Alkaline Earth Metal Or Magnesium (mg) Component Is Active Material Patents (Class 429/231.6)
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Publication number: 20080318127Abstract: Primary and secondary Li-ion and lithium-metal based electrochemical cell systems. The suppression of gas generation is achieved through the addition of an additive or additives to the electrolyte system of respective cell, or to the cell itself whether it be a liquid, a solid- or plasticized polymer electrolyte system. The gas suppression additives are primarily based on unsaturated hydrocarbons.Type: ApplicationFiled: May 30, 2008Publication date: December 25, 2008Inventors: Ilias Belharouak, Khalil Amine
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Publication number: 20080311432Abstract: A cathode including an active material composite and a lithium battery using the same. The active material composite of the cathode includes a mixed oxide complex and a lithium-containing compound, the lithium-containing compound having a metal based compound coated on the surface of the lithium-containing compound.Type: ApplicationFiled: April 16, 2008Publication date: December 18, 2008Applicant: Samsung SDI Co. Ltd.Inventors: Kyu-sung Park, Jae-gu Yoon, Seok-gwang Doo
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Patent number: 7462421Abstract: A positive electrode active material for a lithium ion secondary battery is a lithium-containing composite oxide represented by the chemical formula: Lia(Co1-x-yMgxAly)bMzOc, where M is at least one element selected from the group consisting of Na and K, and the values a, b, c, x, y and z respectively satisfy 0?a?1.05, 0.005?x?0.15, 0.0001?y?0.01, 0.0002?z?0.008, 0.85?b?1.1 and 1.8?c?2.1. This makes it possible to improve a high temperature storage characteristics and safety of the lithium ion secondary battery.Type: GrantFiled: February 5, 2004Date of Patent: December 9, 2008Assignee: Panasonic CorporationInventors: Hideyasu Takatsuji, Masaya Okochi, Yosuke Kita, Ryoichi Tanaka, Shoichiro Watanabe
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Patent number: 7459235Abstract: Provided are an anode composition for a lithium battery, and an anode and a lithium battery using the same. The anode composition can improve anode and battery characteristics while using water as a solvent that is harmless to humans. The anode composition includes an anode active material, a synthetic rubber binder, a cellulose-based dispersing agent, and a water-soluble anionic polyelectrolyte.Type: GrantFiled: June 21, 2004Date of Patent: December 2, 2008Assignee: Samsung SDI Co., Ltd.Inventors: Young-Min Choi, Kyung-Ho Kim, Ungyu Paik
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Patent number: 7457018Abstract: Method of synthesis for a material made of particles having a core and a coating and/or being connected to each other by carbon cross-linking, the core of these particles containing at least one compound of formula LixM1-yM?y(XO4)n, in which x, y and n are numbers such as 0?x?2, 0?y?0.6 and 1?n?1.5, M is a transition metal, M? is an element with fixed valency, and the synthesis is carried out by reaction and bringing into equilibrium the mixture of precursors, with a reducing gaseous atmosphere, in such a way as to bring the transition metal or metals to the desired valency level, the synthesis being carried out in the presence of a source of carbon called carbon conductor, which is subjected to pyrolysis. The materials obtained have excellent electrical conductivity, as well as very improved chemical activity.Type: GrantFiled: January 19, 2007Date of Patent: November 25, 2008Assignee: Hydro-QuebecInventors: Michel Armand, Michel Gauthier, Jean-Francois Magnan, Nathalie Ravet
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Publication number: 20080285211Abstract: Synthesis process for new particles of Li4Ti5O12, Li(4-?)Z?Ti5O12 or Li4Z?Ti(5-?)O12, preferably having a spinel structure, wherein ? is greater than 0 and less than or equal to 0.5 (preferably having a spinel structure), ? representing a number greater than zero and less than or equal to 0.33, Z representing a source of at least one metal, preferably chosen from the group made up of Mg, Nb, Al, Zr, Ni, Co. These particles coated with a layer of carbon notably exhibit electrochemical properties that are particularly interesting as components of anodes and/or cathodes in electrochemical generators.Type: ApplicationFiled: May 2, 2008Publication date: November 20, 2008Applicant: Hydro-QuebecInventors: Karim Zaghib, Michel Gauthier, Fernand Brochu, Abdelbast Guerfi, Monique Masse, Michel Armand
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Patent number: 7452631Abstract: In a non-aqueous electrolyte secondary battery using a layered lithium-transition metal composite oxide as a positive electrode active material, elevated-temperature durability, that is, elevated-temperature storage performance is enhanced without degrading battery capacity. The non-aqueous electrolyte secondary battery includes: a positive electrode including, as a positive electrode active material, layered lithium-transition metal composite oxide containing lithium, nickel, and manganese; a negative electrode active material capable of intercalating and deintercalating lithium; and a non-aqueous electrolyte having lithium ion conductivity, and the lithium-transition metal composite oxide contains a group IVA element and a group IIA element of the periodic table.Type: GrantFiled: May 27, 2005Date of Patent: November 18, 2008Assignee: SANYO Electric Co., Ltd.Inventors: Hideki Kitao, Toyoki Fujihara, Kazuhisa Takeda, Naoya Nakanishi, Toshiyuki Nohma
