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：US20220006069A1

公开(公告)日：2022-01-06

申请号：US17289974

申请日：2019-10-23

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Tomohiro Harada

IPC: H01M4/131 ,  H01M10/0587 ,  H01M4/62 ,  H01M10/0525 ,  H01M4/525 ,  H01M4/505 ,  H01M4/38

Abstract: A secondary battery including a positive electrode including a positive electrode active material capable of electrochemically absorbing and releasing lithium ions, a negative electrode including a negative electrode active material capable of electrochemically absorbing and releasing lithium ions, a separator interposed between the positive and negative electrodes, and a non-aqueous electrolyte. The positive electrode includes a positive electrode material mixture containing the positive electrode active material and a positive electrode additive. The positive electrode additive includes a compound represented by LiaFexMyOz, where 0≤a≤5, 0≤x≤5, 0≤y≤1, and 0≤z≤4, with at least two of a, x, y and z being more than 0, and M includes at least one kind selected from the group consisting of Mn, Zn, Al, Ga, Ge, Ti, Si, Sn, Ce, Y, Zr, S, and Na.

公开(公告)号：US20210159536A1

公开(公告)日：2021-05-27

申请号：US16640159

申请日：2018-10-10

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Tomohiro Harada ,  Hiroshi Minami

IPC: H01M10/052 ,  H01M4/38 ,  H01M4/485 ,  H01M4/66 ,  H01M10/0587 ,  H01M4/04

Abstract: The nonaqueous electrolyte secondary battery comprises the following: a positive electrode including a positive electrode active material that includes a lithium-containing transition metal oxide, a negative electrode including a negative electrode current collector wherein lithium metal deposits on the negative electrode current collector during charging, a separator disposed between the positive electrode and the negative electrode, and a nonaqueous electrolyte. The molar ratio of the total amount of lithium held by the positive electrode and the negative electrode to the amount of transition metal in the positive electrode is not more than 1.1. In addition, in the discharged state, a space layer is present between the negative electrode and the separator, and the positive electrode capacity per unit area, α (mAh/cm2), of the positive electrode and the average in thickness, X (μm), of the space layer 50 satisfy 0.055≤α/X≤0.2.

公开(公告)号：US12113197B2

公开(公告)日：2024-10-08

申请号：US17289974

申请日：2019-10-23

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Tomohiro Harada

IPC: H01M4/131 ,  H01M4/02 ,  H01M4/38 ,  H01M4/505 ,  H01M4/525 ,  H01M4/62 ,  H01M10/0525 ,  H01M10/0587 ,  H01M50/469

CPC classification number: H01M4/131 ,  H01M4/386 ,  H01M4/505 ,  H01M4/525 ,  H01M4/621 ,  H01M10/0525 ,  H01M10/0587 ,  H01M50/469 ,  H01M2004/028

Abstract: A secondary battery including a positive electrode including a positive electrode active material capable of electrochemically absorbing and releasing lithium ions, a negative electrode including a negative electrode active material capable of electrochemically absorbing and releasing lithium ions, a separator interposed between the positive and negative electrodes, and a non-aqueous electrolyte. The positive electrode includes a positive electrode material mixture containing the positive electrode active material and a positive electrode additive. The positive electrode additive includes a compound represented by LiaFexMyOz, where 0≤a≤5, 0≤x≤5, 0≤y≤1, and 0≤z≤4, with at least two of a, x, y and z being more than 0, and M includes at least one kind selected from the group consisting of Mn, Zn, Al, Ga, Ge, Ti, Si, Sn, Ce, Y, Zr, S, and Na.

公开(公告)号：US20240162415A1

公开(公告)日：2024-05-16

申请号：US18284686

申请日：2022-03-30

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Kosuke Kuroda ,  Youichirou Uka ,  Koh Masahara ,  Rina Yamamoto ,  Tomohiro Harada

IPC: H01M4/36 ,  H01M4/02 ,  H01M4/13 ,  H01M4/525 ,  H01M4/583 ,  H01M4/62 ,  H01M4/66

CPC classification number: H01M4/364 ,  H01M4/525 ,  H01M4/583 ,  H01M4/623 ,  H01M2004/028 ,  H01M4/13 ,  H01M4/661

Abstract: A disclosed positive electrode for a nonaqueous electrolyte secondary battery includes a positive-electrode current collector and a positive-electrode mixture layer on a surface of the positive-electrode current collector. The positive-electrode mixture layer includes a positive-electrode active material, a conductive material, and binders. The binders include a polyvinylpyrrolidone-based compound and a cellulose derivative.

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：US20220352513A1

公开(公告)日：2022-11-03

申请号：US17764789

申请日：2020-09-03

Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

Inventor： Tomohiro Harada ,  Rina Yamamoto

IPC: H01M4/525 ,  H01M4/62 ,  H01M4/505 ,  H01M4/36 ,  H01M10/0525

Abstract: A positive electrode for a nonaqueous electrolyte secondary battery includes a positive electrode mixture layer, wherein the positive electrode mixture layer includes a positive electrode active material, a first binder, and a second binder; the positive electrode active material includes a composite oxide represented by the following formula (1): LiaNixCoyMe(1-x-y)O2 (1), where 0.97≤a≤1.2, 0.5≤x≤1, and 0≤y≤0.1; the element Me is at least one selected from the group consisting of Al, Mn, B, W, Sr, Mg, Mo, Nb, Ti, Si, and Zr; the first binder is a polymeric binder comprising at least a vinylidene fluoride unit; the second binder is a polymeric binder comprising at least a diene unit; and a ratio of the second binder to a total amount of the first binder and the second binder is 5 mass % or more and 35 mass % or less.