Patents Assigned to Tanaka Chemical Corporation
  • Patent number: 11932548
    Abstract: A method for manufacturing a lithium hydroxide powder includes a pulverizing step of pulverizing coarse particles of lithium hydroxide to obtain lithium hydroxide powder; and a carbonation-suppressing step of storing the lithium hydroxide powder in an airtight container in an atmosphere satisfying requirements (1) and (2). (1) A partial pressure of carbon dioxide gas is 100 Pa or less with respect to a total amount of gas present in the airtight container. (2) A relative humidity in the airtight container is 60% or less.
    Type: Grant
    Filed: February 28, 2019
    Date of Patent: March 19, 2024
    Assignees: SUMITOMO CHEMICAL COMPANY, LIMITED, TANAKA CHEMICAL CORPORATION
    Inventors: Kenji Gouda, Keiichiro Suzuki, Jun-ichi Kageura
  • Publication number: 20240038980
    Abstract: A positive electrode material for a nickel metal hydride secondary battery and a method for producing the positive electrode material for a nickel hydrogen secondary battery, capable of improving characteristics of a nickel metal hydride secondary battery by lowering volume resistivity, are provided. The positive electrode material for a nickel metal hydride secondary battery has, in a differential pore distribution in which a pore diameter range is 1.7 nm or more and 300 nm or less, a local maximum value of a highest peak of a differential pore volume positioned in a range of a pore diameter of 1.7 nm or more and 10.0 nm or less.
    Type: Application
    Filed: October 11, 2023
    Publication date: February 1, 2024
    Applicant: TANAKA CHEMICAL CORPORATION
    Inventors: Naotoshi Satomi, Mikio Hata, Naoya Hanamura
  • Publication number: 20240010517
    Abstract: Provided is a method of manufacturing a composite hydroxide that can appropriately control a BET specific surface area. The method of manufacturing a composite hydroxide containing at least nickel (Ni) and cobalt (Co), wherein a first metal-containing aqueous solution containing A mol % of nickel (Ni) and B mol % of cobalt (Co), a second metal-containing aqueous solution containing C mol % of nickel (Ni) and D mol % of cobalt (Co), wherein A>C, B<D, A+B=100, and C+D=100, an aqueous solution of an alkali metal, and an aqueous solution containing an ammonium-ion supplying material, are separately fed into a reaction vessel; and a solution in the reaction vessel is maintained to have a pH value based on a liquid temperature at 25° C. within a range of 10.0 or higher and 13.0 or lower and a concentration of ammonium ion within a range of 1.0 g/L, or more and 10.0 g/L or less.
    Type: Application
    Filed: September 29, 2022
    Publication date: January 11, 2024
    Applicant: TANAKA CHEMICAL CORPORATION
    Inventors: Kazuki KATAGIRI, Yasutaka IIDA, Masahiro TAKASHIMA
  • Patent number: 11855247
    Abstract: This lithium-containing transition metal composite oxide includes secondary particles that are aggregates of primary particles into or from which lithium ions are dopable or dedopable, and satisfies the following conditions: (1) the lithium-containing transition metal composite oxide is represented by Formula (I), Li[Lix(Ni(1-y-z-w)CoyMnzMw)1-x]O2??(I) (2) from X-ray photoelectron spectroscopy, a specific ? is calculated for each of the surface of the secondary particle and the inside of the secondary particle, and when the ? value of the surface of the secondary particle is referred to as ?1 and the ? value of the inside of the secondary particle is referred to as ?2, ?1 and ?2 satisfy the condition of Formula (II). 0.3??1/?2?1.
