Patents by Inventor Chisato Marumo

Chisato Marumo 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: 9496584
    Abstract: A wound-type accumulator is equipped with a cylindrical wound electrode unit, which has belt-like positive electrode and negative electrode and configured by winding an electrode stack obtained by stacking the positive electrode and negative electrode through a separator from one end thereof, and an electrolytic solution. The negative electrode and/or the positive electrode is doped with lithium ions by electrochemical contact of the negative electrode and/or the positive electrode with a lithium ion source, intra-positive electrode spaces are formed in the positive electrode, and at least one lithium ion source is provided in the intra-positive electrode space or at a position opposing to the intra-positive electrode space in the negative electrode in a state coming into no contact with the positive electrode.
    Type: Grant
    Filed: December 14, 2009
    Date of Patent: November 15, 2016
    Assignee: JM Energy Corporation
    Inventors: Makoto Taguchi, Yuu Watanabe, Nobuo Ando, Naoshi Yasuda, Chisato Marumo
  • Patent number: 8152865
    Abstract: 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: Grant
    Filed: August 24, 2010
    Date of Patent: April 10, 2012
    Assignee: Fuji Jukogyo Kabushiki Kaisha
    Inventors: Nobuo Ando, Shinichi Tasaki, Yukinori Hato, Chisato Marumo
  • Patent number: 8142930
    Abstract: 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: Grant
    Filed: April 25, 2006
    Date of Patent: March 27, 2012
    Assignee: Fuji Jukogyo Kabushiki Kaisha
    Inventors: Kenji Kojima, Nobuo Ando, Tsutomu Fujii, Hiromoto Taguchi, Osamu Hatozaki, Yukinori Hato, Chisato Marumo
  • Patent number: 8125767
    Abstract: A coated electrode includes a current collector of an etched aluminum foil having a thickness of 20 to 45 ?m, an apparent density of 2.00 to 2.54 g/cm3, an air permeability of 20 to 120 s and a number of through-holes penetrating therethrough from the front surface to the back surface, and an electrode layer formed by applying a coating material including, as an active material, a substance capable of reversibly carrying lithium ions and anions on to the current collector. The coated electrode is industrially producible, high in conductivity and strength, and excellent in evenness. A capacitor, for example, can make use of the electrode.
    Type: Grant
    Filed: December 26, 2007
    Date of Patent: February 28, 2012
    Assignee: JM Energy Corporation
    Inventors: Chisato Marumo, Kenichi Matsumoto, Yuka Toyomasu, Makoto Ohshima
  • Publication number: 20110256438
    Abstract: The invention has as its object the provision of a wound-type accumulator, by which arrangement of a lithium ion source is simplified, and the time required to inject an aprotic organic solvent electrolyte solution and the time required for predoping are shortened, and thus the assembly can be completed in a short period of time to achieve high productivity.
    Type: Application
    Filed: December 14, 2009
    Publication date: October 20, 2011
    Applicant: JM ENERGY CORPORATION
    Inventors: Makoto Taguchi, Yuu Watanabe, Nobuo Ando, Naoshi Yasuda, Chisato Marumo
  • Publication number: 20110041324
    Abstract: 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: Application
    Filed: August 24, 2010
    Publication date: February 24, 2011
    Applicant: FUJI JUKOGYO KABUSHIKI KAISHA
    Inventors: Nobuo Ando, Shinichi Tasaki, Yukinori Hato, Chisato Marumo
  • Publication number: 20100027193
    Abstract: A coated electrode includes a current collector of an etched aluminum foil having a thickness of 20 to 45 ?m, an apparent density of 2.00 to 2.54 g/cm3, an air permeability of 20 to 120 s and a number of through-holes penetrating therethrough from the front surface to the back surface, and an electrode layer formed by applying a coating material including, as an active material, a substance capable of reversibly carrying lithium ions and anions on to the current collector. The coated electrode is industrially producible, high in conductivity and strength, and excellent in evenness. A capacitor, for example, can make use of the electrode.
