Patents Assigned to Sumitomo Metal Mining Co., Ltd.
  • Publication number: 20240234710
    Abstract: The present invention provides a composite oxide that can achieve a high low-temperature output characteristic, a method for manufacturing the same, and a positive electrode active material in which the generation of soluble lithium is suppressed and a problem of gelation is not caused during the paste preparation. A positive electrode active material for non-aqueous electrolyte secondary batteries, including a lithium-metal composite oxide powder including a secondary particle configured by aggregating primary particles containing lithium, nickel, manganese, and cobalt, or a lithium-metal composite oxide powder including both the primary particles and the secondary particle, wherein the secondary particle has a hollow structure inside as a main inside structure, the slurry pH is 11.5 or less, the soluble lithium content rate is 0.5 [% by mass] or less, the specific surface area is 2.0 to 3.0 [m2/g], and the porosity is 20 to 50 [%].
    Type: Application
    Filed: March 21, 2024
    Publication date: July 11, 2024
    Applicant: SUMITOMO METAL MINING CO., LTD.
    Inventors: Hiroko Oshita, Kazuomi Ryoshi, Taira Aida, Koji Yamaji, Jiro Okada
  • Publication number: 20240228320
    Abstract: Provided is a method for separating impurities and cobalt without using an electrolysis process from a cobalt chloride solution containing impurities and producing a high purity cobalt sulfate.
    Type: Application
    Filed: January 20, 2022
    Publication date: July 11, 2024
    Applicant: SUMITOMO METAL MINING CO., LTD.
    Inventors: Hideki OHARA, Keiji KUDOU, Tatsuya HIGAKI, Hiroto WATANABE, Natsuki KONDOU, Takashi KANEKO, Shin-ichi HEGURI
  • Patent number: 12024466
    Abstract: To provide a thick film resistor paste for a resistor having a smaller resistance change rate and excellent surge resistance, a thick film resistor using the thick film resistor paste, and an electronic component provided with the thick film resistor. A thick film resistor paste comprises an organic vehicle and a conductive substance-containing glass powder comprising ruthenium oxide and lead ruthenate, the conductive substance-containing glass powder comprises 10 to 70 mass % of conductive substances, a glass composition of the conductive substance-containing glass powder comprises 3 to 30 mass % of silicon oxide. 30 to 90 mass % of lead oxide, 5 to 50 mass % of boron oxide relative to 100 mass % of glass components, and, a combined amount of silicon oxide, lead oxide and boron oxide by mass % is 50 mass % or more relative to 100 mass % of the glass components.
    Type: Grant
    Filed: April 30, 2021
    Date of Patent: July 2, 2024
    Assignee: SUMITOMO METAL MINING CO., LTD.
    Inventor: Masaki Ando
  • Patent number: 12027681
    Abstract: Provided is a more efficient dry refining process for improving the recovery rate of phosphorus-free valuable metals from waste lithium ion batteries. The present invention provides a method for recovering valuable metals from waste lithium ion batteries, said method comprises a melting step S4 for melting the waste lithium ion batteries and obtaining a molten substance and a slag separation step S5 for separating slag from the molten substance and recovering an alloy containing valuable metals, wherein in the melting step, flux containing a calcium compound is added to the waste lithium ion batteries such that the mass ratio between silicon dioxide and calcium oxide in the slag becomes 0.50 or less and the mass ratio between calcium oxide and aluminum oxide falls in the range of 0.30 to 2.00.
    Type: Grant
    Filed: July 11, 2019
    Date of Patent: July 2, 2024
    Assignee: SUMITOMO METAL MINING CO., LTD.
    Inventors: Yu Yamashita, Ryo Togashi
  • Publication number: 20240215455
    Abstract: The magnetostrictive member contains an iron-based alloy crystal having magnetostrictive characteristics and is a plate-like body having front and back faces. In one of the front and back faces, a thickness and a surface roughness Ra of the magnetostrictive member satisfy Expression (1): log Ra?0.48t?0.62. In Expression (1), log indicates a common logarithm, Ra the surface roughness (?m), and t the thickness of the magnetostrictive member (mm).
    Type: Application
    Filed: April 19, 2022
    Publication date: June 27, 2024
    Applicant: SUMITOMO METAL MINING CO., LTD.
    Inventors: Kazuhiko Okubo, Yuki Sendan, Kiyoshi Izumi
  • Patent number: 12018359
    Abstract: Purpose of the present invention is to provide a composite tungsten oxide film having a transmissivity of light with a wavelength of 700 to 1200 nm, in addition to a function to shield light by absorbing light, a function to generate heat by absorbing light and a function to release electrons by absorbing light, and also having a substantial radio wave transmissivity, and having both of an infrared light absorbing property in an infrared light region and a transparency in a visible light region, and a method for manufacturing the composite tungsten oxide film, and further, to provide a film-deposited base material or an article using any of or a plurality of the above functions. A composite tungsten oxide film comprising a composition represented by a general formula MxWyOz (wherein, an element M is one or more elements selected from alkaline metal, alkaline earth metal, Fe, In, Tl, and Sn, an element W is tungsten, and an element O is oxygen) as main components, wherein 0.001?x/y?1, 2.2?z/y?3.
