公开(公告)号：US20220255064A1

公开(公告)日：2022-08-11

申请号：US17589852

申请日：2022-01-31

Applicant: NICHIA CORPORATION

Inventor： Kenta KAWAI ,  Yoshiteru MIYAMOTO ,  Taiga SHIRAISHI ,  Yasuhiro YOSHIDA ,  Masahiro MURAYAMA ,  Tomoya MATSUI

IPC: H01M4/36 ,  H01M4/525 ,  H01M4/505 ,  H01M10/0525 ,  C01G53/00

Abstract: The positive electrode active material includes secondary particles formed by aggregation of a plurality of primary particles that contain a lithium transition metal composite oxide having a layered structure and containing lithium and nickel. The secondary particles have a smoothness greater than 0.73, and a circularity greater than 0.83. The secondary particles contain cobalt and have a first region at a depth of 150 nm from a surface of the respective secondary particle and a second region at a depth of 10 nm or less from the surface of the respective secondary particle, and a ratio of a number of moles of cobalt to a total number of moles of metal elements other than lithium in the second region is larger than a ratio of a number of moles of cobalt to a total number of moles of metal elements other than lithium in the first region.

公开(公告)号：US20220259066A1

公开(公告)日：2022-08-18

申请号：US17631317

申请日：2020-07-30

Applicant: NICHIA CORPORATION

Inventor： Yoshiteru MIYAMOTO ,  Taiga SHIRAISHI ,  Kenta KAWAI ,  Yasuhiro YOSHIDA ,  Masahiro MURAYAMA

IPC: C01G53/00 ,  H01M10/0525

Abstract: Provided is a positive electrode for an all-solid-state lithium ion secondary battery which can reduce the internal resistance of the all-solid-state lithium ion secondary battery. The positive electrode includes an active material layer containing a positive electrode active material and a solid electrolyte material. The positive electrode active material contains secondary particles comprising an aggregate of a plurality of primary particles containing a lithium transition metal composite oxide. A smoothness of the secondary particles is more than 0.73, and a degree of circularity of the secondary particles is more than 0.83.

公开(公告)号：US20180175389A1

公开(公告)日：2018-06-21

申请号：US15895562

申请日：2018-02-13

Applicant: NICHIA CORPORATION

Inventor： Hideaki YOSHIWARA ,  Tsutomu YAMADA ,  Masahiro MURAYAMA

IPC: H01M4/525 ,  H01M10/054 ,  C01G53/00 ,  C01G45/12 ,  C01G49/00 ,  C01G45/00 ,  C01G51/00 ,  H01M4/505

CPC classification number: H01M4/525 ,  C01G45/006 ,  C01G45/1228 ,  C01G49/0018 ,  C01G49/009 ,  C01G51/006 ,  C01G51/42 ,  C01G53/006 ,  C01G53/42 ,  C01P2002/72 ,  C01P2002/76 ,  C01P2006/40 ,  H01M4/505 ,  H01M10/054

Abstract: The present invention provides a positive-electrode active material for non-aqueous secondary battery comprising a sodium transition metal composite oxide represented by Formula: NaxFe1-yMyO2, wherein 0.4≤x≤0.7, 0.25≤y

公开(公告)号：US20240243274A1

公开(公告)日：2024-07-18

申请号：US18411642

申请日：2024-01-12

Applicant: NICHIA CORPORATION

Inventor： Sota SEKIGUCHI ,  Masahiro MURAYAMA ,  Rina OZAKI ,  Satoshi MATSUSHITA

IPC: H01M4/525 ,  H01M4/04 ,  H01M4/36 ,  H01M4/48 ,  H01M4/02

CPC classification number: H01M4/525 ,  H01M4/0404 ,  H01M4/366 ,  H01M4/48 ,  H01M2004/021 ,  H01M2004/028

Abstract: Provided is a method for producing a positive electrode for a nonaqueous electrolyte secondary battery, the method including obtaining a positive electrode active material having a volume-average particle size in a range of 1 m to 8 m and a specific surface area that is 1.4 m2/g or more from: particles containing a lithium transition metal composite oxide; and an aluminum compound having a volume-average particle size in a range of 1 nm to less than 500 nm, and obtaining a positive electrode active material layer by dispersing the positive electrode active material, a conduction aid, and a binder in a solvent to obtain a dispersion, applying the dispersion to the current collector, drying the dispersion, and subsequently compression-molding the dispersion and the current collector to have a density in a range of more than 2.6 g/cm3 and less than 2.8 g/cm3.

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：US20150004491A1

公开(公告)日：2015-01-01

申请号：US14316954

申请日：2014-06-27

Applicant: NICHIA CORPORATION

Inventor： Hideaki YOSHIWARA ,  Tsutomu YAMADA ,  Masahiro MURAYAMA

IPC: H01M4/525 ,  H01M4/505 ,  C01D1/02 ,  H01M10/054

CPC classification number: H01M4/525 ,  C01G45/006 ,  C01G45/1228 ,  C01G49/0018 ,  C01G49/009 ,  C01G51/006 ,  C01G51/42 ,  C01G53/006 ,  C01G53/42 ,  C01P2002/72 ,  C01P2002/76 ,  C01P2006/40 ,  H01M4/505 ,  H01M10/054

Abstract: The present invention provides a positive-electrode active material for non-aqueous secondary battery comprising a sodium transition metal composite oxide represented by Formula: NaxFe1-yMyO2, wherein 0.4≦x≦0.7, 0.25≦y

Abstract translation: 本发明提供一种非水二次电池用正极活性物质，其包含由式NaxFe1-yMyO2表示的钠过渡金属复合氧化物，其中，0.4≤n1E; x＆lt; l1; 0.7,0.25＆nlE; y <1.0，M为 至少一种选自锰，钴和镍的元素，钠过渡金属复合氧化物具有基本上由P63 / mmc组成的晶体结构。