Liquid Electrolytic Capacitor Patents (Class 361/503)
  • Patent number: 10504658
    Abstract: The invention pertains to a conductive material formulation comprising: (a) a conductive polymer material; and (b) an insulation material, wherein the conductive polymer material is derived from a conductive polymer and a polyanion and has a weight average molecular weight ranging from 3,000 to 30,000; and wherein the (b) insulation material is present in an amount of 0.01 part to 200 parts by weight based on 100 parts by weight of the (a) conductive polymer material. The conductive material formulation according to the invention is useful for the preparation of solid capacitors.
    Type: Grant
    Filed: January 25, 2018
    Date of Patent: December 10, 2019
    Assignee: ETERNAL MATERIAL CO., LTD.
    Inventor: Shinn-Horng Chen
  • Patent number: 10333178
    Abstract: The invention relates to an electrolyte composition containing (i) at least one aprotic polar organic solvent having a flash point above 80° C. and a dielectric constant above 10 at 25° C.; (ii) at least one flame retardant and/or non-flammable solvent; (iii) at least one compound of formula (I) R1—O(O)C—(CH2)n—C(O)O—R2 (I) wherein R1 and R2 are independently from each other selected from C1-C6 alkyl and n is 1, 2 or 3; (iv) at least one conducting salt; (v) at least one aprotic organic solvent having a dynamic viscosity below 1 mPa s at 25° C.; and (vi) optionally one or more additives.
    Type: Grant
    Filed: April 15, 2015
    Date of Patent: June 25, 2019
    Assignee: Gotion Inc.
    Inventors: Rene Schmitz, Lucas Montag, Diana Fuerst
  • Patent number: 10302586
    Abstract: A class of devices enabled by ionic conductors is highly stretchable, fully transparent to light of all colors, biocompatible or biodegradable, and capable of operation at frequencies beyond 10 kilohertz and voltages above 10 kilovolts. These devices enabled by ionic conductors can be used as large strain actuators, full-range loudspeakers, as strain or pressure sensors and as stretchable interconnects. The electromechanical transduction is achieved without electrochemical reaction. When large stretchability and high optical transmittance are required, the ionic conductors have lower sheet resistance than all existing electronic conductors.
    Type: Grant
    Filed: April 10, 2014
    Date of Patent: May 28, 2019
    Assignee: President and Fellows of Harvard College
    Inventors: Jeong Yun Sun, Christoph Matthias Keplinger, Zhigang Suo, George M. Whitesides
  • Patent number: 10204745
    Abstract: The method of making a supercapacitor using porous activated carbon from cow dung includes converting cow dung to porous activated carbon by, in a first step, preparing the dung waste by washing and drying the dung waste, and heating the dung waste in a vacuum environment to form pre-carbonized carbon. In a second step, the pre-carbonized carbon is impregnated with phosphoric acid to form a slurry, which is dried, ground, and heated in a vacuum to between 600-900° C. to form porous activated carbon. The porous activated carbon is mixed with a binder, acetylene black, and an organic solvent to form a paste, which is dried on a conductive metal foil to form an electrode. Two such electrodes (an anode and cathode) are coated with an electrolyte gel (e.g., aqueous potassium hydroxide) and separated by a polymer (e.g., PTFE) membrane to form the supercapacitor.
    Type: Grant
    Filed: April 23, 2018
    Date of Patent: February 12, 2019
    Assignee: King Saud University
    Inventors: Jothi Ramalingam Rajabathar, Hamad Abdullah Al-Lohedan, Judith J. Vijaya, M. Sivachidambaram
  • Patent number: 10080891
    Abstract: An extra-cardiovascular medical device is configured to select a capacitor configuration from a capacitor array and deliver a low voltage, pacing pulse by discharging the selected capacitor configuration across an extra-cardiovascular pacing electrode vector. In some examples, the medical device is configured to determine the capacitor configuration based on a measured impedance of the extra-cardiovascular pacing electrode vector.
    Type: Grant
    Filed: December 3, 2015
    Date of Patent: September 25, 2018
    Assignee: Medtronic, Inc.
    Inventors: Amy E. Thompson-Nauman, Melissa G. T. Christie, Mark T. Marshall, Thomas H. Spear
  • Patent number: 10014126
    Abstract: As an object to provide a lithium-ion supercapacitor having a high energy density and a high power density, capable of being charged and discharged many times, and having a long product life, there is provided a lithium-ion supercapacitor using a graphene/CNT composite electrode, the lithium-ion supercapacitor including: an anode; a cathode that is arranged to be separated from the anode; and a lithium ion electrolytic solution that fills in a space between the anode and the cathode, wherein either or both of the cathode and the anode are formed by a graphene/CNT composite, and a CNT concentration in the graphene/CNT composite is 17 wt % or more and 33 wt % or less.
