Entries |
Document | Title | Date |
20080232029 | Neutral electrolyte for a wet electrolytic capacitor - A working electrolyte for use in a wet electrolytic capacitor is provided. The electrolyte is relatively neutral and has a pH of from about 5.0 to about 8.0, in some embodiments from about 5.5 to about 7.5, and in some embodiments, from about 6.0 to about 7.5. Despite possessing a neutral pH level, the electrolyte is nevertheless electrically conductive. For instance, the electrolyte may have an electrical conductivity of about 10 milliSiemens per centimeter (“mS/cm”) or more, in some embodiments about 30 mS/cm or more, and in some embodiments, from about 40 mS/cm to about 100 mS/cm, determined at a temperature of 25° C. | 09-25-2008 |
20080232030 | Wet electrolytic capacitor containing a plurality of thin powder-formed anodes - A wet electrolytic capacitor that includes a plurality of anodes, cathode, and working electrolyte that is disposed in electrical contact with the anodes and current collector is provided. Any number of anodes may generally be employed, such as from 2 to 40, in some embodiments from 3 to 30, and in some embodiments, from 4 to 20. The anodes are thin and typically have a thickness of about 1500 micrometers or less, in some embodiments about 1000 micrometers or less, and in some embodiments, from about 50 to about 500 micrometers. By employing a plurality of anodes that are relatively thin in nature, the resulting wet electrolytic capacitor is able to achieve excellent electrical properties. For example, the equivalent series resistance (“ESR”)—the extent that the capacitor acts like a resistor when charging and discharging in an electronic circuit—may be less than about 1500 milliohms, in some embodiments less than about 1000 milliohms, and in some embodiments, less than about 500 milliohms, measured with a 2-volt bias and 1-volt signal at a frequency of 1000 Hz. | 09-25-2008 |
20080310079 | Electrolytic Capacitor Comprising Means for the Sorption of Harmful Substances - An electrolytic capacitor is provided having an airtight casing, electrodes immersed in an electrolytic solution, electrical contacts connected to the electrodes, and a means ( | 12-18-2008 |
20080316678 | Nanoparticle ultracapacitor - Particular aspects provide capacitors, and particularly ultracapacitors, comprising molecules suitable to substantially increasing the capacitance of the capacitor, and methods for making same Particular aspects provide ultracapacitors that include nanoparticles optionally coated with molecules, such as polymer electrolytes. Certain aspects provide an energy storage device or capacitor, comprising at least three layers sealed in a fluid-tight covering, wherein a first layer comprises at least one electrolytic polymer molecule of positive charge and at least one nanoparticle; a second dielectric layer comprising at least one insulative polymer; a third layer comprising at least one electrolytic polymer molecule of negative charge and at least one nanoparticle. In certain aspects, the electrolytic polymer of the first layer comprises at least one high charge density polymer electrolyte of positive charge, and wherein the electrolytic polymer of the third layer comprises at least one high charge density polymer electrolyte of negative charge. | 12-25-2008 |
20090027830 | Non-Aqueous Capacitor and Method for Manufacturing the Same - This invention provides a non-aqueous capacitor having high voltage resistance, energy density and power density, which comprises an electrode unit composed of collectors, electrodes and separators, and an electrolytic solution, which are contained and sealed in a case, in which each of the collectors, electrodes and separators is made of the materials having a melting point or pyrolysis-initiating temperature (where melting point is not expressed) not lower than 280° C., and the electrode unit is dried after its assembling, at a temperature not lower than the lowest of the melting points or pyrolysis-initiating temperatures of the materials constituting the electrode unit, by 100° C. | 01-29-2009 |
20090046412 | Electric double layer capacitor - An electric double layer capacitor has a structure with little deformation of a cap or the like due to increase in internal pressure. The electric double layer capacitor includes: a stacked body made of a stacked plurality of thin electrode plates and thin insulating plates each being inserted between each adjacent electrode plate and insulating therebetween; a container storing the stacked body; electrolytic solution filling the container; a flexible cap which covers the container with a space prepared at the end of the container along the laminating length; two inserting through-holes which are formed in the cap and allow positive and negative lead terminals connected to the electrode plates to pass through; and reinforcing parts provided on respective edges of the inserting through-holes. | 02-19-2009 |
