Patents by Inventor Takao Kitagawa

Takao Kitagawa 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: 20150194675
    Abstract: An electrode material, an electrode, and a lithium ion battery in which it is possible to improve not only the amount of gas generated in the battery during charge and discharge but also the deterioration of battery components without reducing the charge and discharge capacity are provided. The electrode material is an electrode material including carbonaceous electrode active material complex particles which include a carbonaceous material on surfaces of electrode active material particles, in which an oxygen content rate in the carbonaceous material is 5.0% by mass or less, and a coating ratio of the carbonaceous material on the surfaces of the carbonaceous electrode active material complex particles is 60% or more.
    Type: Application
    Filed: March 24, 2015
    Publication date: July 9, 2015
    Inventors: Hiroyuki MINE, Takao KITAGAWA
  • Publication number: 20150140428
    Abstract: An electrode material having excellent electron conductivity, load characteristics, and cycle characteristics is provided. The electrode material includes an electrode active material represented by LixFeyAzBO4 (here, A represents either or both selected from a group consisting of Mn and Co, B represents one or more selected from a group consisting of P, Si, and S, 0?x<4, 0<y<1.5, and 0?z<1.5) as a main component and nickel, particle surfaces of the electrode active material are coated with a carbonaceous film, and a content of the nickel is in a range of 1 ppm to 100 ppm.
    Type: Application
    Filed: January 29, 2015
    Publication date: May 21, 2015
    Inventors: Kouji OONO, Takao KITAGAWA
  • Publication number: 20150118558
    Abstract: An electrode material of the present invention includes surface-coated LixAyDzPO4 particles obtained by coating surfaces of LixAyDzPO4 (in which, A represents one or more selected from the group consisting of Co, Mn, Ni, Fe, Cu and Cr, D represents one or more selected from the group consisting of Mg, Ca, Sr, Ba, Ti, Zn, B, Al, Ga, In, Si, Ge, Sc, Y and rare earth elements, 0<x?2, 0<y?1, and 0?z?1.5) particles with a carbonaceous coat, and an elution amount of Li is in a range of 200 ppm to 700 ppm and an elution amount of P is in a range of 500 ppm to 2000 ppm when the surface-coated LixAyDzPO4 particles are immersed in a sulfuric acid solution having a hydrogen-ion exponent of 4 for 24 hours.
    Type: Application
    Filed: January 22, 2013
    Publication date: April 30, 2015
    Inventors: Akinori Yamazaki, Yoshitaka Yamamoto, Takao Kitagawa, Hirofumi Yasumiishi
  • Publication number: 20150099175
    Abstract: The present invention provides an electrode material in which unevenness in a supporting amount of a carbonaceous film is less when using an electrode-active material having a carbonaceous film on a surface thereof as the electrode material, and which is capable of improving conductivity, and a method for producing the electrode material. The electrode material includes an aggregate formed by aggregating an electrode-active material in which a carbonaceous film is formed on a surface. In the electrode material, an average particle size of the aggregate is 0.5 to 100 ?m, a volume density of the aggregate is 50 to 80 vol % of a volume density in a case in which the aggregate is a solid, and 80% or more of the surface of the electrode-active material is covered with the carbonaceous film. Alternatively, the electrode material includes an aggregate formed by aggregating electrode-active material particles in which a carbonaceous film is formed on a surface.
    Type: Application
    Filed: December 11, 2014
    Publication date: April 9, 2015
    Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
    Inventors: Takao KITAGAWA, Hirofumi YASUMIISHI, Masaru UEHARA
  • Publication number: 20140356716
    Abstract: Provided are an electrode material and an electrode which, when an electrode active material having a carbonaceous coat formed on the surface is used as an electrode material, have a small variation in an amount of the carbonaceous coat being supported and, furthermore, can improve electron conductivity, and a method of manufacturing the electrode material. The electrode material is made of an agglomerate formed by agglomerating particles of an electrode active material having a carbonaceous coat formed on a surface, the average particle diameter of the agglomerate is in a range of 1.0 ?m to 100 ?m, the volume density of the agglomerate is in a range of 50% by volume to 80% by volume of the volume density of a solid form of the agglomerate, the pore size distribution of pores in the agglomerate is mono-modal, and the average pore diameter in the pore size distribution is 0.3 ?m or less.
