An electrochemical device which is an alkali metal battery or an alkaline earth metal battery, wherein only a positive electrode is an electrode having a perfluoropolyether group-containing compound in a surface thereof.

An electrochemical device which is an alkali metal battery or an alkaline earth metal battery, wherein only a positive electrode is an electrode having a perfluoropolyether group-containing compound in a surface thereof.

A capacitor case sealed to retain electrolyte; a sintered anode disposed in the capacitor case, the sintered anode having a shape wherein the sintered anode includes a mating portion; a conductor coupled to the sintered anode, the conductor sealingly extending through the capacitor case to a terminal disposed on an exterior of the capacitor case; a sintered cathode disposed in the capacitor case, the sintered cathode having a shape that mates with the mating portion of the sintered anode such that the sintered cathode matingly fits in the mating portion of the sintered anode; a separator between the sintered anode and the sintered cathode; and a second terminal disposed on the exterior of the capacitor case and in electrical communication with the sintered cathode, with the terminal and the second terminal electrically isolated from one another.

A tantalum powder, a tantalum powder compact, a tantalum powder sintered body, a tantalum anode, an electrolytic capacitor and a preparation method for tantalum powder. The tantalum powder contains boron element, and the tantalum powder has a specific surface area of greater than or equal to 4 m.sup.2/g; the ratio of the boron content of the tantalum powder to the specific surface area of the tantalum powder is 2˜16; the boron content is measured in weight ppm, and the specific surface area is measured in m.sup.2/g; Powder that can pass through a ρ-mesh screen in the tantalum powder accounts for over 85% of the total weight of the tantalum powder, where ρ=150˜170; and the tantalum powder with high CV has a low leakage current and dielectric loss, and good moldability.

Anodes made from powder, such as tantalum powder, that is highly spherical is described. Methods to make the anodes are further described.

A cathode subassembly for use in an electrolytic capacitor may include a first separator sheet including a surface having first and second regions, where the second region extends from a perimeter of the first region to a first peripheral edge of the first sheet, a second peripheral edge of a second sheet is substantially aligned with the first peripheral edge, a conductive foil is sandwiched between the first and second sheets and disposed within the first region, the first and second sheets are adhered to each other in a sealing region extending from the second region to a region of a surface of the second sheet facing the second region, and the first sheet includes at least one first recess portion at the first peripheral edge aligned with at least one second recess portion at the second peripheral edge of the second sheet.

Implementations of the present disclosure generally relate to separators, high performance electrochemical devices, such as, batteries and capacitors, including the aforementioned separators, and methods for fabricating the same. In one implementation, a method of forming a separator for a battery is provided. The method comprises exposing a metallic material to be deposited on a surface of an electrode structure positioned in a processing region to an evaporation process. The method further comprises flowing a reactive gas into the processing region. The method further comprises reacting the reactive gas and the evaporated metallic material to deposit a ceramic separator layer on the surface of the electrode structure.

Implementations of the present disclosure generally relate to separators, high performance electrochemical devices, such as, batteries and capacitors, including the aforementioned separators, and methods for fabricating the same. In one implementation, a method of forming a separator for a battery is provided. The method comprises exposing a metallic material to be deposited on a surface of an electrode structure positioned in a processing region to an evaporation process. The method further comprises flowing a reactive gas into the processing region. The method further comprises reacting the reactive gas and the evaporated metallic material to deposit a ceramic separator layer on the surface of the electrode structure.

A MIM energy storage device comprising a bottom electrode; a plurality of electrically conductive vertical nanostructures; a bottom conduction-controlling layer conformally coating each nanostructure in the plurality of electrically conductive vertical nanostructures; and a layered stack of alternating conduction-controlling layers and electrode layers conformally coating the bottom conduction-controlling layer, the layered stack including at least a first odd-numbered electrode layer at a bottom of the layered stack, a first odd-numbered conduction-controlling layer directly on the first odd-numbered electrode layer, and a first even-numbered electrode layer directly on the first odd-numbered conduction-controlling layer. Each even-numbered electrode layer in the layered stack is electrically conductively connected to the bottom electrode; and each odd-numbered electrode layer in the layered stack is electrically conductively connected to any other odd-numbered electrode layer in the layered stack.

A MIM energy storage device comprising a bottom electrode; a plurality of electrically conductive vertical nanostructures; a bottom conduction-controlling layer conformally coating each nanostructure in the plurality of electrically conductive vertical nanostructures; and a layered stack of alternating conduction-controlling layers and electrode layers conformally coating the bottom conduction-controlling layer, the layered stack including at least a first odd-numbered electrode layer at a bottom of the layered stack, a first odd-numbered conduction-controlling layer directly on the first odd-numbered electrode layer, and a first even-numbered electrode layer directly on the first odd-numbered conduction-controlling layer. Each even-numbered electrode layer in the layered stack is electrically conductively connected to the bottom electrode; and each odd-numbered electrode layer in the layered stack is electrically conductively connected to any other odd-numbered electrode layer in the layered stack.