Alkalated Transition Metal Chalcogenide Component Is Active Material Patents (Class 429/231.1)
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Publication number: 20150072232Abstract: In a lithium-ion secondary battery (100), positive electrode active material particles (610) each include a shell portion (612) made of a layered lithium-transition metal oxide, a hollow portion (614) formed inside the shell portion (612), and a through-hole (616) penetrating through the shell portion (612). A positive electrode active material layer (223) has a density A of 1.80 g/cm3?A?2.35 g/cm3, and a negative electrode active material layer (243) has a density B of 0.95 g/cm3?B?1.25 g/cm3.Type: ApplicationFiled: March 30, 2012Publication date: March 12, 2015Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Hiroki Nagai
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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
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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
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Publication number: 20150064577Abstract: A lithium ion secondary battery includes a positive electrode; a negative electrode; a separator disposed between the positive electrode and the negative electrode; and a non-aqueous electrolyte, wherein the positive electrode contains, as a positive electrode active material, a lithium-containing transition metal compound that belongs to space group Fd3-m and that contains lithium and transition metal M (M represents Mo, or Mo and at least one selected from the group consisting of Mn, Co, Ni, W, and V), a molar ratio of the lithium to the transition metal M is 2.7 or more and 3.3 or less, and a ratio of a mass of the lithium-containing transition metal compound to a total mass of the positive electrode active material in the positive electrode is 0.8 or more.Type: ApplicationFiled: August 1, 2014Publication date: March 5, 2015Inventors: RYUICHI NATSUI, KENSUKE NAKURA
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Publication number: 20150064556Abstract: An electrode for a rechargeable battery and a rechargeable battery, the electrode including a current collector; an electrode active material layer; and an electrolyte solution impregnation layer, wherein the electrolyte solution impregnation layer includes a metal oxide and a conductive material.Type: ApplicationFiled: January 17, 2014Publication date: March 5, 2015Applicant: SAMSUNG SDI CO., LTD.Inventors: Jin-Hyon LEE, Ju-Hee SOHN, Jung-Yeon WON, Eun-Young GOH, Jong-Ki LEE, Sang-In PARK
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Publication number: 20150056493Abstract: An example of a porous separator includes an untreated porous polymer membrane, and a nanocomposite structure i) formed on a surface of the porous polymer membrane, or ii) dispersed in pores of the porous polymer membrane, or iii) combinations of i and ii. The nanocomposite structure is selected from the group consisting of a carbon nanocomposite structure, a metal oxide nanocomposite structure, and a mixed carbon and metal oxide nanocomposite structure.Type: ApplicationFiled: September 13, 2013Publication date: February 26, 2015Applicant: GM Global Technology Operations LLCInventors: Gayatri Vyas Dadheech, Li Yang, Mei Cai
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Publication number: 20150056511Abstract: To provide a cathode active material for a lithium ion secondary battery, which has high packing properties and high volume capacity density, and a method for its production.Type: ApplicationFiled: November 5, 2014Publication date: February 26, 2015Applicant: AGC SEIMI CHEMICAL CO., LTD.Inventors: Satoshi TAKAMATSU, Yukimitsu WAKASUGI, Megumi UCHIDA
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Publication number: 20150056512Abstract: An object is to provide a positive electrode for a non-aqueous electrolyte secondary battery and a non-aqueous electrolyte secondary battery that allow a high output characteristic. Included are a positive electrode collector and a positive electrode mixture layer formed on at least one surface of the positive electrode collector. The positive electrode mixture layer contains particles 3 of lithium nickel cobalt manganese oxide represented by LiNi0.55Co0.20Mn0.25O2, erbium oxyhydroxide 1 fixed on the surfaces of the particles of the lithium nickel cobalt manganese oxide 3, tungsten trioxide 2 adhering to the surfaces of the particles of the lithium nickel cobalt manganese oxide 3, and a binder.Type: ApplicationFiled: January 31, 2013Publication date: February 26, 2015Applicant: SANYO Electric Co., Ltd.Inventors: Masanobu Takeuchi, Manabu Takijiri, Katsunori Yanagida, Junichi Sugaya, Takeshi Ogasawara
