Patents Assigned to Sumitomo Metal Mining Co., Ltd.
  • Publication number: 20210047518
    Abstract: Surface-treated infrared-absorbing fine particles with excellent moisture and heat resistance and excellent infrared-absorbing properties, surface-treated infrared absorbing fine particle powder containing the surface-treated infrared absorbing fine particles, an infrared absorbing fine particle dispersion liquid and an infrared absorbing fine particle dispersion body using the surface-treated infrared absorbing fine particles, and a method for producing them, wherein a surface of infrared absorbing particles is coated with a coating layer containing at least one selected from hydrolysis product of a metal chelate compound, polymer of hydrolysis product of a metal chelate compound, hydrolysis product of a metal cyclic oligomer compound, and polymer of hydrolysis product of a metal cyclic oligomer compound.
    Type: Application
    Filed: November 13, 2018
    Publication date: February 18, 2021
    Applicant: SUMITOMO METAL MINING CO., LTD.
    Inventors: Hirofumi TSUNEMATSU, Takeshi CHONAN, Hideaki FUKUYAMA
  • Publication number: 20210039011
    Abstract: Provided is a solvent extraction method that allows selectively separating magnesium from an acidic aqueous solution of sulfuric acid. The solvent extraction method includes: bringing an acidic aqueous solution of sulfuric acid containing nickel, cobalt, and magnesium in contact with an organic solvent to extract the magnesium into the organic solvent; and using the organic solvent produced by diluting an extractant made of alkylphosphonic acid ester with a diluent. A concentration of the extractant is set to 40 volume % or more and 60 volume % or less and a pH of the acidic aqueous solution of sulfuric acid is set to 1.5 or more and 2.0 or less, or the concentration of the extractant is set to 20 volume % or more and 50 volume % or less and the pH of the acidic aqueous solution of sulfuric acid is set to 2.0 or more and 2.5 or less.
    Type: Application
    Filed: November 21, 2018
    Publication date: February 11, 2021
    Applicant: SUMITOMO METAL MINING CO., LTD.
    Inventors: Hideki OHARA, Satoshi ASANO, Hiroshi KOBAYASHI, Masatoshi TAKANO, Shota SANJO
  • Publication number: 20210020901
    Abstract: Provided is a nonaqueous electrolyte secondary battery with a positive electrode active material that contains an excess of Li and has a layered structure, the nonaqueous electrolyte secondary battery having a high output and enabling prevention of gelation of the positive electrode active material layer-forming paste during production. The herein disclosed nonaqueous electrolyte secondary battery includes a positive electrode, a negative electrode, and a nonaqueous electrolyte. The positive electrode includes a positive electrode active material layer. The positive electrode active material layer contains a lithium composite oxide having a layered structure as a positive electrode active material. The compositional ratio of the lithium atom to the metal atom other than a lithium atom contained in the lithium composite oxide is greater than 1. The lithium composite oxide is in the form of porous particles.
    Type: Application
    Filed: July 15, 2020
    Publication date: January 21, 2021
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, SUMITOMO METAL MINING CO., LTD.
    Inventors: Yuji Yamamoto, Momoko Procter, Yoshinari Makimura, Tetsutaro Hayashi, Willy Shun Kai Bong
  • Publication number: 20210020924
    Abstract: A nonaqueous electrolyte secondary battery uses, as a positive electrode active material, a lithium composite oxide having a layered structure and coated with lithium tungstate, and has a low resistance. The nonaqueous electrolyte secondary battery includes positive and negative electrodes and a nonaqueous electrolyte. The positive electrode includes a positive electrode active material layer containing a lithium composite oxide having a layered structure as a positive electrode active material. The lithium composite oxide is in the form of porous particles, each having at least two voids each having a percentage of a void area with respect to the area occupied by each of the particles in its cross-sectional view of at least 1%. Each porous particle has a void connecting the particle interior to the surface and having an opening with a diameter of at least 100 nm. Each porous particle has a lithium tungstate coating on its surface.
