Manganese Component Is Active Material Patents (Class 429/224)
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Publication number: 20150010820Abstract: According to one embodiment, there is provided an active material including monoclinic niobium titanium composite oxide particles and a carbon material layer. The monoclinic niobium titanium composite oxide particles can absorb and release Li ions or Na ions and satisfy Formula (1) below. The carbon material layer covers at least a part of surfaces of the niobium titanium composite oxide particles and satisfies Formula (2) below: 0.5?(?/?)?2??(1) 0?(?/?)?0.Type: ApplicationFiled: July 8, 2014Publication date: January 8, 2015Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Norio Takami, Yasuhiro Harada, Kazuki Ise, Yorikazu Yoshida
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Publication number: 20150010822Abstract: The present invention relates to a lithium-ion battery comprising a positive electrode containing, as a principal component, a lithium oxide having a layered rock-salt structure and represented by chemical formula: LixM1yM2zO2-d, wherein 1.16?x?1.32, 0.33?y?0.63, 0.06?z?0.50, M1 represents a metal ion selected from Mn, Ti and Zr, or a mixture thereof, and M2 represents a metal ion selected from Fe, Co, Ni and Mn, or a mixture thereof; and a negative electrode containing, as a principal component, a material capable of intercalating/deintercalating lithium ions, wherein an oxygen deficiency (d) of the positive electrode is not less than 0.05 and not more than 0.20.Type: ApplicationFiled: February 1, 2013Publication date: January 8, 2015Inventors: Kentaro Nakahara, Sadanori Hattori
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Publication number: 20150010818Abstract: A rechargeable lithium battery that includes: a negative electrode including a negative active material, and a positive electrode including a positive active material and activated carbon. When the positive active material includes a lithium nickel-based oxide, a lithium cobalt-based oxide, a lithium manganese-based oxide, a lithium titanium-based oxide, a lithium nickel manganese-based oxide, a lithium nickel cobalt manganese-based oxide, a lithium nickel cobalt aluminum-based oxide, or a combination thereof, the average particle diameter of the activated carbon is greater than about 100% and less than about 1000% of the average particle diameter of the positive active material. When the positive active material includes a lithium iron phosphate-based compound, the average particle diameter of the activated carbon is greater than or equal to about 1000% and less than or equal to about 3000% of the average particle diameter of the positive active material.Type: ApplicationFiled: November 27, 2013Publication date: January 8, 2015Applicant: Samsung SDI Co., Ltd.Inventors: Jung-Woo An, Sumihito Ishida, Joon-Kil Son
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Publication number: 20150010832Abstract: The invention relates to Chevrel-phase materials and methods of preparing these materials utilizing a precursor approach. The Chevrel-phase materials are useful in assembling electrodes, e.g., cathodes, for use in electrochemical cells, such as rechargeable batteries. The Chevrel-phase materials have a general formula of Mo6Z8 and the precursors have a general formula of MxMo6Z8. The cathode containing the Chevrel-phase material in accordance with the invention can be combined with a magnesium-containing anode and an electrolyte.Type: ApplicationFiled: July 8, 2014Publication date: January 8, 2015Applicant: UNIVERSITY OF PITTSBURGH - OF THE COMMONWEALTH SYSTEM OF HIGHER EDUCATIONInventors: Prashant N. Kumta, Partha Saha, Moni Kanchan Datta, Ayyakkannu Manivannan
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Publication number: 20150004472Abstract: Lithium-rich compounds that are precursors for positive electrodes for lithium cells and batteries comprise a Li2O-containing compound as one component, and a second charged or partially-charged component, selected preferably from a metal oxide, a lithium-metal-oxide, a metal phosphate or metal sulfate compound. Li2O is extracted from the electrode precursors to activate the electrode either by electrochemical methods or by chemical methods. Methods for synthesizing and activating the electrodes, electrochemical cells, and batteries containing such electrodes also are described.Type: ApplicationFiled: August 8, 2014Publication date: January 1, 2015Applicant: UCHICAGO ARGONNE, LLCInventors: Michael M. THACKERAY, Christopher S. JOHNSON, Sun-Ho KANG
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Publication number: 20150004493Abstract: Disclosed are an electrode assembly including a cathode, an anode, and a separator disposed between the cathode and the anode Wherein the anode includes lithium titanium oxide (LTO) as an anode active material and the separator is a non-woven separator, and a lithium secondary battery including the same.Type: ApplicationFiled: September 18, 2014Publication date: January 1, 2015Applicant: LG CHEM, LTD.Inventors: Daehong Kim, Youn Kyoung Lee, Soo Hyun Lim, Tae Jin Park
