Patents by Inventor Sho Tsuruta

Sho Tsuruta 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: 11522188
    Abstract: An advantage is to provide a non-aqueous electrolyte secondary battery with improved heat resistance. A positive electrode active material contains a lithium-transition metal composite oxide containing 80 mol % or more of Ni and 0.1 mol % to 1.5 mol % of B on the basis of the total number of moles of metal elements excluding Li, and B and at least one element (M1) selected from Groups 4 to 6 are present on at least the surfaces of particles of the composite oxide. When particles having a volume-based particle size larger than 70% particle size (D70) are first particles, and particles having a volume-based particle size smaller than 30% particle size (D30) are second particles, the molar fraction of M1 on the basis of the total number of moles of metallic elements excluding Li on the surfaces of the second particles is greater than that of the first particles.
    Type: Grant
    Filed: September 22, 2020
    Date of Patent: December 6, 2022
    Assignees: PANASONIC HOLDINGS CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Takashi Ko, Shinya Suzuki, Fumiharu Niina, Sho Tsuruta, Natsumi Goto, Ryo Hanazaki
  • Publication number: 20220367869
    Abstract: A positive electrode active material that can achieve high thermal stability at low cost is provided. Provided is a positive electrode active material for a lithium ion secondary battery, the positive electrode active material containing a lithium-nickel-manganese composite oxide, in which metal elements constituting the lithium-nickel-manganese composite oxide include lithium (Li), nickel (Ni), manganese (Mn), cobalt (Co), titanium (Ti), niobium (Nb), and optionally zirconium (Zr), an amount of substance ratio of the elements is represented as Li:Ni:Mn:Co:Zr:Ti:Nb=a:b:c:d:e:f:g (provided that, 0.97?a?1.10, 0.80?b?0.88, 0.04?c?0.12, 0.04?d?0.10, 0?e?0.004, 0.003<f?0.030, 0.001<g?0.006, and b+c+d+e+f+g=1), and in the amount of substance ratio, (f+g)?0.030 and f>g are satisfied.
    Type: Application
    Filed: June 30, 2020
    Publication date: November 17, 2022
    Applicants: SUMITOMO METAL MINING CO., LTD., PANASONIC CORPORATION
    Inventors: Yuki Koshika, Haruki Kaneda, Sho Tsuruta, Takashi Ko, Fumiharu Niina
  • Publication number: 20220320490
    Abstract: This positive electrode active material for a nonaqueous electrolyte secondary battery includes a lithium transition metal composite oxide that contains at least 80 mol % of Ni with respect to the total number of moles of metal elements excluding Li. B is present at least on the surfaces of the particles of the composite oxide. When particles having a particle diameter larger than a volume-based particle diameter of 70% (D70) are defined as first particles and particles having a particle diameter smaller than a volume-based particle diameter of 30% (D30) are defined as second particles, the molar fraction of B with respect to the total number of moles of metal elements excluding Li in the second particles is higher than the molar fraction of B with respect to the total number of moles of metal elements excluding Li in the first particles.
    Type: Application
    Filed: August 28, 2020
    Publication date: October 6, 2022
    Applicant: Panasonic Corporation
    Inventors: Natsumi Goto, Takashi Ko, Shinya Suzuki, Fumiharu Niina, Sho Tsuruta
  • Publication number: 20220278325
    Abstract: This positive electrode active material for nonaqueous electrolyte secondary batteries is a positive electrode active material that comprises a lithium transition metal composite oxide containing at least 80 mol % Ni with reference to the total number of moles of metal elements excluding Li, and that has B present on the particle surface of at least this composite oxide. Assuming that a particle having a particle diameter larger than the 70% volume-based particle diameter (D70) is denoted as a first particle and a particle having a particle diameter smaller than the 30% volume-based particle diameter (D30) is denoted as a second particle, the mole fraction of B, with reference to the total number of moles of metal elements excluding Li, in the first particle is larger than the mole fraction of B, with reference to the total number of moles of metal elements excluding Li, in the second particle.
