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    NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY
    31.
    发明申请
    NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY 有权
    非水电解质二次电池

    公开(公告)号：US20140106225A1

    公开(公告)日：2014-04-17

    申请号：US14107713

    申请日：2013-12-16

    Applicant: KABUSHIKI KAISHA TOSHIBA

    Inventor： Shinsuke MATSUNO ,  Dai Yamamoto ,  Hideki Satake ,  Norio Takami

    IPC: H01M4/136 ,  H01M4/485 ,  H01M4/58

    CPC classification number: H01M4/136 ,  H01M2/023 ,  H01M4/366 ,  H01M4/485 ,  H01M4/5825 ,  H01M10/0525 ,  Y02E60/122 ,  Y02T10/7011

    Abstract: A non-aqueous electrolyte secondary battery includes a positive electrode containing active material particles composed of a core section formed of olivine type LiFePO4; an intermediate section that lies on the outer side of the core section and has LiFexPyOz; and a surface section that lies on the outer side of the intermediate section and has LiFeaPbOc; and a negative electrode containing lithium titanate, in which battery the molar concentration ratio of Fe relative to P at the core section is greater than the average of x/y of LiFexPyOz, the average value of a/b of LiFeaPbOc at the surface section of the positive electrode active material particles is smaller than the average of x/y of LiFexPyOz, and the positive electrode active material particles include a region in which x/y of LiFexPyOz at the intermediate section increases continuously or intermittently in the direction from the surface section toward the core section.

    Abstract translation: 非水电解质二次电池包括含有由橄榄石型LiFePO 4形成的芯部构成的活性物质粒子的正极; 位于所述芯部的外侧并具有LiFexPyOz的中间部; 以及位于中间部分的外侧并具有LiFeaPbOc的表面部分; 以及含有钛酸锂的负极，其中电池在铁芯部分的Fe相对于P的摩尔浓度比大于LiFexPyOz的x / y的平均值，LiFeaPbOc在表面的平均值a / b的平均值 正极活性物质粒子小于LiFexPyOz的x / y的平均值，正极活性物质粒子包括其中在中间部分的x / y的LiFexPyOz在表面部分的方向上连续或间歇地增加的区域 朝核心部分。

    ELECTRODE GROUP, SECONDARY BATTERY, BATTERY PACK, VEHICLE, AND STATIONARY POWER SUPPLY
    34.
    发明申请
    ELECTRODE GROUP, SECONDARY BATTERY, BATTERY PACK, VEHICLE, AND STATIONARY POWER SUPPLY 有权

    公开(公告)号：US20220294077A1

    公开(公告)日：2022-09-15

    申请号：US17446864

    申请日：2021-09-03

    Applicant: Kabushiki Kaisha Toshiba

    Inventor： Yasuyuki HOTTA ,  Takashi KUBOKI ,  Shinsuke MATSUNO ,  Norio TAKAMI

    IPC: H01M50/446 ,  H01M50/431 ,  H01M50/426

    Abstract: An electrode group includes a negative electrode, a positive electrode and a separator. The negative electrode includes a negative electrode active material-containing layer and a mesh negative electrode current collector. The positive electrode includes a positive electrode active material-containing layer. The separator includes a composite membrane containing inorganic solid particles and a polymer material. At least one of a first polymer material constituting the negative electrode active material-containing layer is the same as a second polymer material. A ratio a/b of denseness a and denseness b is greater than 1.05. A peeling strength σ1 is greater than a peeling strength σ2. An air permeability coefficient of a joined body of the composite membrane and the negative electrode is 1×10−19 m2 or more and 1×10−15 m2 or less.

    SECONDARY BATTERY, BATTERY PACK, VEHICLE, AND STATIONARY POWER SUPPLY
    38.
    发明申请
    SECONDARY BATTERY, BATTERY PACK, VEHICLE, AND STATIONARY POWER SUPPLY 审中-公开

    公开(公告)号：US20190296344A1

    公开(公告)日：2019-09-26

    申请号：US16118967

    申请日：2018-08-31

    Applicant: KABUSHIKI KAISHA TOSHIBA

    Inventor： Hayato SEKI ,  Yumiko SEKIGUCHI ,  Kazuomi YOSHIMA ,  Yasuyuki HOTTA ,  Shinsuke MATSUNO ,  Norio TAKAMI

    IPC: H01M4/485 ,  H01M10/42 ,  B60L11/18

    Abstract: According to one embodiment, provided is a secondary battery including an aqueous electrolyte, a positive electrode, and a negative electrode, where the negative electrode includes a negative electrode active material containing a Ti-containing composite oxide. At least one element A selected from the group consisting of Hg, Pb, Zn, and Bi is present on a surface of the negative electrode. An average of molar ratios (A/(A+Ti)) of the element A is more than or equal to 5% and less than or equal to 40%. Each of the molar ratios is a molar amount of the element A to a sum between the molar amount of the element A and a molar amount of Ti on the surface of the negative electrode, according to scanning electron microscopy-energy dispersive X-ray spectroscopy.

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