    Type: Grant
    Filed: November 30, 2018
    Date of Patent: December 26, 2023
    Assignees: SUMITOMO CHEMICAL COMPANY, LIMITED, TANAKA CHEMICAL CORPORATION
    Inventors: Takashi Arimura, Kenji Takamori, Jun-Ichi Kageura, Yuichi Sato, Yusuke Maeda
  • Publication number: 20230339775
    Abstract: A nickel-containing hydroxide capable of obtaining a positive electrode active material having excellent initial charge-discharge efficiency and a high volume capacity density. The nickel-containing hydroxide for a precursor of a positive electrode active material of a non-aqueous electrolyte secondary battery, wherein when a peak intensity of a diffraction peak appearing in the range of 2?=19.2±1 in powder X-ray diffraction measurement using CuK? rays is defined as ?, and a peak intensity of a diffraction peak appearing in the range of 2?=38.5±1 in powder X-ray diffraction measurement using CuK? rays is defined as ?, the peak intensity ratio of ?/? is 0.80 or more and 1.38 or less, and the average long diameter of primary particles is 290 nm or more and 425 nm or less.
    Type: Application
    Filed: June 29, 2023
    Publication date: October 26, 2023
    Applicant: TANAKA CHEMICAL CORPORATION
    Inventors: Yasutaka IIDA, Takaaki MASUKAWA, Kazuki KATAGIRI
  • Publication number: 20230275214
    Abstract: A nickel-containing hydroxide particle covered with cobalt capable of preventing cracks and fissures in the particle and fine powder from being generated due to having an excellent particle strength is provided. The nickel-containing hydroxide particle covered with cobalt, including a covering layer containing cobalt oxyhydroxide formed on a nickel-containing hydroxide particle, wherein an average particle strength is 65.0 MPa or more and 100.0 MPa or less for a particle diameter with a cumulative volume percentage of 50% by volume (D50) of 10.0 ?m or larger and 11.5 ?m or smaller.
    Type: Application
    Filed: May 17, 2021
    Publication date: August 31, 2023
    Applicant: TANAKA CHEMICAL CORPORATION
    Inventors: Naoya Hanamura, Naotoshi Satomi, Mikio Hata
  • Publication number: 20230219825
    Abstract: The nickel-containing hydroxide particle covered with cobalt, wherein in a volume-based particle size distribution, the nickel-containing hydroxide particle covered with cobalt has the maximum peak with a height a, one peak at a height of (½)a or higher, and has a value A of formula (1) calculated from a width b of the maximum peak at a height of (½)a, and in a volume-based particle size distribution after compression treatment, the nickel-containing hydroxide particle covered with cobalt has the maximum peak with a height c, and has a value B of formula (2) calculated from a width d of the maximum peak at a height of (½)c, and wherein the value B and the value A have a relation represented by formula (3): A=[(b×(½)a]/2??(1) B=[(d×(½)c]/2??(2) ?1.50?[(B?A)/A]×1005.
    Type: Application
    Filed: May 17, 2021
    Publication date: July 13, 2023
    Applicant: TANAKA CHEMICAL CORPORATION
    Inventors: Naoya Hanamura, Naotoshi Satomi, Mikio Hata
  • Patent number: 11557754
    Abstract: A positive electrode active material for a lithium secondary battery, comprising a lithium-containing composite metal oxide in the form of secondary particles formed by aggregation of primary particles capable of being doped and undoped with lithium ions, each of the secondary particles having on its surface a coating layer, the positive electrode active material satisfying the following requirements (1) to (3): (1) the metal oxide has an ?-NaFeO2 type crystal structure of following formula (A): Lia(NibCocM11-b-c)O2??(A) wherein 0.9?a?1.2, 0.9?b<1, 0<c?0.1, 0.9<b+c?1, and M1 represents at least one optional metal selected from Mg, Al, Ca, Sc, Ti, V, Cr, Mn, Fe, Cu, Zn, Ga, Ge, Sr, Y, Zr, Nb, Mo, Tc, Ru, Rh, Pd, Ag, Cd, In and Sn; (2) the coating layer comprises Li and M2, wherein M2 represents at least one optional metal selected from Al, Ti, Zr and W; and (3) the active material has an average secondary particle diameter of 2 to 20 ?m, a BET specific surface area of 0.1 to 2.
