Abstract: A laminate type energy device includes a plurality of cells, each having a laminated body of at least two layers laminated such that positive and negative electrodes are alternated, with a separator through which an electrolyte and ions are passed, interposed between the positive and negative active material electrodes, and positive and negative lead-out electrodes are exposed. Tab electrodes that allow electricity to flow outside of the laminate type energy device are joined to the lead-out electrodes via connecting portions. The cells are sealed by a sheathing laminate sheet via a sealing material covering at least the connecting portions.

Abstract: An electrode foil for capacitor includes a substrate made of valve metal and a rough-surface layer on the substrate. The rough-surface layer includes a base layer on the substrate and a cover layer on the base layer. The base layer includes first fine particles made of valve metal. The cover layer includes second fine particles made of valve metal. The first fine particles have an average particle diameter larger than that of the second fine particles. This electrode foil has the rough-surface layer that can be produced stably by vapor deposition and provides an electrolytic capacitor having a large capacitance.

Abstract: Disclosed is an electrochemical capacitor which comprises an element, an electrolyte, and an outer case that houses the element and the electrolyte. The element comprises: a negative electrode that is obtained by forming a negative electrode layer on the surface of a collector, the negative electrode layer containing a carbon material in which lithium ions are absorbed; a positive electrode that is obtained by forming a positive electrode layer on the surface of a collector, the positive electrode layer absorbing ions; and a separator that is interposed between the negative electrode and the positive electrode. The electrolyte contains lithium ions. A coating film that contains lithium carbonate is formed on the surface of the carbon material that is contained in the negative electrode layer.

Abstract: An electrochemical capacitor includes a casing, an electrolyte, a storage element, a wiring and an adhesive layer. The casing forms a liquid chamber. The electrolyte is housed in the liquid chamber. The storage element is a storage element in which a positive electrode sheet, a separator sheet and a negative electrode sheet are laminated, being housed in the liquid chamber. A capacitance formed between a positive electrode active material in the positive electrode sheet and the electrolyte is greater than a capacitance formed between a negative electrode active material in the negative electrode sheet and the electrolyte. The wiring is connected to the liquid chamber. The adhesive layer is made of a conductive adhesive made with a synthetic resin including conductive particles. The adhesive layer covers the wiring, causes the positive electrode sheet to adhere to the casing, and electrically connects the wiring with the positive electrode sheet.

Abstract: A process is provided for producing an electrolytic capacitor element that can uniformly form a highly electrically conductive polymer having a nano thickness level on a nano porous anode element substrate and suitable for use in high-capacitance electrolytic capacitors used in emergency power supplies and backup power supplies in electronic equipment. An oxide film and an electrically conductive polymer film are formed by pulsed constant current electrolysis of a monomer for an electrically conductive polymer and a nanoporous valve action metal in an electrolysis solution comprising an ionic liquid.

Abstract: Provided is a lithium ion capacitor having a low internal resistance, a high energy density, and a high capacity retention rate. The lithium ion capacitor includes a positive electrode having a positive electrode active material layer formed on a roughened positive electrode current collector, a negative electrode having a negative electrode active material layer containing graphite-based particles formed on a negative electrode current collector, and an electrolytic solution containing a solution of a lithium salt in an aprotic organic solvent, wherein the total thickness of the positive electrode active material layer is 50 ?m to 140 ?m, and the ratio of mass of the positive electrode active material layer to the sum of the mass of the positive electrode active material layer and that of the negative electrode active material layer is 0.4 to 0.5.

Abstract: This document discusses capacitive elements including a first, second and third electrode arranged in a stack. The third electrode is positioned between the first and second electrode. An interconnect includes a unitary substrate shared with the first and second electrodes. The interconnect is adapted to deform to accommodate the stacked nature of the first and second electrodes. The unitary substrate includes a sintered material disposed thereon.