20090052117 | Carbonized Biopolymers and Carbonization Process - A carbon material suitable for the preparation of electrodes for electrochemical capacitors is obtained by single-stage carbonization of biopolymers with a large content of heteroatoms. Neither addition of an activating agent during carbonization nor subsequent gas phase activation is necessary. Several biopolymers which are available by extraction from seaweed are suitable precursors. Alternatively, the seaweed containing such biopolymers is carbonized directly. | 02-26-2009 |
20090059474 | Graphite-Carbon composite electrode for supercapacitors - A composite composition for use in an electrode for electrochemical capacitors, comprising: (a) an electrochemically active material; and (b) exfoliated graphite flakes that are substantially interconnected to form a porous, conductive graphite network comprising pores, wherein at least a portion of the active material resides in a pore of the network. The composite composition is characterized by having liquid accessible pores which provide a surface area greater than about 200 m | 03-05-2009 |
20090116170 | Electrochemical capacitor with carbon nanotubes - An electrolytic capacitor includes a first electrode, a second electrode opposite to the first electrode, a separator sandwiched between the first electrode and the second electrode, a cell accommodating the first electrode, the second electrode and the separator, and an electrolytic solution filled into the inner space of the cell, with the first electrode, the second electrode and the separator immersed into the electrolytic solution. The first electrode and second electrode are in a CNT film structure, wherein the CNT film includes a number of CNTs packed closely, entangled and interconnected with each other, and disorderly arranged. The electrolytic capacitor is a high-performance capacitor. | 05-07-2009 |
20090116171 | Electrochemical capacitor with carbon nanotubes - An electrolytic capacitor includes a first electrode, a second electrode opposite to the first electrode, a separator sandwiched between the first electrode and the second electrode, a cell accommodating the first electrode, the second electrode and the separator, and an electrolytic solution filled into the inner space of the cell, with the first electrode, the second electrode and the separator immersed into the electrolytic solution. The first electrode and second electrode are in a CNT film structure, wherein the CNT film includes a number of CNTs packed closely, substantially parallel to a surface of the CNT film, and isotropically arranged along a fixed direction or along random directions. The electrolytic capacitor is a high-performance capacitor. | 05-07-2009 |
20090135549 | LITHIUM ION CAPACITOR - A lithium ion capacitor includes a positive electrode including a positive electrode active material capable of reversibly doping either one or both of a lithium ion and an anion, a negative electrode including a negative electrode active material capable of reversibly doping a lithium ion, and a non-protonic organic solvent electrolytic solution of a lithium salt as an electrolytic solution. The lithium ion is doped to either one or both of the negative electrode and positive electrode so that the positive electrode potential after the positive electrode and negative electrode are short-circuited is 2.0 V or less. A surface of the negative electrode is covered with a polymer. | 05-28-2009 |
20090168302 | Electrochemical capacitor with carbon nanotubes - An electrolytic capacitor includes a first electrode, a second electrode opposite to the first electrode, a separator sandwiched between the first electrode and the second electrode, a cell accommodating the first electrode, the second electrode and the separator, and an electrolytic solution filled into the inner space of the cell, with the first electrode, the second electrode and the separator immersed into the electrolytic solution. The first electrode and second electrode are in a CNT film structure, and the CNT film structure includes a number of CNT films stacked and packed closely by van der Waals attractive force. Each CNT film includes a number of aligned CNTs, and an angle between the aligned directions of CNTs of any two adjacent CNT film is in an approximate range from 0 to 90 degrees. The electrolytic capacitor is a high-performance capacitor. | 07-02-2009 |
20100085684 | Material and device properties modification by electrochemical charge injection in the absence of contacting electrolyte for either local spatial or final states - In some embodiments, the present invention is directed to processes for the combination of injecting charge in a material electrochemically via non-faradaic (double-layer) charging, and retaining this charge and associated desirable properties changes when the electrolyte is removed. The present invention is also directed to compositions and applications using material property changes that are induced electrochemically by double-layer charging and retained during subsequent electrolyte removal. In some embodiments, the present invention provides reversible processes for electrochemically injecting charge into material that is not in direct contact with an electrolyte. Additionally, in some embodiments, the present invention is directed to devices and other material applications that use properties changes resulting from reversible electrochemical charge injection in the absence of an electrolyte. | 04-08-2010 |