    Type: Application
    Filed: July 10, 2020
    Publication date: January 21, 2021
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, SUMITOMO METAL MINING CO., LTD.
    Inventors: Yuji YAMAMOTO, Momoko PROCTER, Yoshinari MAKIMURA, Tetsutaro HAYASHI, Willy Shun Kai BONG
  • Publication number: 20210020923
    Abstract: A non-aqueous electrolyte secondary battery is obtained using a lithium composite oxide having a layered structure in a positive electrode active substance. An increase in resistance following repeated charging and discharging is suppressed. The battery includes a positive electrode provided with a positive electrode active substance layer, a negative electrode and a non-aqueous electrolyte. The positive electrode active substance layer contains a porous particle lithium composite oxide having a layered structure. The average void ratio of the porous particle is not less than 12% but not more than 50%, and it contains two or more voids having diameters that are at least 8% of its particle diameter. The surface of the porous particle is provided with a coating of lithium tungstate. The coverage ratio of the surface of the porous particle by the lithium tungstate is not less than 10% but not more than 65%.
    Type: Application
    Filed: July 10, 2020
    Publication date: January 21, 2021
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, Sumitomo Metal Mining Co., Ltd.
    Inventors: Yuji YAMAMOTO, Momoko PROCTER, Yoshinari MAKIMURA, Tetsutaro HAYASHI, Willy Shun Kai Bong
  • Publication number: 20210020925
    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: Application
    Filed: July 16, 2020
    Publication date: January 21, 2021
    Applicants: Toyota Jidosha Kabushiki Kaisha, Sumitomo Metal Mining Co., Ltd.
    Inventors: Yuji Yamamoto, Momoko Procter, Yoshinari Makimura, Tetsutaro Hayashi, Willy Shun Kai Bong
  • Publication number: 20210020900
    Abstract: A non-aqueous electrolyte secondary battery that has a low initial resistance and an increase in resistance after charging and discharging is suppressed. The secondary battery includes a positive electrode, a negative electrode, and a non-aqueous electrolyte. The positive electrode includes a positive electrode active substance layer, which contains a lithium composite oxide having a layered structure. The lithium composite oxide is a porous particle. A surface of the porous particle includes a layer having a rock salt type structure. A thickness of the layer is not less than 5 nm and not more than 80 nm. A void ratio of the porous particle is not less than 15% and not more than 48%. The porous particle contains two or more voids having diameters that are at least 10% of the particle diameter of the porous particle. The surface of the porous particle includes a coating of lithium tungstate.
    Type: Application
    Filed: July 10, 2020
    Publication date: January 21, 2021
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, SUMITOMO METAL MINING CO., LTD.
    Inventors: Yuji YAMAMOTO, Momoko PROCTER, Yoshinari MAKIMURA, Tetsutaro HAYASHI, Willy Shun Kai Bong
  • Publication number: 20210020922
    Abstract: A non-aqueous electrolyte secondary battery which is obtained using a lithium composite oxide having a layered structure and coated with a tungsten-containing compound in a positive electrode active substance, and which has a low initial resistance, and in which an increase in resistance following repeated charging and discharging is suppressed. The non-aqueous electrolyte secondary battery includes a positive electrode, a negative electrode and a non-aqueous electrolyte. The positive electrode includes a positive electrode active substance layer containing a lithium composite oxide having a layered structure. The lithium composite oxide includes a porous particle having a void ratio of not less than 20% but not more than 50%. The porous particle contains two or more voids having diameters that are at least 10% of the particle diameter of the porous particle. The surface of the porous particle is provided with a coating containing tungsten oxide and lithium tungstate.
    Type: Application
    Filed: July 10, 2020
    Publication date: January 21, 2021
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, Sumitomo Metal Mining Co., Ltd.