    Type: Grant
    Filed: January 26, 2015
    Date of Patent: January 17, 2023
    Assignees: SUMITOMO CHEMICAL COMPANY, LIMITED, TANAKA CHEMICAL CORPORATION
    Inventors: Tetsuri Nakayama, Kenji Takamori, Kyousuke Doumae, Takashi Kitamoto
  • Patent number: 11532814
    Abstract: A positive electrode active material for lithium secondary batteries includes a lithium composite metal compound containing secondary particles that are aggregates of primary particles which are capable of being doped or dedoped with lithium ions and satisfies all of specific requirements (1) to (4).
    Type: Grant
    Filed: December 21, 2017
    Date of Patent: December 20, 2022
    Assignees: SUMITOMO CHEMICAL COMPANY, LIMITED, TANAKA CHEMICAL CORPORATION
    Inventors: Kenji Takamori, Yuichiro Imanari, Yusuke Maeda
  • Patent number: 11437618
    Abstract: A positive electrode active material for lithium secondary batteries which is able to doped/undoped with lithium ions and contains at least Ni, in which a ratio P/Q (atom %/mass %) of a concentration P (atom %) of sulfur atoms being present in a surface of the positive electrode active material to a concentration Q (mass %) of sulfuric acid radicals being present in the whole positive electrode active material is more than 0.8 and less than 5.0, and the Q (mass %) is 0.01 or more and 2.0 or less.
    Type: Grant
    Filed: November 4, 2016
    Date of Patent: September 6, 2022
    Assignees: SUMITOMO CHEMICAL COMPANY, LIMITED, TANAKA CHEMICAL CORPORATION
    Inventors: Takashi Arimura, Jun-ichi Kageura, Kenji Takamori, Kimiyasu Nakao, Daisuke Yamashita, Yusuke Maeda
  • Patent number: 11417881
    Abstract: A lithium-manganese composite oxide represented by formula (1): Li1+x[(FeyNi1?y)zMn1?z]1?xO2 (1) wherein x, y, and z satisfy the following: 0<x??, 0?y<1.0, and 0<z?0.6, and wherein the content ratio of Li to the total content of Fe, Ni, and Mn (Li/(Fe+Ni+Mn)) is 1.55 or less on a molar ratio basis, the lithium-manganese composite oxide containing a crystalline phase having a layered rock-salt structure. This composite oxide is a novel material made from less resource-constrained and cheaper elements, and exhibits a high specific capacity, excellent charge-and-discharge cycle characteristics, and a high discharge capacity at a high current density (excellent rate characteristics), when used in the positive electrode material for lithium-ion secondary batteries.
    Type: Grant
    Filed: November 14, 2017
    Date of Patent: August 16, 2022
    Assignees: National Institute ot Advanced Industrial Science and Technology, Tanaka Chemical Corporation, NEC Corporation
    Inventors: Mitsuharu Tabuchi, Hideka Shibuya, Takashi Ohtomo, Noriyuki Tamura, Kaoru Narita, Ryota Yuge, Naoki Kawano
  • Patent number: 11417879
    Abstract: The present invention relates to a positive electrode active material for a lithium secondary battery, including a lithium composite metal oxide in a form of secondary particles formed by aggregation of primary particles, wherein the secondary particles have voids in interior thereof and a number of the voids with cross section thereof present per 1 ?m2 of cross section of the secondary particles is 0.3 or more and 15 or less.
