A wet tantalum electrolytic capacitor containing a cathode, fluidic working electrolyte, and anode formed from an anodically oxidized sintered porous tantalum pellet is described. The pellet is formed from a pressed tantalum powder. The tantalum powder is formed by reacting a tantalum oxide compound, for example, tantalum pentoxide, with a reducing agent that contains a metal having an oxidation state of 2 or more, for example, magnesium. The resulting tantalum powder is nodular or angular and has a specific charge that ranges from about 9,000 μF*V/g to about 11,000 μF*V/g. Using this powder, wet tantalum electrolytic capacitors have breakdown voltages that ranges from about 340 volts to about 450 volts. This makes the electrolytic capacitors ideal for use in an implantable medical device.

An electrolytic capacitor includes an anode body including a dielectric layer, a cathode body, and a conductive polymer layer and a liquid component that are disposed between the anode body and the cathode body. The cathode body includes a base material part having an outer surface that is roughened surface and has a pore opened at the outer surface, and an inorganic conductive layer covering at least a part of the outer surface. The base material part includes a first coating layer disposed along at least a part of inner wall of the pore. The first coating layer contains phosphorus.

An electrolytic capacitor includes an anode body including a dielectric layer, a cathode body, and a conductive polymer layer and a liquid component that are disposed between the anode body and the cathode body. The cathode body includes a base material part having an outer surface that is roughened surface and has a pore opened at the outer surface, and an inorganic conductive layer covering at least a part of the outer surface. The base material part includes a first coating layer disposed along at least a part of inner wall of the pore. The first coating layer contains phosphorus.

A capacitor and a method for producing a capacitor are disclosed. In an embodiment, the capacitor includes a winding having a cathode foil, an anode foil and separators arranged therebetween, an overlap-free region, wherein the cathode foil does not overlap with the anode foil in the overlap-free region, wherein the overlap-free region adjoins an overlapping region, and wherein the cathode foil overlaps with the anode foil in a lateral direction in the overlapping region, and a cathode contact arranged in the overlap-free region, the cathode contact contacting the cathode foil.

A capacitor and capacitor assemblies are provided, configured to prevent damage from shock and/or vibration. A capacitor assembly according to the invention comprises an anode plate having an anode plate wire extending from a surface of the anode plate. An anode wire holder is positioned around at least a portion of the anode plate wire. A wire separator comprising a channel is provided, at least a portion of the anode plate wire received within the channel. Methods of forming capacitors and capacitor assemblies are also provided.

A capacitor and capacitor assemblies are provided, configured to prevent damage from shock and/or vibration. A capacitor assembly according to the invention comprises an anode plate having an anode plate wire extending from a surface of the anode plate. An anode wire holder is positioned around at least a portion of the anode plate wire. A wire separator comprising a channel is provided, at least a portion of the anode plate wire received within the channel. Methods of forming capacitors and capacitor assemblies are also provided.

In a solid electrolytic capacitor having an electrolyte layer consisting of a solid electrolyte layer and a liquid, the solid electrolytic capacitor, which suppresses a dedoping reaction and which ESR thereof does not keenly increase, in particular, after a loading of heat stress, is provided. In the solid electrolytic capacitor, the electrolyte layer is formed in the capacitor element which is formed by opposing an anode foil and a cathode foil. This electrolyte layer includes the solid electrolyte layer and the liquid. The solid electrolyte layer includes a conductive polymer consisting of a dopant and a conjugated polymer. The liquid is filled in air gaps in the capacitor element on which the solid electrolyte layer is formed. The electrolyte layer includes ammonia as a cation component, and a molecular ratio of the cation component relative to 1 mol of a functional group which can contribute to a doping reaction of the dopant, in the electrolyte layer is 23 or less.

In a solid electrolytic capacitor having an electrolyte layer consisting of a solid electrolyte layer and a liquid, the solid electrolytic capacitor, which suppresses a dedoping reaction and which ESR thereof does not keenly increase, in particular, after a loading of heat stress, is provided. In the solid electrolytic capacitor, the electrolyte layer is formed in the capacitor element which is formed by opposing an anode foil and a cathode foil. This electrolyte layer includes the solid electrolyte layer and the liquid. The solid electrolyte layer includes a conductive polymer consisting of a dopant and a conjugated polymer. The liquid is filled in air gaps in the capacitor element on which the solid electrolyte layer is formed. The electrolyte layer includes ammonia as a cation component, and a molecular ratio of the cation component relative to 1 mol of a functional group which can contribute to a doping reaction of the dopant, in the electrolyte layer is 23 or less.

A capacitor includes a capacitor element that holds a predetermined solution between an anode foil and a cathode foil wound up with a separator in between, a body case that is formed in the shape of a bottomed tube closed at one end with a wall and open at the other end to have an opening, a liquid supply sheet that is arranged between the inner face of the case and the outer face of the element, and a sealing member that seals the opening. The solution has a sealing member deterioration preventing agent dissolved in a lipophilic solvent. The sheet has an absorption portion that makes contact with the separator to absorb the solution and a supply portion that makes contact with the sealing member to supply it with the solution.

A capacitor includes a capacitor element that holds a predetermined solution between an anode foil and a cathode foil wound up with a separator in between, a body case that is formed in the shape of a bottomed tube closed at one end with a wall and open at the other end to have an opening, a liquid supply sheet that is arranged between the inner face of the case and the outer face of the element, and a sealing member that seals the opening. The solution has a sealing member deterioration preventing agent dissolved in a lipophilic solvent. The sheet has an absorption portion that makes contact with the separator to absorb the solution and a supply portion that makes contact with the sealing member to supply it with the solution.