    Type: Grant
    Filed: February 26, 2015
    Date of Patent: July 3, 2018
    Assignee: National Institute for Materials Science
    Inventors: Jie Tang, Faxiang Qin, Luchang Qin
  • Patent number: 10003085
    Abstract: Provided are a supporting carbon material for a solid polymer fuel cell and a metal-catalyst-particle-supporting carbon material that, when used as a carrier for a solid polymer fuel cell catalyst, have excellent power generation performance in high-humidity conditions, which are conditions in which solid polymer fuel cells are operated. A supporting carbon material for a solid polymer fuel cell and a metal-catalyst-particle-supporting carbon material characterized in being a porous carbon material, the hydrogen content being 0.004-0.010% by mass, the nitrogen adsorption BET specific surface area being 600 m2/g-1500 m2/g, and the relative intensity ratio (ID/IG) between the peak intensity (ID) in the range of 1200-1400 cm?1 known as the D-band and the peak intensity (IG) in the range of 1500-1700 cm?1 known as the G-band, obtained from the Raman spectrum, being 1.0-2.0.
    Type: Grant
    Filed: December 12, 2014
    Date of Patent: June 19, 2018
    Assignees: NIPPON STEEL & SUMITOMO METAL CORPORATION, NIPPON STEEL & SUMIKIN CHEMICAL CO., LTD.
    Inventors: Katsumasa Matsumoto, Takashi Iijima, Masataka Hiyoshi, Hiroyuki Hayashida, Kazuhiko Mizuuchi, Takumi Kouno, Masakazu Higuchi, Masakazu Katayama
  • Patent number: 9947479
    Abstract: A wet electrolytic surface mount capacitor has a body defining an interior area and having a fill port formed through a wall of the body. A capacitive element is positioned in an interior of the body and is isolated from the body. A surface mount anode termination is in electrical communication with the capacitive element and isolated from the body. A surface mount cathode termination is in electrical communication with the body. An electrolyte is contained in the interior area of the body, and is introduced into the interior area of the body through the fill port. A fill port plug is positioned adjacent the fill port. A fill port cover compresses the fill port plug against the fill port to seal the fill port, and may be welded in place. A method of forming the capacitor is also provided.
    Type: Grant
    Filed: November 16, 2015
    Date of Patent: April 17, 2018
    Assignee: VISHAY SPRAGUE, INC.
    Inventors: Alex Eidelman, Pavel Vaisman, Gabi Shilo, Evgeny Petukhov, Andrey Mitiagin
  • Patent number: 9941055
    Abstract: A method for preparing a solid electrolytic capacitor and an improved solid electrolytic capacitor is provided. The method includes providing an anode, forming a dielectric on the anode, forming a cathode on the dielectric and forming subsequent layers on the cathode wherein the cathode and subsequent layers preferably comprise interlayers. At least one interlayer comprises a monomer, oligomer or polymer with multifunctional or multiple reactive groups and an adjacent layer comprises a molecule with crosslinkable functionality. The oligomer or polymer with multifunctional or multiple reactive groups on one layer react with the crosslinkable functionality in the adjacent layer.
    Type: Grant
    Filed: June 18, 2015
    Date of Patent: April 10, 2018
    Assignee: KEMET Electronics Corporation
    Inventors: Antony P Chacko, Danny Yiu Kai Hui
  • Patent number: 9887048
    Abstract: Provided is a stretchable supercapacitor and a method of manufacturing the same. The stretchable supercapacitor includes a separator between first and second current collectors. The first and second current collectors each including an active material. The second current collector is on the first current collector. The separator includes an electrolyte. Each of the separator, the first current collector and the second current collector includes an elastic polymer layer. The first and second current collectors may each have a 3-dimensional nano-pore structure. The stretchable supercapacitor may further include a first electrode in contact with the first current collector and a second electrode in contact with the second current collector. The elastic polymer layers may include at least one of styrene-b-butadiene-b-styrene (SBS), polyurethane, polyurethane acrylate, acrylate polymer, acrylate terpolymer, and silicone-based polymer.
