Patents by Inventor Hisaki Tarui
Hisaki Tarui has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 8980474Abstract: A lithium secondary battery includes a positive electrode, a negative electrode, and an electrolyte. The negative electrode includes a current collector, an active material layer on the current collector and including an amorphous silicon oxide represented by SiOx (0.95<x<1.7), and an SEI layer on the active material layer and including about 70 area % or more of protrusion parts having a size of about 5 nm to 300 nm during charging of the battery.Type: GrantFiled: March 29, 2012Date of Patent: March 17, 2015Assignee: Samsung SDI Co., Ltd.Inventors: Tae-Gon Kim, Hee-Joon Chun, Joon-Sup Kim, Wan-Uk Choi, Hisaki Tarui, Jea-Woan Lee, Jae-Yul Ryu, Young-Chang Lim, Seung-Hee Park
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Publication number: 20130052508Abstract: A lithium secondary battery includes a positive electrode, a negative electrode, and an electrolyte. The negative electrode includes a current collector, an active material layer on the current collector and including an amorphous silicon oxide represented by SiOx (0.95<x<1.7), and an SEI layer on the active material layer and including about 70 area % or more of protrusion parts having a size of about 5 nm to 300 nm during charging of the battery.Type: ApplicationFiled: March 29, 2012Publication date: February 28, 2013Inventors: Tae-Gon Kim, Hee-Joon Chun, Joon-Sup Kim, Wan-Uk Choi, Hisaki Tarui, Jea-Woan Lee, Jae-Yul Ryu, Young-Chang Lim, Seung-Hee Park
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Publication number: 20130045419Abstract: Provided are a negative active material for a rechargeable lithium battery, which includes a first silicon oxide (SiOx) and a second silicon oxide (SiOx) with a particle diameter differing from the one of the first silicon oxide (SiOx), a negative electrode including the negative active material, and a method of manufacturing the negative electrode, and a rechargeable lithium battery including the negative electrode. The first silicon oxide (SiOx) and second silicon oxide (SiOx) have a particle distribution peak area ratio ranging from 3 to 8.Type: ApplicationFiled: December 19, 2011Publication date: February 21, 2013Inventors: Hee-Joon Chun, Tae-Gon Kim, Joon-Sup Kim, Wan-Uk Choi, Hisaki Tarui, Jea-Woan Lee, Jae-Yul Ryu, Chang-Keun Back, Young-Chang Lim, Seung-Hee Park
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Patent number: 7794881Abstract: An electrode for a lithium battery having a thin film composed of active material capable of lithium storage and release, e.g., a microcrystalline or amorphous silicon thin film, provided on a current collector, the electrode being characterized in that a constituent of the current collector is diffused into the thin film.Type: GrantFiled: October 20, 2000Date of Patent: September 14, 2010Assignee: Sanyo Electric Co., Ltd.Inventors: Masahisa Fujimoto, Shin Fujitani, Masaki Shima, Hiromasa Yagi, Hisaki Tarui, Hiroshi Kurokawa, Shigeki Matsuta, Yoichi Domoto, Yoshio Kato, Hiroshi Nakajima, Hiroaki Ikeda, Kenji Asaoka, Ryuji Ohshita
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Patent number: 7524583Abstract: A non-aqueous electrolyte secondary cell is provided with a positive electrode, a negative electrode, and a non-aqueous electrolyte solution, wherein said positive electrode comprises sulfur and said non-aqueous electrolyte solution comprises a room-temperature molten salt having a melting point of 60° C. or less.Type: GrantFiled: December 20, 2002Date of Patent: April 28, 2009Assignee: Sanyo Electric Co., Ltd.Inventors: Masahide Miyake, Masahisa Fujimoto, Hideyuki Koga, Hisaki Tarui, Shin Fujitani
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Patent number: 7410728Abstract: An electrode for lithium batteries, in which a thin film of active material capable of storage and release of lithium, such as a microcrystalline or amorphous silicon thin film, is provided, through an interlayer, on a current collector, the electrode being characterized in that the interlayer comprises a material alloyable with the thin film of active material.Type: GrantFiled: October 20, 2000Date of Patent: August 12, 2008Assignee: Sanyo Electric Co., Ltd.Inventors: Masahisa Fujimoto, Shin Fujitani, Masaki Shima, Hiromasa Yagi, Hisaki Tarui, Hiroshi Kurokawa, Shigeki Matsuta, Yoichi Domoto, Yoshio Kato, Hiroshi Nakajima, Hiroaki Ikeda, Kenji Asaoka, Ryuji Ohshita
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Patent number: 7407725Abstract: In a non-aqueous electrolyte secondary cell including a positive electrode, a negative electrode and a non-aqueous electrolyte, the negative electrode includes a material capable of absorbing or releasing lithium and wherein the non-aqueous electrolyte contains a room-temperature molten salt having a melting point of 60° C. or less and a lithium salt.Type: GrantFiled: October 21, 2002Date of Patent: August 5, 2008Assignee: Sanyo Electric Co., Ltd.Inventors: Masahide Miyake, Masahisa Fujimoto, Hideyuki Koga, Hisaki Tarui, Shin Fujitani, Masaharu Itaya
