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公开(公告)号：US12009506B2
公开(公告)日：2024-06-11
申请号：US16930746
申请日：2020-07-16
Inventor： Yuji Yamamoto , Momoko Procter , Yoshinari Makimura , Tetsutaro Hayashi , Willy Shun Kai Bong
IPC: H01M4/36 , H01M4/02 , H01M4/131 , H01M4/485 , H01M10/0525
CPC classification number: H01M4/366 , H01M4/131 , H01M4/485 , H01M10/0525 , H01M2004/027
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.
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公开(公告)号：US20210395105A1
公开(公告)日：2021-12-23
申请号：US17287726
申请日：2019-10-21
Applicant: SUMITOMO METAL MINING CO., LTD.
Inventor： Tetsutaro Hayashi , Shinsuke Suganuma , Shuuzou Ozawa
IPC: C01G53/04 , H01M4/525 , H01M4/505 , H01M4/36 , H01M10/0525
Abstract: A method for producing a metal composite hydroxide, which includes a first crystallization process of supplying a first raw material aqueous and performing a crystallization reaction and a second crystallization process of supplying a second raw material aqueous solution containing a more amount of tungsten than the first raw material aqueous solution and performing a crystallization reaction to form a tungsten-concentrated layer and in which switching of reaction atmosphere from either atmosphere of a non-oxidizing atmosphere or an oxidizing atmosphere to the other atmosphere is performed two or more times in particle growth and the time for supplying the second raw material aqueous solution into the reaction tank in the non-oxidizing atmosphere is 50% or more with respect to the entire time for supplying the second raw material aqueous solution into the reaction tank.
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公开(公告)号：US20210020925A1
公开(公告)日：2021-01-21
申请号：US16930746
申请日：2020-07-16
Inventor： Yuji Yamamoto , Momoko Procter , Yoshinari Makimura , Tetsutaro Hayashi , Willy Shun Kai Bong
IPC: H01M4/36 , H01M4/485 , H01M4/131 , H01M10/0525
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.
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公开(公告)号：US11967700B2
公开(公告)日：2024-04-23
申请号：US16926163
申请日：2020-07-10
Inventor： Yuji Yamamoto , Momoko Procter , Yoshinari Makimura , Tetsutaro Hayashi , Willy Shun Kai Bong
IPC: H01M4/131 , H01M4/02 , H01M4/36 , H01M4/525 , H01M10/0525
CPC classification number: H01M4/131 , H01M4/366 , H01M4/525 , H01M10/0525 , H01M2004/021 , H01M2004/027 , H01M2004/028
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.
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公开(公告)号：US11777084B2
公开(公告)日：2023-10-03
申请号：US16925714
申请日：2020-07-10
Inventor： Yuji Yamamoto , Momoko Procter , Yoshinari Makimura , Tetsutaro Hayashi , Willy Shun Kai Bong
IPC: H01M4/62 , H01M4/485 , H01M4/36 , H01M4/02 , H01M10/0525
CPC classification number: H01M4/366 , H01M4/485 , H01M4/62 , H01M10/0525 , H01M2004/021 , H01M2004/028
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.
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Patent Agency Ranking
6.发明申请公开(公告)号：US20150021518A1
公开(公告)日：2015-01-22
申请号：US14379924
申请日：2013-02-14
Applicant: Sumitomo Metal Mining Co., Ltd.
Inventor： Rei Kokado , Kensaku Mori , Masanori Takagi , Tetsutaro Hayashi
IPC: H01M4/36
CPC classification number: H01M4/1391 , B29B7/005 , B29C43/003 , B29C43/02 , B29K2105/16 , B29K2509/00 , B29K2995/0005 , B29L2031/3468 , C01G53/42 , C01G53/50 , C01P2004/61 , C01P2004/62 , C01P2006/12 , C01P2006/40 , H01M4/043 , H01M4/131 , H01M4/364 , H01M4/485 , H01M4/525 , H01M4/622 , H01M4/624 , H01M10/052 , H01M10/0525 , H01M2004/028 , H01M2220/20
Abstract: Provided is a positive-electrode material for nonaqueous-electrolyte secondary batteries, the positive-electrode material being capable of achieving both high capacity and high output when used for a positive electrode for nonaqueous-electrolyte secondary batteries. Also, provided is a method for manufacturing the positive-electrode material for nonaqueous-electrolyte secondary batteries, wherein a lithium metal composite oxide powder is mixed with lithium tungstate, the lithium metal composite oxide powder being represented by a general formula LizNi1-x-yCoxMyO2 (wherein 0.10≦x≦0.35, 0≦y≦0.35, 0.97≦z≦1.20, and M is an addition element and at least one element selected from Mn, V, Mg, Mo, Nb, Ti, and Al) and comprising primary particles and secondary particles composed of aggregation of the primary particles.
