Abstract: A negative electrode for an electrochemical capacitor includes a current collector having electric conductivity, and an electrode layer formed on a surface of the current collector and having cations stored therein. In at least a part of the electrode layer, a value of ratio Ia/Ib of peak value Ia indicating a presence of an anion decomposition compound and peak value Ib indicating a presence of an electrolyte in a spectrum of an atom forming the anion is 0.45 or more and less than 2.55 as measured using X-ray photoelectron spectroscopy.

Abstract: A multilayered graphene-based supercapacitor, including a generally planar separator with a plurality of graphene sheets on each side of the separator, wherein each of the graphene sheets on each side of the separator are separated by a layer of electrically conductive metallic adhesive or encapsulant.

Abstract: A package for an electrochemical double layer capacitor includes a housing defining an interior volume, the housing having an end wall, side walls, and an end cap configured to sealably engage with the side walls to enclose the interior volume, wherein the interior volume has a height (hcan) and a diameter (dcan) such that an aspect ratio defined as hcan/dcan is for an electrochemical double layer capacitor having a specific capacitance of at least 100 F. An electrode set adapted to be incorporated into the package can have an aspect ratio in a range of 3.1 to 15 and a specific capacitance of at least 100 F.

Abstract: The present disclosure provides an electrochemical device, which comprises a plurality of cells which are stacked in a step configuration, electrode tabs of the same polarity of the plurality of cells are electrically connected together. Compared with only using a single wound-type cell or only using a single laminated-type cell, the plurality of cells stacked in the step configuration of the present disclosure can more flexibly adapt to an irregular inner space of an electronic device using the electrochemical device, so that the inner space in the electronic device is fully used, the performance of the electrochemical device for use in the electronic device is improved, and the manufacturing process is more simple, flexible and efficient.

Abstract: When an electrode material having a weight-average mesopore/macropore specific surface area within a specific range is used, there arises an expansion of a cell caused by the generation of decomposed gas from a component of electrolyte solution during the pre-doping process of lithium ions. A potential drop upon the pre-doping process is adjusted so as to reduce or suppress the expansion of the cell. Specifically, since the pre-doping speed is increased, the negative electrode can speedily reach the potential by which an SEI component made of lithium alkyl carbonate can be produced on the surface of the negative electrode. Consequently, the absolute amount of the gas produced by the decomposition of the electrolyte solution can be reduced, whereby the expansion of the electric storage device can be reduced.

Abstract: The electrochemical cell of the present invention is provided with a hermetic container having a base member, a jointing material fixed to the base member, and a lid member welded on the base member via the jointing material, and in which a housing space sealed between the base member and the lid member is defined, and an electrochemical element which is housed inside the housing space and which is available to effect charging and discharging, wherein the lid member is made of stainless steel.

Abstract: An aluminum material, a dielectric layer and an interposing layer formed in at least one part of a region of the surface of the aluminum material between the aluminum material and the dielectric layer and includes aluminum and carbon, wherein the dielectric layer includes dielectric particles including a valve metal, and an organic substance layer formed on at least one part of a surface of the dielectric particle.

Abstract: A method of increasing the area of carbon nanotubes used in fabricating capacitors is described. The method involves reacting carbon nanotubes with electrically conductive ions, molecules or nanoparticles that increase the surface area of the nanotubes. The capacitance and the energy stored in the capacitor can be increased by such treatment. Devices constructed from such treated materials and their properties are described.

Abstract: A carbon-based electrode includes activated carbon, carbon black, and a binder. The binder is fluoropolymer having a molecular weight of at least 500,000 and a fluorine content of 40 to 70 wt. %. A method of forming the carbon-based electrode includes providing a binder-less conductive carbon-coated current collector, pre-treating the carbon coating with a sodium napthalenide-based solution, and depositing onto the treated carbon coating a slurry containing activated carbon, carbon black and binder.

