The Alkali Metal Is Lithium Patents (Class 429/231.95)
-
Patent number: 9017876Abstract: A method of producing a positive electrode active material, comprising the steps of: preparing a solution by dissolving, in a solvent, respective predetermined amounts of a lithium source, a M source, a phosphorus source and a X source necessary for forming a positive electrode active material represented by the following general formula (1) having an olivine structure; gelating the obtained solution by addition of a cyclic ether; and calcinating the generated gel to obtain a carbon-coated lithium-containing composite oxide, wherein the positive electrode active material is represented by the general formula (1): LixMyP1-zXzO4??(1) wherein M is at least one element selected from the group consisting of Fe, Ni, Mn, Zr, Sn, Al and Y, X is at least one selected from the group consisting of Si and Al, and 0<x?2, 0.8?y?1.2, 0?z?1.Type: GrantFiled: October 18, 2011Date of Patent: April 28, 2015Assignee: Sharp Kabushiki KaishaInventors: Toshitsugu Sueki, Motoaki Nishijima, Koji Ohira, Shogo Esaki, Isao Tanaka, Yukinori Koyama, Katsuhisa Tanaka, Koji Fujita, Shunsuke Murai
-
Patent number: 9017841Abstract: Disclosed is a method for preparing an electrochemical device, comprising the steps of: charging an electrochemical device using an electrode active material having a gas generation plateau potential in a charging period to an extent exceeding the plateau potential; and degassing the electrochemical device. An electrochemical device, which comprises an electrode active material having a gas generation plateau potential in a charging period, and is charged to an extent exceeding the plateau potential and then degassed, is also disclosed.Type: GrantFiled: May 11, 2012Date of Patent: April 28, 2015Assignee: LG Chem, Ltd.Inventors: Sung Kyun Chang, Eui Yong Bang, Min Chul Jang, Sang Hoon Choy, Ki Young Lee
-
Patent number: 9017875Abstract: The present application provides a nonaqueous electrolyte secondary battery which includes a cathode having a cathode active material layer, an anode, and a nonaqueous electrolyte, wherein the cathode active material layer includes secondary particles of a lithium phosphate compound having olivine structure, an average particle diameter A of primary particles constituting the secondary particles is 50 nm or more and 500 nm or less, and a ratio B/A of a pore diameter B of the secondary particles to the average particle diameter A of the primary particles is 0.10 or more and 0.90 or less.Type: GrantFiled: December 1, 2008Date of Patent: April 28, 2015Assignee: Sony CorporationInventor: Takehiko Ishii
-
Publication number: 20150111104Abstract: A method is described for manufacturing a lithium-sulfur cell or lithium-sulfur battery, in particular a solid-state lithium-sulfur cell or lithium-sulfur battery. A nanowire network is provided in a method step a) composed of an electron- and lithium ion-conducting ceramic mixed conductor or a mixed conductor precursor for forming an electron- and lithium ion-conducting ceramic mixed conductor. The nanowire network is coated with a lithium ion-conducting solid-state electrolyte layer in a method step b). The nanowire network is optionally infiltrated with sulfur in a method step c). A cathode current arrester is applied to the uncoated side of the nanowire network in a method step d). Moreover, a lithium-sulfur cell, a lithium-sulfur battery, and a mobile or stationary system are described as well.Type: ApplicationFiled: March 5, 2013Publication date: April 23, 2015Applicant: Robert Bosch GmbHInventors: Christine Engel, Ulrich Eisele, Andre Moc
-
Publication number: 20150111105Abstract: To provide an active material with high capacity, high initial charge-discharge efficiency, and high average discharge voltage. An active material according to the present invention includes a first active material and a second active material, wherein the ratio (?) of the second active material (B) to the total amount by mole of the first active material (A) and the second active material (B) satisfies 0.4 mol %???18 mol % [where ?=(B/(A+B))×100].Type: ApplicationFiled: March 27, 2013Publication date: April 23, 2015Applicant: TDK CORPORATIONInventors: Tomohiko Kato, Atsushi Sano, Masaki Sobu, Akinobu Nojima
-
Patent number: 9012088Abstract: An anode composition for a lithium secondary battery is provided. The anode composition comprises an anode active material, a conductive material, and an acrylonitrile-acrylic acid copolymer with a high molecular weight as a binder. The acrylonitrile-acrylic acid copolymer has a molar ratio of acrylonitrile to acrylic acid of 1:0.01-2. Further provided are a method for preparing the anode composition and a lithium secondary battery using the anode composition. The binder has improved resistance to an electrolyte solution due to its enhanced adhesive strength. In addition, the use of the anode composition prevents the active material layer from being peeled off or separated from a current collector during charge and discharge to achieve improved capacity and cycle life characteristics of the battery.Type: GrantFiled: August 7, 2008Date of Patent: April 21, 2015Assignee: LG Chem, Ltd.Inventors: Eun Suok Oh, Young Min Kim, Ok Sun Kim, Min Ah Kang
-