    Inventors: Yuji YAMAMOTO, Momoko PROCTER, Yoshinari MAKIMURA, Tetsutaro HAYASHI, Willy Shun Kai Bong
  • Publication number: 20210013509
    Abstract: A positive electrode active material for non-aqueous electrolyte secondary batteries includes a lithium-nickel composite oxide particle and a coating layer attached to at least a part of a surface of the particle. The lithium-nickel composite oxide particle contains boron therein, and the coating layer contains a titanium compound.
    Type: Application
    Filed: March 20, 2019
    Publication date: January 14, 2021
    Applicant: SUMITOMO METAL MINING CO., LTD.
    Inventors: Yoshihiro Otsuka, Kazuomi Ryoshi, Hiroko Oshita, Shuuzou Ozawa
  • Publication number: 20210010917
    Abstract: An air bubble measurement device is a device that measures the air bubbles moving in the liquid. The air bubble measurement device includes a measurement chamber that holds a liquid. The measurement chamber includes an introduction port to introduce the air bubbles in the liquid from a lower side and a transparent inclined surface that faces obliquely downward and is disposed at a position to which the air bubbles present inside the liquid move up. The transparent inclined surface includes a hydrophilic membrane. The hydrophilic membrane has a contact angle with water of 20 degrees or less. This structural arrangement allows for reducing an attachment of the air bubbles on the transparent inclined surface even when the air bubbles become small. This allows for reducing stay of the air bubbles on the transparent inclined surface and allows for accurately measuring the states of the air bubbles (that is, the size and quantity of the air bubbles).
    Type: Application
    Filed: September 28, 2020
    Publication date: January 14, 2021
    Applicant: SUMITOMO METAL MINING CO., LTD.
    Inventor: Shintaro ISHIKAWA
  • Publication number: 20200411858
    Abstract: A metal composite hydroxide represented by a general formula (1): Ni1?x?yCoxMnyMz(OH)2+? (where 0.02?x?0.3, 0.02?y?0.3, 0?z?0.05, and ?0.5???0.5 are satisfied and M is at least one element selected from the group consisting of Mg, Ca, Al, Si, Fe, Cr, V, Mo, W, Nb, Ti, and Zr), in which the metal composite hydroxide contains a first particle having a core portion inside the particle and a shell portion formed around the core portion and [(D90?D10)/MV] is less than 0.80.
    Type: Application
    Filed: February 20, 2019
    Publication date: December 31, 2020
    Applicant: SUMITOMO METAL MINING CO., LTD.
    Inventors: Takahiro Toma, Haruki Kaneda, Yuki Koshika
  • Patent number: 10875278
    Abstract: A heat ray shielding film is disclosed, including composite tungsten oxide particles; and an ionomer resin. The composite tungsten oxide particles are expressed by a general formula MxWOy (where M denotes one or more kinds of elements selected from Cs, Rb, K, Tl, In, Ba, Li, Ca, Sr, Fe, Sn, Al, Cu, and Na, and 0.1?x?0.5 and 2.2?y?3.0).
    Type: Grant
    Filed: June 30, 2015
    Date of Patent: December 29, 2020
    Assignee: SUMITOMO METAL MINING CO., LTD.
    Inventors: Keisuke Machida, Hiroki Nakayama, Kenichi Fujita
  • Publication number: 20200399438
    Abstract: A dispersion body having excellent heat ray shielding properties and long-term high temperature stability, and a dispersion liquid for producing the dispersion body, wherein the dispersion liquid contains liquid medium, absorbing fine particles dispersed in the medium, and a phosphite ester compound, the absorbing fine particles are one or more kinds of oxide fine particles selected from tungsten oxide fine particles represented by a general formula WyOz, and the phosphite ester compound is a phosphite ester compound represented by the following predetermined structural formula, and an addition amount of the phosphite ester compound is more than 500 parts by mass and 50000 parts by mass or less with respect to 100 parts by mass of the absorbing fine particles.
    Type: Application
    Filed: November 13, 2018
    Publication date: December 24, 2020
    Applicant: SUMITOMO METAL MINING CO., LTD.