    Type: Grant
    Filed: April 17, 2019
    Date of Patent: June 25, 2024
    Assignee: SUMITOMO METAL MINING CO., LTD.
    Inventors: Keiichi Sato, Isao Ando
  • Publication number: 20240204274
    Abstract: The present invention provides a method for producing a valuable metal from a starting material that contains waste lithium ion batteries, the method being capable of effectively obtaining a metal which has a reduced phosphorus content. The present invention provides a method for producing a valuable metal from a starting material that contains waste lithium ion batteries containing phosphorus, the method comprising: a melting step in which the starting material is melted, thereby obtaining a melt; and a slag separation step in which slag is separated from the melt and an alloy containing a valuable metal is recovered. According to the present invention, an alloy is recovered, while making it sure that the recovery ratio of cobalt from the starting material is from 95.0% to 99.6%, thereby suppressing the phosphorus content in the alloy to 0.1% by mass or less.
    Type: Application
    Filed: March 25, 2022
    Publication date: June 20, 2024
    Applicant: SUMITOMO METAL MINING CO., LTD.
    Inventors: Takayuki Yabe, Yu Yamashita
  • Publication number: 20240204275
    Abstract: Provided is a method for producing valuable metal from raw materials including, for example, waste lithium ion batteries by a pyrometallurgical method, said method making it possible to efficiently separate manganese included in the raw materials from metal into slag without lowering the valuable metal recovery rate. The present invention is a method for producing valuable metal from raw materials comprising: a reduction melting step for subjecting the raw materials to a reduction melting process so as to obtain a reduction product containing slag and molten metal that contains valuable metal; a slag separation step for recovering the molten metal from the reduction product; and an oxidation purification step for adding silicon dioxide (SiO2) as flux to the recovered molten metal and performing an oxidation melting process. In the oxidation purification step, SiO2 is added as the flux such that the SiO2/MnO weight ratio is 0.4-1.0 in the slag.
    Type: Application
    Filed: March 14, 2022
    Publication date: June 20, 2024
    Applicant: SUMITOMO METAL MINING CO., LTD.
    Inventors: Tomoya Hagio, Yu Yamashita
  • Publication number: 20240200873
    Abstract: The present invention provides an electric furnace including: a furnace body; and a plurality of electrodes that are provided so as to hang down into the interior of the furnace body from a top section thereof. The raw material is heated and melted in the furnace body by energizing the electrodes and a molten material consisting of a slag and a metal is generated. The electric furnace is configured so that the overall heat transfer coefficient of a side wall of the furnace body is lower than the overall heat transfer coefficient of a side wall of the furnace body, the side wall coming into contact with a layer of the metal formed in a bottom layer, the side wall coming into contact with a layer of the slag formed in a top layer, and said layers being formed in the molten material due to gravity separation.
    Type: Application
    Filed: February 27, 2024
    Publication date: June 20, 2024
    Applicant: SUMITOMO METAL MINING CO., LTD.
    Inventor: Kazunari Maeba
  • Patent number: 12015154
    Abstract: To provide a cathode active material capable of reducing cathode resistance of a secondary battery by enhancing electron conductivity thereof without reducing discharge capacity of the secondary battery. Lanthanum compound particles each having a perovskite-type structure are dispersed on surfaces of secondary particles of a lithium transition metal-containing composite oxide and/or in gaps or grain boundaries between primary particles thereof. The lanthanum compound particles have a cross-sectional average particle size of 0.70 ?m or less. The number of lanthanum compound particles present per unit area of the cross sections of the secondary particles is 0.03 particles/?m2 to 0.10 particles/?m2, and the number of lanthanum compound particles present per unit area of the surfaces of the secondary particles is 0.01 particles/?m2 to 0.25 particles/?m2. The content of lanthanum with respect to the entire cathode active material is within a range of 0.1% by mass to 5% by mass.