Abstract: A wet electrolytic capacitor that includes a porous anode body containing a dielectric layer, an electrolyte, and a cathode containing a metal substrate that is abrasive blasted is provided. Abrasive blasting may accomplish a variety of different purposes. For example, it may result in a surface that is substantially uniform and macroscopically smooth, thereby increasing the consistency of conductive coatings formed thereon. While possessing a certain degree of smoothness, the abrasive blasted surface is nevertheless micro-roughened so that it contains a plurality of pits. The pits provide an increased surface area, thereby allowing for increased cathode capacitance for a given size and/or capacitors with a reduced size for a given capacitance. A conductive coating that contains a substituted polythiophene is disposed on the micro-roughened surface.

Abstract: An electrode for a supercapacitor includes a block copolymer and active material particles. The block copolymer is used both to bind the particles together and to act as an electrolyte. The electrode does not have a porous structure, but rather it is pressed or rolled to achieve zero porosity and to ensure good contact between the particles and the block copolymer electrolyte. Thus, the entire surface of the active particles can be accessed for charge storage. Furthermore, the volume of such an electrode is smaller than typical electrodes with the same capacity, as none of the volume is wasted with additional, non-active binder material, offering a higher effective active material loading per unit volume. Electrodes made in this way, with block copolymer electrolyte and active materials, can also form free-standing films that are easy to handle during manufacture of supercapacitors.

Abstract: A present invention provide a lithium ion storage device capable of reliably doping a negative active material of a negative plate with lithium ions generated through dissolution of a lithium metal plate disposed in an electrode group. A conductive shielding member includes a current collecting metal foil and a negative active material layer formed on at least one surface of the current collecting metal foil. The conductive shielding member is provided between a lithium metal plate and a positive plate such that the lithium metal plate is sandwiched between the negative plate and the negative active material layer formed on the current collecting metal foil of the conductive shielding member.

Abstract: A capacitor includes a positive electrode base material, a dielectric layer, a positive electrode body, a dielectric layer, a negative electrode body, and a negative electrode base material. The positive electrode body is formed on the positive electrode base material and in part is in contact with the positive electrode base material. The positive electrode body is formed by association of a large number of metal particles, and the associated metal particles form a reticular network. The positive electrode base material and the positive electrode body (core part) are formed of a NiTi alloy containing Ni having a large work function. The dielectric layers (high-permittivity insulating film) are formed of titanium oxide. It is preferable that at least one Ni atomic layer is formed at an interface between the high-permittivity insulating film and the core part. Although the Ni atomic layer is preferably formed over the entire interface, the Ni atomic layer may be partially formed at the interface.

Abstract: The formation method of graphene includes the steps of forming a layer including graphene oxide over a first conductive layer; and supplying a potential at which the reduction reaction of the graphene oxide occurs to the first conductive layer in an electrolyte where the first conductive layer as a working electrode and a second conductive layer with a as a counter electrode are immersed. A manufacturing method of a power storage device including at least a positive electrode, a negative electrode, an electrolyte, and a separator includes a step of forming graphene for an active material layer of one of or both the positive electrode and the negative electrode by the formation method.

Abstract: A method of joining a connection member to a capacitor foil using a staking tool having a tip of less than 0.030? (0.762 mm) in diameter. Another embodiment couples multiple connection members of a capacitor together by edge-connecting each connection member to its substantially flush neighboring connection members. In one aspect, a capacitor includes a multi-anode stack connected at a first weld by a weld joint less than 0.060? (1.524 mm) in diameter and a tab attached to one of the anodes of the multi-anode stack at a second weld. In one aspect, an exemplary method joining one or more foils using a staking tool having a tip of less than approximately 0.060? (1.524 mm) in diameter. In another aspect, a capacitor including a capacitor case having an electrolyte therein and a high formation voltage anode foil having a porous structure and located within the capacitor case.