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Publication number: 20150050557Abstract: A negative electrode active material for a sodium-ion battery includes a Li4Ti5O12 phase. A BET specific surface area is equal to or greater than 153 m2/g, and a crystallite size is equal to or smaller than 69 ?.Type: ApplicationFiled: August 12, 2014Publication date: February 19, 2015Inventor: Hideki Nakayama
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Publication number: 20150044556Abstract: The present invention provides a cathode (positive electrode) of a lithium battery and a process for producing this cathode. The electrode comprises a cathode active material-coated graphene sheet and the graphene sheet has two opposed parallel surfaces, wherein at least 50% area (preferably >80%) of one of the two surfaces is coated with a cathode active material coating. The graphene material is in an amount of from 0.1% to 99.5% by weight and the cathode active material is in an amount of at least 0.5% by weight (preferably >80% and more preferably >90%), all based on the total weight of the graphene material and the cathode active material combined. The cathode active material is preferably an inorganic material, an organic or polymeric material, a metal oxide/phosphate/sulfide, or a combination thereof. The invention also provides a lithium battery, including a lithium-ion, lithium-metal, or lithium-sulfur battery.Type: ApplicationFiled: August 8, 2013Publication date: February 12, 2015Inventors: Yanbo Wang, Bor Z. Jang, Hui He, Aruna Zhamu
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Publication number: 20150044568Abstract: A method for manufacturing lithium titanate (Li4Ti5O12) of a substantially single phase, which is excellent in rate performance, and can be easily handled. The lithium titanate (Li4Ti5O12) is prepared from substantially a raw material powder consisting of a lithium compound and a raw material powder consisting of a titanic acid compound which are mixed and the resultant mixture is calcined. A lithium carbonate is used as the lithium compound and metatitanic acid or orthotitanic acid is used as the titanic acid compound. The penetration speed coefficient of the lithium titanate obtained, to a nonaqueous electrolyte is larger than a penetration speed coefficient of lithium titanate, obtained by using a lithium hydroxide as the lithium compound, to the same nonaqueous electrolyte. The specific surface area of the lithium titanate obtained is 10 m2/g or less.Type: ApplicationFiled: March 14, 2013Publication date: February 12, 2015Applicant: TAYCA CORPORATIONInventors: Keiichi Watanabe, Shuji Nishida
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Publication number: 20150044564Abstract: The present invention provides an anode electrode of a lithium-ion battery, comprising an anode active material-coated graphene sheet, wherein the graphene sheet has two opposed parallel surfaces and at least 50% area of one of the surfaces is coated with an anode active material and wherein the graphene material is in an amount of from 0.1% to 99.5% by weight and the anode active material is in an amount of at least 0.5% by weight (preferably at least 60%), all based on the total weight of the graphene material and the anode active material combined.Type: ApplicationFiled: August 8, 2013Publication date: February 12, 2015Inventors: Yanbo Wang, Bor Z. Jang, Hui He, Aruna Zhamu
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Publication number: 20150044576Abstract: An all-solid-state cell, which includes a lithium-containing anode, a cathode and a lithium ions-conducting solid-state electrolyte separator situated between the anode and the cathode. To improve the safety and cycle stability of the cell, the cathode includes a composite material including at least one lithium titanate and at least one lithium ions-conducting solid-state electrolyte. Furthermore, the invention relates to a corresponding all-solid-state battery and a mobile or stationary system equipped with it.Type: ApplicationFiled: January 24, 2013Publication date: February 12, 2015Applicant: Robert Bosch GmbHInventors: Ulrich Eisele, Alan Logeat, Hideki Ogihara