Patent number: 9012089Abstract: A positive electrode system of an electric storage device includes first and second positive electrodes. The first and second positive electrodes include current collectors, and first and second positive-electrode mixture layers, respectively. The negative electrode system of the electric storage device has a negative electrode including a current collector and a negative-electrode mixture layer. The first positive electrode and the second positive electrode are arranged across the negative electrode. The first positive-electrode mixture layer and the second positive-electrode mixture layer are connected to each other, and of different types. Through-holes are formed in the current collector of the negative electrode arranged between the first positive-electrode mixture layer and the second positive-electrode mixture layer.Type: GrantFiled: July 7, 2008Date of Patent: April 21, 2015Assignee: Fuji Jukogyo Kabushiki KaishaInventors: Nobuo Ando, Kenji Kojima
-
Patent number: 9012090Abstract: A battery has an anode, a separator adjacent the anode, and a cathode adjacent the separator opposite the anode, the cathode comprising interdigitated stripes of materials, one of the materials forming a pore channel.Type: GrantFiled: December 27, 2012Date of Patent: April 21, 2015Assignee: Palo Alto Research Center IncorporatedInventors: Chang-Jun Bae, Eric J. Shrader, Corie Lynn Cobb
-
Patent number: 9012079Abstract: A composite electrode includes an active component directly bonded to a current collector. The direct bonding provides a low resistance contact between the current collector and the active material. The active component can be provided as fibers of silicon. The fibers can be free or attached to a support.Type: GrantFiled: July 17, 2008Date of Patent: April 21, 2015Assignee: Nexeon LtdInventor: Mino Green
-
Patent number: 9012091Abstract: An as-prepared cathode for a secondary battery, the cathode including an alkaline source material including an alkali metal oxide, an alkali metal sulfide, an alkali metal salt, or a combination of any two or more thereof.Type: GrantFiled: January 29, 2013Date of Patent: April 21, 2015Assignee: UChicago Argonne, LLCInventors: Huiming Wu, Khalil Amine, Ali Abouimrane
-
Publication number: 20150104707Abstract: The present disclosure refers to a cathode material composite having improved conductivity, and a cathode and electrochemical device having the cathode material composite. In accordance with one embodiment of the present disclosure, a conductive polymer is positioned on the surface of a shell present in the form of a tetragonal structure in the lithium manganese oxide, thereby enhancing electrical conductivity to be highly involved in reaction around 3V, and providing a conductive path to improve the capacity, life and rate characteristics of an electrochemical device.Type: ApplicationFiled: December 18, 2014Publication date: April 16, 2015Applicant: LG Chem, Ltd.Inventors: Ji-Hye Park, Song-Taek Oh, Hyeok-Moo Lee
-
Publication number: 20150104713Abstract: The invention relates to a process for fabrication of an electrode film in an all-solid-state battery comprising successive steps to: a) Procure a substrate, preferably a conducting substrate, b) Deposit an electrode film on said substrate by electrophoresis, from a suspension containing particles of electrode materials, c) Dry the film obtained in the previous step, d) Thermal consolidation of the electrode film obtained in the previous step by sintering, sintering being done at a temperature TR that preferably does not exceed 0.7 times the melting temperature (expressed in ° C.), even more preferably does not exceed 0.5 times the melting temperature (expressed in ° C.), and much more preferably does not exceed 0.3 times the melting temperature (expressed in ° C.) of the electrode material that melts at the lowest temperature.Type: ApplicationFiled: October 30, 2012Publication date: April 16, 2015Applicant: I-TENInventors: Fabien Gaben, Frédéric Bouyer, Bruno Vuillemin
-
Patent number: 9005811Abstract: A composite of silicon and tin is prepared as a negative electrode composition with increased lithium insertion capacity and durability for use with a metal current collector in cells of a lithium-ion battery or a lithium-sulfur battery. This negative electrode material is formed such that the silicon is present as a distinct amorphous phase in a matrix phase of crystalline tin. While the tin phase provides electron conductivity, both phases accommodate the insertion and extraction of lithium in the operation of the cell and both phases interact in minimizing mechanical damage to the material as the cell experiences repeated charge and discharge cycles. In general, roughly equal atomic proportions of the tin and silicon are used in forming the phase separated composite electrode material.Type: GrantFiled: December 13, 2013Date of Patent: April 14, 2015Assignee: GM Global Technology Operations LLCInventors: Xingcheng Xiao, Anil K. Sachdev, Mark W. Verbrugge, Ping Liu, John S. Wang
-
Patent number: 9005816Abstract: A cathode includes a carbon material having a surface, the surface having a first thin layer of an inert material and a first catalyst overlaying the first thin layer, the first catalyst including metal or metal oxide nanoparticles, wherein the cathode is configured for use as the cathode of a lithium-air battery.Type: GrantFiled: March 6, 2013Date of Patent: April 14, 2015Assignee: UChicago Argonne, LLCInventors: Khalil Amine, Jun Lu, Peng Du, Yu Lei, Jeffrey W. Elam
-
