Capacitor and method for producing a capacitor
View Patent ↗An electrode for an electrolytic capacitor includes a substrate comprising titanium; a carbide layer adjacent the substrate; and a carbonaceous layer adjacent the carbide layer and including means for enhancing the capacitance of the electrode.
1. An electrode for an electrolytic capacitor comprising:
a substrate comprising titanium;
a carbide layer adjacent the substrate; and
a carbonaceous layer adjacent the carbide layer and including means for enhancing the capacitance of the electrode.
2. The electrode of claim 1 , wherein the means for enhancing the capacitance of the electrode comprises activated carbon.
3. The electrode of claim 2 , wherein the activated carbon includes functional groups that include oxygen, the functional groups being selected from CO, COOH, and C═O.
4. The electrode of claim 2 , wherein the means for enhancing the capacitance of the electrode further comprises an oxide of manganese.
5. The electrode of claim 1 , wherein the carbide layer comprises titanium.
6. The electrode of claim 1 , wherein the electrode is a cathode for an electrolytic capacitor.
7. The electrode of claim 1 , wherein the electrode has a capacitance of greater than approximately 10 milliFarads per square centimeter.
8. The electrode of claim 1 , wherein the substrate has a roughness of between approximately 2 and 5 micrometers.
9. The electrode of claim 1 , wherein the thickness of the carbide layer is less than approximately 10 nanometers.
10. A capacitor comprising:
a cathode;
an anode; and
an electrolyte provided intermediate the cathode and the anode;
wherein the cathode comprises:
a substrate comprising titanium;
a carbide layer adjacent the substrate; and
a carbonaceous layer adjacent the carbide layer comprising a material for enhancing the capacitance of the cathode.
11. The capacitor of claim 10 , wherein the material for enhancing the capacitance of the cathode comprises activated carbon and an oxide of manganese.
12. The capacitor of claim 10 , wherein the carbide layer comprises titanium.
13. The capacitor of claim 10 , wherein the cathode has a capacitance of greater than approximately 10 milliFarads per square centimeter.
14. The capacitor of claim 10 , wherein the substrate has a roughness of between approximately 2 and 5 micrometers.
15. The capacitor of claim 10 , wherein the thickness of the carbide layer is less than approximately 10 nanometers.
16. An implantable medical device comprising:
an electrolytic capacitor having a cathode, an anode, and an electrolyte intermediate the cathode and the anode;
wherein the cathode comprises:
a substrate comprising titanium;
a carbide layer adjacent the substrate; and
a carbonaceous layer adjacent the carbide layer comprising a material for enhancing the capacitance of the cathode;
wherein the implantable medical device is configured to provide a therapeutic high voltage treatment.
17. The implantable medical device of claim 16 , wherein the material for enhancing the capacitance of the cathode comprises activated carbon and an oxide of manganese.
18. The implantable medical device of claim 16 , wherein the carbide layer comprises titanium.
19. The implantable medical device of claim 16 , wherein the cathode has a capacitance of greater than approximately 10 milliFarads per square centimeter.
20. The implantable medical device of claim 16 , wherein the thickness of the carbide layer is less than approximately 10 nanometers.
21. An electrolytic capacitor comprising:
a first electrode;
an electrolyte; and
a second electrode comprising:
a substrate comprising a metal;
a carbide layer provided proximate the substrate, and
a layer of material configured to enhance the capacitance of the second electrode;
wherein the second electrode is an anode and the metal comprises aluminum.
22. The electrolytic capacitor of claim 21 , wherein the substrate comprises a surface, the surface having a roughness of between approximately 2 and 5 micrometers.
23. An electrolytic capacitor comprising:
a first electrode;
an electrolyte; and
a second electrode comprising:
a substrate comprising a metal selected from the group consisting of titanium, aluminum, tantalum, niobium, zirconium, silver, and steel, and alloys and combinations thereof;
a carbide layer provided proximate the substrate, and
a layer of material configured to enhance the capacitance of the second electrode;
wherein the second electrode further comprises at least one material selected from the group consisting of aluminum, titanium, niobium, zirconium, and combinations thereof.
24. An electrolytic capacitor comprising:
a first electrode;
an electrolyte; and
a second electrode comprising:
a substrate comprising a metal;
a carbide layer provided proximate the substrate, the carbide layer comprising titanium carbide; and
a layer of material configured to enhance the capacitance of the second electrode.
25. An electrolytic capacitor comprising:
a first electrode;
an electrolyte; and
a second electrode comprising:
a substrate comprising a metal selected from the group consisting of titanium, aluminum, tantalum, niobium, zirconium, silver, and steel, and alloys and combinations thereof;
a carbide layer provided proximate the substrate, and
a layer of material configured to enhance the capacitance of the second electrode;
wherein the layer of material comprises a carbonaceous material that comprises activated carbon and an oxide of manganese.