JPH10106893A - Electrolyte for electrolytic capacitor - Google Patents
Electrolyte for electrolytic capacitorInfo
- Publication number
- JPH10106893A JPH10106893A JP27738596A JP27738596A JPH10106893A JP H10106893 A JPH10106893 A JP H10106893A JP 27738596 A JP27738596 A JP 27738596A JP 27738596 A JP27738596 A JP 27738596A JP H10106893 A JPH10106893 A JP H10106893A
- Authority
- JP
- Japan
- Prior art keywords
- acid
- electrolytic capacitor
- solvent
- multitall
- organic
- 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 30
- 239000003792 electrolyte Substances 0.000 title abstract description 9
- 239000002904 solvent Substances 0.000 claims abstract description 8
- 150000005846 sugar alcohols Polymers 0.000 claims abstract description 7
- 239000008151 electrolyte solution Substances 0.000 claims description 20
- 239000000845 maltitol Substances 0.000 claims description 6
- 235000010449 maltitol Nutrition 0.000 claims description 6
- VQHSOMBJVWLPSR-WUJBLJFYSA-N maltitol Chemical compound OC[C@H](O)[C@@H](O)[C@@H]([C@H](O)CO)O[C@H]1O[C@H](CO)[C@@H](O)[C@H](O)[C@H]1O VQHSOMBJVWLPSR-WUJBLJFYSA-N 0.000 claims description 6
- 229940035436 maltitol Drugs 0.000 claims description 6
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 7
- 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
- 150000007524 organic acids Chemical class 0.000 abstract description 6
- 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
- -1 organic acid salt Chemical class 0.000 abstract description 4
- 235000005985 organic acids Nutrition 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
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 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
- 239000004327 boric acid Substances 0.000 abstract description 2
- 235000011187 glycerol Nutrition 0.000 abstract description 2
- 150000003839 salts Chemical class 0.000 abstract description 2
- OFOBLEOULBTSOW-UHFFFAOYSA-N Malonic acid Chemical compound OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 abstract 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
- 239000010407 anodic oxide Substances 0.000 description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- 239000000654 additive Substances 0.000 description 3
- 239000011888 foil 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
- 229930195725 Mannitol Natural products 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 239000000594 mannitol Substances 0.000 description 2
- 235000010355 mannitol Nutrition 0.000 description 2
- WWZKQHOCKIZLMA-UHFFFAOYSA-N octanoic acid Chemical compound CCCCCCCC(O)=O WWZKQHOCKIZLMA-UHFFFAOYSA-N 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
- FLDCSPABIQBYKP-UHFFFAOYSA-N 5-chloro-1,2-dimethylbenzimidazole Chemical compound ClC1=CC=C2N(C)C(C)=NC2=C1 FLDCSPABIQBYKP-UHFFFAOYSA-N 0.000 description 1
- 239000001741 Ammonium adipate Substances 0.000 description 1
- BTBUEUYNUDRHOZ-UHFFFAOYSA-N Borate Chemical compound [O-]B([O-])[O-] BTBUEUYNUDRHOZ-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
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 235000019293 ammonium adipate Nutrition 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229960002446 octanoic acid Drugs 0.000 description 1
- ACVYVLVWPXVTIT-UHFFFAOYSA-N phosphinic acid Chemical compound O[PH2]=O ACVYVLVWPXVTIT-UHFFFAOYSA-N 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Electric Double-Layer Capacitors Or The Like (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
電解液に関し、特に電解コンデンサの寿命を改善できる
電解コンデンサ用電解液に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrolytic solution for an electrolytic capacitor, and more particularly to an electrolytic solution for an electrolytic capacitor which can improve the life of the electrolytic capacitor.
【０００２】[0002]
【従来の技術】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密封した構造になってい
る。ところで、電解コンデンサの製造工程中や使用中
に、陽極箔の表面に形成した陽極酸化皮膜が損傷する。
電解液はこの損傷した陽極酸化皮膜を修復する効果を有
している。そしてこの陽極酸化皮膜を修復する効果を高
め、耐圧を向上するために、例えば、マンニットやソル
ビット等の糖アルコールを電解液中に添加している。2. Description of the Related Art In general, an electrolytic capacitor such as an aluminum electrolytic capacitor is formed by winding an anode foil and a cathode foil via a separator to form a capacitor element, and impregnating the capacitor element with an electrolytic solution and housing the capacitor element in a case. It has a sealed structure. By the way, during the manufacturing process or use of the electrolytic capacitor, the anodic oxide film formed on the surface of the anode foil is damaged.
