JPS6369213A - Electrolytic capacitor - Google Patents
Electrolytic capacitorInfo
- Publication number
- JPS6369213A JPS6369213A JP21261186A JP21261186A JPS6369213A JP S6369213 A JPS6369213 A JP S6369213A JP 21261186 A JP21261186 A JP 21261186A JP 21261186 A JP21261186 A JP 21261186A JP S6369213 A JPS6369213 A JP S6369213A
- Authority
- JP
- Japan
- Prior art keywords
- quaternary ammonium
- electrolytic
- ammonium salt
- electrolytic capacitor
- phthalic acid
- 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 description 24
- 239000003792 electrolyte Substances 0.000 claims description 15
- 239000008151 electrolyte solution Substances 0.000 claims description 14
- 150000003242 quaternary ammonium salts Chemical class 0.000 claims description 14
- 239000003495 polar organic solvent Substances 0.000 claims description 9
- XNGIFLGASWRNHJ-UHFFFAOYSA-N phthalic acid Chemical compound OC(=O)C1=CC=CC=C1C(O)=O XNGIFLGASWRNHJ-UHFFFAOYSA-N 0.000 claims description 8
- 125000000217 alkyl group Chemical group 0.000 claims description 3
- 125000004432 carbon atom Chemical group C* 0.000 claims description 3
- 125000001453 quaternary ammonium group Chemical group 0.000 claims 1
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- 239000011888 foil Substances 0.000 description 5
- YEJRWHAVMIAJKC-UHFFFAOYSA-N 4-Butyrolactone Chemical compound O=C1CCCO1 YEJRWHAVMIAJKC-UHFFFAOYSA-N 0.000 description 4
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 239000002904 solvent Substances 0.000 description 4
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 3
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 229920006395 saturated elastomer Polymers 0.000 description 3
- ATHHXGZTWNVVOU-UHFFFAOYSA-N N-methylformamide Chemical compound CNC=O ATHHXGZTWNVVOU-UHFFFAOYSA-N 0.000 description 2
- -1 amine salts Chemical class 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- GAEKPEKOJKCEMS-UHFFFAOYSA-N gamma-valerolactone Chemical compound CC1CCC(=O)O1 GAEKPEKOJKCEMS-UHFFFAOYSA-N 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- QEMXHQIAXOOASZ-UHFFFAOYSA-N tetramethylammonium Chemical compound C[N+](C)(C)C QEMXHQIAXOOASZ-UHFFFAOYSA-N 0.000 description 2
- BGBNXIKULUCCOO-BTJKTKAUSA-N (z)-but-2-enedioic acid;n,n-diethylethanamine Chemical compound CCN(CC)CC.OC(=O)\C=C/C(O)=O BGBNXIKULUCCOO-BTJKTKAUSA-N 0.000 description 1
- WSGYTJNNHPZFKR-UHFFFAOYSA-N 3-hydroxypropanenitrile Chemical compound OCCC#N WSGYTJNNHPZFKR-UHFFFAOYSA-N 0.000 description 1
- LCGLNKUTAGEVQW-UHFFFAOYSA-N Dimethyl ether Chemical group COC LCGLNKUTAGEVQW-UHFFFAOYSA-N 0.000 description 1
- OFOBLEOULBTSOW-UHFFFAOYSA-N Malonic acid Chemical compound OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 1
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 1
- 150000001408 amides Chemical class 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 150000003863 ammonium salts Chemical class 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- GSCLMSFRWBPUSK-UHFFFAOYSA-N beta-Butyrolactone Chemical compound CC1CC(=O)O1 GSCLMSFRWBPUSK-UHFFFAOYSA-N 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N dimethyl sulfoxide Natural products CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229940021013 electrolyte solution Drugs 0.000 description 1
