JPH10106895A - Electrolyte for electrolytic capacitor - Google Patents
Electrolyte for electrolytic capacitorInfo
- Publication number
- JPH10106895A JPH10106895A JP8278692A JP27869296A JPH10106895A JP H10106895 A JPH10106895 A JP H10106895A JP 8278692 A JP8278692 A JP 8278692A JP 27869296 A JP27869296 A JP 27869296A JP H10106895 A JPH10106895 A JP H10106895A
- Authority
- JP
- Japan
- Prior art keywords
- acid
- electrolytic capacitor
- solvent
- polyethylene glycol
- electrolyte
- 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 23
- 239000003792 electrolyte Substances 0.000 title abstract 3
- 229920001223 polyethylene glycol Polymers 0.000 claims abstract description 15
- 239000002202 Polyethylene glycol Substances 0.000 claims abstract description 14
- 150000003839 salts Chemical class 0.000 claims abstract description 11
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000004327 boric acid Substances 0.000 claims abstract description 8
- 239000002904 solvent Substances 0.000 claims abstract description 8
- 150000005846 sugar alcohols Polymers 0.000 claims abstract description 6
- 239000008151 electrolyte solution Substances 0.000 claims description 15
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 abstract description 12
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 abstract description 6
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 abstract description 6
- PUPZLCDOIYMWBV-UHFFFAOYSA-N (+/-)-1,3-Butanediol Chemical compound CC(O)CCO PUPZLCDOIYMWBV-UHFFFAOYSA-N 0.000 abstract description 4
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 abstract description 4
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 abstract description 4
- WPYMKLBDIGXBTP-UHFFFAOYSA-N benzoic acid Chemical compound OC(=O)C1=CC=CC=C1 WPYMKLBDIGXBTP-UHFFFAOYSA-N 0.000 abstract description 4
- WERYXYBDKMZEQL-UHFFFAOYSA-N butane-1,4-diol Chemical compound OCCCCO WERYXYBDKMZEQL-UHFFFAOYSA-N 0.000 abstract description 4
- BDJRBEYXGGNYIS-UHFFFAOYSA-N nonanedioic acid Chemical compound OC(=O)CCCCCCCC(O)=O BDJRBEYXGGNYIS-UHFFFAOYSA-N 0.000 abstract description 4
- CXMXRPHRNRROMY-UHFFFAOYSA-N sebacic acid Chemical compound OC(=O)CCCCCCCCC(O)=O CXMXRPHRNRROMY-UHFFFAOYSA-N 0.000 abstract description 4
- 150000007524 organic acids Chemical class 0.000 abstract description 3
- 239000005711 Benzoic acid Substances 0.000 abstract description 2
- 239000001361 adipic acid Substances 0.000 abstract description 2
- 235000011037 adipic acid Nutrition 0.000 abstract description 2
- 235000010233 benzoic acid Nutrition 0.000 abstract description 2
- 235000011187 glycerol Nutrition 0.000 abstract description 2
- 235000005985 organic acids Nutrition 0.000 abstract description 2
- GHVNFZFCNZKVNT-UHFFFAOYSA-N decanoic acid Chemical compound CCCCCCCCCC(O)=O GHVNFZFCNZKVNT-UHFFFAOYSA-N 0.000 abstract 2
- 239000005632 Capric acid (CAS 334-48-5) Substances 0.000 abstract 1
- 239000002253 acid Substances 0.000 abstract 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 8
- 239000011888 foil Substances 0.000 description 6
- 229910052782 aluminium Inorganic materials 0.000 description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 5
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- -1 phosphorus compound Chemical class 0.000 description 5
- 150000002500 ions Chemical class 0.000 description 4
- 239000000654 additive Substances 0.000 description 3
- 230000000996 additive effect Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 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 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 229930195725 Mannitol Natural products 0.000 description 2
- 150000002148 esters Chemical class 0.000 description 2
- 239000000594 mannitol Substances 0.000 description 2
- 235000010355 mannitol Nutrition 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- WWZKQHOCKIZLMA-UHFFFAOYSA-N octanoic acid Chemical compound CCCCCCCC(O)=O WWZKQHOCKIZLMA-UHFFFAOYSA-N 0.000 description 2
- ACVYVLVWPXVTIT-UHFFFAOYSA-N phosphinic acid Chemical compound O[PH2]=O ACVYVLVWPXVTIT-UHFFFAOYSA-N 0.000 description 2
- WYXIGTJNYDDFFH-UHFFFAOYSA-Q triazanium;borate Chemical compound [NH4+].[NH4+].[NH4+].[O-]B([O-])[O-] WYXIGTJNYDDFFH-UHFFFAOYSA-Q 0.000 description 2
- BQNDPALRJDCXOY-UHFFFAOYSA-N 2,3-dibutylbutanedioic acid Chemical compound CCCCC(C(O)=O)C(C(O)=O)CCCC BQNDPALRJDCXOY-UHFFFAOYSA-N 0.000 description 1
- OWCLRJQYKBAMOL-UHFFFAOYSA-N 2-butyloctanedioic acid Chemical compound CCCCC(C(O)=O)CCCCCC(O)=O OWCLRJQYKBAMOL-UHFFFAOYSA-N 0.000 description 1
- 239000005635 Caprylic acid (CAS 124-07-2) Substances 0.000 description 1
- 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 description 1
- 238000007743 anodising Methods 0.000 description 1
- 150000001735 carboxylic acids Chemical class 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229960002446 octanoic acid Drugs 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は電解コンデンサ用電
解液に関する。The present invention relates to an electrolytic solution for an electrolytic capacitor.