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NEGATIVE ELECTRODE FOR RECHARGEABLE LITHIUM BATTERY, AND RECHARGEABLE LITHIUM BATTERY INCLUDING SAME
Publication number: 20080268338Abstract: The negative electrode for a rechargeable lithium battery includes a current collector and a negative active material layer disposed on the current collector. The negative active material layer includes a metal-based negative active material and sheet-shaped graphite and has porosity of 20 to 80 volume %. The negative electrode for a rechargeable lithium battery can improve cell characteristics by inhibiting volume change and stress due to active material particle bombardment during charge and discharge, and by decreasing electrode resistance.Type: ApplicationFiled: January 22, 2008Publication date: October 30, 2008Applicant: Samsung SDI Co., Ltd.Inventors: SANG-MIN LEE, Goo-Jin Jeong, Min-Seok Sung, Yong-Mook Kang, Wan-Uk Choi, Sung-Soo Kim -
Patent number: 7442469Abstract: A cathode with a cathode active material is provided. The cathode active material is obtained by mixing a zirconium-containing lithium cobalt composite oxide containing zirconium as a sub-component element in a first lithium cobalt composite oxide expressed by a formula LitCoMsO2 (where M is at least one kind of element selected from Fe, V, Cr, Ti, Mg, Al, B, and Ca; 0?s?0.03; 0.05?t?1.15), and a second lithium cobalt composite oxide expressed by a formula LixCol-yAyO2 (where A is at least one kind of element selected from Mg and Al; 0.05?x?1.15; 0?y?0.03).Type: GrantFiled: February 13, 2007Date of Patent: October 28, 2008Assignee: Sony CorporationInventors: Takashi Sato, Takahisa Ishimatsu, Kei Yonezawa, Yoshikatsu Yamamoto
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Patent number: 7438992Abstract: The invention provides novel lithium-mixed metal materials which, upon electrochemical interaction, release lithium ions, and are capable of reversibly cycling lithium ions. The invention provides a rechargeable lithium battery which comprises an electrode formed from the novel lithium-mixed metal materials. Methods for making the novel lithium-mixed metal materials and methods for using such lithium-mixed metal materials in electrochemical cells are also provided. The lithium-mixed metal materials comprise lithium and at least one other metal besides lithium. Preferred materials are lithium-mixed metal phosphates which contain lithium and two other metals besides lithium.Type: GrantFiled: February 16, 2006Date of Patent: October 21, 2008Assignee: Valence Technology, Inc.Inventors: Jeremy Barker, M. Yazid Saidi
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Patent number: 7435510Abstract: A nonaqueous electrolyte secondary battery comprising a positive electrode containing a positive active material, a negative electrode containing a negative active material and a nonaqueous electrolyte, wherein a lithium transition metal complex oxide A formed by allowing LiCoO2 to contain at least both of Zr and Mg and a lithium transition metal complex oxide B having a layered structure and containing at least both of Mn and Ni as transition metals and containing molybdenum (Mo) are mixed and used as said positive active material.Type: GrantFiled: June 29, 2005Date of Patent: October 14, 2008Assignee: Sanyo Electric Co.Inventors: Shingo Tode, Hiroyuki Fujimoto, Yasufumi Takahashi, Akira Kinoshita, Kazuhiro Hasegawa, Shin Fujitani
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Patent number: 7435509Abstract: This invention relates to a positive electrode for an electrochemical cell or battery, and to an electrochemical cell or battery; the invention relates more specifically to a positive electrode for a non-aqueous lithium cell or battery when the electrode is used therein. The positive electrode includes a composite metal oxide containing AgV3O8 as one component and one or more other components consisting of LiV3O8, Ag2V4O11, MnO2, CFx, AgF or Ag2O to increase the energy density of the cell, optionally in the presence of silver powder and/or silver foil to assist in current collection at the electrode and to improve the power capability of the cell or battery.Type: GrantFiled: January 7, 2003Date of Patent: October 14, 2008Assignee: UChicago Argonne, LLCInventors: Michael M. Thackeray, John T. Vaughey, Dennis W. Dees
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Publication number: 20080248400Abstract: A positive electrode includes a current collector and a positive electrode active material layer. The positive electrode active material layer includes a positive electrode active material including a core including a compound LiaCO1?bMbO2 and a surface-treatment layer. In the core compound, 0.95?a?1.1, 0.002?b?0.02, and M is one or more elements selected from the group consisting of Mg, Ca, Sr, Ba, Ra, Sc, Y, Ti, Zr, Hf, Rf, V, Nb, Ta, Db, Cr, Mo, W, Sg, Tc, Re, Bh, Fe, Ru, Os, Hs, Rh, Ir, Pd, Pt, Cu, Ag, Au, Zn, Cd, B, Al, Ga, In, Tl, Si, Ge, Sn, P, As, Sb, Bi, S, Se, Te, Po. The surface-treatment layer includes a compound including element of P, and one or more elements selected from the group consisting of Mg, Ca, Sr, Ba, Ra, Sc, Y, Ti, Zr, Hf, Rf, V, Nb, Ta, Db, Cr, Mo, W, Sg, Tc, Re, Bh, Fe, Ru, Os, Hs, Rh, Ir, Pd, Pt, Cu, Ag, Au, Zn, Cd, B, Al, Ga, In, Ti, Si, Ge, Sn, As, Sb, Bi, S, Se, Te, Po.Type: ApplicationFiled: August 16, 2007Publication date: October 9, 2008Applicant: Samsung SDI Co., Ltd.Inventors: Duck-Chul HWANG, Yong-Chul Park, Jeom-Soo Kim, Jae-Yul Ryu, Jong-Hwa Lee, Euy-Young Jung, So-Hyun Hur
