公开(公告)号：US20210005863A1

公开(公告)日：2021-01-07

申请号：US17024967

申请日：2020-09-18

Applicant: KABUSHIKI KAISHA TOSHIBA

Inventor： Toshitada NAKAZAWA ,  Dai YAMAMOTO ,  Masataka SHIKOTA ,  Aki HASEGAWA

IPC: H01M2/18 ,  H01M2/16 ,  H01M4/485 ,  H01M10/0525

Abstract: According to one embodiment, there is provided a nonaqueous electrolyte battery including a positive electrode, a negative electrode, a separator, and a nonaqueous electrolyte. The negative electrode includes a negative electrode material layer including a titanium-containing oxide. A logarithmic differential pore volume distribution curve of the separator obtained by a mercury intrusion method includes a first peak at which a pore diameter is in the range from 0.02 μm to 0.15 μm and second peak at which the pore diameter is in the range from 1.5 μm to 30 μm. A ratio P2I/P1I of a second peak intensity to a first peak intensity is more than 1.00 and not more than 3.00. The pore specific surface area of the separator is 70 m2/g or more.

公开(公告)号：US20190334148A1

公开(公告)日：2019-10-31

申请号：US16451837

申请日：2019-06-25

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

Inventor： Aki HASEGAWA ,  Dai YAMAMOTO ,  Masataka SHIKOTA ,  Toshitada NAKAZAWA

IPC: H01M2/16 ,  H01M10/052 ,  H01M4/505

Abstract: According to one embodiment, provided is a nonaqueous electrolyte battery that includes a positive electrode, a negative electrode, a separator, and a nonaqueous electrolyte. The separator is disposed between the positive electrode and the negative electrode. The separator includes a fiber-made nonwoven fabric having a tortuosity of 1.8 to 3 and a vacancy of 40% to 60%. The negative electrode has an operating potential of 0.7 V or more with respect to the potential of metallic lithium.