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Publication number: 20150044565Abstract: The present invention provides a process for producing a graphene-enhanced anode active material for use in a lithium battery. The process comprises (a) providing a continuous film of a graphene material into a deposition zone; (b) introducing vapor or atoms of a precursor anode active material into the deposition zone, allowing the vapor or atoms to deposit onto a surface of the graphene material film to form a sheet of an anode active material-coated graphene material; and (c) mechanically breaking this sheet into multiple pieces of anode active material-coated graphene; wherein the graphene material is in an amount of from 0.1% to 99.5% by weight and the anode active material is in an amount of at least 0.5% by weight, all based on the total weight of the graphene material and the anode active material combined.Type: ApplicationFiled: August 8, 2013Publication date: February 12, 2015Inventors: Yanbo Wang, Bor Z. Jang, Hui He, Aruna Zhamu
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Patent number: 8951448Abstract: A cathode material for a lithium secondary battery capable of stably suppressing manganese dissolution even under high temperature and voltage conditions is provided. Further, by using the cathode material for a lithium secondary battery, a lithium secondary battery excellent in a charge/discharge cycle profile at a high temperature and a secondary battery module equipped with the battery are provided. The cathode material for a lithium secondary battery comprises a lithium manganese composite oxide and a coating layer formed on the surface of the lithium manganese composite oxide. The coating layer includes an oxide compound or a fluoride compound each containing M (wherein, M is at least one element selected from the group of Mg, Al and Cu), and a phosphorous compound. An atomic density of M at the side of the lithium manganese composite oxide in the coating layer is higher than an atomic density of M at the side of a surface layer of the coating layer facing to the electrolyte.Type: GrantFiled: February 24, 2011Date of Patent: February 10, 2015Assignee: Hitachi, Ltd.Inventors: Tatsuya Toyama, Kazushige Kohno
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Publication number: 20150037689Abstract: Provided is a lithium secondary battery with three-dimensional network porous bodies as current collectors in which the internal resistance does not increase even after repeated charging and discharging. A lithium secondary battery including a positive electrode and a negative electrode each having as a current collector a three-dimensional network porous body, the positive electrode and the negative electrode being formed by filling at least an active material into pores of the three-dimensional network porous bodies, wherein the three-dimensional network porous body for the positive electrode is a three-dimensional network aluminum porous body having a hardness of 1.2 GPa or less, and the three-dimensional network porous body for the negative electrode is a three-dimensional network copper porous body having a hardness of 2.6 GPa or less.Type: ApplicationFiled: February 22, 2013Publication date: February 5, 2015Inventors: Junichi Nishimura, Kazuhiro Gotou, Akihisa Hosoe, Kentarou Yoshida
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Publication number: 20150037679Abstract: The invention relates to electrodes that contain active materials of the formula: AaMbXzOy wherein A is one or more alkali metals selected from lithium,sodium and potassium; M is selected from one or more transition metals and/or one or more non-transition metals and/or one or more metalloids; X comprises one or more atoms selected from niobium, antimony, tellurium, tantalum, bismuth and selenium; and further wherein 0<a?6; b is in the range: 0<b?4; x is in the range 0<x?1 and y is in the range 2?y?10. Such electrodes are useful in, for example, sodium and/or lithium ion battery applications.Type: ApplicationFiled: March 21, 2013Publication date: February 5, 2015Inventors: Jeremy Barker, Richard Heap
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Publication number: 20150030929Abstract: The invention relates to electrodes that contain active materials of the formula: NaaXbMcM?d(condensed polyanion)e(anion)f; where X is one or more of Na+, Li+ and K+; M is one or more transition metals; M? is one or more non-transition metals; and where a>b; c>0; d?0; e?1 and f?0. Such electrodes are useful in, for example, sodium ion battery applications.Type: ApplicationFiled: September 25, 2012Publication date: January 29, 2015Inventor: Jeremy Barker
