Patents by Inventor Yukinori Hato
Yukinori Hato 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).
-
Patent number: 8203826Abstract: A lithium ion capacitor includes a positive electrode, a negative electrode, and a non-protonic organic solvent electrolytic solution of a lithium salt. A positive electrode active material is a material capable of reversibly doping a lithium ion and/or an anion. A negative electrode active material is a material capable of reversibly doping a lithium ion. The lithium ion is doped in advance to either one or both of the negative electrode and the positive electrode so that a positive electrode potential after the positive electrode and the negative electrode are short-circuited is 2.0 V (relative to Li/Li+) or less when capacitance per unit weight of the positive electrode is C+(F/g), weight of the positive electrode active material is W+(g), capacitance per unit weight of negative electrode is C?(F/g), and weight of the negative electrode active material is W?(g), a value of (C?×W?)/(C+×W+) is 5 or more.Type: GrantFiled: December 7, 2006Date of Patent: June 19, 2012Assignee: Fuji Jukogyo Kabushiki KaishaInventors: Kohei Matsui, Atsuro Shirakami, Nobuo Ando, Shinichi Tasaki, Risa Miyagawa, Osamu Hatozaki, Yukinori Hato
-
Patent number: 8152865Abstract: An electrical storage device having a positive electrode, a negative electrode, a lithium electrode, and an electrolyte capable of transferring lithium ion, the lithium electrode is out of direct contact with the negative electrode, and lithium ion is supplied to the negative electrode by flowing a current between the lithium and negative electrode through an external circuit. A method of using the electrical storage device includes using the lithium electrode as a reference electrode, the positive electrode potential and negative electrode potential is measured, and the potential of the positive or negative electrode is controlled during charging or discharging. The potentials of the positive electrode and negative electrode are monitored to easily determine whether deterioration of the electrical storage device is caused by the positive or negative electrode.Type: GrantFiled: August 24, 2010Date of Patent: April 10, 2012Assignee: Fuji Jukogyo Kabushiki KaishaInventors: Nobuo Ando, Shinichi Tasaki, Yukinori Hato, Chisato Marumo
-
Patent number: 8142930Abstract: To present a carbon material which provides an electrical storage device not only ensuring a high energy density but also realizing a high output and an excellent low temperature performance. A negative electrode active material for an electrical storage device employing an aprotic organic solvent electrolyte solution containing a lithium salt as an electrolytes characterized in that it is made of a carbon material having a specific surface area of from 0.01 to 50 m2/g and a total mesopore volume of from 0.005 to 1.0 cc/g, wherein volumes of mesopores having pore diameters of from 100 to 400 ? occupy at least 25% of the total mesopore volume.Type: GrantFiled: April 25, 2006Date of Patent: March 27, 2012Assignee: Fuji Jukogyo Kabushiki KaishaInventors: Kenji Kojima, Nobuo Ando, Tsutomu Fujii, Hiromoto Taguchi, Osamu Hatozaki, Yukinori Hato, Chisato Marumo
-
Publication number: 20120045685Abstract: To provide an electric storage device whose negative electrode can be doped with lithium ions in a short time and whose resistance can be lowered. An electric storage device including a unit that is obtained by alternately stacking a positive-electrode sheet 9 and a negative-electrode sheet 10 with a separator 3 interposed therebetween, the positive electrode sheet 9 including a positive-electrode active material layer 1 and a positive-electrode charge collector 4, and the negative electrode sheet 10 including a negative-electrode active material layer 2 and a negative-electrode charge collector 5, in which a foil, an etching foil, or a porous lath foil is used as the positive-electrode charge collector 4 and the negative-electrode charge collector 5, a cut is made in a coating area of the positive-electrode active material layer 1 and the negative-electrode active material layer 2, and a lithium supply source is disposed so as to be opposed to the negative electrode sheet 10 of the unit.Type: ApplicationFiled: April 5, 2011Publication date: February 23, 2012Applicant: NEC Tokin CorporationInventors: Daisuke Seki, Yukinori Hato, Masako Ooya, Katsuhiro Yoshida, Risa Miyagawa, Kouji Maeda
