DE767900C - Electrolyte for electrolytic capacitors - Google Patents
Electrolyte for electrolytic capacitorsInfo
- Publication number
- DE767900C DE767900C DEN43047D DEN0043047D DE767900C DE 767900 C DE767900 C DE 767900C DE N43047 D DEN43047 D DE N43047D DE N0043047 D DEN0043047 D DE N0043047D DE 767900 C DE767900 C DE 767900C
- Authority
- DE
- Germany
- Prior art keywords
- electrolyte
- electrolytic capacitors
- solution
- electrolytes
- electrolytic
- 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
- 239000003990 capacitor Substances 0.000 title claims description 11
- 239000003792 electrolyte Substances 0.000 title claims description 11
- 150000002148 esters Chemical class 0.000 claims description 4
- 239000002253 acid Substances 0.000 claims description 3
- 230000002378 acidificating effect Effects 0.000 claims description 3
- 150000007513 acids Chemical class 0.000 claims description 3
- 150000003839 salts Chemical class 0.000 claims description 3
- 150000001408 amides Chemical class 0.000 claims description 2
- 239000000243 solution Substances 0.000 description 7
- 239000000126 substance Substances 0.000 description 6
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 5
- 239000004327 boric acid Substances 0.000 description 4
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- DLFVBJFMPXGRIB-UHFFFAOYSA-N Acetamide Chemical compound CC(N)=O DLFVBJFMPXGRIB-UHFFFAOYSA-N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- ZHNUHDYFZUAESO-UHFFFAOYSA-N Formamide Chemical compound NC=O ZHNUHDYFZUAESO-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 230000001476 alcoholic effect Effects 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- FEWJPZIEWOKRBE-JCYAYHJZSA-N Dextrotartaric acid Chemical compound OC(=O)[C@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-JCYAYHJZSA-N 0.000 description 1
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 description 1
- 150000001298 alcohols Chemical group 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- -1 boric acid ester Chemical class 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- SXQFCVDSOLSHOQ-UHFFFAOYSA-N lactamide Chemical compound CC(O)C(N)=O SXQFCVDSOLSHOQ-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 150000007519 polyprotic acids Polymers 0.000 description 1
- 239000011975 tartaric acid Substances 0.000 description 1
- 235000002906 tartaric acid Nutrition 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Elektrolyt für elektrolytische Kondensatoren Zur Herstellung elektrolytischer Kondensatoren benötigt man Elektrolyte, die als die zweite Belegung des Kondensators dienen. Je nach den Eigenschaften dieser Elektrolyte hat der Kondensator gute oder weniger gute Eigenschaften. Die Qualität des Kondensators wird also vorwiegend durch den Elektrolyt bedingt.Electrolyte for electrolytic capacitors For the production of electrolytic capacitors Capacitors need electrolytes as the second occupancy of the capacitor to serve. Depending on the properties of these electrolytes, the capacitor has good or less good properties. The quality of the capacitor is so predominantly through the electrolyte.
Bisher stellte man diese Elektrolyte her durch Auflösung eines ionogenen Stoffes in Wasser oder in Alkoholen. Die wäßrigen Lösungen haben den Nachteil, daß sie korrodierend auf die Kondensatoranode wirken. Die alkoholischen Lösungen leiden unter der elektrolytischen Zersetzlichkeit der Alkohole. Letztere werden elektrolytisch oxydiert oder reduziert, so daß nach längerer Einwirkung Produkte entstehen, die den pH-Wert der Lösung ändern und zur Korrosion führen.Up until now, these electrolytes were produced by dissolving an ionogenic one Substance in water or in alcohol. The aqueous solutions have the disadvantage that they have a corrosive effect on the capacitor anode. The alcoholic solutions suffer under the electrolytic decomposition of alcohols. The latter become electrolytic oxidizes or reduces, so that after prolonged exposure products arise that change the pH of the solution and cause corrosion.
Elektrolyte, die diese Nachteile nicht besitzen, bestehen gemäß der Erfindung aus einer Lösung von sauren Estern, deren Salzen und schwachen Säuren in Säureamiden, und zwar dergestalt, daß die Auswahl der Bestandteile so erfolgt, daß die erhaltene Lösung einen pH-Wert von q. bis 6 aufweist. Man verwendet flüssige oder niedrig schmelzende Stoffe dieser Gattung, z. B. Formamid, Acetamid, Lactamid u. dgl., und löst darin das zu verwendende Ionogen auf. Diese Stoffe haben den Vorteil, daß selbst bei Spaltung durch elektrolytische Kräfte oder durch übermäßige Wärme immer wieder Produkte entstehen, die neutral reagieren und somit harmlos in ihrer Wirkung auf den Kondensator sind. Diese Stoffe selbst haben den Vorteil, daß sie sich gegen die gelösten Ionogene indifferent verhalten. Sie beteiligen sich innerhalb eines bestimmten PH-Wertes nicht an chemischen Umsatzungen. Dieser pH-Wert ist zwischen .I und 6, und dies ist, wie Untersuchungen zeigten, der pH-Wert, bei dem die Kondensatoren bei größter Lebensdauer am besten arbeiten.Electrolytes that do not have these disadvantages exist according to Invention from a solution of acidic esters, their salts and weak acids in acid amides, in such a way that the components are selected in such a way that that the solution obtained has a pH of q. to 6. Liquid is used or low-melting substances of this type, e.g. B. formamide, acetamide, lactamide and the like, and solves therein the one to be used Ionic on. These substances have the advantage that even with splitting by electrolytic forces or by excessive heat again and again produces products that react neutrally and thus are harmless in their effect on the capacitor. These substances themselves have the The advantage is that they are indifferent to the dissolved ionogens. You participate do not take part in chemical reactions within a certain pH value. This pH is between .I and 6, and this, research has shown, is the pH, in which the capacitors work best with the longest service life.
