Patents by Inventor Takashi Nakabayashi

Takashi Nakabayashi 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: 20170155139
    Abstract: Provided are a cathode material for lithium ion secondary battery having excellent rate characteristics and cycle characteristics while a cathode active substance has high density, and a lithium ion secondary battery cathode and a lithium ion secondary battery that use the above cathode material. The cathode material for lithium ion secondary battery (1), represented by Li1+xM11?x?yM2yO2 [where ?0.1?x?0.3, 0?y?0.1; M1 is Ni, Co, Mn; and M2 is Mg, Al, Ti, Zr, Mo, Nb, Fe, B], is an agglomerate including secondary particles (50, 60) both formed via aggregation of lithium metal composite oxide primary particles (10) having a layered structure. A mean porosity of the secondary particles having a particle size of more than 10 ?m and equal to 50 ?m or less is higher than that of the secondary particles having a particle size of 0.5 ?m to 10 ?m.
    Type: Application
    Filed: July 3, 2015
    Publication date: June 1, 2017
    Applicant: HITACHI METALS, LTD.
    Inventors: Xiaoliang FENG, Shuichi TAKANO, Takashi NAKABAYASHI, Akira GUNJI
  • Publication number: 20160276664
    Abstract: An object of the present invention is to provide lithium ion secondary batteries having cycle characteristics as well as high energy density and rate characteristics during high-potential charging of a layered compound. The following is provided, a positive electrode active material for lithium ion secondary batteries, comprising particles each having: a core part comprising a lithium metal composite oxide; and a surface layer part comprising a lithium metal composite oxide having a composition differing from that in the core part, the surface layer part being formed on the surface of the core part, wherein both the core part and the surface layer part have a layered structure, the surface layer part contains Ni, Mn, and Li, and Ni/Mn mole ratio in the surface is less than 1.
    Type: Application
    Filed: February 13, 2015
    Publication date: September 22, 2016
    Applicant: HITACHI METALS, LTD.
    Inventors: Akira GUNJI, Sho FURUTSUKI, Shin TAKAHASHI, Takashi NAKABAYASHI, Shuichi TAKANO, Hisato TOKORO
  • Publication number: 20160254542
    Abstract: The objective of the present invention is to provide a lithium ion secondary battery, the charged state of which can be detected from the battery voltage with high accuracy, and which is able to achieve a high capacity in a high-potential range. This objective can be achieved by a cathode active material for lithium ion secondary batteries, which is composed of a lithium transition metal oxide containing Li and metal elements including at least Ni and Mn, and which is characterized in that: the atomic ratio of Li to the metal elements satisfies 1.15<Lil(metal elements)<1.5; the atomic ratio of Ni to Mn satisfies 0.334<Ni/Mn?1; and the atomic ratio of Ni and Mn to the metal elements satisfies 0.975?(Ni+Mn)/(metal elements)?1.
    Type: Application
    Filed: October 23, 2013
    Publication date: September 1, 2016
    Inventors: Hiroaki KONISHI, Akira GUNJI, Tatsuya TOYAMA, Xiaoliang FENG, Sho FURUTSUKI, Toyotaka YUASA, Mitsuru KOBAYASHI, Hisato TOKORO, Shuichi TAKANO, Takashi NAKABAYASHI
  • Publication number: 20160233686
    Abstract: A power management unit includes a part that transmits a first information data related to a first device for creating, consuming, or accumulating first energy and a second information data related to a second device for creating, consuming, or accumulating second energy to a server. The power management unit further includes a part that receives control data for controlling the first and second devices from the server, and a part that transmits the control data to the first device and the second device. Further, a power management method transmits the first information data and the second information data from the power management unit to the server. Furthermore, the power management method transmits control data for controlling the first device and the second device from the server to the power management unit, and transmits the control data from the power management unit to the first device and the second device.
    Type: Application
    Filed: September 22, 2014
    Publication date: August 11, 2016
    Inventors: JUNSHI YOSHIDA, TAKASHI NAKABAYASHI, KOICHI KUBOYA, YUJI OSUMI, HIROSHI SHIMOSATO, TAMAKI IWASAKI, SEIICHI UNO
  • Publication number: 20160156020
    Abstract: Provided is a method for manufacturing a cathode electrode material, including the step of performing calcination of a mixture of lithium carbonate and a compound containing Ni, and capable of mass-producing a cathode electrode material including a lithium composite oxide with high Ni concentration industrially. The manufacturing method includes a mixture step of mixing lithium carbonate and a compound including Ni, and a calcination step of performing calcination of a mixture obtained in the mixture step under oxidizing atmosphere to obtain a lithium composite compound with high Ni concentration. The calcination step includes: a first heat treatment step to obtain a first precursor; a second heat treatment step of performing heat treatment of the first precursor to obtain a second precursor; and a third heat treatment step of performing heat treatment of the second precursor to obtain the lithium composite compound.
