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1.发明公开公开(公告)号：US20240243262A1
公开(公告)日：2024-07-18
申请号：US18404465
申请日：2024-01-04
发明人： Masaru KUBOTA , So YUBUCHI
IPC分类号： H01M4/36 , H01M4/02 , H01M4/505 , H01M4/62 , H01M10/0562
CPC分类号： H01M4/366 , H01M4/505 , H01M4/628 , H01M10/0562 , H01M2004/021 , H01M2004/028 , H01M2300/0068
摘要： A method of producing a positive electrode active material comprises the following (a) and (b): (a) preparing a slurry by dispersing an active material particle in a coating liquid; and (b) performing spray drying to dry the slurry to produce a positive electrode active material. The active material particle includes an O2-type layered oxide. The coating liquid includes a solute and a solvent. The solute includes at least one selected from the group consisting of Nb, P, and B. The slurry has a solid concentration of more than 42% and not more than 51%.
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公开(公告)号：US20240079574A1
公开(公告)日：2024-03-07
申请号：US18347746
申请日：2023-07-06
CPC分类号： H01M4/483 , H01M4/13 , H01M4/366 , H01M2004/028
摘要： A positive electrode for an all-solid-state battery that comprises a sulfide-based solid electrolyte and a covered active material. The covered active material includes a positive electrode active material particle and a coating film covering at least part of a surface of the positive electrode active material particle. The coating film includes a lithium-ion-conductive oxide, and also includes NOx at at least a surface thereof. A NOx content at the surface of the coating film is more than 1000 ppm.
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公开(公告)号：US20230299283A1
公开(公告)日：2023-09-21
申请号：US18114479
申请日：2023-02-27
发明人： Kazuki MURAISHI , Masaru KUBOTA , Izuru SASAKI , Kenji NAGAO
IPC分类号： H01M4/525 , H01M10/0562 , C01G53/00
CPC分类号： H01M4/525 , H01M10/0562 , C01G53/42 , H01M2300/0068
摘要： In a method for producing a coated active material, a coating layer containing Nb is formed on at least a part of a surface of an active material. The method includes: transforming a slurry containing the active material and a coating solution containing Nb into droplets to obtain slurry droplets; drying the slurry droplets in a heated gas stream to obtain a precursor; and baking the precursor. When obtaining the slurry droplets, a temperature of the slurry before the slurry is transformed into droplets is 5° C. or more and less than 25° C.
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公开(公告)号：US20230299272A1
公开(公告)日：2023-09-21
申请号：US18179690
申请日：2023-03-07
发明人： Kazuki MURAISHI , Masaru KUBOTA , Yusuke NISHIO , Kenji NAGAO
CPC分类号： H01M4/366 , H01M4/505 , H01M4/525 , C01G53/42 , C01G53/50 , C01P2006/40 , C01P2004/86
摘要： A main object of the present disclosure is to provide a coated active material capable of reducing a battery resistance. The present disclosure achieves the object by providing a coated active material comprising: an active material including Ni, and a coating layer configured to coat at least a part of a surface of the active material, and a NiO layer is formed between the active material and the coating layer, and an average thickness of the NiO layer is 0.9 nm or less.
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5.发明公开公开(公告)号：US20240332508A1
公开(公告)日：2024-10-03
申请号：US18616540
申请日：2024-03-26
发明人： Masaru KUBOTA
IPC分类号： H01M4/36 , H01M4/02 , H01M4/62 , H01M10/0525 , H01M10/0562
CPC分类号： H01M4/366 , H01M4/62 , H01M10/0525 , H01M10/0562 , H01M2004/028 , H01M2300/0068
摘要： A positive electrode active material includes: an active material particle; and a coating film. The coating film covers at least a part of a surface of the active material particle. The coating film contains P, B and O as components and further contains Li and Na as optional components. The positive electrode active material satisfies relationships of “formula (1): CLi/(CP+CB)≤1.50” and “formula (2): CNa/(CP+CB)≤1.34”. CLi, CP, CB and CNa represent respective element concentrations each measured by X-ray photoelectron spectroscopy. CLi represents an element concentration of lithium. CP represents an element concentration of phosphorus. CB represents an element concentration of boron. CNa represents an element concentration of lithium.
