-
公开(公告)号：US11967701B2
公开(公告)日：2024-04-23
申请号：US17154455
申请日：2021-01-21
发明人： Ryo Hanazaki , Takashi Ko , Natsumi Goto , Sho Tsuruta , Kohei Kintsu
IPC分类号： H01M4/133 , C01B32/162 , H01M4/04 , H01M4/131 , H01M4/134 , H01M4/1391 , H01M4/1393 , H01M4/1395 , H01M4/36 , H01M4/02
CPC分类号： H01M4/133 , C01B32/162 , H01M4/0471 , H01M4/131 , H01M4/134 , H01M4/1391 , H01M4/1393 , H01M4/1395 , H01M4/364 , H01M2004/028
摘要： A positive electrode material consists of composite particles. Each of the composite particles includes a base material particle, a film, and a carbon nanotube. The film covers at least a part of a surface of the base material particle. The base material particle includes a positive electrode active material. The film includes a boron oxide. The carbon nanotube includes a first portion and a second portion. The first portion is buried in the film. The second portion is exposed on a surface of the film.
-
公开(公告)号：US11522188B2
公开(公告)日：2022-12-06
申请号：US17028258
申请日：2020-09-22
发明人： Takashi Ko , Shinya Suzuki , Fumiharu Niina , Sho Tsuruta , Natsumi Goto , Ryo Hanazaki
摘要： An advantage is to provide a non-aqueous electrolyte secondary battery with improved heat resistance. A positive electrode active material contains a lithium-transition metal composite oxide containing 80 mol % or more of Ni and 0.1 mol % to 1.5 mol % of B on the basis of the total number of moles of metal elements excluding Li, and B and at least one element (M1) selected from Groups 4 to 6 are present on at least the surfaces of particles of the composite oxide. When particles having a volume-based particle size larger than 70% particle size (D70) are first particles, and particles having a volume-based particle size smaller than 30% particle size (D30) are second particles, the molar fraction of M1 on the basis of the total number of moles of metallic elements excluding Li on the surfaces of the second particles is greater than that of the first particles.
-
公开(公告)号：US20210135213A1
公开(公告)日：2021-05-06
申请号：US17081020
申请日：2020-10-27
发明人： Natsumi Goto , Takashi Ko , Shinya Suzuki , Fumiharu Niina , Sho Tsuruta , Ryo Hanazaki
IPC分类号： H01M4/525 , H01M10/0525 , H01M4/505 , C01G53/00
摘要： A positive electrode active material for a non-aqueous electrolyte secondary battery according to a configuration includes a lithium-transition metal composite oxide containing nickel (Ni) in an amount of greater than or equal to 80 mol %, in which boron (B) is present at least on a particle surface of the lithium-transition metal composite oxide. In the lithium-transition metal composite oxide, when particles having a larger particle size than a volume-based 70% particle size (D70) are first particles and particles having a smaller particle size than a volume-based 30% particle size (D30) are second particles, a coverage ratio of B on surfaces of the first particles is larger than a coverage ratio of B on surfaces of the second particles by 5% or greater.
-
公开(公告)号：US11695115B2
公开(公告)日：2023-07-04
申请号：US17081310
申请日：2020-10-27
发明人： Natsumi Goto , Takashi Ko , Shinya Suzuki , Fumiharu Niina , Sho Tsuruta , Ryo Hanazaki
IPC分类号： H01M4/525 , H01M4/505 , H01M10/0525 , H01M4/36 , H01M4/02
CPC分类号： H01M4/525 , H01M4/364 , H01M4/505 , H01M10/0525 , H01M2004/021 , H01M2004/028
摘要： A positive electrode active material for a non-aqueous electrolyte secondary battery according to a configuration includes a lithium-transition metal composite oxide containing nickel (Ni) in an amount of greater than or equal to 80 mol %, in which boron (B) is present at least on a particle surface of the lithium-transition metal composite oxide. In the lithium-transition metal composite oxide, when particles having a larger particle size than a volume-based 70% particle size (D70) are first particles and particles having a smaller particle size than a volume-based 30% particle size (D30) are second particles, a coverage ratio of B on surfaces of the second particle is larger than a coverage ratio of B on surfaces of the first particle by 5% or greater.
-
公开(公告)号：US20210098786A1
公开(公告)日：2021-04-01
申请号：US17028258
申请日：2020-09-22
发明人： Takashi Ko , Shinya Suzuki , Fumiharu Niina , Sho Tsuruta , Natsumi Goto , Ryo Hanazaki
IPC分类号： H01M4/525 , H01M4/505 , H01M4/36 , H01M10/0525 , C01G53/00
摘要： An advantage is to provide a non-aqueous electrolyte secondary battery with improved heat resistance. A positive electrode active material contains a lithium-transition metal composite oxide containing 80 mol % or more of Ni and 0.1 mol % to 1.5 mol % of B on the basis of the total number of moles of metal elements excluding Li, and B and at least one element (M1) selected from Groups 4 to 6 are present on at least the surfaces of particles of the composite oxide. When particles having a volume-based particle size larger than 70% particle size (D70) are first particles, and particles having a volume-based particle size smaller than 30% particle size (D30) are second particles, the molar fraction of M1 on the basis of the total number of moles of metallic elements excluding Li on the surfaces of the second particles is greater than that of the first particles.
