公开(公告)号：US11522188B2

公开(公告)日：2022-12-06

申请号：US17028258

申请日：2020-09-22

Applicant: Panasonic Corporation ,  TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Takashi Ko ,  Shinya Suzuki ,  Fumiharu Niina ,  Sho Tsuruta ,  Natsumi Goto ,  Ryo Hanazaki

IPC: H01B1/08 ,  H01M4/505 ,  C01G53/00 ,  H01M4/525 ,  H01M4/36 ,  H01M10/0525 ,  H01M4/02

Abstract: 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：US12166207B2

公开(公告)日：2024-12-10

申请号：US17630362

申请日：2020-07-21

Applicant: Panasonic Corporation

Inventor： Shinya Suzuki ,  Takashi Ko ,  Fumiharu Niina ,  Sho Tsuruta ,  Katsunori Yanagida ,  Natsumi Goto

IPC: H01M4/525 ,  C01G53/00 ,  H01M4/36 ,  H01M4/505 ,  H01M10/0525 ,  H01M4/02

Abstract: 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：US11695115B2

公开(公告)日：2023-07-04

申请号：US17081310

申请日：2020-10-27

Applicant: Panasonic Corporation ,  TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Natsumi Goto ,  Takashi Ko ,  Shinya Suzuki ,  Fumiharu Niina ,  Sho Tsuruta ,  Ryo Hanazaki

IPC: H01M4/525 ,  H01M4/505 ,  H01M10/0525 ,  H01M4/36 ,  H01M4/02

CPC classification number: H01M4/525 ,  H01M4/364 ,  H01M4/505 ,  H01M10/0525 ,  H01M2004/021 ,  H01M2004/028

Abstract: 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

Applicant: Panasonic Corporation ,  TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Takashi Ko ,  Shinya Suzuki ,  Fumiharu Niina ,  Sho Tsuruta ,  Natsumi Goto ,  Ryo Hanazaki

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

Abstract: 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

Applicant: Panasonic Corporation

Inventor： Shinya Suzuki ,  Takashi Ko ,  Fumiharu Niina ,  Sho Tsuruta ,  Katsunori Yanagida ,  Natsumi Goto

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

Abstract: 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

Applicant: Panasonic Corporation ,  TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Natsumi Goto ,  Takashi Ko ,  Shinya Suzuki ,  Fumiharu Niina ,  Sho Tsuruta ,  Ryo Hanazaki

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

Abstract: 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

Applicant: Panasonic Corporation ,  TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Natsumi Goto ,  Takashi Ko ,  Shinya Suzuki ,  Fumiharu Niina ,  Sho Tsuruta ,  Ryo Hanazaki

IPC: H01M4/525 ,  H01M4/505 ,  H01M10/0525 ,  C01G53/00 ,  H01M4/02

Abstract: 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

Applicant: Panasonic Corporation

Inventor： Natsumi Goto ,  Takashi Ko ,  Shinya Suzuki ,  Fumiharu Niina ,  Sho Tsuruta

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

Abstract: 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：US20220285678A1

公开(公告)日：2022-09-08

申请号：US17637723

申请日：2020-08-25

Applicant: Panasonic Corporation

Inventor： Keiichi Takahashi ,  Fumiharu Niina ,  Shinya Suzuki

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

Abstract: A nonaqueous electrolyte secondary battery according to the present invention comprises a positive electrode that contains, as positive electrode active materials: a lithium transition metal composite oxide (A) that is configured of secondary particles, in each of which primary particles having an average particle diameter of 0.5 μm or more aggregate, or is configured of substantially one kind of particles, while having a volume-based D50 of from 0.6 μm to 3 μm; and a lithium transition metal composite oxide (B) that is configured of secondary particles, in each of which primary particles having an average particle diameter of 0.3 μm or less aggregate, while having a volume-based D50 of from 6 μm to 25 μm.

公开(公告)号：US20220278325A1

公开(公告)日：2022-09-01

申请号：US17637715

申请日：2020-08-25

Applicant: Panasonic Corporation

Inventor： Natsumi Goto ,  Takashi Ko ,  Shinya Suzuki ,  Fumiharu Niina ,  Sho Tsuruta

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

Abstract: This positive electrode active material for nonaqueous electrolyte secondary batteries is a positive electrode active material that comprises a lithium transition metal composite oxide containing at least 80 mol % Ni with reference to the total number of moles of metal elements excluding Li, and that has B present on the particle surface of at least this composite oxide. Assuming that a particle having a particle diameter larger than the 70% volume-based particle diameter (D70) is denoted as a first particle and a particle having a particle diameter smaller than the 30% volume-based particle diameter (D30) is denoted as a second particle, the mole fraction of B, with reference to the total number of moles of metal elements excluding Li, in the first particle is larger than the mole fraction of B, with reference to the total number of moles of metal elements excluding Li, in the second particle.