    Type: Application
    Filed: December 26, 2007
    Publication date: February 4, 2010
    Applicant: JM ENERGY CORPORATION
    Inventors: Chisato Marumo, Kenichi Matsumoto, Yuka Toyomasu, Makoto Ohshima
  • Patent number: 7548409
    Abstract: 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: Grant
    Filed: March 31, 2005
    Date of Patent: June 16, 2009
    Assignee: Fuji Jukogyo Kabushiki Kaisha
    Inventors: Kenji Kojima, Satoshi Nagura, Nobuo Ando, Yukinori Hato, Chisato Marumo
  • Publication number: 20090023066
    Abstract: 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: Application
    Filed: April 25, 2006
    Publication date: January 22, 2009
    Applicant: FUJI JUKOGYO KABUSHIKI KAISHA
    Inventors: Kenji Kojima, Nobuo Ando, Tsutomu Fujii, Hiromoto Taguchi, Osamu Hatozaki, Yukinori Hato, Chisato Marumo
  • Patent number: 7443651
    Abstract: An organic electrolyte capacitor. The organic capacitor is made up of a positive electrode, a negative electrode, and an electrolyte capable of transporting lithium ions. The organic capacitor exhibits a small change in internal resistance during charge and discharge, a high energy and a high output power, and allows lithium ions to move with ease. This is achieved by having a positive electrode that is able to support lithium ions and anions reversibly, a negative electrode that is able to support lithium ions reversibly, and controlling the ratio of positive electrode active material to negative electrode active material within an optimized range.
    Type: Grant
    Filed: September 27, 2004
    Date of Patent: October 28, 2008
    Assignee: Fuji Jukogyo Kabushiki Kaisha
    Inventors: Nobuo Ando, Kenji Kojima, Shinichi Tasaki, Hiromoto Taguchi, Tsutomu Fujii, Yukinori Hato, Chisato Marumo
  • Publication number: 20080165471
    Abstract: An organic electrolyte capacitor having a high energy density and a high power and having a high capacitance even at ?20° C. is provided. According to the organic electrolyte capacitor of the present invention, an organic electrolyte capacitor having a high discharge capacity even at a low temperature state as low as ?20° C. while having a high voltage and a high energy density can be attained in an organic electrolyte capacitor having a positive electrode, a negative electrode, and an electrolyte capable of transporting lithium ions, in which 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 pore diameter of 3 nm or larger.
    Type: Application
    Filed: March 31, 2005
    Publication date: July 10, 2008
    Applicant: Fuji Jukogyo Kabushiki Kaisha
    Inventors: Kenji Kojima, Satoshi Nagura, Nobuo Ando, Yukinori Hato, Chisato Marumo
  • Patent number: 7385801
    Abstract: There is provided an organic electrolyte capacitor having electrodes on current collectors that have holes penetrating the front and rear surfaces, in which electrode materials formed on the through-holes of the current collectors seldom fall off and high energy density and high power density can be obtained. The organic electrolyte capacitor includes positive electrodes, negative electrodes and an electrolyte capable of transferring lithium ions, in which the positive electrodes contain a substance capable of carrying lithium ions and/or anions reversibly as a positive electrode active material, the negative electrodes contain a substance capable of carrying lithium ions as a negative electrode active material, the positive and negative electrodes possess the positive or negative electrode active material layers on an electrode substrate that has conductive layers made of conductive materials on current collectors, which have through-holes, and the negative electrodes carry lithium electrochemically.