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Publication number: 20080248389Abstract: Negative active materials for rechargeable lithium batteries are provided. One negative active material includes a metal matrix, and an intermetallic compound including a Si active metal and an additive metal dispersed in the metal matrix. The intermetallic compound does not react with the metal matrix.Type: ApplicationFiled: March 21, 2008Publication date: October 9, 2008Inventors: Goo-Jin Jeong, Min-Sook Sung, Sang-Min Lee, Yong-Mook Kang, Wan-Uk Choi, Sung-Soo Kim
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Patent number: 7432015Abstract: The negative active material for a rechargeable lithium battery of the present invention includes a carbonaceous material and a silicon-based compound represented by Formula 1: Si(1-y)MyO1+x ??(1) where 0<y<1, ?0.5?x?0.5, and M is selected from the group consisting of Mg, Ca, and mixtures thereof.Type: GrantFiled: February 24, 2005Date of Patent: October 7, 2008Assignee: Samsung SDI Co., Ltd.Inventors: Goo-Jin Jeong, Sang-Min Lee, Sung-Soo Kim, Yoshiaki Nitta
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Publication number: 20080233477Abstract: According to a positive electrode for a lithium ion secondary battery comprising a current collector and a mixture layer containing a transition metal-containing complex oxide as a positive electrode active material formed on the current collector, wherein the mixture layer has surface roughness of 0.1 ?m or more and 0.5 ?m or less in terms of a Ra value and the mixture layer has a surface treated layer treated with a coupling agent on the surface, it is possible to obtain a positive electrode which is excellent in suppression of moisture absorption. By using the positive electrode, it is possible to obtain a lithium ion secondary battery which is excellent in storage characteristics and causes less battery swelling since the amount of a gas generated upon charging and discharging decreases.Type: ApplicationFiled: March 20, 2008Publication date: September 25, 2008Inventors: Keiichi TAKAHASHI, Kozo WATANABE, Kensuke NAKURA
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Publication number: 20080233481Abstract: To provide a positive electrode active material for a non-aqueous electrolyte secondary battery, which can achieve high capacity and high output simultaneously, and a non-aqueous electrolyte secondary battery using the same. A non-aqueous electrolyte secondary battery is obtained by using as a positive electrode, a positive electrode active material for a non-aqueous electrolyte secondary battery, which is expressed by the general formula: Lix(Ni1-yCoy)1-zMzO2 (0.98?x?1.10, 0.05?y?0.4, 0.01?z?0.2, M=at least one element selected from the group of Al, Zn, Ti and Mg), and which has a Li site occupancy of the Li site in crystal of 98.5% or more, and a metal site occupancy of the metal site of from 95% to 98% inclusive, obtained by Rietveld analysis.Type: ApplicationFiled: February 29, 2008Publication date: September 25, 2008Inventors: Ryuuichi Kuzuo, Atsushi Fukui, Katsuya Kase, Tomoyoshi Ueki, Kazuhiro Okawa, Syuhei Oda
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Patent number: 7422824Abstract: A positive electrode active material for a non-aqueous electrolyte secondary battery includes a particle of a composite oxide which contains Li and Co, wherein: the composite oxide further contains an element M1 and an element M2; the element M1 is at least one selected from the group consisting of Mg, Cu and Zn; the element M2 is at least one selected from the group consisting of Al, Ca, Ba, Sr, Y and Zr; the element M1 is uniformly distributed in the particle; and the element M2 is distributed in the surface portion of the particle more than in the inside thereof.Type: GrantFiled: April 30, 2003Date of Patent: September 9, 2008Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Shinji Arimoto, Takahiro Okuyama, Masatoshi Nagayama, Hiroshi Yoshizawa
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Publication number: 20080213665Abstract: A positive electrode active material of a nonaqueous electrolyte secondary battery according to an embodiment of the invention includes lithium cobalt compound oxide in which at least zirconium and magnesium are added, and lithium nickel manganese compound oxide having a layered structure. The lithium cobalt compound oxide contains at least two types of zirconium- and magnesium-added lithium cobalt compound oxides having zirconium added amounts different from each other. The charging potential of the positive electrode active material is more than 4.3 V and 4.6 V or less versus lithium. With such a constitution, a nonaqueous electrolyte secondary battery using a plurality of positive electrode active materials having different physical properties which not only is capable of being charged at a high charging voltage of more than 4.3 V and 4.6 V or less versus lithium, but also has excellent charging/discharging cycle property and excellent charged storage properties without lowering the battery capacity.Type: ApplicationFiled: February 29, 2008Publication date: September 4, 2008Applicant: SANYO ELECTRIC CO., LTD.Inventors: Nobumichi NISHIDA, Satoshi YAMAMOTO
