JPH04359417A - Electrolyte for driving electrolytic capacitor - Google Patents
Electrolyte for driving electrolytic capacitorInfo
- Publication number
- JPH04359417A JPH04359417A JP16214891A JP16214891A JPH04359417A JP H04359417 A JPH04359417 A JP H04359417A JP 16214891 A JP16214891 A JP 16214891A JP 16214891 A JP16214891 A JP 16214891A JP H04359417 A JPH04359417 A JP H04359417A
- Authority
- JP
- Japan
- Prior art keywords
- electrolytic
- electrolytic solution
- electrolytic capacitor
- salt
- mannitol
- 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.)
- Granted
Links
- 239000003990 capacitor Substances 0.000 title claims abstract description 10
- 239000003792 electrolyte Substances 0.000 title description 7
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims abstract description 18
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 claims abstract description 10
- FBPFZTCFMRRESA-KVTDHHQDSA-N D-Mannitol Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-KVTDHHQDSA-N 0.000 claims abstract description 8
- 229930195725 Mannitol Natural products 0.000 claims abstract description 8
- 239000000594 mannitol Substances 0.000 claims abstract description 8
- 235000010355 mannitol Nutrition 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 8
- 235000011037 adipic acid Nutrition 0.000 claims abstract description 5
- 239000001361 adipic acid Substances 0.000 claims abstract description 5
- 239000008151 electrolyte solution Substances 0.000 claims description 21
- CXMXRPHRNRROMY-UHFFFAOYSA-N sebacic acid Chemical compound OC(=O)CCCCCCCCC(O)=O CXMXRPHRNRROMY-UHFFFAOYSA-N 0.000 claims description 12
- 150000003839 salts Chemical class 0.000 claims description 9
- 150000007524 organic acids Chemical class 0.000 claims description 8
- 150000004676 glycans Chemical class 0.000 claims description 7
- 229920001282 polysaccharide Polymers 0.000 claims description 7
- 239000005017 polysaccharide Substances 0.000 claims description 7
- 239000002904 solvent Substances 0.000 claims description 5
- FBPFZTCFMRRESA-FSIIMWSLSA-N D-Glucitol Natural products OC[C@H](O)[C@H](O)[C@@H](O)[C@H](O)CO FBPFZTCFMRRESA-FSIIMWSLSA-N 0.000 claims description 4
- FBPFZTCFMRRESA-JGWLITMVSA-N D-glucitol Chemical compound OC[C@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-JGWLITMVSA-N 0.000 claims description 4
- 239000000600 sorbitol Substances 0.000 claims description 4
- 239000000243 solution Substances 0.000 claims description 3
- 239000012046 mixed solvent Substances 0.000 claims 2
- 239000007788 liquid Substances 0.000 abstract 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XNGIFLGASWRNHJ-UHFFFAOYSA-N phthalic acid Chemical compound OC(=O)C1=CC=CC=C1C(O)=O XNGIFLGASWRNHJ-UHFFFAOYSA-N 0.000 description 4
- 150000003242 quaternary ammonium salts Chemical class 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 238000006703 hydration reaction Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- -1 is 3 wt% or more Chemical class 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 235000005985 organic acids Nutrition 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Electric Double-Layer Capacitors Or The Like (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は、高温度において安定し
た特性を有する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。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrolytic solution for driving an electrolytic capacitor (hereinafter referred to as electrolytic solution) having stable characteristics at high temperatures.
【０００２】0002
【従来の技術】従来より低圧用電解液としては、エチレ
ングリコ−ルを主溶媒とし、有機酸あるいはその塩を溶
解してなる電解液が用いられてきた。BACKGROUND OF THE INVENTION Conventionally, as a low-pressure electrolytic solution, an electrolytic solution prepared by using ethylene glycol as a main solvent and dissolving an organic acid or its salt has been used.