Patent number: 9005818Abstract: A negative electrode active material including mesoporous silica having mesopores filled with a metal and a lithium battery including the same.Type: GrantFiled: March 8, 2011Date of Patent: April 14, 2015Assignee: Samsung SDI Co., Ltd.Inventors: So-Ra Lee, Jae-Myung Kim, Jun-Sik Kim, Kyeu-Yoon Sheem
-
Patent number: 9005817Abstract: A lithium battery electrode body includes: a collector electrode; and an electrode mixture layer in which a plurality of first particles including electrode active material and a plurality of second particles including solid electrolyte are mixed, wherein the electrode mixture layer is provided on one of sides of the collector electrode, and an average particle size of the plurality of second particles is smaller than an average particle size of the plurality of first particles.Type: GrantFiled: August 9, 2010Date of Patent: April 14, 2015Assignee: Seiko Epson CorporationInventor: Sukenori Ichikawa
-
Patent number: 9005814Abstract: Highly dispersed lithium titanate crystal structures having a thickness of few atomic layers level and the two-dimensional surface in a plate form are supported on carbon nanofiber (CNF). The lithium titanate crystal structure precursors and CNF that supports these are prepared by a mechanochemical reaction that applies sheer stress and centrifugal force to a reactant in a rotating reactor. The mass ratio between the lithium titanate crystal structure and carbon nanofiber is preferably between 75:25 and 85:15. The carbon nanofiber preferably has an external diameter of 10-30 nm and an external specific surface area of 150-350 cm2/g. This composite is mixed with a binder and then molded to obtain an electrode, and this electrode is employed for an electrochemical element.Type: GrantFiled: May 2, 2011Date of Patent: April 14, 2015Assignee: Nippon Chemi-Con CorporationInventors: Katsuhiko Naoi, Wako Naoi, Shuichi Ishimoto, Kenji Tamamitsu
-
Patent number: 9005810Abstract: A cathode active material having a composition represented by the following formula (1) LiMn1?xMxP1?ySiyO4??(1) wherein M is at least one kind of element selected from the group consisting of Zr, Sn, Y and Al; x is within a range of 0<x?0.5; and y is within a range of 0<y?0.5.Type: GrantFiled: June 27, 2011Date of Patent: April 14, 2015Assignee: Sharp Kabushiki KaishaInventors: Koji Ohira, Motoaki Nishijima
-
Publication number: 20150099175Abstract: The present invention provides an electrode material in which unevenness in a supporting amount of a carbonaceous film is less when using an electrode-active material having a carbonaceous film on a surface thereof as the electrode material, and which is capable of improving conductivity, and a method for producing the electrode material. The electrode material includes an aggregate formed by aggregating an electrode-active material in which a carbonaceous film is formed on a surface. In the electrode material, an average particle size of the aggregate is 0.5 to 100 ?m, a volume density of the aggregate is 50 to 80 vol % of a volume density in a case in which the aggregate is a solid, and 80% or more of the surface of the electrode-active material is covered with the carbonaceous film. Alternatively, the electrode material includes an aggregate formed by aggregating electrode-active material particles in which a carbonaceous film is formed on a surface.Type: ApplicationFiled: December 11, 2014Publication date: April 9, 2015Applicant: SUMITOMO OSAKA CEMENT CO., LTD.Inventors: Takao KITAGAWA, Hirofumi YASUMIISHI, Masaru UEHARA
-
Publication number: 20150099188Abstract: Set forth herein are garnet material compositions, e.g., lithium-stuffed garnets and lithium-stuffed garnets doped with alumina, which are suitable for use as electrolytes and catholytes in solid state battery applications. Also set forth herein are lithium-stuffed garnet thin films having fine grains therein. Disclosed herein are novel and inventive methods of making and using lithium-stuffed garnets as catholytes, electrolytes and/or anolytes for all solid state lithium rechargeable batteries. Also disclosed herein are novel electrochemical devices which incorporate these garnet catholytes, electrolytes and/or anolytes. Also set forth herein are methods for preparing novel structures, including dense thin (<50 um) free standing membranes of an ionically conducting material for use as a catholyte, electrolyte, and, or, anolyte, in an electrochemical device, a battery component (positive or negative electrode materials), or a complete solid state electrochemical energy storage device.Type: ApplicationFiled: October 7, 2014Publication date: April 9, 2015Inventors: Tim Holme, Niall Donnelly
-
Publication number: 20150099185Abstract: Lithium ion batteries, electrodes, nanofibers, and methods for producing same are disclosed herein. Provided herein are batteries having (a) increased energy density; (b) decreased pulverization (structural disruption due to volume expansion during lithiation/de-lithiation processes); and/or (c) increased lifetime. In some embodiments described herein, using high throughput, water-based electrospinning process produces nanofibers of high energy capacity materials (e.g., ceramic) with nanostructures such as discrete crystal domains, mesopores, hollow cores, and the like; and such nanofibers providing reduced pulverization and increased charging rates when they are used in anodic or cathodic materials.Type: ApplicationFiled: February 28, 2013Publication date: April 9, 2015Applicant: CORNELL UNIVERSITYInventors: Yong Lak Joo, Nathaniel S. Hansen, Daehwan Cho, Kyoung Woo Kim
