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1.
公开(公告)号:US09856148B2
公开(公告)日:2018-01-02
申请号:US14911132
申请日:2014-08-14
申请人: National Institute of Advanced Industrial Science and Technology , ISHIHARA SANGYO KAISHA, LTD.
发明人: Hideaki Nagai , Junji Akimoto , Kunimitsu Kataoka , Yoshimasa Kumashiro , Tomoyuki Sotokawa , Nobuharu Koshiba
IPC分类号: C01G23/00 , C01G23/047 , H01M4/485
CPC分类号: C01G23/005 , C01G23/00 , C01G23/047 , C01P2002/72 , C01P2004/03 , C01P2004/32 , C01P2004/61 , C01P2004/62 , C01P2006/12 , C01P2006/14 , C01P2006/16 , C01P2006/40 , H01M4/485
摘要: Provided are: an alkali metal titanium oxide having a uniform composition and that is such that there are no residual by-products having a different composition or unreacted starting materials; and a method for producing a titanium oxide and proton exchange body obtained by processing the alkali metal titanium oxide. The method produces an alkali metal titanium oxide by firing the result of impregnating the surface and inside of pores of porous titanium compound particles with an aqueous solution of an alkali metal-containing component. The alkali metal titanium oxide is subjected to proton exchange, and with the proton exchange body of the alkali metal titanium oxide as the starting material, the titanium oxide is produced through a heat processing step.
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公开(公告)号:US10693184B2
公开(公告)日:2020-06-23
申请号:US15329750
申请日:2015-07-30
发明人: Kunimitsu Kataoka , Junji Akimoto
IPC分类号: H01M10/0562 , H01M10/0525 , C01G25/00 , C30B13/28 , C30B29/22 , C30B15/20
摘要: Provided is a high-density lithium-containing garnet crystal body. The lithium-containing garnet crystal body has a relative density of 99% or more, belongs to a tetragonal system, and has a garnet-related type structure. A method of producing a Li7La3Zr2O12 crystal, which is one example of this lithium-containing garnet crystal body, includes melting a portion of a rod-like raw material composed of polycrystalline Li7La3Zr2O12 belonging to a tetragonal system while rotating it on a plane perpendicular to the longer direction and moving the melted portion in the longer direction. The moving rate of the melted portion is preferably 8 mm/h or more but not more than 19 mm/h. The rotational speed of the raw material is preferably 30 rpm or more but not more than 60 rpm. By increasing the moving rate of the melted portion, decomposition of the raw material due to evaporation of lithium can be prevented and by increasing the rotational speed of the raw material, air bubbles can be removed.
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公开(公告)号:US10319985B2
公开(公告)日:2019-06-11
申请号:US15522654
申请日:2015-10-23
发明人: Kunimitsu Kataoka , Junji Akimoto
IPC分类号: H01B1/06 , H01B1/08 , C01G35/00 , C30B29/22 , H01B13/00 , H01M4/131 , H01M10/052 , H01M10/0525 , H01M10/0562
摘要: There are provided a lithium-containing garnet crystal high in density and ionic conductivity, and an all-solid-state lithium ion secondary battery using the lithium-containing garnet crystal. The lithium-containing garnet crystal has a chemical composition represented by Li7-xLa3Zr2-xTaxO12 (0.2≤x≤1), and has a relative density of 99% or higher, belongs to a cubic system, and has a garnet-related structure. The lithium-containing garnet crystal has a lithium ion conductivity of 1.0×10−3 S/cm or higher. Further, this solid electrolyte material has a lattice constant a of 1.28 nm≤a≤1.30 nm, and lithium ions occupy 96h-sites in the crystal structure. The all-solid-state lithium ion secondary battery has a positive electrode, a negative electrode and a solid electrolyte, and the solid electrolyte is constituted of the lithium-containing garnet crystal according to the present invention.
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4.
公开(公告)号:US10763544B1
公开(公告)日:2020-09-01
申请号:US16304231
申请日:2017-05-02
发明人: Naoki Hamao , Kunimitsu Kataoka , Junji Akimoto
IPC分类号: H01M10/0562 , H01M10/0525 , C30B13/28 , C30B29/30 , C01G35/00
摘要: A solid electrolyte material having high ion conductivity and a all-solid-state lithium-ion secondary battery using this solid electrolyte material are provided. The solid electrolyte material has a garnet-related structure crystal represented by the chemical composition Li7−x−yLa3Zr2−x−yTaxNbyO12 (0.05≤x+y≤0.2, x≥0, y≥0), which belongs to an orthorhombic system and a space group belonging to Ibca. The solid electrolyte material has lithium-ion conductivity at 25° C. of at least 1.0×10−4 S/cm. Also, in this solid electrolyte material, the lattice constants are 1.29 nm≤a≤1.32 nm, 1.26 nm≤b≤1.29 nm, and 1.29 nm≤c≤1.32 nm, and three 16f sites and one 8d site in the crystal structure are occupied by lithium-ions. The all-solid-state lithium-ion secondary battery has a positive electrode, a negative electrode, and a solid electrolyte, the solid electrolyte comprising this solid electrolyte material.