    Type: Application
    Filed: August 25, 2020
    Publication date: September 1, 2022
    Applicant: Panasonic Corporation
    Inventors: Natsumi Goto, Takashi Ko, Shinya Suzuki, Fumiharu Niina, Sho Tsuruta
  • Publication number: 20220271284
    Abstract: A positive electrode active material for nonaqueous electrolyte secondary batteries contains a lithium transition metal composite oxide that contains not less than 80% by mole of Ni relative to the total number of moles of metal elements other than Li; and Ti is present at least in the surfaces of particles of the composite oxide. With respect to this positive electrode active material, if particles having a volume-based particle diameter more than the 70% particle diameter (D70) are taken as first particles and particles having a volume-based particle diameter less than the 30% particle diameter (D30) are taken as second particles, the molar fraction (A2) of Ti relative to the total number of moles of metal elements in the surfaces of the second particles is higher than the molar fraction (A1) of Ti relative to the total number of moles of metal elements in the surfaces of the first particles.
    Type: Application
    Filed: July 21, 2020
    Publication date: August 25, 2022
    Applicant: Panasonic Corporation
    Inventors: Shinya Suzuki, Takashi Ko, Fumiharu Niina, Sho Tsuruta, Katsunori Yanagida, Natsumi Goto
  • Publication number: 20220166007
    Abstract: In a nonaqueous electrolyte secondary battery, a positive electrode contains a positive electrode active material A. The positive electrode active material A includes: a lithium transition metal composite oxide represented by a general formula of LiaNibCocMndAleMfOg (in the formula, M is at least one element selected from Groups IV, V, and VI, and 0.8?a?1.2, b?0.82, 0<c?0.08, 0.05?d?0.12, 0?e?0.05, 0.01?f?0.05, and 1?g?2 are satisfied) in the form of particles; a first layer composed of a lithium metal compound represented by a general formula of LixMyOz (in the formula, 1?x?4, 1?y?5, and 1?z?12 are satisfied) and formed on each particle surface of the lithium transition metal composite oxide; and a second layer composed of a boron compound and formed on the first layer. The first layer is formed over the entire particle surface of the lithium transition metal composite oxide without the second layer being interposed therebetween.
    Type: Application
    Filed: January 27, 2020
    Publication date: May 26, 2022
    Applicant: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Takashi Ko, Shinya Suzuki, Fumiharu Niina, Sho Tsuruta, Katsunori Yanagida
  • Publication number: 20210296638
    Abstract: Disclosed is a non-aqueous electrolyte secondary battery positive electrode that includes a positive electrode core and a positive electrode mixture layer disposed on the positive electrode core. The positive electrode mixture layer contains a positive electrode active material and carbon nanotubes. The positive electrode active material contains a lithium transition metal composite oxide (I) that either comprises secondary particles that are aggregates of primary particles having an average particle size of 1 ?m or greater, or is substantially composed of single particles, the lithium transition metal composite oxide (I) having a volume-based median diameter of 0.6 ?m to 6 ?m, and a lithium transition metal composite oxide (II) that comprises secondary particles that are aggregates of primary particles having an average particle size of less than 1 ?m, the lithium transition metal composite oxide (II) having a volume-based median diameter of 3 ?m to 25 ?m.
    Type: Application
    Filed: March 11, 2021
    Publication date: September 23, 2021
    Applicants: Panasonic Corporation, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kohei Kintsu, Takashi Ko, Natsumi Goto, Keiichi Takahashi, Fumiharu Niina, Sho Tsuruta, Ryo Hanazaki, Akira Tsujiko
  • Publication number: 20210234151
    Abstract: A positive electrode material consists of composite particles. Each of the composite particles includes a base material particle, a film, and a carbon nanotube. The film covers at least a part of a surface of the base material particle. The base material particle includes a positive electrode active material. The film includes a boron oxide. The carbon nanotube includes a first portion and a second portion. The first portion is buried in the film. The second portion is exposed on a surface of the film.