    Type: Grant
    Filed: October 14, 2015
    Date of Patent: February 6, 2018
    Assignees: SAMSUNG ELECTRONICS CO., LTD., KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Taeho Kim, Jangwook Choi, Yonghee Lee
  • Patent number: 9875855
    Abstract: A wet tantalum capacitor of either a single anode design or of multiple anode configurations having cathode active material supported on the casing and sealed in its own separator material is described. The separator “covers’ the cathode active material and is adhered directly to the casing. For a multiple anode design, an inner cathode foil positioned between opposed anode pellets is sealed in its own separator bag. Preferably, a polymeric restraining device prevents the anode from contacting the casing. The completed anode/cathode electrode assembly is sealed in the casing, which is filled with electrolyte thru a port. The fill port is hermetically sealed to complete the capacitor.
    Type: Grant
    Filed: October 26, 2016
    Date of Patent: January 23, 2018
    Assignee: Greatbatch Ltd.
    Inventors: Anthony C. Perez, Barry C. Muffoletto, Jason T. Hahl, Mark T. Muffoletto
  • Patent number: 9824829
    Abstract: A capacitor is described. A casing for the capacitor comprises a container having a face wall joined to a surrounding sidewall extending to a annular edge defining an open end of the container. An inwardly extending protrusion is located intermediate the face wall and the annular edge at the container open end. A partition plate is supported on the protrusion to thereby provide a first capacitor enclosure bounded by the face wall, the surrounding sidewall and the partition plate. A cover plate is secured to the annular edge to close the open end of the container and provide a second capacitor enclosure bounded by the partition plate, the surrounding sidewall and the cover plate. An anode, for example of tantalum, and a cathode active material, for example of ruthenium oxide, reside in capacitive association with each other inside each of the first and second capacitor enclosures. A working electrolyte is also contained in the capacitor enclosures.
    Type: Grant
    Filed: March 23, 2017
    Date of Patent: November 21, 2017
    Assignee: Greatbatch Ltd.
    Inventors: Barry C. Muffoletto, Anthony C. Perez
  • Patent number: 9786445
    Abstract: One embodiment is an EDLC with a capacitor cell that includes two electrodes of opposite polarity aligned in parallel, and a peptide separator disposed between the electrodes. The separator may be a peptide coating on an electrode surface. Another embodiment is an electrode for an electrochemical energy storage device, such as an EDLC, the electrode including graphene and coated with peptide. The peptide may act as a separator for the EDLC. A further embodiment is an electrode for an electrochemical energy storage device, the electrode-unit including: two graphene layers, CNTs, and electrolyte. The graphene layers are arranged separated along a first axis and aligned with parallel surfaces, where at least one graphene layer is coated with peptide. The CNTs are arranged along a second axis orthogonal to the first axis and disposed between the graphene layers. The electrolyte is impregnated within the volume defined between the graphene layers and CNTs.
    Type: Grant
    Filed: January 13, 2015
    Date of Patent: October 10, 2017
    Assignee: Elbit Systems Land and C41 Ltd.
    Inventors: Ervin Tal-Gutelmacher, Erez Schreiber
  • Patent number: 9379418
    Abstract: A lithium-ion battery structure with a third electrode as reference electrode is disclosed. The reference electrode may be fabricated from lithium metal, lithiated carbon, or a variety of other lithium-containing electrode materials. A porous current collector allows permeation of reference lithium ions from the reference electrode to the cathode or anode, enabling voltage monitoring under actual operation of a lithium-ion battery. The reference electrode therefore does not need to be spatially between the battery anode and cathode, thus avoiding a shielding effect. The battery structure includes an external reference circuit to dynamically display the anode and cathode voltage. The battery structure can result in improved battery monitoring, enhanced battery safety, and extended battery life.
    Type: Grant
    Filed: June 20, 2013
    Date of Patent: June 28, 2016
    Assignee: HRL Laboratories, LLC
    Inventors: John Wang, Ping Liu, Elena Sherman, Souren Soukiazian, Mark Verbrugge
  • Patent number: 9355786
    Abstract: The invention relates to electrical engineering. The multi-element electrochemical capacitor of this invention comprises at least one layer of electrical insulation film with alternating opposite-polarity electrode films placed thereon in succession and interspaced by a porous ion-permeable separator, coiled into a roll. Each electrode sheet is a substrate of nonwoven polymer material at a high pore ratio, with at least one electrode in the form of an electrochemically active layer attached to one side or both sides thereof, or embedded within the same. The capacitor also comprises contact electrodes.
