公开(公告)号：US20230411694A1

公开(公告)日：2023-12-21

申请号：US18037578

申请日：2021-11-30

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Noriko Fukamichi ,  Tomohiro Harada ,  Takeshi Ogasawara ,  Daizo Jito

IPC: H01M10/0568 ,  H01M4/36 ,  H01M4/525 ,  H01M4/48 ,  H01M4/587 ,  H01M10/0525

CPC classification number: H01M10/0568 ,  H01M4/364 ,  H01M4/525 ,  H01M4/483 ,  H01M4/587 ,  H01M10/0525 ,  H01M2300/0025

Abstract: This non-aqueous electrolyte secondary battery, which is one example of an embodiment, comprises: a positive electrode that has a positive electrode mixture layer; a negative electrode; and a non-aqueous electrolyte. The positive electrode mixture layer contains a first lithium-and-transition-metal composite oxide represented by general formula LixNi1-y-zCoyMzO2 (in the formula, 0.8≤x≤1.2, 0≤y≤0.2, 0

公开(公告)号：US20240006603A1

公开(公告)日：2024-01-04

申请号：US18037880

申请日：2021-11-30

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Tomohiro Harada ,  Noriko Fukamichi ,  Takeshi Ogasawara ,  Daizo Jito

IPC: H01M4/525 ,  H01M10/052 ,  H01M4/62 ,  H01M4/36

CPC classification number: H01M4/525 ,  H01M10/052 ,  H01M4/625 ,  H01M4/364 ,  H01M2004/028

Abstract: The positive electrode mixture layer of this nonaqueous electrolyte secondary battery positive electrode, which is one exemplary embodiment, contains a first lithium-transition-metal composite oxide represented by general formula LixNi1−y−zCoyMzO2 (in the formula. 0.8≤x≤1.2, 0≤y≤0.2, 0

公开(公告)号：US20230335711A1

公开(公告)日：2023-10-19

申请号：US18027270

申请日：2021-08-18

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Daizo Jito ,  Tomohiro Harada ,  Noriko Fukamichi ,  Takeshi Ogasawara

IPC: H01M4/36 ,  H01M4/525 ,  H01M4/38

CPC classification number: H01M4/364 ,  H01M4/525 ,  H01M4/366 ,  H01M4/38 ,  H01M2004/028

Abstract: A positive electrode active material according to the present invention contains first and second lithium-transition metal complex oxides at respective predetermined proportions. The first lithium-transition metal complex oxide includes a core containing at least Li, Ni, and M1 (M1 is at least one element selected from the group consisting of Mn, W, Mg, Mo, Nb, Ti, Si, and Al), and a surface modification layer that is present at least on the surface of the core. The surface modification layer includes M2 (M2 is at least one element selected from the group consisting of Sr, Ca, W, Mg, Nb, and Al). The second lithium-transition metal complex oxide includes at least a compound represented by general formula LiaNibM31-bO2 (in the formula. 1.5≤a≤2.5 and 0.95≤b≤1 are satisfied, and M3 is at least one element selected from the group consisting of Cu, Sr, Ca, Nb, Si, and Al).

公开(公告)号：US20240356019A1

公开(公告)日：2024-10-24

申请号：US18580826

申请日：2022-07-15

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Daizo Jito ,  Takeshi Ogasawara

IPC: H01M4/525 ,  H01M4/02 ,  H01M4/36 ,  H01M4/62

CPC classification number: H01M4/525 ,  H01M4/364 ,  H01M4/366 ,  H01M4/628 ,  H01M2004/028

Abstract: The present invention provides a positive electrode active material which is capable of improving the battery capacity. A positive electrode active material for nonaqueous electrolyte secondary batteries according to one embodiment of the present disclosure contains a first lithium transition metal composite oxide that is represented by general formula LiaNibM11-bO2 (wherein 1.5≤a≤2.5; 0.95≤b≤1.00; and M1 represents at least one element that is selected from among Cu, Sr, Ca, Nb, Si and Al); the first lithium transition metal composite oxide has voids inside; and the void fraction of the first lithium transition metal composite oxide is 2% to 10%.

公开(公告)号：US20240006651A1

公开(公告)日：2024-01-04

申请号：US18037883

申请日：2021-11-30

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Noriko Fukamichi ,  Tomohiro Harada ,  Takeshi Ogasawara ,  Daizo Jito

IPC: H01M10/052 ,  H01M4/525 ,  H01M4/583 ,  H01M50/431 ,  H01M50/42 ,  H01M50/451

CPC classification number: H01M10/052 ,  H01M4/525 ,  H01M4/583 ,  H01M50/431 ,  H01M50/42 ,  H01M50/451 ,  H01M2300/0037 ,  H01M10/0567

Abstract: This non-aqueous electrolyte secondary battery, which is one example of an embodiment, comprises: a positive electrode that has a positive electrode mixture layer; a negative electrode; a separator that is interposed between the positive electrode and the negative electrode; and a non-aqueous electrolyte. The positive electrode mixture layer contains a first lithium-and-transition-metal composite oxide represented by general formula LixNi1−y−zCoyMzO2 (in the formula, 0.8≤x≤1.2, 0≤y≤0.2, 0