    Type: Application
    Filed: January 21, 2021
    Publication date: July 29, 2021
    Applicants: Toyota Jidosha Kabushiki Kaisha, Panasonic Corporation
    Inventors: Ryo Hanazaki, Takashi Ko, Natsumi Goto, Sho Tsuruta, Kohei Kintsu
  • Publication number: 20210135214
    Abstract: A positive electrode active material for a non-aqueous electrolyte secondary battery according to a configuration includes a lithium-transition metal composite oxide containing nickel (Ni) in an amount of greater than or equal to 80 mol %, in which boron (B) is present at least on a particle surface of the lithium-transition metal composite oxide. In the lithium-transition metal composite oxide, when particles having a larger particle size than a volume-based 70% particle size (D70) are first particles and particles having a smaller particle size than a volume-based 30% particle size (D30) are second particles, a coverage ratio of B on surfaces of the second particle is larger than a coverage ratio of B on surfaces of the first particle by 5% or greater.
    Type: Application
    Filed: October 27, 2020
    Publication date: May 6, 2021
    Applicants: Panasonic Corporation, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Natsumi Goto, Takashi Ko, Shinya Suzuki, Fumiharu Niina, Sho Tsuruta, Ryo Hanazaki
  • Publication number: 20210135213
    Abstract: A positive electrode active material for a non-aqueous electrolyte secondary battery according to a configuration includes a lithium-transition metal composite oxide containing nickel (Ni) in an amount of greater than or equal to 80 mol %, in which boron (B) is present at least on a particle surface of the lithium-transition metal composite oxide. In the lithium-transition metal composite oxide, when particles having a larger particle size than a volume-based 70% particle size (D70) are first particles and particles having a smaller particle size than a volume-based 30% particle size (D30) are second particles, a coverage ratio of B on surfaces of the first particles is larger than a coverage ratio of B on surfaces of the second particles by 5% or greater.
    Type: Application
    Filed: October 27, 2020
    Publication date: May 6, 2021
    Applicants: Panasonic Corporation, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Natsumi Goto, Takashi Ko, Shinya Suzuki, Fumiharu Niina, Sho Tsuruta, Ryo Hanazaki
  • Publication number: 20210098786
    Abstract: An advantage is to provide a non-aqueous electrolyte secondary battery with improved heat resistance. A positive electrode active material contains a lithium-transition metal composite oxide containing 80 mol % or more of Ni and 0.1 mol % to 1.5 mol % of B on the basis of the total number of moles of metal elements excluding Li, and B and at least one element (M1) selected from Groups 4 to 6 are present on at least the surfaces of particles of the composite oxide. When particles having a volume-based particle size larger than 70% particle size (D70) are first particles, and particles having a volume-based particle size smaller than 30% particle size (D30) are second particles, the molar fraction of M1 on the basis of the total number of moles of metallic elements excluding Li on the surfaces of the second particles is greater than that of the first particles.
    Type: Application
    Filed: September 22, 2020
    Publication date: April 1, 2021
    Applicants: Panasonic Corporation, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Takashi Ko, Shinya Suzuki, Fumiharu Niina, Sho Tsuruta, Natsumi Goto, Ryo Hanazaki
  • Patent number: 10256469
    Abstract: A high-capacity nonaqueous electrolyte secondary battery having good load characteristics is provided. The nonaqueous electrolyte secondary battery includes a positive electrode containing a positive electrode active material, a negative electrode, and a nonaqueous electrolyte. The positive electrode contains the active material composed of a lithium transition metal oxide and a positive electrode additive composed of an oxide that contains Li and at least two elements other than Li and oxygen and has an antifluorite structure. The nonaqueous electrolyte secondary battery obtained is charged until the potential of the positive electrode is 4.0 V or higher and 4.65 V or lower (vs. Li/Li+).
    Type: Grant
    Filed: January 20, 2015
    Date of Patent: April 9, 2019
    Assignee: SANYO Electric Co., Ltd.
