Patents by Inventor Natsumi GOTO

Natsumi GOTO 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: 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: 20210159498
    Abstract: In a non-aqueous electrolyte secondary battery according to one exemplary embodiment, a separator includes a substrate, a first filler layer containing phosphate particles and formed on at least one surface of the substrate, and a second filler layer containing inorganic particles and formed on a surface of the first filler layer on the side of the at least one surface of the substrate. The phosphate particles have a BET specific surface area of 5 m2/g or more and 100 m2/g or less.
    Type: Application
    Filed: December 14, 2018
    Publication date: May 27, 2021
    Applicant: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Natsumi Goto, Masanori Sugimori, Yasunori Baba, Katsunori Yanagida, Nobuhiro Hirano
  • 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: 10553856
    Abstract: The present invention provides a nonaqueous electrolyte secondary battery capable of suppressing the increase in IV resistance of a battery in a combination of a negative electrode containing a lithium-titanium composite oxide and a carbon material and a positive electrode containing a lithium transition metal oxide. A nonaqueous electrolyte secondary battery according to the present invention includes a positive electrode, a negative electrode, a separator placed between the positive electrode and the negative electrode, and a nonaqueous electrolyte. The positive electrode contains a lithium transition metal oxide in which Ni accounts for 30 mole percent or more of the total molar amount of metal elements excluding Li and also contains tungsten element. The negative electrode contains a lithium-titanium composite oxide and a carbon material. The nonaqueous electrolyte contains a substance reduced on the negative electrode at a potential of 0.5 V to 1.5 V (vs. Li/Li+).
    Type: Grant
    Filed: November 21, 2016
    Date of Patent: February 4, 2020
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Natsumi Goto, Masanori Sugimori, Kouhei Tuduki, Katsunori Yanagida
  • Publication number: 20190173085
    Abstract: A nonaqueous electrolyte secondary battery according to the present invention includes a positive electrode, a negative electrode, a separator placed between the positive electrode and the negative electrode, and a nonaqueous electrolyte. The positive electrode contains a first lithium transition metal oxide in which Ni accounts for 30 mole percent or more of the total molar amount of metal elements excluding Li; a second lithium transition metal oxide in which Co and Ni account for 60 mole percent or more and 20 mole percent or less, respectively, of the total molar amount of metal elements excluding Li; and tungsten element. The negative electrode contains a lithium-titanium composite oxide.
    Type: Application
    Filed: November 21, 2016
    Publication date: June 6, 2019
    Applicant: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Masanori Sugimori, Natsumi Goto, Kouhei Tuduki, Katsunori Yanagida
  • Publication number: 20180309116
    Abstract: The present invention provides a nonaqueous electrolyte secondary battery capable of suppressing the increase in IV resistance of a battery in a combination of a negative electrode containing a lithium-titanium composite oxide and a carbon material and a positive electrode containing a lithium transition metal oxide. A nonaqueous electrolyte secondary battery according to the present invention includes a positive electrode, a negative electrode, a separator placed between the positive electrode and the negative electrode, and a nonaqueous electrolyte. The positive electrode contains a lithium transition metal oxide in which Ni accounts for 30 mole percent or more of the total molar amount of metal elements excluding Li and also contains tungsten element. The negative electrode contains a lithium-titanium composite oxide and a carbon material. The nonaqueous electrolyte contains a substance reduced on the negative electrode at a potential of 0.5 V to 1.5 V (vs. Li/Li+).
    Type: Application
    Filed: November 21, 2016
    Publication date: October 25, 2018
    Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LT D.
    Inventors: Natsumi Goto, Masanori Sugimori, Kouhei Tuduki, Katsunori Yanagida
  • Patent number: 10103382
    Abstract: A nonaqueous electrolyte secondary battery disclosed in the present application includes: a positive electrode capable of absorbing and releasing lithium, containing a positive electrode active material composed of a lithium-containing transition metal oxide having a layered crystalline structure; and a negative electrode capable of absorbing and releasing lithium, containing a negative electrode active material composed of a lithium-containing transition metal oxide obtained by substituting some of Ti element of a lithium-containing titanium oxide having a spinel crystalline structure with one or more element different from Ti, wherein a retention of the negative electrode is set to be greater than a retention of the positive electrode, and an irreversible capacity rate of the negative electrode is set to be greater than an irreversible capacity rate of the positive electrode, whereby a discharge ends by negative electrode limitation.
