公开(公告)号：US11631845B2

公开(公告)日：2023-04-18

申请号：US17186707

申请日：2021-02-26

Applicant: KABUSHIKI KAISHA TOSHIBA

Inventor： Kazuomi Yoshima ,  Tomoe Kusama ,  Tetsuya Sasakawa ,  Yasuhiro Harada ,  Norio Takami

IPC: H01M4/36 ,  H01M4/66 ,  H01M10/0565 ,  H01M10/42 ,  H01M4/02

Abstract: According to one embodiment, a secondary battery includes a positive electrode including first vacancies, a negative electrode including second vacancies, and an electrolyte. The electrolyte includes a gel polymer portion and a liquid portion, and the gel polymer portion has a gel-part ratio within a range of from 20% to 80%. At least a part of the electrolyte is held in the first vacancies and the second vacancies. A first ratio r1 of the liquid portion to the gel polymer portion in the first vacancies is within a range of 0.01≤r1≤10. A second ratio r2 of the liquid portion to the gel polymer portion in the second vacancies is within a range of 0.01≤r2≤10.

公开(公告)号：US11462730B2

公开(公告)日：2022-10-04

申请号：US16804425

申请日：2020-02-28

Applicant: KABUSHIKI KAISHA TOSHIBA

Inventor： Tomoe Kusama ,  Tetsuya Sasakawa ,  Kazuomi Yoshima ,  Tomoko Sugizaki ,  Wen Zhang ,  Yasuhiro Harada ,  Norio Takami

IPC: H01M4/36 ,  H01M4/505 ,  H01M4/525 ,  H01M4/62 ,  H01M10/0525 ,  H01M10/42 ,  H01M4/02

Abstract: According to one embodiment, an electrode is provided. The active material-containing layer includes an active material, inorganic solid particles having lithium ion conductivity, and carbon fiber. A pore diameter DM at the first peak is 0.05 μm to 10 μm. A value SA−SB is 1.4 or more in a slope distribution curve of the active material-containing layer, where a vertical axis of the slope distribution curve represents a slope of a straight line passing through two adjacent measurement points on the log differential pore volume distribution curve and a horizontal axis of the slope distribution curve represents a smaller pore diameter of the two adjacent measurement points. The value SA−SB is obtained by subtracting a minimum slope value SB from a maximum slope value SA.

公开(公告)号：US11322742B2

公开(公告)日：2022-05-03

申请号：US16561885

申请日：2019-09-05

Applicant: KABUSHIKI KAISHA TOSHIBA

Inventor： Norio Takami ,  Keigo Hoshina ,  Mitsuru Ishibashi ,  Yoshihiko Nakano ,  Yasuhiro Harada

IPC: H01M4/485 ,  H01M4/62 ,  H01M10/42 ,  H01M4/36 ,  H01M10/0525 ,  B60L50/64 ,  C01G35/00 ,  B60L7/10

Abstract: According to one embodiment, provided is an active material including monoclinic niobium titanium composite oxide particles, and carbon fibers with which at least a part of surfaces of the monoclinic niobium titanium composite oxide particles is covered. The monoclinic niobium titanium composite oxide particles satisfy 1.5≤(α/β)≤2.5. The monoclinic niobium titanium composite oxide particles have an average primary particle size of 0.05 μm to 2 μm. The carbon fibers contain one or more metal elements selected from the group consisting of Fe, Co and Ni, and satisfy 1/10000≤(γ/σ)≤ 1/100. The carbon fibers have an average fiber diameter in the range of 5 nm to 100 nm.

公开(公告)号：US11309533B2

公开(公告)日：2022-04-19

申请号：US16802656

申请日：2020-02-27

Applicant: KABUSHIKI KAISHA TOSHIBA

Inventor： Yasuhiro Harada ,  Norio Takami ,  Kazuomi Yoshima ,  Yasunobu Yamashita

IPC: H01M4/131 ,  H01M50/20 ,  B60W30/18 ,  H01M4/36

Abstract: According to one embodiment, provided is a composite oxide containing lithium, niobium, and tantalum. A mass ratio of tantalum with respect to niobium is in a range of from 0.01% to 1.0%.

公开(公告)号：US11228031B2

公开(公告)日：2022-01-18

申请号：US16810916

申请日：2020-03-06

Applicant: KABUSHIKI KAISHA TOSHIBA

Inventor： Keigo Hoshina ,  Yasunobu Yamashita ,  Wen Zhang ,  Yasuhiro Harada ,  Norio Takami

IPC: H01M4/485 ,  H01M10/42 ,  H01M10/0525 ,  B60L50/64 ,  H01M4/02 ,  B60K1/04 ,  B60L7/10 ,  B60K6/28

Abstract: According to one embodiment, an electrode includes a current collector and an active material-containing layer. The active material-containing layer contains a titanium-niobium composite oxide. A cross-section of the active material-containing layer includes a first cross-section from the current collector to length 0.5t with respect to a thickness t of the active material-containing layer, and a second cross-section from length 0.5t to length t from the current collector. An area ratio S1 occupied by the titanium-niobium composite oxide within the first cross-section, and an area ratio S2 occupied by the titanium-niobium composite oxide within the second cross-section satisfy 0.8