【０００２】[0002]
【従来の技術】近年、電解コンデンサを組込んだ通信機
器や計測機器等の電気機器の性能が向上するのに伴い、
より電気特性の優れた、寿命の長い電解コンデンサが必
要とされている。ところで、アルミ電解コンデンサ等の
電解コンデンサは、一般に、陽極箔と陰極箔とをセパレ
ータを介して巻回してコンデンサ素子を形成し、これに
電解液を含浸したものをケースに収納して蓋により密封
した構造になっている。そして、陽極箔はアルミニウム
やタンタル等の弁作用金属を陽極酸化してその表面に酸
化皮膜を形成している。通常、この酸化皮膜には陽極箔
中の不純物を原因とする又は亀裂等からなる欠陥部が存
在する。このため、電解コンデンサには漏れ電流が流れ
る。漏れ電流が流れると、陰極箔表面において電解液中
の水分が電気分解され水素ガスが発生する。この発生し
た水素ガスによりケース内の圧力が上昇して所定値に達
すると、ケースや蓋に設けた防爆機構が動作する。この
防爆機構の動作により、電解コンデンサは、コンデンサ
としての正常な機能を果さなくなる。従って、漏れ電流
を低くしてケース等に設けた防爆機構の動作を遅らせ、
これにより電解コンデンサの寿命を長くするために、従
来、酸化皮膜の欠陥部を修復し易い電解液を用いてい
る。この電解液は、例えば、エチレングリコール等の多
価アルコールに、カルボン酸等の有機酸やその塩、ホウ
酸やその塩を溶解した溶液に、リン酸や次亜リン酸等の
リン化合物を添加した組成になっている。2. Description of the Related Art In recent years, as the performance of electric equipment such as communication equipment and measuring equipment incorporating an electrolytic capacitor has been improved,
There is a need for an electrolytic capacitor with better electrical properties and a longer life. By the way, an electrolytic capacitor such as an aluminum electrolytic capacitor is generally formed by winding an anode foil and a cathode foil through a separator to form a capacitor element, which is impregnated with an electrolytic solution, stored in a case, and sealed with a lid. It has a structured structure. The anode foil is formed by anodizing a valve metal such as aluminum or tantalum to form an oxide film on its surface. Normally, the oxide film has a defect caused by impurities in the anode foil or formed by cracks or the like. For this reason, a leakage current flows through the electrolytic capacitor. When a leakage current flows, water in the electrolytic solution is electrolyzed on the surface of the cathode foil to generate hydrogen gas. When the pressure inside the case rises and reaches a predetermined value due to the generated hydrogen gas, the explosion-proof mechanism provided on the case and the lid operates. Due to the operation of the explosion-proof mechanism, the electrolytic capacitor does not perform its normal function as a capacitor. Therefore, the operation of the explosion-proof mechanism provided in the case etc. is delayed by lowering the leakage current,
In order to prolong the life of the electrolytic capacitor, an electrolytic solution which can easily repair a defective portion of the oxide film is used. This electrolytic solution is prepared by adding a phosphorus compound such as phosphoric acid or hypophosphorous acid to a solution obtained by dissolving an organic acid such as carboxylic acid or a salt thereof, or boric acid or a salt thereof in a polyhydric alcohol such as ethylene glycol. The composition is as follows.
【０００３】[0003]
【発明が解決しようとする課題】しかし、従来の電解液
は、酸化皮膜を修復する効果が低く、寿命をより一層長
くし難い欠点がある。However, the conventional electrolytic solution has a low effect of repairing an oxide film and has a drawback that it is difficult to prolong the service life.