-
Patent number: 8098480Abstract: A lithium ion capacitor includes a positive electrode made of a material capable of reversibly carrying either one or both of a lithium ion and an anion, a negative electrode made of a material capable of reversibly carrying a lithium ion, and an electrolytic solution made of a non-protonic organic solvent electrolytic solution of a lithium salt. A negative electrode active material is non-graphitizable carbon having a ratio of number of hydrogen atoms to number of carbon atoms of zero or more and less than 0.05. The lithium ion is doped in advance to either one or both of the negative electrode and the positive electrode so that a negative electrode potential when a cell is discharged to a voltage one half a charging voltage of the cell is 0.15 V or less relative to a lithium ion potential.Type: GrantFiled: October 17, 2006Date of Patent: January 17, 2012Assignee: Fuji Jukogyo Kabushiki KaishaInventors: Nobuo Ando, Kenji Kojima, Shinichi Tasaki, Hiromoto Taguchi, Kohei Matsui, Atsuro Shirakami, Yukinori Hato
-
Patent number: 8004823Abstract: A lithium ion capacitor includes a positive electrode made of a material capable of reversibly doping and dedoping lithium ions and/or anions; a negative electrode made of a material capable of reversibly doping and dedoping lithium ions; and an electrolytic solution made of an aprotonic organic solvent electrolyte solution of a lithium salt. When the negative electrode and/or positive electrode and a lithium ion supply source are electrochemically brought into contact, lithium ions are doped in a negative electrode and/or positive electrode. A positive electrode potential after the positive electrode and negative electrode are short-circuited is 2.0 V (vs. Li/Li+) or less. The positive electrode and/or negative electrode has a current collector made of a metal foil that has many holes that penetrate through both sides and have an average diameter of inscribed circles of the through-holes of 100 ?m or less.Type: GrantFiled: November 13, 2006Date of Patent: August 23, 2011Assignee: Fuji Jukogyo Kabushiki KaishaInventors: Hiromoto Taguchi, Nobuo Ando, Hideki Shibuya, Shinichi Tasaki, Risa Miyagawa, Yukinori Hato, Osamu Hatozaki
-
Publication number: 20110041324Abstract: An electrical storage device having a positive electrode, a negative electrode, a lithium electrode, and an electrolyte capable of transferring lithium ion, the lithium electrode is out of direct contact with the negative electrode, and lithium ion is supplied to the negative electrode by flowing a current between the lithium and negative electrode through an external circuit. A method of using the electrical storage device includes using the lithium electrode as a reference electrode, the positive electrode potential and negative electrode potential is measured, and the potential of the positive or negative electrode is controlled during charging or discharging. The potentials of the positive electrode and negative electrode are monitored to easily determine whether deterioration of the electrical storage device is caused by the positive or negative electrode.Type: ApplicationFiled: August 24, 2010Publication date: February 24, 2011Applicant: FUJI JUKOGYO KABUSHIKI KAISHAInventors: Nobuo Ando, Shinichi Tasaki, Yukinori Hato, Chisato Marumo
-
Patent number: 7817403Abstract: A lithium ion capacitor having high energy density, high output density, high capacity and high safety includes a positive electrode made of a material capable of being reversibly doped with lithium ions and/or anions, a negative electrode made of a material capable of being reversively doped with lithium ions, and an aprotic organic solution of a lithium salt as an electrolytic solution. Wherein, the positive electrode and the negative electrode are laminated or wound with a separator interposed between them, the area of the positive electrode is smaller than the area of the negative electrode. The face of the positive electrode is substantially covered by the face of the negative electrode when they are laminated or wound.Type: GrantFiled: July 28, 2006Date of Patent: October 19, 2010Assignee: Fuji Jukogyo Kabushiki KaishaInventors: Shinichi Tasaki, Mitsuru Nagai, Hiromoto Taguchi, Kohei Matsui, Risa Takahata, Kenji Kojima, Nobuo Ando, Yukinori Hato, Osamu Hatozaki