    Type: Application
    Filed: September 5, 2012
    Publication date: December 4, 2014
    Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
    Inventors: Takao Kitagawa, Masaru Uehara
  • Publication number: 20140339582
    Abstract: In order to improve the color and luminance uniformity of an LED chip with a phosphor-containing resin sheet obtained by adhering the phosphor-containing resin sheet to the LED chip, improve the ease of production, and improve the degree of freedom in design, etc., provided is a resin sheet laminate provided with a phosphor-containing resin sheet on a base material, wherein the phosphor-containing resin sheet is divided into a plurality of sections.
    Type: Application
    Filed: April 24, 2012
    Publication date: November 20, 2014
    Inventors: Nobuo Matsumura, Yutaka Ishida Matsumura, Kazunari Kawamoto, Takejiro Inoue, Hironobu Sadakuni, Masshiro Yoshioka, Takao Kitagawa
  • Publication number: 20140335413
    Abstract: An electrode material includes Fe-containing olivine-structured LixAyDzPO4 (wherein A represents one or more elements selected from the group consisting of Co, Mn, Ni, Cu, and Cr; D represents one or more elements selected from the group consisting of Mg, Ca, Sr, Ba, Ti, Zn, B, Al, Ga, In, Si, Ge, Sc, Y, and rare earth elements; 0<x?2; 0<y?1; and 0?z?1.5) particles that are coated with a carbon coating film, in which an abundance of Fe is 0.01 to 0.1 mol with respect to 1 mol of LixAyDzPO4, and an abundance ratio (Fe/(Fe+A+D)) of Fe on surfaces of the LixAyDzPO4 particles is 0.02 to 0.25.
    Type: Application
    Filed: April 28, 2014
    Publication date: November 13, 2014
    Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
    Inventors: Kenta OOISHI, Takao KITAGAWA, Kouji OONO, Satoru OSHITARI
  • Publication number: 20140322613
    Abstract: An electrode material is provided in which a carbon coating film containing an ion-conductive material is formed on surfaces of electrode-active material particles, and at least a portion of a surface of the ion-conductive material is exposed without being coated with the carbon coating film or the ion-conductive material is surrounded by the carbon coating film.
    Type: Application
    Filed: April 23, 2014
    Publication date: October 30, 2014
    Inventors: Takao KITAGAWA, Tetsuya NAKABEPPU
  • Publication number: 20140322604
    Abstract: An electrode-active material includes sulfur or a sulfur compound in particles represented by LixAyDzPO4 (wherein A represents one or two or more elements selected from the group consisting of Co, Mn, Ni, Fe, Cu, and Cr; D represents one or two or more elements selected from the group consisting of Mg, Ca, Sr, Ba, Ti, Zn, B, Al, Ga, In, Si, Ge, Sc, Y, and rare earth elements; 0<x<2; 0<y<1; and 0?z<1.5), in which a sulfur content in the particles is high in the centers of the particles and is low in the vicinity of surfaces of the particles.
    Type: Application
    Filed: April 23, 2014
    Publication date: October 30, 2014
    Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
    Inventors: Takao KITAGAWA, Akinori YAMAZAKI
  • Publication number: 20140287310
    Abstract: An electrode material which can improve the mobility of electrons and the mobility of ions at the same time, and, furthermore, does not have a problem of the impairment of the diffusion of lithium ions in a thin layer containing a carbonaceous electron-conductive substance so as to be excellent in terms of load characteristics and energy density, and an electrode and a lithium ion battery are provided. The electrode material of the invention is produced by forming a thin layer made of a carbonaceous electron-conductive substance on surfaces of primary particles made of an electrode active material, in which the carbonaceous electron-conductive substance contains nitrogen atoms.
