公开(公告)号：US11670764B2

公开(公告)日：2023-06-06

申请号：US17019777

申请日：2020-09-14

Applicant: KABUSHIKI KAISHA TOSHIBA

Inventor： Hikaru Yoshikawa ,  Akira Yajima ,  Yasuaki Murashi ,  Naoki Nishio ,  Kazuhiro Namba ,  Natsuki Nakamura

IPC: H01M4/48 ,  H01M4/62 ,  H01M4/36 ,  H01M50/46 ,  H01M10/0525 ,  H01M10/05 ,  H01M4/02 ,  H01M50/466

CPC classification number: H01M4/481 ,  H01M4/364 ,  H01M4/483 ,  H01M4/624 ,  H01M10/05 ,  H01M10/0525 ,  H01M50/46 ,  H01M50/466 ,  H01M2004/021 ,  H01M2004/025 ,  H01M2004/027 ,  H01M2004/028

Abstract: According to a first embodiment, there is provided a positive electrode including a positive electrode active material-containing layer containing a first active material having a spinel type crystal structure. The positive electrode satisfies the formulas (1) to (3) when combined with a negative electrode including a negative electrode active material-containing layer containing a first active material having a spinel type crystal structure: 0.5≤a1/b1≤1.5 (1); 0.4≤a2/b2≤1.4 (2); and 0.5≤a3/b3≤2.3 (3), where a1 and b1 are a pore volume per 1 g weight, a2 and b2 are a pore specific surface area, and a3 and b3 are a median diameter in pore distribution, for the positive and negative electrode active material-containing layers, respectively.

公开(公告)号：US10910617B2

公开(公告)日：2021-02-02

申请号：US16387592

申请日：2019-04-18

Applicant: KABUSHIKI KAISHA TOSHIBA ,  Toshiba Infrastructure Systems & Solutions Corporation

Inventor： Kazuhiro Namba ,  Dai Yamamoto ,  Akira Yajima

IPC: H01M2/12 ,  H01M4/505 ,  H01M4/36 ,  H01M2/30 ,  H01M10/0569 ,  H01M4/131 ,  H01M2/02 ,  H01M10/052 ,  H01M4/62 ,  H01M4/48 ,  H01M4/485 ,  H01M4/13 ,  H01M4/02

Abstract: According to one embodiment, a nonaqueous electrolyte secondary battery is provided. The nonaqueous electrolyte secondary battery includes a container member, a negative electrode, a positive electrode, and a nonaqueous electrolyte. The container member is provided with a gas relief structure. The negative electrode includes a negative electrode mixture layer. The negative electrode mixture layer contains a titanium-containing oxide and Mn. Abundance ratios RTi, RMn, RA and RB obtained according to an X-ray photoelectron spectroscopy spectrum of the negative electrode mixture layer satisfy the following relational expressions: 0.01≤RMn/RTi≤0.2  (1); 3≤RA/RMn≤50  (2); and 0.5≤RA/RB≤5  (3).

公开(公告)号：US11239457B2

公开(公告)日：2022-02-01

申请号：US16361968

申请日：2019-03-22

Applicant: KABUSHIKI KAISHA TOSHIBA ,  Toshiba Infrastructure Systems & Solutions Corporation

Inventor： Ryo Hara ,  Dai Yamamoto ,  Kazuhiro Namba

IPC: H01M4/525 ,  H01M4/505 ,  H01M10/0525 ,  H01M4/131 ,  H01M4/36 ,  H01M4/485 ,  H01M4/1315

Abstract: According to one embodiment, provided is a nonaqueous electrolyte battery including a positive electrode, a negative electrode, and a nonaqueous electrolyte. The positive electrode includes a spinel type lithium-manganese composite oxide and a lithium cobalt oxide, which satisfy formula (1): 0.01≤B/(A+B)