公开(公告)号：US20230299345A1

公开(公告)日：2023-09-21

申请号：US17822193

申请日：2022-08-25

Applicant: KABUSHIKI KAISHA TOSHIBA

Inventor： Yuiko KOITABASHI ,  Kazuomi YOSHIMA ,  Asato KONDO ,  Sayaka MORIMOTO ,  Tetsuya SASAKAWA

IPC: H01M10/0567 ,  H01M50/204 ,  H01M50/249 ,  H01M50/284 ,  H01M10/0525 ,  H01M4/485 ,  H01M4/62 ,  H01M50/296

CPC classification number: H01M10/0567 ,  H01M50/204 ,  H01M50/249 ,  H01M50/284 ,  H01M10/0525 ,  H01M4/485 ,  H01M4/62 ,  H01M50/296 ,  H01M2220/20 ,  H01M2300/0025 ,  H01M2004/027

Abstract: In general, according to one embodiment, a secondary battery includes a positive electrode and a nonaqueous electrolyte. The positive electrode includes a sulfur-containing layer provided on at least a part of a positive electrode active material-containing layer. The nonaqueous electrolyte includes a sulfur-containing compound consisting of at least one of a sulfur-containing imide compound or a sultone compound, or consisting of at least one of a sulfur-containing imide compound, a sultone compound or a propanesulfonic acid ester. The secondary battery satisfies 1×10−6≤E/A≤9×10−4. A denotes a mass of sulfur atoms per unit volume (g/m3) of the sulfur-containing layer. E denotes a concentration (mol/L) of the sulfur-containing compound in the nonaqueous electrolyte.

公开(公告)号：US20250038257A1

公开(公告)日：2025-01-30

申请号：US18442196

申请日：2024-02-15

Applicant: KABUSHIKI KAISHA TOSHIBA

Inventor： Yuiko KOITABASHI ,  Sayaka MORIMOTO ,  Asato KONDO ,  Tetsuya SASAKAWA

IPC: H01M10/0567 ,  H01M4/02 ,  H01M4/04 ,  H01M4/485 ,  H01M4/505 ,  H01M4/525 ,  H01M4/62 ,  H01M4/66 ,  H01M10/0568

Abstract: In general, according to one embodiment, a secondary battery including a positive electrode, a negative electrode, and a nonaqueous electrolyte is provided. The positive electrode includes a positive electrode mixture layer containing a positive electrode active material and sulfur atoms. A mass of sulfur atoms per unit volume of the positive electrode mixture layer is 430 g/m3 or less. The nonaqueous electrolyte contains propanesultone and lithium difluorophosphate. A concentration of the propanesultone in the nonaqueous electrolyte is 0.5% by mass or more. A concentration of the lithium difluorophosphate in the nonaqueous electrolyte is 0.2% by mass or more.

公开(公告)号：US20230411612A1

公开(公告)日：2023-12-21

申请号：US18172864

申请日：2023-02-22

Applicant: KABUSHIKI KAISHA TOSHIBA

Inventor： Tetsuya SASAKAWA ,  Kazuomi YOSHIMA ,  Sayaka MORIMOTO

IPC: H01M4/485 ,  H01M4/48 ,  H01M4/62 ,  H01M4/131

CPC classification number: H01M4/485 ,  H01M4/483 ,  H01M4/622 ,  H01M4/131 ,  H01M2004/027

Abstract: In general, according to one embodiment, an electrode material is provided. The electrode material includes at least one of niobium titanium oxide or titanium dioxide. A moisture content measured by a Karl Fischer method is in a range of 2000 ppm or more and 10,000 ppm or less.