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Publication number: 20150003033Abstract: 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: ApplicationFiled: June 27, 2013Publication date: January 1, 2015Inventors: Yang Liu, Priyanka Pande, Bum Ki Moon, Michael C. Graf, Donald S. Gardner, Nicolas Cirigliano, Shanthi Murali, Zhaohui Chen
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Publication number: 20150004487Abstract: Disclosed is an electrode for secondary batteries including an electrode mixture including an electrode active material, binder and conductive material coated on a current collector wherein a conductive material is coated to a thickness of 1 to 80 ?m on the current collector and the electrode mixture is coated on a coating layer of the conductive material so as to improve electrical conductivity.Type: ApplicationFiled: September 18, 2014Publication date: January 1, 2015Applicant: LG Chem, Ltd.Inventors: Min Hee Lee, Tae Jin Park, Daehong Kim
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Patent number: 8920969Abstract: An alkaline electrochemical cell having an anode including electrochemically active anode material, a cathode including electrochemically active cathode material, a separator between the anode and the cathode, and an electrolyte. The electrolyte includes a hydroxide dissolved in water. The separator in combination with the electrolyte has an initial area-specific resistance between about 100 mOhm-cm2 and about 220 mOhm-cm2.Type: GrantFiled: December 5, 2012Date of Patent: December 30, 2014Assignee: The Gillette CompanyInventors: Nikolai Nikolaevich Issaev, James Joseph Cervera, Michael Pozin
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Patent number: 8920974Abstract: Disclosed is a cathode material comprising a mixture of an oxide powder (a) defined herein and an oxide powder (b) selected from the group consisting of an oxide powder (b1) defined herein and an oxide powder (b2) defined herein and a combination thereof wherein a mix ratio of the two oxide powders (oxide powder (a):oxide powder (b)) is 50:50 to 90:10. The cathode material uses a combination of an oxide powder (a) and 50% or less of an oxide powder (b) which can exert high capacity, high cycle stability, superior storage stability and high-temperature stability, thus advantageously exhibiting high energy density and realizing high capacity batteries.Type: GrantFiled: November 4, 2013Date of Patent: December 30, 2014Assignee: LG Chem, Ltd.Inventors: Suengeun Choi, Eunyoung Goh, Hyang Mok Lee, Heegyoung Kang, Sangbaek Ryu, Kiwoong Kim
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Patent number: 8920973Abstract: A positive electrode active material for nonaqueous electrolyte secondary batteries includes a coating layer containing at least nickel (Ni) and/or manganese (Mn) on the surface of a complex oxide particle containing lithium (Li) and cobalt (Co), wherein a binding energy value obtained by analysis of a surface state by an ESCA surface analysis on the surface of the coating layer is 642.0 eV or more and not more than 642.5 eV in an Mn2p3 peak, and a peak interval of Co—Mn is 137.6 eV or more and not more than 138.0 eV.Type: GrantFiled: December 2, 2009Date of Patent: December 30, 2014Assignee: Sony CorporationInventor: Yuki Takei
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Patent number: 8920976Abstract: A nonaqueous electrolyte secondary battery disclosed in the present application includes: a positive electrode capable of absorbing and releasing lithium, containing a positive electrode active material composed of a lithium-containing transition metal oxide having a layered crystalline structure; and a negative electrode capable of absorbing and releasing lithium, containing a negative electrode active material composed of a lithium-containing transition metal oxide obtained by substituting some of Ti element of a lithium-containing titanium oxide having a spinel crystalline structure with one or more element different from Ti, wherein a retention of the negative electrode is set to be greater than a retention of the positive electrode, and an irreversible capacity rate of the negative electrode is set to be greater than an irreversible capacity rate of the positive electrode, whereby a discharge ends by negative electrode limitation.Type: GrantFiled: April 18, 2012Date of Patent: December 30, 2014Assignee: Panasonic CorporationInventors: Natsumi Goto, Takashi Takeuchi, Masaki Hasegawa
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Publication number: 20140377656Abstract: Disclosed is a lithium secondary battery including an electrode assembly including a cathode, an anode, and a separator disposed between the cathode and the anode and an electrolyte, wherein the anode includes a lithium titanium oxide (LTO) as an anode active material, and the lithium secondary battery has a charge cut-off voltage of 3.3 to 4 V and, when the charge cut-off voltage is reached, the anode has a potential of 0.75 to 1.545 V within a range within which a potential of the cathode does not exceed 4.95 V.Type: ApplicationFiled: September 5, 2014Publication date: December 25, 2014Inventors: Soo Hyun LIM, Jae Hyun LEE, Jihyun KIM