    Inventors: Hirofumi TSUNEMATSU, Takeshi CHONAN, Takahisa KAWANO
  • Publication number: 20200391177
    Abstract: A method for producing lithium manganese oxide that is a precursor of a lithium adsorbent under atmospheric pressure is provided. The method for producing a precursor of a lithium adsorbent comprises tire following steps (1) to (3): (1) A 1st mixing step of mixing a manganese salt and alkali hydroxide, so as to obtain a 1st slurry containing manganese hydroxide; (2) a 2nd mixing step of adding lithium hydroxide to the 1st slurry and then mixing the mixture to obtain a 2nd slurry; and (3) an oxidation step of adding an oxidizing agent to the 2nd slurry, so as to obtain a precursor of a lithium adsorbent. The method for producing a precursor of a lithium adsorbent comprises these steps, so that a precursor of a lithium adsorbent can be produced under atmospheric pressure. Therefore, a precursor of a lithium adsorbent can be produced at a limited cost.
    Type: Application
    Filed: April 17, 2019
    Publication date: December 17, 2020
    Applicants: SUMITOMO METAL MINING CO., LTD., THE UNIVERSITY OF KITAKYUSHU
    Inventors: Masatoshi TAKANO, Shin-ya MATSUMOTO, Osamu IKEDA, Yohei KUDO, Satoshi ASANO, Kazuharu YOSHIZUKA, Syouhei NISHIHAMA
  • Publication number: 20200388841
    Abstract: A positive electrode active material for a nonaqueous electrolyte secondary battery is disclosed which contains a lithium-nickel-manganese composite oxide containing a secondary particle formed of a plurality of flocculated primary particles and a lithium-niobium compound. The positive electrode active material is represented by General Formula (1): LidNi1-a-b-cMnaMbNbcO2+? (M is at least one element selected from Co, W, Mo, V, Mg, Ca, Al, Ti, Cr, Zr, and Ta; and 0.03?a?0.60, 0?b?0.60, 0.02?c?0.08, a+b+c<1, 0.95?d?1.20, and 0???0.5, the lithium-nickel-manganese composite oxide has a (003)-plane crystallite diameter of at least 50 nm and up to 130 nm, the lithium-niobium compound is present on surfaces of the primary particles, and part of niobium in the positive electrode active material is solid-solved in the primary particles.
    Type: Application
    Filed: December 25, 2017
    Publication date: December 10, 2020
    Applicant: SUMITOMO METAL MINING CO., LTD.
    Inventors: Haruki Kaneda, Yuki Koshika, Takuma Nakamura
  • Publication number: 20200384542
    Abstract: Provided is a nickel powder manufacturing method capable of efficiently manufacturing a high-quality nickel powder using as little ammonium gas or ammonium water as possible. The nickel powder manufacturing method according to the present invention is characterized by comprising: a first step for generating a post-neutralization slurry including nickel hydroxide by mixing a nickel sulfate aqueous solution and a neutralizing agent; a second step for causing a complex-forming reaction by mixing an ammonium sulfate aqueous solution with the post-neutralization slurry and obtaining a post-complexation slurry including a nickel ammine complex aqueous solution; and a reducing step for obtaining a nickel powder and a post-reduction solution by contacting hydrogen gas with the nickel ammine complex aqueous solution. Further, it is preferable that a post-complexation solution obtained in the reduction step be repeatedly used as the ammonium sulfate aqueous solution to be added to the post-neutralization slurry.
    Type: Application
    Filed: September 4, 2017
    Publication date: December 10, 2020
    Applicant: Sumitomo Metal Mining Co., Ltd.