- 150000002334 glycols Chemical class 0.000 description 1
- FJJMCDSEMVEAEO-UHFFFAOYSA-L hexanedioate;tetramethylazanium Chemical compound C[N+](C)(C)C.C[N+](C)(C)C.[O-]C(=O)CCCCC([O-])=O FJJMCDSEMVEAEO-UHFFFAOYSA-L 0.000 description 1
- 150000002596 lactones Chemical class 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229910000069 nitrogen hydride Inorganic materials 0.000 description 1
- 150000007524 organic acids 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
- 239000002244 precipitate Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- RUOJZAUFBMNUDX-UHFFFAOYSA-N propylene carbonate Chemical compound CC1COC(=O)O1 RUOJZAUFBMNUDX-UHFFFAOYSA-N 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000012047 saturated solution Substances 0.000 description 1
- UGJCNRLBGKEGEH-UHFFFAOYSA-N sodium-binding benzofuran isophthalate Chemical compound COC1=CC=2C=C(C=3C(=CC(=CC=3)C(O)=O)C(O)=O)OC=2C=C1N(CCOCC1)CCOCCOCCN1C(C(=CC=1C=2)OC)=CC=1OC=2C1=CC=C(C(O)=O)C=C1C(O)=O UGJCNRLBGKEGEH-UHFFFAOYSA-N 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 150000003464 sulfur compounds Chemical class 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 150000005622 tetraalkylammonium hydroxides Chemical class 0.000 description 1
- DZLFLBLQUQXARW-UHFFFAOYSA-N tetrabutylammonium Chemical compound CCCC[N+](CCCC)(CCCC)CCCC DZLFLBLQUQXARW-UHFFFAOYSA-N 0.000 description 1
- CBXCPBUEXACCNR-UHFFFAOYSA-N tetraethylammonium Chemical compound CC[N+](CC)(CC)CC CBXCPBUEXACCNR-UHFFFAOYSA-N 0.000 description 1
- OSBSFAARYOCBHB-UHFFFAOYSA-N tetrapropylammonium Chemical compound CCC[N+](CCC)(CCC)CCC OSBSFAARYOCBHB-UHFFFAOYSA-N 0.000 description 1
- 230000005068 transpiration Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Oscillators With Electromechanical Resonators (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、電解コンデンサ、詳しくは新規な駆動用電解
液を使用した電解コンデンサに関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an electrolytic capacitor, and more particularly to an electrolytic capacitor using a novel driving electrolyte.
（従来の技術）
アルミニウム等の弁作用金属の箔をセパレータとともに
巻回してコンデンサ素子とした電解コンデンサは、一般
にコンデンサ素子に駆動用電解液を含浸し、アルミニウ
ム等の金属ケースや合成樹脂製のケースにコンデンサ素
子を収納し密閉した構造を有する。(Prior art) Electrolytic capacitors are made by winding a foil of a valve metal such as aluminum together with a separator to form a capacitor element.Generally, the capacitor element is impregnated with a driving electrolyte, and then the capacitor element is impregnated with a driving electrolyte and is housed in a metal case such as aluminum or a synthetic resin case. It has a sealed structure in which the capacitor element is housed.
このような電解コンデンサの駆動用電解液としては従来
、エチレングリコール等の極性有機溶媒を主溶媒とし、
これに飽和有機酸のアンモニウム塩のように金属からな
る電極を侵食しない塩を溶解した電解液が一般に使用さ
れている（特公昭５８−１３（）１９号公報）。Conventionally, the driving electrolyte for such electrolytic capacitors uses a polar organic solvent such as ethylene glycol as the main solvent.
An electrolytic solution in which a salt, such as an ammonium salt of a saturated organic acid, which does not corrode metal electrodes, is dissolved is generally used (Japanese Patent Publication No. 58-13 () 19).