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Patent number: 7297446Abstract: A negative electrode for a rechargeable lithium battery which is obtained by sintering under a non-oxidizing atmosphere, in the form of a layer on a surface of a metal foil current collector, an anode mix containing a binder and particles of active material containing silicon and/or a silicon alloy; the negative electrode being characterized in that the metal foil current corrector has projections and recesses on its surface, the projection is shaped to have a recurved side face portion that curves more outwardly as it extends closer to a distal end of the projection, and the binder penetrates into spaces defined by the recurved side face portions.Type: GrantFiled: March 26, 2004Date of Patent: November 20, 2007Assignee: Sanyo Electric Co., Ltd.Inventors: Atsushi Fukui, Mariko Torimae, Yasuyuki Kusumoto, Hisaki Tarui
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Patent number: 7294359Abstract: A method of manufacturing an electrode for a secondary cell capable of readily forming an active material layer only on a necessary portion of a collector by a method supplying raw material from a gas phase is obtained. This method of manufacturing an electrode for a secondary cell comprises steps of forming a mask layer containing a material reduced in adhesion to a collector due to a high temperature for forming an active material layer on a prescribed region of the collector, forming the active material layer on the collector and on the mask layer by a method supplying raw material from a gas phase and removing the mask layer and part of the active material layer formed on the mask layer. Thus, the mask layer is readily separated from the collector after the active material layer is formed by the method supplying raw material from a gas phase.Type: GrantFiled: April 16, 2002Date of Patent: November 13, 2007Assignee: Sanyo Electric Co., Ltd.Inventors: Daizo Jito, Hisaki Tarui
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Patent number: 7241533Abstract: An electrode for a rechargeable lithium battery characterized in that thin films of active material capable of lithium storage and release, i.e., microcrystalline or amorphous silicone thin films are deposited on opposite faces of a plate-form current collector.Type: GrantFiled: October 20, 2000Date of Patent: July 10, 2007Assignee: Sanyo Electric Co., Ltd.Inventors: Hiroaki Ikeda, Masahisa Fujimoto, Shin Fujitani, Kenji Asaoka, Shigeki Matsuta, Yoichi Domoto, Ryuji Ohshita, Masaki Shima, Hiromasa Yagi, Hisaki Tarui, Hiroshi Kurokawa, Yoshio Kato, Hiroshi Nakajima, Toshikazu Yoshida
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Patent number: 7235330Abstract: An electrode for a lithium battery having a thin film composed of active material capable of lithium storage and release, e.g., a microcrystalline or amorphous silicon thin film, provided on a current collector, the electrode being characterized in that the current collector has a surface roughness Ra of 0.01 ?m or greater.Type: GrantFiled: October 20, 2000Date of Patent: June 26, 2007Assignee: Sanyo Electric Co., Ltd.Inventors: Masahisa Fujimoto, Shin Fujitani, Masaki Shima, Hiromasa Yagi, Hisaki Tarui, Hiroshi Kurokawa, Shigeki Matsuta, Yoichi Domoto, Yoshio Kato, Hiroshi Nakajima, Hiroaki Ikeda, Kenji Asaoka, Ryuji Ohshita
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Patent number: 7195842Abstract: In an electrode for a lithium battery having a lithium storing and releasing active thin film provided on a current collector, such as a microcrystalline or amorphous silicon thin film, the electrode is characterized in that the thin film is divided into columns by gaps formed therein in a manner to extend in its thickness direction and that the columnar portions are at their bottoms adhered to the current collector.Type: GrantFiled: October 20, 2000Date of Patent: March 27, 2007Assignee: Sanyo Electric Co., Ltd.Inventors: Masahisa Fujimoto, Shin Fujitani, Masaki Shima, Hiromasa Yagi, Hisaki Tarui, Hiroshi Kurokawa, Shigeki Matsuta, Yoichi Domoto, Yoshio Kato, Hiroshi Nakajima, Hiroaki Ikeda, Kenji Asaoka, Ryuji Ohshita
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Patent number: 7192673Abstract: An electrode for a rechargeable lithium battery which includes a thin film composed of active material that expands and shrinks as it stores and releases lithium, e.g., a microcrystalline or amorphous silicon thin film, deposited on a current collector, characterized in that said current collector exhibits a tensile strength (=tensile strength (N/mm2) per sectional area of the current collector material×thickness (mm) of the current collector) of not less than 3.82 N/mm.Type: GrantFiled: October 20, 2000Date of Patent: March 20, 2007Assignee: Sanyo Electric Co., Ltd.Inventors: Hiroaki Ikeda, Masahisa Fujimoto, Shin Fujitani, Masaki Shima, Hiromasa Yagi, Hisaki Tarui, Hiroshi Kurokawa, Kenji Asaoka, Shigeki Matsuta, Yoichi Domoto, Ryuji Ohshita, Yoshio Kato, Hiroshi Nakajima, Yasuyuki Kusumoto
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Patent number: 7160646Abstract: An electrode for lithium secondary battery having a current collector and, deposited thereon, a thin film comprising silicon as a main component, characterized in that the thin film comprising silicon contains at least one of the elements belonging to the groups IIIa, Iva, Va, VIa, VIIa, VIII, Ib and IIb in the fourth, fifth and sixth periods of the Periodic Table (exclusive of copper (Cu)) at least in the surface portion thereof.Type: GrantFiled: March 4, 2002Date of Patent: January 9, 2007Assignee: Sanyo Electric Co., Ltd.Inventors: Ryuji Ohshita, Taeko Ota, Maruo Kamino, Hisaki Tarui, Masahisa Fujimoto, Shin Fujitani, Katsunobu Sayama