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Patent number: 7416814Abstract: A lithium secondary battery, which comprises a positive electrode, a negative electrode containing a lithium ion-storable/dischargeable negative electrode-active material and a lithium ion conductive, non-aqueous electrolytic solution or polymer electrolyte can have distinguished charging/discharging characteristics and a higher safety, when the negative electrode material contains particles comprising carbonaceous materials and at least one of elements capable of forming a compound with Li; the elements have a melting point of at least 900° C. and a thermal expansion coefficient of not more than 9 ppm/K at room temperature; the particles are embedded in a plurality of layers of the carbonaceous materials; the particles being subjected to a mechanical treatment to make particle sizes of the particles smaller than the initial particle size in advance.Type: GrantFiled: December 31, 2002Date of Patent: August 26, 2008Assignees: Hitachi, Ltd., Hitachi Chemical Co., Ltd.Inventors: Junya Kaneda, Noriyuki Watanabe, Yasuhisa Aono, Seiji Takeuchi, Yasushi Muranaka, Kouichi Takei
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Publication number: 20080193841Abstract: Disclosed herein is a layered core-shell cathode active material for secondary lithium batteries, in which the core layer has a structural formula of Li1+a[MxMn1-x]2O4 (M is selected from a group consisting of Ni, Co, Mg, Zn, Ca, Sr, Cu, Zr, P, Fe, Al, Ga, In, Cr, Ge, Sn and combinations thereof, 0.01?x?0.25, 0?a?0.1) and the shell layer has a structural formula of Li1+a[MyMn1?y]2O4 (M? is selected from a group consisting of Ni, Mg, Cu, Zn and combinations thereof, 0.01?y?0.5, 0?a?0.1). In the layered cathode active material, the core layer, corresponding to a 4V spinel-type manganese cathode, functions to increase the capacity of the active material while the shell layer, corresponding to a 5 V spinel-type transition metal mix-based cathode, is electrochemically stable enough to prevent the reaction of the components with electrolytes and the dissolution of transition metals in electrolytes, thereby improving thermal and lifetime characteristics of the active material.Type: ApplicationFiled: March 31, 2006Publication date: August 14, 2008Inventors: Yang Kook Sun, Doo Kyun Lee, Sang Ho Park
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Publication number: 20080193845Abstract: A nonaqueous electrolyte secondary battery includes a positive electrode, a negative electrode, a porous insulating layer, and a nonaqueous electrolyte. The positive electrode contains, as a positive electrode active material, a phosphoric compound having an olivine structure and expressed by a general formula of LizFe1-yXyPO4 (0?y?0.3, 0<z?1) (X is one of metals selected from the group consisting of Nb, Mg, Ti, Zr, Ta, W, Mn, Ni, and Co). The negative electrode contains, as a negative electrode active material, a material capable of occluding and extracting lithium ion. The nonaqueous electrolyte is retained between the positive electrode and the negative electrode. The porous insulating layer is provided between the positive electrode and the negative electrode and contains metal oxide. The volume ratio of the metal oxide to the porous insulating layer is in the range between 15 vol % and 50 vol %, both inclusive.Type: ApplicationFiled: February 12, 2008Publication date: August 14, 2008Inventors: Yoshiyuki MURAOKA, Yukihiro Okada
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Publication number: 20080193846Abstract: A positive electrode for a nonaqueous electrolyte secondary battery using a positive electrode active material mixture according to an embodiment of the invention includes a positive electrode active material capable of intercalating and deintercalating a lithium ion, a conductive agent and a binder, in which the positive electrode active material is produced by coating cobalt-based lithium composite oxide represented by a general formula: LiaCo1-sM1sO2 with lithium nickel cobalt manganese oxide represented by a general formula: LibNitCouMnvO2, the ratio r1/r2 of the average particle diameter r1 of the cobalt-based lithium composite oxide and the average particle diameter r2 of the lithium nickel cobalt manganese oxide is 2?r1/r2?50, and the average particle diameter r2 of the lithium nickel cobalt manganese oxide is 0.5 ?m?r2?20 ?m.Type: ApplicationFiled: February 12, 2008Publication date: August 14, 2008Applicant: SANYO ELECTRIC CO., LTD.Inventor: Hideki Morishima
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Patent number: 7399552Abstract: Provided is a battery capable of improving charge-discharge cycle characteristics. The battery comprises a spirally wound electrode body in which a cathode and an anode are spirally wound with a separator in between. The capacity of the anode includes a capacity component by insertion and extraction of Li and a capacity component by precipitation and dissolution of Li metal, and is represented by the sum of them. Moreover, the anode includes a carbon material capable of obtaining a first peak within a range from 1580 cm?1 to 1620 cm?1 and a second peak within a range of 1350 cm?1 to 1370 cm?1 in a Raman spectrum analysis using argon laser light with a wavelength of 5145 nm, and having an intensity ratio IB/IA between the first peak and the second peak of 0.25 to 0.6, where the intensity of the first peak is IA and the intensity of the second peak is IB. Thereby, precipitation-dissolution efficiency of lithium metal and charge-discharge cycle characteristics can be improved.Type: GrantFiled: August 17, 2004Date of Patent: July 15, 2008Assignee: Sony CorporationInventors: Gentaro Kano, Karin Tsuda