Abstract: A wet electrolytic capacitor that includes a porous anode body containing a dielectric layer, an electrolyte, and a cathode containing a metal substrate on which is disposed a conductive coating is provided. Prior to application of the conductive coating, the metal substrate is blasted with abrasive particles to enhance the ability of the substrate to adhere to the coating. The micro-roughened metal substrate can be treated after blasting so that substantially all of the abrasive particles are removed. This is accomplished by contacting the metal substrate with an extraction solution to remove the particles, and also by selectively controlling the nature of the abrasive particles so that they are dispersible (e.g., soluble) in the solution.

Abstract: A wet electrolytic capacitor that contains a sintered anode positioned with an interior space of a metal casing is provided. The anode and metal casing are of a size such that the anode occupies a substantial portion of the volume of the interior space. More particularly, the anode typically occupies about 70 vol. % or more, in some embodiments about 75 vol. % or more, in some embodiments from about 80 vol. % to about 98 vol. %, and in some embodiments, from about 85 vol. % to 95 vol. % of the interior space. Among other things, the use of an anode that occupies such a large portion of the interior space enhances volumetric efficiency and other electrical properties of the resulting capacitor.

Abstract: This document discusses capacitive elements including a first, second and third electrode arranged in a stack. The third electrode is positioned between the first and second electrode. An interconnect includes a unitary substrate shared with the first and second electrodes. The interconnect is adapted to deform to accommodate the stacked nature of the first and second electrodes. The unitary substrate includes a sintered material disposed thereon.

Abstract: An electrode material is created by forming a thin conformal coating of metal oxide on a highly porous carbon meta-structure. The highly porous carbon meta-structure performs a role in the synthesis of the oxide coating and in providing a three-dimensional, electronically conductive substrate supporting the thin coating of metal oxide. The metal oxide includes one or more metal oxides. The electrode material, a process for producing said electrode material, an electrochemical capacitor and an electrochemical secondary (rechargeable) battery using said electrode material is disclosed.

Abstract: An electric double layer capacitor electrode includes microporous carbon, wherein the microporous carbon includes pores having a size of 1 nm or less, which provide a combined pore volume of at least 0.3 cm3/g, pores having a size of from 1 nm to 2 nm, which provide a combined pore volume of at least 0.05 cm3/g, and less than 0.15 cm3/g combined pore volume of any pores having a size greater than 2 nm.

Abstract: Disclosed herein is a super capacitor electrical storage device, including a cathode and an anode respectively including electrode active materials having different average particle sizes, or a cathode and an anode respectively including electrode active materials having different pore structures in an active material. According to the present invention, a large-capacitance electrochemical capacitor having excellent withstand voltage, energy density, input and output characteristics, and high-rate charging and discharging cycle reliability may be provided, by changing structures of electrodes and design of materials therefor.

Abstract: A relatively thin planar anode for use in a wet electrolytic capacitor is provided. An anode leadwire is embedded within the anode and extends in a longitudinal direction therefrom. The wire may be formed from any electrically conductive material, such as tantalum, niobium, aluminum, hafnium, titanium, etc., as well as electrically conductive oxides and/or nitrides of thereof. To reduce the tendency of the leadwire to pull out of the anode due to stresses encountered during manufacturing (e.g., sintering) and/or use of the capacitor, the manner in which the wire is inserted is selectively controlled in the present invention. That is, at least a portion of the wire within the anode is bent at an angle relative to the longitudinal axis of the wire. This “bend” reduces the ease to which the wire can be pulled out in the longitudinal direction after the anode is pressed and sintered.

Abstract: A wet electrolytic capacitor that includes a sintered porous anode body containing a dielectric layer, a fluid electrolyte, and a cathode is provided. At least one longitudinally extending channel is recessed into the anode body. The channel may have a relatively high aspect ratio (length divided by width), such as about 2 or more, in some embodiments about 5 or more, in some embodiments from about 10 to about 200, in some embodiments from about 15 to about 150, in some embodiments from about 20 to about 100, and in some embodiments, from about 30 to about 60.

