| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 361516000 | Cathode type electrode (e.g., cathode casing) | 8 |
| 20090237863 | ELECTROPHORETICALLY DEPOSITED CATHODE CAPACITOR - An electrolytic capacitor includes a metal case, a porous pellet anode disposed within the metal case, an electrolyte disposed within the metal case, and a cathode element formed of an electrophoretically deposited metal or metal oxide powder of a uniform thickness disposed within the metal case and surrounding the anode. A method of manufacturing an electrolytic capacitor includes providing a metal case, electrophoretically depositing on the metal can a refractory metal oxide to form a cathode element, and placing a porous pellet anode and an electrolyte within the can such that the cathode element and the anode element being separated by the electrolyte. | 09-24-2009 |
| 20100067174 | Substrate for Use in Wet Capacitors - A porous substrate for use in a wide variety of applications, such as wet capacitors, is provided. The substrate is formed by subjecting a metal substrate to a voltage while in solution to initiate anodic formation of an oxide film. Contrary to conventional anodization processes, however, the newly created oxide quickly breaks down to once again expose the metal surface to the electrolytic solution. This may be accomplished in a variety of ways, such as by raising the voltage of the solution above a critical level known as the “breakdown voltage”, employing a corrosive acid in the solution that dissolves the oxide, etc. Regardless of the mechanism employed, the nearly simultaneous process of oxide growth/breakdown results in the formation of a structure having pores arranged at substantially regular intervals. The resulting structure is highly porous and can exhibit excellent adhesion to electrochemically-active materials and stability in aqueous electrolytes. | 03-18-2010 |
| 20100142124 | Cathode for Use in a Wet Capacitor - A cathode containing a metal substrate that possesses a micro-roughened surface imparted by spark anodization is provided. The surface is formed by contacting the substrate with an electrolytic solution and applying a voltage to form a dielectric sub-oxide layer. The voltage is raised to a sufficiently high level to initiate “sparking” at the surface of the substrate, which is believed to create high local surface temperatures sufficient to etch away the substrate. This results in the formation of a “micro-roughened” surface having a plurality elevated regions. These elevated regions can increase the effective surface area and thus allow for the formation of capacitors with increased cathode capacitance for a given size and/or capacitors with a reduced size for a given capacitance. The elevated regions may also exhibit excellent adhesion to additional electrochemically-active materials and provide enhanced stability in certain liquid electrolytes. | 06-10-2010 |
| 20120069490 | Conductive Polymer Coating for Wet Electrolytic Capacitor - A wet electrolytic capacitor that includes a porous anode body containing a dielectric layer, a cathode containing a metal substrate on which is disposed a conductive polymer coating, and an electrolyte is provided. The conductive polymer coating is in the form of a dispersion of particles having a relatively small size, such as an average diameter of from about 1 to about 500 nanometers, in some embodiments from about 5 to about 400 nanometers, and in some embodiments, from about 10 to about 300 nanometers. The relatively small size of the particles used in the coating increases the surface area that is available for adhering to the metal substrate, which in turn improves mechanical robustness and electrical performance (e.g., reduced equivalent series resistance and leakage current). Another benefit of employing such a dispersion for the conductive polymer coating is that it may be able to better cover crevices of the metal substrate and improve electrical contact. | 03-22-2012 |
| 20120069491 | Technique for Forming a Cathode of a Wet Electrolytic Capacitor - A technique for forming a cathode of a wet electrolytic capacitor is provided. The cathode contains a metal substrate having a roughened surface and a conductive coating that contains a substituted polythiophene. The degree of surface contact between the conductive coating and the roughened surface is enhanced in the present invention by selectively controlling the manner in which the conductive coating is formed. More particularly, the conductive coating is formed by applying a precursor solution to the roughened surface that includes both a precursor thiophene monomer and an oxidative catalyst. Contrary to techniques in which either the monomer or catalyst is applied separately and initially contacts the metal surface, the presence of the monomer and catalyst within the same solution allows polymer chains to grow immediately adjacent to the surface of the metal substrate and within the pits. This can significantly increase the degree of contact between the conductive coating and metal substrate, thereby resulting in improved mechanical robustness and electrical performance (e.g., reduced equivalent series resistance and leakage current). To minimize the likelihood of premature polymerization, the oxidative catalyst is also employed in an amount less than what is required to fully react all of the reagent assuming 100% yield (i.e., “stoichiometric amount”). This can slow the polymerization of the monomer, creating oligomers that are shorter than if fully polymerized, which can better penetrate into the roughened regions of the metal substrate. | 03-22-2012 |
| 20130208404 | LITHIUM ION CAPACITOR - Provided is a lithium ion capacitor that can maintain a high capacity retention rate and suppress an increase in internal resistance even after high-load charging-discharging is repeated many times and that has long service life because the occurrence of a short circuit due to precipitation of lithium on the negative electrode is prevented. | 08-15-2013 |
| 20150340162 | CHEMICAL CONVERSION BODY FOR NIOBIUM CAPACITOR POSITIVE ELECTRODE, AND PRODUCTION METHOD THEREFOR - A chemical conversion body, electrolytic capacitor and production method are disclosed. The capacitor contains a chemical conversion body obtained by sintering a niobium granulated product. The sintered product is obtained by mixing niobium hydride and a niobium-aluminum intermetallic compound, pulverizing the mixture, and allowing the mixture to agglomerate by heat treatment to thereby form a granulated product; sintering the granulated product; and subjecting the sintered body to electrolytic oxidation to form a dielectric layer on the surface of the sintered body; in which chemical conversion body the sites of aluminum localization having a size of 0.1 μm to 0.5 μm are scattered in a depth of less than 0.06 μm from the surface of the dielectric layer. Nb | 11-26-2015 |
| 20160189874 | ELECTRODE STRUCTURE FOR CAPACITOR, ELECTROLYTIC CAPACITOR, AND METHOD OF MANUFACTURING THE SAME - An electrode structure for a capacitor, an electrolytic capacitor, and a method of manufacturing the same are provided. An electrode structure for a capacitor includes a polymer film; a thin-film electrode layer disposed on the polymer film; and a metal oxide layer disposed on the thin-film electrode layer. | 06-30-2016 |