    Type: Application
    Filed: November 10, 2015
    Publication date: June 2, 2016
    Applicant: HITACHI METALS, LTD.
    Inventors: Hisato TOKORO, Akira GUNJI, Tatsuya TOYAMA, Xiaoliang FENG, Mitsuru KOBAYASHI, Shin TAKAHASHI, Shuichi TAKANO, Takashi NAKABAYASHI, Sho FURUTSUKI
  • Publication number: 20160118648
    Abstract: A compound having a layered structure that is used for a positive electrode active material for a lithium ion secondary battery achieves both a high energy density and a high cyclability. The positive electrode active material for a lithium ion secondary battery contains a compound having a layered structure belonging to a space group R-3m, in which the compound having a layered structure is represented by a compositional formula: Li1+aM1O2+?wherein M1 represents a metal element or metal elements other than Li, and contains at least Ni, ?0.03?a?0.10, and ?0.1<?<0.1, a proportion of Ni in M1 is larger than 70 atom %, and a site occupancy of a transition metal or transition metals at a 3a site obtained by structural analysis by a Rietveld method is less than 2%, and a content of residual lithium hydroxide in the positive electrode active material is 1 mass % or less.
    Type: Application
    Filed: October 2, 2015
    Publication date: April 28, 2016
    Applicant: HITACHI METALS, LTD.
    Inventors: Akira GUNJI, Tatsuya TOYAMA, Shin TAKAHASHI, Takashi NAKABAYASHI, Shuichi TAKANO, Xiaoliang FENG, Sho FURUTSUKI, Hisato TOKORO
  • Publication number: 20160099460
    Abstract: A positive electrode active material includes a primary particle represented by Compositional Formula (1): Li1+xNiyCozM1?x?y?zO2 (1), where x is a number satisfying a relation represented by an expression ?0.12?x?0.2; y is a number satisfying a relation represented by an expression 0.7?y?0.9; z is a number satisfying a relation represented by an expression 0.05?z?0.3; and M is at least one element selected from the group consisting of Mg, Al, Ti, Mn, Zr, Mo, and Nb; or a secondary particle into which the primary particle aggregates. The primary particle or the secondary particle includes a free lithium compound in a weight proportion of 0.1% or more and 2.0% or less, and the weight of lithium hydroxide in the free lithium compound is 60% or less of the weight of lithium carbonate in the free lithium compound.
    Type: Application
    Filed: September 29, 2015
    Publication date: April 7, 2016
    Applicant: HITACHI METALS, LTD.
    Inventors: Tatsuya TOYAMA, Shin TAKAHASHI, Akira GUNJI, Xiaoliang FENG, Hisato TOKORO, Takashi NAKABAYASHI, Shuichi TAKANO, Sho FURUTSUKI
  • Patent number: 9224512
    Abstract: A positive electrode active material for a non-aqueous secondary battery having high capacity and high rate characteristics is intended to be provided. Further, a positive electrode for a non-aqueous secondary battery and a non-aqueous secondary battery are intended to be provided by using the positive electrode active material. The positive electrode active material for the non-aqueous secondary battery contains a lithium composite oxide having an olivine structure represented by the chemical formula: Li1+AMnXM1?X(PO4)1+B in which A>0, B>0, M represents a metal element, M in the chemical formula is one or more metal elements selected from Fe, Ni, Co, Ti, Cu, Zn, Mg, V, and Zr, the ratio A/B in the chemical formula is within a range of: 2<A/B?7, and the value of X is within a range of: 0.3?X<1.
    Type: Grant
    Filed: January 29, 2014
    Date of Patent: December 29, 2015
    Assignee: Hitachi Metals, Ltd.
    Inventors: Takashi Nakabayashi, Shin Takahashi, Kan Kitagawa, Toyotaka Yuasa, Shuichi Takano, Mitsuru Kobayashi
  • Publication number: 20150188139
    Abstract: Provided is a positive electrode active material for lithium secondary batteries, which uses a highly safe polyanion compound and has high capacity, high rate characteristics and high energy density. A positive electrode active material for lithium secondary batteries, which contains polyanion compound particles coated with carbon. This positive electrode active material for lithium secondary batteries is characterized in that: the polyanion compound has a structure represented by chemical formula (1); the roughness factor of the polyanion compound, said roughness factor being represented by formula (1), is 1-2; and the average primary particle diameter of the polyanion compound is 10-150 nm. LixMAyOz (chemical formula (1)) (In chemical formula (1), M comprises at least one transition metal element; A represents a typical element that combines with oxygen (O) and forms an anion; 0<x?2, 1?y?2 and 3?z?7.