（発明が解決しようとする問題点）
しかしながら、前記の電解液においては、電気抵抗値の
指標である損失（ｔａｎ δ）を下げるために１〜３０
重量％の水を含有させることが行われているが、この場
合には陰極箔の侵食や解離したアンモニア（ＮＨ３）の
蒸散のため高温度におけるコンデンサの特性劣化、特に
損失（ｔａｎ δ）の変化が大きいという問題点があっ
た。また、電導度が高く （電気抵抗が低く）、かつ高
温で安定な液として飽和鎖状ジカルボン酸の第４アンモ
ニウム塩を極性有機溶媒に溶解した電解液の使用が特開
昭５９−７８５２２号公報に開示されている。しかしな
がら、実施例によれば、この電解液の電導度はせいぜい
９．４ｍＳ／ｃｌａで、現在要求されている水準（１２
〜２５ｍ５／ｃｍ）から見れば不十分であるという問題
点があった。(Problems to be Solved by the Invention) However, in the above electrolytic solution, in order to reduce loss (tan δ), which is an index of electrical resistance,
Although it has been done to contain % water by weight, in this case, the characteristics of the capacitor deteriorate at high temperatures due to corrosion of the cathode foil and transpiration of dissociated ammonia (NH3), especially changes in loss (tan δ). The problem was that it was large. In addition, JP-A-59-78522 discloses the use of an electrolytic solution in which a quaternary ammonium salt of a saturated chain dicarboxylic acid is dissolved in a polar organic solvent as a liquid that has high conductivity (low electrical resistance) and is stable at high temperatures. has been disclosed. However, according to the example, the conductivity of this electrolyte is at most 9.4 mS/cla, which is the currently required level (12 mS/cla).
25 m5/cm), the problem was that it was insufficient.
本発明は、前記の問題点を解決して、電気抵抗が低（（
電導度が高＜）、かつ高温安定性の優れた電解コンデン
サを提供することを目的とする。The present invention solves the above problems and has low electrical resistance ((
The purpose of the present invention is to provide an electrolytic capacitor with high conductivity and excellent high temperature stability.
（問題点を解決するための手段）
本発明は、前記問題点を解決するため、極性有機溶媒に
Ｏ−フタル酸の第４アンモニウム塩を溶解してなる駆動
用電解液を使用したことを特徴とする電解コンデンサを
提供するものである。(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention is characterized by using a driving electrolytic solution prepared by dissolving a quaternary ammonium salt of O-phthalic acid in a polar organic solvent. The present invention provides an electrolytic capacitor that has the following characteristics.
本発明において用いられる０−フタル酸の第４アンモニ
ウム塩としては、一般式ＲａＮ’で示される第４アンモ
ニウムのアルキル基（Ｒ）の炭素数１〜１０個のもの、
特に１〜４個のものが好適に使用され、たとえば、０−
フタル酸テトラメチルアンモニウム、０−フタル酸テト
ラエチルアンモニウム、０−フタル酸テトラプロピルア
ンモニウム、０−フタル酸テトラブチルアンモニウムな
どがあげられる。As the quaternary ammonium salt of 0-phthalic acid used in the present invention, quaternary ammonium salts having an alkyl group (R) of 1 to 10 carbon atoms represented by the general formula RaN',
In particular, 1 to 4 are preferably used, for example, 0-
Examples include tetramethylammonium phthalate, tetraethylammonium 0-phthalate, tetrapropylammonium 0-phthalate, and tetrabutylammonium 0-phthalate.
本発明において、０−フタル酸の第４アンモニウム塩を
使用するのは、０−フタル酸の他のアミン塩などの場合
には、電解液の電導度が低く製品のｔａｎ δが大きく
なってしまい好ましくないためである。In the present invention, the quaternary ammonium salt of 0-phthalic acid is used because, in the case of other amine salts of 0-phthalic acid, the electrolyte has a low conductivity and the tan δ of the product increases. This is because it is not desirable.
本発明で用いられる０−フタル酸の第４アンモニウム塩
の電解液組成中における含有量（濃度）は、適宜選ぶこ
とができるが、飽和溶液の状態の時に比抵抗が最も小さ
い点を考慮すると１〜５０％が適当であり、なかでも良
好な高温安定性を得るためには５〜４０重量％が好適で
ある。The content (concentration) of the quaternary ammonium salt of 0-phthalic acid used in the present invention in the electrolytic solution composition can be selected as appropriate, but considering that the specific resistance is the lowest in the state of a saturated solution, -50% by weight is suitable, and in order to obtain good high temperature stability, 5-40% by weight is especially suitable.