    Type: Grant
    Filed: March 29, 2004
    Date of Patent: June 10, 2008
    Assignee: Fuji Jukogyo Kabushiki Kaisha
    Inventors: Nobuo Ando, Kenji Kojima, Shinichi Tasaki, Hiromoto Taguchi, Tsutomu Fuji, Yukinori Hato, Chisato Marumo
  • Publication number: 20070002524
    Abstract: Discharge at a high current density has been difficult because of problems that an electrolytic solution has low conductivity and absorption and desorption reaction of lithium ions are slow in the negative electrode. However, let a (mAh) be a cell capacity when the organic electrolyte capacitor in a charged state is discharged to half the charging voltage over 1±0.25 hours, and b (mAh) be a negative electrode capacity when the negative electrode in the charged state is discharged to 1.5 V (Li/Li+), then, by controlling a ratio of a positive electrode active material and a negative electrode active material to satisfy 0.05?a/b?0.30, it is possible to achieve a high-performance organic electrolyte capacitor having a small internal resistance and a small change in internal resistance during charging and discharging as well a high output density, in which lithium ions are allowed to move with ease.
    Type: Application
    Filed: September 27, 2004
    Publication date: January 4, 2007
    Applicant: Fuji Jukogyo Kabushiki Kaisha
    Inventors: Nobuo Ando, Kenji Kojima, Shinichi Tasaki, Hiromoto Taguchi, Tsutomu Fujii, Yukinori Hato, Chisato Marumo
  • Publication number: 20070002523
    Abstract: There is provided an organic electrolyte capacitor having electrodes on current collectors that have holes penetrating the front and rear surfaces, in which electrode materials formed an the through-holes of the current collectors seldom fall off and high energy density and high power density can be obtained. The organic electrolyte capacitor includes positive electrodes, negative electrodes and an electrolyte capable of transferring lithium ions, in which the positive electrodes contain a substance capable of carrying lithium ions and/or anions reversibly as a positive electrode active material, the negative electrodes contain a substance capable of carrying lithium ions as a negative electrode active material, the positive and negative electrodes possess the positive or negative electrode active material layers on an electrode substrate that has conductive layers made of conductive materials on current collectors, which have through-holes, and the negative electrodes carry lithium electrochemically.
    Type: Application
    Filed: March 29, 2004
    Publication date: January 4, 2007
    Inventors: Nobuo Ando, Kenji Kojima, Shinichi Tasaki, Hiromoto Taguchi, Tsutomu Fujii, Yukinori Hato, Chisato Marumo
  • Publication number: 20060057433
    Abstract: An electrical storage device of the present invention is characterized in that a positive electrode, a negative electrode, a lithium electrode, and an electrolyte capable of transferring lithium ion is included, the lithium electrode is arranged to be out of direct contact with the negative electrode, and lithium ion can be supplied to the negative electrode by flowing a current between the lithium electrode and the negative electrode through an external circuit. With the above characteristic, problems such as non-uniform carrying of lithium ion to the negative electrode, shape-change of a cell, and temperature increase of an electrolytic solution under incomplete sealing of a cell and the like can be easily solved.
    Type: Application
    Filed: December 25, 2003
    Publication date: March 16, 2006
    Applicant: Fuji Jukogyo Kabushiki Kaisha
    Inventors: Nobuo Ando, Shinichi Tasaki, Yukinori Hato, Chisato Marumo
  • Patent number: 6940706
    Abstract: It is acknowledged that an electric double layer capacitor is markedly superior in power density and cycle characteristics to a secondary battery. However, a higher energy density is required to apply it to a power supply of hybrid vehicle, electric vehicle or the like. The present inventors have found that a carbonaceous material containing copper or a compound of copper exhibits excellent characteristics as an electrode material for capacitor and can realize a capacitor having a large capacity. In the electrode material and the capacitor, copper or a compound of copper exists in the amount of 0.8 to 30 parts by weight calculated on the metal basis based on 100 parts by weight of the carbonaceous material, particularly preferably.
    Type: Grant
    Filed: December 1, 2000
    Date of Patent: September 6, 2005
    Assignee: Kanebo Ltd.