    Type: Application
    Filed: July 25, 2013
    Publication date: July 2, 2015
    Inventors: Kan Kitagawa, Shuichi Takano, Toyotaka Yuasa, Shin Takahashi, Takashi Nakabayashi, Mitsuru Kobayashi
  • Patent number: 9071040
    Abstract: A partition is formed between an ion generating unit at the windward side and an ion generating unit at the leeward side, so that the amount of airflow to pass through the ion generating unit at the windward side will become more in comparison to the amount of airflow to pass through the ion generating unit at the leeward side.
    Type: Grant
    Filed: June 10, 2011
    Date of Patent: June 30, 2015
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Toshio Mamiya, Masato Urushisaki, Takashi Nakabayashi
  • Patent number: 8911901
    Abstract: The object of the present invention is to inhibit occurrence of structural collapse caused by volumetric change of primary particles of negative electrode active material and to improve adhesion between negative electrode active material and electrically conductive agent and between negative electrode mix layer and collector, whereby improvement of life is attained in negative electrode for non-aqueous secondary battery and non-aqueous secondary battery. In the negative electrode for non-aqueous secondary battery of the present invention, the negative electrode active material comprises silicon and/or tin, and at least one element selected from elements which do not react with lithium and has pores in both of the inner core portion and the outer peripheral portion of primary particles and a material which cures by a heat treatment is used as a binder.
    Type: Grant
    Filed: February 14, 2012
    Date of Patent: December 16, 2014
    Assignee: Hitachi, Ltd.
    Inventors: Takashi Nakabayashi, Shin Takahashi
  • Patent number: 8895186
    Abstract: It is an objective of the present invention to provide a lithium-ion rechargeable battery anode which can control the volume change of a primary particle of a negative-electrode active material other than a carbon-based material and that can prevent cracks due to stress caused by the volume change from occurring and extending. There is provided an anode for a lithium-ion rechargeable battery including a primary particle of a negative-electrode active material, a conductive material, and a binder, the negative-electrode active material including at least one of silicon and tin, and at least one element selected from elements that do not chemically react with lithium, in which holes are present both in an inner core region in the central region of the primary particle of the negative-electrode active material and in a periphery region that covers the inner core region.
    Type: Grant
    Filed: May 27, 2011
    Date of Patent: November 25, 2014
    Assignee: Hitachi, Ltd.
    Inventors: Takashi Nakabayashi, Shin Takahashi, Motoki Ohta, Yoshihito Yoshizawa
  • Publication number: 20140264067
    Abstract: The air conditioning device discharges ions into air inflowing through an inflow port and outflows the air from the outflow port. The air conditioning device includes an air passage branched into a first passage connected to a peripheral region including a part of a space close to an inner surface of the outflow port and a second passage connected to a central region including a center of the outflow port. The first passage is narrowed continuously from the upstream to the downstream of the air flow, so that the air passing through the first passage is accelerated to outflow at a higher speed than the air passing through the second passage. The ions contained in the air outflowing while passing through the second passage are blocked from charged things around the outflow port by the high-speed air outflowing while passing through the first passage.
    Type: Application
    Filed: June 12, 2012
    Publication date: September 18, 2014
    Applicant: SHARP KABUSHIKI KAISHA
    Inventor: Takashi Nakabayashi
  • Publication number: 20140209832
    Abstract: A positive electrode active material for a non-aqueous secondary battery having high capacity and high rate characteristics is intended to be provided. Further, a positive electrode for a non-aqueous secondary battery and a non-aqueous secondary battery are intended to be provided by using the positive electrode active material. The positive electrode active material for the non-aqueous secondary battery contains a lithium composite oxide having an olivine structure represented by the chemical formula: Li1+AMnXM1?X(PO4)1+B in which A>0, B>0, M represents a metal element, M in the chemical formula is one or more metal elements selected from Fe, Ni, Co, Ti, Cu, Zn, Mg, V, and Zr, the ratio A/B in the chemical formula is within a range of: 2<A/B?7, and the value of X is within a range of: 0.3?X<1.
    Type: Application
    Filed: January 29, 2014
    Publication date: July 31, 2014
    Applicant: Hitachi Metals, Ltd.
    Inventors: Takashi NAKABAYASHI, Shin TAKAHASHI, Kan KITAGAWA, Toyotaka YUASA, Shuichi TAKANO, Mitsuru KOBAYASHI
  • Patent number: 8481115
    Abstract: A method for producing coated, fine metal particles each having a Ti oxide coating and a silicon oxide coating formed in this order on a metal core particle by mixing powder comprising TiC and TiN with oxide powder of a metal M meeting the relation of ?GM-O>?GTiO2, wherein ?GM-O represents the standard free energy of forming an oxide of the metal M; heat-treating the resultant mixed powder in a non-oxidizing atmosphere to reduce the oxide of the metal M with the powder comprising TiC and TiN, while coating the resultant metal M particles with Ti oxide; coating the Ti-oxide-coated surface with silicon oxide; and classifying the resultant particles such that they have a median diameter d50 of 0.4-0.7 ?m, and a variation coefficient (=standard deviation/average particle size) of 35% or less, which indicates a particle size distribution range.
