公开(公告)号：US10553870B2

公开(公告)日：2020-02-04

申请号：US15764453

申请日：2016-09-27

Applicant: SUMITOMO METAL MINING CO., LTD.

Inventor： Haruki Kaneda ,  Takaaki Ando ,  Ryozo Ushio

IPC: H01M4/00 ,  H01B1/06 ,  H01M4/525 ,  H01M4/505 ,  C01G53/00 ,  H01M10/0525 ,  H01M4/02

Abstract: The present invention industrially provides: a non-aqueous electrolyte secondary battery having a high energy density and high cycling characteristics; a cathode active material for a non-aqueous electrolyte secondary battery having a high packing efficiency; and a nickel manganese containing composite hydroxide having a small particle size, a narrow particle size distribution, and a high sphericity. When producing the nickel manganese containing composite hydroxide by a crystallization reaction using material solution where metal compounds including nickel and manganese dissolve, a nucleation process is performed in a non-oxidizing atmosphere by stirring an aqueous solution for nucleation, that includes the quantity of the material solution corresponding to 0.6% to 5.0% of the whole amount of substance of metal element included in a metal compound used for the overall crystallization reaction.

公开(公告)号：US10236507B2

公开(公告)日：2019-03-19

申请号：US15115375

申请日：2015-01-29

Applicant: SUMITOMO METAL MINING CO., LTD.

Inventor： Koji Yamaji ,  Takehide Honma ,  Ryozo Ushio

IPC: H01M4/525 ,  C01G53/00 ,  H01M4/505 ,  H01M4/04 ,  H01M10/0525 ,  H01M4/02

Abstract: The object of the present invention is to improve the roundness of nickel-manganese composite hydroxide particles obtained by a crystallization process, and to improve the filling characteristic of cathode active material produced using the nickel-manganese composite hydroxide particles as a precursor. A reaction aqueous solution is formed by supplying a raw material aqueous solution including at least Ni and Mn, an aqueous solution including an ammonium-ion donor, and an alkali solution into a reaction tank, and mixing, then nickel-manganese composite hydroxide particles are crystallized. When doing this, the oxygen concentration inside the reaction tank is controlled to be 3.0% by volume or greater, the temperature of the reaction aqueous solution is controlled to be 35° C. to 60° C., and the nickel-ion concentration is controlled to be 1,000 mg/L or greater. As a result, nickel-manganese composite hydroxide particles are obtained that include secondary particles formed by an aggregation of plural primary particles and expressed by the general formula: NixMnyMt(OH)2+α (where 0.05≤x≤0.95, 0.05≤y≤0.95, 0≤t≤0.20, x+y+t=1, 0≤α≤0.5, and M is one or more elements selected from among Co, Ti, V, Cr, Zr, Nb, Mo, Hf, Ta and W); and the average value of the roundness of cathode active material having a particle size that is 70% the average particle size or more is 0.82 or greater, and the tap density is 2.20 g/cm3 or greater.

公开(公告)号：US20190036112A1

公开(公告)日：2019-01-31

申请号：US15771427

申请日：2016-09-30

Applicant: SUMITOMO METAL MINING CO., LTD.

Inventor： Taira Aida ,  Jiro Okada ,  Tetsufumi Komukai ,  Koji Yamaji ,  Ryozo Ushio

IPC: H01M4/36 ,  C01G53/00 ,  C01G41/00 ,  H01M4/525 ,  H01M4/505 ,  H01M10/0525

Abstract: A positive electrode active material for nonaqueous electrolyte secondary batteries and production method thereof that are able to improve the stability of positive electrode mixture material pastes used to produce nonaqueous electrolyte secondary batteries, as well as to improve the output characteristics and charge/discharge cycle characteristics of secondary batteries. A method for producing a positive electrode active material for nonaqueous electrolyte secondary batteries includes mixing a fired powder formed of a lithium-metal composite oxide having a layered crystal structure, a first compound which is at least one selected from a group consisting of a lithium-free oxide, a hydrate of the oxide, and a lithium-free inorganic acid salt, and water and drying a mixture resulting from the mixing. The fired powder includes secondary particles formed by agglomeration of primary particles. The first compound reacts with lithium ions in the presence of water to form a second compound including lithium.

公开(公告)号：US10858265B2

公开(公告)日：2020-12-08

申请号：US15569504

申请日：2016-04-27

Applicant: SUMITOMO METAL MINING CO., LTD.