    Type: Grant
    Filed: April 19, 2011
    Date of Patent: May 31, 2016
    Assignee: UG INVESTMENTS LTD.
    Inventors: Yuriy Midhatovich Ginatulin, Andrey Viktorovich Desyatov, Anton Vladimirovich Asseyev, Aleksandr Petruvich Kubyshkin, Sergey Ivanovich Sirotin, Lyubov Vladimirovna Bulibekova, Lyubov Densunovna Li
  • Patent number: 9324503
    Abstract: A capacitor for use in relatively high voltage environments is provided. The solid electrolyte is formed from a plurality of pre-polymerized particles in the form of a dispersion. In addition, the anode is formed such that it contains at least one longitudinally extending channel is recessed therein. 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.
    Type: Grant
    Filed: March 6, 2014
    Date of Patent: April 26, 2016
    Assignee: AVX Corporation
    Inventors: Martin Biler, Jan Petrzilek
  • Patent number: 9208954
    Abstract: An electrolytic capacitor includes a capacitor element, an electrolyte solution with which the capacitor element is impregnated, and an outer package enclosing the capacitor element and the electrolyte solution. The capacitor element includes an anode foil having a dielectric layer on a surface thereof, a cathode foil, a separator disposed between the anode foil and the cathode foil, and a solid electrolyte layer in contact with the dielectric layer of the anode foil and the cathode foil. The electrolyte solution contains a low-volatile solvent that is at least one of polyalkylene glycol and a derivative of polyalkylene glycol.
    Type: Grant
    Filed: February 7, 2011
    Date of Patent: December 8, 2015
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Hiroyuki Matsuura, Shigetaka Furusawa, Hidehiro Sasaki, Tatsuji Aoyama
  • Patent number: 9208958
    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.
    Type: Grant
    Filed: February 1, 2012
    Date of Patent: December 8, 2015
    Assignee: JM Energy Corporation
    Inventors: Teruaki Tezuka, Toshihiro Hayashi, Nobuo Ando, Yuu Watanabe, Makoto Taguchi, Naoshi Yasuda
  • Patent number: 9105925
    Abstract: An anode active material including a porous transition metal oxide; an anode including the anode active material; a lithium battery including the anode; and a method of preparing the anode active material.
    Type: Grant
    Filed: November 6, 2009
    Date of Patent: August 11, 2015
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Han-su Kim, Chan-ho Pak, Ji-man Kim, Jeong-kuk Sohn, Soo-sung Kong
  • Patent number: 9090986
    Abstract: Electrode foils suitable for use in electrolytic capacitors, including those having multiple configurations, have improved strength, reduced brittleness, and increased capacitance compared to conventional anode foils for electrolytic capacitors. Exemplary methods of manufacturing an anode foil suitable for use in an electrolytic capacitor include forming a pattern of etch resist on a surface of a substrate; etching a first area of the surface substantially enclosed by the pattern and a second area in intervals between the pattern to form tunnels in first and second areas of the surface; and removing the resist material revealing a non-etched frame. The resist material may be deposited, for example, by ink-jet printing, stamping or screen printing. Additionally, an etch resist pattern may be used to form strength lines on the substrate surface.
    Type: Grant
    Filed: January 30, 2014
    Date of Patent: July 28, 2015
    Assignee: Pacesetter, Inc.
    Inventors: Ralph Jason Hemphill, David R. Bowen, Troy L. McCurry
  • Patent number: 9036332
    Abstract: The present disclosure is related to hybrid capacitors specifically to PbO2/Activated Carbon hybrid ultracapacitors. The present disclosure is also related to hybrid capacitors specifically to PbO2/Activated Carbon hybrid ultracapacitors with an inorganic thixotropic-gelled-polymeric-electrolyte. The hybrid ultracapacitors of the present disclosure is simple to assemble, bereft of impurities and can be fast charged/discharged with high faradiac-efficiency.
    Type: Grant
    Filed: July 18, 2012
    Date of Patent: May 19, 2015
    Assignee: Indian Institute of Science
    Inventors: Ashok Kumar Shukla, Anjan Banerjee, Musuwathi Krishnamoorthy Ravikumar, Shaik Abdul Gaffoor
  • Publication number: 20150132682
    Abstract: The present invention relates to a method for producing an electrochemical cell, such as in particular a secondary battery, a double-layer capacitor, an electrolytic capacitor or a fuel cell, in which a cell vessel containing two electrodes of one-piece or multi-part design and at least one separator is filled with free-flowing electrolyte. The object of the invention is to match the quantity of electrolyte in an electrochemical cell as exactly as possible to the free volume actually present. The object is achieved in that, before the filling with the electrolyte, the quantity of electrolyte to be put in is determined at least while taking into account the actual thicknesses and the actual weights of the electrodes in the cell vessel and of the separator in the cell vessel.