Abstract: A positive electrode for an energy storage device includes a first activated carbon material comprising pores having a size of ?1 nm, which provide a combined pore volume of >0.3 cm3/g, pores having a size of >1 nm to ?2 nm, which provide a combined pore volume of ?0.05 cm3/g, and <0.15 cm3/g combined pore volume of any pores having a size of >2 nm. A negative electrode for the energy storage device includes a second activated carbon material comprising pores having a size of ?1 nm, which provide a combined pore volume of ?0.3 cm3/g, pores having a size of >1 nm to ?2 nm, which provide a combined pore volume of ?0.05 cm3/g, and <0.15 cm3/g combined pore volume of any pores having a size of >2 nm. The total oxygen content in at least the first activated carbon material is at most 1.5 wt. %.

Abstract: A method of forming a carbon-based electrode includes forming a mixture of activated carbon particles, carbon black particles, binder, and an optional liquid, fibrillating the binder to form a fibrillated mixture, and forming a carbon mat from the fibrillated mixture, wherein the mixture, during the forming of the mixture, is maintained at a temperature less than 19° C. The low temperature process facilitates dispersive and distributive mixing of the components of the carbon mat.

Abstract: A supercapacitor includes a pair of electrodes and an electrolyte. Each electrode has a graphite fiber core, and an activated carbon shell atomically coated on an outer surface of the core. The electrolyte is mounted between the two electrodes and in touch with each shell for electrical connection of the two electrodes.

Abstract: The present application is directed to electric double layer capacitance (EDLC) devices. In one aspect, the present application is directed to an electrode comprising an activated carbon cryogel having a tunable pore structure wherein: the surface area is at least 1500 m2/g as determined by nitrogen sorption at 77K and BET analysis; and the pore structure comprises a pore volume ranging from about 0.01 cc/g to about 0.25 cc/g for pores having a pore diameter of 0.6 to 1.0 nm. In another aspect, the present application is directed to an Electric Double Layer Capacitor (EDLC) device comprising an activated cryogel.

Abstract: An electrical double layer capacitor (EDLC) energy storage device is provided that includes an electrolyte having an anionic catholyte and a cationic anolyte, a positively charged electrode, and a negative charged electrode, where negatively charged oxidized species in the anionic catholyte are electrostatically attracted to the positively charged electrode, where positively charged reduced species in the cationic anolyte are electrostatically attracted to the negatively charged electrode, where self-discharge of the EDLC energy storage device is prevented.

Abstract: The present invention discloses a new construction of ultracapacitor utilizing particles of transition metal nitride having negligible amount of halide impurities. The construction is expected to attain high specific energy density by using transition metal nitride particles and higher reliability by avoiding potential corrosion of metal components with halide impurities. The transition metal nitride particles are preferably synthesized by basic ammonothermal process, which utilizes supercritical ammonia with alkali metal mineralizers. Transition metal nitride such as vanadium nitride, molybdenum nitride, titanium nitride, nickel nitride, neodymium nitride, iron nitride, etc. can be synthesized in supercritical ammonia with reducing mineralizers such as potassium, sodium, lithium, magnesium, calcium, and aluminum. Since supercritical ammonia has characteristics of both gas and liquid, it can over complicated fine structure or fine particles.

Abstract: Carbon-based electrodes such as for incorporation into ultracapacitors or other high power density energy storage devices, include activated carbon, carbon black, binder and at least one molecular sieve material. The molecular sieve component can adsorb and trap water, which can facilitate the use of the device at higher voltage, such as greater than 3V. The molecular sieve material may be incorporated into the carbon-based electrodes or formed as a layer over a carbon-based electrode surface.

Abstract: A separator such as for an electrochemical double layer capacitor includes acicular inorganic particles that are dried to form a porous membrane. Example inorganic particles are calcium silicate particles. A deposition method implementing slurry that includes the acicular inorganic particles and a dispersing medium along with a binder material can be used to form the separator layer directly on electrode materials.

Abstract: An electric double layer capacitor with a low resistance value is disclosed. The electric double layer capacitor includes an electrochemical device in the inside of a housing container and capable of achieving charge and discharge via external terminals, wherein the electrochemical device includes a pair of electrodes, a separator disposed between the pair of electrodes, and an electrolytic solution with which the pair of electrodes and the separator are impregnated; when a volume between the pair of electrodes is designated as Ve, and a volume of a void in an inter-electrode part of the separator disposed between the pair of electrodes is designated as Se, an inter-electrode part void ratio Re is defined as Re=Se/Ve×100 (%); and when a thickness of the inter-electrode part is designated as L2 (?m), and a separator evaluation index Ie is defined as Ie=L2/Re (?m/%), a relation of Ie?1.0 (?m/%) is satisfied.