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Publication number: 20140377657Abstract: Disclosed is a lithium secondary battery including: an electrode assembly including a cathode including a cathode mixture layer formed on a cathode current collector, an anode including an anode mixture layer formed on an anode current collector, and a separator disposed between the cathode and the anode; and an electrolyte, wherein the anode includes lithium titanium oxide (LTO) as an anode active material, and four planes of the cathode mixture layer have the same or greater length than four planes of the anode mixture layer and thus the cathode mixture layer has the same or greater area than the anode mixture layer.Type: ApplicationFiled: September 10, 2014Publication date: December 25, 2014Applicant: LG Chem, Ltd.Inventors: Soo Hyun Lim, Jae Hyun Lee, Jihyun Kim
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Publication number: 20140377655Abstract: A composite cathode active material, a method of preparing the composite cathode active material, a cathode including the composite cathode active material, and a lithium battery including the cathode. The composite cathode active material includes a lithium intercalatable material; and a garnet oxide, wherein an amount of the garnet oxide is about 1.9 wt % or less, based on a total weight of the composite cathode active material.Type: ApplicationFiled: April 25, 2014Publication date: December 25, 2014Applicant: Samsung Electronics Co., Ltd.Inventors: Jun-young MUN, Jae-myung LEE, Gue-sung KIM, Yoon-sok KANG, Myung-hoon KIM, Jun-ho PARK, Jin-hwan PARK, Jae-gu YOON, Byung-jin CHOI
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Publication number: 20140377659Abstract: Disclosed herein are cathode formulations comprising a lithium ion-based electroactive material having a D50 ranging from 1 ?m to 6 ?m; and carbon black having BET surface area ranging from 130 to 700 m2/g and an OAN ranging from 150 mL/100 g to 300 mL/100 g. Also disclosed are cathode formulations comprising a first lithium ion-based electroactive material having a particle size distribution of 1 ?m?D50?5 ?m, and a second lithium ion-based electroactive material having a particle size distribution of 5 ?m<D50?15 ?m. Cathodes comprising these active materials can exhibit a maximum pulse power in W/kg and W/L of the mixture higher than maximum pulse power of the first or second electroactive material individually, or an energy density in Wh/kg and Wh/L of the mixture higher than energy density of the first or second electroactive material individually. The cathode formulations can further comprise carbon black having BET surface area ranging from 130 to 700 m2/g.Type: ApplicationFiled: June 19, 2014Publication date: December 25, 2014Inventors: Miodrag Oljaca, Berislav Blizanac, Aurelien DuPasquier, Ryan C. Wall, Arek Suszko, Kenneth Koehlert
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Publication number: 20140377658Abstract: Disclosed is a method of manufacturing an electrode for a secondary battery including an electrode mixture including an electrode active material, binder and conductive material coated on a current collector. Provided are a method including surface-treating the current collector such that an aluminum oxide (Al2O3) layer of 40 nm or less is formed on the current collector so as to enhance adhesion between the electrode mixture and the current collector, and an electrode for a secondary battery manufactured using the same.Type: ApplicationFiled: September 11, 2014Publication date: December 25, 2014Applicant: LG Chem, Ltd.Inventors: Daehong Kim, Jae Hyun Lee, Tae Jin Park
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Patent number: 8916294Abstract: Lithium rich metal oxyfluorides are described with high specific capacity and, good cycling properties. The materials have particularly good high rate capabilities. The fluorine dopant can be introduced in a low temperature process to yield the materials with desirable cycling properties. In some embodiments, the positive electrode active materials have a composition represented approximately by the formula Li1+xNi?Mn?Co?A?O2?zFz where: x is from about 0.02 to about 0.19, ? is from about 0.1 to about 0.4, ? is from about 0.35 to about 0.869, ? is from about 0.01 to about 0.2, ? is from 0.0 to about 0.1 and z is from about 0.01 to about 0.2, where A is Mg, Zn, Al, Ga, B, Zr, Ti, Ca, Ce, Y, Nb or combinations thereof.Type: GrantFiled: September 29, 2009Date of Patent: December 23, 2014Assignee: Envia Systems, Inc.Inventors: Sujeet Kumar, Herman Lopez, Subramanian Venkatachalam, Deepak Karthikeyan
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Patent number: 8916295Abstract: The positive electrode active material includes a compound represented by the following composition formula: [Li1.5][Li0.5(1-x)Mn1-xM1.5x]O3 (wherein x satisfies 0.1?x?0.5, and M is represented by Ni?Co?Mn? in which ?, ? and ? satisfy 0<??0.5, 0???0.33 and 0<??0.5, respectively), wherein a half width of the peak of a (001) crystal plane of the compound measured by X-ray diffraction is in a range from 0.14 to 0.33 inclusive, and an average primary particle diameter of the compound is in a range from 0.03 ?m to 0.4 ?m inclusive.Type: GrantFiled: February 28, 2012Date of Patent: December 23, 2014Assignee: Nissan Motor Co., Ltd.Inventors: Atsushi Ito, Kenzo Oshihara, Yasuhiko Ohsawa
