JPH0318008A - Electrolyte for driving electrolytic-capacitor - Google Patents
Electrolyte for driving electrolytic-capacitorInfo
- Publication number
- JPH0318008A JPH0318008A JP15272489A JP15272489A JPH0318008A JP H0318008 A JPH0318008 A JP H0318008A JP 15272489 A JP15272489 A JP 15272489A JP 15272489 A JP15272489 A JP 15272489A JP H0318008 A JPH0318008 A JP H0318008A
- Authority
- JP
- Japan
- Prior art keywords
- trialkylester
- phosphates
- electrolyte
- electrolytic capacitor
- added
- 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 17
- 239000003792 electrolyte Substances 0.000 title abstract description 10
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims abstract description 15
- KWIPUXXIFQQMKN-UHFFFAOYSA-N 2-azaniumyl-3-(4-cyanophenyl)propanoate Chemical compound OC(=O)C(N)CC1=CC=C(C#N)C=C1 KWIPUXXIFQQMKN-UHFFFAOYSA-N 0.000 claims abstract description 5
- 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 5
- 229940090948 ammonium benzoate Drugs 0.000 claims abstract description 5
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000004327 boric acid Substances 0.000 claims abstract description 5
- 235000010355 mannitol Nutrition 0.000 claims abstract description 5
- 239000002904 solvent Substances 0.000 claims abstract description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 12
- 239000008151 electrolyte solution Substances 0.000 claims description 7
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 6
- 150000002148 esters Chemical class 0.000 claims description 6
- 229930195725 Mannitol Natural products 0.000 claims description 4
- 239000000594 mannitol Substances 0.000 claims description 4
- 239000000243 solution Substances 0.000 claims 1
- 239000011888 foil Substances 0.000 abstract description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052782 aluminium Inorganic materials 0.000 abstract description 4
- YEVQZPWSVWZAOB-UHFFFAOYSA-N 2-(bromomethyl)-1-iodo-4-(trifluoromethyl)benzene Chemical compound FC(F)(F)C1=CC=C(I)C(CBr)=C1 YEVQZPWSVWZAOB-UHFFFAOYSA-N 0.000 abstract description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 abstract description 3
- SFENPMLASUEABX-UHFFFAOYSA-N trihexyl phosphate Chemical compound CCCCCCOP(=O)(OCCCCCC)OCCCCCC SFENPMLASUEABX-UHFFFAOYSA-N 0.000 abstract description 3
- 230000007797 corrosion Effects 0.000 abstract description 2
- 238000005260 corrosion Methods 0.000 abstract description 2
- 229910019142 PO4 Inorganic materials 0.000 abstract 5
- 235000021317 phosphate Nutrition 0.000 abstract 5
- 150000003013 phosphoric acid derivatives Chemical class 0.000 abstract 5
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 239000000203 mixture Substances 0.000 description 2
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- STCOOQWBFONSKY-UHFFFAOYSA-N tributyl phosphate Chemical compound CCCCOP(=O)(OCCCC)OCCCC STCOOQWBFONSKY-UHFFFAOYSA-N 0.000 description 1
- DQWPFSLDHJDLRL-UHFFFAOYSA-N triethyl phosphate Chemical compound CCOP(=O)(OCC)OCC DQWPFSLDHJDLRL-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Secondary Cells (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、電解コンデンサ駆動用電解液に関するもので
ある．
［従来の技術］
中圧用電解コンデンサの駆動用電解液としてエチレング
リコールを主体とする溶媒に安息香酸アンモニウムを溶
解したものが良く使用されており、長寿命化をはかるた
めにさらに硼酸およびマンニットを添加した電解液（特
公昭６０−３８８６０号公報）も公知である．
［発明が解決しようとする課題］
エチレングリコール、安息香酸アンモニウム，硼酸およ
びマンニットからなる電解液は耐熱性は良好であるが、
電解コンデンサの低損失化をはかるために必要な電解液
の電導度が得にくいという問題点がある．すなわち、こ
の電解液において、溶質濃度を上げると、アルミニウム
からなる電極箔との反応性が高くなり、電極箔が腐食し
、水素ガスを発生するために電解コンデンサの長寿命化
をはかることが困難なちのであった．
［課題を解決するための手段］
しかるに、本発明は電解コンデンサのさらなる長寿命化
をはかるために，エチレングリコール、安息香酸アンモ
ニウム，硼酸およびマンニットからなる電解液にリン酸
トリアルキルエステル類を添加したものである．
電解液中にリン酸トリアルキルエステル類を添加すると
、リン酸トリアルキルエステル類はアルミニウム電極箔
の表面に吸着し、特に陰極箔の自然腐食を抑制する．こ
れにより、電解コンデンサの内部での水素ガスの発生が
抑制されて電解コンデンサの長寿命化をはかることがで
きる．リン酸トリアルキルエステル類としてはリン酸ト
リエチル、リン酸トリブチル、リン酸トリヘキシルおよ
びリン酸トリオクチルであり、なかでも分子量の大きい
トリヘキシルおよびトリオクチルが好ましい．リン酸ト
リアルキルエステル類の添加量は０．５〜５ｗｔ％が好
まし（．０．５ｗｔ％未満であると効果が少なく、また
５ｗｔ％を越えると電解液の火花電圧が低下してしまう
ので好ましくない．
［実施例］
先ず，本発明に係る電解液の組成物を第ｌ表に示す．電
導度および火花電圧は液温が４０℃のものである．
次に、第１表に記載の電解液を使用し、定格２００Ｖ・
１０００μＦのアルミニウム電解コンデンサを各２０個
製作した。この電解コンデンサの３０５℃での高温負荷
試験の結果を第２表に示す。値は各２０個の平均値であ
る．
第１表
電解液の組成
［苅果］
本発明に係る電解液を使用した電解コンデンサは、第２
表から分かるように、高温度で長時間にわたって安定な