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公开(公告)号：US20230420735A1
公开(公告)日：2023-12-28
申请号：US18462729
申请日：2023-09-07
发明人： Jun YOSHIDA , Shinya SHIOTANI , Masaru KUBOTA , Yohei SHINDO , Takeshi USAMI
IPC分类号： H01M10/0562 , H01M4/48 , H01M10/44
CPC分类号： H01M10/0562 , H01M4/483 , H01M10/446 , H01M2004/028
摘要： A solid-state battery having a low heat generation amount and low resistance, and a method for producing the same. The solid-state battery is a solid-state battery comprising: a cathode comprising a cathode layer that contains an oxide-based cathode active material, an anode comprising an anode layer that contains an anode active material, and a solid electrolyte layer being disposed between the cathode layer and the anode layer and containing a solid electrolyte, wherein at least any one of the cathode layer and the solid electrolyte layer contains a sulfide-based solid electrolyte, and wherein the sulfide-based solid electrolyte comprises a high oxygen concentration layer on a contact surface with the oxide-based cathode active material, the high oxygen concentration layer having a higher oxygen element concentration than other parts except the contact surface.
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7.发明公开公开(公告)号：US20230361280A1
公开(公告)日：2023-11-09
申请号：US18100235
申请日：2023-01-23
发明人： Hideaki WATANABE , Masaru KUBOTA
IPC分类号： H01M4/36 , H01M4/505 , H01M10/0562 , H01M4/525
CPC分类号： H01M4/366 , H01M4/505 , H01M4/525 , H01M10/0562 , H01M2004/028
摘要： A composite particle includes a positive electrode active material particle and a coating film. The positive electrode active material particle contains a lithium-containing composite oxide having a layered rock salt structure, and the coating film covers at least a part of a surface of the positive electrode active material particle. The coating film contains a phosphate compound, and satisfies a relationship of the following formula (1): XP/T ≥ 0.04 (1). In the above formula (1), XP indicates a mass fraction of phosphorus contained in the composite particle measured by inductively coupled plasma atomic emission spectroscopy, and T indicates a film thickness of the coating film measured by a scanning electron microscope.
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公开(公告)号：US20230327126A1
公开(公告)日：2023-10-12
申请号：US18105039
申请日：2023-02-02
IPC分类号： H01M4/62 , H01M10/0562
CPC分类号： H01M4/625 , H01M10/0562 , H01M2004/028
摘要： The conductive material is used for the positive electrode of the battery. The conductive material includes a substrate and a film. The film covers at least a portion of the surface of the substrate. The substrate comprises a conductive carbon material. The film includes a glass network forming element and oxygen.
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9.发明公开公开(公告)号：US20230307645A1
公开(公告)日：2023-09-28
申请号：US18100929
申请日：2023-01-24
发明人： Masaru KUBOTA , Shinji NAKANISHI
IPC分类号： H01M4/62 , H01M10/0562
CPC分类号： H01M4/62 , H01M10/0562 , H01M2004/028
摘要： The composite particle includes a positive electrode active material particle and a coating film. The coating film covers at least a part of a surface of the positive electrode active material particle. The coating film includes a phosphorus compound. The phosphorus compound includes at least one of Na and K and P.
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10.发明公开公开(公告)号：US20230299292A1
公开(公告)日：2023-09-21
申请号：US18104584
申请日：2023-02-01
发明人： Masaru KUBOTA
IPC分类号： H01M4/62 , H01M10/0562
CPC分类号： H01M4/62 , H01M10/0562 , H01M2004/028
摘要： A composite particle includes a positive electrode active material particle and a coating film. The coating film covers at least a part of a surface of the positive electrode active material particle. The coating film includes a phosphorus compound. The phosphorus compound includes either or both of a first element and a second element, and phosphorus. The first element is a glass network-forming element. The second element is a transition element. The relationship of CLi/(CP+CE1+CE2)≤2.5 is satisfied, where CLi, CP, CE1, and CE2 represent elemental concentrations obtained by measuring the composite particle by X-ray photoelectron spectroscopy, CLi represents an elemental concentration of lithium, CP represents an elemental concentration of phosphorus, CE1 represents an elemental concentration of the first element, and CE2 represents an elemental concentration of the second element.
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