Patents by Inventor Satoru Oshitari

Satoru Oshitari 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: 20150064559
    Abstract: An electrode-active material, a lithium-ion battery, and a method for detecting a discharge state of an electrode-active material that make it possible to realize high load characteristics, high cycle characteristics, and high energy density, have a high degree of safety and stability, and make it possible to easily detect the state of a late stage of discharge are disclosed. The electrode-active material is obtained by coating the surface of a particle containing LiwAxDO4 with a coating layer containing LiyEzGO4. In a discharge curve of the electrode-active material, a second region which follows a first region showing a substantially constant discharge potential and shows a drop in a discharge potential includes a third region in which a rate of change in a discharge potential is lower than an average rate of change in a discharge potential of the second region.
    Type: Application
    Filed: March 11, 2013
    Publication date: March 5, 2015
    Inventors: Kouji Oono, Satoru Oshitari, Kazuyo Yamamoto
  • 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: 20140322602
    Abstract: An electrode material includes surface-coated LixAyDzPO4 particles that contain Fe on surfaces of LixAyDzPO4 (wherein A represents one or two or more elements selected from the group consisting of Co, Mn, Ni, 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) particles and include a carbon coating film with which the surfaces of the LixAyDzPO4 particles containing Fe are coated, in which the surface-coated LixAyDzPO4 particles have a Li elution amount of 200 ppm to 700 ppm and a P elution amount of 500 ppm to 2000 ppm when being dipped in a sulfuric acid solution (pH=4) for 24 hours.
    Type: Application
    Filed: April 24, 2014
    Publication date: October 30, 2014
    Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
    Inventors: Akinori YAMAZAKI, Ryuuta YAMAYA, Satoru OSHITARI, Hirofumi YASUMIISHI, Masataka OYAMA
  • Publication number: 20140004425
    Abstract: Provided is a positive electrode active material for lithium ion batteries, which may be in the form of fine particles with good crystallinity and high purity by suppressing grain growth, and which is capable of improving the charge and discharge capacity and high-rate characteristics, a production method thereof, an electrode for lithium ion batteries, and a lithium ion battery. The positive electrode active material for lithium ion batteries of the invention is a positive electrode active material for lithium ion batteries which are formed from LiMPO4 (provided that, M represents one or more kinds selected from a group consisting of Mn, Co, and Ni). In an X-ray diffraction pattern, a ratio I(020)/I(200) of the X-ray intensity I(020) of a (020) plane around a diffraction angle 2? of 29° to the X-ray intensity 1(200) of a (200) plane around a diffraction angle 2? of 17° is 3.00 to 5.00, and a specific surface area is 15 m2/g to 50 m2/g.
    Type: Application
    Filed: March 14, 2012
    Publication date: January 2, 2014
    Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
    Inventors: Kouji Oono, Satoru Oshitari
  • Publication number: 20130337329
    Abstract: Provided is an electrode active material that is obtained by coating a surface of each particle of LiwAxDO4 (provided that, A represents at least one selected from the group consisting of Mn and Co, D represents one or more selected from the group consisting of P, Si, and S, 0<w?4, and 0<x?1.5) with a coating layer containing LiyE2PO4 (provided that, E represents at least one selected from the group consisting of Fe and Ni, 0<y?2, and 0<z?1.5) and a carbonaceous electron conductive material. The electrode active material of the invention may be obtained by drying slurry obtained by suspending particles of LiwAxDO4 in an aqueous solution containing a Li source, an E source, a PO4 source, and a carbon source, and by subjecting the resultant dried product to a heat treatment under a non-oxidizing atmosphere.
    Type: Application
    Filed: March 1, 2012
    Publication date: December 19, 2013
    Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
    Inventors: Kouji Oono, Satoru Oshitari
  • Publication number: 20130337333
    Abstract: Provided is a positive electrode active material for lithium ion batteries, which is capable of realizing stability and safety at a high voltage, a high energy density, high load characteristics, and long-term cycle characteristics by controlling a crystal shape of LiMnPO4 particles having a crystal structure very suitable for Li diffusion or controlling an average primary particle size, a production method thereof, an electrode for lithium ion batteries, and a lithium ion battery. The positive electrode active material for lithium ion batteries of the invention is a positive electrode active material for lithium ion batteries, which is formed from LiMnPO4. Values of lattice constants a, b, and c, which are calculated from an X-ray diffraction pattern, satisfy 10.41 ?<a?10.43 ?, 6.070 ?<b?6.095 ?, and 4.730 ?<C?4.745 ?, and an average particle size is 10 to 100 nm.
    Type: Application
    Filed: March 16, 2012
    Publication date: December 19, 2013
    Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
    Inventors: Kouji Oono, Satoru Oshitari