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Patent number: 8916296Abstract: The present application is directed to mesoporous carbon materials comprising bi-functional catalysts. The mesoporous carbon materials find utility in any number of electrical devices, for example, in lithium-air batteries. Methods for making the disclosed carbon materials, and devices comprising the same, are also disclosed.Type: GrantFiled: March 11, 2011Date of Patent: December 23, 2014Assignee: EnerG2 Technologies, Inc.Inventors: Aaron M. Feaver, Henry R. Costantino, Richard D. Varjian
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Publication number: 20140370360Abstract: A secondary battery includes a first electrode, a second electrode, an ion transmission member in contact with the first electrode and the second electrode, and a hole transmission member in contact with the first electrode and the second electrode. Suitably, the first electrode contains a composite oxide. The composite oxide contains alkali metal or alkali earth metal. The composite oxide contains a p-type composite oxide as a p-type semiconductor.Type: ApplicationFiled: June 25, 2013Publication date: December 18, 2014Inventors: Si MENGQUN, Zhou YING
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Publication number: 20140370386Abstract: Disclosed is a Si-based alloy anode material for lithium ion secondary batteries, including an alloy phase with a Si principal phase including Si and a compound phase including two or more elements, which includes a first additional element A selected from Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zr, Nb and Mg and a low-melting second additional element B selected from S, Se, Te, Sn, In, Ga, Pb, Bi, Zn, Al. This compound phase includes (i) a first compound phase including Si and the first additional element A; a second compound phase including the first additional element A and the second additional element B; and one or both of a third compound phase including two or more of the second additional elements B and a single phase of the second additional element B.Type: ApplicationFiled: January 30, 2013Publication date: December 18, 2014Inventors: Tomoki Hirono, Tetsuro Kariya, Toshiyuki Sawada
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Publication number: 20140370349Abstract: The present disclosure provides a sheet-form electrode for a secondary battery, comprising a current collector; an electrode active material layer formed on one surface of the current collector; and a first porous supporting layer formed on the electrode active material layer. The sheet-form electrode for a secondary battery according to the present disclosure has supporting layers on at least one surface thereof to exhibit surprisingly improved flexibility and prevent the release of the electrode active material layer from a current collector even if intense external forces are applied to the electrode, thereby preventing the decrease of battery capacity and improving the cycle life characteristic of the battery.Type: ApplicationFiled: August 29, 2014Publication date: December 18, 2014Applicant: LG Chem, Ltd.Inventors: Yo-Han Kwon, Hye-Ran Jung, Eun-Kyung Kim, Je-Young Kim, Hyo-Mi Kim
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Publication number: 20140370389Abstract: A positive electrode active material includes: center cores containing a composite oxide containing alkali metal or alkali earth metal; and eutectic layers containing a eutectic substance composed of at least two types of composite oxides containing the alkali metal or the alkali earth metal and configured to cover the center cores. Preferably, the eutectic layers have a thickness of 4 nm or larger and 800 nm or smaller. The composite oxides forming the eutectic substance include the composite oxide of the center cores.Type: ApplicationFiled: June 25, 2013Publication date: December 18, 2014Applicant: GREENFUL NEW ENERGY CO., LTD.Inventors: Si MENGQUN, Zhou YING
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Patent number: 8911902Abstract: A nickel (Ni)-based positive electrode active material, a method of preparing the same, and a lithium battery using the Ni-based positive electrode active material.Type: GrantFiled: May 6, 2011Date of Patent: December 16, 2014Assignee: Samsung SDI Co., Ltd.Inventors: Do-Hyung Park, Seon-Young Kwon, Min-Han Kim, Ji-Hyun Kim, Chang-Hyuk Kim, Jeong-Seop Lee, Yoon-Chang Kim
