Patents by Inventor Tatsuhiro Fukuzawa
Tatsuhiro Fukuzawa 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: 6926852Abstract: A cell plate structure for a solid oxide electrolyte type fuel cell is provided with a lower electrode layer, an upper electrode layer provided in opposition to the lower electrode layer, a solid electrolyte layer provided between the lower electrode layer and the upper electrode layer, and an area provided in at least one of the lower electrode layer and the upper electrode layer. The area has a portion which is formed by removing a substance, contained in the at least one of the lower electrode layer and the upper electrode layer during formation thereof, after the at least one of the lower electrode layer and the upper electrode layer has been formed. Such a fuel cell plate structure can be applied to a solid electrolyte fuel cell representatively by being disposed between a pair of separators that have gas flow passages supplying the lower electrode layer and the upper electrode layer with gasses, respectively.Type: GrantFiled: August 12, 2002Date of Patent: August 9, 2005Assignee: Nissan Motor Co., Ltd.Inventors: Fuminori Satou, Mitsugu Yamanaka, Makoto Uchiyama, Masaharu Hatano, Keiko Kushibiki, Naoki Hara, Tatsuhiro Fukuzawa, Itaru Shibata
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Patent number: 6896989Abstract: An SOFC is provided with an oxidizing electrode layer, a reducing electrode layer opposite to the oxidizing electrode layer, a solid electrolyte layer between the oxidizing electrode layer and the reducing electrode layer, and an alternating laminated structural section between the oxidizing electrode layer and the solid electrolyte layer or between the reducing electrode layer and the solid electrolyte layer. The alternating laminated structural section has a first thin film layer including a material of corresponding one of the electrode layers and a second thin film layer having a phase including the material of the corresponding one of the electrode layers and that of the solid electrolyte layer. The first thin film layer and the second thin film layer are alternately laminated.Type: GrantFiled: August 14, 2002Date of Patent: May 24, 2005Assignee: Nissan Motor Co., Ltd.Inventors: Naoki Hara, Mitsugu Yamanaka, Fuminori Satou, Masaharu Hatano, Keiko Kushibiki, Tatsuhiro Fukuzawa, Itaru Shibata, Makoto Uchiyama
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Patent number: 6893760Abstract: A single cell for a fuel cell in which an air electrode or a fuel electrode includes at least two layers. The air electrode includes an adhering cathode layer formed on one surface of the solid electrolyte layer and configured to show a function to allow the air electrode and the solid electrolyte layer to adhere electrically and mechanically to each other, and an electricity collecting cathode layer formed on the adhering cathode layer and configured to show an electricity collecting function of the air electrode. Alternatively, the fuel electrode includes an adhering anode layer formed on the other surface of the solid electrolyte layer and configured to show a function to allow the fuel electrode and the solid electrolyte layer to adhere electrically and mechanically to each other, and an electricity collecting anode layer formed on the adhering anode layer and configured to show an electricity collecting function.Type: GrantFiled: January 17, 2002Date of Patent: May 17, 2005Assignee: Nissan Motor Co., Ltd.Inventors: Itaru Shibata, Tatsuo Sugiyama, Masaharu Hatano, Mitsugu Yamanaka, Makoto Uchiyama, Tatsuhiro Fukuzawa, Naoki Hara, Keiko Kushibiki, Fuminori Satou
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Publication number: 20040161667Abstract: A bipolar battery comprises: a plurality of bipolar electrodes; electrolyte layers formed between adjacent ones of the plurality of bipolar electrodes, respectively; sealing portions surrounding and sealing the electrolyte layers, respectively; and contributing members contributing to keeping gaps between the adjacent ones of the plurality of bipolar electrodes, respectively. The contributing members are disposed within areas of the sealing portions, respectively.Type: ApplicationFiled: January 20, 2004Publication date: August 19, 2004Applicant: NISSAN MOTOR CO., LTD.Inventors: Tatsuhiro Fukuzawa, Kouichi Nemoto, Kenji Hosaka
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Patent number: 6761997Abstract: A positive electrode active material for a nonaqueous electrolyte secondary battery includes at least a lithium-containing manganese layered composite oxide represented by the formula Li1-xAxMnO2, or the formula Li1-xAxMn1-yMyO2. The lithium-containing manganese composite oxide includes a lithium substitute metal A, such as Na, K, Ag, substituting for part of Li. The lithium substitution quantity x may be in the range of 0.03<x≦0.2.Type: GrantFiled: February 26, 2001Date of Patent: July 13, 2004Assignees: Nissan Motor Co., Ltd., Seimi Chemical Co., Ltd.Inventors: Fumio Munakata, Tatsuhiro Fukuzawa, Yasuhiko Ohsawa, Yuuji Tanjo, Takuya Mihara, Takashi Kimura, Kazuo Sunahara, Manabu Suhara