Abstract: The present subject matter includes a method of producing an apparatus for use in a patient, the method including etching an anode foil, anodizing the anode foil, assembling the anode foil, at least one cathode foil and one or more separators into a capacitor stack adapted to deliver from about 5.3 joules per cubic centimeter of capacitor stack volume to about 6.3 joules per cubic centimeter of capacitor stack volume at a voltage of between about 465 volts to about 620 volts, inserting the stack into a capacitor case, inserting the capacitor case into a device housing adapted for implant in a patient, connecting the capacitor to a component and sealing the device housing.

Abstract: The invention relates to the field of electrical engineering, in particular to multilayer film electrodes for electrolytic capacitors. The proposed multilayer anode is implemented as a substrate with a developed surface on which are sequentially arrayed a conforming layer of a valve metal, which is connected by a heterojunction formed by nanoparticles of the substrate metal and of the valve metal, which are geometrically closed between each other, and an oxide coating. The substrate is connected to the film base through a nanocomposite barrier layer, which comprises a differentiated mixture of the materials being joined, whose content varies relative to each other,[so that] together they amount to 100%, where the working surface is formed in practice by the substrate metal. What is novel is that a metal with a hardness 2-4 times greater than that of the valve metal, preferably titanium, is used as the substrate material, and the pores of the valve-metal layer are limited in size to the range 1-104 nm.

Abstract: A method includes connecting together one or more anode connection members of one or more anode foils and one or more cathode connection members of one or more cathode foils and electrically isolating the one or more anode foils from the one or more cathode foils. A capacitor stack includes a plurality of cathode layers having cathode connection members and a plurality of anode layers having anode connection members. The anode connection members are connected to the cathode connection members and configured such that the anode layers can be electrically separated from the cathode layers by cutting only the anode connection members or the cathode connection members.

Abstract: A wet electrolytic capacitor that contains an anode and a fluid electrolyte that are positioned within a casing is provided. The capacitor also contains a sealing assembly that employs a bushing having opposing inwardly facing, tapered surfaces between which an orifice is defined. To help inhibit leakage from the orifice, a liquid sealing member is also employed that contains a protrusion having outwardly facing, tapered surfaces that are configured to mate with the inwardly facing surfaces of the bushing. At least one outwardly facing surface of the sealing member is tapered at an angle greater than a respective inwardly facing surface of the bushing.

Abstract: The purpose of the present invention is to provide a capacitor having a novel structure in which electric energy is stored by means of charge transfer between a polarizable electrode and a metallic compound, as well as an electric double layer formed at an interface between the polarizable electrode and an electrolytic solution. The capacitor of the present invention has: a positive electrode collector; a positive electrode active material layer containing carbon material, polylactide, and V3+ compound; a separator; a negative electrode active material layer containing carbon material, polylactide, and V4+ compound; a negative electrode collector; and an electrolytic solution that is impregnated into the positive active material layer, the separator, and the negative active material layer.

Abstract: A feedthrough flat-through capacitor includes a capacitor having a first and second set of electrode plates, a first feedthrough passageway through the capacitor, a first lead disposed within the first feedthrough passageway and conductively coupled to the first set of electrode plates, a second feedthrough passageway through the capacitor disposed remote from the first feedthrough passageway, and a second lead disposed within the second feedthrough passageway and conductively coupled to the first set of electrode plates. The second set of electrode plates are typically conductively coupled to a ground. An EMI shield may be provided to electromagnetically isolate the first lead from the second lead.

Abstract: Electrochemical capacitors and methods for producing such electrochemical capacitors. The electrochemical capacitor can have an initial charged state and a cycled charged state and can include an anode, a cathode, and an electrolyte. The anode can include a first mixture having a first plurality of electrically conductive carbon-comprising particles having a first average porosity. The cathode can include a second mixture having a second plurality of electrically conductive carbon-comprising particles having a second average porosity greater than said first average porosity. The electrolyte can be physically and electrically contacting said anode and said cathode, and the first mixture in the cycled charged state can be substantially free of lithium metal particles and can further include a plurality of lithium ions intercalating the first plurality of carbon comprising particles. The mass ratio of the cathode and the electrolyte can be less than 1.