    Type: Application
    Filed: March 20, 2014
    Publication date: September 25, 2014
    Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
    Inventors: Koji OONO, Takao KITAGAWA, Tatsuya NAKABEPPU, Kazuyo YAMAMOTO
  • Publication number: 20140272593
    Abstract: An electrode material contains an agglomerate formed by agglomerating a plurality of agglomerated particles formed by agglomerating a plurality of particles of a carbonaceous coated electrode active material having a carbonaceous coat formed on a surface, the agglomerate is made up of hollow-structured particles and solid-structured particles, the average particle diameter of the agglomerate is in a range of 0.5 ?m to 100 ?m, the volume density of the agglomerate is in a range of 50% by volume to 80% by volume, the micropore distribution of micropores present in the agglomerate is monomodal, the average micropore diameter in the micropore distribution is 0.3 ?m or less, and the NMP oil absorption amount of the agglomerate is in a range of 40 g/100 g to 100 g/100 g.
    Type: Application
    Filed: March 10, 2014
    Publication date: September 18, 2014
    Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
    Inventors: Kenta OOISHI, Koji OONO, Takao KITAGAWA, Tetsuya NAKABEPPU
  • Publication number: 20140212761
    Abstract: An electrode material of the invention includes an agglomerate formed by agglomerating carbonaceous coated electrode active material particles obtained by forming a carbonaceous coat on surfaces of electrode active material particles at a coating rate of 80% or more, and the carbonaceous coated electrode active material particles include first carbonaceous coated electrode active material particles on which a carbonaceous coat having a film thickness in a range of 0.1 nm to 3.0 nm and an average film thickness in a range of 1.0 nm to 2.0 nm is formed and second carbonaceous coated electrode active material particles on which a carbonaceous coat having a film thickness in a range of 1.0 nm to 10.0 nm and an average film thickness in a range of more than 2.0 nm to 7.0 nm is formed.
    Type: Application
    Filed: January 27, 2014
    Publication date: July 31, 2014
    Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
    Inventors: Takao KITAGAWA, Tetsuya NAKABEPPU
  • Publication number: 20140106224
    Abstract: An electrode material containing an electrode active material, and a carbonaceous coating film which covers the electrode active material and contains sulfur; and an electrode material including a secondary particle including a plurality of primary particles as the electrode active material, wherein the primary particles are covered with a carbonaceous coating film so that the carbonaceous coating film is interposed between the primary particles and the carbonaceous coating film contains sulfur.
    Type: Application
    Filed: December 19, 2013
    Publication date: April 17, 2014
    Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
    Inventors: Takao KITAGAWA, Mitsumasa SAITO
  • Patent number: 8658316
    Abstract: An electrode material containing an electrode active material, and a carbonaceous coating film which covers the electrode active material and contains sulfur; and an electrode material including a secondary particle including a plurality of primary particles as the electrode active material, wherein the primary particles are covered with a carbonaceous coating film so that the carbonaceous coating film is interposed between the primary particles and the carbonaceous coating film contains sulfur.
    Type: Grant
    Filed: December 10, 2008
    Date of Patent: February 25, 2014
    Assignee: Sumitomo Osaka Cement Co., Ltd.
    Inventors: Takao Kitagawa, Mitsumasa Saito
  • Publication number: 20130264601
    Abstract: The present invention provides a phosphor sheet in which the optical properties thereof are not impaired and which exhibits excellent film thickness uniformity even when comprising large-sized phosphor particles in high concentration. In one embodiment, the invention provides a phosphor sheet in which the content of phosphor is 53 weight % or more of the total sheet, and in another embodiment, a phosphor sheet includes at least a silicone resin, a phosphor and silicone fine particles.
    Type: Application
    Filed: December 1, 2011
    Publication date: October 10, 2013
    Applicant: Toray Industries, Inc.
