Patents by Inventor Keizo Koga

Keizo Koga 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: 11532853
    Abstract: Provided is a battery including a positive electrode, a negative electrode, an electrolytic solution, and a particle-containing resin layer that contains particles and a resin. A shape of the particles includes a plane, a plane rate of the particles is greater than 40% and equal to or less than 100%, and a refractive index of the particles is equal to or greater than 1.3 and less than 2.4.
    Type: Grant
    Filed: April 29, 2020
    Date of Patent: December 20, 2022
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Kazuhito Hatta, Keiichi Kagami, Nobuaki Shimosaka, Keizo Koga
  • Publication number: 20200259147
    Abstract: Provided is a battery including a positive electrode, a negative electrode, an electrolytic solution, and a particle-containing resin layer that contains particles and a resin. A shape of the particles includes a plane, a plane rate of the particles is greater than 40% and equal to or less than 100%, and a refractive index of the particles is equal to or greater than 1.3 and less than 2.4.
    Type: Application
    Filed: April 29, 2020
    Publication date: August 13, 2020
    Inventors: KAZUHITO HATTA, KEIICHI KAGAMI, NOBUAKI SHIMOSAKA, KEIZO KOGA
  • Patent number: 10665841
    Abstract: Provided is a battery including a positive electrode, a negative electrode, an electrolytic solution, and a particle-containing resin layer that contains particles and a resin. A shape of the particles includes a plane, a plane rate of the particles is greater than 40% and equal to or less than 100%, and a refractive index of the particles is equal to or greater than 1.3 and less than 2.4.
    Type: Grant
    Filed: August 28, 2014
    Date of Patent: May 26, 2020
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Kazuhito Hatta, Keiichi Kagami, Nobuaki Shimosaka, Keizo Koga
  • Patent number: 10270128
    Abstract: A particle size D50 of the particle is not less than 50 nm and not more than 450 nm, or not less than 750 nm and not more than 10,000 nm. A refractive index of the particle is not less than 1.3 and less than 2.4. One of a mass ratio between the particles and the matrix polymer compound (particles/matrix polymer compound) and a mass ratio between the particles and the electrolyte salt (particles/electrolyte salt) is not less than 15/85 and not more than 90/10.
    Type: Grant
    Filed: October 16, 2014
    Date of Patent: April 23, 2019
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Kazuhito Hatta, Keiichi Kagami, Nobuaki Shimosaka, Keizo Koga
  • Patent number: 10263278
    Abstract: Provided is a battery including a positive electrode, a negative electrode, a separator, and an electrolyte that contains particles, a resin, and an electrolytic solution. The shape of the particles includes a plane, a plane rate of the particles is greater than 40% and equal to or less than 100%, and a refractive index of the particles is equal to or greater than 1.3 and less than 2.4.
    Type: Grant
    Filed: August 28, 2014
    Date of Patent: April 16, 2019
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Kazuhito Hatta, Keiichi Kagami, Nobuaki Shimosaka, Keizo Koga
  • Patent number: 10084201
    Abstract: A gel electrolyte layer is provided between a positive electrode and a second electrode. The gel electrolyte layer is a layer containing particles, a resin material, and a polymer compound for retaining the resin material, and having a heat capacity per unit area of 0.0001 J/Kcm2 or more and a heat capacity per unit volume of 3.0 J/Kcm3 or less.
    Type: Grant
    Filed: February 21, 2014
    Date of Patent: September 25, 2018
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Kazuhito Hatta, Keiichi Kagami, Nobuaki Shimosaka, Toshitsugu Ono, Keizo Koga
  • Patent number: 9954212
    Abstract: A battery includes electrodes including a positive electrode and a negative electrode; and a particle-containing insulating part that is provided between the positive electrode and the negative electrode and includes particles and a resin, wherein the particles are a material capable of undergoing an endothermic dehydration reaction and have a flat shape with an aspect ratio of 2/1 or more.
    Type: Grant
    Filed: August 11, 2014
    Date of Patent: April 24, 2018
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Keiichi Kagami, Kazuhito Hatta, Nobuaki Shimosaka, Keizo Koga
  • Publication number: 20170155137
    Abstract: A positive active material is provided. The positive active material includes particles of lithium nickelate and an olivine compound having an olivine crystal structure, wherein surfaces of the particles of lithium nickelate are covered with the olivine compound. The lithium nickelate is expressed by a general formula LiyNi1-zM?zO2 where 0.05?y?1.2 and 0?z?0.5, and M? includes Fe, Co, Mn, Cu, Zn, Al, Sn, B, Ga, Cr, V, Ti, Mg, Ca, Sr and mixtures thereof. The olivine compound is expressed by a general formula LixMPO4 where 0.05?x?1.2, and M includes Fe, Mn, Co, Ni, Cu, Zn, Mg and mixtures thereof. A non-aqueous electrolyte secondary battery including the positive active material is also provided.