    Inventors: Atsushi Kawamura, Kazuhiro Hasegawa, Sho Tsuruta, Atsushi Fukui
  • Patent number: 9923244
    Abstract: Provided is a nonaqueous electrolyte secondary battery in which the structural change of a positive electrode active material is suppressed at high voltage and which can achieve high capacity and long life. The nonaqueous electrolyte secondary battery includes a positive electrode containing a positive electrode active material storing and releasing lithium ions, a negative electrode containing a negative electrode active material storing and releasing lithium ions, and a nonaqueous electrolyte. The positive electrode active material is a cobalt composite oxide which has a layered rock salt structure and which includes a lithium layer containing magnesium, magnesium is present in the lithium layer after charge is performed at a potential of 4.53 V or more versus lithium, and 4.5 mole percent to 10 mole percent of a magnesium-containing compound is present on the negative electrode with respect to magnesium in the positive electrode.
    Type: Grant
    Filed: March 2, 2015
    Date of Patent: March 20, 2018
    Assignee: SANYO ELECTRIC CO., LTD.
    Inventors: Yuu Takanashi, Atsushi Fukui, Kazuhiro Hasegawa, Sho Tsuruta
  • Patent number: 9876222
    Abstract: A nonaqueous electrolyte secondary battery which can suppress the change in structure of a positive electrode active material at a high voltage is provided. The nonaqueous electrolyte secondary battery has a positive electrode including a positive electrode active material which absorbs and releases lithium ions; a negative electrode including a negative electrode active material which absorbs and releases lithium ions; and a nonaqueous electrolyte. The positive electrode active material has a surface to which a rare earth compound is adhered and includes a lithium cobalt composite oxide containing at least one type selected from the group consisting of Ni, Mn, Ca, Cu, Zn, Sr, Ge, Sn, Si, P, Nb, Mo, S, and W, and charge is performed so that the potential of the positive electrode is 4.53 V or more with reference to lithium.
    Type: Grant
    Filed: September 10, 2013
    Date of Patent: January 23, 2018
    Assignee: SANYO Electric Co., Ltd.
    Inventors: Yuu Takanashi, Kazuhiro Hasegawa, Sho Tsuruta, Atsushi Fukui
  • Publication number: 20170155145
    Abstract: A nonaqueous electrolyte secondary battery that releases a reduced amount of gas when stored in a highly charged state at high temperatures, including a positive electrode containing a positive electrode active material capable of storing and releasing lithium ions, a negative electrode containing a negative electrode active material capable of storing and releasing lithium ions, and a nonaqueous electrolyte, wherein the positive electrode active material includes secondary particles formed by the aggregation of primary particles including a lithium transition metal oxide containing lithium, cobalt, nickel, manganese and aluminum, the secondary particles have on the surface thereof a recess formed between the primary particles adjacent to one another and a compound containing boron and oxygen is attached to the recess, and the proportion of cobalt in the lithium transition metal oxide is not less than 80 mol % relative to the total molar amount of the metal elements except lithium.
    Type: Application
    Filed: September 7, 2015
    Publication date: June 1, 2017
    Applicant: Sanyo Electric Co., Ltd.
    Inventors: Miki Kusachi, Sho Tsuruta, Takeshi Ogasawara
  • Publication number: 20170062801
    Abstract: A non-aqueous electrolyte secondary battery having a high capacity and a long life is provided by eliminating or reducing the structural change of a positive electrode active material at high voltages. The non-aqueous electrolyte secondary battery includes a positive electrode having a positive electrode active material that intercalates and deintercalates lithium ions, a negative electrode having a negative electrode active material that intercalates and deintercalates lithium ions, and a non-aqueous electrolyte. The positive electrode active material includes a lithium-cobalt composite oxide containing nickel, manganese, aluminum, and germanium. The percentage of cobalt in the lithium-cobalt composite oxide is 80 mol % or more with respect the total molar amount of metal elements except lithium.
    Type: Application
    Filed: December 19, 2014
    Publication date: March 2, 2017
    Applicants: Sanyo Electric Co., Ltd., Sanyo Electric Co., Ltd.