【０００３】0003
【発明が解決しようとする課題】近年、アルミニウム電
解コンデンサの低インピ−ダンス化、小型化、高信頼化
に伴い、電解液としては比抵抗が低く、広温度範囲で安
定な電解液が要求されているが、エチレングリコ−ルを
主溶媒とし、有機酸あるいはその塩を溶解してなる電解
液においては、比抵抗を低くするために、電解液中の水
分の配合比を増大すると高温度雰囲気下における信頼性
が著しく低下するなどの問題を有するため、１０５℃品
用電解液としては、γ−ブチロラクトンを主溶媒とし、
フタル酸の４級アンモニウム塩を溶解した電解液が一般
に用いられている。しかしながら、この電解液へ使用す
るフタル酸の４級アンモニウム塩は薬品コストが非常に
高いため、〔エチレングリコ−ル＋水〕系電解液での１
０５℃対応が望まれていた。[Problems to be Solved by the Invention] In recent years, as aluminum electrolytic capacitors have become lower in impedance, smaller in size, and more reliable, electrolytic solutions that have low resistivity and are stable over a wide temperature range are required. However, in an electrolytic solution formed by dissolving an organic acid or its salt in ethylene glycol as the main solvent, increasing the water content in the electrolytic solution in order to lower the resistivity causes a high-temperature atmosphere. Since there are problems such as a significant decrease in reliability under
An electrolytic solution in which a quaternary ammonium salt of phthalic acid is dissolved is generally used. However, the quaternary ammonium salt of phthalic acid used in this electrolyte has a very high chemical cost, so
05℃ compatibility was desired.
【０００４】0004
【課題を解決するための手段】本発明は上述の課題を解
決するためのものであり、すなわち、エチレングリコ−
ルを主溶媒とし、７ ｗｔ％ 以上のアジピン酸を主体
とした有機酸あるいはその塩および １０ ｗｔ％ 以
上の水分を溶解してなる溶液中に、有機酸としてセバシ
ン酸あるいはその塩が配合され、かつ、マンニット，ソ
ルビットなどの多糖類の中から選ばれる少なくとも１種
以上を添加したことを特徴とする電解液である。[Means for Solving the Problems] The present invention is intended to solve the above-mentioned problems.
Sebacic acid or its salt is blended as an organic acid in a solution prepared by dissolving 7 wt% or more of an organic acid or its salt mainly consisting of adipic acid and 10 wt% or more of water in silica as the main solvent, Moreover, the electrolytic solution is characterized by adding at least one kind selected from polysaccharides such as mannitol and sorbitol.
【０００５】[0005]
【作用】本発明に係る電解液は、電解液の低比抵抗化に
伴う多量の水分配合においてもアルミニウム電極箔の水
和を防止し、高温雰囲気中においての信頼性を著しく向
上する。[Function] The electrolytic solution according to the present invention prevents hydration of the aluminum electrode foil even when a large amount of water is added due to the reduction in specific resistance of the electrolytic solution, and significantly improves reliability in a high-temperature atmosphere.
【０００６】[0006]
【実施例】以下、本発明の実施例について説明する。表
１は本発明の電解液と従来の電解液の組成、比抵抗およ
び火花発生電圧についての比較例を示す。表１中電解液
試料記号Ａ，Ｂは従来例、Ｃ，Ｄ，Ｅ，Ｆは本発明例で
ある。[Examples] Examples of the present invention will be described below. Table 1 shows comparative examples of the composition, resistivity, and spark generation voltage of the electrolytic solution of the present invention and a conventional electrolytic solution. In Table 1, electrolyte sample symbols A and B are conventional examples, and C, D, E, and F are examples of the present invention.
【０００７】[0007]
【表１】[Table 1]
【０００８】表１から明らかなように、本発明に係る試
料記号Ｃ，Ｄ，Ｅ，Ｆの電解液は従来の電解液に比べ耐
電圧が向上している。表２は、表１に示す電解液を用い
て試作した定格 ２５ Ｖ ３３００ μＦのアルミ
ニウム電解コンデンサの １０５℃ ２０００時間高
温負荷試験を行なった結果を示す。As is clear from Table 1, the electrolytic solutions of sample symbols C, D, E, and F according to the present invention have improved dielectric strength compared to conventional electrolytic solutions. Table 2 shows the results of a high-temperature load test at 105° C. for 2000 hours on an aluminum electrolytic capacitor with a rating of 25 V and 3300 μF that was prototyped using the electrolyte shown in Table 1.