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Publication number: 20080166637Abstract: A nonaqueous electrolyte battery includes a positive electrode, a negative electrode and a nonaqueous electrolyte. The negative electrode contains a titanium-containing oxide. The nonaqueous electrolyte contains a compound having a functional group represented by the formula (1) below and a sultone having an unsaturated hydrocarbon group. [Chem.Type: ApplicationFiled: December 27, 2007Publication date: July 10, 2008Inventors: Hiroki INAGAKI, Yumi Fujita, Norio Takami
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Publication number: 20080160410Abstract: Disclosed herein are double-layer cathode active materials comprising a nickel-based cathode active material as an inner layer material and a transition metal mixture-based cathode active material as an outer layer material facing an electrolyte. Since the nickel-based cathode active material as an inner layer material has high-capacity characteristics and the transition metal mixture-based cathode active material as an outer layer material facing an electrolyte has superior thermal safety, the double-layer cathode active materials have high capacity, high charge density, improved cycle characteristics and superior thermal safety.Type: ApplicationFiled: April 26, 2005Publication date: July 3, 2008Applicant: IUCF-HYU (Industry-University Cooperation Foundation Hanyang University)Inventors: Yang Kook Sun, Myung Hoon Kim, Shin Ho Suk
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Publication number: 20080160415Abstract: A lithium ion battery including a cathode provided with a cathode active material on a cathode current collector, an anode and an electrolyte solution, wherein the cathode active material layer contains nano-particles of ceramic is provided. The lithium ion battery suppresses the growth of a cathode film on the cathode, improves energy density and has excellent cycle characteristics.Type: ApplicationFiled: May 8, 2007Publication date: July 3, 2008Applicant: SONY CORPORATIONInventors: Shinya Wakita, Izaya Okae
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Publication number: 20080160412Abstract: In the non-aqueous electrolyte secondary battery of the present invention, the separator includes a heat-resistant resin having chlorine atoms as an end group and the positive electrode active material includes a lithium-containing complex oxide containing aluminum atoms in its composition. Even if the chlorine atoms are liberated into the non-aqueous electrolyte, aluminum contained in the positive electrode active material is selectively leached into the non-aqueous electrolyte, thereby suppressing the leaching of other component elements. Consequently, there can be obtained a non-aqueous electrolyte secondary battery excellent in safety and high temperature storage characteristics.Type: ApplicationFiled: March 9, 2006Publication date: July 3, 2008Inventors: Shinji Kasamatsu, Hajime Nishino, Hideharu Takezawa
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Publication number: 20080160414Abstract: Provided are a cathode active material for a non-aqueous electrolyte secondary battery with high operating voltage, high volume capacity density, high safety and excellent charge and discharge cyclic properties, and its production method. The cathode active material for a non-aqueous electrolyte secondary battery, which comprises a lithium-containing composite oxide powder, which is represented by the formula LipNxMyOzFa (wherein N is at least one element selected from the group consisting of Co, Mn and Ni, M is at least one element selected from the group consisting of Al, alkaline earth metal elements and transition metal elements other than the element N, 0.9?p?1.1, 0.965?x<1.00, 0<y?0.035, 1.9?z?2.1, x+y=1 and 0?a?0.02), a surface layer of which contains zirconium, and the surface layer within 5 nm of which has an atomic ratio (zirconium/the element N) of at least 1.0.Type: ApplicationFiled: March 13, 2008Publication date: July 3, 2008Applicant: AGC Seimi Chemical Co., Ltd.Inventors: Yukio Jitsugiri, Yukiko Amagasaki, Takeshi Kawasato, Naoshi Saito, Tokumitsu Kato, Yukimitsu Wakasugi
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Publication number: 20080153001Abstract: The positive active material according to one embodiment of the present invention includes a composite metal oxide of the following Formula 1, and a compound being capable of intercalating and deintercalating lithium having the composite metal oxide coated on the surface thereof. M1-xAlO2 [Chemical Formula 1] Wherein, in the above Formula 1, M is selected from the group consisting of an alkali metal, an alkaline-earth metal, and combinations thereof, and 0.03?x?0.95. The composite metal oxide increases impregnation of an electrolyte, improves lithium mobility, and decreases internal resistance of a rechargeable lithium battery, and thereby improves discharge capacity and cycle-life characteristics.Type: ApplicationFiled: August 8, 2007Publication date: June 26, 2008Applicant: L & F CO., LTD.Inventors: Jaephil CHO, Youn-Han Chang, Jin-Young Kim, Yoo-Jung Kim, Hyun-Jung Kim, Hae-Suk Hwang
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Patent number: 7390594Abstract: Primary and secondary Li-ion and lithium-metal based electrochemical cell system. The suppression of gas generation is achieved through the addition of an additive or additives to the electrolyte system of respective cell, or to the cell itself whether it be a liquid, a solid- or plastized polymer electrolyte system. The gas suppression additives are primarily based on unsaturated hydrocarbons.Type: GrantFiled: December 18, 2003Date of Patent: June 24, 2008Assignee: UChicago Argonne, LLCInventors: Ilias Belharouak, Khalil Amine