    Type: Grant
    Filed: November 3, 2016
    Date of Patent: October 16, 2018
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Natsumi Goto, Takashi Takeuchi, Masaki Hasegawa
  • Publication number: 20180048014
    Abstract: The present invention aims to provide a non-aqueous electrolyte secondary battery in which the amount of a gas generated during charge/discharge cycles, during storage, or the like is small although a cellulose-made separator is used. A non-aqueous electrolyte secondary battery which is one example of an embodiment includes a positive electrode including a positive electrode collector and a positive electrode mixture layer formed thereon; a negative electrode including a negative electrode collector and a negative electrode mixture layer formed thereon; a separator formed from a cellulose as a primary component; and a fluorine-containing non-aqueous electrolyte. In the positive electrode mixture layer, a lithium transition metal oxide and a phosphoric acid compound are contained.
    Type: Application
    Filed: April 13, 2016
    Publication date: February 15, 2018
    Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO. LTD.
    Inventors: Masanori Sugimori, Katsunori Yanagida, Natsumi Goto
  • Publication number: 20180034112
    Abstract: The present invention aims to suppress gas generation during charge/discharge cycles, storage, and the like when a group IV to VI oxide, such as a lithium titanate, is used as a negative electrode active material. A non-aqueous electrolyte secondary battery includes a positive electrode having a positive electrode collector and a positive electrode mixture layer formed thereon, a negative electrode having a negative electrode collector and a negative electrode mixture layer formed thereon, and a fluorine-containing non-aqueous electrolyte. In the positive electrode mixture layer, a lithium transition metal oxide and a phosphoric acid compound are contained. In the negative electrode mixture layer, a group IV to VI oxide is contained which contains at least one type of element selected from a group IV element, a group V element, and a group VI element of the periodic table and which has a BET specific surface area of 2.0 m2/g or more.
    Type: Application
    Filed: February 18, 2016
    Publication date: February 1, 2018
    Applicant: Sanyo Electric Co., Ltd.
    Inventors: Natsumi Goto, Katsunori Yanagida, Masanori Sugimori
  • Publication number: 20170346089
    Abstract: There is provided a battery pack capable of supplying a stable output and of being charged stably in a low temperature environment (for instance, 0° C. or lower). A battery pack (1) includes: a battery group (11) having a first battery (10A) and a second battery (10B) disposed around the first battery (10A); and a heater (14) that is disposed on an outer peripheral side of the battery group (11), famed by the second battery (10B), and that generates heat by being energized by the first battery (10A). The first battery (10A) is allowed to be charged and discharged with a higher current than a current of the second battery (10B) in a temperature range lower than or equal to a predetermined temperature.
    Type: Application
    Filed: December 17, 2015
    Publication date: November 30, 2017
    Applicant: Sanyo Electric Co., Ltd.
    Inventors: Takashi Yamamoto, Takayuki Mino, Kenichi Morina, Natsumi Goto, Katsunori Yanagida
  • Publication number: 20170256801
    Abstract: Provided is a nonaqueous electrolyte secondary battery in which the generation of gas is suppressed in charge/discharge cycles. The nonaqueous electrolyte secondary battery includes a positive electrode, a negative electrode, a separator placed therebetween, and a nonaqueous electrolyte. The positive electrode includes a positive electrode active material containing a lithium transition metal oxide. The positive electrode contains tungsten oxide. Tungsten is present in the form of a solid solution in the lithium transition metal oxide. Tungsten oxide is attached to the surface of the lithium transition metal oxide. The separator contains cellulose. Tungsten in tungsten oxide contained in the positive electrode is preferably 0.01 mole percent to 3.0 mole percent with respect to transition metals, excluding lithium, in the lithium transition metal oxide.
    Type: Application
    Filed: August 25, 2015
    Publication date: September 7, 2017
    Applicant: SANYO Electric Co., Ltd.
    Inventors: Masanori Sugimori, Natsumi Goto, Katsunori Yanagida
  • Publication number: 20170054150
    Abstract: A nonaqueous electrolyte secondary battery disclosed in the present application includes: a positive electrode capable of absorbing and releasing lithium, containing a positive electrode active material composed of a lithium-containing transition metal oxide having a layered crystalline structure; and a negative electrode capable of absorbing and releasing lithium, containing a negative electrode active material composed of a lithium-containing transition metal oxide obtained by substituting some of Ti element of a lithium-containing titanium oxide having a spinel crystalline structure with one or more element different from Ti, wherein a retention of the negative electrode is set to be greater than a retention of the positive electrode, and an irreversible capacity rate of the negative electrode is set to be greater than an irreversible capacity rate of the positive electrode, whereby a discharge ends by negative electrode limitation.