    Type: Grant
    Filed: August 31, 2017
    Date of Patent: August 16, 2022
    Assignees: SUMITOMO CHEMICAL COMPANY, LIMITED, TANAKA CHEMICAL CORPORATION
    Inventors: Kenji Takamori, Takashi Arimura, Yasutaka Iida
  • Patent number: 11365130
    Abstract: The present invention provides a positive electrode active material precursor for a lithium secondary battery, in which the positive electrode active material precursor is represented by the following composition formula (I), a ratio (?/?) between a half width ? of a peak that is present within a range of a diffraction angle 2?=19.2±1° and a half width ? of a peak that is present within a range of 2?=38.5±1° is equal to or greater than 0.9 in powder X-ray diffraction measurement using a CuK? beam: NixCoyMnzMw(OH)2??(I) [0.7?x<1.0, 0<y?0.20, 0?z?0.20, 0?w?0.1, and x+y+z+w=1 are satisfied, and M is one or more selected from the group consisting of Mg, Ca, Sr, Ba, Ti, Zr, V, Nb, Cr, Mo, W, Fe, Ru, Cu, Zn, B, Al, Ga, Si, Sn, P, and Bi].
    Type: Grant
    Filed: October 31, 2017
    Date of Patent: June 21, 2022
    Assignees: SUMITOMO CHEMICAL COMPANY, LIMITED, TANAKA CHEMICAL CORPORATION
    Inventors: Yuichiro Imanari, Yusuke Maeda
  • Publication number: 20220158183
    Abstract: The nickel composite hydroxide that is a precursor of a positive electrode active material of a non-aqueous electrolyte secondary battery, comprising Ni, Co, and one or more additive metal elements M selected from the group consisting of Mn, Al, Fe, and Ti, wherein when a peak intensity of a diffraction peak appearing in a range of 2?=8.0±2.0° in powder X-ray diffraction measurement using CuK? rays is defined as ?, and a peak intensity of a diffraction peak appearing in a range of 2?=19.0±2.0° in powder X-ray diffraction measurement using CuK? rays is defined as ?, of the nickel composite hydroxide having a secondary particle diameter having a cumulative volume percentage of 90% by volume (D90) or more, a value of ?/? is 13.0 or less.
    Type: Application
    Filed: January 31, 2022
    Publication date: May 19, 2022
    Applicant: TANAKA CHEMICAL CORPORATION
    Inventors: Taiki YASUDA, Ryota KOBAYASHI
  • Publication number: 20220158184
    Abstract: The present disclosure provides a precursor of a positive electrode active material, capable of obtaining the positive electrode active material that can exhibit a high discharge capacity and high charge/discharge efficiency, by being mounted on a secondary battery using a non-aqueous electrolyte, and the positive electrode active material obtained from the precursor, as well as a method for producing the positive electrode active material. The nickel composite hydroxide particles that are precursors of a positive electrode active material of a non-aqueous electrolyte secondary battery, having a void ratio of 45.0% or more and 55.0% or less.
    Type: Application
    Filed: January 31, 2022
    Publication date: May 19, 2022
    Applicants: TANAKA CHEMICAL CORPORATION, SANYO ELECTRIC CO., LTD.
    Inventors: Taiki YASUDA, Kazuki KATAGIRI, Takaaki MASUKAWA, Masahiro TAKASHIMA, Takeshi CHIBA, Yasunobu KAWAMOTO, Takahiro SAKAMOTO, Masahiro KINOSHITA
  • Publication number: 20220144664
    Abstract: Provided is a nickel composite hydroxide that was excellent in reactivity to a lithium compound and a positive electrode active material using the nickel composite hydroxide as a precursor. The nickel composite hydroxide, having an average diameter of pores of 50 ? or larger and 60 ? or smaller in pore distribution measurement by a nitrogen adsorption method and an integrated intensity ratio of a diffraction peak appearing in a range of 2?=51.9±1.0°/a diffraction peak appearing in a range of 2?=19.1±1.0° in powder X-ray diffraction using CuK? rays of 0.40 or more and 0.50 or less.
