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公开(公告)号：US10897044B2
公开(公告)日：2021-01-19
申请号：US15706384
申请日：2017-09-15
发明人： Ryuuta Yamaya , Masataka Oyama
摘要： A cathode material for a lithium-ion secondary battery of the present invention is active material particles including central particles represented by General Formula LixAyDzPO4 (0.9
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公开(公告)号：US10074853B2
公开(公告)日：2018-09-11
申请号：US15075790
申请日：2016-03-21
发明人： Ryuuta Yamaya , Satoru Oshitari , Masataka Oyama
IPC分类号： H01M4/36 , H01M4/583 , H01M2/16 , H01M4/136 , H01M4/38 , H01M4/58 , H01M4/62 , H01M4/66 , H01M10/0525 , H01M10/0568 , H01M10/0569 , H01M4/04 , H01M4/1397 , H01M4/02
CPC分类号： H01M4/366 , H01M2/162 , H01M2/1653 , H01M4/0404 , H01M4/043 , H01M4/0471 , H01M4/136 , H01M4/1397 , H01M4/382 , H01M4/5825 , H01M4/583 , H01M4/623 , H01M4/625 , H01M4/628 , H01M4/661 , H01M10/052 , H01M10/0525 , H01M10/0568 , H01M10/0569 , H01M2004/021 , H01M2004/027 , H01M2004/028 , H01M2220/20 , H01M2220/30 , H01M2300/0037 , Y02T10/7011
摘要： [Problems] To provide an electrode material for a lithium-ion rechargeable battery capable of improving the battery characteristics, durability, and stability of a lithium-ion rechargeable battery, an electrode for a lithium-ion rechargeable battery, and a lithium-ion rechargeable battery.[Means] An electrode material for a lithium-ion rechargeable battery of the present invention is an electrode material for a lithium-ion rechargeable battery formed by coating the surface of an electrode active material represented by General Formula LixAyDzPO4 (here, A represents at least one element selected from Co, Mn, Ni, Fe, Cu, and Cr, D represents at least one element selected from Mg, Ca, Sr, Ba, Ti, Zn, B, Al, Ga, In, Si, Ge, Sc, and Y, 1≤x≤1.1, 0
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公开(公告)号：US10008715B2
公开(公告)日：2018-06-26
申请号：US15460749
申请日：2017-03-16
CPC分类号： H01M4/364 , H01M4/366 , H01M4/5825 , H01M4/625 , H01M4/661 , H01M10/0525 , H01M2004/028
摘要： A cathode material for a lithium-ion secondary battery made of agglomerated particles formed by agglomeration of a plurality of primary particles of a cathode active material represented by General Formula (1) below which are coated with a carbonaceous film, in which, in a case in which a cathode mixture layer including the cathode material, a conductive auxiliary agent, and a binding agent in a weight ratio (the cathode material/the conductive auxiliary agent/the binding agent) of 90:5:5 is calendered on a 30 μm-thick aluminum current collector at a total applied pressure of 5 t/250 mm, a film thickness change percentage of the cathode mixture layer before and after the calendering is 30% or less, LixAyDzPO4 (1).
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公开(公告)号：US10431817B2
公开(公告)日：2019-10-01
申请号：US15716883
申请日：2017-09-27
发明人： Hirofumi Yasumiishi , Ryuuta Yamaya
IPC分类号： H01M4/36 , H01M4/136 , H01M10/0525 , H01M4/04 , H01M4/58 , H01M4/583 , H01M4/133 , H01M4/1397 , H01M4/62 , H01M4/02
摘要： An electrode material includes an inorganic particle and a carbonaceous film coating a surface of the inorganic particle, in which an amount of carbon is 0.8 to 2.5% by mass, and volume of micropores in a micropore diameter range of 2 to 200 nm is 3×10−2 to 3×10−1 cm3/g. A method for manufacturing an electrode material includes a step of immersing the inorganic particle in an aqueous solution, a step of producing a slurry including the inorganic particle immersed in an aqueous solution, a carbonaceous film precursor, and water, a step of producing a dried substance of the slurry, and a step of calcinating the dried substance in a non-oxidative atmosphere, in which an amount of the carbonaceous film precursor blended into the inorganic particle is 1.0 to 5.0 parts by mass. A lithium-ion secondary battery includes a cathode that is the electrode; an anode; and a non-aqueous electrolyte.
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公开(公告)号：US10290856B2
公开(公告)日：2019-05-14
申请号：US14665513
申请日：2015-03-23
发明人： Masataka Oyama , Satoru Oshitari , Ryuuta Yamaya
摘要： A cathode material including an aggregate formed by aggregating active material particles, in which the active material particle is a particle including a cathode active material as a formation material and a carbonaceous material is provided on a surface of the particle, a ratio between a weight ratio of carbon contained in the aggregate to a BET specific surface area of the cathode material is in a range of 0.08 to 0.2, a tap density is in a range of 0.9 g/cm3 to 1.5 g/cm3, and an oil absorption amount for which N-methyl-2-pyrrolidone is used is 70 cc/100 g or less.