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Patent number: 8911901Abstract: The object of the present invention is to inhibit occurrence of structural collapse caused by volumetric change of primary particles of negative electrode active material and to improve adhesion between negative electrode active material and electrically conductive agent and between negative electrode mix layer and collector, whereby improvement of life is attained in negative electrode for non-aqueous secondary battery and non-aqueous secondary battery. In the negative electrode for non-aqueous secondary battery of the present invention, the negative electrode active material comprises silicon and/or tin, and at least one element selected from elements which do not react with lithium and has pores in both of the inner core portion and the outer peripheral portion of primary particles and a material which cures by a heat treatment is used as a binder.Type: GrantFiled: February 14, 2012Date of Patent: December 16, 2014Assignee: Hitachi, Ltd.Inventors: Takashi Nakabayashi, Shin Takahashi
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Patent number: 8911903Abstract: A cathode active material is provided. The cathode active material includes: a composite oxide particle including at least lithium and cobalt; a coating layer which is provided in at least a part of the composite oxide particle and includes an oxide including lithium and a coating element of at least one of nickel and manganese; and a surface layer which is provided in at least a part of the coating layer and includes at least one element selected from the group consisting of silicon, tin, phosphorus, magnesium, boron, zinc, tungsten, aluminum, titanium, and zirconium.Type: GrantFiled: July 2, 2007Date of Patent: December 16, 2014Assignee: Sony CorporationInventors: Haruo Watanabe, Tomoyo Ooyama, Masanori Soma, Kenji Ogisu
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Publication number: 20140363736Abstract: A lithium secondary battery of the present invention may simultaneously improve high output and high capacity characteristics by including a first active material layer having high output characteristics and a second active material layer having high capacity characteristics respectively on a cathode collector and an anode collector.Type: ApplicationFiled: August 26, 2014Publication date: December 11, 2014Applicant: LG CHEM, LTD.Inventors: Ji Sun Kim, Min Ho Youn, Dong Seok Shin, Hyo Seok Park
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Patent number: 8906557Abstract: Anode active materials and methods of preparing the same are provided. One anode active material includes a carbonaceous material capable of improving battery cycle characteristics. The carbonaceous material bonds to and coats metal active material particles and fibrous metallic particles to suppress volumetric changes.Type: GrantFiled: March 22, 2007Date of Patent: December 9, 2014Assignee: Samsung SDI Co., Ltd.Inventors: Gue-sung Kim, Yong-nam Ham, Han-su Kim, Dong-min Im
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Patent number: 8906553Abstract: A cathode electrode material for use in rechargeable Li-ion batteries, based on the integration of two Li-based materials of NASICON- and Spinel-type structures, is described in the present invention. The structure and composition of the cathode can be described by a core material and a surface coating surrounding the core material, wherein the core of the cathode particle is of the formula LiMn2-xNixO4?? (0.5?x?0 & 0???1) and having a spinel crystal structure, the surface coating is of the formula Li1+xMxTi2-x(PO4)3 (M: is a trivalent cation, 0.5?x?0) having a NASICON-type crystal structure.Type: GrantFiled: February 28, 2011Date of Patent: December 9, 2014Assignee: NEI CorporationInventors: Nader Marandian Hagh, Farid Badway, Ganesh Skandan
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Publication number: 20140356720Abstract: A substituted lithium-manganese metal phosphate of formula LiFexMn1-x-yMyPO4 in which M is a bivalent metal from the group Sn, Pb, Zn, Ca, Sr, Ba, Co, Ti and Cd and wherein: x<1, y<0.3 and x+y<1, a process for producing it as well as its use as cathode material in a secondary lithium-ion battery.Type: ApplicationFiled: January 28, 2011Publication date: December 4, 2014Applicant: SUED-CHEMIE IP GMBH & CO. KGInventors: Gerhard Nuspl, Nicholas Tran, Jasmin Dollinger, Christian Vogler
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Publication number: 20140356695Abstract: There is provided a battery including a positive electrode, a negative electrode, a separator at least including a porous film, and an electrolyte. The positive electrode includes a positive electrode current collector having a pair of surfaces, and a positive electrode active material layer provided on each of the surfaces of the positive electrode current collector. The positive electrode active material layer contains a positive electrode active material. The positive electrode active material layer has an area density S [mg/cm2] more than or equal to 30 mg/cm2. The porous film included in the separator has a porosity ? [%] and an air permeability t [sec/100 cc] which satisfy a predetermined formula.Type: ApplicationFiled: May 19, 2014Publication date: December 4, 2014Applicant: Sony CorporationInventors: Tomohiro ABE, Motomi SUZUKI