-
Patent number: 7768769Abstract: A lithium ion capacitor having a high capacity retention at the time of continuous charge at a high temperature and excellent durability. The lithium ion capacitor includes a positive electrode, a negative electrode and an aprotic organic solvent electrolyte solution of a lithium salt as an electrolytic solution. The positive electrode active material is a material capable of reversibly supporting lithium ions and/or anions, a negative electrode active material is a material capable of reversibly supporting lithium ions, the negative electrode and/or the positive electrode is doped with lithium ions so that the potential of the positive electrode is at most 2.0 V after the positive electrode and the negative electrode are short-circuited, and the electrolytic solution contains vinylene carbonate or its derivative.Type: GrantFiled: October 28, 2005Date of Patent: August 3, 2010Assignee: Fuji Jukogyo Kabushiki KaishaInventors: Kohei Matsui, Risa Takahata, Nobuo Ando, Atsuro Shirakami, Shinichi Tasaki, Yukinori Hato
-
Patent number: 7733629Abstract: A lithium ion capacitor including a positive electrode, a negative electrode, and an aprotic organic solvent solution of a lithium salt as an electrolytic solution. The positive electrode active material is capable of reversibly supporting lithium ions and/or anions, the negative electrode active material is capable of reversibly supporting lithium ions and anions, and the potentials of the positive electrode and the negative electrode are at most 2.0 V after the positive electrode and the negative electrode are short-circuited. The positive electrode and the negative electrode are alternately laminated with a separator interposed therebetween to constitute an electrode unit, the cell is constituted by at least two such electrode units, lithium metal is disposed between the electrode units, and lithium ions are preliminarily supported by the negative electrode and/or the positive electrode by electrochemical contact of the lithium metal with the negative electrode and/or the positive electrode.Type: GrantFiled: October 19, 2005Date of Patent: June 8, 2010Assignee: Fuji Jukogyo Kabushiki KaishaInventors: Shinichi Tasaki, Nobuo Ando, Mitsuru Nagai, Atsuro Shirakami, Kohei Matsui, Yukinori Hato
-
Publication number: 20100128415Abstract: A lithium ion capacitor includes a positive electrode made of a material capable of reversibly carrying either one or both of a lithium ion and an anion, a negative electrode made of a material capable of reversibly carrying a lithium ion, and an electrolytic solution made of a non-protonic organic solvent electrolytic solution of a lithium salt. A negative electrode active material is non-graphitizable carbon having a ratio of number of hydrogen atoms to number of carbon atoms of zero or more and less than 0.05. The lithium ion is doped in advance to either one or both of the negative electrode and the positive electrode so that a negative electrode potential when a cell is discharged to a voltage one half a charging voltage of the cell is 0.15 V or less relative to a lithium ion potential.Type: ApplicationFiled: October 17, 2006Publication date: May 27, 2010Applicant: FUJI JUKOGYO KABUSHIKI KAISHAInventors: Nobuo Ando, Kenji Kojima, Shinichi Tasaki, Hiromoto Taguchi, Kohei Matsui, Atsuro Shirakami, Yukinori Hato
-
Patent number: 7697264Abstract: It is to provide a lithium ion capacitor having a high energy density, a high output density, a large capacity and high safety. A lithium ion capacitor comprising a positive electrode, a negative electrode and an aprotic organic solvent solution of a lithium salt as an electrolytic solution, wherein a positive electrode active material is a material capable of reversibly supporting lithium ions and anions, a negative electrode active material is a material capable of reversibly supporting lithium ions, and the potentials of the positive electrode and the negative electrode are at most 2.Type: GrantFiled: October 19, 2005Date of Patent: April 13, 2010Assignee: Fuji Jukogyo Kabushiki KaishaInventors: Shinichi Tasaki, Nobuo Ando, Mitsuru Nagai, Atsuro Shirakami, Kohei Matsui, Yukinori Hato