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公开(公告)号:US10807878B2
公开(公告)日:2020-10-20
申请号:US15753904
申请日:2016-08-19
发明人: Junji Akimoto , Naoki Hamao , Kunimitsu Kataoka
摘要: Provided is a complex oxide that has a space group I-43d, has a high hydrogen content, contains almost no impurity phase, exhibits almost no aluminum substitution in the structure thereof, and is suitable for proton conductivity. This complex oxide is represented by a chemical formula Li7-x-yHxLa3Zr2-yMyO12 (M represents Ta and/or Nb, 3.2
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公开(公告)号:US10669159B2
公开(公告)日:2020-06-02
申请号:US15753910
申请日:2016-08-19
发明人: Junji Akimoto , Naoki Hamao , Kunimitsu Kataoka
IPC分类号: C01G25/00 , H01B1/08 , H01B13/00 , H01M8/12 , H01M4/88 , H01M8/02 , C01F17/00 , C01G27/00 , H01M8/1016 , C01F17/32
摘要: Provided is a complex oxide that has a high hydrogen content, contains almost no impurity phase, and is suitable for proton conductivity. The complex oxide is represented by a chemical formula Li7-xHxLa3M2O12 (M represents Zr and/or Hf, and 3.2
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公开(公告)号:US10347912B2
公开(公告)日:2019-07-09
申请号:US15502452
申请日:2015-08-06
发明人: Kunimitsu Kataoka , Junji Akimoto
IPC分类号: C01G23/00 , H01M4/485 , H01M10/054 , H01M10/0525
摘要: Provided are a sodium ion secondary battery and a lithium ion secondary battery capable of undergoing a reversible large-capacity charge/discharge reaction. The sodium and lithium ion secondary batteries each have a positive electrode, a negative electrode, and an electrolyte. The active substance of the positive or negative electrode of these secondary batteries is a single-phase polycrystal represented by the following chemical formula: NaxTi4O9 (2≤x≤3), preferably Na2Ti4O9, having a one-dimensional tunnel type structure, and belonging to a monoclinic crystal system. This polycrystal is obtained by filling a container made of molybdenum or the like with a raw material containing a sodium compound and at least one of a titanium compound and metal titanium, and firing at 800° C. or more but 1600° C. or less.
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公开(公告)号:US11139504B2
公开(公告)日:2021-10-05
申请号:US16897119
申请日:2020-06-09
发明人: Kunimitsu Kataoka , Junji Akimoto
IPC分类号: H01M10/0562 , H01M10/0525 , H01M10/0585 , H01B1/08 , H01B1/12 , C01G25/00 , C01G35/00
摘要: To provide a lithium ion conductive crystal body having a high density and a large length and an all-solid state lithium ion secondary battery containing the lithium ion conductive crystal body. A Li5La3Ta2O12 crystal body, which is one example of the lithium ion conductive crystal body, has a relative density of 99% or more, belongs to a cubic system, has a garnet-related type structure, and has a length of 2 cm or more. The Li5La3Ta2O12 crystal body is grown by a melting method employing a Li5La3Ta2O12 polycrystal body as a raw material. With the growing method, a Li5La3Ta2O12 crystal body having a relative density of 100% can also be obtained. In addition, the all-solid state lithium ion secondary battery has a positive electrode, a negative electrode, and a solid electrolyte, in which the solid electrolyte contains the lithium ion conductive crystal body.
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公开(公告)号:US10566655B2
公开(公告)日:2020-02-18
申请号:US15776229
申请日:2016-12-26
IPC分类号: H01M10/0525 , H01M10/0562 , C01G35/00 , C01G33/00
摘要: There are provided a solid electrolyte material having high density and ion conductivity, and an all solid lithium ion secondary battery using the solid electrolyte material. The solid electrolyte material has a garnet-related structure which has a chemical composition represented by Li7-x-yLa3Zr2-x-yTaxNbyO12 (0≤x≤0.8, 0.2≤y≤1, and 0.2≤x+y≤1) and relative density of 99% or greater, and belongs to a cubic system. The solid electrolyte material has lithium ion conductivity which is equal to or greater than 1.0×10−3 S/cm. The solid electrolyte material has a lattice constant a which satisfies 1.28 nm≤a≤1.30 nm, and has a lithium ion which occupies only two or more 96h sites in a crystal structure. The all solid lithium ion secondary battery includes a positive electrode, a negative electrode, and a solid electrolyte. The solid electrolyte includes the solid electrolyte material.
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