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Publication number: 20040096740Abstract: In the bipolar battery, any one of a positive electrode active material layer and a negative electrode active material layer is made of a changeable electrode active material, and the other is made of an unchangeable electrode active material. The changeable electrode active material is an active material having a characteristic in which, once a maximum charging capacity of the changeable electrode active material is almost reached during charge, a change in voltage of the changeable electrode active material becomes greater than that before the maximum charging capacity thereof is almost reached, and the unchangeable electrode active material is an active material having a characteristic in which, even when the maximum charging capacity of the changeable electrode active material is almost reached during the charge, a voltage of the unchangeable electrode active material is almost the same as that before the maximum charging capacity of the changeable electrode active material is almost reached.Type: ApplicationFiled: October 6, 2003Publication date: May 20, 2004Applicant: NISSAN MOTOR CO., LTD.Inventors: Tatsuhiro Fukuzawa, Kouichi Nemoto
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Publication number: 20040091771Abstract: A bipolar battery comprises a bipolar electrode in which a positive electrode is provided on one surface of a collector and a negative electrode is provided on the other surface of the collector, a gel electrolyte sandwiched between the positive electrode and the negative electrode, and a sealing layer which is provided between the collectors and surrounds a periphery of a single cell including the positive electrode, the negative electrode, and the gel electrolyte.Type: ApplicationFiled: October 9, 2003Publication date: May 13, 2004Applicant: NISSAN MOTOR CO., LTD.Inventors: Kenji Hosaka, Tatsuhiro Fukuzawa, Kouichi Nemoto
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Publication number: 20040086781Abstract: A polymer battery is provided with a positive electrode active material layer, a negative electrode active material layer placed in opposition to the positive electrode active material layer, a polymer electrolyte layer disposed between the positive electrode active material layer and the negative electrode active material layer, and a distance defining member included in the polymer electrolyte layer to define a distance between the positive electrode active material layer and the negative electrode active material layer.Type: ApplicationFiled: September 10, 2003Publication date: May 6, 2004Applicant: NISSAN MOTOR CO., LTDInventors: Tatsuhiro Fukuzawa, Kouichi Nemoto
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Publication number: 20040072078Abstract: A stacked battery comprises a sheet electrode including a collector, and an electrolyte layer placed between the electrodes. In the stacked battery, an electrode stacked body is formed by stacking the electrode and the electrolyte layer, and the electrodes are placed on outermost layers of the electrode stacked body in such a manner so that the collectors are exposed to the outside of the stacked battery in the stacking direction of the electrode stacked body and function as terminals.Type: ApplicationFiled: September 22, 2003Publication date: April 15, 2004Applicant: NISSAN MOTOR CO., LTD.Inventors: Tatsuhiro Fukuzawa, Kouichi Nemoto
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Publication number: 20040038123Abstract: A stack type battery is provided with a plurality of unit cells stacked in a stack direction to be connected in series, and shared voltage measurement tab electrodes formed on the plurality of unit cells, respectively, to allow voltages to be measured for the plurality of unit cells such that the shared voltage measurement tab electrodes are disposed at deviated positions on a side surface of the stack type battery in a direction intersecting the stack direction.Type: ApplicationFiled: August 21, 2003Publication date: February 26, 2004Applicant: NISSAN MOTOR CO., LTD.Inventors: Yasunari Hisamitsu, Tatsuhiro Fukuzawa, Kouichi Nemoto, Yasuhiko Ohsawa