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Patent number: 8940443Abstract: An electrolyte comprising an organic solvent, a lithium salt, and a polymer additive comprised of repeating vinyl units joined to one or more heterocyclic amine moieties is described. The heterocyclic amine contains five to ten ring atoms, inclusive. An electrochemical cell is also disclosed. The preferred cell comprises a negative electrode which intercalates with lithium, a positive electrode comprising an electrode active material which intercalates with lithium, and the electrolyte of the present invention activating the negative and the positive electrodes.Type: GrantFiled: November 14, 2008Date of Patent: January 27, 2015Assignee: Greatbatch Ltd.Inventor: Chi-Kyun Park
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Publication number: 20150024280Abstract: In a battery production process, a positive electrode active material having a reaction-suppressing layer that does not easily peel off formed on the surface thereof, and a positive electrode and an all-solid-state battery that use said material are provided. The present invention involves positive electrode active material particles for an all-solid-state battery containing sulfide-based solid electrolyte. The positive electrode active material particles are an aggregate containing two or more particles. The surface of the aggregate is coated with a reaction-suppressing layer for suppressing reactions with the sulfide-based solid electrolyte.Type: ApplicationFiled: May 23, 2011Publication date: January 22, 2015Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Takayuki Uchiyama
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Publication number: 20150024273Abstract: The present invention relates to lithium composite oxide particles which can be produced by mixing nickel-cobalt-manganese-based compound particles, a zirconium raw material and a lithium raw material with each other and then calcining the resulting mixture, and comprise a Zr compound that is allowed to be present on a surface thereof, in which the Zr compound is represented by the chemical formula: Lix(Zr1-yAy)Oz wherein x, y and z are 2.0?x?8.0; 0?y?1.0; and 2.0?z?6.0, respectively, and a content of Zr in the lithium composite oxide particles is 0.05 to 1.0% by weight. By using the lithium composite oxide particles as a positive electrode active substance, it is possible to produce a lithium ion secondary battery that has a low electric resistance at a high temperature, and is excellent in cycle characteristic at a high temperature as well as high-temperature rate characteristic.Type: ApplicationFiled: March 14, 2013Publication date: January 22, 2015Inventors: Minoru Yamazaki, Osamu Sasaki, Shoichi Fujino, Hideharu Mitsui, Takayuki Yamamura, Kunihiro Uramatsu, Akihisa Kajiyama, Ryuta Masaki
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Publication number: 20150017535Abstract: A cathode active material, a preparation method thereof, and a cathode for a lithium secondary battery and a lithium secondary battery including the cathode active material, wherein the cathode active material includes a core active material represented by Formula 1 below; and a coating layer formed on a surface of the core active material, the coating layer including lithium gallium oxide: Lia(A1-x-yBxCy)O2 ??Formula 1 In Formula 1, a, x, y, A, B, and C are defined in the detailed description.Type: ApplicationFiled: November 19, 2013Publication date: January 15, 2015Applicant: SAMSUNG SDI CO., LTD.Inventors: Ming-Zi Hong, Do-Hyung Park, Seon-Young Kwon, Joong-Ho Moon, Ji-Hyun Kim, Han-Eol Park, Min-Han Kim, Myong-A Woo, Ki-Hyun Kim, Sun-Ho Kang
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Publication number: 20150017500Abstract: 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; a conductive layer formed on the electrode active material layer and comprising a conductive material and a binder; and a first porous supporting layer formed on the conductive layer. The sheet-form electrode for a secondary battery according to the present disclosure has supporting layers on at least one surfaces 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: September 4, 2014Publication date: January 15, 2015Applicant: 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: 20150017549Abstract: Provided an all-solid lithium secondary battery hardly gives rise to internal resistance even if charging and discharging are repeated. The all-solid lithium secondary battery including a positive electrode and a negative electrode, each of electrodes being an electrode in which a three-dimensional network porous body is used as a current collector and pores of the three-dimensional network porous body are filled with at least an active material, wherein the three-dimensional network porous body of the positive electrode includes an aluminum alloy with a Young's modulus of 70 GPa or higher and the three-dimensional network porous body of the negative electrode includes a copper alloy with a Young's modulus of 120 GPa or higher.Type: ApplicationFiled: February 22, 2013Publication date: January 15, 2015Inventors: Junichi Nishimura, Kazuhiro Gotou, Akihisa Hosoe, Kentarou Yoshida
