JPH0281417A - Electrolyte for driving electrolytic capacitor - Google Patents
Electrolyte for driving electrolytic capacitorInfo
- Publication number
- JPH0281417A JPH0281417A JP23283288A JP23283288A JPH0281417A JP H0281417 A JPH0281417 A JP H0281417A JP 23283288 A JP23283288 A JP 23283288A JP 23283288 A JP23283288 A JP 23283288A JP H0281417 A JPH0281417 A JP H0281417A
- Authority
- JP
- Japan
- Prior art keywords
- acid
- electrolyte
- humic acid
- electrolytic capacitor
- water
- 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 10
- 239000003792 electrolyte Substances 0.000 title abstract description 11
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims abstract description 21
- QJZYHAIUNVAGQP-UHFFFAOYSA-N 3-nitrobicyclo[2.2.1]hept-5-ene-2,3-dicarboxylic acid Chemical compound C1C2C=CC1C(C(=O)O)C2(C(O)=O)[N+]([O-])=O QJZYHAIUNVAGQP-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000004021 humic acid Substances 0.000 claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 12
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000004327 boric acid Substances 0.000 claims abstract description 6
- 150000007524 organic acids Chemical class 0.000 claims abstract description 6
- 150000003839 salts Chemical class 0.000 claims abstract description 6
- 239000008151 electrolyte solution Substances 0.000 claims description 13
- 239000012046 mixed solvent Substances 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 9
- 229910052782 aluminium Inorganic materials 0.000 abstract description 9
- 239000000203 mixture Substances 0.000 abstract description 5
- 239000002904 solvent Substances 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 4
- 238000006703 hydration reaction Methods 0.000 abstract description 4
- 230000036571 hydration Effects 0.000 abstract description 3
- 239000002253 acid Substances 0.000 abstract 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 2
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical class [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 description 1
- 235000005985 organic acids Nutrition 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- -1 phosphorus compound Chemical class 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- ISIJQEHRDSCQIU-UHFFFAOYSA-N tert-butyl 2,7-diazaspiro[4.5]decane-7-carboxylate Chemical compound C1N(C(=O)OC(C)(C)C)CCCC11CNCC1 ISIJQEHRDSCQIU-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Electric Double-Layer Capacitors Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、フミン酸の防食効果により寿命特性を向上せ
しめ、かつ低比抵抗の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。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention provides an electrolyte for driving an electrolytic capacitor (
(hereinafter referred to as electrolyte).
従来の技術
従来よりアルミニウム電解コンデンサの電解液としてエ
チレングリコールを主溶媒とし、エチレングリコールだ
けでは、硼酸および有機酸あるいはその塩の溶解度が小
さく、電解液の比抵抗が高くなるため、純水を副溶媒と
して１０〜２０重量％添加し、さらに水によるアルミニ
ウム電極の水和を防ぐため、亜りん酸、りん酸などのり
ん化合物が添加されていた。Conventional technology Traditionally, ethylene glycol has been used as the main solvent for the electrolyte of aluminum electrolytic capacitors, and since ethylene glycol alone has low solubility for boric acid and organic acids or their salts, and increases the specific resistance of the electrolyte, pure water has been used as a secondary solvent. In addition to adding 10 to 20% by weight as a solvent, phosphorous compounds such as phosphorous acid and phosphoric acid were added to prevent hydration of the aluminum electrode by water.
発明が解決しようとする問題点
しかし、上記りん化合物では、１０〜２０重量％の純水
の水和を防ぐことはできるが、さらに低比抵抗の電解液
とするために、これ以上純水を添加すると、高温負荷、
高温無負荷試験において弁膨張あるいは弁作動などの外
観異常を生じる。Problems to be Solved by the Invention However, although the above-mentioned phosphorus compound can prevent hydration of 10 to 20% by weight of pure water, in order to obtain an electrolytic solution with an even lower specific resistance, it is necessary to add more pure water. When added, high temperature load,
Appearance abnormalities such as valve expansion or valve operation occur during high temperature no-load tests.
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もので、従来の電解
液から得られる優れた特性を損なうことなく、低比抵抗
でしかも高温負荷、高温無負荷試験において安定な電解
液を提供するものである。Means for Solving the Problems The present invention solves the above-mentioned problems, and is capable of achieving low resistivity and high temperature load and high temperature no-load tests without sacrificing the excellent properties obtained from conventional electrolytes. It provides a stable electrolyte.
すなわち、水−エチレングリコールの混合溶媒に、硼酸
および有機酸あるいはその塩を溶解してなる電解液にフ
ミン酸を添加して溶解したことを特徴とする電解コンデ
ンサの電解液である。That is, the electrolytic solution for an electrolytic capacitor is characterized in that humic acid is added and dissolved in an electrolytic solution prepared by dissolving boric acid and an organic acid or a salt thereof in a mixed solvent of water and ethylene glycol.