-
Patent number: 8999583Abstract: A lithium-ion secondary battery allowed to improve cycle characteristics and initial charge-discharge characteristics is provided. The lithium-ion secondary battery includes a cathode; an anode; and an electrolytic solution. The anode includes an anode active material layer including a plurality of anode active material particles. The anode active material particles each include a core section and a coating section applied to a part or a whole of a surface of the core section, and the core section includes a silicon-based material (SiOx: 0?x<0.5) and the coating section includes an amorphous or low-crystalline silicon-based material (SiOy: 0.5?y?1.8).Type: GrantFiled: December 16, 2010Date of Patent: April 7, 2015Assignee: Sony CorporationInventors: Takakazu Hirose, Kenichi Kawase, Takashi Fujinaga, Masaharu Senoue, Motoki Endo, Masayuki Iwama
-
Patent number: 8999550Abstract: An energy storage device includes a nanostructured network and an electrolyte in contact with the nanostructured network. The nanostructured network is an electrically conducting nanostructured network that provides combined functions of an electrode and a charge collector of the energy storage device. An electrical device includes an energy storage device that includes a nanostructured network and an electrolyte in contact with the nanostructured network, and a load-bearing electrical circuit electrically connected to the electrical energy storage device. The energy storage device is suitable to power the electrical device while in operation.Type: GrantFiled: October 9, 2009Date of Patent: April 7, 2015Assignee: The Regents of the University of CaliforniaInventors: George Gruner, Martti Kaempgen, Andreas Kiebele
-
Patent number: 8999576Abstract: A cathode active material of the present invention is a cathode active material having a composition represented by General Formula (1) below, LiFe1-xMxP1-ySiyO4??(1), where: an average valence of Fe is +2 or more; M is an element having a valence of +2 or more and is at least one type of element selected from the group consisting of Zr, Sn, Y, and Al; the valence of M is different from the average valence of Fe; 0<x?0.5; and y=x×({valence of M}?2)+(1?x)×({average valence of Fe}?2). This provides a cathode active material that not only excels in terms of safety and cost but also can provide a long-life battery.Type: GrantFiled: May 20, 2010Date of Patent: April 7, 2015Assignee: Sharp Kabushiki kaishaInventors: Koji Ohira, Motoaki Nishijima, Toshitsugu Sueki, Shogo Esaki, Isao Tanaka, Yukinori Koyama, Katsuhisa Tanaka, Koji Fujita, Shunsuke Murai
-
Patent number: 8999582Abstract: A composition including (a) a lithiated oxide of transition metals containing at least nickel, cobalt and aluminum and (b) a lithiated phosphate of at least one transition metal, the surface of which is at least partially covered by a layer of carbon. In the composition, the proportion by mass of the lithiated oxide of transition metals containing at least nickel, cobalt and aluminum is less than or equal to 10% of the weight of the composition, and the proportion by mass of the lithiated phosphate of at least one transition metal is greater than or equal to 90% of the weight of the composition. A lithium-ion or lithium-polymer type accumulator including at least one positive electrode containing this composition.Type: GrantFiled: June 23, 2010Date of Patent: April 7, 2015Assignee: SAFT Groupe SAInventors: Cecile Tessier, Julien Breger, Olivier Jan, Philippe Biensan, Bridget Deveney, Kamen Nechev
-
Patent number: 8999578Abstract: A positive electrode active material for a lithium secondary battery, the material represented by the formulas: LiNi(1-x-y)CoxAlyO2 or LiNi(1-x-y)CoxMnyO2 (0.1<x?0.15 and 0.03<y<0.1), and whose X-ray diffraction peak intensity ratio 1(2?=45 degrees)/I(2?=18 degrees) of an X-ray diffraction peak intensities found in the vicinity of an X-ray diffraction-scanning angle 2? of about 45 degrees, to an X-ray diffraction peak intensity found in the vicinity of an X-ray diffraction-scanning angle 2? of about 18 degrees, is in the range of from 46% to 51%. The positive electrode active material is fabricated by mixing Ni(1-x-y)CoxAlyO2 or Ni(1-x-y)CoxMnyO2 (0.1<x?0.15 and 0.03<y<0.1) with lithium hydrates (LiOH.H2O); and calcinating the mixture at a temperature of 750° C., for more than 30 hrs, under an oxygen atmosphere.Type: GrantFiled: July 15, 2008Date of Patent: April 7, 2015Assignee: Samsung SDI Co., Ltd.Inventors: Jungjoon Park, Suho Song
-
Patent number: 8999584Abstract: A Li-ion battery is disclosed, the Li-ion battery including an anode, a cathode, a lithium donor formed from a Li-containing material, and an electrolyte in communication with the anode, the cathode, and the lithium donor. The lithium donor may be incorporated into the anode, incorporated into the cathode, a layer formed on either an anode side or a cathode side of a separator of the battery. The lithium donor is formed from Li-containing material insensitive to oxygen and aqueous moisture.Type: GrantFiled: March 15, 2013Date of Patent: April 7, 2015Assignee: GM Global Technology Operations LLCInventors: Meng Jiang, Xingcheng Xiao, Mei Cai, Li Yang, Bob R. Powell, Jr.