The electrolyte has an effect of repairing the damaged anodic oxide film. In order to enhance the effect of repairing the anodic oxide film and improve the pressure resistance, for example, a sugar alcohol such as mannitol or sorbite is added to the electrolytic solution.
【０００３】[0003]
【発明が解決しようとする課題】しかし、マンニット等
の糖アルコールを添加した電解液は、陽極酸化皮膜を修
復する効果を長期間は保持できない欠点がある。そのた
め、この電解液を含浸した電解コンデンサは、tanδや
漏れ電流が増大し易く、寿命が比較的短い。However, an electrolytic solution to which a sugar alcohol such as mannitol is added has a drawback that the effect of repairing the anodic oxide film cannot be maintained for a long time. Therefore, the electrolytic capacitor impregnated with this electrolytic solution is likely to increase tan δ and leakage current, and has a relatively short life.
【０００４】本発明は、以上の欠点を改良し、陽極酸化
皮膜を修復する効果を長期間保持でき、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 disadvantages, maintain the effect of repairing the anodic oxide film for a long period of time, and prolong 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、多価アルコール類を主な溶媒とする電
解コンデンサ用電解液において、マルチトールを含有す
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 containing a polyhydric alcohol as a main solvent, wherein the electrolytic solution contains maltitol. An object of the present invention is to provide an electrolytic solution for a capacitor.
【０００６】マルチトールを添加することによって、陽
極酸化皮膜を修復する効果を長期間保持でき、電解コン
デンサの寿命を長くできる。[0006] By adding maltitol, the effect of repairing the anodic oxide film can be maintained for a long time, and the life of the electrolytic capacitor can be prolonged.
【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、有機酸や有
機酸塩、ホウ酸、ホウ酸塩等の少なくとも一種類を用い
る。有機酸は、アジピン酸や安息香酸、アゼライン酸、
セバシン酸、カプリル酸、１，６−デカンジカルボン
酸、５，６−デカンジカルボン酸等を用いる。また、有
機酸塩は、これらの有機酸の塩を用いる。そして上記の
溶媒及び溶質からなる溶液中にマルチトールを添加す
る。このマルチトールの添加量は、０．５〜３０．０wt
％の範囲が好ましい。すなわち、添加量が０．５wt％よ
りも少ないと陽極酸化皮膜を修復する効果が低い。ま
た、添加量が３０．０wt％よりも多いと、電解コンデン
サのtanδの増加率が大きくなり、かつ漏れ電流が増大
し易くなる。なお、他にリン酸や次亜リン酸等を添加剤
として用いる。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, and 1,4-butanediol are used as a main component. As the solute, at least one kind of organic acid, organic acid salt, boric acid, borate and the like is used. Organic acids include adipic acid, benzoic acid, azelaic acid,
Sebacic acid, caprylic acid, 1,6-decanedicarboxylic acid, 5,6-decanedicarboxylic acid and the like are used. As the organic acid salt, salts of these organic acids are used. Then, maltitol is added to a solution comprising the above solvent and solute. The amount of maltitol added is 0.5-30.0wt
% Is preferred. That is, if the addition amount is less than 0.5 wt%, the effect of repairing the anodic oxide film is low. On the other hand, if the addition amount is more than 30.0 wt%, the rate of increase in tan δ of the electrolytic capacitor increases, and the leakage current tends to increase. In addition, phosphoric acid, hypophosphorous acid, and the like are used as additives.
【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の溶
媒が４７．９５〜９１．４５wt％、アジピン酸アンモニ
ウム等の溶質が８．００〜２２．００wt％そして添加剤
が０．５５〜３０．０５wt％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 47.95 to 91.45 wt% of a solvent such as ethylene glycol, 8.00 to 22.00 wt% of a solute such as ammonium adipate, and 0.55 wt% of an additive. ３30.05 wt%.
