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公开(公告)号：US12237505B2
公开(公告)日：2025-02-25
申请号：US16086225
申请日：2017-01-26
Inventor： Koh Masahara , Kaoru Nagata , Takaya Tochio , Taizou Sunano , Akihiro Kawakita , Takeshi Ogasawara
Abstract: This positive electrode active material for non-aqueous electrolyte secondary batteries comprises: lithium transition metal oxide particles; a metal compound which contains a metal element M and adheres to the surfaces of the lithium transition metal oxide particles; and a lithium metal compound which contains lithium (Li) and the metal element M and adheres to the surfaces of the lithium transition metal oxide particles. In this connection, the metal element M is composed of at least one substance that is selected from among aluminum (Al), titanium (Ti), manganese (Mn), gallium (Ga), molybdenum (Mo), tin (Sn), tungsten (W) and bismuth (Bi).
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公开(公告)号：US10910631B2
公开(公告)日：2021-02-02
申请号：US16081191
申请日：2017-02-01
Inventor： Kaoru Nagata , Noriko Manabe
Abstract: A non-aqueous electrolyte secondary battery according to one mode of the present disclosure is provided with: a positive electrode including a positive-electrode active material layer; a negative electrode; and a non-aqueous electrolyte, wherein the positive-electrode active material layer includes positive-electrode active material particles having a particle size distribution in which the difference (D90-D10) between a 90% diameter (D90) and a 10% diameter (D10) measured with a laser diffraction method is larger than 13 μm. In addition, the positive-electrode active material layer is characterized in that, on an arbitrarily defined cross section thereof, the total area of positive-electrode active material particles A, each of which has a particle size not smaller than 15 μm and has a particle area at least 0.8-fold the area of a circle circumscribing the positive-electrode active material particle, is 20% or larger with respect to the total area of the cross section.
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3.发明申请公开(公告)号：US20200099050A1
公开(公告)日：2020-03-26
申请号：US16472512
申请日：2017-12-18
Inventor： Takaya Tochio , Kaoru Nagata , Takeshi Ogasawara
IPC: H01M4/525 , H01M4/131 , H01M4/62 , H01M10/0525
Abstract: A positive electrode for a non-aqueous electrolyte secondary battery contains a first particle and a second particle. The first particle is an electrochemically active positive-electrode active material, and the positive-electrode active material contains a lithium transition metal oxide. The second particle is an electrochemically inactive metal oxide and has a BET specific surface area in the range of 10 to 100 m2/g and a sphericity of 0.8 or more.
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4.发明申请公开(公告)号：US20190386299A1
公开(公告)日：2019-12-19
申请号：US16471950
申请日：2017-12-14
Inventor： Takaya Tochio , Kaoru Nagata , Takeshi Ogasawara
IPC: H01M4/36 , H01M4/525 , H01M10/0525 , H01M4/62 , H01M4/131
Abstract: A positive electrode for a non-aqueous electrolyte secondary battery contains a first particle and a second particle. The first particle contains an electrochemically active positive-electrode active material, and the positive-electrode active material contains a lithium transition metal oxide. The second particle contains an electrochemically inactive metal oxide. An electrochemically inactive phosphate adheres to the surface of the second particle.
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Patent Agency Ranking
公开(公告)号：US11456452B2
公开(公告)日：2022-09-27
申请号：US16471950
申请日：2017-12-14
Inventor： Takaya Tochio , Kaoru Nagata , Takeshi Ogasawara
Abstract: A positive electrode for a non-aqueous electrolyte secondary battery contains a first particle and a second particle. The first particle contains an electrochemically active positive-electrode active material, and the positive-electrode active material contains a lithium transition metal oxide. The second particle contains an electrochemically inactive metal oxide. An electrochemically inactive phosphate adheres to the surface of the second particle.