公开(公告)号：US20230296527A1

公开(公告)日：2023-09-21

申请号：US17887582

申请日：2022-08-15

Applicant: KABUSHIKI KAISHA TOSHIBA

Inventor： Mitsuhiro OKI ,  Sayaka MORIMOTO

IPC: G01N21/78

CPC classification number: G01N21/78

Abstract: A method of analyzing an antimony ion of an embodiment, the method includes using a first analysis solution or a second analysis solution, the first analysis solution containing trivalent antimony ions and pentavalent antimony ions, the second analysis solution being a solution obtained by mixing a first acid and the first analysis solution, and mixing the first analysis solution or the second analysis solution with a second acid to obtain a third analysis solution in which the pentavalent antimony ions are chlorinated and which contains [SbCl6]− ions, mixing the third analysis solution and a first organic solvent and phase-separating the mixture into a fourth analysis solution as an organic phase and an aqueous phase to obtain the fourth analysis solution, mixing the fourth analysis solution and a coloring liquid containing rhodamine B to obtain a fifth analysis solution, and evaluating a concentration of the pentavalent antimony ions in the first analysis solution from color of the fifth analysis solution. A total concentration of nitric acid, cerium (IV) nitrate, and cerium (IV) sulfate contained in the first analysis solution is 0.00 mol/L or more and 0.1 mol/L or less. The total concentration of nitric acid, cerium (IV) nitrate, and cerium (IV) sulfate contained in the first acid is 0.00 mol/L or more and 0.1 mol/L or less. The total concentration of nitric acid, cerium (IV) nitrate, and cerium (IV) sulfate contained in the second acid is 0.00 mol/L or more and 0.1 mol/L or less.

公开(公告)号：US20240322222A1

公开(公告)日：2024-09-26

申请号：US18485357

申请日：2023-10-12

Applicant: KABUSHIKI KAISHA TOSHIBA

Inventor： Yuiko KOITABASHI ,  Tetsuya SASAKAWA ,  Hirofumi YASUMIISHI ,  Mitsuhiro OKI ,  Sayaka MORIMOTO

IPC: H01M10/0562 ,  B60L7/10 ,  H01M50/204 ,  H01M50/574

CPC classification number: H01M10/0562 ,  B60L7/10 ,  H01M50/204 ,  H01M50/574 ,  B60L50/64 ,  H01M2220/20 ,  H01M2300/0068

Abstract: In general, according to one embodiment, an electrode is provided. The electrode includes an active material and a titanium-containing solid electrolyte. The active material includes a transition metal oxide. In an X-ray absorption fine structure spectrum of Ti—K absorption edge for the electrode in a discharged state, a first X-ray absorption amount I at a first incident X-ray energy satisfies 0.2≤I≤0.6. In an X-ray absorption fine structure spectrum of Ti—K absorption edge for anatase titanium dioxide, a second X-ray absorption amount at a second incident X-ray energy is equal to the first X-ray absorption amount I. The first incident X-ray energy is higher than the second incident X-ray energy.

公开(公告)号：US20240322185A1

公开(公告)日：2024-09-26

申请号：US18488461

申请日：2023-10-17

Applicant: KABUSHIKI KAISHA TOSHIBA

Inventor： Hirofumi YASUMIISHI ,  Tetsuya SASAKAWA ,  Yuiko KOITABASHI ,  Sayaka MORIMOTO

IPC: H01M4/62 ,  B60L3/00 ,  H01M4/36 ,  H01M4/485 ,  H01M10/42 ,  H01M50/204 ,  H01M50/249 ,  H01M50/296

CPC classification number: H01M4/628 ,  B60L3/0046 ,  H01M4/366 ,  H01M4/485 ,  H01M10/425 ,  H01M50/204 ,  H01M50/249 ,  H01M50/296 ,  B60L7/10 ,  H01M2004/021 ,  H01M2004/027 ,  H01M2220/20 ,  H02P3/14

Abstract: In general, according to an embodiment, an electrode is provided. The electrode includes: inorganic particles; niobium titanium oxide particles; and an inorganic particle-containing layer covering at least a part of surfaces of the niobium titanium oxide particles. An average particle size of the inorganic particles is larger than a thickness of the inorganic particle-containing layer.