Inventor： Takehide Honma ,  Koji Yamaji ,  Ryozo Ushio

IPC: C01G53/00 ,  H01M4/525 ,  H01M4/485 ,  H01M4/36 ,  H01M4/131 ,  H01M10/052 ,  H01M4/505 ,  H01M10/0525

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≤0.03) is obtained by mixing a slurry that includes the nickel cobalt containing composite hydroxide with a coating aqueous solution that includes Al to form a mixed aqueous solution, and coating the secondary particles with a coating film that includes Al or an Al compound. A cathode active material that is configured so that component elements that include Al are uniformly dispersed in the secondary particles is synthesized using the Al-coated composite hydroxide as a precursor.

公开(公告)号：US10361433B2

公开(公告)日：2019-07-23

申请号：US15527411

申请日：2015-11-13

Applicant: SUMITOMO METAL MINING CO., LTD.

Inventor： Koji Yamaji ,  Ryozo Ushio ,  Takehide Honma ,  Satoshi Yoshio

IPC: H01M4/52 ,  H01M4/525 ,  C01G53/00 ,  H01M4/36 ,  H01M4/505 ,  H01M10/0525 ,  C01G9/02 ,  H01M4/02

Abstract: A positive electrode active material for a nonaqueous electrolyte secondary battery contains lithium nickel cobalt zinc composite oxide represented by general formula (1): LiwNi1-x-y-zCoxZnyMzO2 (0.95≤w≤1.10, 0.05≤x≤0.3, 0.005≤y≤0.08, and 0≤z≤0.3, where M is at least one metal element selected from the group consisting of Mg, Al, Ti, Mn, Fe, and Cu), wherein the lithium nickel cobalt zinc composite oxide has a form of secondary particles each corresponding to an aggregation of primary particles of hexagonal lithium-containing composite oxide with a layered structure, contains zinc oxide on at least a part of a surface of the primary particles and/or a surface of the secondary particles, and has a (003)-plane crystallite diameter of 100 nm or larger and 160 nm or smaller, the diameter being obtained by X-ray diffraction and the Scherrer equation.

公开(公告)号：US20180331358A1

公开(公告)日：2018-11-15

申请号：US15527411

申请日：2015-11-13

Applicant: SUMITOMO METAL MINING CO., LTD.

Inventor： Koji Yamaji ,  Ryozo Ushio ,  Takehide Honma ,  Satoshi Yoshio

IPC: H01M4/525 ,  H01M4/36 ,  C01G53/00 ,  H01M10/0525

CPC classification number: H01M4/525 ,  C01G9/02 ,  C01G53/00 ,  C01G53/42 ,  C01G53/50 ,  C01P2002/60 ,  C01P2004/32 ,  C01P2004/50 ,  C01P2004/61 ,  C01P2004/84 ,  C01P2006/40 ,  H01M4/366 ,  H01M10/0525 ,  H01M2004/021 ,  H01M2004/028

Abstract: A positive electrode active material for a nonaqueous electrolyte secondary battery contains lithium nickel cobalt zinc composite oxide represented by general formula (1): LiwNi1-x-y-zCoxZnyMzO2(0.95≤w≤1.10, 0.05≤x≤0.3, 0.005≤y≤0.08, and 0≤z≤0.3, where M is at least one metal element selected from the group consisting of Mg, Al, Ti, Mn, Fe, and Cu), wherein the lithium nickel cobalt zinc composite oxide has a form of secondary particles each corresponding to an aggregation of primary particles of hexagonal lithium-containing composite oxide with a layered structure, contains zinc oxide on at least a part of a surface of the primary particles and/or a surface of the secondary particles, and has a (003)-plane crystallite diameter of 100 nm or larger and 160 nm or smaller, the diameter being obtained by X-ray diffraction and the Scherrer equation.

公开(公告)号：US20180316006A1

公开(公告)日：2018-11-01

申请号：US15764453

申请日：2016-09-27

Applicant: SUMITOMO METAL MINING CO., LTD.

