公开(公告)号：US20230142602A1

公开(公告)日：2023-05-11

申请号：US17910974

申请日：2021-02-08

Applicant: SANYO Electric Co., Ltd.

Inventor： Ken Kaneko ,  Yuu Takanashi ,  Kentaro Takahashi

IPC: H01M10/052 ,  H01M4/36 ,  H01M4/525 ,  H01M4/505

CPC classification number: H01M10/052 ,  H01M4/364 ,  H01M4/525 ,  H01M4/505 ,  H01M2004/028

Abstract: This nonaqueous electrolyte secondary battery has a non-aqueous electrolyte and an electrode assembly formed by layering a positive electrode and a negative electrode layered via a separator. The positive electrode has a positive electrode core and a positive electrode mix layer containing a positive electrode active substance. The median diameter (D50) of the positive electrode active substance in terms of volume is 5.0 to 7.0 μm, the BET specific surface area of the positive electrode active substance is 2.00 to 3.00 m2/g, the TAP density of the positive electrode active substance is 1.30 to 1.70 g/cm3, and the density of the positive electrode mix layer is 2.3 to 2.5 g/cm3.

公开(公告)号：US12136698B2

公开(公告)日：2024-11-05

申请号：US17417495

申请日：2019-12-19

Applicant: SANYO Electric Co., Ltd.

Inventor： Yohei Tao ,  Ken Kaneko ,  Keisuke Minami ,  Toyoki Fujihara

IPC: H01M10/0567 ,  H01M4/02 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525 ,  H01M10/0587 ,  H01M50/409 ,  H01M50/489

Abstract: A non-aqueous electrolyte secondary battery including a positive electrode core; a positive electrode plate having a positive electrode active material layer formed on the positive electrode core; a negative electrode plate; a flat wound electrode assembly in which the positive electrode plate and the negative electrode plate are wound with a separator therebetween; and a non-aqueous electrolyte, wherein the positive electrode active material is a manganese-containing lithium transition metal composite oxide, the BET specific surface area of the positive electrode active material is 2.0-3.0 m2/g, the total surface area of the positive electrode active material contained in the positive electrode active material layer is 70-90 m2, and the value of A/B is 0.03-0.09 (μmol/m2), where A (μmol) is the total amount of FSO3 contained in the non-aqueous electrolyte, and B (m2) is the total area of the positive electrode active material contained in the positive electrode active material layer.

公开(公告)号：US20220115698A1

公开(公告)日：2022-04-14

申请号：US17417495

申请日：2019-12-19

Applicant: SANYO Electric Co., Ltd.

Inventor： Yohei Tao ,  Ken Kaneko ,  Keisuke Minami ,  Toyoki Fujihara

IPC: H01M10/0567 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0587 ,  H01M10/0525

Abstract: A non-aqueous electrolyte secondary battery including a positive electrode core; a positive electrode plate having a positive electrode active material layer formed on the positive electrode core; a negative electrode plate; a flat wound electrode assembly in which the positive electrode plate and the negative electrode plate are wound with a separator therebetween; and a non-aqueous electrolyte, wherein the positive electrode active material is a manganese-containing lithium transition metal composite oxide, the BET specific surface area of the positive electrode active material is 2.0-3.0 m2/g, the total surface area of the positive electrode active material contained in the positive electrode active material layer is 70-90 m2, and the value of A/B is 0.03-0.09 (μmol/m2), where A (μmol) is the total amount of FSO3 contained in the non-aqueous electrolyte, and B (m2) is the total area of the positive electrode active material contained in the positive electrode active material layer.