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Publication number: 20080145757Abstract: Provided are a porous anode active material, a method of preparing the same, and an anode and a lithium battery employing the same. The porous anode active material includes fine particles of metallic substance capable of forming a lithium alloy; a crystalline carboneous substance; and a porous carboneous material coating and attaching to the fine particles of metallic substance and the crystalline carboneous substance, the porous anode active material having pores exhibiting a bimodal size distribution with two pore diameter peaks as measured by a Barrett-Joyner-Halenda (BJH) pore size distribution from a nitrogen adsorption. The porous anode active material has the pores having a bimodal size distribution, and thus may efficiently remove a stress occurring due to a difference of expansion between a carboneous material and a metallic active material during charging and discharging.Type: ApplicationFiled: July 27, 2007Publication date: June 19, 2008Inventors: Sang-kook Mah, Han-su Kim, Dong-min Im
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Publication number: 20080138710Abstract: A composition for use in an electrochemical redox reaction is described. The composition may comprise a material represented by a general formula MyXO4 or AxMyXO4, where each of A (where present), M, and X independently represents at least one element, O represents oxygen, and each of x (where present) and y represent a number, and an oxide of at least one element, wherein the material and the oxide are cocrystalline, and/or wherein a volume of a crystalline structural unit of the composition is larger than a volume of a crystalline structural unit of the material alone. An electrode comprising such a composition is also described, as is an electrochemical cell comprising such an electrode. A process of preparing a composition for use in an electrochemical redox reaction is also described.Type: ApplicationFiled: November 14, 2007Publication date: June 12, 2008Inventors: Ben-Jie Liaw, Wen-Ren Liu, Sheng-Shih Chang
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Publication number: 20080131780Abstract: To provide a process for producing a lithium-containing composite oxide for a positive electrode of a lithium secondary battery, which has a large volume capacity density, high safety, excellent durability for charge and discharge cycles and excellent low temperature characteristics.Type: ApplicationFiled: December 7, 2007Publication date: June 5, 2008Applicant: AGC Seimi Chemical Co., Ltd.Inventors: Takeshi KAWASATO, Tokumitsu Kato, Naoshi Satio, Koji Tatsumi, Megumi Uchida, Remi Hiraki
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Patent number: 7381496Abstract: A composition having a formula LixMgyNiO2 wherein 0.9<x<1.3, 0.01<y<0.1, and 0.91<x+y<1.3 can be utilized as cathode materials in electrochemical cells. A composition having a core, having a formula LixMgyNiO2 wherein 0.9<x<1.3, 0.01<y<0.1, and 0.9<x+y<1.3, and a coating on the core, having a formula LiaCobO2 wherein 0.7<a<1.3, and 0.9<b<1.2, can also be utilized as cathode materials in electrochemical cells.Type: GrantFiled: May 21, 2004Date of Patent: June 3, 2008Assignee: Tiax LLCInventors: Per T. Onnerud, Jay Jie Shi, Sharon L. Dalton, Christina Lampe-Onnerud
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Patent number: 7381395Abstract: A positive electrode used in the non-aqueous electrolyte secondary battery of the present invention includes a hexagonal system lithium-containing cobalt composite oxide represented by the general expression ?LiCo1-XMXO2 (M=Zr, Mg, Al)? obtained by synthesizing a lithium compound as a lithium source with a cobalt compound as a cobalt source to which 0.01 mol % or more and 1.0 mol % or less of zirconium is added and magnesium and/or aluminum is added through coprecipitation, as the positive electrode active material, whereby the thermal stability, load performance and charging/discharging cycle performance characteristics of the non-aqueous electrolyte secondary battery are improved without lowering its capacity and charging/discharging efficiency.Type: GrantFiled: September 29, 2004Date of Patent: June 3, 2008Assignee: Sanyo Electric Co., Ltd.Inventors: Shinya Miyazaki, Nobumichi Nishida
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Patent number: 7381497Abstract: A positive electrode active material for a non-aqueous electrolyte secondary battery, comprising a lithium-containing composite oxide, wherein the composite oxide is represented by the general formula: LizCo1-x-yMgxMyO2, the element M included in the general formula is at least one selected from the group consisting of Al, Ti, Sr, Mn, Ni and Ca, the values x, y and z included in the general formula satisfy: (i) 0?z?1.03; (ii) 0.005?x?0.1; and (iii) 0.001?y?0.03, the composite oxide has a crystal structure attributed to a hexagonal system in an overcharged state having a potential over 4.25 V relative to metallic Li, and a maximum value of an oxygen generation peak in a gas chromatograph mass spectrometry measurement of the composite oxide in the overcharged state is in the range of 330 to 370° C.Type: GrantFiled: January 7, 2004Date of Patent: June 3, 2008Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Masatoshi Nagayama, Hiroshi Yoshizawa
