Sumitomo Metal Mining Patente

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An object to be solved by the invention is to provide an infrared-absorbing fiber containing complex tungsten oxide particles having excellent infrared absorbing performance. The infrared-absorbing fiber of the present invention includes: a fiber; and complex tungsten oxide particles located at one or more locations selected from an interior of the fiber and a surface of the fiber. The complex tungsten oxide particles contain a complex tungsten oxide. The complex tungsten oxide is represented by a general formula M_xW_yO_z (0.20≤ x/y≤0.37, and 2.2≤z/y≤3.3). The complex tungsten oxide has a hexagonal crystal system. In a STEM-HAADF image of the complex tungsten oxide particles with a beam incident along with , the complex tungsten oxide particles contain 0.01% or greater and 10% or less by number of spots, in which Z-contrast of tungsten atom decreases to equal to or less than 95% of an average value.

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Infrared-absorbing particles including complex tungsten oxide particles and Group 5 element complex oxide particles.

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A master batch used for manufacturing a near-infrared shielding transparent resin molded body contains: a polymeric dispersant containing at least an amine functional group; a solid medium containing a maleic anhydride-modified polyolefin polymer or copolymer; and complex tungsten oxide particles located in the solid medium, having a hexagonal crystal structure, and represented by a general formula M<x>WO<y> (where 0.1≤x≤1.0 and 2.0≤y<4.0).

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An object is to provide a positive electrode active material having a high discharge capacity in an all-solid-state lithium ion secondary battery. The positive electrode active material for an all-solid-state lithium ion secondary battery includes a lithium-transition metal composite oxide including a secondary particle including a plurality of primary particles being aggregated and includes a coating layer coating a surface of the secondary particle, the lithium-transition metal composite oxide contains lithium and nickel and optionally contains cobalt and an element M being an additive element other than lithium, nickel, cobalt, and oxygen, the coating layer contains a compound containing at least lithium and tungsten, the surface of the secondary particle is coated with tungsten at a percentage of coverage of 30% or more and 95% or less, and the percentage of coverage is represented by P (%) and calculated using XPS analysis with (Formula 1) described below. P = W / W + Ni + Co + M × 100 % <img class="EMIRef" id="b135da82-c72c-40b0-9174-e846127c910a-ia01" />

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A positive electrode active material for lithium ion secondary batteries containing secondary particles in which a plurality of primary particles are mutually agglomerated contains: a lithium transition metal complex oxide having a layered rock salt-type structure; and crystallized lithium phosphate. In a crystal structure analysis of the lithium transition metal complex oxide having the layered rock salt-type structure by neutron diffraction, a ratio by which an element other than lithium occupies a lithium site (3b site) is 3% or greater and 8% or less.

A positive electrode active material for a lithium-ion secondary battery contains a lithium nickel complex oxide having a hexagonal crystalline layered structure. The lithium nickel complex oxide has a ratio by mole of Li:Ni:M=a:b:c (where 0.90≤a<1.00, 0.80≤b<1.00, 0.00<c≤0.20, b+c=1, and element M is at least one element selected from the group consisting of Mn, Co, Al, Ti, Zr, W, Fe, Si, Nb, Mg, Ca, B, Na, K, Mo, Cu, V, P, and Ba). An occupancy of nickel existing in a lithium site obtained from a powder neutron diffraction pattern is 2.5% or more and 10.0% or less. A half width of a diffraction peak on a (003) plane in a powder X-ray diffraction pattern is 0.054° or more and less than 0.074°.

Provided is a method for smelting a nickel-containing oxide ore with which the amount of CO2 generated is reduced and the nickel recovery rate is high. The present invention is a method for smelting a nickel-containing oxide ore, the method comprising: a step for using a tubular reaction vessel, introducing a raw material that contains a nickel-containing oxide ore so as to move from above to below within the reaction vessel, and supplying a hydrogen-containing gas as a reducing agent to the raw material from below and from the side to perform a reduction treatment; a step for performing a melting treatment on the reduction product obtained using the reduction treatment; and a step for separating the slag from the melt obtained using the melting treatment and recovering a nickel-containing metal. The gas supplied from below to the raw material is supplied at room temperature. The gas supplied from the side to the raw material is at a temperature of 300C or higher and is supplied from the side at a position above the position where the raw material for which the reduction treatment has been completed is stored.

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A positive electrode active material for a lithium-ion secondary battery contains a lithium nickel complex oxide having a hexagonal crystalline layered structure. The lithium nickel complex oxide has a ratio by mole of Li:Ni:M=a:b:c (where 0.90≤a<1.00, 0.80≤b<1.00, 0.00<c≤0.20, b+c=1, and element M is at least one element selected from the group consisting of Mn, Co, Al, Ti, Zr, W, Fe, Si, Nb, Mg, Ca, B, Na, K, Mo, Cu, V, P, and Ba). An occupancy of nickel existing in a lithium site obtained from a powder neutron diffraction pattern is 2.5% or more and 10.0% or less.

A positive electrode active material for a lithium-ion secondary battery containing secondary particles in which a plurality of primary particles are aggregated with each other contains a lithium-transition metal complex oxide having a layered rock-salt type structure. In a crystal structure of the lithium-transition metal complex oxide, a percentage of an element other than Li occupying an Li site (3b site) is 2% or more and 8% or less. A composition of the lithium-transition metal complex oxide is represented by general formula (1) below: General formula (1): Li<1-x>NiO<2+α> (where 0.02≤x≤0.08 and -0.1≤α≤0.1).

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A coated positive electrode active material for lithium secondary batteries is provided for sulfide-based all-solid-state secondary batteries. The coating positive electrode active material includes a positive electrode active material and a coating film. The positive electrode active material includes nickel, manganese, and cobalt. The coating film is disposed on a surface of the positive electrode active material and includes fluoride and a phosphorus-containing compound.

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