公开(公告)号：US11211601B2

公开(公告)日：2021-12-28

申请号：US16296844

申请日：2019-03-08

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

Inventor： Keigo Hoshina ,  Wen Zhang ,  Yasuhiro Harada ,  Norio Takami

IPC: H01M4/36 ,  H01M4/131 ,  H01M4/485 ,  H01M4/505 ,  H01M4/62 ,  H01M10/0525 ,  H01M10/0566 ,  B82Y30/00

Abstract: According to one embodiment, an electrode is provided. The electrode includes an active material-containing layer. The active material-containing layer includes an active material and a conductive agent. The active material contains primary particles of a niobium-titanium composite oxide. The conductive agent contains fibrous carbon. The primary particles have an average particle size of 0.3 μm or more and 2 μm or less. At least a part of a surface of the primary particles is coated with the fibrous carbon. A covering ratio of the primary particles by the fibrous carbon is 0.01% or more and 40% or less.

公开(公告)号：US20210296684A1

公开(公告)日：2021-09-23

申请号：US17007038

申请日：2020-08-31

Applicant: KABUSHIKI KAISHA TOSHIBA

Inventor： Norio TAKAMI ,  Takashi Kishi ,  Yasuhiro Harada

IPC: H01M10/0562 ,  H01M10/0525 ,  H01M4/58 ,  H01M4/38

Abstract: According to one embodiment, a secondary battery includes a positive electrode, a negative electrode, a nonaqueous electrolyte and a separator. The positive electrode includes a halide including one or more metal elements selected from the group consisting of copper, iron, nickel, cobalt, tin, and zinc. The negative electrode includes one or more selected from the group consisting of lithium metal, a lithium alloy, and a compound capable of having Li inserted and extracted. The nonaqueous electrolyte contains aluminum ions. The separator has lithium ion conductivity and is interposed between the positive electrode and the negative electrode.

公开(公告)号：US11050048B2

公开(公告)日：2021-06-29

申请号：US15913336

申请日：2018-03-06

Applicant: KABUSHIKI KAISHA TOSHIBA

Inventor： Tomoe Kusama ,  Yasuhiro Harada ,  Kazuomi Yoshima ,  Norio Takami

IPC: H01M4/131 ,  H01M50/44 ,  H01M50/46 ,  H01M50/449 ,  H01M50/411 ,  H01M10/0525 ,  H01M10/44 ,  H01M4/02

Abstract: According to one embodiment, an electrode structure is provided. The electrode structure includes an electrode and a separator. The electrode includes an active material-containing layer. The active material-containing layer contains active material particles. The separator includes a layer of organic fibers and inorganic solid particles. The layer of organic fibers is on the active material containing layer. The inorganic solid particles are on the layer of organic fibers. The inorganic solid particles are disposed so as to be biased to a surface side opposite to an electrode side of the separator.

公开(公告)号：US10978752B2

公开(公告)日：2021-04-13

申请号：US16122126

申请日：2018-09-05

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

Inventor： Taro Fukaya ,  Takashi Kishi ,  Kazuki Ise ,  Kazuomi Yoshima ,  Yasunobu Yamashita ,  Yasuhiro Harada ,  Norio Takami

IPC: H01M10/00 ,  H01M10/44 ,  H01M4/66 ,  H01M10/42 ,  H01M10/0525 ,  H01M10/0567 ,  H01M4/36 ,  H01M4/485

Abstract: According to one embodiment, a secondary battery is provided. The secondary battery includes a negative electrode. The negative electrode includes an active material composite. The active material composite includes active material particles and a layer covering at least a portion of surfaces of the active material particles. The active material particles include titanium-containing oxide particles. The layer contains N and Si. The layer includes a first surface facing the at least the portion of surfaces of the active material particles and a second surface defining a layer thickness from the first surface. An N concentration in the layer decreases from the first surface to the second surface. A Si concentration in the layer increases from the first surface to the second surface.

公开(公告)号：US20200295363A1

公开(公告)日：2020-09-17

申请号：US16559260

申请日：2019-09-03

Applicant: KABUSHIKI KAISHA TOSHIBA

Inventor： Tetsuya Sasakawa ,  Yasuhiro Harada ,  Norio Takami

IPC: H01M4/505 ,  H01M4/525 ,  H01M4/131 ,  H01M10/0525 ,  H01M10/42 ,  H01M2/10 ,  B60L50/64 ,  B60L7/10

Abstract: According to one embodiment, there is provided an active material represented by a general formula Lix(NiaCobMncMd)1−s(Nb1−tTat)sO2. Here, M is at least one selected from the group consisting of Li, Ca, Mg, Al, Ti, V, Cr, Zr, Mo, Hf, and W, and 1.0≤x≤1.3, 0≤a≤0.9, 0≤b≤1.0, 0≤c≤0.8, 0≤d≤0.5, a+b+c+d=1, 0.005≤s≤0.3, and 0.0005≤t≤0.1 are satisfied.