    Type: Application
    Filed: February 14, 2017
    Publication date: June 1, 2017
    Inventors: Izaya OKAE, Keizo KOGA, Takehiko TANAKA
  • Publication number: 20160254511
    Abstract: Provided is a battery including a positive electrode, a negative electrode, an electrolytic solution, and a particle-containing resin layer that contains particles and a resin. A shape of the particles includes a plane, a plane rate of the particles is greater than 40% and equal to or less than 100%, and a refractive index of the particles is equal to or greater than 1.3 and less than 2.4.
    Type: Application
    Filed: August 28, 2014
    Publication date: September 1, 2016
    Inventors: KAZUHITO HATTA, KEIICHI KAGAMI, NOBUAKI SHIMOSAKA, KEIZO KOGA
  • Publication number: 20160248115
    Abstract: Provided is a battery including a positive electrode, a negative electrode, a separator, and an electrolyte that contains particles, a resin, and an electrolytic solution. The shape of the particles includes a plane, a plane rate of the particles is greater than 40% and equal to or less than 100%, and a refractive index of the particles is equal to or greater than 1.3 and less than 2.4.
    Type: Application
    Filed: August 28, 2014
    Publication date: August 25, 2016
    Inventors: KAZUHITO HATTA, KEIICHI KAGAMI, NOBUAKI SHIMOSAKA, KEIZO KOGA
  • Publication number: 20160240887
    Abstract: A particle size D50 of the particle is not less than 50 nm and not more than 450 nm, or not less than 750 nm and not more than 10,000 nm. A refractive index of the particle is not less than 1.3 and less than 2.4. One of a mass ratio between the particles and the matrix polymer compound (particles/matrix polymer compound) and a mass ratio between the particles and the electrolyte salt (particles/electrolyte salt) is not less than 15/85 and not more than 90/10.
    Type: Application
    Filed: October 16, 2014
    Publication date: August 18, 2016
    Inventors: KAZUHITO HATTA, KEIICHI KAGAMI, NOBUAKI SHIMOSAKA, KEIZO KOGA
  • Publication number: 20160233474
    Abstract: A battery includes electrodes including a positive electrode and a negative electrode; and a particle-containing insulating part that is provided between the positive electrode and the negative electrode and includes particles and a resin, wherein the particles are a material capable of undergoing an endothermic dehydration reaction and have a flat shape with an aspect ratio of 2/1 or more.
    Type: Application
    Filed: August 11, 2014
    Publication date: August 11, 2016
    Inventors: Keiichi KAGAMI, Kazuhito HATTA, Nobuaki SHIMOSAKA, Keizo KOGA
  • Publication number: 20160043429
    Abstract: A gel electrolyte layer is provided between a positive electrode and a second electrode. The gel electrolyte layer is a layer containing particles, a resin material, and a polymer compound for retaining the resin material, and having a heat capacity per unit area of 0.0001 J/Kcm2 or more and a heat capacity per unit volume of 3.0 J/Kcm3 or less.
    Type: Application
    Filed: February 21, 2014
    Publication date: February 11, 2016
    Applicant: Sony Corporation
    Inventors: Kazuhito HATTA, Keiichi KAGAMI, Nobuaki SHIMOSAKA, Toshitsugu ONO, Keizo KOGA
  • Patent number: 8298707
    Abstract: A positive active material including a compound expressed by a general formula LimMxM?yM?zO2 (here, M designates at least one kind of element selected from Co, Ni and Mn, M? designates at least one kind of element selected from Al, Cr, V, Fe, Cu, Zn, Sn, Ti, Mg, Sr, B, Ga, In, Si and Ge, and M? designates at least one kind of element selected from Mg, Ca, B and Ga. Further, x is designated by an expression of 0.9?x<1, y is indicated by an expression of 0.001?y?0.5, z is indicated by an expression of 0?z?0.5, and m is indicated by an expression of 0.5?m) and lithium manganese oxide expressed by a general formula LisMn2-tMatO4 (here, the value of s is expressed by 0.9?s, the value of t is located within a range expressed by 0.01?t?0.5, and Ma indicates one or a plurality of elements between Fe, Co, Ni, Cu, Zn, Al, Sn, Cr, V, Ti, Mg, Ca, Sr, B, Ga, In, Si and Ge) are included, so that both a large capacity and the suppression of the rise of temperature of a battery upon overcharging operation are achieved.
    Type: Grant
    Filed: December 14, 2005
    Date of Patent: October 30, 2012
    Assignee: Sony Corporation
    Inventors: Takehiko Tanaka, Yosuke Hosoya, Yoshikatsu Yamamoto, Kiyohiko Suzuki, Keizo Koga
  • Publication number: 20100129719
    Abstract: A negative electrode mixture is provided and includes: a negative electrode active material containing a carbon based material; a binder containing at least a polyacrylonitrile based resin; and a polymer capable of suppressing an intermolecular interaction between cyano groups and imparting a steric hindrance.