    Type: Application
    Filed: November 3, 2016
    Publication date: February 23, 2017
    Inventors: Natsumi GOTO, Takashi TAKEUCHI, Masaki HASEGAWA
  • Patent number: 9287562
    Abstract: A negative-electrode active material disclosed herein contains a lithium titanate having a spinel structure, and satisfies the relationship B×P<50, where B is a specific surface (unit: m2/g) of the lithium titanate as measured by a BET technique; and P is obtained by immersing 1 g of the lithium titanate in 50 cm3 of redistilled water and determining a pH of the redistilled water after 30 minutes of agitation.
    Type: Grant
    Filed: November 27, 2012
    Date of Patent: March 15, 2016
    Assignee: Panasonic Intellectual Property Management Corporation Co., Ltd.
    Inventors: Takashi Takeuchi, Masaki Hasegawa, Natsumi Goto
  • Patent number: 9065148
    Abstract: A negative electrode active material for a lithium ion secondary battery contains a lithium titanium complex oxide having a composition expressed as Li4Ti5-xMnxO12 (where 0<x?0.3), Li4Ti5-x-yMnxVyO12 (where 0<x?0.3, 0<y?0.05), or Li4Ti5-x-zMnxBzO12 (where 0<x?0.3, 0<z?0.3).
    Type: Grant
    Filed: February 10, 2012
    Date of Patent: June 23, 2015
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Natsumi Goto, Takashi Takeuchi, Masaki Hasegawa
  • Publication number: 20150099177
    Abstract: A nonaqueous electrolyte secondary battery disclosed in the present application includes: a positive electrode capable of absorbing and releasing lithium, containing a positive electrode active material composed of a lithium-containing transition metal oxide having a layered crystalline structure; and a negative electrode capable of absorbing and releasing lithium, containing a negative electrode active material composed of a lithium-containing transition metal oxide obtained by substituting some of Ti element of a lithium-containing titanium oxide having a spinel crystalline structure with one or more element different from Ti, wherein a retention of the negative electrode is set to be greater than a retention of the positive electrode, and an irreversible capacity rate of the negative electrode is set to be greater than an irreversible capacity rate of the positive electrode, whereby a discharge ends by negative electrode limitation.
    Type: Application
    Filed: October 23, 2014
    Publication date: April 9, 2015
    Inventors: Natsumi GOTO, Takashi TAKEUCHI, Masaki HASEGAWA
  • Patent number: 8962187
    Abstract: A negative electrode active material for lithium ion secondary batteries of the present invention includes a lithium-titanium composite oxide that has a composition represented by Li4Ti5-xFexO12 (where x satisfies 0<x?0.3) or Li4Ti5-yMnyO12 (where y satisfies 0<y?0.3) and that has an average particle diameter of primary particles which is not less than 1 ?m.
    Type: Grant
    Filed: December 11, 2012
    Date of Patent: February 24, 2015
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Natsumi Goto, Takashi Takeuchi, Masaki Hasegawa
  • Patent number: 8920976
    Abstract: A nonaqueous electrolyte secondary battery disclosed in the present application includes: a positive electrode capable of absorbing and releasing lithium, containing a positive electrode active material composed of a lithium-containing transition metal oxide having a layered crystalline structure; and a negative electrode capable of absorbing and releasing lithium, containing a negative electrode active material composed of a lithium-containing transition metal oxide obtained by substituting some of Ti element of a lithium-containing titanium oxide having a spinel crystalline structure with one or more element different from Ti, wherein a retention of the negative electrode is set to be greater than a retention of the positive electrode, and an irreversible capacity rate of the negative electrode is set to be greater than an irreversible capacity rate of the positive electrode, whereby a discharge ends by negative electrode limitation.
    Type: Grant
    Filed: April 18, 2012
    Date of Patent: December 30, 2014
    Assignee: Panasonic Corporation
    Inventors: Natsumi Goto, Takashi Takeuchi, Masaki Hasegawa