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Patent number: 6623890Abstract: A positive electrode active material for a nonaqueous electrolyte secondary battery includes at least a lithium-containing manganese layered composite oxide represented by the general formula Li1-xMn1-yMyO2-&dgr;. The lithium-containing manganese composite oxide is deficient in lithium with respect to the stoichiometric composition of a layered crystal structure represented by the general formula LiMeO2. Part of Mn is replaced by a substitute metal such as Co, Ni, Fe, Al, Ga, In, V, Nb, Ta, Ti, Zr, Ce or Cr.Type: GrantFiled: February 26, 2001Date of Patent: September 23, 2003Assignees: Nissan Motor Co., Ltd., Seimi Chemical Co., Ltd.Inventors: Fumio Munakata, Tatsuhiro Fukuzawa, Yasuhiko Ohsawa, Yuuji Tanjo, Takuya Mihara, Takashi Kimura, Kazuo Sunahara, Manabu Suhara
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Patent number: 6613478Abstract: A positive electrode active material for a nonaqueous electrolyte secondary battery includes at least a lithium-deficient manganese layered composite oxide represented by the general formula Li1-xMnO2-&dgr;. A lithium deficiency quantity x is in the range of 0.03<x≦0.5. An oxygen nonstoichiometry quantity &dgr; is equal to or smaller than 0.2.Type: GrantFiled: February 26, 2001Date of Patent: September 2, 2003Assignees: Nissan Motor Co., Ltd., Seimi Chemical Co., Ltd.Inventors: Fumio Munakata, Tatsuhiro Fukuzawa, Yasuhiko Ohsawa, Yuuji Tanjo, Takuya Mihara, Takashi Kimura, Kazuo Sunahara, Manabu Suhara
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Patent number: 6613479Abstract: A positive electrode active material for a nonaqueous electrolyte secondary battery includes at least a lithium-containing manganese layered composite oxide represented by the general formula Li1-xMO2-y-&dgr;Fy. The second metallic element or constituent M may be Mn or a combination of Mn and substitute metal such as Co, Ni, Cr, Fe, Al, Ga or In. A lithium deficiency quantity x is in the range of 0<x<1. An oxygen defect quantity &dgr; may be equal to or smaller than 0.2. A quantity y of fluorine substituting for part of oxygen is greater than zero.Type: GrantFiled: February 26, 2001Date of Patent: September 2, 2003Assignees: Nissan Motor Co., Ltd., Seimi Chemical Co., Ltd.Inventors: Tatsuhiro Fukuzawa, Fumio Munakata, Yasuhiko Ohsawa, Yuuji Tanjo, Takuya Mihara, Takashi Kimura, Kazuo Sunahara, Manabu Suhara
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Publication number: 20030104268Abstract: A unit cell for a solid electrolyte type fuel cell is provided with a fuel electrode, an air electrode making a pair with the fuel electrode, a solid electrolyte interposed between the fuel electrode and the air electrode, a porous metallic base body disposed on at lease one of a surface of the fuel electrode on the far side from the solid electrolyte and a surface of the air electrode on the far side from the solid electrolyte such that the fuel electrode, the electrolyte, and a plurality of concave portions formed in the porous metallic base body so as to extend, in a laminating direction in which the fuel electrode, the electrolyte, the air electrode and the porous metallic base body are laminated, from a surface of the porous metallic base body.Type: ApplicationFiled: November 25, 2002Publication date: June 5, 2003Applicant: Nissan Motor Co., Ltd.Inventors: Itaru Shibata, Masaharu Hatano, Tatsuhiro Fukuzawa, Naoki Hara, Dong Song, Yoshiko Hishitani, Fuminori Satou, Keiko Kushibiki, Makoto Uchiyama, Mitsugu Yamanaka
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Publication number: 20030082423Abstract: A fuel cell of the present invention includes a fuel cell stack (1) for being formed by stacking a plurality of cell plates (2) having a flat shape, the cell plates (2) being configured by arranging a plurality of cells, the cell having an electrolyte layer (2a), a fuel electrode layer (2b) and an air electrode layer (2c). A combustion heater plate (3) includes a porous combustion plate (3a) and a gas non-pass layer (3b) covering a surface of the porous combustion plate (3a). The combustion heater plate (3) is disposed between the cell plates (2).Type: ApplicationFiled: October 22, 2002Publication date: May 1, 2003Applicant: Nissan Motor Co., Ltd.Inventors: Keiko Kushibiki, Masaharu Hatano, Itaru Shibata, Tatsuhiro Fukuzawa, Naoki Hara, Dong Song, Yoshiko Hishitani, Fuminori Satou, Makoto Uchiyama, Mitsugu Yamanaka
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Publication number: 20030077504Abstract: This unit cell for a fuel cell is formed by laminating a fuel electrode (3), a solid electrolyte (2) and an air electrode (1) on a porous base material (4). The porous base material (4) has a plurality of fine pores (5) through which fuel gas can flow and has a reforming catalysis. The unit cells for the fuel cell are coupled and integrated two-dimensionally to make a stack for the fuel cell, and thus a solid oxide fuel cell having this stack as a power generating element is formed.Type: ApplicationFiled: October 21, 2002Publication date: April 24, 2003Applicant: NISSAN MOTOR CO., LTD.Inventors: Naoki Hara, Keiko Kushibiki, Makoto Uchiyama, Mitsugu Yamanaka, Fuminori Satou, Dong Song, Yoshiko Hishitani, Tatsuhiro Fukuzawa, Masaharu Hatano, Itaru Shibata