    Type: Application
    Filed: January 21, 2022
    Publication date: May 12, 2022
    Applicant: TANAKA CHEMICAL CORPORATION
    Inventors: Naotoshi SATOMI, Yasutaka IIDA
  • Publication number: 20220140339
    Abstract: Provided is a nickel composite hydroxide capable of reducing a calcination temperature when producing a positive electrode active material, and a positive electrode active material using the nickel composite hydroxide as a precursor. The nickel composite hydroxide for a precursor of a positive electrode active material of a non-aqueous electrolyte secondary battery, wherein when in the nickel composite hydroxide, a peak intensity of a diffraction peak on a (200) plane in powder X-ray diffraction measurement using CuK? rays is defined as ?, and a peak intensity of a diffraction peak on a (013) plane in powder X-ray diffraction measurement using CuK? rays is defined as ?, a value of ?/? is 0.75 or more and 0.95 or less, and the nickel composite hydroxide comprises Ni, Co, Mn, and one or more additive elements M selected from the group consisting of Al, Fe, Ti and Zr.
    Type: Application
    Filed: January 21, 2022
    Publication date: May 5, 2022
    Applicant: TANAKA CHEMICAL CORPORATION
    Inventors: Naotoshi SATOMI, Yasutaka IIDA, Mikio HATA
  • Patent number: 11283073
    Abstract: A positive electrode active material for a lithium secondary battery includes secondary particles which are aggregates of primary particles that are capable of being doped and dedoped with lithium ions, in which the secondary particles have a total specific surface area of pores having a pore radius of 10 nm or more and 50 nm or less of 0.27 m2/g or more and 0.90 m2/g or less in a pore distribution measured by a mercury porosimetry method.
    Type: Grant
    Filed: May 28, 2018
    Date of Patent: March 22, 2022
    Assignees: SUMITOMO CHEMICAL COMPANY, LIMITED, TANAKA CHEMICAL CORPORATION
    Inventors: Jun-ichi Kageura, Yusuke Maeda
  • Publication number: 20210328216
    Abstract: A composite hydroxide in which reactivity of a lithium compound is equalized with another composite hydroxide having a large particle diameter. The composite hydroxide includes at least one metal selected from the group consisting of nickel, cobalt, and manganese, the composite hydroxide being a precursor of a positive electrode active material for a non-aqueous electrolyte secondary battery, wherein a secondary particle diameter with a cumulative volume percentage of 50% by volume (D50) is 4.0 ?m or less, tapped density (g/ml)/secondary particle diameter with cumulative volume percentage of 50% by volume (D50) (?m) is 0.60 g/ml·?m or more, and a specific surface area measured by a BET method is 15.0 m2/g or less.
    Type: Application
    Filed: July 1, 2021
    Publication date: October 21, 2021
    Applicant: TANAKA CHEMICAL CORPORATION
    Inventors: Kazuki KATAGIRI, Takaaki MASUKAWA, Masahiro TAKASHIMA
  • Patent number: 11088366
    Abstract: The present invention provides a positive electrode active material for lithium secondary batteries including: secondary particles obtained by aggregating primary particles capable of being doped and de-doped with lithium ions, in which the secondary particles have pores, and pore distribution obtained by a mercury intrusion method satisfies requirements (1) and (2) below: (1) pores that are present in any one or both of the secondary particles or spaces between the secondary particles have a pore peak within a range of a pore radius of equal to or greater than 10 nm and equal to or less than 200 nm; and (2) a total surface area of pores that have pore radii of equal to or greater than 100 nm and equal to or less than 10 ?m among the pores that are present in any one or both of the secondary particles or spaces between the secondary particles is less than 1.1 m2/g.
    Type: Grant
    Filed: October 31, 2017
    Date of Patent: August 10, 2021
    Assignees: SUMITOMO CHEMICAL COMPANY, LIMITED, TANAKA CHEMICAL CORPORATION
    Inventors: Jun-ichi Kageura, Hiroyuki Kurita, Kimiyasu Nakao, Ryota Kobayashi