    Type: Grant
    Filed: July 3, 2019
    Date of Patent: June 18, 2024
    Assignees: SUMITOMO METAL MINING CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Satoshi Kanada, Tetsutaro Hayashi, Ryuta Sugiura
  • Patent number: 12009517
    Abstract: Provided are a positive electrode active material with which a nonaqueous electrolyte secondary battery having a high energy density can be obtained, a nickel-manganese composite hydroxide suitable as a precursor of the positive electrode active material, and production methods capable of easily producing these in an industrial scale. Provided is a nickel-manganese composite hydroxide represented by General Formula (1): NixMnyMz(OH)2+? and containing a secondary particle formed of a plurality of flocculated primary particles. The nickel-manganese composite hydroxide has a half width of a diffraction peak of a (001) plane obtained by X-ray diffraction measurement of at least 0.10° and up to 0.40° and has a degree of sparsity/density represented by [(void area within secondary particle/cross section of secondary particle)×100](%) of at least 0.5% and up to 10%. Also provided is a production method of the nickel-manganese composite hydroxide.
    Type: Grant
    Filed: April 13, 2023
    Date of Patent: June 11, 2024
    Assignee: SUMITOMO METAL MINING CO., LTD.
    Inventors: Haruki Kaneda, Yuki Koshika, Takaaki Ando
  • Patent number: 12009506
    Abstract: The present disclosure can bring excellent output characteristics to a nonaqueous electrolyte secondary battery that uses a cathode active material containing tungsten while desired durability is secured. The battery of the present disclosure includes a cathode, an anode, and a nonaqueous electrolyte. The cathode includes a cathode active material layer that contains a granular cathode active material. The cathode active material includes a core part that contains a lithium-transition metal composite oxide of a layered structure; a tungsten-concentrated layer that is formed over a surface of the core part and has a higher tungsten concentration than in the core part; and a lithium-tungsten compound particle that adheres to at least part of a surface of the tungsten-concentrated layer and contains tungsten and lithium. In the battery of the present disclosure, the tungsten-concentrated layer has an amorphous structure. This can bring excellent output characteristics while desired durability is secured.
    Type: Grant
    Filed: July 16, 2020
    Date of Patent: June 11, 2024
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA AND, SUMITOMO METAL MINING CO., LTD.
    Inventors: Yuji Yamamoto, Momoko Procter, Yoshinari Makimura, Tetsutaro Hayashi, Willy Shun Kai Bong
  • Patent number: 12006566
    Abstract: A composite tungsten oxide film having high film smoothness, with a function to shield infrared light by reflecting infrared light by a thermal insulation, while maintaining transparency in a visible light region, and a method for manufacturing the composite tungsten oxide film, and a film-deposited base material or an article using these functions. A composite tungsten oxide film including a composition with a general formula MxWyOz as main components, wherein 0.001?x/y?1, 2.2?z/y?3.0, organic components are not contained substantially, a transmittance in a wavelength of 550 nm is 50% or more, a transmittance in a wavelength of 1400 nm is 30% or less, and also, a reflectance in a wavelength of 1400 nm is 35% or more.
    Type: Grant
    Filed: June 6, 2019
    Date of Patent: June 11, 2024
    Assignee: SUMITOMO METAL MINING CO., LTD.
    Inventors: Keiichi Sato, Isao Ando
  • Publication number: 20240186505
    Abstract: Provided is a nickel-containing composite hydroxide that is a precursor of a positive-electrode active material with which a nonaqueous-electrolyte secondary battery having a low irreversible capacity and a high energy density can be configured. An aqueous alkaline aqueous solution and a complexing agent are added to an mixed aqueous solution including at least nickel and cobalt to regulate the pH (measured at a reference liquid temperature of 25° C.) of this mixed aqueous solution to 11.0 to 13.0, the ammonium concentration to 4 to 15 g/L, and the reaction temperature to 20° C. to 45° C. Using stirring blades having an inclination angle of 20° to 60° with respect to a horizontal plane, the mixture is stirred to conduct a crystallization reaction under such conditions that when the nickel-containing composite hydroxide to be obtained is roasted in air at 800° C. for 2 hours, the roasted composite hydroxide has a BET value of 12 to 50 m2/g.
    Type: Application
    Filed: January 2, 2024
    Publication date: June 6, 2024
    Applicant: SUMITOMO METAL MINING CO., LTD.
    Inventors: Kazuomi RYOSHI, Kensaku MORI, Katsuya KASE, Yasutaka KAMATA
  • Patent number: 12000018
    Abstract: Provided is a method for separating copper from nickel and cobalt with which it is possible to selectively and efficiently separate copper, as well as nickel and cobalt, from an alloy including copper, nickel, and cobalt such as an alloy having high corrosion resistance that includes copper, nickel, and cobalt obtained by dry treatment of waste lithium ion cells. An alloy including copper, nickel, and cobalt is brought into contact with sulfuric acid in the joint presence of a sulfurizing agent, and a solid containing copper and a leachate containing nickel and cobalt are obtained.
    Type: Grant
    Filed: September 11, 2018
    Date of Patent: June 4, 2024
    Assignee: SUMITOMO METAL MINING CO., LTD.