Abstract: An activated carbon for an electrode of a power storage device of the present invention has uniform consecutive macropores, and a pore size distribution centered within a range of 1.5 to 25 ?m, a specific surface area within a range of 1,500 to 2,300 m2/g, a micropore volume within a range of 0.4 to 1.0 mL/g, and an average micropore width within a range of 0.7 to 1.2 nm. Provided is an activated carbon for an electrode of a power storage device suitable for an electric double layer capacitor that has high capacitance during charging and discharging at high current density and excellent endurance against charging at a high voltage of 3 V or more and a lithium-ion capacitor having excellent endurance against charging at a high voltage of 4 V or more.

Abstract: An electric double-layer capacitor (EDLC) and method for manufacturing thereof. The ELDC includes at least one capacitor cell with two parallel current collectors, two opposite polarity electrodes, a separator, a rigid dielectric frame, and at least one evacuation mechanism. Each electrode is disposed on a respective current collector, and impregnated with aqueous electrolyte. The frame is disposed along the perimeter on the surface of a current collector and enclosing the electrodes. The evacuation mechanism removes superfluous fluid material from the capacitor cell interior. The evacuation mechanism may be a compartment in the frame, operative to collect residual electrolyte that seeps out from the electrodes, or a capillary formed within the frame and extending into a portion of the electrode, the capillary composed of a porous hydrophobic material and operative to evacuate discharged gases from the electrodes out of the EDLC.

Abstract: The present invention provides an electrode for an electric double layer capacitor comprising high energy density, low degradation of electrostatic capacitance and resistance with passage of time even using under high voltage, i.e., excellent long-term reliability. The electrode for the electric double layer capacitor comprises polarizing electrode materials containing porous carbon particles, an auxiliary conducting agent, tungsten oxide powders, and binders; conductive adhesive containing a conductive material and a poly-N-vinylacetamide (PNVA)-based binder; and a sheet current collector.

Abstract: The present invention provides a highly conductive, highly voltage-resistant, and stable liquid electrolyte solution for capacitors which does not coagulate and is free from precipitation of salts in a wide temperature range, particularly at low temperatures, shows excellent electrical characteristics, and has excellent long-term reliability. The present invention also provides an electric double-layer capacitor and a lithium ion capacitor produced using the electrolyte solution for capacitors. The present invention relates to an electrolyte solution for capacitors including: an organic solvent; and a quaternary ammonium salt or lithium salt dissolved in the organic solvent, the organic solvent containing acetonitrile and a chain alkyl sulfonic compound represented by the formula (1): wherein R1 and R2, which may be the same as or different from each other, each independently represent a straight or branched chain C1-C4 alkyl group.

Abstract: The invention relates to a current collector foil for batteries, accumulators or capacitors, comprising a carrier material and at least one electrically conductive layer made from a metal. Moreover, the invention relates to a method for producing a corresponding current collector foil as well as to the advantageous use thereof. The object of providing a current collector foil for batteries, accumulators or capacitors, which is optimised in relation to the contact surface and the adhesive properties and which results in an improved service life, is achieved as a result of the fact that the at least one electrically conductive layer is produced at least partially by electrodepositing a metal and has a texture.

Abstract: An energy storage device includes a middle section (610) including a plurality of double-sided porous structures (500), each of which contain multiple channels (511) in two opposing surfaces (515, 525) thereof, an upper section (620) comprising a single-sided porous structure (621) containing multiple channels (622) in a surface (625) thereof, and a lower section (630) including a single-sided porous structure (631) containing multiple channels (632) in a surface (635) thereof.

Abstract: An electrical cell apparatus includes a first current collector made of a multiplicity of fibers, a second current collector spaced from the first current collector; and a separator disposed between the first current collector and the second current collector. The fibers are contained in a foam.