本発明で用いる極性有機溶媒としては、電解コンデンサ
に通常使用される極性有機溶媒であればいずれも使用可
能である。これらの溶媒の中で、アミド類、ラクトン類
、グリコール類、硫黄化合物類または炭酸塩類が好適に
使用できる。好ましい溶媒の具体的な例としては、ジメ
チルホルムアミド、Ｎ−メチルホルムアミド、γ−ブチ
ロラクトン、β−ブチロラクトン、γ−バレロラクトン
、Ｎ−メチルピロリドン、エチレングリコール、エチレ
ングリコール・モノアルキルエーテル、エチレングリコ
ール・ジアルキルエーテル、ジメチルスルホキシド、炭
酸プロピレン、エチレンシアノヒドリンなどがあげられ
、これらの溶媒は単独で、あるいは適宜混合して使用さ
れる。As the polar organic solvent used in the present invention, any polar organic solvent commonly used in electrolytic capacitors can be used. Among these solvents, amides, lactones, glycols, sulfur compounds, or carbonates can be preferably used. Specific examples of preferred solvents include dimethylformamide, N-methylformamide, γ-butyrolactone, β-butyrolactone, γ-valerolactone, N-methylpyrrolidone, ethylene glycol, ethylene glycol monoalkyl ether, ethylene glycol dialkyl. Examples include ether, dimethyl sulfoxide, propylene carbonate, and ethylene cyanohydrin, and these solvents may be used alone or in appropriate mixtures.
本発明において０−フタル酸の第４アンモニウム塩を含
有する駆動用電解液を得るには、この第４アンモニウム
塩を極性有機溶媒に添加してもよいが、溶媒中で０−フ
タル酸に第４アンモニウム塩を生成可能な物質を反応さ
せることによって、この第４アンモニウム塩を生成させ
てもよい。In the present invention, in order to obtain a driving electrolyte containing a quaternary ammonium salt of 0-phthalic acid, the quaternary ammonium salt may be added to a polar organic solvent. This quaternary ammonium salt may be produced by reacting a substance capable of producing a quaternary ammonium salt.
本発明では電解液中に水を含有させることは必ずしも必
要ではないが、比抵抗を下げるためには水の含有は効果
的である。ただし、ある限度以上に水の含有量を多くす
ると、電解コンデンサのケースの膨れや電極箔の侵食を
増大させる要因になるので高温度で長時間使用する目的
のためには、水の含有量はなるべく少ない方が好ましい
。したがって、コンデンサの使用目的に対応して、水の
含有量は電解液組成中０．１〜２０重景％の範囲が好ま
しく 、Ｏ，Ｓ〜１５重量％がさらに好ましい。In the present invention, it is not necessary to include water in the electrolytic solution, but it is effective to lower the specific resistance. However, if the water content is increased beyond a certain limit, it will cause swelling of the electrolytic capacitor case and corrosion of the electrode foil, so for long-term use at high temperatures, the water content should be It is preferable to have as few as possible. Therefore, depending on the intended use of the capacitor, the content of water in the electrolyte composition is preferably in the range of 0.1 to 20% by weight, and more preferably in the range of O, S to 15% by weight.
本発明の電解コンデンサには、種々の態様のコンデンサ
が包含される。典型的態様としては、紙等の適宜のセパ
レータで分離したアルミニウム箔陽極とアルミニウム箔
陰極とを使用し、これらを円筒状に巻いたものをコンデ
ンサ素子とし、この素子に駆動用電解液を含浸させる。The electrolytic capacitor of the present invention includes various types of capacitors. In a typical embodiment, an aluminum foil anode and an aluminum foil cathode separated by a suitable separator such as paper are used, these are wound into a cylindrical shape to form a capacitor element, and this element is impregnated with a driving electrolyte. .
電解液の含浸量としてはセパレータに対して、好ましく
は５０〜３００重量％とされる。電解液が含浸された素
子は、耐食性を有する金属や合成樹脂等のケースに収納
し、密封した構造にされる。The amount of electrolytic solution impregnated is preferably 50 to 300% by weight based on the separator. The element impregnated with the electrolytic solution is housed in a case made of corrosion-resistant metal, synthetic resin, or the like, and has a sealed structure.
