-
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：US20220271284A1
公开(公告)日：2022-08-25
申请号：US17630362
申请日：2020-07-21
发明人： Shinya Suzuki , Takashi Ko , Fumiharu Niina , Sho Tsuruta , Katsunori Yanagida , Natsumi Goto
IPC分类号： H01M4/525 , H01M10/0525 , H01M4/505 , C01G53/00
摘要： A positive electrode active material for nonaqueous electrolyte secondary batteries contains a lithium transition metal composite oxide that contains not less than 80% by mole of Ni relative to the total number of moles of metal elements other than Li; and Ti is present at least in the surfaces of particles of the composite oxide. With respect to this positive electrode active material, if particles having a volume-based particle diameter more than the 70% particle diameter (D70) are taken as first particles and particles having a volume-based particle diameter less than the 30% particle diameter (D30) are taken as second particles, the molar fraction (A2) of Ti relative to the total number of moles of metal elements in the surfaces of the second particles is higher than the molar fraction (A1) of Ti relative to the total number of moles of metal elements in the surfaces 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：US20220320490A1
公开(公告)日：2022-10-06
申请号：US17640249
申请日：2020-08-28
发明人： Natsumi Goto , Takashi Ko , Shinya Suzuki , Fumiharu Niina , Sho Tsuruta
摘要： This positive electrode active material for a nonaqueous electrolyte secondary battery includes a lithium transition metal composite oxide that contains at least 80 mol % of Ni with respect to the total number of moles of metal elements excluding Li. B is present at least on the surfaces of the particles of the composite oxide. When particles having a particle diameter larger than a volume-based particle diameter of 70% (D70) are defined as first particles and particles having a particle diameter smaller than a volume-based particle diameter of 30% (D30) are defined as second particles, the molar fraction of B with respect to the total number of moles of metal elements excluding Li in the second particles is higher than the molar fraction of B with respect to the total number of moles of metal elements excluding Li in the first particles.
-
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：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.
-
-
-
-
-
-
-
-
-
搜索结果
15 条记录 (耗时 0.015 秒)