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公开(公告)号：US20200295366A1
公开(公告)日：2020-09-17
申请号：US16086225
申请日：2017-01-26
Inventor： Koh Masahara , Kaoru Nagata , Takaya Tochio , Taizou Sunano , Akihiro Kawakita , Takeshi Ogasawara
IPC: H01M4/525 , C01G53/00 , H01M10/0525 , H01M4/36
Abstract: This positive electrode active material for non-aqueous electrolyte secondary batteries comprises: lithium transition metal oxide particles; a metal compound which contains a metal element M and adheres to the surfaces of the lithium transition metal oxide particles; and a lithium metal compound which contains lithium (Li) and the metal element M and adheres to the surfaces of the lithium transition metal oxide particles. In this connection, the metal element M is composed of at least one substance that is selected from among aluminum (Al), titanium (Ti), manganese (Mn), gallium (Ga), molybdenum (Mo), tin (Sn), tungsten (W) and bismuth (Bi).
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公开(公告)号：US20190067677A1
公开(公告)日：2019-02-28
申请号：US16081191
申请日：2017-02-01
Inventor： Kaoru Nagata , Noriko Manabe
IPC: H01M4/131 , H01M10/0525 , H01M4/525 , H01M4/36
Abstract: A non-aqueous electrolyte secondary battery according to one mode of the present disclosure is provided with: a positive electrode including a positive-electrode active material layer; a negative electrode; and a non-aqueous electrolyte, wherein the positive-electrode active material layer includes positive-electrode active material particles having a particle size distribution in which the difference (D90-D10) between a 90% diameter (D90) and a 10% diameter (D10) measured with a laser diffraction method is larger than 13 μm. In addition, the positive-electrode active material layer is characterized in that, on an arbitrarily defined cross section thereof, the total area of positive-electrode active material particles A, each of which has a particle size not smaller than 15 μm and has a particle area at least 0.8-fold the area of a circle circumscribing the positive-electrode active material particle, is 20% or larger with respect to the total area of the cross section.
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公开(公告)号：US20250158055A1
公开(公告)日：2025-05-15
申请号：US19028043
申请日：2025-01-17
Inventor： Koh Masahara , Kaoru Nagata , Takaya Tochio , Taizou Sunano , Akihiro Kawakita , Takeshi Ogasawara
Abstract: This positive electrode active material for non-aqueous electrolyte secondary batteries comprises: lithium transition metal oxide particles; a metal compound which contains a metal element M and adheres to the surfaces of the lithium transition metal oxide particles; and a lithium metal compound which contains lithium (Li) and the metal element M and adheres to the surfaces of the lithium transition metal oxide particles. In this connection, the metal element M is composed of at least one substance that is selected from among aluminum (Al), titanium (Ti), manganese (Mn), gallium (Ga), molybdenum (Mo), tin (Sn), tungsten (W) and bismuth (Bi).
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公开(公告)号：US20180248220A1
公开(公告)日：2018-08-30
申请号：US15753772
申请日：2016-08-23
Inventor： Noriko Manabe , Kaoru Nagata , Masahiro Kinoshita , Taizou Sunano
IPC: H01M10/0525 , H01M4/525 , H01M4/587 , H01M4/38 , H01M4/36
CPC classification number: H01M10/0525 , H01M4/131 , H01M4/364 , H01M4/386 , H01M4/525 , H01M4/587 , H01M2004/021
Abstract: In a nonaqueous electrolyte secondary battery which includes an electrode assembly that includes a positive electrode including a positive electrode current collector and a positive electrode mixture layer, a negative electrode including a negative electrode current collector and a negative electrode mixture layer, and a separator, the positive electrode mixture layer contains Ni in a proportion of not less than 85 mol % relative to the total molar amount of metal element(s) except lithium, and includes a lithium transition metal oxide bearing on the surface thereof an attached element belonging to Group VI of the periodic table. The negative electrode mixture layer includes a carbon material and a silicon compound. The surface pressure present on a plane in which the positive electrode and the negative electrode are opposed to each other through the separator is not less than 0.1 MPa/cm2.
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