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Publication number: 20030044667Abstract: An SOFC is provided with an oxidizing electrode layer, a reducing electrode layer opposite to the oxidizing electrode layer, a solid electrolyte layer between the oxidizing electrode layer and the reducing electrode layer, and an alternating laminated structural section between the oxidizing electrode layer and the solid electrolyte layer or between the reducing electrode layer and the solid electrolyte layer. The alternating laminated structural section has a first thin film layer including a material of corresponding one of the electrode layers and a second thin film layer having a phase including the material of the corresponding one of the electrode layers and that of the solid electrolyte layer. The fist thin film layer and the second thin film layer are alternately laminated. The second thin film layer may have a coefficient of thermal expansion with a value between that of thermal expansion of the corresponding one of the electrode layers or a value equivalent to that of the solid electrolyte layer.Type: ApplicationFiled: August 14, 2002Publication date: March 6, 2003Applicant: Nissan Motor Co., Ltd.Inventors: Naoki Hara, Mitsugu Yamanaka, Fuminori Satou, Masaharu Hatano, Keiko Kushibiki, Tatsuhiro Fukuzawa, Itaru Shibata, Makoto Uchiyama
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Publication number: 20030031910Abstract: A cell plate structure for a solid oxide electrolyte type fuel cell is provided with a lower electrode layer, an upper electrode layer provided in opposition to the lower electrode layer, a solid electrolyte layer provided between the lower electrode layer and the upper electrode layer, and an area provided in at least one of the lower electrode layer and the upper electrode layer. The area has a portion which is formed by removing a substance, contained in the at least one of the lower electrode layer and the upper electrode layer during formation thereof, after the at least one of the lower electrode layer and the upper electrode layer has been formed. Such a fuel cell plate structure can be applied to a solid electrolyte fuel cell representatively by being disposed between a pair of separators that have gas flow passages supplying the lower electrode layer and the upper electrode layer with gasses, respectively.Type: ApplicationFiled: August 12, 2002Publication date: February 13, 2003Applicant: Nissan Motor Co., Ltd.Inventors: Fuminori Satou, Mitsugu Yamanaka, Makoto Uchiyama, Masaharu Hatano, Keiko Kushibiki, Naoki Hara, Tatsuhiro Fukuzawa, Itaru Shibata
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Publication number: 20030012994Abstract: A single cell for a solid oxide fuel cell, in which a solid electrolyte layer is sandwiched by an upper electrode layer and a lower electrode layer. This single cell includes a substrate having openings and an insulating and stress absorbing layer stacked on an upper surface of this substrate. The solid electrolyte layer is formed on an upper surface of the insulating and stress absorbing layer so as to cover the openings, the upper electrode layer is stacked on an upper surface of the solid electrolyte layer, and the lower electrode layer is coated on a lower surface of the solid electrolyte layer via the openings from a lower surface of the substrate. A cell plate, in which these single cells are disposed two-dimensionally on a common substrate. Furthermore, a solid oxide fuel cell, in which these cell plates and plate-shaped separators including gas passages on both surfaces thereof are alternately stacked.Type: ApplicationFiled: July 16, 2002Publication date: January 16, 2003Inventors: Keiko Kushibiki, Fuminori Sato, Naoki Hara, Mitsugu Yamanaka, Masaharu Hatano, Makoto Uchiyama, Itaru Shibata, Tatsuhiro Fukuzawa
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Patent number: 6489053Abstract: A multilayer battery cell comprises an ion-conductive separator film. A positive electrode layer is disposed on one surface of the separator film. A negative electrode layer is disposed on the other surface of the separator film. A first conductive layer is disposed on the positive electrode layer and electrically connected to the same. A second conductive layer is disposed on the negative electrode layer and electrically connected to the same. The positive and negative electrode layers and the first and second conductive layers are each produced by employing a spraying process.Type: GrantFiled: August 3, 2000Date of Patent: December 3, 2002Assignee: Nissan Motor Co., Ltd.Inventors: Hideaki Horie, Takaaki Abe, Mikio Kawai, Yasuhiko Ohsawa, Yuuji Tanjou, Osamu Shimamura, Tatsuhiro Fukuzawa