-
Publication number: 20100027195Abstract: A lithium ion capacitor includes a positive electrode made of a material capable of reversibly doping and dedoping lithium ions and/or anions; a negative electrode made of a material capable of reversibly doping and dedoping lithium ions; and an electrolytic solution made of an aprotonic organic solvent electrolyte solution of a lithium salt. When the negative electrode and/or positive electrode and a lithium ion supply source are electrochemically brought into contact, lithium ions are doped in a negative electrode and/or positive electrode. A positive electrode potential after the positive electrode and negative electrode are short-circuited is 2.0 V (vs. Li/Li+) or less. The positive electrode and/or negative electrode has a current collector made of a metal foil that has many holes that penetrate through both sides and have an average diameter of inscribed circles of the through-holes of 100 ?m or less.Type: ApplicationFiled: November 13, 2006Publication date: February 4, 2010Applicant: FUJI JUKOGYO KABUSHIKI KAISHAInventors: Hiromoto Taguchi, Nobuo Ando, Hideki Shibuya, Shinichi Tasaki, Risa Miyagawa, Yukinori Hato, Osamu Hatozaki
-
Publication number: 20090174986Abstract: It is to provide a lithium ion capacitor having a high capacity retention at the time of continuous charge at a high temperature and excellent in durability. A lithium ion capacitor comprising a positive electrode, a negative electrode and an aprotic organic solvent electrolyte solution of a lithium salt as an electrolytic solution, characterized in that a positive electrode active material is a material capable of reversibly supporting lithium ions and/or anions, a negative electrode active material is a material capable of reversibly supporting lithium ions, the negative electrode and/or the positive electrode is doped with lithium ions so that the potential of the positive electrode is at most 2.0 V after the positive electrode and the negative electrode are short-circuited, and the electrolytic solution contains vinylene carbonate or its derivative.Type: ApplicationFiled: October 28, 2005Publication date: July 9, 2009Applicant: FUJI JUKOGYO KABUSHIKI KAISHAInventors: Kohei Matsui, Risa Takahata, Nobuo Ando, Atsuro Shirakami, Shinichi Tasaki, Yukinori Hato
-
Publication number: 20090161296Abstract: A lithium ion capacitor includes a positive electrode, a negative electrode, and a non-protonic organic solvent electrolytic solution of a lithium salt. A positive electrode active material is a material capable of reversibly doping a lithium ion and/or an anion. A negative electrode active material is a material capable of reversibly doping a lithium ion. The lithium ion is doped in advance to either one or both of the negative electrode and the positive electrode so that a positive electrode potential after the positive electrode and the negative electrode are short-circuited is 2.0 V (relative to Li/Li+) or less when capacitance per unit weight of the positive electrode is C+(F/g), weight of the positive electrode active material is W+(g), capacitance per unit weight of negative electrode is C?(F/g), and weight of the negative electrode active material is W?(g), a value of (C?×W?)/(C+×W+) is 5 or more.Type: ApplicationFiled: December 7, 2006Publication date: June 25, 2009Applicant: FUJI JUKOGYO KABUSHIKI KAISHAInventors: Kohei Matsui, Atsuro Shirakami, Nobuo Ando, Shinichi Tasaki, Risa Miyagawa, Osamu Hatozaki, Yukinori Hato
-
Publication number: 20090154064Abstract: A lithium ion capacitor including a positive electrode, a negative electrode, and an aprotic organic solvent solution of a lithium salt as an electrolytic solution. The positive electrode active material is capable of reversibly supporting lithium ions and/or anions, the negative electrode active material is capable of reversibly supporting lithium ions and anions, and the potentials of the positive electrode and the negative electrode are at most 2.0 V after the positive electrode and the negative electrode are short-circuited. The positive electrode and the negative electrode are alternately laminated with a separator interposed therebetween to constitute an electrode unit, the cell is constituted by at least two such electrode units, lithium metal is disposed between the electrode units, and lithium ions are preliminarily supported by the negative electrode and/or the positive electrode by electrochemical contact of the lithium metal with the negative electrode and/or the positive electrode.Type: ApplicationFiled: October 19, 2005Publication date: June 18, 2009Inventors: Shinichi Tasaki, Nobuo Ando, Mitsuru Nagai, Atsuro Shirakami, Kohei Matsui, Yukinori Hato