    Type: Grant
    Filed: March 26, 2009
    Date of Patent: July 9, 2013
    Assignee: Hitachi Metals, Ltd.
    Inventors: Hisato Tokoro, Takashi Nakabayashi, Shigeo Fujii
  • Publication number: 20130126749
    Abstract: A partition is formed between an ion generating unit at the windward side and an ion generating unit at the leeward side, so that the amount of airflow to pass through the ion generating unit at the windward side will become more in comparison to the amount of airflow to pass through the ion generating unit at the leeward side.
    Type: Application
    Filed: June 10, 2011
    Publication date: May 23, 2013
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Toshio Mamiya, Masato Urushisaki, Takashi Nakabayashi
  • Publication number: 20120219858
    Abstract: The object of the present invention is to inhibit occurrence of structural collapse caused by volumetric change of primary particles of negative electrode active material and to improve adhesion between negative electrode active material and electrically conductive agent and between negative electrode mix layer and collector, whereby improvement of life is attained in negative electrode for non-aqueous secondary battery and non-aqueous secondary battery. In the negative electrode for non-aqueous secondary battery of the present invention, the negative electrode active material comprises silicon and/or tin, and at least one element selected from elements which do not react with lithium and has pores in both of the inner core portion and the outer peripheral portion of primary particles and a material which cures by a heat treatment is used as a binder.
    Type: Application
    Filed: February 14, 2012
    Publication date: August 30, 2012
    Inventors: Takashi NAKABAYASHI, Shin TAKAHASHI
  • Patent number: 8247074
    Abstract: A method for producing coated, fine metal particles comprising the steps of mixing powder comprising TiC and TiN with powder of an oxide of a metal M meeting the relation of ?GM-O>?GTiO2, wherein ?GM-O represents the standard free energy of formation of metal M oxide, and heat-treating the resultant mixed powder in a non-oxidizing atmosphere to reduce the oxide of the metal M with the powder comprising TiC and TiN, while coating the resultant metal M particles with Ti oxide, and coated, fine metal particles each comprising a metal core particle and a Ti oxide coating and having a carbon content of 0.2-1.4% by mass and a nitrogen content of 0.01-0.2% by mass.
    Type: Grant
    Filed: September 18, 2007
    Date of Patent: August 21, 2012
    Assignee: Hitachi Metals, Ltd.
    Inventors: Hisato Tokoro, Shigeo Fujii, Takashi Nakabayashi
  • Publication number: 20110293940
    Abstract: A method for producing coated, fine metal particles each having a Ti oxide coating and a silicon oxide coating formed in this order on a metal core particle by mixing powder comprising TiC and TiN with oxide powder of a metal M meeting the relation of ?GM-O>?GTiO2, wherein ?GM-O represents the standard free energy of forming an oxide of the metal M; heat-treating the resultant mixed powder in a non-oxidizing atmosphere to reduce the oxide of the metal M with the powder comprising TiC and TiN, while coating the resultant metal M particles with Ti oxide; coating the Ti-oxide-coated surface with silicon oxide; and classifying the resultant particles such that they have a median diameter d50 of 0.4-0.7 ?m, and a variation coefficient (=standard deviation/average particle size) of 35% or less, which indicates a particle size distribution range.
    Type: Application
    Filed: March 26, 2009
    Publication date: December 1, 2011
    Applicant: HITACHI METALS, LTD
    Inventors: Hisato Tokoro, Takashi Nakabayashi, Shigeo Fujii
  • Publication number: 20110294012
    Abstract: It is an objective of the present invention to provide a lithium-ion rechargeable battery anode which can control the volume change of a primary particle of a negative-electrode active material other than a carbon-based material and that can prevent cracks due to stress caused by the volume change from occurring and extending. There is provided an anode for a lithium-ion rechargeable battery including a primary particle of a negative-electrode active material, a conductive material, and a binder, the negative-electrode active material including at least one of silicon and tin, and at least one element selected from elements that do not chemically react with lithium, in which holes are present both in an inner core region in the central region of the primary particle of the negative-electrode active material and in a periphery region that covers the inner core region.
    Type: Application
    Filed: May 27, 2011
    Publication date: December 1, 2011
    Inventors: Takashi Nakabayashi, Shin Takahashi, Motoki Ohta, Yoshihito Yoshizawa