-
Publication number: 20150093640Abstract: An electrode material that is used as an electrode in an electric double layer capacitor, a lithium ion capacitor, and a lithium secondary battery and has a reduced internal resistance for improving output is provided. The electrode material is characterized in that a metal is filled into pores in a surface portion at one surface of a powder molded body containing at least an active material powder and a metal film is formed on the one surface. The electrode material can be formed by performing a plating treatment on the powder molded body.Type: ApplicationFiled: March 19, 2013Publication date: April 2, 2015Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Masatoshi Majima, Akihisa Hosoe, Junichi Nishimura, Kazuki Okuno, Kotaro Kimura, Kengo Goto, Hideaki Sakaida
-
Publication number: 20150093641Abstract: Provided is a lithium metal compound oxide having a layered structure, which is very excellent as a positive electrode active material of a battery that is mounted on, particularly, an electric vehicle or a hybrid vehicle. Suggested is a lithium metal compound oxide having a layered structure which is expressed by general formula of Li1+xM1?xO2 (M represents metal elements including three elements of Mn, Co, and Ni). In the lithium metal compound oxide having a layered structure, D50 is more than 4 ?m and less than 20 ?m, a ratio of a primary particle area to a secondary particle area of secondary particles having a size corresponding to the D50 (“primary particle area/secondary particle area”) is 0.004 to 0.035, and the minimum value of powder crushing strength that is obtained by crushing a powder using a microcompression tester is more than 70 MPa.Type: ApplicationFiled: April 16, 2013Publication date: April 2, 2015Inventors: Tetsuya Mitsumoto, Hitohiko Ide, Shinya Kagei, Yoshimi Hata
-
Patent number: 8993168Abstract: Disclosed is a powder comprising a lithium-containing compound and a nickel-containing mixed metal compound, and satisfying the following requirements of (1) and (2) when the powder is analyzed by plasma emission spectrometry of particles: (1) an absolute deviation of a synchronous distribution chart against an approximated straight-line is 0.10 or less, wherein the approximated straight-line is evaluated from a synchronous distribution chart obtained by plotting an emission intensity of lithium and an emission intensity of nickel of each particle composing of the powder, and (2) a release rate of lithium evaluated by the following formula is 80 or less: Release rate of lithium=(nb/na)×100 wherein, na is the number of particles containing lithium in the powder, and nb is the number of particles containing lithium and not containing nickel in the powder.Type: GrantFiled: June 3, 2010Date of Patent: March 31, 2015Assignee: Sumitomo Chemical Company, LimitedInventors: Satoshi Shimano, Kensaku Horie, Toshinori Isobe
-
Patent number: 8993163Abstract: A positive electrode active material provided by the present invention is formed of a lithium-nickel-containing metal phosphate compound represented by a general formula: LiNi(1-x)MxPO4(1) (in Formula (1), M is one or more metal elements selected from divalent and trivalent metal elements, and x is a number satisfying the condition 0<x<0.5). At least part of a surface of the lithium-nickel-containing metal phosphate compound is covered with carbon, and the lithium-nickel-containing metal phosphate compound covered with carbon has an olivine-type crystal structure confirmed by structure analysis by X-ray diffraction.Type: GrantFiled: July 31, 2009Date of Patent: March 31, 2015Assignee: Toyota Jidosha Kabushiki KaishaInventor: Jun Yoshida
-
Publication number: 20150086881Abstract: A unitary graphene-based current collector in a battery or capacitor. The current collector is or contains a unitary graphene layer that is composed of closely packed and chemically bonded parallel graphene planes having an inter-graphene plane spacing of 0.335 to 0.40 nm and an oxygen content less than 5% by weight (more typically 0.001% to 1%), an average grain size larger than 5 ?m (more typically >100 ?m; some as large as >cm), a physical density higher than 1.8 g/cm3, and is obtained from heat-treating a graphene oxide gel at a temperature higher than 100° C. (typically and preferably from 1,000 to 3,000° C.). Such an integrated or unitary graphene entity is compatible with essentially all electrolytes commonly used in batteries and supercapacitors.Type: ApplicationFiled: September 23, 2013Publication date: March 26, 2015Inventors: Aruna Zhamu, Bor Z. Jang, Guorong Chen
-