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 storage body comprises an electric energy storage unit and a case that houses the storage unit. The case comprises a frame-shaped outer shell body having two end surfaces that respectively include opening portions and a pair of laminate film pieces that are adhered to the respective end surfaces of the outer shell body so as to form a storage chamber inside the outer shell body. Each laminate film piece comprises an adhesion portion that is adhered to the outer shell body and a film portion that faces the storage chamber. The laminate film pieces, which are not formed by press-molding, are adhered to the outer shell body, and therefore structurally weak sites are not formed on the laminate film pieces.

Abstract: Disclosed is a flexible ultracapacitor having a flexible cloth including an autotransformer-type connected switch made with nanoporous carbon electrodes impregnated by an electrolyte. Each of the nanoporous carbon electrodes may be configured to have a circuit. The circuit may include a first inductor and a second inductor. Each of the first inductor and the second inductor may have a first terminal and a second terminal. The second terminal of the first inductor may be coupled to the first terminal of the second inductor. A switch may be coupled between the first terminal of the first inductor and the second terminal of the second inductor.

Abstract: The invention concerns an electrical energy storage assembly (capacitor or battery) comprising: -an envelope (20) including: *at least one lateral wall (21), and *an open end, -an electrochemical element (30) intended to be contained in the envelope (20) and -at least one cover (40) intended to be positioned at the open end of the envelope (20), each cover (40) including: *a cover wall (41, 45) intended to cover the open end of the envelope (20), *a lateral face (42, 43) at the periphery of the cover wall (41, 45) and intended to be facing the lateral wall (21) of the envelope (20), -at least one electrically insulating elastic annular ring (50) intended to be positioned between the lateral wall (21) of the envelope (20) and the lateral wall (42, 43) of the cover (40).

Abstract: The present invention relates to, inter alia, gyroidal mesoporous carbon materials and methods of use and manufacture thereof. In one embodiment, the present invention relates to a mesoporous carbon composition comprising a gyroidal mesoporous carbon having an ordered gyroidal structure and mesopores having a pore size of greater than 2 nanometers (nm) in diameter, and more particularly greater than 11 nm in diameter.

Abstract: The present invention, in part, relates to a carbon black having a) a nitrogen BET surface area (BET) of from about 600 m2/g to about 2100 m2/g, b) a CDBP value in mL/100 g of from about (?2.8+(b*BET)) to about (108+(b*BET)), where b is 0.087 and BET is expressed in m2/g, and c) an apparent density (p, g/cm3) of at least about 0.820+q*BET, where q=?2.5×10?4, as determined at a compressive force (P) of 200 kgf/cm2 on dry carbon black powder. Energy storage devices, such as electrochemical double layer capacitors (EDLC's), containing the carbon black are also disclosed. Methods for making the carbon blacks and EDLC's made with them are also provided.

Abstract: One embodiment includes a rechargeable charge storage device including a microcapsule disposed within said rechargeable charge storage device; and a thermal retardant chemical species contained within said microcapsule, wherein said microcapsule is adapted to release said chemical species upon being exposed to a triggering event either prior to or during an unstable rise in temperature of said charge storage device.

Abstract: One of the objects of the present invention is to provide a separator for an electrochemical device, capable of suppressing an increase in a resistance value of a storage element. In accordance with one aspect of the present invention, a separator 16c for an electrochemical device is formed such that plural high porosity portions 16c1 from an upper surface to a lower surface in a thickness direction thereof and plural low porosity portions 16c2 from the upper surface to the lower surface in the thickness direction thereof are arranged in a region which is interposed between a positive electrode 16a and a negative electrode 16b.

Abstract: The present invention relates to a lithium ion capacitor having excellent capacitance characteristics and high energy density. More particularly, the present invention relates to a cathode active material for a lithium ion capacitor, which utilizes a lithium composite metal oxide having a large initial irreversible capacitance as a specific cathode additive in addition to a carbon-based material applied as a cathode active material, and a production method thereof, and a lithium ion capacitor including the same. According to the present invention, lithium can be electrochemically doped on an anode without using metal lithium, and the capacitance characteristics of a lithium ion capacitor and the safety of a lithium-doping process can be significantly improved.