    Type: Application
    Filed: April 29, 2013
    Publication date: May 14, 2015
    Applicant: Evonik Litarion GmbH
    Inventor: Thomas Hecht
  • Patent number: 9030803
    Abstract: An electrochemical energy storage system includes a positive electrode, a negative electrode disposed proximally to and not in contact with the positive electrode, and a non-aqueous electrolyte, wherein the positive electrode and the negative electrode are immersed in the non-aqueous electrolyte, and a case is presented in the energy storage system to accommodate the non-aqueous electrolyte, the positive electrode, and the negative electrode. The positive electrode has a porous matrix having a plurality of micrometer sized pores and nanostructured metal oxides, wherein the porous matrix is a 3-dimensional (3D) mesoporous metal or a 3D open-structured carbonaceous material, and the nanostructured metal oxides are coated inside the plurality of pores of the porous matrix. The non-aqueous electrolyte includes organic salts having acylamino group and lithium salts characterized as LiX, wherein Li is lithium and X comprises ClO4?, SCN?, PF6?, B(C2O4)2?, N(SO2CF3)2?, CF3SO3?, or the combination thereof.
    Type: Grant
    Filed: May 24, 2012
    Date of Patent: May 12, 2015
    Assignee: National Synchrotron Radiation Research Center
    Inventors: Ming Jay Deng, Jeng Kuei Chang, Jin Ming Chen, Kueih Tzu Lu
  • Patent number: 9025316
    Abstract: An electrical component includes an inkjet-printed graphene electrode. Graphene oxide flakes are deposited on a substrate in a graphene oxide ink using an inkjet printer. The deposited graphene oxide is thermally reduced to graphene. The electrical properties of the electrode are comparable to those of electrodes made using activated carbon, carbon nanotubes or graphene made by other methods. The electrical properties of the graphene electrodes may be tailored by adding nanoparticles of other materials to the ink to serve as conductivity enhancers, spacers, or to confer pseudocapacitance. Inkjet-printing can be used to make graphene electrodes of a desired thickness in preselected patterns. Inkjet printing can be used to make highly-transparent graphene electrodes. Inkjet-printed graphene electrodes may be used to fabricate double-layer capacitors that store energy by nanoscale charge separation at the electrode-electrolyte interface (i.e., “supercapacitors”).
    Type: Grant
    Filed: July 10, 2014
    Date of Patent: May 5, 2015
    Assignees: The Trustees of The Stevens Institute of Technology, The United States of America, as Represented by The Secretary of The Army
    Inventors: Woo Young Lee, Linh Le, De Kong, Matthew Henderson Ervin, James L. Zunino, III, Brian E. Fuchs
  • Patent number: 9025312
    Abstract: A collector for an electric double layer capacitor including a conductive sheet, and a film adhered on surface of the conductive sheet and including carbon fine particle and polysaccharide and/or cross-linked polysaccharide. An electrode for an electric double layer capacitor including a collector having a conductive sheet and a film adhered on surface of the conductive sheet, and a film including activated carbon and adhered on surface of the film of the collector. The film of the collector includes carbon fine particle and polysaccharide and/or cross-linked polysaccharide. An electric double layer capacitor including an electrode, a separator, and an electrolyte. The electrode includes a collector having a conductive sheet and a film adhered on surface of the conductive sheet, and a film including activated carbon and adhered on surface of the film of the collector. The film of the collector includes carbon fine particle and polysaccharide and/or cross-linked polysaccharide.
    Type: Grant
    Filed: November 22, 2011
    Date of Patent: May 5, 2015
    Assignee: Showa Denko K.K.
    Inventor: Masahiro Ohmori
  • Patent number: 9025315
    Abstract: Electrochemical energy storage devices such as electric double layer capacitors include a flexible metal contact current collector establishing electrical contact with a conductive housing at numerous contact points. The flexible current collector simplifies manufacturing of the device and avoids laser welding on the conductive housing. The manufacture devices are operable with a reduced direct current resistance by virtue of the flexible current collector.