Patent number: 8986889Abstract: A positive active material for a lithium secondary battery comprises a core comprising a compound that can reversibly intercalate and deintercalate lithium; and a compound attached to the surface of the core and represented by Chemical Formula 1: Li1+xM(I)xM(II)2?xSiyP3?yO12,??[Chemical Formula 1] wherein M(I) and M(II) are selected from the group consisting of Al, Zr, Hf, Ti, Ge, Sn, Cr, Nb, Ga, Fe, Sc, In, Y, La, Lu, and Mg, and 0<x?0.7, 0?y?1.Type: GrantFiled: November 16, 2011Date of Patent: March 24, 2015Assignee: Samsung SDI Co., Ltd.Inventors: Joon-Hyung Lee, Andriy Kvasha, Oleg Levin
-
Patent number: 8986890Abstract: A cathodal material for lithium cells comprises a porous lithium oxide microparticle is provided. The porous lithium oxide microparticle comprises a plurality of porous lithium oxide nanoparticles formed with a first conductive layer therein, a pore defined by connecting the lithium oxide nanoparticles, a second conductive layer covering at least a surface of one of the lithium oxide nanoparticles contacting the first conductive layer and forming a three-dimensional conductive network between the lithium oxide nanoparticles, and a conductive fiber connecting with the second conductive layer.Type: GrantFiled: April 14, 2008Date of Patent: March 24, 2015Assignee: Industrial Technology Research InstituteInventors: Jin-Ming Chen, Chia-Haw Hsu, Yu-Run Lin, Mei-Hui Hsiao, Tu Chen
-
Patent number: 8980461Abstract: The present disclosure relates to a separator and a lithium secondary battery including the same. The separator comprises a polyethylene-based powder or a polypropylene-based powder provided on or in the base film, wherein the polyethylene-based powder or the polypropylene-based powder is different from the base film.Type: GrantFiled: May 4, 2011Date of Patent: March 17, 2015Assignee: Samsung SDI Co., Ltd.Inventors: Seonghoon Han, Changbum Ahn
-
Patent number: 8980477Abstract: The present invention is a secondary battery having a high specific capacity and good cycleability, and that can be used safely. The secondary battery is manufactured to include an anode formed from a host material capable of absorbing and desorbing lithium in an electrochemical system such as a carbonaceous material, and lithium metal dispersed in the host material. The anodes of the invention are combined with a cathode including an active material, a separator that a separates the cathode and the anode, and an electrolyte in communication with the cathode and the anode. The present invention also includes a method of preparing an anode and a method of operating a secondary battery including the anode of the invention.Type: GrantFiled: December 20, 2002Date of Patent: March 17, 2015Assignee: FMC CorporationInventors: Yuan Gao, John L. Burba, III, John F. Engel, Marina V. Yakovleva
-
Patent number: 8980125Abstract: An active material for a nonaqueous electrolyte secondary battery includes first particles and second particles provided to coat the first particles so as to be scattered on the surfaces of the first particles. The circularity of the first particles coated with the second particles is 0.800 to 0.950, and the ratio r1/r2 of the average particle diameter r1 of the second particles to the average particle diameter r2 of the first particles is 1/20 to 1/2.Type: GrantFiled: April 23, 2010Date of Patent: March 17, 2015Assignee: Sony CorporationInventor: Kazuaki Endoh
-
Publication number: 20150072236Abstract: Using metal foams for the electrode of secondary lithium battery, preparing method thereof, and secondary lithium battery including the metal foam. A metal foam is used in an electrode of secondary lithium battery where the surface and the inner pore walls are coated with the active materials, a method of manufacturing such metal foam, and secondary lithium battery including the metal foam.Type: ApplicationFiled: April 18, 2014Publication date: March 12, 2015Inventors: Ji Hyun Um, Hyeji Park, Myounggeun Choi, Hyelim Choi, Yong-Hun Cho, Yung-Eun Sung, Heeman Choe
-
Patent number: 8974963Abstract: A lithium secondary battery includes: a positive electrode that contains a positive electrode active material; a negative electrode; and a nonaqueous electrolyte. The positive electrode active material is amorphous and is expressed by LixA[PaM1-a]yOz where, in the formula, A is Mn or Ni; M is a glass former element having an electronegativity lower than P; and x, y, a and z respectively satisfy 1<x?2.5, 0<y?3, 0?a<1 and z=(x+(valence of A)+(valence of P)×a×y+(valence of M)×(1?a)×y)/2.Type: GrantFiled: September 30, 2010Date of Patent: March 10, 2015Assignees: Toyota Jidosha Kabushiki Kaisha, Kyushu University, National University CorporationInventors: Motoshi Isono, Shigeto Okada, Jun-ichi Yamaki
-