【０００４】本発明は、以上の欠点を改良し、電解コン
デンサの寿命を長くできる電解コンデンサ用電解液を提
供することを課題とするものである。An object of the present invention is to provide an electrolytic solution for an electrolytic capacitor which can improve the above-mentioned drawbacks and can extend the life of the electrolytic capacitor.
【０００５】[0005]
【課題を解決するための手段】本発明は、上記の課題を
解決するために、多価アルコールを主成分とする溶媒
に、ホウ酸又はその塩を溶解した電解コンデンサ用電解
液において、平均分子量が５００以上のポリエチレング
リコールを含有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。In order to solve the above-mentioned problems, the present invention provides an electrolytic solution for an electrolytic capacitor in which boric acid or a salt thereof is dissolved in a solvent containing a polyhydric alcohol as a main component. Contains 500 or more polyethylene glycols.
【０００６】ホウ酸やその塩を含む溶液中にポリエチレ
ングリコールが含まれていると、ホウ酸イオンとポリエ
チレングリコールのＯＨ基とがエステル反応して錯イオ
ンを形成する。そしてこの錯イオンにより酸化皮膜が修
復されるものと思われる。しかも、ポリエチレングリコ
ールは立体構造を有しており、従って、錯イオンも立体
構造になっているものと思われる。そのため、エステル
反応をしないホウ酸イオンやアンモニウムイオン等のイ
オンは、平面構造の分子中を移動するのに比較して、移
動し易い。従って、電解液の電導度を低下させて比抵抗
を増大させることなく、酸化皮膜を修復する効果を向上
できる。[0006] When polyethylene glycol is contained in a solution containing boric acid or a salt thereof, borate ions and OH groups of polyethylene glycol undergo an ester reaction to form complex ions. It is considered that the oxide film is repaired by the complex ions. In addition, polyethylene glycol has a three-dimensional structure, and it is considered that the complex ion also has a three-dimensional structure. For this reason, ions such as borate ions and ammonium ions that do not undergo an ester reaction tend to move more easily than molecules in a planar structure. Therefore, the effect of repairing the oxide film can be improved without lowering the conductivity of the electrolytic solution and increasing the specific resistance.
【０００７】[0007]
【発明の実施の形態】以下、本発明の実施の形態を説明
する。溶媒は、エチレングリコールやジエチレングリコ
ール、プロピレングリコール、グリセリン、１，４−ブ
タンジオール、１，３−ブタンジオール等の多価アルコ
ール類を一種類又は二種類以上組合せて主成分として用
いる。溶質は、ホウ酸やその塩の他に、アジピン酸やア
ゼライン酸、１，６−デカンジカルボン酸、５，６−デ
カンジカルボン酸、セバシン酸、カプリル酸、安息香酸
等の有機酸やこれらの塩を用いる。そして上記の溶媒及
び溶質からなる溶液中に平均分子量が５００以上のポリ
エチレングリコールを添加する。なお、平均分子量が５
００未満のポリエチレングリコールでは電解コンデンサ
の寿命を長くする効果がほとんどない。また、平均分子
量が２００００より大きくなるとポリエチレングリコー
ルの溶解量が大きく低下する。従って、平均分子量が２
００００以下のポリエチレングリコールを用いる方が作
業性等の面からより好ましい。なお、添加剤としては、
他に、リン酸や次亜リン酸、マンニット、ソルビット等
を用いる。Embodiments of the present invention will be described below. As the solvent, one or a combination of two or more polyhydric alcohols such as ethylene glycol, diethylene glycol, propylene glycol, glycerin, 1,4-butanediol, and 1,3-butanediol is used as a main component. Solutes include boric acid and salts thereof, as well as organic acids such as adipic acid, azelaic acid, 1,6-decanedicarboxylic acid, 5,6-decanedicarboxylic acid, sebacic acid, caprylic acid, and benzoic acid, and salts thereof. Is used. Then, polyethylene glycol having an average molecular weight of 500 or more is added to a solution comprising the above solvent and solute. The average molecular weight is 5
With a polyethylene glycol of less than 00, there is almost no effect of extending the life of the electrolytic capacitor. On the other hand, when the average molecular weight is larger than 20,000, the dissolution amount of polyethylene glycol is greatly reduced. Therefore, when the average molecular weight is 2
It is more preferable to use polyethylene glycol of 0000 or less from the viewpoint of workability and the like. In addition, as an additive,
In addition, phosphoric acid, hypophosphorous acid, mannitol, sorbite, or the like is used.
