Patents by Inventor Takuji Yoshimoto

Takuji Yoshimoto 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).

  • Publication number: 20190062572
    Abstract: A charge transport varnish containing a charge transport substance, an electron-accepting dopant substance, and an organic solvent, wherein the electron-accepting dopant substance contains one or more types selected from naphthalene disulfonic acid, naphthalene trisulfonic acid, and naphthalene tetrasulfonic acid. This charge transport varnish is suitable for forming a hole collection layer that can be used to produce an organic photoelectric conversion element which exhibits high photoelectric conversion efficiency.
    Type: Application
    Filed: January 25, 2017
    Publication date: February 28, 2019
    Applicant: NISSAN CHEMICAL CORPORATION
    Inventors: Juro OSHIMA, Takuji YOSHIMOTO
  • Publication number: 20190044132
    Abstract: Provided is an electrode for energy storage devices, which is provided with a collector substrate, an undercoat layer that is formed on at least one surface of the collector substrate and contains carbon nanotubes, and an active material layer that is formed on the surface of the undercoat layer, and wherein the active material layer does not contain a conductive assistant.
    Type: Application
    Filed: December 21, 2016
    Publication date: February 7, 2019
    Applicant: NISSAN CHEMICAL INDUSTRIES, LTD.
    Inventors: Yuki SHIBANO, Tatsuya HATANAKA, Takuji YOSHIMOTO
  • Patent number: 10193160
    Abstract: A hyper-branched polymer dispersant represented by, for example, formula (I) has high adhesion properties to a current collector substrate and therefore enables the formation of an electrically conductive bonding layer having high carbon nanotube concentration. When a composite current collector for an energy storage device electrode which is equipped with the electrically conductive bonding layer is used, it becomes possible to produce an energy storage device from which an electrical current can be extracted without causing the decrease in a voltage particularly in use applications that require a large electrical current instantaneously, such as electrical automotive applications, and which has a long cycle life.
    Type: Grant
    Filed: September 6, 2013
    Date of Patent: January 29, 2019
    Assignee: NISSAN CHEMICAL INDUSTRIES, LTD.
    Inventors: Yuki Shibano, Shigeru Mitsui, Takuji Yoshimoto
  • Publication number: 20190020038
    Abstract: Provided is an electrode for energy storage devices, which is provided with: a collector substrate; an undercoat layer that is formed on at least one surface of the collector substrate and contains carbon nanotubes; and an active material layer that is formed on the surface of the undercoat layer and contains an active material which contains a titanium-containing oxide.
    Type: Application
    Filed: December 21, 2016
    Publication date: January 17, 2019
    Applicant: NISSAN CHEMICAL INDUSTRIES, LTD.
    Inventors: Yuki SHIBANO, Tatsuya HATANAKA, Takuji YOSHIMOTO
  • Patent number: 10164258
    Abstract: A fused-ring quinone-substituted polynorbornene has recurring units of formula (1) and/or (2) below. In formulas (1) and (2), A1 is independently a substituent of formula (3) or (4) below, n is an integer from 1 to 6, and A2 is a substituent of formula (5) or (6) below. In formulas (3) to (6), each X is independently a single bond or a divalent group, and Ar1 and Ar2 are each independently an aromatic hydrocarbon ring or an oxygen atom or sulfur atom-containing aromatic heterocycle that forms together with two carbon atoms on a benzoquinone skeleton. This polymer has charge-storing properties and, when used as an electrode active material, is capable of providing a high-performance battery possessing high capacity, high rate characteristics and high cycle characteristics.
    Type: Grant
    Filed: March 9, 2016
    Date of Patent: December 25, 2018
    Assignees: WASEDA UNIVERSITY, NISSAN CHEMICAL INDUSTRIES, LTD.