    Inventors: Tatsuya Higaki, Hiroshi Takenouchi, Hiroshi Kobayashi, Satoshi Asano
  • Patent number: 11996556
    Abstract: An object is to provide a positive electrode active material for a non-aqueous electrolyte secondary battery that can suppress gelation of a positive electrode mixture paste and can improve stability when a non-aqueous electrolyte secondary battery is manufactured. A positive electrode active material for a non-aqueous electrolyte secondary battery has a hexagonal layered crystal structure, is represented by general formula (1): Li1+sNixCoyMnzMwBtO2+?, and includes a lithium-metal composite oxide containing a secondary particle with a plurality of aggregated primary particles and a lithium-boron compound present on at least a part of surfaces of the primary particles. The amount of lithium hydroxide that elutes when the positive electrode active material is dispersed in water, measured by a neutralization titration method, is 0.01% by mass or more and 0.5% by mass or less with respect to the entire positive electrode active material.
    Type: Grant
    Filed: August 23, 2018
    Date of Patent: May 28, 2024
    Assignee: SUMITOMO METAL MINING CO., LTD.
    Inventors: Hiroko Oshita, Motoaki Saruwatari, Kazuomi Ryoshi
  • Publication number: 20240166555
    Abstract: Provided is an optical film (a composite tungsten oxide film containing cesium, tungsten, and oxygen), a sputtering target, and a method of producing a film by which film formation conditions can be easily obtained. An optical film of the present invention has transmissivity in a visible wavelength band, has absorbance in a near-infrared wavelength band, and has radio wave transparency, and is characterized in that the optical film comprises cesium, tungsten, and oxygen, in which a refractive index n and an extinction coefficient k of the optical film at each of 300 nm and wavelengths [400 nm, 600 nm, . . . , 2400 nm] specified at 200 nm intervals in a wavelength region from 400 nm to 2400 nm are set within a range between “n-max” and “n-min” made by graphing the maximum value and the minimum value of the refractive index in a wavelength dispersion graph of optical constants shown in FIG.
    Type: Application
    Filed: June 24, 2020
    Publication date: May 23, 2024
    Applicant: SUMITOMO METAL MINING CO., LTD.
    Inventor: Hideharu OKAMI
  • Patent number: 11990259
    Abstract: A rare earth-iron-nitrogen-based magnetic powder according to this invention contains, as main constituent components, a rare-earth element (R), iron (Fe), and nitrogen (N). Moreover, this magnetic powder has an average particle size of 1.0-10.0 ?m, and contains 22.0-30.0 mass % of a rare-earth element (R) and 2.5-4.0 mass % of nitrogen (N). Further, this magnetic powder includes: a core part having any one crystal structure among a Th2Zn17 type, a Th2Ni17 type, and a TbCu7 type; and a shell layer provided on the surface of the core part and having a thickness of 1-30 nm. The shell layer contains a rare-earth element (R) and iron (Fe) so that the R/Fe atomic ratio is 0.3-5.0, and further contains 0-10 at % (exclusive of 0) of nitrogen (N). Furthermore, this magnetic powder contains compound particles composed of a rare-earth element (R) and phosphorus (P).
    Type: Grant
    Filed: March 31, 2021
    Date of Patent: May 21, 2024
    Assignees: TOHOKU UNIVERSITY, SUMITOMO METAL MINING CO., LTD.
    Inventors: Satoshi Sugimoto, Masashi Matsuura, Takashi Ishikawa, Yukinobu Yoneyama
  • Patent number: 11987520
    Abstract: A surface-treated infrared absorbing fine particle dispersion liquid wherein surface-treated infrared absorbing fine particles are dispersed in a liquid medium, and are an infrared absorbing transparent substrate having a coating layer in which the surface-treated infrared absorbing fine particles.
    Type: Grant
    Filed: April 18, 2019
    Date of Patent: May 21, 2024
    Assignee: SUMITOMO METAL MINING CO., LTD.
    Inventors: Hirofumi Tsunematsu, Takeshi Chonan
  • Patent number: 11990618
    Abstract: A positive electrode active material containing a lithium metal composite oxide composed of secondary particles formed by aggregated primary particles, comprising lithium, at least one metal element and at least one additive element, the lithium metal composite oxide having a crystal structure of layered rock salt structure and the metal element including nickel in a content of 60 to 90 atomic percent and the additive element including boron in content of more than 1.0 atomic percent and 6.0 atomic percent or less, the nickel content and the boron content each with respect to the sum of the metal element and the additive element, the porosity of the secondary particles being 8% or more and 20% or less; a non-aqueous electrolyte secondary battery containing the positive electrode active material; and a process for producing the positive electrode active material.
    Type: Grant
    Filed: November 1, 2021
    Date of Patent: May 21, 2024
    Assignee: SUMITOMO METAL MINING CO., LTD.
    Inventors: Jun Suzuki, Koji Yamaji