-
公开(公告)号：US20230207794A1
公开(公告)日：2023-06-29
申请号：US17926753
申请日：2021-04-20
Inventor： Katsuya Inoue , Takeshi Ogasawara , Yoshinori Aoki
IPC: H01M4/485 , H01M10/052
CPC classification number: H01M4/485 , H01M10/052 , H01M2004/028
Abstract: A positive electrode active material for nonaqueous electrolyte secondary batteries comprises a lithium transition metal composite oxide that has secondary particles each formed from aggregated primary particles and a surface modification layer that is formed on the surface of each of the primary particles of the lithium transition metal composite oxide, in which the lithium transition metal composite oxide contains at least Al and Ni in an amount of 80 mol % or more relative to the total number of moles of metal elements excluding Li, the surface modification layer contains W and at least one of Sr and Ca, and the content of W in the surface modification layer is 0.075 mol % or less relative to the total number of moles of the metal elements excluding Li in the lithium transition metal composite oxide.
-
公开(公告)号：US20250167244A1
公开(公告)日：2025-05-22
申请号：US18840213
申请日：2023-02-10
Inventor： Akihiro Kawakita , Masaki Deguchi , Katsuya Inoue , Takeshi Ogasawara
Abstract: The present invention provides a positive electrode active material which is capable of suppressing an increase in the direct-current resistance caused by repeated charging and discharging. This positive electrode active material, which is contained in nonaqueous electrolyte secondary batteries, contains a lithium-containing composite oxide that has a layered rock salt structure and a sulfonic acid compound that is present on the surface of the lithium-containing composite oxide; the lithium-containing composite oxide contains 25% by mole to 75% by mole of Ni, 15% by mole to 40% by mole of Co and 5% by mole to 50% by mole of Mn relative to the total number of moles of metal elements other than Li; and the sulfonic acid compound is represented by general formula I. (In the formula, A represents a group I element or a group 2 element; R represents a hydrocarbon group; and n is 1 or 2.)
-
公开(公告)号：US20230197948A1
公开(公告)日：2023-06-22
申请号：US17926419
申请日：2021-04-08
Inventor： Takaya Tochio , Katsuya Inoue , Takeshi Ogasawara , Yoshinori Aoki
IPC: H01M4/525 , H01M4/485 , H01M4/505 , H01M10/052
CPC classification number: H01M4/525 , H01M4/485 , H01M4/505 , H01M10/052 , H01M2004/028
Abstract: A positive electrode active material contains a lithium transition metal composite oxide that contains 85% by mole or more of Ni relative to the total number of moles of metal elements excluding Li and at least one metal element M1 that is selected from among Mg, Ti, Nb, Zr and V in an amount of 3% by mole or less relative to the total number of moles of metal elements excluding Li. The ratio of the concentration of metal element M1 contained in the shell of each primary particle of the composite oxide to the concentration of metal element M1 contained in the core is from 1.01 to 20; and at least one metal element M2 of Ca and Sr is on the surface of each primary particle in an amount of 1% by mole or less relative to the total number of moles of metal elements excluding Li.
-
公开(公告)号：US20220393165A1
公开(公告)日：2022-12-08
申请号：US17764004
申请日：2020-07-28
Inventor： Takaya Tochio , Katsuya Inoue , Takeshi Ogasawara
Abstract: This positive electrode has a positive electrode collector and a positive electrode mixture layer formed on the surface of the positive electrode collector. The positive electrode mixture layer contains a lithium transition metal composite oxide containing 85 mol % or more of Ni and 1-15 mol % inclusive of Al relative to the total number of moles of metal elements other than Li, and in which the total amount of Ni, Al, and Mn contained is 99.9 mol % or more. The density of the positive electrode active material in the positive electrode mixture layer is 3.45 g/cm3 or higher. In an observation of a cross-section of the positive electrode using a scanning electron microscope, the proportion of the cross-section area of the lithium transition metal composite oxide devoid of cracks relative to the cross-section area of the lithium transition metal composite oxide exposed on the cross-section is 51% or higher.
-
公开(公告)号：US20250167242A1
公开(公告)日：2025-05-22
申请号：US18837335
申请日：2023-02-09
Inventor： Masakazu Togo , Akihiro Kawakita , Katsuya Inoue , Takeshi Ogasawara , Masaki Deguchi
IPC: H01M4/62 , H01M4/02 , H01M4/525 , H01M10/0525
Abstract: This positive electrode active material comprises a lithium-containing composite oxide; the lithium-containing composite oxide contains at least Ni, Ca and Sr; the molar ratio (Ca/Sr ratio) of the content of Ca to the content of Sr is 1 or more; the sum of the content of Ca and the content of Sr in the lithium-containing composite oxide is 0.05% to 1% by mole; the lithium-containing composite oxide contains secondary particles, each of which is formed of aggregated primary particles; and a sulfonic acid compound which is represented by general formula I is present on the surfaces of the secondary particles or on the interfaces between the primary particles. (In the formula, A represents a group 1 element or a group 2 element; R represents a hydrocarbon group; and n is 1 or 2.)
