公开(公告)号：US11978897B2

公开(公告)日：2024-05-07

申请号：US17408910

申请日：2021-08-23

Applicant: KABUSHIKI KAISHA TOSHIBA

Inventor： Yasuhiro Harada ,  Yorikazu Yoshida ,  Kakuya Ueda ,  Norio Takami

IPC: H01M4/485 ,  H01M10/42 ,  H01M4/02

CPC classification number: H01M4/485 ,  H01M10/425 ,  H01M2004/021 ,  H01M2004/027 ,  H01M2004/028 ,  H01M2220/20

Abstract: According to one embodiment, an active material is provided. The active material includes an Nb2TiO7 phase and at least one Nb-rich phase selected from the group consisting of an Nb10Ti2O29 phase, an Nb14TiO37 phase, and an Nb24TiO64 phase. The active material includes potassium and phosphorus, and a total concentration of potassium and phosphorus in the active material is in the range of 0.01% by mass to 5.00% by mass. An average crystallite diameter is in the range of 80 nm to 150 nm. In a particle size distribution chart obtained by a laser diffraction scattering method, D10 is 0.3 μm or greater, and D90 is 10 μm or less. The active material satisfies a peak intensity ratio represented by the following Formula (1).

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公开(公告)号：US11894553B2

公开(公告)日：2024-02-06

申请号：US17186819

申请日：2021-02-26

Applicant: KABUSHIKI KAISHA TOSHIBA

Inventor： Kakuya Ueda ,  Yasunobu Yamashita ,  Keigo Hoshina ,  Tetsuya Sasakawa ,  Yasuhiro Harada ,  Norio Takami ,  Shinsuke Matsuno

IPC: H01M4/485 ,  H01M4/133 ,  H01M4/131 ,  H01M4/02 ,  H01M10/42

CPC classification number: H01M4/485 ,  H01M4/131 ,  H01M4/133 ,  H01M10/425 ,  H01M2004/021 ,  H01M2004/027 ,  H01M2004/028 ,  H01M2220/20

Abstract: According to one embodiment, an electrode is provided. The electrode includes a current collector, and an active material-containing layer which is formed on a surface of the current collector and includes a plurality of niobium titanium composite oxide particles. A X-ray diffraction pattern using a Cu-Kα ray source with respect to a surface of the active material-containing layer includes a peak A with a highest intensity in a range of 2θ=26°±0.2° and a peak B with a highest intensity in a range of 2θ=23.9°±0.2°. An intensity ratio (Ia/Ib) between an intensity Ia of the peak A and an intensity Ib of the peak B is in a range of 1.80 or more to 2.60 or less.