    Type: Application
    Filed: November 24, 2009
    Publication date: May 27, 2010
    Applicant: SONY CORPORATION
    Inventors: Hirotomo Ito, Keizo Koga, Takashi Murakami
  • Publication number: 20080292969
    Abstract: A gel electrolyte secondary battery includes a positive electrode, a negative electrode containing a binder-containing negative electrode mixture and a gel non-aqueous electrolyte, wherein the binder contains polyvinylidene fluoride and polyacrylonitrile or a styrene-butadiene rubber.
    Type: Application
    Filed: May 15, 2008
    Publication date: November 27, 2008
    Applicant: Sony Corporation
    Inventors: Tamami Mori, Fumiko Kimura, Keizo Koga, Yayoi Horiuchi
  • Publication number: 20060093914
    Abstract: A positive active material including a compound expressed by a general formula LimMxM?yM?zO2 (here, M designates at least one kind of element selected from Co, Ni and Mn, M? designates at least one kind of element selected from Al, Cr, V, Fe, Cu, Zn, Sn, Ti, Mg, Sr, B, Ga, In, Si and Ge, and M? designates at least one kind of element selected from Mg, Ca, B and Ga. Further, x is designated by an expression of 0.9?x<1, y is indicated by an expression of 0.001?y?0.5, z is indicated by an expression of 0?z?0.5, and m is indicated by an expression of 0.5?m) and lithium manganese oxide expressed by a general formula LisMn2-tMatO4 (here, the value of s is expressed by 0.9?s, the value of t is located within a range expressed by 0.01?t?0.5, and Ma indicates one or a plurality of elements between Fe, Co, Ni, Cu, Zn, Al, Sn, Cr, V, Ti, Mg, Ca, Sr, B, Ga, In, Si and Ge) are included, so that both a large capacity and the suppression of the rise of temperature of a battery upon overcharging operation are achieved.
    Type: Application
    Filed: December 14, 2005
    Publication date: May 4, 2006
    Inventors: Takehiko Tanaka, Yosuke Hosoya, Yoshikatsu Yamamoto, Kiyohiko Suzuki, Keizo Koga
  • Publication number: 20050019660
    Abstract: A non-aqueous electrolyte battery includes a cathode, an anode and a non-aqueous electrolyte. The anode uses as an anode active material graphite whose Gs value obtained by a formula (1) from a surface-enhanced Raman spectrum measured by using an argon laser beam is 20 or smaller. Gs=Hsg/Hsd??(1) (Here, Hsg represents the height of a signal having a peak within a range of 1580 cm?1 to 1620 cm?1 and Hsd represents the height of a signal having a peak within a range of 1350 cm?1 to 1400 cm?1.) Thus, the high capacity, the high filling characteristics and the low temperature load characteristics of an anode material are improved.
    Type: Application
    Filed: June 23, 2004
    Publication date: January 27, 2005
    Inventors: Keizo Koga, Atsuo Omaru
  • Publication number: 20040096743
    Abstract: A positive active material is provided. The positive active material includes particles of lithium nickelate and an olivine compound having an olivine crystal structure, wherein surfaces of the particles of lithium nickelate are covered with the olivine compound. The lithium nickelate is expressed by a general formula LiyNi1-zM′zO2 where 0.05≦y≦1.2 and 0≦z≦0.5, and M′ includes Fe, Co, Mn, Cu, Zn, Al, Sn, B, Ga, Cr, V, Ti, Mg, Ca, Sr and mixtures thereof. The olivine compound is expressed by a general formula LixMPO4 where 0.05≦x≦1.2, and M includes Fe, Mn, Co, Ni, Cu, Zn, Mg and mixtures thereof. A non-aqueous electrolyte secondary battery using the positive active material has a high discharge capacity and a good high-temperature stability because of the combination of advantages of lithium nickelate and the olivine compound of the positive active material.
    Type: Application
    Filed: August 22, 2003
    Publication date: May 20, 2004
    Inventors: Izaya Okae, Keizo Koga, Takehiko Tanaka
  • Publication number: 20030134200
    Abstract: A positive active material including a compound expressed by a general formula LimMxM′yM″zO2 (here, M designates at least one kind of element selected from Co, Ni and Mn, M′ designates at least one kind of element selected from Al, Cr, V, Fe, Cu, Zn, Sn, Ti, Mg, Sr, B, Ga, In, Si and Ge, and M″ designates at least one kind of element selected from Mg, Ca, B and Ga. Further, x is designated by an expression of 0.9≦x<1, y is indicated by an expression of 0.001≦y≦0.5, z is indicated by an expression of 0≦z≦0.5, and m is indicated by an expression of 0.5≦m) and lithium manganese oxide expressed by a general formula LisMn2−tMatO4 (here, the value of s is expressed by 0.9≦s, the value of t is located within a range expressed by 0.01≦t≦0.
    Type: Application
    Filed: October 25, 2002
    Publication date: July 17, 2003
    Inventors: Takehiko Tanaka, Yosuke Hosoya, Yoshikatsu Yamamoto, Kiyohiko Suzuki, Keizo Koga