-
公开(公告)号：US20210135214A1
公开(公告)日：2021-05-06
申请号：US17081310
申请日：2020-10-27
发明人： Natsumi Goto , Takashi Ko , Shinya Suzuki , Fumiharu Niina , Sho Tsuruta , Ryo Hanazaki
IPC分类号： H01M4/525 , H01M4/505 , H01M10/0525
摘要： A positive electrode active material for a non-aqueous electrolyte secondary battery according to a configuration includes a lithium-transition metal composite oxide containing nickel (Ni) in an amount of greater than or equal to 80 mol %, in which boron (B) is present at least on a particle surface of the lithium-transition metal composite oxide. In the lithium-transition metal composite oxide, when particles having a larger particle size than a volume-based 70% particle size (D70) are first particles and particles having a smaller particle size than a volume-based 30% particle size (D30) are second particles, a coverage ratio of B on surfaces of the second particle is larger than a coverage ratio of B on surfaces of the first particle by 5% or greater.
-
公开(公告)号：US11626587B2
公开(公告)日：2023-04-11
申请号：US17081020
申请日：2020-10-27
发明人： Natsumi Goto , Takashi Ko , Shinya Suzuki , Fumiharu Niina , Sho Tsuruta , Ryo Hanazaki
IPC分类号： H01M4/525 , H01M4/505 , H01M10/0525 , C01G53/00 , H01M4/02
摘要： A positive electrode active material for a non-aqueous electrolyte secondary battery according to a configuration includes a lithium-transition metal composite oxide containing nickel (Ni) in an amount of greater than or equal to 80 mol %, in which boron (B) is present at least on a particle surface of the lithium-transition metal composite oxide. In the lithium-transition metal composite oxide, when particles having a larger particle size than a volume-based 70% particle size (D70) are first particles and particles having a smaller particle size than a volume-based 30% particle size (D30) are second particles, a coverage ratio of B on surfaces of the first particles is larger than a coverage ratio of B on surfaces of the second particles by 5% or greater.
-
公开(公告)号：US20210296638A1
公开(公告)日：2021-09-23
申请号：US17198878
申请日：2021-03-11
发明人： Kohei Kintsu , Takashi Ko , Natsumi Goto , Keiichi Takahashi , Fumiharu Niina , Sho Tsuruta , Ryo Hanazaki , Akira Tsujiko
IPC分类号： H01M4/36 , H01M4/525 , H01M4/62 , H01M10/052
摘要： Disclosed is a non-aqueous electrolyte secondary battery positive electrode that includes a positive electrode core and a positive electrode mixture layer disposed on the positive electrode core. The positive electrode mixture layer contains a positive electrode active material and carbon nanotubes. The positive electrode active material contains a lithium transition metal composite oxide (I) that either comprises secondary particles that are aggregates of primary particles having an average particle size of 1 μm or greater, or is substantially composed of single particles, the lithium transition metal composite oxide (I) having a volume-based median diameter of 0.6 μm to 6 μm, and a lithium transition metal composite oxide (II) that comprises secondary particles that are aggregates of primary particles having an average particle size of less than 1 μm, the lithium transition metal composite oxide (II) having a volume-based median diameter of 3 μm to 25 μm.
-
公开(公告)号：US20210234151A1
公开(公告)日：2021-07-29
申请号：US17154455
申请日：2021-01-21
发明人： Ryo Hanazaki , Takashi Ko , Natsumi Goto , Sho Tsuruta , Kohei Kintsu
IPC分类号： H01M4/133 , H01M4/131 , H01M4/134 , H01M4/1391 , H01M4/1395 , H01M4/1393 , H01M4/36 , C01B32/162 , H01M4/04
摘要： A positive electrode material consists of composite particles. Each of the composite particles includes a base material particle, a film, and a carbon nanotube. The film covers at least a part of a surface of the base material particle. The base material particle includes a positive electrode active material. The film includes a boron oxide. The carbon nanotube includes a first portion and a second portion. The first portion is buried in the film. The second portion is exposed on a surface of the film.
-
公开(公告)号：US20220367852A1
公开(公告)日：2022-11-17
申请号：US17763080
申请日：2020-08-28
发明人： Keiichi Takahashi , Fumiharu Niina , Natsumi Goto , Takashi Ko
IPC分类号： H01M4/36 , H01M10/0525 , H01M4/525 , H01M4/505
摘要： A nonaqueous electrolyte secondary battery comprises a positive electrode that contains, as positive electrode active materials: (A) a lithium transition metal composite oxide that has a volume-based D50 of 0.6 μm to 3 μm and that consists of secondary particles comprising aggregated primary particles with an average particle diameter of 0.5 um or more or is configured of substantially one kind of particle; and (B) a lithium transition metal composite oxide that has a volume-based D50 of 6 μm to 25 μm and that consists of secondary particles, comprising aggregated primary particles with an average particle diameter of 0.3 μm or less.
-
-
-
-
-
-
-
-
-
搜索结果
16 条记录 (耗时 0.018 秒)