Abstract: A one-side pressed terminal is applied as a first anode (cathode) lead tab terminal and the one-side pressed terminal is connected to an anode (a cathode) foil in such a manner that a position in a radial direction of a lead is shifted inward after winding. A one-side pressed terminal is applied as a second anode (cathode) lead tab terminal and the one-side pressed terminal is connected to the anode (cathode) foil in such a manner that a position in the radial direction of a lead is shifted inward after winding. Thus, while retaining characteristics as an electrolytic capacitor, connection of the anode (cathode) lead tab terminal to the anode (cathode) foil can be achieved in a stable manner.

Abstract: A mixed solvent is prepared by dissolving acetic acid and lithium acetate in a mixture of isopropanol and water. This mixed solvent together with titanium alkoxide and carbon nanofiber (CNF) were introduced into a rotary reactor, the inner tube was rotated at a centrifugal force of 66,000 N (kgms?2) for 5 minutes to form a thin film of the reactant on the inner wall of the outer tube, and sheer stress and centrifugal force were applied to the reactant to allow promotion of chemical reaction, yielding CNF on which highly dispersed lithium titanate nanoparticle precursors are supported. The obtained composite powder was heated under nitrogen atmosphere at 900° C. for 3 minutes, yielding a composite powder in which highly dispersed lithium titanate nanoparticles are supported on CNF, wherein crystallization of lithium titanate was allowed to progress.

Abstract: A wet electrolytic capacitor that contains an anode and a fluid electrolyte that are positioned within a casing is provided. The capacitor also contains a sealing assembly that employs a bushing having opposing inwardly facing, tapered surfaces between which an orifice is defined. To help inhibit leakage from the orifice, a liquid sealing member is also employed that contains a protrusion having outwardly facing, tapered surfaces that are configured to mate with the inwardly facing surfaces of the bushing. At least one outwardly facing surface of the sealing member is tapered at an angle greater than a respective inwardly facing surface of the bushing.

Abstract: An electrode for capacitor includes a current collector having conductivity, a protective layer formed on the current collector, an anchor coat layer formed on the protective layer, and a polarizing electrode layer formed on the anchor coat layer. The protective layer contains an oxyhydroxide and the anchor coat layer contains conductive particles.

Abstract: A method of making an electrolytic capacitor includes providing a first electrode that includes a metal substrate, a carbide layer, and a carbonaceous material. The metal substrate includes a metal selected from the group consisting of titanium, aluminum, tantalum, niobium, zirconium, silver, steel, and alloys and combinations thereof. The method further includes providing a second electrode and an electrolyte.

Abstract: Disclosed herein are a method for pre-doping an anode and a lithium ion capacitor storage device including the same. The method of the present invention includes: disposing lithium metal films and anodes alternately; and charging the lithium metal films and the anodes to directly pre-dope lithium metal contained in the lithium metal films onto the anodes. The lithium ion capacitor storage device is manufactured by the method. According to the present invention, the lithium ion capacitor storage device including the anode can provide a high-capacitance capacitor capable of operating even at a high voltage range of up to 3.8V to 2.0V, and ensure high reliability even in a high-temperature (60° C.) cycle.

Abstract: A both-side pressed terminal is connected as a first anode (cathode) lead tab terminal to an anode (a cathode) foil. A first connection surface of a connection portion of a one-side pressed terminal as a second anode (cathode) lead tab terminal is connected to an inner circumferential surface of the anode (cathode) foil. A position in a radial direction of a lead of the second anode (cathode) lead tab terminal is shifted inward to be in registration with a position in a radial direction of a lead of the first anode (cathode) lead tab terminal. Thus, an electrolytic capacitor free from position displacement of an anode (a cathode) lead tab terminal while maintaining characteristics as an electrolytic capacitor can be obtained.