    Inventors: Hiroyuki Nishide, Kenichi Oyaizu, Takuma Kawai, Satoshi Nakao, Takuji Yoshimoto
  • Publication number: 20180337420
    Abstract: A nonaqueous secondary cell provided with: a positive electrode provided with a positive-electrode current-collecting substrate and a positive-electrode active material layer formed thereon, the positive-electrode active material layer being able to absorb or discharge lithium; a negative electrode provided with a negative-electrode current-collecting substrate and a negative-electrode active material layer formed thereon, the negative-electrode active material layer being able to absorb or discharge lithium; a separator interposed between the positive and negative electrodes; and a nonaqueous electrolyte solution. The nonaqueous electrolyte solution contains a sulfonyl imide electrolyte and a nonaqueous organic solvent. An electroconductive protective layer obtained by dispersing an electroconductive carbon material in a binder resin is formed on one or both surfaces of the positive-electrode current-collecting substrate and/or the negative-electrode current-collecting substrate.
    Type: Application
    Filed: November 25, 2016
    Publication date: November 22, 2018
    Applicant: NISSAN CHEMICAL INDUSTRIES, LTD.
    Inventors: Tatsuya HATANAKA, Yuki SHIBANO, Takuji YOSHIMOTO
  • Publication number: 20180315927
    Abstract: Provided is a composition for a hole trapping layer of an organic photoelectric conversion element, such composition: containing a solvent and a charge-transporting substance comprising a polyaniline derivative represented by formula (1); and providing a thin film that is suitable as a hole trapping layer of an organic photoelectric conversion element and can also be used to produce an inverse lamination type organic photoelectric conversion element.
    Type: Application
    Filed: October 21, 2016
    Publication date: November 1, 2018
    Applicant: NISSAN CHEMICAL INDUSTRIES, LTD.
    Inventors: Takuji YOSHIMOTO, Juro OSHIMA, Shun SUGAWARA
  • Publication number: 20180269488
    Abstract: This undercoat foil for an energy storage device electrode comprises a collector base plate, and an undercoat layer formed on at least one surface of the collector base plate, the undercoat layer containing carbon nanotubes, and the coating amount per collector base plate surface being 0.1 g/m2 or less. Since this undercoat foil can be effectively welded by ultrasound, the use thereof allows a low-resistance energy storage device and a simple and effective production method therefor to be provided.
    Type: Application
    Filed: May 26, 2016
    Publication date: September 20, 2018
    Applicant: NISSAN CHEMICAL INDUSTRIES, LTD.
    Inventors: Yuki SHIBANO, Tatsuya HATANAKA, Takuji YOSHIMOTO
  • Patent number: 10020449
    Abstract: Provided is a composition comprising: a charge-transporting substance that comprises N,N?-diphenylbenzidine; an electron-accepting dopant substance; and an organic solvent. This composition is suitable, for example, as a composition for the anode buffer layer of an organic thin film solar cell, said composition being used to produce a thin film that is suitable for use as an anode buffer layer that makes it possible to achieve an organic thin film solar cell having a high photoelectric conversion efficiency.
    Type: Grant
    Filed: December 5, 2014
    Date of Patent: July 10, 2018
    Assignee: NISSAN CHEMICAL INDUSTRIES, LTD.
    Inventors: Juro Oshima, Takuji Yoshimoto
  • Publication number: 20180114915
    Abstract: A photosensor element that is capable of achieving a good balance between high photoelectric conversion efficiency and low dark current is able to be obtained by using a composition for forming a hole collecting layer of a photosensor element, which contains an organic solvent and a charge-transporting material that is composed, for example, of an aniline derivative or thiophene derivative represented by one of formulae (AA)-(DD) and having a molecular weight of 200-2,000.
    Type: Application
    Filed: March 16, 2016
    Publication date: April 26, 2018
    Applicant: NISSAN CHEMICAL INDUSTRIES, LTD.
    Inventors: Juro OSHIMA, Takuji YOSHIMOTO
  • Patent number: 9871253
    Abstract: A ion-conductive fused-ring quinone polymer includes recurring units of formula (1) and/or (2) below wherein each X is independently a single bond or a divalent group, and A1 and A2 are each independently an aromatic hydrocarbon ring or an oxygen atom or sulfur atom-containing aromatic heterocycle that forms together with two carbon atoms on a benzoquinone skeleton. This polymer is a material having charge-storing properties which, when used as an electrode active material, is capable of providing a high-performance battery possessing high capacity, high rate characteristics and high cycle characteristics.
    Type: Grant
    Filed: March 9, 2016
    Date of Patent: January 16, 2018
    Assignees: WASEDA UNIVERSITY, NISSAN CHEMICAL INDUSTRIES, LTD.