    Inventors: Yuu Takanashi, Sho Tsuruta, Atsushi Fukui, Kazuhiro Hasegawa
  • Publication number: 20170018808
    Abstract: Provided is a nonaqueous electrolyte secondary battery in which the structural change of a positive electrode active material is suppressed at high voltage and which can achieve high capacity and long life. The nonaqueous electrolyte secondary battery includes a positive electrode containing a positive electrode active material storing and releasing lithium ions, a negative electrode containing a negative electrode active material storing and releasing lithium ions, and a nonaqueous electrolyte. The positive electrode active material is a cobalt composite oxide which has a layered rock salt structure and which includes a lithium layer containing magnesium, magnesium is present in the lithium layer after charge is performed at a potential of 4.53 V or more versus lithium, and 4.5 mole percent to 10 mole percent of a magnesium-containing compound is present on the negative electrode with respect to magnesium in the positive electrode.
    Type: Application
    Filed: March 2, 2015
    Publication date: January 19, 2017
    Applicant: SANYO ELECTRIC CO., LTD.
    Inventors: Yuu TAKANASHI, Atsushi FUKUI, Kazuhiro HASEGAWA, Sho TSURUTA
  • Publication number: 20160351887
    Abstract: Provided is a nonaqueous electrolyte secondary battery which is capable of achieving high capacity and long life by suppressing the structural change of a positive electrode active material at high voltage. The nonaqueous electrolyte secondary battery includes a positive electrode containing a positive electrode active material storing and releasing lithium ions, a negative electrode containing a negative electrode active material storing and releasing lithium ions, and a nonaqueous electrolyte. The positive electrode active material is a lithium-cobalt composite oxide containing nickel, manganese, and aluminium and has a rare-earth compound or oxide deposited to a portion of the surface thereof.
    Type: Application
    Filed: January 27, 2015
    Publication date: December 1, 2016
    Applicant: SANYO Electric Co., Ltd.
    Inventors: Yuu Takanashi, Kazuhiro Hasegawa, Sho Tsuruta, Atsushi Fukui
  • Publication number: 20160351905
    Abstract: A high-capacity nonaqueous electrolyte secondary battery having good load characteristics is provided. The nonaqueous electrolyte secondary battery includes a positive electrode containing a positive electrode active material, a negative electrode, and a nonaqueous electrolyte. The positive electrode contains the active material composed of a lithium transition metal oxide and a positive electrode additive composed of an oxide that contains Li and at least two elements other than Li and oxygen and has an antifluorite structure. The nonaqueous electrolyte secondary battery obtained is charged until the potential of the positive electrode is 4.0 V or higher and 4.65 V or lower (vs. Li/Li+).
    Type: Application
    Filed: January 20, 2015
    Publication date: December 1, 2016
    Applicant: SANYO ELECTRIC CO., LTD.
    Inventors: Atsushi KAWAMURA, Kazuhiro HASEGAWA, Sho TSURUTA, Atsushi FUKUI
  • Publication number: 20150372304
    Abstract: A nonaqueous electrolyte secondary battery that has high capacity and good load properties. A nonaqueous electrolyte secondary battery includes a positive electrode for a nonaqueous electrolyte secondary battery, a negative electrode, a separator interposed between the positive electrode for a nonaqueous electrolyte secondary battery and the negative electrode, and an electrolyte. The positive electrode for a nonaqueous electrolyte secondary battery includes a positive electrode current collector and a positive electrode active material layer disposed on the positive electrode current collector, the positive electrode active material layer containing a positive electrode active material and a positive electrode additive. The positive electrode additive contains a Li-containing compound that generates gas at 4.2 V (vs. Li/Li+) or less during first charging of the nonaqueous electrolyte secondary battery.
    Type: Application
    Filed: October 4, 2013
    Publication date: December 24, 2015
    Applicant: SANYO ELECTRIC CO., LTD.
    Inventors: Kazuhiro Hasegawa, Atsushi Kawamura, Sho Tsuruta, Atsushi Fukui