Abstract: Methods of preparing an electrode are provided. A metal powder can be sintered onto a portion of a lead wire to form a connection region. An additional metal powder can be de-oxidation sintered onto the connection region to form the electrode. The oxides formed during the de-oxidation sintering are then removed from the electrode.

Abstract: The present invention relates to a magnesium capacitor including: a cathode including a carbon material as an active material; an anode including magnesium and its alloys as active materials; and an electrolyte. Since the magnesium capacitor in accordance with the present invention can use magnesium metal and its alloys as anode materials, a separate pre-doping process of magnesium metal is not needed. Further, it is possible to provide a magnesium capacitor that can be charged and discharged in a predetermined range as well as overcome reduction in stability due to leakage of an electrolyte occurred when using lithium ions as an anode material in the prior art.

Abstract: Particles of active electrode material are made by blending or mixing a mixture of activated carbon, optional conductive carbon, and binder. In selected implementations, the activated carbon particles have between about 70 and 98 percent microporous activated carbon particles and between about 2 and 30 percent mesaporous activated carbon particles by weight. Optionally, a small amount of conductive particles, such as conductive carbon particles may be used. In one implementation, the binder is inert. The electrode material may be attached to a current collector to obtain an electrode for use in various energy storage devices, including a double layer capacitor.

Abstract: Wet-tantalum capacitors used in a medical device are charged to and maintained at a maintenance voltage between full energy charges so that deformation in the wet-tantalum capacitor is substantially inhibited.

Abstract: A method of anodizing that is performed in the capacitor case. The anode and a formation cathode are inserted into the capacitor case. The formation cathode includes one or more passageways through which formation electrolyte is transferred to contact the surface of the anode. In one particular implementation, the anode includes several slots and the formation cathodes are plates that are inserted into the slots. One or more valves coupled to formation electrolyte storage tanks storing different electrolytes may be coupled to the formation cathode. A rinsing step can be performed by supplying water through the passageways in the formation cathode. Other implementations anodize outside the capacitor case.

Abstract: A bulk capacitor includes a first electrode formed of a metal foil and a semi-conductive porous ceramic body formed on the metal foil. A dielectric layer is formed on the porous ceramic body for example by oxidation. A conductive medium is deposited on the porous ceramic body filling the pores of the porous ceramic body and forming a second electrode. The capacitor can then be encapsulated with various layers and can include conventional electrical terminations. A method of manufacturing a bulk capacitor includes forming a conductive porous ceramic body on a first electrode formed of a metal foil, oxidizing to form a dielectric layer and filling the porous body with a conductive medium to form a second electrode. A thin semi-conductive ceramic layer can also be disposed between the metal foil and the porous ceramic body.

Abstract: An electrolytic capacitor that contains an anodically oxidized porous anode, cathode, and an electrolyte that contains an alkali metal salt and ionically conductive polymer is provided. The alkali metal salt forms a complex with the ionically conductive polymer and thereby improves its ionic conductivity, particularly at higher temperatures. The electrolyte also contains an organic solvent that reduces the viscosity of the electrolyte and helps lower the potential barrier to metal ion transport within the electrolyte to improve conductivity. By selectively controlling the relative amount of each of these components, the present inventors have discovered that a highly ionically conductive electrolyte may be formed that is also in the form of a viscous liquid. The liquid nature of the electrolyte enables it to more readily enter the pores of the anode via capillary forces and improve specific capacitance. Further, although a liquid, its viscous nature may inhibit the likelihood of leakage.