【０００８】[0008]
【実施例】次に、本発明の実施例を説明する。実施例の
電解液は、表１に示す通り、エチレングリコール等から
なる溶媒が６５．０〜７０．０wt％、ホウ酸アンモニウ
ムからなる溶質が２０．０wt％、平均分子量Ｍが５００
〜２００００のポリエチレングリコールが１０．０〜１
５．０wt％そしてマンニットやリン酸からなる添加剤が
５．０〜５．１wt％の組成とする。Next, embodiments of the present invention will be described. As shown in Table 1, the electrolyte solution of the example contained 65.0 to 70.0 wt% of a solvent composed of ethylene glycol or the like, 20.0 wt% of a solute composed of ammonium borate, and had an average molecular weight M of 500.
20,000 to 10,000 polyethylene glycol
The composition is 5.0 wt%, and the additive composed of mannitol and phosphoric acid is 5.0 to 5.1 wt%.
【０００９】[0009]
【表１】 [Table 1]
【００１０】[0010]
【表２】 [Table 2]
【００１１】そして、表１に示す組成の実施例と、表２
に示す組成の従来例及び比較例の電解液中に、５３０Ｖ
で陽極酸化した、２×１０cm2角のアルミニウム化成箔
からなる試料片を浸漬し、３ｍＡの定電流を流してこの
試料片の切断面を化成し、４００Ｖの電圧に到達するま
での時間を測定した。測定結果は表１及び表２に示し
た。Examples of the compositions shown in Table 1 and Table 2
530 V in the electrolytic solution of the conventional example and the comparative example having the composition shown in FIG.
A sample piece made of a 2 × 10 cm 2 square aluminum conversion foil anodized in step 2 was immersed, a constant current of 3 mA was passed to form a cut surface of the sample piece, and the time required to reach a voltage of 400 V was measured. did. The measurement results are shown in Tables 1 and 2.
【００１２】表１及び表２から明らかな通り、到達時間
は、実施例１〜実施例７の場合が９０〜１６１秒、従来
例１〜従来例７の場合が１９３〜４６２秒、比較例１〜
比較例４の場合が２２１〜３９２秒となる。すなわち、
実施例１〜実施例７の場合は、従来例１〜従来例７の場
合に比較して約１９．５〜８３．４％、比較例１〜比較
例４の場合に比べて約２３．０〜７２．９％になる。従
って、実施例１〜実施例７の方が、ポリエチレングリコ
ールを添加しない従来例１〜従来例７の場合やホウ酸ア
ンモニウムを溶質としない比較例１〜比較例４の場合よ
りも、酸化皮膜の修復作用が優れていることが明らかで
ある。As is clear from Tables 1 and 2, the arrival time was 90 to 161 seconds in Examples 1 to 7, 193 to 462 seconds in Conventional Examples 1 to 7, and Comparative Example 1 ~
In the case of the comparative example 4, it is 221 to 392 seconds. That is,
In the case of Examples 1 to 7, about 19.5 to 83.4% as compared with the case of Conventional Examples 1 to 7, and about 23.0% as compared with the cases of Comparative Examples 1 to 4. ~ 72.9%. Therefore, Examples 1 to 7 are more likely to have an oxide film than those of Conventional Examples 1 to 7 in which polyethylene glycol is not added and Comparative Examples 1 to 4 in which ammonium borate is not used as a solute. It is clear that the repair action is excellent.
【００１３】また、表１及び表２に示す組成の電解液を
含浸した定格４００Ｖ、３３０μＦ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、漏れ電流及び蓋
に設けた防爆弁が作動した試料数を測定した。この場
合、試験温度を９０℃そして印加電圧を４００Ｖとす
る。なお、漏れ電流は試料を温度３０℃の雰囲気中に放
置して測定した。試料数は各々１０個とする。測定結果
は表３に示した。A high-temperature load test was conducted on a 400 V rated, 330 μF aluminum electrolytic capacitor impregnated with an electrolytic solution having the composition shown in Tables 1 and 2, and the leakage current and the number of samples operated by the explosion-proof valve provided on the lid were determined. It was measured. In this case, the test temperature is 90 ° C. and the applied voltage is 400 V. The leakage current was measured by leaving the sample in an atmosphere at a temperature of 30 ° C. The number of samples is 10 each. Table 3 shows the measurement results.