【０００９】[0009]
【表２】[Table 2]
【００１０】表２から明らかなように、本発明に係る試
料記号Ｃ，Ｄ，Ｅ，Ｆの電解液を用いた電解コンデンサ
は、従来の電解液を用いた電解コンデンサに比べ、高温
度雰囲気中における信頼性が非常に向上し、かつ安価な
〔エチレングリコ−ル＋水〕系電解液での１０５℃対応
が可能となった。なお、セバシン酸およびマンニットな
どの多糖類の配合量が ０．５ ｗｔ％ 以下の場合に
は上記の特性が得られず、また、セバシン酸の配合量が
５ ｗｔ％ 以上、あるいは、マンニットなどの多糖
類の配合量が ３ ｗｔ％ 以上の場合には、電解液の
析出が生じてしまう。[0010] As is clear from Table 2, the electrolytic capacitors using electrolytes with sample numbers C, D, E, and F according to the present invention are more durable in high-temperature atmospheres than electrolytic capacitors using conventional electrolytes. The reliability has been greatly improved, and it has become possible to handle temperatures of 105°C using an inexpensive [ethylene glycol + water] electrolyte. Note that the above characteristics cannot be obtained if the amount of polysaccharides such as sebacic acid and mannitol is less than 0.5 wt%, and if the amount of sebacic acid is 5 wt% or more, or if the amount of polysaccharides such as mannitol is less than 0.5 wt%, If the blending amount of polysaccharides such as is 3 wt% or more, precipitation of the electrolytic solution will occur.
【００１１】[0011]
【発明の効果】以上の結果から明らかなように、エチレ
ングリコ−ルを主溶媒とし、７ ｗｔ％ 以上のアジピ
ン酸を主体とした有機酸あるいはその塩 および １０
ｗｔ％ 以上の水分を溶解してなる溶液中に、有機酸
としてセバシン酸あるいはその塩が配合され、かつ、マ
ンニット，ソルビットなどの多糖類の中から選ばれる少
なくとも１種以上を添加したことを特徴とする電解液は
、アルミニウム電極箔の水和反応を防止し、広温度範囲
において優れた特性を示し、かつ、４級アンモニウム塩
を用いた電解液に比べ非常に安価であるため、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, organic acids or salts thereof containing 7 wt% or more of adipic acid, using ethylene glycol as the main solvent, and 10
Sebacic acid or its salt is blended as an organic acid in a solution containing more than wt% of water, and at least one selected from polysaccharides such as mannitol and sorbitol is added. The characteristic electrolytic solution prevents the hydration reaction of aluminum electrode foil, exhibits excellent properties over a wide temperature range, and is much cheaper than electrolytic solutions using quaternary ammonium salts, making it suitable for industrial use. It also has great practical value.
Claims (3)
ｗｔ％ 以上のアジピン酸を主体とした有機酸あるい
はその塩および １０ ｗｔ％ 以上の水分を溶解して
なる溶液中に、有機酸としてセバシン酸あるいはその塩
が配合され、かつ、マンニット，ソルビットなどの多糖
類の中から選ばれる少なくとも１種以上を添加したこと
を特徴とする電解コンデンサの駆動用電解液。[Claim 1] Ethylene glycol is the main solvent, and 7
Sebacic acid or its salt is blended as an organic acid in a solution prepared by dissolving an organic acid or a salt thereof mainly consisting of adipic acid in an amount of 10 wt% or more, and a water content of 10 wt% or more, and mannitol, sorbitol, etc. An electrolytic solution for driving an electrolytic capacitor, characterized in that at least one kind selected from polysaccharides is added thereto.
合溶媒 １００ ｇに対し０．５ 〜 ５ ｇ 存在
することを特徴とする請求項１の電解コンデンサの駆動
用電解液。2. The electrolytic solution for driving an electrolytic capacitor according to claim 1, wherein the sebacic acid or its salt is present in an amount of 0.5 to 5 g per 100 g of the mixed solvent.
糖類は、混合溶媒 １００ｇ に対し ０．５〜 ３
ｇ存在することを特徴とする請求項１の電解コンデンサ
の駆動用電解液。3. The polysaccharide such as mannitol and sorbitol is added in an amount of 0.5 to 3 per 100 g of the mixed solvent.
The electrolytic solution for driving an electrolytic capacitor according to claim 1, characterized in that g is present.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16214891A JP3212322B2 (en) | 1991-06-05 | 1991-06-05 | Electrolyte for driving electrolytic capacitors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16214891A JP3212322B2 (en) | 1991-06-05 | 1991-06-05 | Electrolyte for driving electrolytic capacitors |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04359417A true JPH04359417A (en) | 1992-12-11 |
| JP3212322B2 JP3212322B2 (en) | 2001-09-25 |
Family
ID=15748953
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16214891A Expired - Lifetime JP3212322B2 (en) | 1991-06-05 | 1991-06-05 | Electrolyte for driving electrolytic capacitors |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3212322B2 (en) |
-
1991
- 1991-06-05 JP JP16214891A patent/JP3212322B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JP3212322B2 (en) | 2001-09-25 |
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