Als ionogene Stoffe werden am besten solche verwendet, die bei der Lösung diesen günstigen pH-Wert ergeben. 1 icht zu verwenden sind z. B. Weinsäure, Zitronensäure, Borsäure. Phosphorsäure und die Salze dieser Säuren. Als sehr gut geeignet haben sich die sauren Ester von zwei- und mehrbasischen Säuren erwiesen, z. B. Zitronensäureester, Borsäureester.The ionogenic substances that are best used are those that are used in Solution result in this favorable pH value. 1 ot to be used are e.g. B. tartaric acid, Citric acid, boric acid. Phosphoric acid and the salts of these acids. As very good The acidic esters of di- and polybasic acids have proven suitable, z. B. citric acid esters, boric acid esters.
Ein Ester ist zur Herstellung von Elektrolyten schon bekanntgeworden. Dies ist derBorsäureester. Jedoch seine Anwendung geschah, soweit er beständig, in wäßriger oder alkoholischer Lösung. Im besten Falle lag ein Gemisch von Alkohol, Borsäureester und freier Borsäure vor, -,v obei die Borsäure nach längerem Lagern wieder auskristallisierte und damit die Stromwege zur Anode blockierte. Auch dieser letztere _Nachteil wird durch den gekennzeichneten Elektrolyt behoben.An ester has already become known for the production of electrolytes. This is the boric acid ester. However, its application was, insofar as it was in aqueous or alcoholic solution. In the best case there was a mixture of alcohol, Boric acid esters and free boric acid before -, especially boric acid after prolonged storage crystallized out again and thus blocked the current paths to the anode. Also this one the latter disadvantage is eliminated by the marked electrolyte.
Während man bisher ein praktisch imdefinierbares Gemisch vorliegen hatte, bestehen erfindungsgemäß die Elektrolyte aus einer Lösung einheitlicher Stoffe in einem einheitlichen Stoff. Dadurch werden die bisher so komplizierten Verhältnisse bezüglich Ionenkonzentration, Leitfähigkeit und Viskosität wesentlich übersichtlicher und für die Fabrikation sicherer, und gleichzeitig wird die Gefahr der Korrosion praktisch ausgeschlossen.While so far there is a practically in the definable mixture According to the invention, the electrolytes consist of a solution of uniform substances in a uniform fabric. This will make the situation so complicated up to now much clearer with regard to ion concentration, conductivity and viscosity and safer for fabrication, while increasing the risk of corrosion practically impossible.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEN43047D DE767900C (en) | 1939-03-11 | 1939-03-11 | Electrolyte for electrolytic capacitors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEN43047D DE767900C (en) | 1939-03-11 | 1939-03-11 | Electrolyte for electrolytic capacitors |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE767900C true DE767900C (en) | 1954-10-04 |
Family
ID=7348646
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DEN43047D Expired DE767900C (en) | 1939-03-11 | 1939-03-11 | Electrolyte for electrolytic capacitors |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE767900C (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1710073A (en) * | 1927-03-21 | 1929-04-23 | Ruben Samuel | Electrical condenser |
| US2104733A (en) * | 1935-02-02 | 1938-01-11 | Brennan | Electrolyte and method of making same |
| GB487102A (en) * | 1936-06-16 | 1938-06-15 | British Thomson Houston Co Ltd | Improvements in and relating to electrolytic devices |
| DE695398C (en) * | 1936-01-07 | 1940-08-24 | Aeg | Electrolyte for electrolytic devices, especially for electrolytic capacitors |
-
1939
- 1939-03-11 DE DEN43047D patent/DE767900C/en not_active Expired
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1710073A (en) * | 1927-03-21 | 1929-04-23 | Ruben Samuel | Electrical condenser |
| US2104733A (en) * | 1935-02-02 | 1938-01-11 | Brennan | Electrolyte and method of making same |
| DE695398C (en) * | 1936-01-07 | 1940-08-24 | Aeg | Electrolyte for electrolytic devices, especially for electrolytic capacitors |
| GB487102A (en) * | 1936-06-16 | 1938-06-15 | British Thomson Houston Co Ltd | Improvements in and relating to electrolytic devices |
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