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Publication number: 20150017536Abstract: Provided is a non-aqueous electrolyte secondary battery excellent in durability, the non-aqueous electrolyte secondary battery including a positive electrode active material, the surface of which is coated with a film formed of an inorganic solid electrolyte, wherein a change in volume of the positive electrode active material during charge and discharge is reduced to prevent deterioration of the film with which the surface of the positive electrode active material is coated. In a non-aqueous electrolyte secondary battery including a positive electrode active material, the surface of which is coated with a film formed of an inorganic solid electrolyte, the positive electrode active material is a lithium-containing composite oxide having a spinel structure, and contains at least one of Ti and Mg as an additional element.Type: ApplicationFiled: March 9, 2012Publication date: January 15, 2015Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Takeshi Abe, Yoshitomo Takebayashi, Ippei Toyoshima
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Publication number: 20150017550Abstract: Provided are a current collector, an electrode, and a nonaqueous electrolyte secondary battery, each of which capable of reducing internal resistance and producing cost. More specifically, provided are: a three-dimensional network metal porous body for a current collector, comprising a sheet-shaped three-dimensional network metal porous body, wherein a degree of porosity of the sheet-shaped three-dimensional network metal porous body is 90% or more and 98% or less, and a 30%-cumulative pore diameter (D30) of the sheet-shaped three-dimensional network metal porous body calculated from a fine pore diameter measurement conducted by a bubble point method is 20 ?m or more and 100 ?m or less; an electrode using the three-dimensional network metal porous body; and a nonaqueous electrolyte secondary battery including the electrode.Type: ApplicationFiled: February 22, 2013Publication date: January 15, 2015Inventors: Junichi Nishimura, Kazuhiro Gotou, Akihisa Hosoe, Kentarou Yoshida
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Publication number: 20150017527Abstract: The present invention relates to a negative electrode active material for a rechargeable lithium battery, a method for preparing the same, and a rechargeable lithium battery using the same, and provides a negative electrode active material for a rechargeable lithium battery of a carbon-metal complex or a mixture type, containing a carbon-based active material including a first ceramic coating layer, a metal-based active material or a metal-base active material including a first ceramic coating layer, and a carbon-based active material.Type: ApplicationFiled: November 15, 2013Publication date: January 15, 2015Applicant: POSCO CHEMTECH CO., LTD.Inventors: Kyoung Muk LEE, Heon Young LEE, Mi Ryeong LEE, Eun Byeol HYEONG
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Publication number: 20150017513Abstract: Disclosed are a novel compound, a method for preparing the same, and a lithium secondary battery comprising the same. More specifically, disclosed are a compound in which five MO6 octahedrons are bonded to one another around one MO6 octahedron such that the MO6 octahedrons share a vertex, to form hollows and Li cations substituted instead of Na cations using an ion substitution method are present in the hollows, and a crystal structure thereof is not varied even upon intercalation and deintercalation of Li cations, a method for preparing the same, and a lithium secondary battery comprising the same as a cathode active material.Type: ApplicationFiled: September 30, 2014Publication date: January 15, 2015Applicant: LG CHEM, LTD.Inventors: YoungHwa JUNG, Youngsun CHOI, Seung-Tae HONG
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Patent number: 8932768Abstract: A method of manufacture an article of a cathode (positive electrode) material for lithium batteries. The cathode material is a lithium molybdenum composite transition metal oxide material and is prepared by mixing in a solid state an intermediate molybdenum composite transition metal oxide and a lithium source. The mixture is thermally treated to obtain the lithium molybdenum composite transition metal oxide cathode material.Type: GrantFiled: April 16, 2013Date of Patent: January 13, 2015Assignee: UChicago Argonne, LLCInventors: Sang-Ho Park, Khalil Amine
