公开(公告)号：US20240413321A1

公开(公告)日：2024-12-12

申请号：US18810806

申请日：2024-08-21

Applicant: NICHIA CORPORATION

Inventor： Kenichi KOBAYASHI ,  Yukiko SANO

IPC: H01M4/505 ,  C01G53/00 ,  H01M4/131 ,  H01M4/1391 ,  H01M4/485 ,  H01M4/525 ,  H01M10/052 ,  H01M10/0525

Abstract: A method of producing a positive electrode active material for a nonaqueous electrolyte secondary battery, the method includes preparing nickel-containing composite oxide particles having a ratio 1D90/1D10 of a 90% particle size 1D90 to a 10% particle size 1D10 in volume-based cumulative particle size distribution is 3 or less; mixing the composite oxide particles and a lithium compound to obtain a first mixture; subjecting the first mixture to a first heat treatment at a first temperature and a second heat treatment at a second temperature higher than the first temperature to obtain a first heat-treated product; and subjecting the first heat-treated material to a dispersion treatment.

公开(公告)号：US20240021814A1

公开(公告)日：2024-01-18

申请号：US18346429

申请日：2023-07-03

Applicant: NICHIA CORPORATION

Inventor： Hayato ISHIBASHI ,  Kenichi KOBAYASHI ,  Kento ISAI ,  Kenta KAWAI ,  Koichi SUMIWAKA

IPC: H01M4/525 ,  H01M4/505 ,  C01G53/00

CPC classification number: H01M4/525 ,  H01M4/505 ,  C01G53/50 ,  H01M2004/028

Abstract: A method of manufacturing a positive electrode material for a lithium ion secondary battery includes: firing a mixture containing a lithium compound, a nickel-containing complex compound, and a molybdenum compound, to obtain first particles containing a lithium transition metal complex oxide having a composition in which a ratio of a number of moles of nickel to a total number of moles of metals other than lithium is greater than 0.6 and less than 1; and bringing the first particles into contact with a liquid medium in such that a solid content concentration of the first particles is in a range of 20 mass % to 80 mass % to remove a part of molybdenum element contained in the first particles to obtain second particles.

公开(公告)号：US20230045181A1

公开(公告)日：2023-02-09

申请号：US17814814

申请日：2022-07-25

Applicant: NICHIA CORPORATION

Inventor： Masato SONOO ,  Masahiro MURAYAMA ,  Kenichi KOBAYASHI ,  Hideaki HAMADA ,  Jota MORIMOTO

IPC: H01M4/525 ,  H01M4/36 ,  H01M4/505 ,  H01M4/131 ,  H01M4/04

Abstract: A method of producing a positive electrode for a non-aqueous electrolyte secondary battery, includes: providing a lithium transition metal composite oxide having a layered structure, having a ratio D50/DSEM of 1 or more and 4 or less, and having a certain content of nickel and a certain content of cobalt; bringing the lithium transition metal composite oxide into contact with a cobalt compound to obtain an adhered material; heat-treating the adhered material at a temperature higher than 700° C. and lower than 1100° C. to obtain a heat-treated product; obtaining a positive electrode composition containing the heat-treated product, a conductive auxiliary agent, and a binder; and applying and pressurizing the positive electrode composition onto a collector to form an active material layer having a density of 2.7 g/cm3 or more and 3.9 g/cm3 or less on the collector.

公开(公告)号：US20220181621A1

公开(公告)日：2022-06-09

申请号：US17652277

申请日：2022-02-23

Applicant: NICHIA CORPORATION

Inventor： Tomooki KAWASAKI ,  Kenichi KOBAYASHI ,  Takahiro KITAGAWA

IPC: H01M4/525 ,  C01G53/00 ,  H01M4/505

Abstract: A method of producing a positive-electrode active material for a non-aqueous electrolyte secondary battery is provided. The method includes obtaining a precipitate containing nickel and manganese from a solution containing nickel and manganese, heat-treating the resulting precipitate at a temperature of from 850° C. to less than 1100° C. to obtain a first heat-treated product, mixing the first heat-treated product and a lithium compound, and heat-treating the resulting lithium-containing mixture at a temperature of from 550° C. to 1000° C. to obtain a second heat-treated product. The second heat-treated product contains a group of lithium transition metal composite oxide particles having an average particle diameter DSEM of from 0.5 μm to less than 3 μm and D50/DSEM of 1 to 2.5. The lithium transition metal composite oxide particles have a spinel structure based on nickel and manganese.

公开(公告)号：US20190260023A1

公开(公告)日：2019-08-22

申请号：US16404287

申请日：2019-05-06

Applicant: Nichia Corporation

Inventor： Kenichi KOBAYASHI ,  Yukiko SANO

IPC: H01M4/505 ,  H01M4/1391 ,  C01G53/00 ,  H01M4/131 ,  H01M4/485 ,  H01M4/525 ,  H01M10/0525

Abstract: A method of producing a positive electrode active material for a nonaqueous electrolyte secondary battery, the method includes preparing nickel-containing composite oxide particles having a ratio 1D90/1D10 of a 90% particle size 1D90 to a 10% particle size 1D10 in volume-based cumulative particle size distribution is 3 or less; mixing the composite oxide particles and a lithium compound to obtain a first mixture; subjecting the first mixture to a first heat treatment at a first temperature and a second heat treatment at a second temperature higher than the first temperature to obtain a first heat-treated product; and subjecting the first heat-treated material to a dispersion treatment.