    Type: Grant
    Filed: March 6, 2013
    Date of Patent: May 5, 2015
    Assignee: Cooper Technologies Company
    Inventors: Cyrus Sam Rustomji, Kyle Yun-Su Kim
  • Patent number: 9013861
    Abstract: In one embodiment a charge storage device includes first (110) and second (120) electrically conductive structures separated from each other by a separator (130). At least one of the first and second electrically conductive structures includes a porous structure containing multiple channels (111, 121). Each one of the channels has an opening (112, 122) to a surface (115, 125) of the porous structure. In another embodiment the charge storage device includes multiple nanostructures (610) and an electrolyte (650) in physical contact with at least some of the nanostructures. A material (615) having a dielectric constant of at least 3.9 may be located between the electrolyte and the nanostructures.
    Type: Grant
    Filed: April 2, 2010
    Date of Patent: April 21, 2015
    Assignee: Intel Corporation
    Inventors: Donald S. Gardner, Eric C. Hannah, Rong Chen, John L. Gustafson
  • Patent number: 9013860
    Abstract: An asymmetric supercapacitor includes a first structure and a second structure spaced apart from said second structure. One of the structures comprises an anode, and the other of the first and second structures comprises a cathode, wherein the first structure comprises an activated carbon electrode, and the second structure comprises a nanocomposite electrode. The nanocomposite electrode comprises a first network of nanowires that are interpenetrating with a second network of carbon nanotubes.
    Type: Grant
    Filed: August 10, 2012
    Date of Patent: April 21, 2015
    Assignee: The Regents of the University of California
    Inventors: Zheng Chen, Yunfeng Lu
  • Patent number: 9011709
    Abstract: The present invention relates to an electrolyte of an energy storage device. An electrolyte composition in accordance with an embodiment of the present invention includes an electrolyte salt, a carbonate solvent, and at least one nitrile solvent of acetonitrile and propionitrile.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: April 21, 2015
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Jae Hoon Choi, Ji Sung Cho, Eun Sil Kim, Se Woong Paeng, Bae Kyun Kim
  • Patent number: 9007742
    Abstract: Capacitors containing novel electrodes and electrolytes are described. One electrode composition comprises an oxide of Mn and Fe in a Mn:Fe molar ratio of 3:1 to 5:1. Another electrode composition comprises an oxide comprising Ni, Co, and Fe; wherein the Ni and Co are present in a Ni/Co molar ratio in the range of 0.5 to 2 and a Fe and Ni are present in a Ni/Fe molar ratio in the range of 1.0 to 10. The resulting capacitors can be characterized by superior properties. Methods of forming the electrodes from gels are also described. An electrolyte comprising a Li salt in a carbonate solution, wherein the carbonate solution comprises 10-30% ethylene carbonate and 70-90% propylene carbonate is also described.
    Type: Grant
    Filed: March 31, 2010
    Date of Patent: April 14, 2015
    Assignee: Battelle Memorial Institute
    Inventors: Steven M. Risser, Vincent D. McGinniss, Bing Tan, Kevin B. Spahr, Homero Castenada-Lopez
  • Patent number: 9001496
    Abstract: An electrode for electric double-layer capacitor includes a collector with a protective layer containing phosphorous on its surface, and a polarizable electrode layer that is formed on this collector and can adsorb and desorb ions. An amount of a phosphorous compound per unit surface area of the collector, eluted when the collector is immersed into water, is not greater than 1.35 mg/m2 in terms of phosphorous equivalent. An electric double-layer capacitor employs this electrode for at least one of a positive electrode and a negative electrode.
    Type: Grant
    Filed: June 6, 2013
    Date of Patent: April 7, 2015
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Tomohiro Okuzawa, Motonori Morikazu
  • Patent number: 9001495
    Abstract: An electrode useful in an energy storage system, such as a capacitor, includes an electrode that includes at least one to a plurality of layers of compressed carbon nanotube aggregate. Methods of fabrication are provided. The resulting electrode exhibits superior electrical performance in terms of gravimetric and volumetric power density.
    Type: Grant
    Filed: August 16, 2012
    Date of Patent: April 7, 2015
    Assignee: FASTCAP Systems Corporation
    Inventors: Fabrizio Martini, Nicolo Michele Brambilla, Riccardo Signorelli
  • Patent number: 8976508
    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.
    Type: Grant
    Filed: October 24, 2013
    Date of Patent: March 10, 2015
    Assignee: Seiko Instruments Inc.