-
Patent number: 7548409Abstract: An organic electrolyte capacitor is provided with a high energy density, a high power and a high capacitance even at ?20°. The organic electrolyte capacitor has a high discharge capacity even at a temperature as low as ?20° C., while having a high voltage and a high energy density. The structure of the organic electrolyte capacitor includes a positive electrode, a negative electrode, and an electrolyte capable of transporting lithium ions. The positive electrode can reversibly support lithium ions and anions, and the negative electrode can reversibly support the lithium ions by using a mesopored carbon material having a pore volume of 0.10 ml/g or more for a pore diameter of 3 nm or larger.Type: GrantFiled: March 31, 2005Date of Patent: June 16, 2009Assignee: Fuji Jukogyo Kabushiki KaishaInventors: Kenji Kojima, Satoshi Nagura, Nobuo Ando, Yukinori Hato, Chisato Marumo
-
Publication number: 20090097189Abstract: A lithium ion capacitor having high energy density, high output density, high capacity and high safety is provided. A lithium ion capacitor comprising a positive electrode 1 made of a material capable of being reversibly doped with lithium ions and/or anions, a negative electrode 2 made of a material capable of being reversively doped with lithium ions, and an aprotic organic solution of a lithium salt as an electrolytic solution, wherein the positive electrode 1 and the negative electrode 2 are laminated or wound with a separator interposed between them, the area of the positive electrode 1 is smaller than the area of the negative electrode 2, and the face of the positive electrode 1 is substantially covered by the face of the negative electrode 2 when they are laminated or wound.Type: ApplicationFiled: July 28, 2006Publication date: April 16, 2009Applicant: Fuji Jukogyo Kabushiki KaishaInventors: Shinichi Tasaki, Mitsuru Nagai, Hiromoto Taguchi, Kohei Matsui, Risa Takahata, Kenji Kojima, Nobuo Ando, Yukinori Hato, Osamu Hatozaki
-
Publication number: 20090027831Abstract: It is to provide a lithium ion capacitor having a high energy density, a high output density, a large capacity and high safety. A lithium ion capacitor comprising a positive electrode, a negative electrode and an aprotic organic solvent solution of a lithium salt as an electrolytic solution, wherein a positive electrode active material is a material capable of reversibly supporting lithium ions and anions, a negative electrode active material is a material capable of reversibly supporting lithium ions, and the potentials of the positive electrode and the negative electrode are at most 2.Type: ApplicationFiled: October 19, 2005Publication date: January 29, 2009Applicant: Fuji Jukogyo Kabushiki KaishaInventors: Shinichi Tasaki, Nobuo Ando, Mitsuru Nagai, Atsuro Shirakami, Kohei Matsui, Yukinori Hato
-
Publication number: 20090023066Abstract: To present a carbon material which provides an electrical storage device not only ensuring a high energy density but also realizing a high output and an excellent low temperature performance. A negative electrode active material for an electrical storage device employing an aprotic organic solvent electrolyte solution containing a lithium salt as an electrolytes characterized in that it is made of a carbon material having a specific surface area of from 0.01 to 50 m2/g and a total mesopore volume of from 0.005 to 1.0 cc/g, wherein volumes of mesopores having pore diameters of from 100 to 400 ? occupy at least 25% of the total mesopore volume.Type: ApplicationFiled: April 25, 2006Publication date: January 22, 2009Applicant: FUJI JUKOGYO KABUSHIKI KAISHAInventors: Kenji Kojima, Nobuo Ando, Tsutomu Fujii, Hiromoto Taguchi, Osamu Hatozaki, Yukinori Hato, Chisato Marumo