公开(公告)号：US20180351175A1

公开(公告)日：2018-12-06

申请号：US15993724

申请日：2018-05-31

Applicant: NICHIA CORPORATION

Inventor： Tomooki KAWASAKI ,  Kenichi KOBAYASHI ,  Takahiro KITAGAWA

IPC: H01M4/525 ,  C01G53/00 ,  H01M4/505

Abstract: A method of producing a positive-electrode active material for a non-aqueous electrolyte secondary battery is provided. The method includes obtaining a precipitate containing nickel and manganese from a solution containing nickel and manganese, heat-treating the resulting precipitate at a temperature of from 850° C. to less than 1100° C. to obtain a first heat-treated product, mixing the first heat-treated product and a lithium compound, and heat-treating the resulting lithium-containing mixture at a temperature of from 550° C. to 1000° C. to obtain a second heat-treated product. The second heat-treated product contains a group of lithium transition metal composite oxide particles having an average particle diameter DSEM of from 0.5 μm to less than 3 μm and D50/DSEM of 1 to 2.5. The lithium transition metal composite oxide particles have a spinel structure based on nickel and manganese.

公开(公告)号：US20250070158A1

公开(公告)日：2025-02-27

申请号：US18946591

申请日：2024-11-13

Applicant: Nichia Corporation

Inventor： Kenichi KOBAYASHI

IPC: H01M4/525 ,  C01G53/00 ,  H01M4/505 ,  H01M10/0525

Abstract: A method of producing a positive electrode active material for a nonaqueous electrolyte secondary battery, the method includes preparing nickel-containing composite oxide particles having a ratio 1D90/1D10 of a 90% particle size 1D90 to a 10% particle size 1D10 in volume-based cumulative particle size distribution of 3 or less; obtaining a raw material mixture containing the composite oxide particles and a lithium compound and having a ratio of a total number of moles of lithium to a total number of moles of metal elements contained in the composite oxide in a range of 1 to 1.3; subjecting the raw material mixture to a heat treatment to obtain a heat-treated material; subjecting the heat-treated material to a dry-dispersion treatment to obtain a first dispersion; and bringing the first dispersion into contact with a liquid medium to obtain a second dispersion.

公开(公告)号：US20170288223A1

公开(公告)日：2017-10-05

申请号：US15474735

申请日：2017-03-30

Applicant: HONDA MOTOR CO., LTD. ,  NICHIA CORPORATION

Inventor： Atsushi OGAWA ,  Soshi KAWAMURA ,  Toru SUKIGARA ,  Hiroto MAEYAMA ,  Kenichi KOBAYASHI

IPC: H01M4/525 ,  H01M4/505 ,  H01M4/36

CPC classification number: H01M4/525 ,  C01G53/42 ,  C01G53/50 ,  C01P2002/20 ,  C01P2002/50 ,  C01P2002/52 ,  C01P2004/03 ,  C01P2004/51 ,  C01P2004/61 ,  C01P2006/40 ,  H01M4/366 ,  H01M4/505 ,  H01M2004/021 ,  H01M2004/028 ,  H01M2220/20

Abstract: A positive electrode active material for a nonaqueous electrolyte secondary battery includes particles of a lithium-transition metal composite oxide that contains nickel in the composition thereof and has a layered structure. The particles have an average particle size DSEM based on electron microscopic observation in a range of 1 μm to 7 μm in which a ratio D50/DSEM of a 50% particle size D50 in volume-based cumulative particle size distribution to the average particle size based on electron microscopic observation is in a range of 1 to 4, and a ratio D90/D10 of a 90% particle size D90 to a 10% particle size D10 in volume-based cumulative particle size distribution is 4 or less.

公开(公告)号：US20150270550A1

公开(公告)日：2015-09-24

申请号：US14667647

申请日：2015-03-24

Applicant: Nichia Corporation

Inventor： Tomooki KAWASAKI ,  Kenichi KOBAYASHI

IPC: H01M4/58

CPC classification number: H01M4/5825 ,  C01G45/1242 ,  C01G51/54

Abstract: The present invention provides a positive electrode active material for nonaqueous electrolyte secondary battery including a lithium transition metal composite oxide represented by the following formula: LiaNixMn2-xFeyBzO4 wherein 1.00≦a≦1.30, 0.30≦x≦0.60, 0.003≦y≦0.200, and 0.003≦z≦0.200.

Abstract translation: 本发明提供一种非水电解质二次电池用正极活性物质，其包含由下式表示的锂过渡金属复合氧化物：LiaNixMn2-xFeyBzO4，其中1.00＆nlE; a＆nlE; 1.30,0.30＆lt; NlE; x＆lt; lE; 0.60,0.003＆ 0.200和0.003＆nlE; z＆nlE; 0.200。

公开(公告)号：US20240429373A1

公开(公告)日：2024-12-26

申请号：US18708203

申请日：2022-10-31

Applicant: NICHIA CORPORATION

Inventor： Shigenobu NODA ,  Takashi ENOMOTO ,  Hideyuki KIRIE ,  Kento ISAI ,  Kenichi KOBAYASHI

IPC: H01M4/36 ,  C01B25/45 ,  H01M4/02 ,  H01M4/58 ,  H01M4/583

Abstract: Provided is a cathode material that can further improve the high-rate performance in a lithium ion secondary battery. The cathode material inculeds secondary particles comprising: primary particles containing a lithium transition metal compound having an olivine structure; and carbon adhering to the surfaces of the primary particles, a plurality of which primary particles are aggregated. The content of the carbon is more than 0.5% by mass and 1.8% by mass or less with respect to the cathode material. The lithium transition metal compound has a crystallite size that is 50 nm to 70 nm. The cathode material has a specific surface area that is 14 m2/g to 45 m2/g.