    Inventors: Tsuneaki Tamachi, Ryo Sato, Kenji Ogata, Isamu Shinoda, Shunji Watanabe
  • Patent number: 8976509
    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.
    Type: Grant
    Filed: January 27, 2014
    Date of Patent: March 10, 2015
    Assignee: Toyo Aluminium Kabushiki Kaisha
    Inventors: Kunihiko Nakayama, Zenya Ashitaka, Hidetoshi Inoue
  • Patent number: 8976507
    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.
    Type: Grant
    Filed: March 27, 2012
    Date of Patent: March 10, 2015
    Assignee: California Institute of Technology
    Inventors: Adrianus Indrat Aria, Bradley Lyon, Morteza Gharib
  • Patent number: 8971019
    Abstract: A wet electrolytic capacitor that contains an anodically oxidized porous anode body, a cathode containing a metal substrate coated with a conductive coating, and a working electrolyte that wets the dielectric on the anode. The conductive coating contains an alkyl-substituted poly(3,4-ethylenedioxythiophene) having a certain structure. Such polymers can result in a higher degree of capacitance than many conventional types of coating materials. Further, because the polymers are generally semi-crystalline or amorphous, they can dissipate and/or absorb the heat associated with the high voltage. The degree of surface contact between the conductive coating and the surface of the metal substrate may also be enhanced in the present invention by selectively controlling the manner in which the conductive coating is formed.
    Type: Grant
    Filed: March 4, 2013
    Date of Patent: March 3, 2015
    Assignee: AVX Corporation
    Inventor: Martin Biler
  • Patent number: 8971020
    Abstract: A wet electrolytic capacitor that contains an anodically oxidized porous anode body, a cathode containing a metal substrate coated with a conductive coating, and a working electrolyte that wets the dielectric on the anode. The conductive coating contains a conductive copolymer having at least one thiophene repeating unit, as well as a pyrrole repeating unit and/or aniline repeating unit.
    Type: Grant
    Filed: March 4, 2013
    Date of Patent: March 3, 2015
    Assignee: AVX Corporation
    Inventors: Martin Biler, Jan Petrzilek, Dirk H. Dreissig, Mitchell D. Weaver
  • Patent number: 8964357
    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.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: February 24, 2015
    Assignee: Seiko Instruments Inc.
    Inventors: Tsuneaki Tamachi, Ryo Sato, Kazumi Tanaka, Kensuke Tahara, Tadahito Suzuki, Akira Sato
  • Patent number: 8953302
    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.
    Type: Grant
    Filed: December 5, 2012
    Date of Patent: February 10, 2015
    Assignee: Taiyo Yuden Co., Ltd.
    Inventor: Naoto Hagiwara
  • Patent number: 8947855
    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.
    Type: Grant
    Filed: June 28, 2012
    Date of Patent: February 3, 2015
    Assignee: Empire Technology Development LLC
    Inventor: Vincenzo Casasanta, III
  • Patent number: 8927967
    Abstract: An electrochemically-gated field-effect transistor includes a source electrode, a drain electrode, a gate electrode, a transistor channel and an electrolyte. The transistor channel is located between the source electrode and the drain electrode. The electrolyte completely covers the transistor channel and has a one-dimensional nanostructure and a solid polymer-based electrolyte that is employed as the electrolyte.
    Type: Grant
    Filed: April 24, 2013
    Date of Patent: January 6, 2015
    Assignee: Karlsruhe Institute of Technology
    Inventors: Subho Dasgupta, Horst Hahn, Babak Nasr
  • Publication number: 20150004473
    Abstract: A secondary battery including a plurality of electrode assemblies including: a first electrode assembly including a first positive electrode active material; and a secondary electrode assembly including a second positive electrode active material; the first electrode assembly and the second electrode assembly being electrically connected to each other, the first positive electrode active material being different from the second positive electrode active material, and a discharge capacity ratio of the second electrode assembly being in a range of 25% to 80%, based on a total discharge capacity of the first electrode assembly and the second electrode assembly, is disclosed.
    Type: Application
    Filed: October 28, 2013
    Publication date: January 1, 2015
    Applicant: SAMSUNG SDI CO., LTD.
    Inventors: Dae-Seop Lim, Jin-Man Jeoung, Jung-Woo An, Jeong-Tae Kim
  • Publication number: 20150003033
    Abstract: An energy storage device includes an electrode made from an active material in which a plurality of channels have been etched. The channels are coated with an electrically functional substance selected from a conductor and an electrolyte.
