DE879736C - Electrolyte for electrolytic capacitors - Google Patents
Electrolyte for electrolytic capacitorsInfo
- Publication number
- DE879736C DE879736C DEB9474D DEB0009474D DE879736C DE 879736 C DE879736 C DE 879736C DE B9474 D DEB9474 D DE B9474D DE B0009474 D DEB0009474 D DE B0009474D DE 879736 C DE879736 C DE 879736C
- Authority
- DE
- Germany
- Prior art keywords
- electrolyte
- electrolytic capacitors
- added
- gallic acid
- capacitor
- 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.)
- Expired
Links
- 239000003792 electrolyte Substances 0.000 title claims description 14
- 239000003990 capacitor Substances 0.000 title claims description 10
- LNTHITQWFMADLM-UHFFFAOYSA-N gallic acid Chemical compound OC(=O)C1=CC(O)=C(O)C(O)=C1 LNTHITQWFMADLM-UHFFFAOYSA-N 0.000 claims description 8
- 229940074391 gallic acid Drugs 0.000 claims description 4
- 235000004515 gallic acid Nutrition 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 3
- 150000005846 sugar alcohols Polymers 0.000 claims description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 2
- 239000003638 chemical reducing agent Substances 0.000 claims description 2
- 241000282376 Panthera tigris Species 0.000 claims 1
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 150000007513 acids Chemical class 0.000 description 2
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- OTRAYOBSWCVTIN-UHFFFAOYSA-N OB(O)O.OB(O)O.OB(O)O.OB(O)O.OB(O)O.N.N.N.N.N.N.N.N.N.N.N.N.N.N.N Chemical compound OB(O)O.OB(O)O.OB(O)O.OB(O)O.OB(O)O.N.N.N.N.N.N.N.N.N.N.N.N.N.N.N OTRAYOBSWCVTIN-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 235000011187 glycerol Nutrition 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/004—Details
- H01G9/022—Electrolytes; Absorbents
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Electric Double-Layer Capacitors Or The Like (AREA)
Description
Elektrolyt für Elektrolytkondensatoren Die Erfindung bezieht sich auf einen Elektrolyt für Elektrolvtkondensatoren. Solche Elektrolv te besitzen im allgemeinen als wesentlichen Bestandteil einen mehrwertigen Alkohol, wie z. B. Glyzerin oder Glykol. Es hat sich herausgestellt, daß dieser -z@Ilcoliol während des Betriebes des Kondensators in geringem Maße oxydiert. Dadurch entstehen namentlich in der Nähe der Anode Säuren, die mengenmäßig zwar gering sind, jedoch ausreichen, um Korrosionserscheinungen im Kondensator hervorzttrttfen.Electrolyte for Electrolytic Capacitors The invention relates to on an electrolyte for electrolytic capacitors. Such Elektrolv te have im general as an essential ingredient a polyhydric alcohol, such as. B. glycerine or glycol. It has been found that this -z @ Ilcoliol during operation of the capacitor is slightly oxidized. This results in the Near the anode acids, which are small in terms of quantity, but are sufficient to prevent corrosion emerge in the condenser.
Uni diesen Nachteil zu vermeiden, werden erfindungsgemäß dem Elektrolyt Stoffe beigegeben, die relativ beständige Reduktionsmittel darstellen, jedoch leichter oxydierbar sind als die mehrwertigen Alkohole. Diese freigegebenen Stoffe lenken wegen ihrer leichteren Oxydierbarkeit gewissermaßen die Oxydationswirkung der elektrochemischen Prozesse im Kondensator auf sich und verhindern so das Oxydieren des Alkohols und damit die schädliche, zur Korrosion der Elektroden führende Säurebildung.To avoid this disadvantage, according to the invention, the electrolyte Added substances that are relatively stable reducing agents, but lighter are more oxidizable than the polyhydric alcohols. Control these released substances because of their easier oxidizability, the oxidizing effect of the electrochemical one, so to speak Processes in the condenser and thus prevent the alcohol from oxidizing and thus the harmful formation of acids, which leads to the corrosion of the electrodes.
Als geeigneter Beigabestoff hat sich z. B. Gallussäure ergeben. Eine zweckmäßige Zusammensetzung des neuen Elektrolyts ist beispielsweise folgende: Man mischt 6oo g Glykol mit ,16o g Ammoniumpentaborat und setzt noch io,6 g, also i % Gallussäure hinzu. Nach dem Erhitzen dieser Mischung erhält man einen Elektrolyt, der einem mit ihm hergestellten Kendensator die Eigenschaft verleiht, bei - .I4° C noch eine Kapazität von 921/a der bei +. -2o° C gemessenen zu besitzen. Selbst nach längerem Betrieb ist in einem Kondensator mit dem neuen Elektrolyt keine Korrosion festzustellen. Außerdem sind Elektrolytkondensatoren, die den neuen Elektrolyt enthalten, länger, ohne an Spannung elegt zu sein, lagerfähig als Kondensatoren mit' den bisher verwendeten Elektrolyten. Bei diesen bildete sich die als Dielektrikum wirkende Oxydschicht auf den Elektroden, wenn der Kondensator längere Zeit nicht unter Spannung stand, allmählich zurück und wurde schwach leitend. Diese Rückbildung der Oxydschicht ist bei dem neuen Elektrolyt wesentlich herabgesetzt.As a suitable additive z. B. gallic acid. One a suitable composition of the new electrolyte is, for example, the following: Man mixes 600 g glycol with 16o g ammonium pentaborate and adds 10.6 g, i.e. i % Gallic acid added. After heating this mixture, an electrolyte is obtained, which gives a capacitor manufactured with it the property at - .I4 ° C still has a capacity of 921 / a that of +. -2o ° C measured to own. Self after longer operation there is no corrosion in a capacitor with the new electrolyte ascertain. In addition, electrolytic capacitors that contain the new electrolyte are Can be stored longer without being connected to voltage than capacitors with 'the previous ones used Electrolytes. In these, the formed as a dielectric Acting oxide layer on the electrodes if the capacitor is not used for a long time was under tension, gradually receding and became weakly conductive. This regression the oxide layer is significantly reduced in the new electrolyte.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEB9474D DE879736C (en) | 1945-04-05 | 1945-04-05 | Electrolyte for electrolytic capacitors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEB9474D DE879736C (en) | 1945-04-05 | 1945-04-05 | Electrolyte for electrolytic capacitors |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE879736C true DE879736C (en) | 1953-06-15 |
Family
ID=6956359
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DEB9474D Expired DE879736C (en) | 1945-04-05 | 1945-04-05 | Electrolyte for electrolytic capacitors |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE879736C (en) |
-
1945
- 1945-04-05 DE DEB9474D patent/DE879736C/en not_active Expired
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