Patent number: 8974970Abstract: Provided is a lithium transition metal oxide having an ?-NaFeO2 layered crystal structure, as a cathode active material for lithium secondary battery, wherein the transition metal includes a blend of Ni and Mn, an average oxidation number of the transition metals except lithium is +3 or higher, and the lithium transition metal oxide satisfies Equations 1 and 2: 1.0<m(Ni)/m(Mn)??(1) m(Ni2+)/m(Mn4+)<1??(2) wherein m(Ni)/m(Mn) represents a molar ratio of nickel to manganese and m (Ni2+)/m (Mn4+) represents a molar ratio of Ni2+ to Mn4+. The cathode active material of the present invention has a uniform and stable layered structure through control of oxidation number of transition metals to a level higher than +3, in contrast to conventional cathode active materials, thus advantageously exerting improved overall electrochemical properties including electric capacity, in particular, superior high-rate charge/discharge characteristics.Type: GrantFiled: June 19, 2014Date of Patent: March 10, 2015Assignee: LG Chem, Ltd.Inventors: Sung-Kyun Chang, Hong-Kyu Park, Sinyoung Park, Hyo-shik Kil, Hera Lee
-
Patent number: 8974945Abstract: An electricity supply system includes a circuit substrate, a first electrode substrate, a second electrode substrate, a first package unit, and a second package unit. The circuit substrate includes at least a separating area. The first electrode substrate includes a first current collector and a first active material layer, which is disposed opposed to the separating area and is located between the separating area and the first current collector. The second electrode substrate includes a second current collector and a second active material layer, which is disposed opposed to the separating area and is located between the separating area and the second current collector. The first and second package units are located between the first electrode substrate, the second electrode substrate and the circuit substrate respectively.Type: GrantFiled: December 13, 2011Date of Patent: March 10, 2015Assignees: Prologium Technology, Co., Ltd., Prologium Holding Inc.Inventor: Szu-Nan Yang
-
Patent number: 8974946Abstract: A battery with a sulfur-containing cathode, an anode, and a separator between the cathode and the anode has a coating comprising a single-lithium ion conductor on at least one of the cathode or the separator.Type: GrantFiled: March 15, 2013Date of Patent: March 10, 2015Assignee: GM Global Technology OperationsInventors: Mei Cai, Mark W. Verbrugge, Xiaosong Huang, Li Yang
-
Patent number: 8974971Abstract: A positive electrode for a rechargeable lithium ion battery includes a mixture layer including a positive-electrode active material, a conducting agent, and a binder and a collector having the mixture layer formed on the surface thereof. The positive-electrode active material is a composite oxide having an olivine structure expressed by a formula LiaMxPO4 (where M represents a transition metal including at least one of Fe and Mn and a and x satisfy 0<a?1.1 and 0.9?x?1.1). The conducting agent includes fibrous carbon. A carbon coating layer is formed on the surface of the collector. A part of the positive-electrode active material and a part of the fibrous carbon enter pits formed in the carbon coating layer.Type: GrantFiled: July 30, 2012Date of Patent: March 10, 2015Assignee: Hitachi, Ltd.Inventors: Toyotaka Yuasa, Mitsuru Kobayashi, Sai Ogawa, Masanari Oda, Kan Kitagawa
-
Publication number: 20150064567Abstract: A method for forming a rough silicon wafer including the successive steps of: performing a plasma etching of a surface of the wafer in conditions suitable to obtain a rough structure, and performing two successive ion milling steps, one at an incidence in the range of 0 to 10°, the other at an incidence in the range of 40 to 60° relative to the normal to the wafer.Type: ApplicationFiled: August 27, 2014Publication date: March 5, 2015Inventors: Mohamed BOUFNICHEL, Jean-Christophe HOUDBERT
-
Publication number: 20150064557Abstract: Provided are a cathode active material including lithium transition metal phosphate particles, wherein the lithium transition metal phosphate particles include a first secondary particle formed by agglomeration of two or more first primary particles, and a second secondary particle formed by agglomeration of two or more second primary particles in the first secondary particle, and a method of preparing the same. Since the cathode active material according to an embodiment of the present invention may include first primary particles and second primary particles having different average particle diameters, the exfoliation of the cathode active material from a cathode collector may be minimized and performance characteristics, such as high output characteristics and an increase in available capacity, of a secondary battery may be further improved. In addition, since the first secondary particles are porous, the secondary particles are collapsed and fractured due to rolling when used in a cathode.Type: ApplicationFiled: October 21, 2014Publication date: March 5, 2015Applicant: LG Chem, Ltd.Inventors: Ji Hye Kim, Wang Mo Jung, Sang Seung Oh, Byung Chun Park, Sung Bin Park
-