また、上記フミン酸の添加量は、０．０５〜１．００重
量％の範囲内が望ましい。Further, the amount of humic acid added is preferably within the range of 0.05 to 1.00% by weight.
作用
本発明の電解液は、電解液中にフミン酸を添加すること
によって、フミン酸がアルミニウム電極表面に吸着し、
水分子とアルミニウムによる水和反応を抑制し、アルミ
ニウム電極を保護する。Function: By adding humic acid to the electrolytic solution of the present invention, the humic acid is adsorbed on the surface of the aluminum electrode.
Suppresses the hydration reaction between water molecules and aluminum and protects the aluminum electrode.
実施例
第１表は、電解液の組成と比抵抗を示し、第２表にその
各組成の電解液で、定格１０ＷＶ １００μＦのアルミ
ニウム電解コンデンサを試作し、１０５°Ｃ１０００時
間の高温負荷試験を行った結果を示す。Example Table 1 shows the composition and specific resistance of the electrolytic solution, and Table 2 shows the prototype aluminum electrolytic capacitors with a rating of 10 WV and 100 μF using the electrolytic solution of each composition, and a high temperature load test was conducted at 105°C for 1000 hours. The results are shown below.
但し、表中の値は、第１表中組成においては重量ｇ比を
示しく ）内は重量％比を示す。However, the values in the table indicate the weight/g ratio in the compositions in Table 1, and the values in parentheses () indicate the weight % ratio.
比抵抗は３０℃での測定値、静電容量は２５°Ｃ１２０
Ｈｚでの測定値、Ｄ−Ｆは２５℃１２０Ｈｚで測定した
ｔａｎδ値の百分率、漏れ電流は定格電圧印加後１分後
の測定値であり、試料数ｎ＝１０個の値の平均値である
。Specific resistance is measured at 30℃, capacitance is measured at 25℃120
The measured value in Hz, D-F is the percentage of the tan δ value measured at 25°C and 120 Hz, and the leakage current is the measured value 1 minute after applying the rated voltage, and is the average value of the values of samples n = 10. .
第
■
表
本発明に係るフミン酸を添加した電解液を用いたものは
、上述の電解液中の純水の量が２０重量％以上であって
も、高温負荷試験において外観異常を起こさず、しかも
低比抵抗であることから著しい改良効果が得られている
。Table ■ The electrolyte solution containing humic acid according to the present invention does not cause any appearance abnormality in the high-temperature load test even if the amount of pure water in the electrolyte solution is 20% by weight or more. Moreover, due to its low specific resistance, a remarkable improvement effect is obtained.
また、フミン酸の添加量が１重量％を超えると、飽和濃
度となり析出して電解液とならず、０．０５重量％未満
ではその効果がない。Further, if the amount of humic acid added exceeds 1% by weight, the concentration becomes saturated and it precipitates and does not become an electrolytic solution, and if it is less than 0.05% by weight, there is no effect.
発明の効果
以上のように、本発明の水−エチレングリコールの混合
溶媒に、硼酸および有機酸あるいはその塩を溶解してな
る電解液にフミン酸を添加して溶解したことを特徴とす
る電解液を使用した電解コンデンサは低比抵抗で、信耗
性が高くコスト面でも有利となり、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 described above, the electrolytic solution of the present invention is characterized in that humic acid is added and dissolved in the electrolytic solution obtained by dissolving boric acid and an organic acid or a salt thereof in a mixed solvent of water and ethylene glycol. Electrolytic capacitors using this type of capacitor have low resistivity, high reliability, and are advantageous in terms of cost, and are of great industrial and practical value.
Claims (1)
酸あるいはその塩を溶解してなる電解液にフミン酸を添
加して溶解したことを特徴とする電解コンデンサの駆動
用電解液。An electrolytic solution for driving an electrolytic capacitor, characterized in that humic acid is added and dissolved in an electrolytic solution obtained by dissolving boric acid and an organic acid or a salt thereof in a mixed solvent of water and ethylene glycol.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23283288A JPH0281417A (en) | 1988-09-16 | 1988-09-16 | Electrolyte for driving electrolytic capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23283288A JPH0281417A (en) | 1988-09-16 | 1988-09-16 | Electrolyte for driving electrolytic capacitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0281417A true JPH0281417A (en) | 1990-03-22 |
Family
ID=16945488
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23283288A Pending JPH0281417A (en) | 1988-09-16 | 1988-09-16 | Electrolyte for driving electrolytic capacitor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0281417A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000216062A (en) * | 1999-01-20 | 2000-08-04 | Sanyo Electric Co Ltd | Electrolytic capacitor |
-
1988
- 1988-09-16 JP JP23283288A patent/JPH0281417A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000216062A (en) * | 1999-01-20 | 2000-08-04 | Sanyo Electric Co Ltd | Electrolytic capacitor |
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