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Patent number: 8932765Abstract: An object is to provide an electrode assembly for an electric storage device, such as a nonaqueous electrolyte cell, and an electric storage device that are capable of preventing increase of a short-circuit current at the time of occurrence of a short-circuit within a cell and have high safety. In order to achieve the object, provided is an electrode assembly for an electric storage device including a positive electrode, a negative electrode and a separator disposed between the positive electrode and the negative electrode, in which at least one of the positive electrode and the negative electrode includes a current collector, an active material layer formed on at least one face of the current collector, and an undercoat layer formed between the current collector and the active material layer and including an organic binder that evaporates and decomposes when heated to a predetermined temperature or more.Type: GrantFiled: July 6, 2011Date of Patent: January 13, 2015Assignee: GS Yuasa International Ltd.Inventors: Akihiko Miyazaki, Sumio Mori, Taro Yamafuku, Minoru Teshima
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Patent number: 8932480Abstract: The present invention provides a LiCoO2-containing powder comprising LiCoO2 having a stoichiometric composition via heat treatment of a lithium cobalt oxide and a lithium buffer material to make equilibrium of a lithium chemical potential there between; a lithium buffer material which acts as a Li acceptor or a Li donor to remove or supplement Li-excess or Li-deficiency, coexisting with a stoichiometric lithium metal oxide; and a method for preparing a LiCoO2-containing powder. Further, provided is an electrode comprising the above-mentioned LiCoO2-containing powder as an active material, and a rechargeable battery comprising the same electrode.Type: GrantFiled: December 15, 2010Date of Patent: January 13, 2015Assignee: LG Chem, Ltd.Inventors: Jens M. Paulsen, Sun Sik Shin, Hong-Kyu Park
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Patent number: 8932761Abstract: An anode wherein the anode active material layer includes anode active material particles made of an anode active material including at least one of silicon and tin as an element. An oxide-containing film including an oxide of at least one kind selected from the group consisting of silicon, germanium and tin is formed in a region in contact with an electrolytic solution of the surface of each anode active material particle. The region in contact with the electrolytic solution of the surface of each anode active material particle is covered with the oxide-containing film.Type: GrantFiled: May 22, 2007Date of Patent: January 13, 2015Assignee: Sony CorporationInventors: Hiroyuki Yamaguchi, Hiroshi Horiuchi, Kenichi Kawase, Tadahiko Kubota, Hideki Nakai, Takakazu Hirose
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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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Patent number: 8927153Abstract: The present invention relates to a cathode active material for lithium secondary batteries with high safety, a method of preparing the same and lithium secondary batteries comprising the same. The cathode active material of the present invention comprises a lithium metal oxide secondary particle core portion formed by aggregation of lithium metal oxide primary particles; and a shell portion formed by coating the secondary particle core portion with an olivine-structured lithium iron phosphate oxide. The cathode active material of the present invention allows to manufacture lithium secondary batteries with improved safety, especially overcharge characteristics.Type: GrantFiled: October 31, 2007Date of Patent: January 6, 2015Assignees: Daejung Em Co., Ltd., Kokam Co., Ltd.Inventors: Seong-Bae Kim, Woo-Seong Kim, Ji-Jun Hong, Sung-Tae Koh, Yoon-Jeong Heo
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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: 8920981Abstract: There is provided in one embodiment of the invention an electrolyte for use in a lithium ion electrochemical cell. The electrolyte comprises a mixture of an ethylene carbonate (EC), an ethyl methyl carbonate (EMC), an ester cosolvent, and a lithium salt. The ester cosolvent comprises methyl propionate (MP), ethyl propionate (EP), methyl butyrate (MB), ethyl butyrate (EB), propyl butyrate (PB), or butyl butyrate (BB). The electrochemical cell operates in a temperature range of from about ?60 degrees Celsius to about 60 degrees Celsius. In another embodiment there is provided a lithium ion electrochemical cell using the electrolyte of the invention.Type: GrantFiled: April 7, 2009Date of Patent: December 30, 2014Assignee: California Institute of TechnologyInventors: Marshall C. Smart, Ratnakumar V. Bugga