（実施例）
以下、本発明を実施例および比較例に基づいて具体的に
説明する。(Example) Hereinafter, the present invention will be specifically described based on Examples and Comparative Examples.
水酸化テトラアルキルアンモニウム（アルキル基の炭素
数１〜３）の１０％水溶液と０−フタル酸とを等モル数
になるように混合して０−フタル酸を溶解させた後、エ
バポレータにより水を除去してＯ−フタル酸の第４アン
モニウム塩を生成させ、これらを溶質として所定量を極
性有機溶媒に溶解させて実施例１〜１０の電解液とした
。電解液のｐＨは、５〜７になるよう調整した。After mixing a 10% aqueous solution of tetraalkylammonium hydroxide (alkyl group has 1 to 3 carbon atoms) and 0-phthalic acid in an equimolar amount to dissolve 0-phthalic acid, water is removed using an evaporator. This was removed to produce a quaternary ammonium salt of O-phthalic acid, which was used as a solute and a predetermined amount was dissolved in a polar organic solvent to obtain the electrolytes of Examples 1 to 10. The pH of the electrolytic solution was adjusted to 5-7.
これらの電解液を使用してアルミニウムを電極とする電
解コンデンサ（定格１０Ｖ、１０００μＦ）を製作し、
高温負荷試験（定格電圧印加、１２５℃、１０００時間
）を行って、損失（ｔａｎ δ）の変化を測定しその結
果を第１表に示した。また、０−フタル酸の第４アンモ
ニウム塩以外の溶質を使用した場合を比較例１〜４とし
、実施例と同様にして電解コンデンサを製作し、実施例
と同じ条件で高温負荷試験を行ってその結果を第１表に
示した。Using these electrolytes, we manufactured an electrolytic capacitor (rated 10V, 1000μF) with aluminum electrodes,
A high temperature load test (rated voltage applied, 125° C., 1000 hours) was conducted to measure the change in loss (tan δ), and the results are shown in Table 1. In addition, Comparative Examples 1 to 4 are cases in which a solute other than the quaternary ammonium salt of 0-phthalic acid is used, and electrolytic capacitors were manufactured in the same manner as in the example, and a high temperature load test was conducted under the same conditions as in the example. The results are shown in Table 1.
次に、極性有機溶媒としてＴ−ブチロラクトンを選び、
溶質として０−フタル酸テトラメチルアンモニウム（実
験例１）、Ｏ−フタル酸トリエチルアミン（実験例２）
、アジピン酸テトラメチルアンモニウム（実験例３）お
よびマレイン酸トリエチルアミン（実験例４）を種々の
濃度に溶解し、密閉容器中で１２５℃において１０００
時間保存後、４０℃における比抵抗と８５℃における火
花電圧を測定した。第１図にその結果をそれぞれグラフ
１〜４として示す、第１図においては実験例１〜４はす
べて溶質の濃度が高い程、比抵抗も火花電圧も小さくな
る傾向を示した。電解液としては比抵抗が小さく、かつ
火花電圧が大きい程、好ましく、図中左上部にプロット
されるものが好ましい。したがって、実験例１ （実施
例１に対応）の電解液が実験例２〜４（比較例１〜３に
対応）の電解液よりも高温特性が優れていることが分る
。Next, choose T-butyrolactone as the polar organic solvent,
Tetramethylammonium O-phthalate (Experimental Example 1), triethylamine O-phthalate (Experimental Example 2) as solutes
, tetramethylammonium adipate (Experimental Example 3) and triethylamine maleate (Experimental Example 4) were dissolved at various concentrations and heated to 1000 °C at 125°C in a closed container.