Abstract: A relatively thin planar anode for use in a wet electrolytic capacitor is provided. An anode leadwire is embedded within the anode and extends in a longitudinal direction therefrom. The wire may be formed from any electrically conductive material, such as tantalum, niobium, aluminum, hafnium, titanium, etc., as well as electrically conductive oxides and/or nitrides of thereof. To reduce the tendency of the leadwire to pull out of the anode due to stresses encountered during manufacturing (e.g., sintering) and/or use of the capacitor, the manner in which the wire is inserted is selectively controlled in the present invention. That is, at least a portion of the wire within the anode is bent at an angle relative to the longitudinal axis of the wire. This “bend” reduces the ease to which the wire can be pulled out in the longitudinal direction after the anode is pressed and sintered.

Abstract: A relatively thin planar anode for use in a wet electrolytic capacitor is provided. Through a combination of specific materials and processing techniques, the present inventors have surprisingly discovered that the resulting anode may possess a high volumetric efficiency, and yet still be able to operate at a high voltage and capacitance, thus resulting in a capacitor with a high energy density. More particularly, the anode is a pressed pellet formed from an electrically conductive powder that contains a plurality of particles (including agglomerates thereof). The particles may have a flake-like morphology in that they possess a relatively flat or platelet shape. The present inventors have discovered that such a particle morphology can optimize packing density, and thus reduce the thickness of the anode and improve volumetric efficiency.

Abstract: The storage cell includes a flat roll electrode that includes a strip of positive electrode having a positive electrode current collector foil and a positive electrode layer formed thereon, a strip of negative electrode having an electrode current collector foil and a negative electrode layer formed, and a strip of electrically insulated separator, the strip of positive electrode and the strip of negative electrode being wound into a flat roll configuration with the strip of electrically insulated separator sandwiched therebetween; a sealed casing that hermetically seals the flat roll electrode impregnated with an electrolyte; a positive terminal and a negative terminal each electrically insulated from the sealed casing, connected to the positive current collector foil and the negative current collector foil, respectively.

Abstract: Disclosed is a niobium suboxide powder for the manufacture of capacitors with higher break down voltages, higher temperatures of operation and elongated lifetimes. The powder is doped with nitrogen which is at least partly present in the form homogeneously distributed, x-ray detectable Nb2N-crystal domains. The niobium suboxide powder contains niobium suboxide particles having a bulk nitrogen content of between 500 to 20,000 ppm.

Abstract: A capacitor is presented that includes a housing, an electrode assembly, a liner, and a fill port. The liner is located between the housing and the electrode assembly. The liner includes a recessed portion. A fill port extends through the housing across from the recessed portion in the liner. A gap is formed between the recessed portion and the fill port.

Abstract: The present subject matter includes a first capacitor stack including a first plurality of anode layers and a first plurality of cathode layers and a second capacitor stack including a second plurality of anode layers and a second plurality of cathode layers. In various embodiments, a flexible bus is welded to the first capacitor stack and to the second capacitor stack. The flexible bus is adapted to conduct electricity between the first capacitor stack and the second capacitor stack. Also, the present subject matter includes embodiments where the first capacitor stack and the second capacitor stack are disposed in a case filled with an electrolyte.

Abstract: A wet electrolytic capacitor that contains a sintered anode positioned with an interior space of a metal casing is provided. The anode and metal casing are of a size such that the anode occupies a substantial portion of the volume of the interior space. More particularly, the anode typically occupies about 70 vol. % or more, in some embodiments about 75 vol. % or more, in some embodiments from about 80 vol. % to about 98 vol. %, and in some embodiments, from about 85 vol. % to 95 vol. % of the interior space. Among other things, the use of an anode that occupies such a large portion of the interior space enhances volumetric efficiency and other electrical properties of the resulting capacitor.

Abstract: One embodiment of the present subject matter includes a stack of substantially planar electrodes including at least a first and second anode layer, and a plurality of cathode layers, a case in which the stack is disposed and to which the plurality of cathode layers is connected, a first feedthrough disposed through the case and connected to the first anode and a second feedthrough disposed through the case and connected to the second anode, wherein a first capacitor including the first anode layer and a second capacitor including the second anode layer are electrically isolated.