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Patent number: 8920975Abstract: Provided is a method of producing a nitrided lithium-transition metal compound oxide having a rock-salt layer structure or a spinel structure, including: preparing a raw material composite that has a raw material containing lithium, transition metal, and oxygen and a nitriding agent that is expressed by a following General Formula (1) and is solid or liquid at room temperature (25° C.); and synthesizing the nitrided lithium-transition metal compound oxide by firing the raw material composite to nitride the raw material. R1, R2, and R3 are independent of each other and are each a functional group having at least one of carbon (C), hydrogen (H), oxygen (O), and nitrogen (N).Type: GrantFiled: May 21, 2010Date of Patent: December 30, 2014Assignee: Toyota Jidosha Kabushiki KaishaInventors: Hideki Oki, Toshihiro Seguchi
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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: 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: 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: 20140377661Abstract: Disclosed are an electrode for secondary batteries including an electrode mixture coated on one surface or opposite surface of an electrode current collector, and a method of manufacturing the same. The electrode mixture includes an electrode mixture layer A, which is a portion close to a current collector, and an electrode mixture layer, which is a portion distant from a current collector. The electrode mixture layer A includes a mixture of two active materials, average diameters of which are different, and the electrode mixture layer B includes active materials, average diameters of which are the same.Type: ApplicationFiled: September 15, 2014Publication date: December 25, 2014Applicant: LG CHEM, LTD.Inventors: Iljoon Lee, Jae Hyun Lee, Jihyun Kim
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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: 20140370398Abstract: A method of preparing a lithium battery according to an embodiment of the present invention may include preparing a mixture including lithium phosphorus sulfide and metal sulfide, preparing an electrode composite by applying a physical pressure to the mixture, wherein the electrode composite includes lithium phosphorus sulfide, lithium metal sulfide, and amorphous sulfide, preparing an electrode active layer by using the electrode composite, forming an electrode current collector on one side of the electrode active layer, and forming an electrolyte layer on another side of the electrode active layer.Type: ApplicationFiled: April 29, 2014Publication date: December 18, 2014Applicants: Electronics and Telecommunications Research Institute, UNIST Academy-Industry Research CorporationInventors: Young-Gi LEE, Kwang Man KIM, Kunyoung KANG, Dong Ok SHIN, Yoon Seok JUNG, Bum Ryong SHIN
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Publication number: 20140370387Abstract: Composite silicon based materials are described that are effective active materials for lithium ion batteries. The composite materials comprise processed, e.g., high energy mechanically milled, silicon suboxide and graphitic carbon in which at least a portion of the graphitic carbon is exfoliated into graphene sheets. The composite materials have a relatively large surface area, a high specific capacity against lithium, and good cycling with lithium metal oxide cathode materials. The composite materials can be effectively formed with a two step high energy mechanical milling process. In the first milling process, silicon suboxide can be milled to form processed silicon suboxide, which may or may not exhibit crystalline silicon x-ray diffraction. In the second milling step, the processed silicon suboxide is milled with graphitic carbon. Composite materials with a high specific capacity and good cycling can be obtained in particular with balancing of the processing conditions.Type: ApplicationFiled: June 13, 2013Publication date: December 18, 2014Inventors: Yogesh Kumar Anguchamy, Haixia Deng, Yongbong Han, Charan Masarapu, Sujeet Kumar, Herman A. Lopez
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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