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Publication number: 20140356717Abstract: The present invention is directed to a lithium ion secondary battery positive electrode, a lithium ion secondary battery, a vehicle mounting the same, and an electric power storage system, which improve the electron conductivity even inside an active material formed into a secondary particle.Type: ApplicationFiled: November 21, 2012Publication date: December 4, 2014Inventors: Akira Gunji, Shin Takahashi, Hiroaki Konishi, Xiaoliang Feng, Takuya Aoyagi
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Publication number: 20140356714Abstract: The invention relates to a process for preparing a core-shell structured lithiated manganese oxide, comprising the steps of providing spinel LiMxMn2-xO4 particles, where M is one or more metal ions selected from the group consisting of Li, Mg, Cr, Al, Co, Ni, Zn, Cu, and La, and 0?x<1, as core particles, and subjecting the spinel particles to a heat-treatment with a reactive chemical reagent in the form of liquid or gas to form a shell layer on the surface of the core particles, and to the prepared core-shell structured lithiated manganese oxide, and its use as a cathode material for a lithium ion batteryType: ApplicationFiled: January 16, 2012Publication date: December 4, 2014Applicant: ROBERT BOSCH GMBHInventors: Roger Zhou, Yongyao Xia, Rongrong Jiang, Yonggang Wang, Wangjun Cui, Yuqian Dou, Long Chen
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Publication number: 20140356713Abstract: The present invention relates to an anode active material with whole particle concentration gradient for a lithium secondary battery, a method for preparing same, and a lithium secondary battery having same, and more specifically, to a composite anode active material, a method for manufacturing same, and a lithium secondary battery having same, the composite anode active material having excellent lifetime characteristics and charge/discharge characteristics through the stabilization of crystal structure as the concentration of a metal comprising the anode active material shows concentration gradient in the whole particle, and having thermostability even in high temperatures.Type: ApplicationFiled: August 19, 2014Publication date: December 4, 2014Inventors: Yang-Kook SUN, Hyung Joo NOH
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Patent number: 8900757Abstract: A positive electrode capable of achieving both of high volumetric energy density and high volumetric power density and a lithium ion secondary battery using the same are provided. A lithium ion secondary battery includes a positive electrode including a current collector with a positive active material mixture layer applied on both faces thereof, the positive active material mixture layer including active material particles, conductive additive particles and a binder. The active material particles used have a value D of an average particle diameter D50 of the active material particles in the range from 1 to 10 ?m. The ratio b/a of the volume fraction b of the vacancy volume in the positive active material mixture layer to the volume fraction a of the active material particles in the positive active material mixture layer is in the range of ?0.01D+0.57?b/a??0.01D+0.97.Type: GrantFiled: February 16, 2012Date of Patent: December 2, 2014Assignee: Hitachi Automotive Systems, Ltd.Inventors: Ikuo Ozaki, Yoshimasa Koishikawa, Yoshihisa Okuda, Yuki Takei
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Patent number: 8900752Abstract: A lead manganese-based cathode material is provided. Furthermore, a lithium or lithium ion rechargeable electrochemical cell is provided incorporating lead manganese-based cathode material in a positive electrode. In addition, a process for preparing a stable lead manganese-based cathode material is provided.Type: GrantFiled: October 19, 2011Date of Patent: December 2, 2014Assignee: The United States of America as represented by the Secretary of the ArmyInventors: Terrill B. Atwater, Arek Suszko
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Patent number: 8900753Abstract: A cathode material with excellent capacity and output characteristics and safety, and a lithium ion secondary battery using the same is provided. The invention relates to a cathode material which includes a mixture of a cathode active material having a large primary particle size with excellent capacity characteristics and represented by the composition formula: Lix1Nia1Mnb1Coc1O2, where 0.2?x1?1.2, 0.6?a1, 0.05?b1?0.3, 0.05?c1?0.3, and another cathode active material having a small primary particle size with excellent output characteristics and represented by the composition formula: Lix2Nia2Mnb2Coc2O2, where 0.2?x2?1.2, a2?0.5, 0.05?b2?0.5, 0.05?c2?0.5. The invention also relates to a lithium ion secondary battery using the cathode material.Type: GrantFiled: August 18, 2009Date of Patent: December 2, 2014Assignee: Hitachi Automotive Systems, Ltd.Inventors: Hiroaki Konishi, Toyotaka Yuasa, Mitsuru Kobayashi