Abstract: Embodiments of the disclosure set forth energy storage devices. Some example energy storage devices include a first hybrid capacitor, a first battery and an electric double-layer capacitor. The first hybrid capacitor includes a first positive electrode, a first negative electrode and a first electrolyte. The first battery couples to the first hybrid capacitor and includes a second positive electrode, a second negative electrode and a second electrolyte. The electric double-layer capacitor couples to the first battery and includes a third positive electrode, a third negative electrode and a third electrolyte. The first positive electrode includes the second positive electrode.

Abstract: Disclosed is a super capacitor and method of manufacture thereof. This invention relates to a solid state super capacitor comprising a solid state polymer electrolyte and a modified carbonaceous electrode. Said modified carbonaceous electrode comprises a conductive carbonaceous material covered with active ingredients. Said modified carbonaceous electrode and said solid state polymer electrolyte are layered on top of each other to form a sandwich-like structure. Said super capacitor performs much better than known super capacitor comprising liquid or gel-form electrolytes. Said super capacitor has higher conductivity, therefore can be manufactured without a current collector. Since said super capacitor contains solid state polymer electrolyte, the method of manufacturing said super capacitor is more environmentally friendly and has a higher safety level.

Abstract: Technologies are generally described for electrochemical capacitor devices. Some example electrochemical capacitor devices may include a composite electrode that includes an electrode substrate coupled to a polymeric electrochemical layer. The polymeric electrochemical layer may include: a conductive polymer electrically coupled to the electrode substrate; a solid state, ionically conductive electrolyte polymer; and non-conducting cross-links that covalently link the conductive polymer and the electrolyte polymer. Various example electrochemical capacitor devices may be constructed by laminating two of the composite electrodes against opposing sides of an ionically conducting separator membrane, and contacting the composite electrodes and the separator membrane with a liquid electrolyte. Some example electrochemical capacitor devices may display favorable performance such as symmetric charge storage, non-Faradic charge storage, and/or similar or greater capacity compared to carbon based systems.

Abstract: A spacer-modified nano graphene platelet electrode, comprising: (a) multiple nano graphene platelets or sheets having an average thickness smaller than 10 nm; and (b) discrete, non-metallic nano-scaled particles that are disposed between two graphene platelets or sheets to serve as a spacer. In such a spacer-modified graphene electrode, large amounts of electrolyte-accessible pores are formed, enabling the formation of large amounts of electric double layer charges in a supercapacitor, which exhibits an exceptionally high specific capacitance.

Abstract: A supercapacitor including at least one first electrode substrate having a surface coated with an active material, and at least one second electrode substrate having a surface coated with the active material, wherein the at least one first electrode substrate has a polarity reverse to that of the at least one second electrode substrate. The at least one first and second electrode substrates are stacked in an alternating arrangement. A plurality of the first electrode substrate having the same polarity or a plurality of the second electrode substrate having the same polarity is connected in parallel. The at least one first and second electrode substrates include stacking portions each having opposite surfaces arranged with a frame-shaped insulating ring. An electrolyte is accommodated in spaces enclosed by the opposite surfaces of each stacking portion of the at least one first and second electrode substrates and each insulating ring.

Abstract: The present invention relates to an aerogel based on doped graphene, a method for producing said aerogel and the use of said aerogel, for example, as an electrode or a catalyst. Furthermore, the present invention relates to electrodes, all solid-state supercapacitors (ASSS) or catalysts based on said aerogel. The present invention also relates to doped graphene, which can be obtained as an intermediate in the production of the aerogel based on doped graphene using graphene oxide as starting material.

Abstract: Composite particles for an electrochemical device electrode including an electrode active material and a binding agent and having surfaces thereof coated with an external additive A, wherein at least one kind of the external additive A has a powder resistance of less than 10 ?·cm, and, in the case where three axial diameters of the external additive A are a length diameter LA, a thickness tA, and a width bA, the length diameter LA is 0.1 to 5 ?m and a ratio (bA/tA) between the width bA and the thickness tA is 5 or more and less than 50.

Abstract: The invention relates to the use of lithium-2-pentafluoroethoxy-1,1,2,2-tetrafluoro-ethanesulfonate as a conductive salt in lithium-based energy stores and to electrolytes containing lithium-2-pentafluoroethoxy-1,1,2,2-tetrafluoro-ethanesulfonate.