20110058308 | Metal Encapsulated Dendritic Carbon Nanostructure, Carbon Nanostructure, Process for Producing Metal Encapsulated Dendritic Carbon Nanostructure, Process for Producing Carbon Nanostructure, and Capacitor - This invention provides a metal encapsulated dendritic carbon nanostructure comprising a dendritic carbon nanostructure comprising a branched carbon-containing rod-shaped or annular material and a metallic body capsulated in the carbon nanostructure. There is also provided a dendritic carbon nanostructure comprising a branched carbon-containing rod-shaped or annular material. | 03-10-2011 |
20110058309 | ELECTRODE FILM CONTAINING IONIC LIQUID, ELECTRODE, THEIR PRODUCTION METHODS, AND ELECTRIC ENERGY STORAGE DEVICE - The electrode film of the present invention includes electrode material particles having an average particle diameter of Da, solid particles having an average particle diameter of Db, and an ionic liquid, wherein Da and Db satisfy a formula Db/Da≦1.0×10 | 03-10-2011 |
20110075323 | CAPACITOR - A capacitor having stable characteristics and an improved energy density while sufficiently ensuring a bonding strength between the polarizable electrode layer and the current collector is provided. A buffer layer including a ratio of 60 wt % to 90 wt %, preferably 70 wt % to 80 wt %, of carbon nanofiber or carbon nanotube, is formed over the current collector. Then, by forming a polarizable electrode layer over the aforesaid buffer layer, a pair of electrodes are obtained in which, the buffer layer and the polarizable electrode layer are stacked in this order over the current collector. Additionally, a capacitor is formed with the above-mentioned pair of electrodes by opposing the polarizable electrode layers to each other so as to be facing one another with a separator sandwiched therebetween in an electrolyte solution. | 03-31-2011 |
20110075324 | SUPERCAPACITORS WITH BLOCK COPOLYMER ELECTROLYTES - 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. | 03-31-2011 |
20110149474 | SYSTEMS AND METHODS TO CONNECT SINTERED ALUMINUM ELECTRODES OF AN ENERGY STORAGE DEVICE - This document provides an apparatus including a sintered electrode, a second electrode and a separator material arranged in a capacitive stack. A conductive interconnect couples the sintered electrode and the second electrode. Embodiments include a clip interconnect. In some embodiments, the interconnect includes a comb-shaped connector. In some embodiments, the interconnect includes a wire snaked between adjacent sintered substrates. | 06-23-2011 |
20110188172 | HIGH ENERGY DENSITY STORAGE MATERIAL DEVICE USING NANOCHANNEL STRUCTURE - A capacitor includes a plurality of nanochannels formed in a dielectric material. A conductive film is formed over interior surfaces of the nanochannels, and a charge barrier is formed over the conductive film. An electrolytic solution is disposed in the nanochannels. An electrode is coupled to the electrolytic solution in the nanochannels to form the capacitor. | 08-04-2011 |
20120075771 | COIN TYPE LITHIUM ION CAPACITOR - Disclosed is a coin type lithium ion capacitor which includes a positive electrode made of an activated carbon based positive active material and a negative electrode opposite to the positive electrode with a first separator interposed therebetween. The negative electrode includes a graphite electrode including a first current collector and a graphite based negative active material coated onto the first current collector; and a lithium metal member opposite to the graphite electrode with a second separator interposed therebetween and including a second current collector and lithium metal coated on the second current collector, in which lithium ions of the lithium metal move from the lithium metal to the positive electrode through the graphite electrode during discharge and are carried in the graphite electrode from the positive electrode during charge. | 03-29-2012 |
20120106028 | Form factored and flexible ultracapcitors - Advanced ultracapacitor construction of irregular shape is provided, having higher utilization of the available energy storage shape in various electronic and electromechanical products over the prior art ultracapacitors. Said irregular shape of ultracapacitor is achieved by using flexible and pliable cell materials in layers, blanked into any desired shape, and stacked. The layers may be also bent to follow any contour. More capacity in given irregular volume is thus accomplished. | 05-03-2012 |
20120120552 | ELECTROCHEMICAL CAPACITOR - An electrochemical capacitor capable of improving discharge characteristics is provided. A cathode and an anode are laminated with a separator in between. The cathode includes a cathode active material layer on one surface of a cathode current collector, and the anode includes an anode active material layer on one surface of an anode current collector. Both of the cathode active material layer and the anode active material layer include both of an ionic liquid and a polymer compound together with the active materials. Since the ionic liquid is retained by the polymer compound in the cathode and the anode, discharge capacity is less likely to be reduced. | 05-17-2012 |