    Type: Application
    Filed: June 27, 2013
    Publication date: January 1, 2015
    Inventors: Yang Liu, Priyanka Pande, Bum Ki Moon, Michael C. Graf, Donald S. Gardner, Nicolas Cirigliano, Shanthi Murali, Zhaohui Chen
  • Patent number: 8917492
    Abstract: A power storage module for a hybrid system. The module includes internal absorption elements for absorbing electrolytes, and gasses thereof, that may have separated from a storage cell within the module owing to overvoltages. The module may further include external indicator(s) for indicating that such separated electrolytes are contained within the module case. It is possible to protect a user of the power storage module who wants to open the case of this module, in the event that the power storage cell has released electrolyte in gaseous and/or liquid form into the interior of the case.
    Type: Grant
    Filed: September 7, 2010
    Date of Patent: December 23, 2014
    Assignee: Valeo Equipements Electriques Moteur
    Inventors: Fabien Guerin, Roger Abadia, Benoît Soucaze-Guillous, Alexis Hosni
  • Patent number: 8913368
    Abstract: 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 1, a region 2 and a region 3 in this order, each region is configured so that the average of the amounts of aluminum in the region 1 and the region 3 differs from the amount of aluminum in the region 2.
    Type: Grant
    Filed: May 30, 2012
    Date of Patent: December 16, 2014
    Assignees: Sumitomo Electric Industries, Ltd., Sumitomo Electric Toyama Co., Ltd.
    Inventors: Akihisa Hosoe, Kazuki Okuno, Hajime Ota, Koutarou Kimura, Kengo Goto, Hideaki Sakaida, Junichi Nishimura
  • Patent number: 8913369
    Abstract: Disclosed are an aluminum electrolytic capacitor having low impedance properties and a long service life, and an electrolytic solution which enables to give such capacitor. The electrolytic solution contains a solvent containing water, a phosphorus oxoacid ion-generating compound which can generate a phosphorus oxoacid ion in an aqueous solution, and a chelating agent which can coordinate with aluminum to form an aqueous aluminum chelate complex. The electrolytic solution further contains a compound selected from the group consisting of azelaic acid and an azelaic acid salt, and a compound selected from the group consisting of formic acid, a formic acid salt, adipic acid, an adipic acid salt, glutaric acid and a glutaric acid salt. The content of azelaic acid and/or the azelaic acid salt is at least 0.03 moles per kg of the solvent.
    Type: Grant
    Filed: January 28, 2014
    Date of Patent: December 16, 2014
    Assignee: Nippon Chemi-Con Corporation
    Inventors: Masao Sakakura, Junichi Kawakami, Kazuma Okura, Shingo Takeuchi, Masashi Ozawa, Kenji Tamamitsu
  • Patent number: 8891224
    Abstract: A capacitor provides a plurality of selectable capacitance values, by selective connection of six capacitor sections of a capacitive element each having a capacitance value. The capacitor sections are provided in a plurality of wound cylindrical capacitive elements. Two vertically stacked wound cylindrical capacitance elements may each provide three capacitor sections. There may be six separately wound cylindrical capacitive elements each providing a capacitor section. The capacitor sections have a common element terminal.
    Type: Grant
    Filed: August 14, 2013
    Date of Patent: November 18, 2014
    Assignee: America Radionic Company, Inc.
    Inventor: Robert M. Stockman
  • Patent number: 8885325
    Abstract: 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.
    Type: Grant
    Filed: October 31, 2012
    Date of Patent: November 11, 2014
    Assignee: Taiyo Yuden Co., Ltd.
    Inventors: Takatoshi Nagase, Koji Kano, Takeo Tsuzuki
  • Patent number: 8873220
    Abstract: 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.
    Type: Grant
    Filed: December 15, 2010
    Date of Patent: October 28, 2014
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: Gregory J. Sherwood, Michael J. Root, Jay E. Daley, Eric Stemen
  • Publication number: 20140308554
    Abstract: This disclosure provides collector plates for an energy storage device, energy storage devices with a collector plate, and methods for manufacturing the same. In one aspect, a collector plate includes a body. One or more apertures extend into the body. The apertures are configured to allow a portion of a free end of a spirally wound current collector of a spirally wound electrode for an energy storage device to extend into the one or more apertures.
    Type: Application
    Filed: April 7, 2014
    Publication date: October 16, 2014
    Applicant: Maxwell Technologies, Inc.
    Inventor: Alexander D. Khakhalev