公开(公告)号：US20200036005A1

公开(公告)日：2020-01-30

申请号：US16496760

申请日：2018-02-13

Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

Inventor： Daizo Jito ,  Takeshi Ogasawara ,  Akihiro Kawakita ,  Motoharu Saito

IPC: H01M4/525 ,  H01M4/36

Abstract: A positive electrode active material for a non-aqueous-electrolyte secondary battery contains a nickel-containing lithium transition metal oxide and is a primary particle alone of a lithium transition metal oxide that contains nickel in an amount of 80 mol % or more relative to the whole molar quantity of a metal element other than lithium or a secondary particle formed by aggregation of two to five particles. A rare earth compound and a magnesium compound adhere to the surface of the primary particle alone or the secondary particle.

公开(公告)号：US20250096239A1

公开(公告)日：2025-03-20

申请号：US18730957

申请日：2023-01-16

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Daizo Jito ,  Akihiro Kawakita ,  Masaki Deguchi ,  Katsuya Inoue ,  Takeshi Ogasawara

IPC: H01M4/36 ,  H01M4/131 ,  H01M4/525 ,  H01M4/62 ,  H01M10/052

Abstract: A positive electrode active material which is to be included in this nonaqueous electrolyte secondary battery and contains a lithium-containing complex oxide having a prescribed composition which has a layered evaporitic structure, wherein: the lithium-containing complex oxide contains secondary particles formed by clumping primary particles with one another; and a sulfonic acid compound represented by general formula I, one or more types of element selected from Ca and Sr, and one or more types of element selected from W, Mo, Ti, Si, Nb and Zr are present on the surface of the secondary particles or at the interface between the primary particles. (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：US20230395785A1

公开(公告)日：2023-12-07

申请号：US18266957

申请日：2021-12-15

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Daizo Jito ,  Tomohiro Harada ,  Noriko Fukamichi ,  Takeshi Ogasawara

IPC: H01M4/36 ,  H01M4/525 ,  H01M10/052

CPC classification number: H01M4/364 ,  H01M4/525 ,  H01M10/052 ,  H01M2004/028

Abstract: A positive electrode active material for a non-aqueous electrolyte secondary battery according to one exemplary embodiment comprises: a first lithium transition metal composite oxide represented by general formula LiaNibM11-bO2 (in the formula, 1.5≤a≤2.5, 0.95≤b≤1.00, and M1 is at least one metal element excluding Li and Ni); and a second lithium transition metal composite oxide represented by general formula LicNi2-c-dM2dO2 (in the formula, 0

公开(公告)号：US20210288305A1

公开(公告)日：2021-09-16

申请号：US16323371

申请日：2017-07-26

Applicant: Panasonic Intellectual Property MAnagement Co., Ltd.

Inventor： Daizo Jito ,  Takeshi Ogasawara

IPC: H01M4/131 ,  H01M4/134 ,  H01M4/525 ,  H01M4/505 ,  H01M4/1391 ,  H01M4/1395 ,  H01M4/04 ,  H01M10/0525

Abstract: An object of the invention is to provide a positive electrode active material for nonaqueous electrolyte secondary batteries that prevents low capacity recovery after high-temperature storage. A nonaqueous electrolyte secondary battery according to the present invention includes secondary particles of a lithium transition metal oxide resulting from the aggregation of primary particles of the oxide, secondary particles of a rare earth compound resulting from the aggregation of primary particles of the compound, and a magnesium compound. The secondary particles of the rare earth compound are adhering to depressions formed between adjacent primary particles of the lithium transition metal oxide on the surface of the secondary particles of the lithium transition metal oxide and also to each of the primary particles forming the depressions. The magnesium compound is adhering to the surface of the secondary particles of the lithium transition metal oxide.

公开(公告)号：US11094924B2

公开(公告)日：2021-08-17

申请号：US15735819

申请日：2016-07-28

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Daizo Jito ,  Akihiro Kawakita ,  Takeshi Ogasawara

IPC: H01M4/00 ,  H01M4/36 ,  H01M4/485 ,  H01M4/525

Abstract: An object of the present invention is to provide a nonaqueous electrolyte secondary battery that can attain a smaller increase in direct current resistance after charge discharge cycles. An aspect of the invention resides in a nonaqueous electrolyte secondary battery wherein a positive electrode active material includes a secondary particle formed by aggregation of primary particles of a lithium transition metal oxide, and a secondary particle formed by aggregation of primary particles of a rare earth compound. On a surface of the secondary particle of the lithium transition metal oxide, the secondary particle of the rare earth compound is attached to a recess formed between adjacent primary particles of the lithium transition metal oxide in such a manner that the secondary particle of the rare earth compound is attached to each of the primary particles forming the recess. The lithium transition metal oxide includes magnesium dissolved therein.