Abstract: An electrolytic solution for electric double layer capacitors includes an organic solvent and quaternary ammonium salt dissolved in the organic solvent. The organic solvent consists of sulfolane and chain sulfone. The quaternary ammonium salt is at least one of diethyl dimethyl ammonium salt and ethyl trimethyl ammonium salt.

Abstract: The invention relates to a separator for non-aqueous-type electrochemical device that has been coated with an aqueous fluoropolymer coating. The fluoropolymer is preferably polyvinylidene fluoride (PVDF), and more preferably a copolymer of polyvinylidene fluoride. The fluoropolymer coating provides a porous coating on porous substrate separator used in non-aqueous-type electrochemical devices, such as batteries and electric double layer capacitors. The fluoropolymer coating improves the thermal resistance and mechanical integrity, and lowers the interfacial electrical impedance of the porous separator. The fluoropolymer composition optionally contains powdery particles that are held together on the separator by the fluoropolymer binder. In one embodiment, the starting fluoropolymer dispersion is free of fluorinated surfactant. In another embodiment, one or more fugitive adhesion promoters are added.

Abstract: In some embodiments, an apparatus includes a housing and a purge valve. The housing defines a cavity and a lumen extending from a volume of the cavity to a volume outside the cavity. The purge valve is disposed within the lumen and includes an occlusion member. A portion of the occlusion member has a width substantially equal to a width of an end portion of the lumen such that the portion of the occlusion member is disposed within the end portion of the lumen when the purge valve is in a first configuration. The portion of the occlusion member being disposed outside the end portion of the lumen when the purge valve is in a second configuration.

Abstract: An energy storage device comprises a capacitor having a dielectric between opposite electrodes and a nonconductive coating between at least one electrode and the dielectric. The nonconductive coating allows for much higher voltages to be employed than in traditional EDLCs, which significantly increases energy stored in the capacitor. Viscosity of the dielectric material may be increased or decreased in a controlled manner, such as in response to an applied external stimulus, to control discharge and storage for extended periods of time.

Abstract: An electric storage device includes a case, an electrode assembly housed in the case and including a positive electrode plate and a negative electrode plate which are wound together while being isolated from each other, an external terminal arranged outside the case and a current collecting member arranged inside the case to electrically connect the electrode assembly with the external terminal. The current collecting member includes a first portion including a first end portion and a second end portion, and electrically connected to the external terminal, and a second portion extending out of the second end portion of the first portion and electrically connected to the electrode assembly. The second portion includes a base portion including a first end portion and a second end portion, the first end portion of the base portion being connected to the second end portion of the first portion, and a twisted portion.

Abstract: The invention relates to a cover for covering a tubular element of a first electrical energy storage assembly (20), said cover comprising a covering wall (50). The cover is characterised in that it comprises a radially extending electroconductive tongue (60, 70) comprising a contact face (71) intended to come into contact with a second adjacent storage assembly in order to electrically connect the two storage assemblies.

Abstract: The invention relates to a module comprising at least two electrical energy storage assemblies (20), each storage assembly comprising: a tubular element (21) comprising a so-called side face (23), and at least one cover (50) for covering one of the ends of the tubular element. Said module is characterised in that it also comprises a connecting body (60) for electrically connecting the two assemblies, the connecting body comprising at least one portion, each portion being separate from at least one of the storage assemblies (20), and the connecting body extends between the two storage assemblies such that the height of each storage assembly connected to the connecting body is equal to the height of a storage assembly that does not have a connecting body.

Abstract: The present invention relates to an electrolyte having improved high-rate charge and discharge property, and a capacitor comprising the same, and more particularly to an electrolyte having improved high-rate charge and discharge property comprising an aromatic compound, which comprises at least one compound of the following Chemical Formula 1 to Chemical Formula 11 that can induce resonance effect of electron movement, and which is a substituted organic compound in which a functional group is present at a location that can structurally prevent local polarization effect, and the boiling point of which is 80° C. or higher, wherein R in the Chemical Formula 1 to Chemical Formula 11 is at least one functional group selected from the alkyl group consisting of methyl, ethyl, propyl and butyl, and a capacitor comprising the same.