公开(公告)号：US11626588B2

公开(公告)日：2023-04-11

申请号：US17269740

申请日：2019-02-27

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Yoshinori Aoki ,  Toshinobu Kanai ,  Takeshi Ogasawara

IPC: H01M4/131 ,  H01M4/525 ,  C01G53/00 ,  H01M4/505 ,  H01M4/02

Abstract: A positive electrode active material or non-aqueous electrolyte secondary batteries comprises a Co-containing lithium transition metal oxide containing Ni, Mn, and an arbitrary element and having a layered structure, wherein the content ratio of Ni in the lithium transition metal oxide is 75 to 95 mol %, the content ratio of Mn in the lithium transition metal oxide is equal to or greater than the content ratio of Co in the lithium transition metal oxide, the content ratio of Co in the lithium transition metal oxide is 0 to 2 mol %, the content ratio of a metal element other than Li in an Li layer in the layered structure is 1 to 2.5 mol %, and, in the lithium transition metal oxide, the half width n of a diffraction peak for (208) plane of an X-ray diffraction pattern as measured by X-ray diffraction is as follows: 0.30°≤n≤0.50°.

公开(公告)号：US20230072002A1

公开(公告)日：2023-03-09

申请号：US17792879

申请日：2020-12-01

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Katsuya Inoue ,  Takeshi Ogasawara ,  Yoshinori Aoki

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

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.

公开(公告)号：US20190190018A1

公开(公告)日：2019-06-20

申请号：US16326560

申请日：2017-08-22

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Yoshinori Aoki ,  Motoharu Saitou ,  Takeshi Ogasawara

IPC: H01M4/36 ,  H01M4/525 ,  H01M4/58 ,  H01M10/0525

CPC classification number: H01M4/366 ,  H01M4/36 ,  H01M4/525 ,  H01M4/5825 ,  H01M10/0525 ,  H01M2004/021 ,  H01M2004/028

Abstract: The present invention is directed to a positive electrode active material for non-aqueous electrolyte secondary batteries that can reduce direct-current resistance while it contains a nickel-containing lithium transition metal oxide with a high Ni content. The positive electrode active material contains lithium borate and a nickel-containing lithium transition metal oxide (Ni≥80 mol %) having a layered structure. The nickel-containing lithium transition metal oxide is composed of secondary particles formed by aggregation of primary particles. Lithium borate is attached to the surfaces of the primary particles. The proportion b of lithium borate with respect to the total molar amount of metal elements other than lithium in the nickel-containing lithium transition metal oxide is in the range of 0 mol %