20120162859 | ELECTROLYTIC CAPACITOR AND METHOD FOR MANUFACTURING THE SAME - According to one embodiment, an electrolytic capacitor includes a first electrode foil, a second electrode foil and an insulating member. The first electrode foil is formed like a loop and configured in such a manner that a first terminal is connected to a predetermined position. The second electrode foil is formed like a loop in such a manner that an outer periphery of the second electrode foil lies opposite an inner periphery of the first electrode foil. An insulating member is formed like a loop interposed between the inner periphery of the first electrode foil and the outer periphery of the second electrode foil. | 06-28-2012 |
20130010401 | THREE-DIMENSIONAL NETWORK ALUMINUM POROUS BODY, ELECTRODE USING THE ALUMINUM POROUS BODY, AND NONAQUEOUS ELECTROLYTE BATTERY, CAPACITOR USING NONAQUEOUS ELECTROLYTIC SOLUTION AND LITHIUM-ION CAPACITOR USING NONAQUEOUS ELECTROLYTIC SOLUTION, EACH USING THE ELECTRODE - A three-dimensional network aluminum porous body in which the amount of aluminum forming a skeleton of the three-dimensional network aluminum porous body is uneven in the thickness direction, and a current collector and an electrode each using the aluminum porous body, and a manufacturing method thereof. In such a sheet-shaped three-dimensional network aluminum porous body for a current collector, the amount of aluminum forming a skeleton of the three-dimensional network aluminum porous body is uneven in the thickness direction. For example, in the case where a cross section in the thickness direction of the three-dimensional network aluminum porous body is divided into three regions of a region | 01-10-2013 |
20130083454 | CAPACITORS AND METHOD FOR MANUFACTURING THE SAME - A capacitor and a manufacturing method thereof with improved capacitance density, simplified production process, and/or improved high frequency characteristic without having to form a nano-scale pattern are provided. A capacitor element | 04-04-2013 |
20130120909 | LITHIUM ION CAPACITOR - An object of the present invention is to provide a way to reduce the internal resistance of a lithium ion capacitor without causing its capacity or withstand voltage to drop. The present invention provides a lithium ion capacitor having a positive electrode, a negative electrode, a separator, and an electrolyte solution, wherein the separator contains cellulose that has been given a treatment to create carbon-carbon double bonds. | 05-16-2013 |
20130128414 | SEALING MEMBER FOR A CAPACITOR AND METHOD FOR MANUFACTURING A CAPACITOR - A sealing member for a capacitor is formed of an elastic material, and has a circular cylindrical shape extending along an axial direction. The sectional view perpendicular to the axial direction shows a circular shape. Further, a pair of through-holes is formed parallel to the axial direction. The shape of each through-hole in the sectional view perpendicular to the axial direction of the sealing member is composed of a first arc and a second arc. The first arc protrudes toward the circumference of the sealing member. The second arc protrudes toward the center of the sealing member and has a curvature smaller than that of the first arc. | 05-23-2013 |
20130141840 | ON-BOARD POWER SUPPLY - A power supply for a device disposed on a substrate is provided. An electrolytic double layer capacitor disposed in a circuit to provide power to circuit components is described. Aspects of fabrication are provided. | 06-06-2013 |
20130342965 | CARBON NANOSTRUCTURE, CAPACITOR, METHOD FOR PROCESSING CARBON NANOSTRUCTURE, AND METHOD FOR PRODUCING CARBON NANOSTRUCTURE - A carbon nanostructure's geometry and electrical characteristics can be controlled. A method for processing a carbon nanostructure according to the present invention includes the steps of: preparing a carbon nanostructure (e.g., a carbon nanotube) (a CNT preparation step); and exposing the carbon nanotube to an energy beam (e.g., an electron beam) while vibrating the carbon nanotube (an exposure step). This facilitates modifying the carbon nanotube in length and electrical characteristics. | 12-26-2013 |
20140002959 | ACCUMULATOR DEVICE | 01-02-2014 |
20150325381 | FLAME-RETARDANT ELECTROLYTIC CAPACITOR - Provided is a flame-retardant electrolytic capacitor which is capable of maintaining flame-retardant effect even after a prolonged period of time. This is an electrolytic capacitor comprising an anode foil that is provided with an oxide film on the surface, a cathode foil, a separator, and an electrolytic solution that contains a solute in a solvent, wherein a phosphoric acid ester amide represented by the following general formula (1) is contained in the electrolytic solution: | 11-12-2015 |