After storage for a period of time, specific resistance at 40°C and spark voltage at 85°C were measured. The results are shown in graphs 1 to 4 in FIG. 1. In FIG. 1, experimental examples 1 to 4 all showed a tendency that the higher the solute concentration, the smaller the specific resistance and spark voltage. The smaller the specific resistance and the larger the spark voltage, the more preferable the electrolytic solution is, and the one plotted at the upper left in the figure is preferable. Therefore, it can be seen that the electrolytic solution of Experimental Example 1 (corresponding to Example 1) has better high-temperature characteristics than the electrolytic solutions of Experimental Examples 2 to 4 (corresponding to Comparative Examples 1 to 3).
第２図にはγ−ブチロラクトンにＯ−フタル酸テトラメ
チルアンモニウムを種々の濃度で溶解させた電解液の４
０℃における比抵抗の値を示す。この図から明らかなよ
うに溶質の濃度の増加とともに、電解液の比抵抗は小さ
くなるが、濃度が４０〜５０％になると飽和状態になっ
て沈澱が生成するようになり、これ以上比抵抗を下げる
ことはできな第１表
（発明の効果）
以上説明したように本発明によれば、高温条件下での損
失（ｔａｎ δ）の変化が小さい高温安定性の優れた電
解コンデンサが得られる。Figure 2 shows four electrolyte solutions in which tetramethylammonium O-phthalate is dissolved in γ-butyrolactone at various concentrations.
The value of specific resistance at 0°C is shown. As is clear from this figure, as the concentration of solute increases, the specific resistance of the electrolyte decreases, but when the concentration reaches 40 to 50%, it reaches a saturated state and precipitates begin to form, and the specific resistance decreases further. Table 1 (Effects of the Invention) As explained above, according to the present invention, an electrolytic capacitor with excellent high-temperature stability and small change in loss (tan δ) under high-temperature conditions can be obtained.
【図面の簡単な説明】
第１図は、実験例１〜４における電解液の比抵抗と火花
電圧との関係を示すグラフであり、第２図は本発明で使
用する０−フタル酸の第４アンモニウム塩の濃度（重量
％）と比抵抗との関係を示すグラフである。[Brief Description of the Drawings] Fig. 1 is a graph showing the relationship between the specific resistance of the electrolyte and the spark voltage in Experimental Examples 1 to 4, and Fig. 2 is a graph showing the relationship between the specific resistance of the electrolyte and the spark voltage in Experimental Examples 1 to 4. It is a graph showing the relationship between the concentration (weight %) of tetraammonium salt and specific resistance.
Claims (3)
塩を溶解してなる駆動用電解液を使用したことを特徴と
する電解コンデンサ。(1) An electrolytic capacitor characterized in that it uses a driving electrolyte prepared by dissolving a quaternary ammonium salt of o-phthalic acid in a polar organic solvent.
塩の含有量が１〜５０重量％である特許請求の範囲第１
項記載の電解コンデンサ。(2) The content of the quaternary ammonium salt of o-phthalic acid in the electrolytic solution is 1 to 50% by weight.
Electrolytic capacitors listed in section.
のアルキル基（Ｒ）の炭素数が１〜１０個である特許請
求の範囲第１項または第２項記載の電解コンデンサ。(3) The electrolytic capacitor according to claim 1 or 2, wherein the alkyl group (R) of the quaternary ammonium represented by the general formula R_4N^+ has 1 to 10 carbon atoms.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21261186A JPS6369213A (en) | 1986-09-11 | 1986-09-11 | Electrolytic capacitor |
| US07/049,297 US4734821A (en) | 1986-05-13 | 1987-05-13 | Electrolytic capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21261186A JPS6369213A (en) | 1986-09-11 | 1986-09-11 | Electrolytic capacitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6369213A true JPS6369213A (en) | 1988-03-29 |
Family
ID=16625547
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21261186A Pending JPS6369213A (en) | 1986-05-13 | 1986-09-11 | Electrolytic capacitor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6369213A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63222414A (en) * | 1987-03-11 | 1988-09-16 | ニチコン株式会社 | Driving electrolyte of aluminum electrolytic capacitor |
-
1986
- 1986-09-11 JP JP21261186A patent/JPS6369213A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63222414A (en) * | 1987-03-11 | 1988-09-16 | ニチコン株式会社 | Driving electrolyte of aluminum electrolytic capacitor |
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