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公开(公告)号：US20240266526A1
公开(公告)日：2024-08-08
申请号：US18612166
申请日：2024-03-21
Applicant: SUMITOMO METAL MINING CO., LTD.
Inventor： Hiroko Oshita , Kazuomi Ryoshi , Taira Aida , Koji Yamaji , Jiro Okada
CPC classification number: H01M4/505 , H01M4/0471 , H01M4/362 , H01M4/366 , H01M4/525 , H01M10/0525 , H01M2004/021 , H01M2004/028
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 [%].
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公开(公告)号：US11108042B2
公开(公告)日：2021-08-31
申请号：US16484697
申请日：2018-02-08
Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA , SUMITOMO METAL MINING CO., LTD. , Daisuke Horikawa , Ryuta Sugiura , Taira Aida , Satoshi Kanada
Inventor： Daisuke Horikawa , Ryuta Sugiura , Taira Aida , Satoshi Kanada
Abstract: A positive electrode composite material for a lithium ion secondary battery that makes it possible to appropriately reduce the electric resistance in a positive electrode and to realize a high-performance lithium ion secondary battery. The positive electrode composite material to be used in the positive electrode of the lithium ion secondary battery includes a particulate positive electrode active material composed of a lithium composite oxide having a layered crystal structure including at least lithium, and a conductive oxide. Here, a particulate region where primary particles of the conductive oxide are aggregated, and a film-shaped region where the conductive oxide is formed in a film shape adhere to at least a part of the surface of the positive electrode active material. The average particle diameter based on cross-sectional TEM observation of primary particles in the particulate region is equal to or greater than 0.3 nm, and in cross-sectional TEM observation of the film-shaped region, no particles with a particle diameter equal to or greater than 0.3 nm are observed, and there are no voids equal to or greater than 2 nm.
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公开(公告)号：US20200350565A1
公开(公告)日：2020-11-05
申请号：US16760130
申请日：2018-07-31
Applicant: SUMITOMO METAL MINING CO., LTD.
Inventor： Hiroko Oshita , Kazuomi Ryoshi , Taira Aida , Koji Yamaji , Jiro Okada
IPC: H01M4/36 , H01M4/525 , H01M4/505 , H01M4/133 , H01M4/1393 , H01M4/04 , H01M10/0525
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 [96 by mass] or less, the specific surface area is 2.0 to 3.0 [m2/g], and the porosity is 20 to 50 [96].
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公开(公告)号：US20190051929A1
公开(公告)日：2019-02-14
申请号：US16086746
申请日：2017-03-22
Applicant: SUMITOMO METAL MINING CO., LTD.
Inventor： Jiro Okada , Taira Aida , Tetsufumi Komukai
Abstract: The present invention has an object to provide a positive electrode active material for a non-aqueous electrolyte secondary battery which can improve stability of a positive electrode mixed material paste when manufacturing the secondary battery and can increase the battery capacity and improve output characteristic of the secondary battery. A method for manufacturing a positive electrode active material for a non-aqueous electrolyte secondary battery includes mixing fired powder containing lithium-metal composite oxide having a crystal structure of a layered structure with water, and drying this mixture. The fired powder includes secondary particles formed by agglomeration of primary particles. Water is mixed thereto with an amount with which pH of a supernatant obtained after 5 g of the positive electrode active material is dispersed into 100 mL of pure water followed by statically leaving the dispersion solution for 10 minutes falls within a range of 11 to 11.9 at 25° C.
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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
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.
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Patent Agency Ranking
公开(公告)号：US11121368B2
公开(公告)日：2021-09-14
申请号：US15779451
申请日：2016-10-31
Applicant: SUMITOMO METAL MINING CO., LTD.
