieces (99.9%) used had a size of 1 × 4 × 5 mm, and the amount of electrolyte was 10 ml.
第１表よりいずれの添加剤も銅の溶出を抑制する効果が
確認された。 From Table 1, it was confirmed that all the additives have the effect of suppressing the elution of copper.
さらに、銅を１％含有するアルミニウム箔を陰極とし
て、前述の電解液を用いて16WV 220μＦのコンデンサを
製作し、95℃、500時間の無負荷試験を実施した。その
結果のショート発生個数を第２表に示す。Furthermore, using an aluminum foil containing 1% of copper as a cathode, a 16 WV 220 μF capacitor was manufactured using the above-mentioned electrolytic solution, and a no-load test at 95 ° C. for 500 hours was performed. The resulting number of short circuits is shown in Table 2.
第２表からも、上記の添加剤は銅の溶解、再析出による
電極間のショートを防止する効果が確認できた。 It can be confirmed from Table 2 that the above additives have the effect of preventing short circuit between electrodes due to dissolution and reprecipitation of copper.
また溶媒の種類、配合比および有機酸塩の種類、濃度を
かえて繰り返し試験したが、いずれの条件においても上
述の添加剤の効果が確認された。Further, the test was repeated by changing the kind and mixing ratio of the solvent and the kind and concentration of the organic acid salt, and the effect of the above-mentioned additive was confirmed under any condition.
なお、添加剤は0.01wt％未満では効果が十分ではなく、
また飽和濃度を超ｐる量は好ましくない。If the additive is less than 0.01 wt%, the effect is not sufficient,
Also, an amount exceeding the saturation concentration is not preferable.
発明の効果 以上の結果から明らかなように、γ−ブチロラクトンを
主溶媒とし、カルボン酸およびその塩を溶解してなる溶
液に添加剤として0.01wt％以上のベンゾトリアゾール、
２−メルカプトベンゾチアゾール、ドデシルメルカプタ
ンおよびセチルメルカプタンのうち少なくとも一種類を
添加したことを特徴とするアルミニウム電解コンデンサ
の駆動用電解液は、アルミニウム電極箔中に銅が含有し
ている場合においても、電気特性の低下、小形化への障
害となることなしに、電極間の短絡、ショートを防止で
き、工業的ならびに実用的価値の大なるものである。Effects of the Invention As is clear from the above results, 0.01 wt% or more of benzotriazole as an additive in a solution in which γ-butyrolactone is used as a main solvent and a carboxylic acid and a salt thereof are dissolved,
2-mercaptobenzothiazole, dodecyl mercaptan and cetyl mercaptan at least one type of addition, the driving electrolytic solution of the aluminum electrolytic capacitor, even when copper is contained in the aluminum electrode foil, It is possible to prevent short-circuiting between electrodes and short-circuiting without impairing the characteristics and obstructing the miniaturization, which is of great industrial and practical value.
Claims (2)
ン酸およびその塩を溶解してなる溶液に添加剤としてベ
ンゾトリアゾール、２−メルカプトベンゾチアゾール、
ドデシルメルカプタンおよびセチルメルカプタンのうち
少なくとも一種類を添加したことを特徴とするアルミニ
ウム電解コンデンサの駆動用電解液。1. Benzotriazole, 2-mercaptobenzothiazole, as an additive to a solution prepared by dissolving carboxylic acid and its salt using γ-butyrolactone as a main solvent.
At least one kind of dodecyl mercaptan and cetyl mercaptan is added to the electrolytic solution for driving an aluminum electrolytic capacitor.
る特許請求の範囲第１項記載のアルミニウム電解コンデ
ンサの駆動用電解液。2. The electrolytic solution for driving an aluminum electrolytic capacitor according to claim 1, wherein the added amount is 0.01 wt% or more in a weight ratio.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12650687A JPH0722085B2 (en) | 1987-05-22 | 1987-05-22 | Electrolytic solution for driving aluminum electrolytic capacitors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12650687A JPH0722085B2 (en) | 1987-05-22 | 1987-05-22 | Electrolytic solution for driving aluminum electrolytic capacitors |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63291414A JPS63291414A (en) | 1988-11-29 |
| JPH0722085B2 true JPH0722085B2 (en) | 1995-03-08 |
Family
ID=14936893
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12650687A Expired - Lifetime JPH0722085B2 (en) | 1987-05-22 | 1987-05-22 | Electrolytic solution for driving aluminum electrolytic capacitors |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0722085B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006028072A1 (en) * | 2004-09-07 | 2006-03-16 | Matsushita Electric Industrial Co., Ltd. | Electrolyte for electrolytic capacitor and electrolytic capacitor utilizing the same |
| JP2007142353A (en) | 2005-10-17 | 2007-06-07 | Matsushita Electric Ind Co Ltd | Aluminum electrolytic capacitor |
-
1987
- 1987-05-22 JP JP12650687A patent/JPH0722085B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63291414A (en) | 1988-11-29 |
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