A method of manufacturing high capacitance anode and cathode films of capacitors is revealed. Perform sputter deposition on a cathode aluminum foil in a vacuum chamber to form a cathode metal layer which is a titanium layer on a surface of the cathode aluminum foil. Then titanium continuously reacts with nitrogen to form cathode columnar crystal deposition on a surface of the cathode metal layer and get a cathode film. Perform sputter deposition on an anode aluminum foil in a vacuum chamber to form an anode metal layer which is a titanium layer on a surface of the anode aluminum foil. Then titanium continuously reacts with oxygen and nitrogen to form anode columnar crystal deposition on a surface of the anode metal layer and get an anode film. Next use the cathode and anode films with high capacitance to form cathode and anode electrodes of the capacitor.

A method of manufacturing high capacitance anode and cathode films of capacitors is revealed. Perform sputter deposition on a cathode aluminum foil in a vacuum chamber to form a cathode metal layer which is a titanium layer on a surface of the cathode aluminum foil. Then titanium continuously reacts with nitrogen to form cathode columnar crystal deposition on a surface of the cathode metal layer and get a cathode film. Perform sputter deposition on an anode aluminum foil in a vacuum chamber to form an anode metal layer which is a titanium layer on a surface of the anode aluminum foil. Then titanium continuously reacts with oxygen and nitrogen to form anode columnar crystal deposition on a surface of the anode metal layer and get an anode film. Next use the cathode and anode films with high capacitance to form cathode and anode electrodes of the capacitor.

Electrically-conductive articles are provided that include a current collector having a conductive coating. The current collector has nanoporous structure, such as that from etched metal, and a carbon coating in contact with the current collector. The carbon coating is free of binder. In some embodiments, the current collector includes etched aluminum. The provided electrically-conductive articles can be electrochemical capacitors or lithium-ion electrochemical cells.

Electrically-conductive articles are provided that include a current collector having a conductive coating. The current collector has nanoporous structure, such as that from etched metal, and a carbon coating in contact with the current collector. The carbon coating is free of binder. In some embodiments, the current collector includes etched aluminum. The provided electrically-conductive articles can be electrochemical capacitors or lithium-ion electrochemical cells.

According to one embodiment, an aluminum electrolytic capacitor includes an anode, a cathode, and a fiber film. The anode includes a first metal layer and a dielectric layer. The first metal layer includes aluminum. The dielectric layer is formed on the first metal layer. The cathode includes a second metal layer. The second metal layer includes aluminum. The fiber film is provided between the anode and the cathode. The fiber film includes a first layer and a second layer. The first layer includes a first fiber having a first diameter. The first layer is provided between the dielectric layer and the second layer. The second layer includes a second fiber having a second diameter smaller than the first diameter.

According to one embodiment, an aluminum electrolytic capacitor includes an anode, a cathode, and a fiber film. The anode includes a first metal layer and a dielectric layer. The first metal layer includes aluminum. The dielectric layer is formed on the first metal layer. The cathode includes a second metal layer. The second metal layer includes aluminum. The fiber film is provided between the anode and the cathode. The fiber film includes a first layer and a second layer. The first layer includes a first fiber having a first diameter. The first layer is provided between the dielectric layer and the second layer. The second layer includes a second fiber having a second diameter smaller than the first diameter.

Provide is an electrolytic capacitor for a middle-to-high voltage application that is equal to or higher than 100 V which suppresses the total amount of gas to be produced in the electrolytic capacitor. The anode foil of the electrolytic capacitor includes an enlarged surface portion provided with tunnel-shape pits formed from the foil surface in the thickness direction of the foil, and a dielectric oxide film formed on the surface of the enlarged surface portion. The cathode body of the electrolytic capacitor includes a cathode foil formed of a valve acting metal, and a carbon layer formed on the cathode foil.

A composite electrode foil roll for manufacturing an electrolytic capacitor, including: bands of electrode foils; strips of an isolating material positioned along a width of the composite electrode foil roll at a plurality of locations. The plurality of locations are at equal distances and correspond to a length of an inner cavity of a case of the electrolytic capacitor. The bands of electrode foils and strips of an isolating material are alternating. A method of manufacturing the composite electrode foil roll including alternating bands of electrode foils and strips of an isolating material. The strips are positioned along a width of the composite electrode foil roll at repeated locations. The repeated locations are at equal distances corresponding to a length of an inner cavity of a case of the electrolytic capacitor.

A composite electrode foil roll for manufacturing an electrolytic capacitor, including: bands of electrode foils; strips of an isolating material positioned along a width of the composite electrode foil roll at a plurality of locations. The plurality of locations are at equal distances and correspond to a length of an inner cavity of a case of the electrolytic capacitor. The bands of electrode foils and strips of an isolating material are alternating. A method of manufacturing the composite electrode foil roll including alternating bands of electrode foils and strips of an isolating material. The strips are positioned along a width of the composite electrode foil roll at repeated locations. The repeated locations are at equal distances corresponding to a length of an inner cavity of a case of the electrolytic capacitor.

This invention concerns a power module comprising a power device, a baseplate, circuit carrier, and a flat stacked aluminium electrolytic snubber capacitor comprising a layered structure of a cathode layer, a separator layer, comprising paper and an electrolyte and an anode layer, comprising an aluminium material with an aluminium oxide dielectric, wherein the circuit carrier are mounted on the baseplate, the power device and snubber capacitor are placed on the circuit carrier within the power module and electrically connected to the circuit carrier, the circuit carrier being configured for providing an electrical connection between the power device and the snubber capacitor.