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Publication number: 20080124630Abstract: Active materials for batteries are provided. According to an embodiment of the present invention, the active material includes a core material including a compound capable of electrochemical oxidation/reduction and a lithium ion conducting layer surrounding the core material. The lithium ion conducting layer includes a compound selected from the group consisting of lithium ion conductor, lithium ion conductive polymers, and mixtures thereof.Type: ApplicationFiled: August 10, 2007Publication date: May 29, 2008Inventors: Jeom-Soo Kim, Yong-Chul Park, Jong-Hwa Lee, So-Hyun Hur, Euy-Young Jung
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Publication number: 20080118833Abstract: A non-aqueous electrolyte secondary battery includes a positive electrode that contains a lithium composite oxide as an active material. The cut-off voltage of charge is set to 4.25 to 4.5 V. In a region where the positive electrode and the negative electrode face each other, the Wp/Wn ratio R is in the range from 1.3 to 19 where Wp is the weight of the active material contained in the positive electrode per unit area and Wn is the weight of the active material contained in the negative electrode per unit area. This battery is excellent in safety, cycle characteristics, and storage characteristics even when the cut-off voltage of charge in a normal operating condition is set to 4.25 V or more.Type: ApplicationFiled: November 16, 2005Publication date: May 22, 2008Inventors: Atsushi Ueda, Shoichiro Watanabe, Takeshi Yao, Takashi Takeuchi, Takayuki Shirane, Takaya Saito, Hiromi Nagata
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Publication number: 20080118844Abstract: A negative electrode yields a high-performance nonaqueous electrolyte secondary battery which has a high discharging capacity, high charging/discharging efficiency in the initial stage and during cyclic operation, and excellent properties in cyclic operation, and the electrode of which less expands after cyclic operation. The negative electrode includes an active material thin film which mainly contains a compound represented by a general formula SiZxMy, wherein Z, M, “x” and “y” satisfy the following conditions, of a phase including an element Z lying in a nonequilibrium state in silicon. The element Z is at least one element selected from the group consisting of boron, carbon, and nitrogen. The element M is other than silicon and the element Z and is at least one element selected from the elements of Groups 2, 4, 8, 9, 10, 11, 13, 14, 15, and 16 of the Periodic Table of Elements. The number “x” is such a value that a Z-concentration ratio Q(Z) falls within the range of 0.10 to 0.95.Type: ApplicationFiled: June 6, 2005Publication date: May 22, 2008Applicant: MITSUBISHI CHEMICAL CORPORATIONInventors: Yukihiro Miyamoto, Masao Miyake, Etsuko Miyake, Tooru Fuse, Tomohiro Satou, Youji Arita
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Publication number: 20080118836Abstract: A positive electrode including a current collector; a positive active material layer disposed on the current collector; and a coating layer disposed on the positive active material layer. The coating layer includes a binder and a inorganic additive. The binder is a poly(vinylidenefluoride-hexafluoropropylene) copolymer comprising 2 to 16 mole % of hexafluoropropylene. The positive electrode for a rechargeable lithium battery suppresses side-reactions between a positive electrode and an electrolyte, at a high voltage.Type: ApplicationFiled: November 14, 2007Publication date: May 22, 2008Inventors: Duck-Chul Hwang, Yong-Chul Park, Jeom-Soo Kim, Jae-Yul Ryu, Jong-Hwa Lee, Euy-Young Jung, So-Hyun Hur
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Publication number: 20080113270Abstract: An anode capable of preventing expansion of an anode active material layer and a battery using it are provided. The anode includes an anode current collector, and an anode active material layer containing silicon (Si) as an element, wherein the anode active material layer therein contains at least one selected from the group consisting of a fluoride of an alkali metal and a fluoride of an alkali earth metal.Type: ApplicationFiled: March 12, 2007Publication date: May 15, 2008Inventors: Takakazu Hirose, Kenichi Kawase, Isamu Konishiike, Masayuki Iwama
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Patent number: 7368095Abstract: The present invention provides a composite oxide for a high performance solid oxide fuel cell which can be fired at a relatively low temperature, and which has little heterogeneous phases of impurities other than the desired composition. The composite oxide is the one having a perovskite type crystal structure containing rare earth elements, and having constituent elements homogeneously dispersed therein. A homogeneous composite oxide having an abundance ratio of heterogeneous phases of at most 0.3% by average area ratio, and a melting point of at least 1470° C., is obtained by using metal carbonates, oxides or hydroxides, and reacting them with citric acid in an aqueous system.Type: GrantFiled: November 15, 2002Date of Patent: May 6, 2008Assignee: Seimi Chemical Co., Ltd.Inventors: Fumio Munakata, Kenji Furuya, Masaharu Hatano, Yoshinori Fujie, Manabu Suhara
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Patent number: 7364793Abstract: The present invention provides a powdered lithium transition metal oxide useful as a major component for cathode active material of rechargeable lithium batteries, comprising a lithium transition metal oxide particle, a doped interface layer formed near the surface of the particle, and a thermodynamically and mechanically stable outer layer, and a method of preparing the same.Type: GrantFiled: September 24, 2004Date of Patent: April 29, 2008Assignee: LG Chem, Ltd.Inventors: Jens M. Paulsen, Munju Kim, Joon Sung Bae, Jaeup Jang, Hong-Kyu Park