【０００９】[0009]
【表１】 [Table 1]
【００１０】そして、表１に示した組成の実施例及び従
来例の電解液を含浸したアルミ電解コンデンサについ
て、高温ＤＣ負荷試験を行ない、静電容量変化率、tan
δ及び漏れ電流を測定した。この場合、アルミ電解コン
デンサの定格は、実施例１、実施例９及び従来例２の電
解液を含浸したものが２５０ＷＶ、２７０μＦ、そして
その他の電解液を含浸したものが４００ＷＶ，２７０μ
Ｆとする。また、試験温度は、実施例６〜実施例８及び
従来例１の電解液を含浸したアルミ電解コンデンサが９
０℃、そしてその他の電解液を含浸したものが１１０℃
とする。印加電圧の大きさは各定格電圧とする。さら
に、漏れ電流は、試料を温度２０℃の雰囲気中にコンデ
ンサ素子の中心部が２０℃の温度になるまで放置した
後、定格電圧を印加し、５分後の値を測定した。試料数
は各々３０個とする。測定結果を表２に示す。Then, a high-temperature DC load test was performed on the aluminum electrolytic capacitors impregnated with the electrolytes of the examples shown in Table 1 and the conventional electrolytic solution, and the capacitance change rate, tan
δ and leakage current were measured. In this case, the rating of the aluminum electrolytic capacitor was 250 WV, 270 μF for those impregnated with the electrolytes of Examples 1, 9 and Conventional Example 2, and 400 WV, 270 μF for those impregnated with other electrolytes.
F. The test temperature was 9% for the aluminum electrolytic capacitors impregnated with the electrolytic solutions of Examples 6 to 8 and Conventional Example 1.
0 ° C, and 110 ° C impregnated with other electrolyte
And The magnitude of the applied voltage shall be each rated voltage. Further, the leakage current was measured after leaving the sample in an atmosphere at a temperature of 20 ° C. until the center of the capacitor element reached a temperature of 20 ° C., applying a rated voltage, and measuring the value after 5 minutes. The number of samples is 30 each. Table 2 shows the measurement results.
【００１１】[0011]
【表２】 [Table 2]
【００１２】表２から明らかな通り、定格電圧が２５０
ＷＶの電解コンデンサについては、２０００時間放置後
において、実施例１及び実施例９の電解液を含浸したＮ
Ｏ１及びＮＯ９の場合、静電容量変化率が−０．０２〜
−０．０３％、tanδが０．０４４〜０．０５５、漏れ
電流が８〜１０μＡとなる。これに対して、従来例２の
電解液を含浸したＮＯ１２の場合、静電容量変化率が−
１．３５％、tanδが０．０６８、漏れ電流が１５１μ
Ａとなる。従って、前者は、後者に比較して、静電容量
変化率が約１．４８〜２．２２％に、tanδが約６４．
７〜８０．９％に、漏れ電流が約５．３０〜６．６２％
の大きさになり、劣化が抑制されている。As is clear from Table 2, the rated voltage is 250
Regarding the WV electrolytic capacitor, after being left for 2,000 hours, the NV impregnated with the electrolytic solution of Examples 1 and 9 was used.
In the case of O1 and NO9, the capacitance change rate is -0.02 to
−0.03%, tan δ is 0.044 to 0.055, and leakage current is 8 to 10 μA. On the other hand, in the case of NO12 impregnated with the electrolyte of Conventional Example 2, the capacitance change rate was −
1.35%, tan δ 0.068, leakage current 151μ
A. Therefore, the former has a capacitance change rate of about 1.48 to 2.22% and a tan δ of about 64.
7-80.9%, leakage current about 5.30-6.62%
And the degradation is suppressed.
【００１３】また、定格電圧が４００ＷＶの電解コンデ
ンサについては、試験温度が１１０℃のとき、２０００
時間放置後において、実施例２〜実施例５、実施例１０
の電解液を含浸したＮＯ２〜ＮＯ５，ＮＯ１０の場合、
静電容量変化率が−０．０１〜−０．０５％、tanδが
０．０４６〜０．０６８、漏れ電流が８〜１０μＡとな
る。そして従来例３〜従来例５の電解液を含浸したＮＯ
１３〜ＮＯ１５の場合、静電容量変化率が−１．２２〜
−１．３３％、tanδが０．０７８〜０．０９４、漏れ
電流が１０２〜１５５μＡとなる。それ故、前者は、後
者に比較して、静電容量変化率が約０．７５〜４．１０
％に、tanδが約４８．９〜８７．２％に、漏れ電流が
約５．１６〜９．８０％の大きさに低下している。そし
て試験温度が９０℃のとき、２０００時間放置後におい
て、実施例６〜実施例８の電解液を含浸したＮＯ６〜Ｎ
Ｏ８は、静電容量変化率が−０．１１〜−０．１３、ta
nδが０．０７８〜０．０７９、漏れ電流が８〜９μＡ
となる。そして従来例１を含浸したＮＯ１１は、静電容
量変化率が−０．０２％、tanδが０．０９８、漏れ電
流が１５８μＡとなる。従って、前者は、後者に比較し
て、静電容量変化率は大きくなっているが、tanδが約
７９．６〜８０．６％にそして漏れ電流が約５．０６〜
５．７０％に各々低下している。For an electrolytic capacitor having a rated voltage of 400 WV, when the test temperature is 110.degree.