Abstract translation: 本发明提供一种非水电解质二次电池用正极材料，正极材料在用于非水电解质二次电池用正极时，能够实现高容量，高输出。 此外，提供一种制造非水电解质二次电池用正极材料的方法，其中将锂金属复合氧化物粉末与钨酸锂混合，所述锂金属复合氧化物粉末由通式LizNi1-x-yCoxMyO2 （其中0.10和nlE; x和nlE; 0.35,0和nlE; y＆nlE; 0.35,0.97和nlE; z＆nlE; 1.20，M是添加元素和至少一种选自Mn，V，Mg，Mo，Nb，Ti和Al的元素） 并且包含由一次粒子的聚集构成的一次粒子和二次粒子。
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公开(公告)号：US11757085B2
公开(公告)日：2023-09-12
申请号：US16929166
申请日：2020-07-15
Inventor： Yuji Yamamoto , Momoko Procter , Yoshinari Makimura , Tetsutaro Hayashi , Willy Shun Kai Bong
IPC: H01M4/131 , H01M4/36 , H01M10/0525 , H01M4/525 , H01M4/485 , H01M4/505 , H01M4/1391 , H01M4/02
CPC classification number: H01M4/131 , H01M4/1391 , H01M4/366 , H01M4/485 , H01M4/505 , H01M4/525 , H01M10/0525 , H01M2004/021 , H01M2004/027 , H01M2004/028
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. Each of the porous particles has at least two voids each of which has the percentage of a void area with respect to the area occupied by each of the particles in a cross-sectional view thereof of at least 1%. Each of the porous particles is provided with a coating of lithium tungstate on a surface thereof.
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公开(公告)号：US20220384804A1
公开(公告)日：2022-12-01
申请号：US17761772
申请日：2020-09-18
Applicant: SUMITOMO METAL MINING CO., LTD.
Inventor： Tetsutaro Hayashi , Shun Kai Bong , Toshihiro Kato
IPC: H01M4/525 , H01M4/50 , H01M10/0525
Abstract: A positive electrode active material is constituted by lithium transition metal-containing composite oxide particles having a layered rock salt type crystal structure and are composed of secondary particles each formed of an aggregation of primary particles. The secondary particles have a d50 of 3.0 to 7.0 μm, a BET specific surface area of 1.8 to 5.5 m2/g, a pore peak diameter of 0.01 to 0.30 μm, and a log differential pore volume [dV/d(log D)] of 0.2 to 0.6 ml/g within a range of the pore peak diameter. In each of a plurality of primary particles having a primary particle size of 0.1 to 1.0 μm, a coefficient of variation of the concentration of an additive element M is 1.5 or less.
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公开(公告)号：US20220115655A1
公开(公告)日：2022-04-14
申请号：US17264963
申请日：2019-07-03
Applicant: SUMITOMO METAL MINING CO., LTD.
Inventor： Satoshi Kanada , Tetsutaro Hayashi
Abstract: The cathode active material is capable of reducing cathode resistance of a secondary battery by enhancing electron conductivity thereof without reducing discharge capacity of the secondary battery. The method for manufacturing a cathode active material includes: mixing transition metal-containing composite compound particles containing lanthanum with a lithium compound to obtain a lithium mixture; calcinating the lithium mixture at a temperature equal to or lower than the melting point of the lithium compound; and then subjecting the lithium mixture to main firing at a firing temperature within a range of 725° C. to 1000° C. Lithium carbonate is preferably used as the lithium compound, and in this case, the calcination temperature is within a range of 600° C. to 723° C. It is preferable to obtain the transition metal-containing composite compound particles containing lanthanum by a coprecipitation method and to uniformly disperse a lanthanum element in the particles.
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公开(公告)号：US20210020901A1
公开(公告)日：2021-01-21
申请号：US16929166
申请日：2020-07-15
Inventor： Yuji Yamamoto , Momoko Procter , Yoshinari Makimura , Tetsutaro Hayashi , Willy Shun Kai Bong
IPC: H01M4/131 , H01M4/36 , H01M10/0525
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. Each of the porous particles has at least two voids each of which has the percentage of a void area with respect to the area occupied by each of the particles in a cross-sectional view thereof of at least 1%. Each of the porous particles is provided with a coating of lithium tungstate on a surface thereof.
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