Inventor： Koji Yamaji , Taira Aida , Ryozo Ushio
IPC: H01M10/04 , H01M10/0525 , C01G41/02 , C01G53/04 , H01M4/1391 , H01M4/505 , H01M4/525 , H01M4/62 , C01G41/00 , H01M10/052 , H01M4/36 , C01G53/00 , H01M4/131
Abstract: An object of the present invention is to provide a positive electrode material for a nonaqueous electrolyte secondary battery, which is capable of inhibiting the gelation of a positive electrode composite material paste without decreasing the charge and discharge capacity and the output characteristics, when used as a positive electrode material for batteries. The positive electrode active material for a nonaqueous electrolyte secondary battery comprises a mixture containing a lithium metal composite oxide represented by a general formula LiaNi1-x-y-zCoxMnyMzO2 (wherein, 0.03≤x≤0.35, 0≤y≤0.35, 0≤z≤0.05, 0.97≤a≤1.30, and M is at least one type of element selected from V, Fe, Cu, Mg, Mo, Nb, Ti, Zr, W and Al) and an ammonium tungstate powder, wherein when 5 g of the positive electrode material is mixed with 100 ml of pure water, the mixture is stirred for 10 minutes and then left to stand for 30 minutes, and then the pH of a supernatant fluid at 25° C. was measured, the pH ranges from 11.2 to 11.8.
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公开(公告)号：US11024839B2
公开(公告)日：2021-06-01
申请号：US16461072
申请日：2017-11-21
Applicant: SUMITOMO METAL MINING CO., LTD.
Inventor： Takahiro Toma , Hiroko Senba , Taira Aida , Tetsufumi Komukai
IPC: H01M4/36 , C01G53/00 , C01G53/04 , C30B7/14 , C30B29/22 , H01M4/485 , H01M4/505 , H01M4/525 , H01M10/0525 , H01M4/02
Abstract: A transition metal-containing composite hydroxide comprises secondary particles having: a center portion of fine primary particles; and an outer-shell portion having a high-density layer of plate-shaped primary particles formed outside the center portion, a low-density layer of the fine primary particles formed outside the high-density layer, and an outer-shell layer of the plate-shaped primary particles formed outside the low-density layer. The composite hydroxide is obtained by a method comprising a nucleation step in an oxidizing atmosphere and a particle growth step, the particle growth step comprising: a first stage of maintaining the oxidizing atmosphere; a second stage of switching to and maintaining a non-oxidizing atmosphere; a third stage of switching again to and maintaining the oxidizing atmosphere; and a fourth stage of switching again to and maintaining the non-oxidizing atmosphere.
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公开(公告)号：US20200335781A1
公开(公告)日：2020-10-22
申请号：US16760101
申请日：2018-07-31
Applicant: SUMITOMO METAL MINING CO., LTD.
Inventor： Hiroko Oshita , Kazuomi Ryoshi , Taira Aida , Koji Yamaji , Jiro Okada
IPC: H01M4/525 , H01M4/505 , H01M10/0525
Abstract: The present invention provides a lithium-nickel-manganese-cobalt composite oxide in which the reactivity between a lithium raw material and a metal composite hydroxide is improved so that a high low-temperature output characteristic can be achieved, a method for manufacturing the composite oxide, and a positive electrode active material and the like without causing a problem of gelation 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. The secondary particle has a solid 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, and the specific surface area is 1.0 to 2.0 [m2/g].
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9.发明申请公开(公告)号：US20180316000A1
公开(公告)日：2018-11-01
申请号：US15953947
申请日：2018-04-16
Inventor： Ryuta Sugiura , Satoshi Kanada , Tetsutaro Hayashi , Taira Aida
Abstract: A positive electrode active material includes secondary particles. The secondary particles include a plurality of primary particles. The primary particles include a lithium-containing composite metal oxide. Inside the secondary particles, an electron conducting oxide is disposed at at least a part of a grain boundary between the primary particles. The electron conducting oxide has a perovskite structure.
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公开(公告)号：US11967709B2
公开(公告)日：2024-04-23
申请号：US16760130
申请日：2018-07-31
Applicant: SUMITOMO METAL MINING CO., LTD.
Inventor： Hiroko Oshita , Kazuomi Ryoshi , Taira Aida , Koji Yamaji , Jiro Okada
CPC classification number: H01M4/505 , H01M4/0471 , H01M4/362 , H01M4/366 , H01M4/525 , H01M10/0525 , H01M2004/021 , H01M2004/028
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 [%].
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