電解コンデンサを提供し得るものである．[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an electrolytic solution for driving an electrolytic capacitor. [Prior art] As a driving electrolyte for medium-voltage electrolytic capacitors, ammonium benzoate dissolved in a solvent mainly composed of ethylene glycol is often used, and boric acid and mannitol are further added to extend the life of the electrolytic capacitor. The added electrolytic solution (Japanese Patent Publication No. 60-38860) is also known. [Problem to be solved by the invention] An electrolytic solution consisting of ethylene glycol, ammonium benzoate, boric acid, and mannitol has good heat resistance, but
The problem is that it is difficult to obtain the electrolyte conductivity required to reduce loss in electrolytic capacitors. In other words, when the solute concentration is increased in this electrolyte, the reactivity with the aluminum electrode foil increases, the electrode foil corrodes, and hydrogen gas is generated, making it difficult to extend the life of the electrolytic capacitor. It was Nachino. [Means for Solving the Problems] However, in order to further extend the life of the electrolytic capacitor, the present invention adds phosphoric acid trialkyl esters to an electrolytic solution consisting of ethylene glycol, ammonium benzoate, boric acid, and mannitol. This is what I did. When phosphoric acid trialkyl esters are added to the electrolytic solution, the phosphoric acid trialkyl esters are adsorbed on the surface of the aluminum electrode foil, and particularly suppress natural corrosion of the cathode foil. This suppresses the generation of hydrogen gas inside the electrolytic capacitor and extends the life of the electrolytic capacitor. Examples of phosphoric acid trialkyl esters include triethyl phosphate, tributyl phosphate, trihexyl phosphate, and trioctyl phosphate, with trihexyl and trioctyl phosphate having a large molecular weight being preferred. The amount of phosphoric acid trialkyl esters added is preferably 0.5 to 5 wt% (if it is less than 0.5 wt%, the effect will be small, and if it exceeds 5 wt%, the spark voltage of the electrolyte will decrease. [Example] First, the composition of the electrolytic solution according to the present invention is shown in Table 1. The conductivity and spark voltage are measured at a liquid temperature of 40°C. Uses electrolyte, rated at 200V.
Twenty 1000 μF aluminum electrolytic capacitors were manufactured. Table 2 shows the results of a high temperature load test of this electrolytic capacitor at 305°C. The values are the average values of each 20 samples. Table 1 Composition of electrolyte [Rice] The electrolytic capacitor using the electrolyte according to the present invention is
As can be seen from the table, it is possible to provide an electrolytic capacitor that is stable at high temperatures for long periods of time.
Claims (1)
アンモニウムを溶解し、硼酸およびマンニットを加えた
溶液にリン酸トリアルキルエステル類を添加したことを
特徴とする電解コンデンサ駆動用電解液。(1) An electrolytic solution for driving an electrolytic capacitor, characterized in that ammonium benzoate is dissolved in a solvent mainly composed of ethylene glycol, and a phosphoric acid trialkyl ester is added to a solution in which boric acid and mannitol are added.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15272489A JPH0318008A (en) | 1989-06-15 | 1989-06-15 | Electrolyte for driving electrolytic-capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15272489A JPH0318008A (en) | 1989-06-15 | 1989-06-15 | Electrolyte for driving electrolytic-capacitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0318008A true JPH0318008A (en) | 1991-01-25 |
Family
ID=15546769
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15272489A Pending JPH0318008A (en) | 1989-06-15 | 1989-06-15 | Electrolyte for driving electrolytic-capacitor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0318008A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6024425A (en) * | 1994-09-16 | 2000-02-15 | Daifuku Co., Ltd. | Storage apparatus |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02251125A (en) * | 1989-03-24 | 1990-10-08 | Marcon Electron Co Ltd | Electrolyte for driving electrolytic capacitor |
-
1989
- 1989-06-15 JP JP15272489A patent/JPH0318008A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02251125A (en) * | 1989-03-24 | 1990-10-08 | Marcon Electron Co Ltd | Electrolyte for driving electrolytic capacitor |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6024425A (en) * | 1994-09-16 | 2000-02-15 | Daifuku Co., Ltd. | Storage apparatus |
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