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公开(公告)号：US09966595B2
公开(公告)日：2018-05-08
申请号：US15280488
申请日：2016-09-29
发明人： Hirofumi Yasumiishi , Ryuuta Yamaya
IPC分类号： H01M4/13 , H01M4/136 , H01M4/133 , H01M4/1393 , H01M4/1397 , H01M4/36 , H01M4/587 , H01M10/0525 , H01M4/04 , H01M4/62 , H01M4/58
CPC分类号： H01M4/136 , H01M4/0471 , H01M4/133 , H01M4/1393 , H01M4/1397 , H01M4/366 , H01M4/5825 , H01M4/587 , H01M4/625 , H01M10/0525 , H01M2220/30
摘要： An electrode material includes inorganic particles of LiFexMn1-x-yMyPO4 and a carbonaceous film coating surfaces of the inorganic particles, and volume of micropores having micropore diameter of 2 to 10 nm is 3 to 11 cm3/g. A method for manufacturing an electrode material includes immersing the inorganic particles in an aqueous solution having pH of 7.0 to 10.0; producing a slurry including the inorganic particles, a carbonaceous film precursor, and water; producing a dried substance of the slurry by drying the slurry; and calcinating the dried substance in a non-oxidative atmosphere of 500° C. to 1,000° C., and an amount of the carbonaceous film precursor blended into 100 parts by mass of the inorganic particles when converted to a carbon element is 1.0 to 5.0 parts by mass. An electrode includes the electrode material. A lithium-ion secondary battery includes a cathode; an anode; and a non-aqueous electrolyte, the cathode being the electrode.
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公开(公告)号：US09960426B2
公开(公告)日：2018-05-01
申请号：US15470337
申请日：2017-03-27
发明人： Hirofumi Yasumiishi , Ryuuta Yamaya
IPC分类号： H01M4/58 , H01M10/0525 , H01M4/04 , H01M4/36 , H01M4/62 , H01M4/136 , H01M4/1397 , H01M4/02
CPC分类号： H01M4/5825 , H01M4/0402 , H01M4/0404 , H01M4/0471 , H01M4/136 , H01M4/1397 , H01M4/366 , H01M4/625 , H01M10/0525 , H01M2004/028
摘要： An electrode material for a lithium-ion secondary battery of the present invention is secondary particles including inorganic particles represented by General Formula LiFexMn1-x-yMyPO4 and a carbonaceous film coating surfaces of the inorganic particles, in which an amount of carbon is 0.5% by mass to 2.5% by mass, a specific surface area is 10 m2/g to 20 m2/g, a first particle diameter (D90(a)) at which a cumulative volume percentage of a particle size distribution of secondary particles is 90% before an ultrasonic treatment is 20 mm to 40 mm, a second particle diameter (D90(b)) at which the cumulative volume percentage of the particle size distribution of the secondary particles is 90% after the ultrasonic treatment is 10 mm to 15 mm, and a ratio (D90(b)/D90(a)) of the second particle diameter (D90(b)) to the first particle diameter (D90(a)) is 0.3 to 0.5.
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公开(公告)号：US11251422B2
公开(公告)日：2022-02-15
申请号：US16544704
申请日：2019-08-19
发明人： Tsutomu Nozoe , Ryuuta Yamaya
IPC分类号： H01M10/0525 , H01M4/133 , H01M4/139 , H01M4/36 , H01M4/136 , H01M4/587 , H01M4/58 , H01M4/02
摘要： A method of producing a positive electrode material for lithium-ion secondary batteries, which includes a pyrolyzed carbon coating, the method including a heat treatment step of thermally decomposing an organic compound using a rotary kiln to form a pyrolyzed carbon coating, wherein the organic compound is a carbon source that forms the pyrolyzed carbon coating of a positive electrode material.
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公开(公告)号：US10573890B2
公开(公告)日：2020-02-25
申请号：US15936164
申请日：2018-03-26
发明人： Masataka Oyama , Ryuuta Yamaya , Takao Kitagawa
摘要： A cathode material for a lithium-ion secondary battery including: granulated bodies in which primary particles are aggregated, wherein an average particle diameter of the granulated bodies is 0.90 μm or more and 2.00 μm or less, particle diameters of 90% or more of the granulated bodies are 0.25 μm or more and 3.50 μm or less, wherein particle diameters of the granulated bodies are evaluated such that 300 granulated bodies are randomly selected from a view of the granulated bodies using a scanning electron microscope, a plurality of diameters of each of the 300 granulated bodies that pass through a central point thereof are evaluated, and a maximum diameter selected from said plurality of diameters is considered as a particle diameter of each of the granulated bodies.
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公开(公告)号：US10547048B2
公开(公告)日：2020-01-28
申请号：US15928673
申请日：2018-03-22
发明人： Satoru Oshitari , Ryuuta Yamaya
IPC分类号： H01M4/136 , H01M4/36 , C01B25/45 , H01M4/58 , H01M10/0525
摘要： An electrode material for a lithium ion battery including an active material represented by LiMPO4 (M is at least one selected from the group consisting of Fe, Mn, Co, Ni, Zn, Al, Ga, Mg, and Ca), in which an oil absorption amount for which diethyl carbonate is used (DEC oil absorption amount) is 50 cc/100 g or more and 80 cc/100 g or less, and a ratio (DEC/NMP) of the DEC oil absorption amount to an oil absorption amount for which N-methyl-2-pyrrolidinone is used (NMP oil absorption amount) is 1.3 or more and 1.8 or less.
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