Publication number: 20150064566Abstract: Provided is a method for manufacturing a lithium secondary battery which is capable of preventing a local deposition of a metallic foreign substance at a negative electrode regardless of the type of a positive electrode and in which a short-circuit is less likely to occur. The present manufacturing method comprises: a step of assembling a cell that includes a positive electrode, a negative electrode, and a nonaqueous electrolyte; a micro charging step of performing a micro charge on the assembled cell before performing an initial conditioning charge until a positive electrode potential with respect to a metal lithium (Li) reference electrode exceeds an Me dissolution potential set in advance at which a mixing-anticipated metal species (Me) starts to dissolve; and an Me dissolution potential holding step of holding the positive electrode potential of the cell at or above the Me dissolution potential for a prescribed period of time after the micro charge.Type: ApplicationFiled: September 8, 2011Publication date: March 5, 2015Inventors: Hisataka Fujimaki, Shinya Kamada, Shinya Kuroki, Hideto Mori, Hisanao Kojima
-
Patent number: 8968935Abstract: A lithium ion secondary battery having more superior cycle characteristics is provided. The lithium ion secondary battery includes a cathode, an anode, and an electrolyte. The anode has an anode active material layer in which a first layer containing silicon as an anode active material, and a second layer containing silicon and a metal element as an anode active material are alternately layered on an anode current collector. At least one of a lamellar oxide-containing region and a lamellar nitrogen-containing region is inserted in at least one of the first layer and the second layer.Type: GrantFiled: January 28, 2011Date of Patent: March 3, 2015Assignee: Sony CorporationInventors: Shunsuke Kurasawa, Kenichi Kawase, Takashi Fujinaga
-
Patent number: 8968936Abstract: The present invention provides a method for producing a lithium-containing composite oxide represented by general formula (1) below, the method at least including a step of preparing a solution by dissolving a lithium source, an element M source, a phosphorus source, and an element X source that serve as source materials in a solvent, the phosphorus source being added after at least the element M source is dissolved; a step of gelating the resulting solution; and a step of calcining the resulting gel: LixMyP1-zXzO4??(1) (where M represents at least one element selected from the group consisting of Fe, Ni, Mn, Zr, Sn, Al, and Y; X represents at least one element selected from the group consisting of Si and Al; and 0<x?2, 0.8?y?1.2, 0?z?1). According to the present invention, a positive electrode active material for lithium secondary batteries that offers high safety and high cost efficiency and are capable of extending battery life can be provided.Type: GrantFiled: June 1, 2011Date of Patent: March 3, 2015Assignee: Sharp Kabushiki KaishaInventors: Motoaki Nishijima, Koji Ohira, Toshitsugu Sueki, Shougo Esaki, Isao Tanaka, Yukinori Koyama, Katsuhisa Tanaka, Koji Fujita, Shunsuke Murai
-
Patent number: 8968932Abstract: A compound having a high reduction resistance and being capable of sufficiently performing a function as an electronic conductive additive when added to a positive electrode active material as an electronic conductive additive is provided. In a method for producing a cobalt cerium compound including a step of depositing a hydroxide containing cobalt and cerium in an aqueous solution containing cobalt ions and cerium ions by changing the pH of the aqueous solution and thereafter performing a treatment of oxidizing the hydroxide, the ratio of the cerium ions contained in the aqueous solution containing the cobalt ions and the cerium ions is set to be more than 5% by atom and 70% by atom or less with respect to the sum of the cobalt ions and the cerium ions before the hydroxide is deposited.Type: GrantFiled: July 16, 2010Date of Patent: March 3, 2015Assignees: GS Yuasa International Ltd., National Institute of Advanced Industrial Science and TechnologyInventors: Masanori Morishita, Tadashi Kakeya, Seijiro Ochiai, Aki Nakashima, Yoshiteru Kawabe, Tetsuo Sakai
-
Publication number: 20150056516Abstract: Lithium ion battery electrodes including graphenic carbon particles are disclosed. Lithium ion batteries containing such electrodes are also disclosed. The graphenic carbon particles may be used in cathodes of such batteries by depositing a graphenic carbon particle-containing coating of a conductive substrate such as a metal foil The use of graphenic carbon particles in the cathodes results in improved performance of the lithium ion batteries.Type: ApplicationFiled: October 31, 2014Publication date: February 26, 2015Inventors: Stuart D. Hellring, Randy E. Daughenbaugfh, Noel R. Vanier, Cheng-Hung Hung, John W. Burgman