【００１４】[0014]
【表３】 [Table 3]
【００１５】この表３から明らかな通り、４０００時間
放置後において、実施例１〜実施例７を含浸したアルミ
電解コンデンサは、漏れ電流が０．０７８〜０．６７８
ｍＡ、弁作動数が０〜５個となる。また、従来例１を含
浸したものは破壊し、漏れ電流を測定できなかった。そ
して従来例２〜従来例７を含浸したものは、漏れ電流が
１．０１２〜１．３１２ｍＡ、弁作動数が全数である。
さらに、比較例１〜比較例４を含浸したものは、漏れ電
流が０．９６５〜１．３１２ｍＡ、弁作動数が全数であ
る。従って、実施例１〜実施例７の場合は、漏れ電流が
従来例２〜従来例７の場合に比べて約５．９５〜６７．
０％、そして比較例１〜比較例４の場合に比べて約５．
９５〜７０．３％の大きさである。また、実施例１〜実
施例７の場合は、従来例２〜従来例７及び比較例１〜比
較例４の場合に比べて弁作動数が１／２以下となってい
る。なお、実施例１〜実施例７の場合には、ポリエチレ
ングリコールの平均分子量が大きいほど漏れ電流が小さ
く、弁作動数が少ないことは明らかである。特に、リン
酸を添加剤として含む実施例５〜実施例７の場合は、リ
ン酸を含まない実施例１〜実施例４の場合に比較して、
漏れ電流が約１１．５〜３４．６％に低下している。As is clear from Table 3, after leaving for 4000 hours, the aluminum electrolytic capacitors impregnated with Examples 1 to 7 have leakage currents of 0.078 to 0.678.
mA, the number of valve operations is 0-5. Further, the impregnated Conventional Example 1 was broken, and the leakage current could not be measured. Those impregnated with Conventional Examples 2 to 7 have a leakage current of 1.012 to 1.312 mA and the total number of valve operations.
Further, those impregnated with Comparative Examples 1 to 4 have a leakage current of 0.965 to 1.312 mA and the total number of valve operations is 100. Therefore, in the case of the first to seventh embodiments, the leakage current is about 5.95 to 67.
0%, and about 5.5 compared to Comparative Examples 1 to 4.
The size is 95 to 70.3%. Further, in the case of Examples 1 to 7, the number of valve operations is 1/2 or less as compared with the cases of Conventional Examples 2 to 7 and Comparative Examples 1 to 4. In Examples 1 to 7, it is clear that the larger the average molecular weight of polyethylene glycol, the smaller the leakage current and the smaller the number of valve operations. In particular, in the case of Examples 5 to 7 including phosphoric acid as an additive, compared to the cases of Examples 1 to 4 not including phosphoric acid,
The leakage current has dropped to about 11.5-34.6%.
【００１６】[0016]
【発明の効果】以上の通り、本発明によれば、ホウ酸又
はその塩とともに、平均分子量が５００以上のポリエチ
レングリコールを含有しているため、電解コンデンサの
漏れ電流特性等を改善でき、寿命を長くできる電解コン
デンサ用電解液が得られる。As described above, according to the present invention, since polyethylene glycol having an average molecular weight of 500 or more is contained together with boric acid or a salt thereof, the leakage current characteristics and the like of the electrolytic capacitor can be improved and the life can be improved. An electrolytic solution for an electrolytic capacitor that can be lengthened can be obtained.
Claims (1)
ホウ酸又はその塩を溶解した電解コンデンサ用電解液に
おいて、平均分子量が５００以上のポリエチレングリコ
ールを含有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,
An electrolytic solution for electrolytic capacitors, wherein the electrolytic solution in which boric acid or a salt thereof is dissolved contains polyethylene glycol having an average molecular weight of 500 or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8278692A JPH10106895A (en) | 1996-09-30 | 1996-09-30 | Electrolyte for electrolytic capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8278692A JPH10106895A (en) | 1996-09-30 | 1996-09-30 | Electrolyte for electrolytic capacitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10106895A true JPH10106895A (en) | 1998-04-24 |
Family
ID=17600853
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8278692A Pending JPH10106895A (en) | 1996-09-30 | 1996-09-30 | Electrolyte for electrolytic capacitor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10106895A (en) |
Cited By (2)
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|---|---|---|---|---|
| CN102763181A (en) * | 2010-02-15 | 2012-10-31 | 松下电器产业株式会社 | Electrolytic capacitor |
| WO2017056447A1 (en) * | 2015-09-28 | 2017-04-06 | パナソニックＩｐマネジメント株式会社 | Electrolytic capacitor |
-
1996
- 1996-09-30 JP JP8278692A patent/JPH10106895A/en active Pending
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