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Patent number: 7153611Abstract: A lithium secondary battery comprising an electrode in which an active material layer which includes an active material that electrochemically occludes and releases lithium is formed on a current collector, wherein cracks are formed in the active material layer by occlusion and release of lithium ions and thereafter a solid electrolyte is formed in the cracks in the active material layer.Type: GrantFiled: September 30, 2003Date of Patent: December 26, 2006Assignee: Sanyo Electric Co., Ltd.Inventors: Hiroshi Minami, Katsunobu Sayama, Hiromasa Yagi, Atsushi Fukui, Mariko Torimae, Yasuyuki Kusumoto, Hisaki Tarui
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Patent number: 7105253Abstract: A method of manufacturing a lithium secondary cell capable of preventing an active material layer from oxidation and moisture absorption is obtained. This method of manufacturing a lithium secondary cell comprises steps of forming an active material layer on a collector by a method supplying raw material through discharge into a vapor phase and holding the collector formed with the active material layer at least under an inert atmosphere or under a vacuum atmosphere up to preparation of the cell. Thus, the collector formed with the active material layer is prevented from exposure to the atmosphere, whereby the active material layer is prevented from oxidation and moisture absorption. Consequently, a lithium secondary cell having excellent characteristics can be prepared.Type: GrantFiled: June 24, 2002Date of Patent: September 12, 2006Assignee: Sanyo Electric Co., Ltd.Inventors: Daizo Jito, Hisaki Tarui
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Patent number: 6979516Abstract: A lithium secondary battery comprises a negative electrode containing lithium metal or a material previously storing lithium as an active material, a positive electrode containing a positive active material, and an electrolyte containing a non-aqueous electrolyte solution. The positive active material is a thin film formed by depositing on a substrate from vapor phase or liquid phase and including an oxide containing at least iron as a main constituent by a sputtering method, a reactive deposition method, a vacuum deposition method, a chemical vapor deposition method, a spraying method, a plating method, or a method in combination of these methods.Type: GrantFiled: January 28, 2002Date of Patent: December 27, 2005Assignee: Sanyo Electric Co., Ltd.Inventors: Yasuyuki Kusumoto, Masahisa Fujimoto, Shin Fujitani, Yoichi Domoto, Daizo Jito, Hisaki Tarui
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Patent number: 6921463Abstract: An electrode for a lithium secondary cell capable of attaining excellent charge/discharge characteristics with high discharge capacity is obtained by properly controlling a component of a collector diffusing into active material layers formed on both sides of the collector. Embodiments include forming a first active material layer consisting of a plurality of layers on a first surface of a collector, and forming a second active material layer consisting of a plurality of layers on a second surface of the collector. At least one layer constituting the second active material layer is formed before forming all layers constituting the first active material layer, thereby preventing heat for forming at least one of the layers constituting the second active material layer from being applied to all layers constituting the first active material layer.Type: GrantFiled: June 19, 2002Date of Patent: July 26, 2005Assignee: Sanyo Electric Co., Ltd.Inventors: Katsunobu Sayama, Hisaki Tarui
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Patent number: 6899918Abstract: A method for manufacturing an electrode for a lithium secondary battery includes a step of forming an oxide film other than a natural oxide film on a current collector by oxidizing the surface of the current collector, and a step of forming an active material layer on the oxide film by a method to provide a material for the active material layer by emitting in the vapor phase, such as PVD (physical vapor deposition) including sputtering, vapor evaporation, and the like, and CVD (chemical vapor deposition) including plasma CVD.Type: GrantFiled: January 17, 2003Date of Patent: May 31, 2005Assignee: Sanyo Electric Co., Ltd.Inventors: Hiromasa Yagi, Hisaki Tarui
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Patent number: 6887511Abstract: A method for preparing an electrode material for a lithium battery, characterized in that a noncrystalline silicon thin film that serves as an active material is deposited on a substrate.Type: GrantFiled: October 20, 2000Date of Patent: May 3, 2005Assignee: Sanyo Electric Co., Ltd.Inventors: Masaki Shima, Hiromasa Yagi, Hisaki Tarui, Hiroaki Ikeda, Masahisa Fujimoto, Shin Fujitani, Yoichi Domoto