-
Patent Agency Ranking
公开(公告)号：US20250038194A1
公开(公告)日：2025-01-30
申请号：US18712406
申请日：2022-10-24
Inventor： Akihiro Kawakita , Masaki Deguchi , Katsuya Inoue , Takeshi Ogasawara
IPC: H01M4/525 , H01M4/02 , H01M4/505 , H01M10/052 , H01M10/056
Abstract: Provided is a positive electrode active material having high capacity and reduced reaction resistance of a battery. This positive electrode active material for a non-aqueous electrolyte secondary battery includes a lithium-containing composite oxide that has a layered rock salt structure and a sulfonic acid compound present on the surface of the lithium-containing composite oxide, wherein: the lithium-containing composite oxide contains at least 85 mol % of Ni, at least 4 mol % of Al, and 0-1.5 mol % of Co relative to the total mole number of metal elements excepting Li; and the sulfonic acid compound is represented by general formula I. (In the formula, A is a group 1 element or a group 2 element, R is a hydrocarbon group, and n is 1 or 2.)
-
公开(公告)号：US20250038180A1
公开(公告)日：2025-01-30
申请号：US18712088
申请日：2022-10-24
Inventor： Akihiro Kawakita , Masaki Deguchi , Katsuya Inoue , Takeshi Ogasawara
Abstract: The present invention provides a positive electrode active material which has high capacity and improved initial charge and discharge efficiency. This positive electrode active material, which is contained in nonaqueous electrolyte secondary batteries, contains a lithium-containing composite oxide that has a layered rock salt structure and a sulfonic acid compound that is present on the surface of the lithium-containing composite oxide; the lithium-containing composite oxide contains 50% by mole or more of Ni, 0% by mole to 15% by mole of Co and 0% by mole to 4% by mole of Al relative to the total number of moles of metal elements other than Li; and the sulfonic acid compound is represented by general formula I. (In the formula, A represents a group 1 element or a group 2 element; R represents a hydrocarbon group; and n represents 1 or 2.)
-
公开(公告)号：US20240154108A1
公开(公告)日：2024-05-09
申请号：US18281096
申请日：2022-01-06
Inventor： Shinya Geshi , Katsuya Inoue , Takeshi Ogasawara
CPC classification number: H01M4/525 , H01M4/0404 , H01M4/364 , H01M4/625 , H01M2004/028
Abstract: This positive-electrode active material for non-aqueous electrolyte secondary batteries is provided with: an electrode assembly; a bottomed cylindrical exterior body having an outer diameter of 25 mm or more, that houses the electrode assembly and is connected to a negative electrode; and, a sealing body that seals an opening at the upper end of the exterior body and is connected to a positive electrode. The positive electrode includes a positive-electrode current collector, and a positive-electrode mixture layer formed on the surface of the positive-electrode current collector and containing a positive-electrode active material and an electroconductive agent. The positive-electrode active material includes a lithium-containing composite oxide having a chalcogen compound and/or a halogen compound adhered to the surface and a layered rock salt structure. Area basis weight of the positive-electrode mixture layer is 250 g/m2 or more. In the electrode assembly, three or more positive-electrode leads are led out.
-
公开(公告)号：US20230187629A1
公开(公告)日：2023-06-15
申请号：US17926448
申请日：2021-04-20
Inventor： Tomoo Takayama , Takaya Tochio , Katsuya Inoue , Takeshi Ogasawara
CPC classification number: H01M4/525 , C01G53/66 , H01M4/366 , H01M4/505 , C01P2006/40 , C01P2002/52 , C01P2004/50 , C01P2004/84 , C01P2002/74 , H01M2004/028
Abstract: This positive electrode material comprises a lithium transition metal complex oxide which contains at least 80 mol % Ni in terms of the total mol number of metal elements excluding Li, and which has a total Co content of less than 5 mol %. The lithium transition metal complex oxide is formed as secondary particles obtained by aggregating primary particles, wherein at least one element A selected from Ca and Sr is present on the surface of the primary particles in the amount of 0.01-1 mol %, inclusive, in terms of the total mol number of the metal elements excluding Li. In addition, at least one element B selected from B, Zr, W, Al, Nb, Mo, and Ti is present on the surface of the secondary particles in the amount of 0.05-2 mol %, inclusive, in terms of the total mol number of the Ni in the complex oxide.
-
公开(公告)号：US20230072002A1
公开(公告)日：2023-03-09
申请号：US17792879
申请日：2020-12-01
Inventor： Katsuya Inoue , Takeshi Ogasawara , Yoshinori Aoki
Abstract: This positive electrode active material for nonaqueous electrolyte secondary batteries contains: a lithium transition metal composite oxide having secondary particles, each of which is formed of aggregated primary particles; and a surface modification layer which is formed on the surface of each primary particle of the lithium transition metal composite oxide. The lithium transition metal composite oxide contains at least Al and 80% by mole or more of Ni relative to the total number of moles of the metal elements excluding Li; and the surface modification layer contains at least Ba, and at least one of Sr and Ca.
-
-
-
-
-
-
-
-
-
Search Results
21
records
(took 0.019 seconds)