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Publication number: 20140349170Abstract: Disclosed are a method of manufacturing an electrode for secondary batteries that includes surface-treating a current collector so as to have a morphology wherein a surface roughness Ra of 0.001 ?m to 10 ?m is formed over the entire surface thereof to enhance adhesion between an electrode active material and the current collector and an electrode for secondary batteries that is manufactured using the method.Type: ApplicationFiled: August 7, 2014Publication date: November 27, 2014Inventors: Daehong Kim, Jae Hyun Lee, Jihyun Kim
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Publication number: 20140349187Abstract: A secondary battery capable of obtaining superior battery characteristics is provided. The secondary battery of the present technology includes a cathode, an anode including an active material, and an electrolytic solution. The active material includes a core section and covering section, the core section being capable of inserting and extracting lithium ions, and the covering section being provided in at least part of a surface of the core section and being a low-crystalline or a noncrystalline. The core section includes Si and O as constituent elements, and an atom ratio x (O/Si) of O with respect to Si satisfies O?x<0.5. The covering section includes Si and O as constituent elements, and an atom ratio y (O/Si) of O with respect to Si satisfies 0.5?y?1.8. The covering section has voids, and a carbon-containing material is provided in at least part of the voids.Type: ApplicationFiled: December 5, 2012Publication date: November 27, 2014Inventors: Takakazu Hirose, Kenichi Kawase, Norihiro Shimoi, Shinji Tanaka
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Patent number: 8895187Abstract: Provided is a non-aqueous electrolyte-based, high-power lithium secondary battery having a long service life and superior safety at both room temperature and high temperature, even after repeated high-current charging and discharging. The battery comprises a cathode active material composed of a mixture of lithium/manganese spinel oxide and lithium/nickel/cobalt/manganese composite oxide wherein the cathode active material exhibits the life characteristics that the capacity at 300 cycles is more than 70% relative to the initial capacity, in the provision of satisfying the condition (i) regarding the particle size and the condition (ii) regarding the mixing ratio.Type: GrantFiled: February 26, 2010Date of Patent: November 25, 2014Assignee: LG Chem, Ltd.Inventors: Ji Heon Ryu, Min Su Kim, Jung Eun Hyun, Jaepil Lee, Eun Ju Lee, Youngjoon Shin
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Patent number: 8895186Abstract: It is an objective of the present invention to provide a lithium-ion rechargeable battery anode which can control the volume change of a primary particle of a negative-electrode active material other than a carbon-based material and that can prevent cracks due to stress caused by the volume change from occurring and extending. There is provided an anode for a lithium-ion rechargeable battery including a primary particle of a negative-electrode active material, a conductive material, and a binder, the negative-electrode active material including at least one of silicon and tin, and at least one element selected from elements that do not chemically react with lithium, in which holes are present both in an inner core region in the central region of the primary particle of the negative-electrode active material and in a periphery region that covers the inner core region.Type: GrantFiled: May 27, 2011Date of Patent: November 25, 2014Assignee: Hitachi, Ltd.Inventors: Takashi Nakabayashi, Shin Takahashi, Motoki Ohta, Yoshihito Yoshizawa
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Patent number: 8895467Abstract: An Ag/MnyOx/C catalyst is disclosed, wherein MnyOx is one of Mn3O4 and MnO, or the mixture of Mn3O4 and MnO, or the mixture of Mn3O4 and MnO2 with the mass content of MnO2 in the mixture of Mn3O4 and MnO2 being 0.01-99.9%. The catalyst is obtained by pyrolyzing AgMnO4 at a high temperature. The preparation method comprises two steps: (1) preparing AgMnO4 crystal as the precursor; (2) preparing the Ag/MnyOx/C catalyst. The catalyst has advantages such as high oxygen reduction reaction (ORR) catalytic activity in an alkaline environment, good stability, abundant availability and low cost of raw materials, safety, non-toxicity and pollution-free, environmental friendliness, and adaptive capacity for massive production. The catalyst can be used as oxygen reduction catalyst in metal air fuel cell, alkali anion exchange membrane fuel cell and other alkaline environments.Type: GrantFiled: November 30, 2010Date of Patent: November 25, 2014Assignee: Dalian Institute of Chemical Physics, Chinese Academy of SciencesInventors: Gongquan Sun, Qiwen Tang, Luhua Jiang, Suli Wang
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Patent number: 8895191Abstract: According to one embodiment, a nonaqueous electrolyte battery is provided. A positive electrode contains a lithium-nickel-cobalt-manganese complex oxide represented by the formula Li1+aNi1?b?cCobMncO2. A negative electrode contains at least one selected from a lithium titanate having a spinel structure and a monoclinic ?-type titanium complex oxide. The negative electrode further contains at least one selected from an oxide which has a spinel structure and represented by the formula AFe2O4 and an oxide which has a spinel structure and represented by the formula ACo2O4. A ratio of the total mass of AFe2O4 and ACo2O4 to the total mass of the negative electrode active material is in a range from 1% by mass to 5% by mass.Type: GrantFiled: December 27, 2012Date of Patent: November 25, 2014Assignee: Kabushiki Kaisha ToshibaInventors: Keigo Hoshina, Hiroki Inagaki, Norio Takami