After leaving for a time, Examples 2 to 5 and Example 10
In the case of NO2 to NO5 and NO10 impregnated with the electrolytic solution of
The capacitance change rate is -0.01 to -0.05%, tan δ is 0.046 to 0.068, and the leakage current is 8 to 10 µA. NO 3 impregnated with the electrolytic solution of Conventional Example 3 to Conventional Example 5
13 to NO15, the capacitance change rate is -1.22
−1.33%, tan δ is 0.078 to 0.094, and leakage current is 102 to 155 μA. Therefore, the former has a capacitance change rate of about 0.75 to 4.10 compared to the latter.
%, Tan δ to about 48.9 to 87.2%, and leakage current to about 5.16 to 9.80%. Then, when the test temperature was 90 ° C., after leaving for 2,000 hours, the NO 6 to N 6 impregnated with the electrolytic solutions of Examples 6 to 8 were used.
O8 has a capacitance change rate of -0.11 to -0.13, ta
nδ is 0.078 to 0.079 and leakage current is 8 to 9 μA
Becomes Then, NO11 impregnated with Conventional Example 1 has a capacitance change rate of −0.02%, a tan δ of 0.098, and a leakage current of 158 μA. Therefore, the former has a larger capacitance change rate than the latter, but has a tan δ of about 79.6 to 80.6% and a leakage current of about 5.06 to
It has fallen to 5.70% each.
【００１４】さらに、４０００時間放置後において、実
施例１〜実施例１０の電解液を含浸したＮＯ１〜ＮＯ１
０については、コンデンサとしての正常な機能を有して
いる。これに対し、従来例１〜従来例５の電解液を含浸
したＮＯ１１〜ＮＯ１５は、全試料とも、ケースを密封
するのに用いた蓋に設けた防爆弁が作動し、コンデンサ
としての正常な機能を失った。Further, after standing for 4000 hours, NO1 to NO1 impregnated with the electrolytic solutions of Examples 1 to 10 were used.
0 has a normal function as a capacitor. On the other hand, for all samples NO11 to NO15 impregnated with the electrolytes of Conventional Examples 1 to 5, the explosion-proof valve provided on the lid used to seal the case was activated, and the normal function as a capacitor was obtained. Lost.
【００１５】[0015]
【発明の効果】以上の通り、本発明によれば、マルチト
ールを添加剤として用いているため、電解コンデンサの
tanδ特性や漏れ電流特性を改良でき、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 maltitol is used as an additive, an electrolytic capacitor
It is possible to obtain an electrolytic solution for an electrolytic capacitor that can improve the tan δ characteristic and the leakage current characteristic and can prolong the life.
Claims (1)
コンデンサ用電解液において、マルチトールを含有する
ことを特徴とする電解コンデンサ用電解液。1. An electrolytic solution for an electrolytic capacitor comprising a polyhydric alcohol as a main solvent and comprising maltitol.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27738596A JPH10106893A (en) | 1996-09-27 | 1996-09-27 | Electrolyte for electrolytic capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27738596A JPH10106893A (en) | 1996-09-27 | 1996-09-27 | Electrolyte for electrolytic capacitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10106893A true JPH10106893A (en) | 1998-04-24 |
Family
ID=17582800
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27738596A Pending JPH10106893A (en) | 1996-09-27 | 1996-09-27 | Electrolyte for electrolytic capacitor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10106893A (en) |
-
1996
- 1996-09-27 JP JP27738596A patent/JPH10106893A/en active Pending
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