    Inventors: Yusaku Sakata, Akinori Muto, Norimasa Yamada, Azhar Uddin, Masaru Takei, Kenji Kojima, Satoshi Ibaraki, Chisato Marumo
  • Publication number: 20040004208
    Abstract: It is acknowledged that an electric double layer capacitor is markedly superior in power density and cycle characteristics to a secondary battery. However, a higher energy density is required to apply it to a power supply of hybrid vehicle, electric vehicle or the like. The present inventors have found that a carbonaceous material containing copper or a compound of copper exhibits excellent characteristics as an electrode material for capacitor and can realize a capacitor having a large capacity. In the electrode material and the capacitor, copper or a compound of copper exists in the amount of 0.8 to 30 parts by weight calculated on the metal basis based on 100 parts by weight of the carbonaceous material, particularly preferably.
    Type: Application
    Filed: February 24, 2003
    Publication date: January 8, 2004
    Inventors: Yusaku Sakata, Akinori Muto, Norimasa Yamada, Azhar Uddin, Masaru Takei, Kenji Kojima, Satoshi Ibaraki, Chisato Marumo
  • Patent number: 6631073
    Abstract: Disclosed are electrode materials that exhibit very sharp pore size distribution within the range of mesopores and include pores having a pore diameter within a range of X±&agr; nm (3.0≦X<10, &agr;=1.0; range of pore size distribution) of which volume accounts for 15% or more of the total volume of mesopores having a pore diameter within a range from 2.0 to 50 nm, and are suited for use in electric double layer capacitor, battery or the like of large capacitance and discharge of large current. These electrode materials are obtained by adding at least one transition metal or at least one transition metal compound to a carbon material or a carbon material precursor, and subjecting to a heat treatment at a temperature of 600° C. or higher.
    Type: Grant
    Filed: April 23, 2001
    Date of Patent: October 7, 2003
    Assignee: Kanebo, Limited
    Inventors: Yusaku Sakata, Akinori Muto, Satoshi Ibaraki, Kenji Kojima, Chisato Marumo, Niro Shiomi
  • Patent number: 5059578
    Abstract: A molecular sieving carbon characterized by (A) having a structure in which a number of spherical carbonaceous particles having a particle diameter of 0.8 to 120 micrometers overlap and coalesce three-dimensionally at random, (B) in which continuous pathways running three-dimensionally at random exist between a number of the carbonaceous particles, (C) in which a number of the carbonaceous particles have each a number of micropores communicating with the pathways existing between the particles, and (D) having a carbon content of at least 85% by weight. The molecular sieving carbon is useful for obtaining, for example, a nitrogen gas, oxygen gas or gaseous mixture enriched with either the nitrogen gas or the oxygen gas from a gaseous mixture containing the nitrogen gas and oxygen gas.
    Type: Grant
    Filed: March 9, 1990
    Date of Patent: October 22, 1991
    Assignee: Kanebo, Ltd.
    Inventors: Chisato Marumo, Eiji Hayata, Niro Shiomi
  • Patent number: 4933314
    Abstract: A molecular sieving carbon characterized by (A) having a structure in which a number of spherical carbonaceous particles having a particle diameter of 0.8 to 120 micrometers overlap and coalesce three-dimensionally at random, (B) in which continuous pathways running three-dimensionally at random exist between a number of the carbonaceous particles, (C) in which a number of the carbonaceous particles have each a number of micropores communicating with the pathways existing between the particles, and (D) having a carbon content of at least 85% by weight. The molecular sieving carbon is useful for obtaining, for example, a nitrogen gas, oxygen gas or gaseous mixture enriched with either the nitrogen gas or the oxygen gas from a gaseous mixture containing the nitrogen gas and oxygen gas.
    Type: Grant
    Filed: March 8, 1988
    Date of Patent: June 12, 1990
    Assignee: Kanebo Ltd.
    Inventors: Chisato Marumo, Eiji Hayata, Niro Shiomi