Inventor： Haruki Kaneda ,  Takaaki Ando ,  Ryozo Ushio

IPC: H01M4/525 ,  C01G53/00 ,  H01M10/0525 ,  H01M4/505

Abstract: The present invention industrially provides: a non-aqueous electrolyte secondary battery having a high energy density and high cycling characteristics; a cathode active material for a non-aqueous electrolyte secondary battery having a high packing efficiency; and a nickel manganese containing composite hydroxide having a small particle size, a narrow particle size distribution, and a high sphericity. When producing the nickel manganese containing composite hydroxide by a crystallization reaction using material solution where metal compounds including nickel and manganese dissolve, a nucleation process is performed in a non-oxidizing atmosphere by stirring an aqueous solution for nucleation, that includes the quantity of the material solution corresponding to 0.6% to 5.0% of the whole amount of substance of metal element included in a metal compound used for the overall crystallization reaction.

公开(公告)号：US10084188B2

公开(公告)日：2018-09-25

申请号：US14411192

申请日：2013-07-01

Applicant: SUMITOMO METAL MINING CO., LTD.

Inventor： Kensaku Mori ,  Masanori Takagi ,  Koji Yamaji ,  Takehide Honma ,  Ryozo Ushio

IPC: H01M4/525 ,  C01G53/00 ,  H01M4/131 ,  H01M10/052 ,  H01M4/02

CPC classification number: H01M4/525 ,  C01G53/006 ,  C01G53/42 ,  C01G53/50 ,  C01G53/66 ,  C01P2004/62 ,  C01P2006/11 ,  C01P2006/12 ,  C01P2006/40 ,  H01M4/131 ,  H01M10/052 ,  H01M2004/028 ,  H01M2220/30

Abstract: A positive electrode active material is provided that has a high capacity, a low irreversible capacity, an excellent initial charge/discharge efficiency, and excellent rate characteristics. This positive electrode active material comprises a hexagonal lithium nickel complex oxide having a layer structure and represented by the general formula LixNi1−y−zCoyMzO2 (0.98≤x≤1.04, 0.25≤y≤0.40, 0≤z≤0.07, and M is at least one element selected from Al, Ti, Mn, Ga, Mg, and Nb), wherein a lithium occupancy rate in a lithium main layer as obtained by Rietveld analysis from the x-ray diffraction pattern is at least 98.7%, and a crystallite diameter as calculated from the peak for the (003) plane in x-ray diffraction is 50 to 300 nm.

公开(公告)号：US12195352B2

公开(公告)日：2025-01-14

申请号：US17083411

申请日：2020-10-29

Applicant: SUMITOMO METAL MINING CO., LTD.

Inventor： Takehide Honma ,  Koji Yamaji ,  Ryozo Ushio

IPC: C01G53/00 ,  H01M4/131 ,  H01M4/36 ,  H01M4/485 ,  H01M4/505 ,  H01M4/525 ,  H01M10/052 ,  H01M10/0525

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≤0.03) is obtained by mixing a slurry that includes the nickel cobalt containing composite hydroxide with a coating aqueous solution that includes Al to form a mixed aqueous solution, and coating the secondary particles with a coating film that includes Al or an Al compound. A cathode active material that is configured so that component elements that include Al are uniformly dispersed in the secondary particles is synthesized using the Al-coated composite hydroxide as a precursor.

公开(公告)号：US11411214B2

公开(公告)日：2022-08-09

申请号：US15771427

申请日：2016-09-30

Applicant: SUMITOMO METAL MINING CO., LTD.

Inventor： Taira Aida ,  Jiro Okada ,  Tetsufumi Komukai ,  Koji Yamaji ,  Ryozo Ushio

IPC: H01M4/36 ,  C01G53/00 ,  C01G41/00 ,  H01M4/525 ,  H01M4/505 ,  H01M10/0525 ,  H01M4/02

Abstract: A positive electrode active material for nonaqueous electrolyte secondary batteries and production method thereof that are able to improve the stability of positive electrode mixture material pastes used to produce nonaqueous electrolyte secondary batteries, as well as to improve the output characteristics and charge/discharge cycle characteristics of secondary batteries. A method for producing a positive electrode active material for nonaqueous electrolyte secondary batteries includes mixing a fired powder formed of a lithium-metal composite oxide having a layered crystal structure, a first compound which is at least one selected from a group consisting of a lithium-free oxide, a hydrate of the oxide, and a lithium-free inorganic acid salt, and water and drying a mixture resulting from the mixing. The fired powder includes secondary particles formed by agglomeration of primary particles. The first compound reacts with lithium ions in the presence of water to form a second compound including lithium.