    Inventors: Kazuyuki TAKAISHI, Yoshitomo OZAKI, Shin-ichi HEGURI, Ryo-ma YAMAGUMA, Yasuo DOI
  • Patent number: 10858265
    Abstract: Provided is a cathode active material for a non-aqueous electrolyte secondary battery that improves the cycling characteristic and high-temperature storability without impairing the charge/discharge capacity and the output characteristics. A nickel cobalt containing composite hydroxide is obtained by using a batch type crystallization method in which a raw material aqueous solution that includes Ni, Co and Mg is supplied in an inert atmosphere to a reaction aqueous solution that is controlled so that the temperature is within the range 45° C. to 55° C., the pH value is within the range 10.8 to 11.8 at a reference liquid temperature of 25° C., and the ammonium-ion concentration is within the range 8 g/L to 12 g/L. An Al-coated composite hydroxide that is expressed by the general formula: Ni1-x-y-zCoxAlyMgz(OH)2 (where, 0.05?x?0.20, 0.01?y?0.06, and 0.01?z?0.
    Type: Grant
    Filed: April 27, 2016
    Date of Patent: December 8, 2020
    Assignee: SUMITOMO METAL MINING CO., LTD.
    Inventors: Takehide Honma, Koji Yamaji, Ryozo Ushio
  • Publication number: 20200381729
    Abstract: Provided is a precursor of a positive electrode active material for non-aqueous electrolyte secondary batteries which allows a non-aqueous electrolyte secondary battery to have excellent battery characteristics. A manganese composite hydroxide is obtained by adjusting the pH value of an aqueous solution for nucleation containing cobalt and/or manganese to 7.5 to 11.1 on the basis of a liquid temperature of 25° C. to form plate-shaped crystal nuclei, and adjusting the pH value of a slurry for particle growth containing the plate-shaped crystal nuclei to 10.5 to 12.5 on the basis of a liquid temperature of 25° C., and supplying a mixed aqueous solution including a metal compound containing at least manganese to the slurry, thereby performing particle growth of the plate-shaped crystal nuclei.
    Type: Application
    Filed: August 19, 2020
    Publication date: December 3, 2020
    Applicant: SUMITOMO METAL MINING CO., LTD.
    Inventors: Kazuomi RYOSHI, Kensaku MORI
  • Publication number: 20200379146
    Abstract: A light to heat conversion layer which has visible light permeability, excellent near infrared absorption characteristics, and which can improve the transfer accuracy of an organic electroluminescent element using laser irradiation; and a donor sheet using the light to heat conversion layer. The light to heat conversion layer contains near infrared absorption particles and a binder component. The near infrared absorption particles are composite tungsten oxide microparticles wherein if the value for the XRD peak intensity of the face of a silicon powder standard sample (manufactured by NIST, 640c) is defined as 1, the value for the ratio of XRD peak top intensity is at least 0.13, and the light transmissivity is at least 45%.
    Type: Application
    Filed: June 19, 2018
    Publication date: December 3, 2020
    Applicant: SUMITOMO METAL MINING CO., LTD.
    Inventors: Takeshi CHONAN, Hirofumi TSUNEMATSU
  • Patent number: 10850330
    Abstract: A process for producing nickel powder capable of obtaining inexpensive, and also, high-performance nickel powder, even when using wet process. A process for producing nickel powder, including a crystallization step for obtaining nickel crystal powder by reductive reaction in reaction solution in which at least water-soluble nickel salt, metal salt of metal more noble than nickel, reducing agent, alkali hydroxide, amine compound, and water are mixed, wherein the reducing agent to be mixed in the crystallization step is hydrazine, the amine compound is autolysis inhibitor of hydrazine, and contains two or more primary amino groups in molecule, or contains one primary amino group and one or more secondary amino groups in molecule, and ratio of molar number of the amine compound with respect to molar number of nickel in the reaction solution is in a range of 0.01 mol % to 5 mol %.
    Type: Grant
    Filed: October 14, 2016
    Date of Patent: December 1, 2020
    Assignee: SUMITOMO METAL MINING CO., LTD.
    Inventors: Junji Ishii, Hiroyuki Tanaka, Shingo Murakami, Yuki Kumagai, Masaya Yukinobu, Yoshiaki Matsumura