    Inventors: Nobuo Matsumura, Yutaka Ishida, Kazunari Kawamoto, Kazuki Goto, Takao Kitagawa, Takejiro Inoue, Hironobu Sadakuni, Hiroki Sekiguchi, Masahiro Yoshioka
  • Publication number: 20130266843
    Abstract: The present invention provides a positive electrode for a non-aqueous electrolyte secondary battery in which the charge/discharge rate of a secondary battery is increased by increasing the discharge/discharge rate of the positive electrode as a result of increasing the rate of incorporation and release of lithium ions in olivine-type phosphorous complex compound particles, a non-aqueous electrolyte secondary battery provided with this positive electrode for a non-aqueous electrolyte secondary battery, and a battery module provided with this non-aqueous electrolyte secondary battery.
    Type: Application
    Filed: December 14, 2011
    Publication date: October 10, 2013
    Applicants: SUMITOMO OSAKA CEMENT CO., LTD., ELIIY POWER CO., LTD.
    Inventors: Tomitaro Hara, Takao Fukunaga, Takayasu Iguchi, Takao Kitagawa, Yoshitaka Yamamoto
  • Publication number: 20130260245
    Abstract: The present invention provides an electrode material in which unevenness in a supporting amount of a carbonaceous film is less when using an electrode-active material having a carbonaceous film on a surface thereof as the electrode material, and which is capable of improving conductivity, and a method for producing the electrode material. The electrode material includes an aggregate formed by aggregating an electrode-active material in which a carbonaceous film is formed on a surface. In the electrode material, an average particle size of the aggregate is 0.5 to 100 ?m, a volume density of the aggregate is 50 to 80 vol % of a volume density in a case in which the aggregate is a solid, and 80% or more of the surface of the electrode-active material is covered with the carbonaceous film. Alternatively, the electrode material includes an aggregate formed by aggregating electrode-active material particles in which a carbonaceous film is formed on a surface.
    Type: Application
    Filed: November 28, 2011
    Publication date: October 3, 2013
    Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
    Inventors: Takao Kitagawa, Hirofumi Yasumiishi, Masaru Uehara
  • Publication number: 20130125365
    Abstract: A phosphor-containing cured silicone that is a cured silicone which has a structure represented by general formulae (1) and/or (2) and also has units selected from general formulae (3) and/or (4), the phosphor-containing cured silicone includes a phosphor and particles having units selected from general formulae (3) and/or (4): wherein R1 to R3 are each a hydrogen atom, a methyl group, an ethyl group or a propyl group; X represents a methylene group, a dimethylene group or a trimethylene group, and may be the same or different; and R4 to R6 are each a substituted or unsubstituted monovalent hydrocarbon group, and may be the same or different. An object of the present invention is to provide a cured silicone in which a phosphor is uniformly dispersed, the cured silicone is characterized in that a silicone material has good thermal resistance and lightfastness.
    Type: Application
    Filed: February 9, 2011
    Publication date: May 23, 2013
    Inventors: Kazuki Goto, Tetsuya Goto, Masuichi Eguchi, Takao Kitagawa, Kazunari Kawamoto, Yutaka Ishida, Hirofumi Tsuchiya, Takayoshi Akamatsu
  • Patent number: 7875749
    Abstract: An aqueous solution containing a quaternary ammonium salt as a guest compound of a clathrate hydrate, having a property of producing the clathrate hydrate when cooled, and further containing a phosphate of an alkali metal added thereto. A clathrate hydrate produced by cooling an aqueous solution containing a quaternary ammonium salt and a phosphate of an alkali metal, wherein the quaternary ammonium salt is the guest compound.
    Type: Grant
    Filed: September 3, 2009
    Date of Patent: January 25, 2011
    Assignee: JFE Engineering Corporation
    Inventors: Keiji Tomura, Shingo Takao, Takao Kitagawa
  • Publication number: 20100261063
    Abstract: An electrode material containing an electrode active material, and a carbonaceous coating film which covers the electrode active material and contains sulfur; and an electrode material including a secondary particle including a plurality of primary particles as the electrode active material, wherein the primary particles are covered with a carbonaceous coating film so that the carbonaceous coating film is interposed between the primary particles and the carbonaceous coating film contains sulfur.
    Type: Application
    Filed: December 10, 2008
    Publication date: October 14, 2010
    Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
    Inventors: Takao Kitagawa, Mitsumasa Saito