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Patent number: 7335446Abstract: Cycle performance is improved without degrading initial efficiency of a non-aqueous electrolyte secondary battery that includes a positive electrode, a negative electrode, a non-aqueous electrolyte containing a solute and a solvent, the positive electrode including a positive electrode active material made of a lithium-containing transition metal oxide that contains lithium and cobalt and has a layered structure. The lithium-containing transition metal oxide is at least partially covered with a surface-treatment layer containing a phosphate compound represented by the chemical formula M1POk, where M1 is at least one element that can have a valency of 3 and k is an integer in a range of 2 to 4, and the lithium-containing transition metal oxide contains a group IVA element M2 and a group IIA element M3 of the periodic table.Type: GrantFiled: February 23, 2005Date of Patent: February 26, 2008Assignee: SANYO Electric Co., Ltd.Inventors: Takanobu Chiga, Katsunori Yanagida, Atsushi Yanai, Yoshinori Kida
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Patent number: 7335445Abstract: A particulate positive electrode active material for an alkaline storage battery comprising: (a) solid solution nickel hydroxide particles containing at least magnesium and (b) a coating layer comprising cobalt oxide being formed on the surface of the solid solution nickel hydroxide particles. The amount of magnesium contained in the solid solution nickel hydroxide particles (a) is not smaller than 2 mol % and not larger than 15 mol % of the total amount of metal elements contained in the solid solution nickel hydroxide particles (a). BET specific surface area of the solid solution nickel hydroxide particles (a) measured by nitrogen gas adsorption is not smaller than 5 m2/g and not larger than 15 m2/g. The coating layer (b) further comprises at least one element Xs selected from the group consisting of yttrium, ytterbium, lutetium, titanium and calcium.Type: GrantFiled: December 6, 2002Date of Patent: February 26, 2008Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Hiroyuki Sakamoto, Hidekatsu Izumi, Yoichi Izumi
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Patent number: 7332248Abstract: A method of manufacturing a non-aqueous electrolyte secondary battery is provided wherein the positive electrode is made from a lithium-metal composite oxide represented by the general formula Lix(Ni1-y, Coy)1-zMzO2 (0.98?x?1.10, 0.05?y?0.4, 0.01?z?0.2, in which M represents at least one element selected from the group consisting of Al, Mg, Mn, Ti, Fe, Cu, Zn and Ga), and having an average particle diameter of 5 ?m to 10 ?m a C-amount of 0.14 wt % or less measured by way of the high-frequency heating-IR absorption method, and a Karl Fischer moisture content of 0.2 wt % or less when heated to 180° C. and the method comprising the steps of applying a paste of active material for positive electrode to electrode plate to make an electrode, then drying the electrode, and pressing and then installing the electrode in a battery, in a work atmosphere having an absolute moisture content of 10 g/m3 or less.Type: GrantFiled: December 19, 2003Date of Patent: February 19, 2008Assignees: Sumitomo Metal Mining Co., Ltd., Toyota Jidosha Kabushiki Kaisha, Denso CorporationInventors: Katsuya Kase, Shigeki Kubo, Hirofumi Iisaka, Ko Nozaki, Satoru Suzuki, Manabu Yamada
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Publication number: 20080008937Abstract: Primary alkaline batteries containing pentavalent bismuth metal oxides are disclosed.Type: ApplicationFiled: July 10, 2006Publication date: January 10, 2008Inventors: Cahit Eylem, Paul A. Christian, Yichun Wang, Joseph E. Sunstrom, In Tae Bae
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Patent number: 7314684Abstract: A positive electrode active material for lithium-ion rechargeable batteries of general formula Li1+xNi?Mn?A?O2 and further wherein A is Mg, Zn, Al, Co, Ga, B, Zr, or Ti and 0<x<0.2, 0.1???0.5, 0.4???0.6, 0???0.1 and a method of manufacturing the same. Such an active material is manufactured by employing either a solid state reaction method or an aqueous solution method or a sol-gel method which is followed by a rapid quenching from high temperatures into liquid nitrogen or liquid helium.Type: GrantFiled: March 12, 2004Date of Patent: January 1, 2008Assignee: U Chicago Argonne LLCInventors: Sun-Ho Kang, Khalil Amine
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Patent number: 7314682Abstract: An uncycled electrode for a non-aqueous lithium electrochemical cell including a lithium metal oxide having the formula Li(2+2x)/(2+x)M?2x/(2+x)M(2?2x)/(2+x)O2??, in which 0?x<1 and ? is less than 0.2, and in which M is a non-lithium metal ion with an average trivalent oxidation state selected from two or more of the first row transition metals or lighter metal elements in the periodic table, and M? is one or more ions with an average tetravalent oxidation state selected from the first and second row transition metal elements and Sn. Methods of preconditioning the electrodes are disclosed as are electrochemical cells and batteries containing the electrodes.Type: GrantFiled: April 15, 2004Date of Patent: January 1, 2008Assignee: UChicago Argonne, LLCInventors: Michael M. Thackeray, Jeom-Soo Kim, Christopher S. Johnson