    Inventors: Hiroyuki Nishide, Kenichi Oyaizu, Takuma Kawai, Takuji Yoshimoto
  • Patent number: 9667187
    Abstract: A motor control apparatus includes a secondary-magnetic-flux-command calculating unit including a minimum-current-secondary-magnetic-flux-command calculating unit that calculates a secondary magnetic flux command for minimizing a current root-mean-square value due to a torque current and an excitation current and a PWM-signal generating unit that generates a torque current command for outputting a desired torque command and an excitation current command for outputting the secondary magnetic flux command, performs vector control such that a q-axis current, which is a detection value of the torque current, and a d-axis current, which is a detection value of the excitation current, respectively coincide with the torque current command and the excitation current command, and generates control signals for turning on and off a switching element in an inverter.
    Type: Grant
    Filed: January 30, 2013
    Date of Patent: May 30, 2017
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Takuji Yoshimoto, Yoshinori Yamashita
  • Publication number: 20170104214
    Abstract: A fused-ring quinone-substituted polynorbornene has recurring units of formula (1) and/or (2) below. In formulas (1) and (2), A1 is independently a substituent of formula (3) or (4) below, n is an integer from 1 to 6, and A2 is a substituent of formula (5) or (6) below. In formulas (3) to (6), each X is independently a single bond or a divalent group, and Ar1 and Ar2 are each independently an aromatic hydrocarbon ring or an oxygen atom or sulfur atom-containing aromatic heterocycle that forms together with two carbon atoms on a benzoquinone skeleton. This polymer has charge-storing properties and, when used as an electrode active material, is capable of providing a high-performance battery possessing high capacity, high rate characteristics and high cycle characteristics.
    Type: Application
    Filed: March 9, 2016
    Publication date: April 13, 2017
    Applicants: WASEDA UNIVERSITY, NISSAN CHEMICAL INDUSTRIES, LTD.
    Inventors: Hiroyuki NISHIDE, Kenichi OYAIZU, Takuma KAWAI, Satoshi NAKAO, Takuji YOSHIMOTO
  • Publication number: 20170077518
    Abstract: Materials having charge-storing properties and made variously of dipyridine-fused benzoquinones of formula (1) below or derivatives thereof, dipyridine-fused benzoquinones of formula (4) below or derivatives thereof, or dipyridine-fused benzoquinone skeleton-containing polymers are provided. In the formulas, Ar1 and Ar2 are each independently a pyridine ring that forms together with two carbon atoms on a benzoquinone skeleton, or a derivative thereof. When used as electrode active materials, these charge storage materials are capable of providing high-performance batteries possessing a high capacity, high rate characteristics and high cycle characteristics.
    Type: Application
    Filed: March 9, 2016
    Publication date: March 16, 2017
    Applicants: WASEDA UNIVERSITY, NISSAN CHEMICAL INDUSTRIES, LTD.
    Inventors: Hiroyuki NISHIDE, Kenichi OYAIZU, Yuya KAMBE, Takuji YOSHIMOTO
  • Publication number: 20170077517
    Abstract: A ion-conductive fused-ring quinone polymer includes recurring units of formula (1) and/or (2) below wherein each X is independently a single bond or a divalent group, and A1 and A2 are each independently an aromatic hydrocarbon ring or an oxygen atom or sulfur atom-containing aromatic heterocycle that forms together with two carbon atoms on a benzoquinone skeleton. This polymer is a material having charge-storing properties which, when used as an electrode active material, is capable of providing a high-performance battery possessing high capacity, high rate characteristics and high cycle characteristics.
    Type: Application
    Filed: March 9, 2016
    Publication date: March 16, 2017
    Applicants: WASEDA UNIVERSITY, NISSAN CHEMICAL INDUSTRIES, LTD.
    Inventors: Hiroyuki NISHIDE, Kenichi OYAIZU, Takuma KAWAI, Takuji YOSHIMOTO
  • Publication number: 20160315266
    Abstract: Provided is a composition comprising: a charge-transporting substance that comprises N,N?-diphenylbenzidine; an electron-accepting dopant substance; and an organic solvent. This composition is suitable, for example, as a composition for the anode buffer layer of an organic thin film solar cell, said composition being used to produce a thin film that is suitable for use as an anode buffer layer that makes it possible to achieve an organic thin film solar cell having a high photoelectric conversion efficiency.