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Publication number: 20140342194Abstract: A rechargeable battery that features two or more levels of internal resistance according to various temperature ranges is disclosed.Type: ApplicationFiled: February 25, 2014Publication date: November 20, 2014Applicant: EC Power, LLCInventors: Chao-Yang WANG, Wei ZHAO
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Publication number: 20140342229Abstract: Disclosed are a cathode active material for a lithium secondary battery, and a lithium secondary battery including the same. The disclosed cathode active material includes a core including a compound represented by Formula 1; and a shell including a compound represented by Formula 2, in which the core and the shell have different material compositions.Type: ApplicationFiled: December 12, 2012Publication date: November 20, 2014Inventors: Byung-Sung Leo Kwak, Joseph G. Gordon, II, Omkaram Nalamasu, Yangkook Sun, Wongi Kim, Seugmin Oh
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Publication number: 20140342231Abstract: Provided is positive electrode material for a highly safe lithium-ion secondary battery that can charge and discharge a large current while having long service life. Disclosed are composite particles comprising: particles of lithium-containing phosphate; and carbon coating comprising at least one carbon material selected from the group consisting of (i) fibrous carbon material, (ii) chain-like carbon material, and (iii) carbon material produced by linking together fibrous carbon material and chain-like carbon material, wherein each particle is coated with the carbon coating. The fibrous carbon material is preferably a carbon nanotube with an average fiber size of 5 to 200 nm. The chain-like carbon material is preferably carbon black produced by linking, like a chain, primary particles with an average particle size of 10 to 100 nm. The lithium-containing phosphate is preferably LiFePO4, LiMnPO4, LiMnXFe(1-X)PO4, LiCoPO4, or Li3V2(PO4)3.Type: ApplicationFiled: November 14, 2012Publication date: November 20, 2014Inventors: Takashi Kawasaki, Nobuyuki Yoshino, Hiroshi Murata, Takehiko Sawai, Shinji Saito, Kazunori Urao
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Publication number: 20140342228Abstract: The present invention is to provide a lithium titanate (LTO) material for a lithium ion battery. The LTO material has hierarchical micro/nano architecture, and comprises a plurality of micron-sized secondary LTO spheres, and a plurality of pores incorporated with metal formed by a metal dopant. Each of the micron-sized secondary LTO spheres comprises a plurality of nano-sized primary LTO particles. A plurality of the nano-sized primary LTO particles is encapsulated by a non-metal layer formed by a non-metal dopant. The LTO material of the present invention has high electrical conductivity for increasing the capacity at high charging/discharging rates, and energy storage capacity.Type: ApplicationFiled: April 10, 2014Publication date: November 20, 2014Applicant: Nano and Advanced Materials Institute LimitedInventors: Chenmin LIU, Lifeng CAI, Shing Yan CHOI
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Patent number: 8889297Abstract: The present disclosure relates to a nanocomposite cathode active material for a lithium secondary battery, a method for preparing same, and a lithium secondary battery including same. More particularly, the present disclosure relates to a nanocomposite cathode active material for a lithium secondary battery including: a core including LiMn2O4; and LiMn(PO3)3 distributed on the surface of the core. In accordance with the present disclosure, the time and cost for manufacturing a lithium secondary battery can be reduced and the manufactured lithium secondary battery has superior electrochemical properties.Type: GrantFiled: January 10, 2013Date of Patent: November 18, 2014Assignee: Korea Institute of Science and TechnologyInventors: Kyung Yoon Chung, Dieky Susanto, Won Young Chang, Byung Won Cho
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Publication number: 20140335407Abstract: A method for configuring a non-lithium-intercalation electrode includes intercalating an insertion species between multiple layers of a stacked or layered electrode material. The method forms an electrode architecture with increased interlayer spacing for non-lithium metal ion migration. A laminate electrode material is constructed such that pillaring agents are intercalated between multiple layers of the stacked electrode material and installed in a battery.Type: ApplicationFiled: May 9, 2014Publication date: November 13, 2014Inventors: Yan YAO, Yanliang LIANG