    Type: Application
    Filed: December 5, 2014
    Publication date: October 27, 2016
    Applicant: NISSAN CHEMICAL INDUSTRIES, LTD.
    Inventors: Juro OSHIMA, Takuji YOSHIMOTO
  • Publication number: 20160200850
    Abstract: Provided is an agent for dispersing an electrically conductive carbon material, in which the agent consists of a polymer which has an oxazoline group in a side chain and which is obtained by using an oxazoline group-containing monomer such as that represented by formula (1) for example, and in which the agent exhibits excellent dispersion of an electrically conductive carbon material and produces a thin film that exhibits excellent adhesion to a current collection substrate when formed into a thin film together with the electrically conductive carbon material. (In the formula, X denotes a polymerizable carbon-carbon double bond-containing group, and R1-R4 each independently denote a hydrogen atom, a halogen atom, an alkyl group optionally having a branched structure having 1-5 carbon atoms, an aryl group having 6-20 carbon atoms, or an aralkyl group having 7-20 carbon atoms.
    Type: Application
    Filed: August 25, 2014
    Publication date: July 14, 2016
    Applicant: NISSAN CHEMICAL INDUSTRIES, LTD.
    Inventors: Tatsuya HATANAKA, Yuki SHIBANO, Takuji YOSHIMOTO
  • Patent number: 9251923
    Abstract: A varnish comprising a ground substance consisting of a polymer or oligomer of 200 to 50?104 molecular weight or organic compound of 200 to 1000 molecular weight and a solvent containing a good solvent and a poor solvent whose boiling point (under 760 mmHg) is at least 20° C. lower than that of the good solvent, wherein the ground substance is dissolved in the solvent. Any thin film prepared from this varnish is substantially from generation of foreign matter, so that it can appropriately be used as thin films for electronic devices and those for use in other technical fields.
    Type: Grant
    Filed: April 28, 2005
    Date of Patent: February 2, 2016
    Assignee: NISSAN CHEMICAL INDUSTRIES, LTD.
    Inventors: Taku Kato, Takuji Yoshimoto, Go Ono
  • Patent number: 9172048
    Abstract: A varnish containing a charge-transporting organic material and a solvent is used as a charge-transporting varnish. The charge-transporting organic material is composed of a charge-transporting substance comprising a charge-transporting monomer, or charge-transporting oligomer or polymer having a number average molecular weight of 200 to 500,000, or is composed of such a charge-transporting substance and an electron- or hole-accepting dopant substance. The solvent contains at least one type of high-viscosity solvent having a viscosity of 10 to 200 mPa·s at 20° C. The charge-transporting substance or the charge-transporting organic material is dissolved or uniformly dispersed in the solvent. The varnish has a high uniform film forming capability even in a system using a charge-transporting substance of low molecular weight and a charge-accepting dopant substance.
    Type: Grant
    Filed: November 6, 2003
    Date of Patent: October 27, 2015
    Assignee: NISSAN CHEMICAL INDUSTRIES, LTD.
    Inventors: Takuji Yoshimoto, Go Ono
  • Patent number: 9172043
    Abstract: Disclosed is a charge-transporting varnish containing a charge-transporting organic material, a good solvent, at least one poor solvent with high leveling properties, and at least one volatile poor solvent. The charge-transporting organic material is composed of a charge-transporting material consisting of a charge-transporting monomer or a charge-transporting oligomer having a number average molecular weight of 200 to 5000, or alternatively composed of such a charge-transporting material and an electron-accepting dopant material or a hole-accepting dopant material. This charge-transporting varnish enables to form a uniform and smooth charge-transporting thin film by a spray method or an ink jet method on an exposed electrode portion such as ITO or IZO of a substrate on which a structure of a simple or complicated pattern is formed beforehand.
    Type: Grant
    Filed: October 25, 2006
    Date of Patent: October 27, 2015
    Assignee: NISSAN CHEMICAL INDUSTRIES, LTD.
    Inventors: Taku Kato, Takuji Yoshimoto, Go Ono