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    POSITIVE ACTIVE MATERIAL FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERY, METHOD FOR PRODUCING SAME, ELECTRODE FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERY, AND NONAQUEOUS ELECTROLYTE SECONDARY BATTERY
    14.
    发明申请
    POSITIVE ACTIVE MATERIAL FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERY, METHOD FOR PRODUCING SAME, ELECTRODE FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERY, AND NONAQUEOUS ELECTROLYTE SECONDARY BATTERY 审中-公开

    公开(公告)号：US20180145318A1

    公开(公告)日：2018-05-24

    申请号：US15576079

    申请日：2016-05-27

    Applicant: GS Yuasa International Ltd.

    Inventor： Daisuke ENDO ,  Hiromasa MURAMATSU

    IPC: H01M4/505 ,  H01M4/525 ,  H01M10/052

    Abstract: Provided is a positive active material for a nonaqueous electrolyte secondary battery which includes a lithium transition metal composite oxide. A molar ratio (Li/Me) of Li and a transition metal (Me) that form the lithium transition metal composite oxide is more than 1. The transition metal (Me) includes Mn, Ni and Co. The lithium transition metal composite oxide has an α-NaFeO2-type crystal structure, an X-ray diffraction pattern attributable to a space group R3-m, and a full width at half maximum (FWHM (104)) for the diffraction peak of the (104) plane at a Miller index hkl in X-ray diffraction measurement using a CuKα ray of 0.21° or more and 0.55° or less. A ratio (FWHM (003)/FWHM (104)) of a full width at half maximum for the diffraction peak of the (003) plane and the full width at half maximum for the diffraction peak of the (104) plane at the Miller index hkl is 0.72 or less. Particles of the lithium transition metal composite oxide have a peak differential pore volume of 0.33 mm3/(g·nm) or less.

    METHOD FOR PRODUCING ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY AND METHOD OF USING LITIUM SECONDARY BATTERY
    16.
    发明申请
    METHOD FOR PRODUCING ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY AND METHOD OF USING LITIUM SECONDARY BATTERY 审中-公开
    用于生产锂二次电池的活性材料的方法和使用锂二次电池的方法

    公开(公告)号：US20140059845A1

    公开(公告)日：2014-03-06

    申请号：US13629001

    申请日：2012-09-27

    Applicant: GS YUASA INTERNATIONAL LTD.

    Inventor： Daisuke ENDO ,  Miki YASUTOMI ,  Yoshihiro KATAYAMA ,  Toshiyuki NUKUDA

    IPC: H01M4/04 ,  H02J7/00

    CPC classification number: H01M4/0445 ,  C01G45/1228 ,  C01G51/42 ,  C01G51/50 ,  C01G53/50 ,  C01P2002/50 ,  C01P2002/72 ,  C01P2002/74 ,  C01P2002/77 ,  C01P2004/82 ,  C01P2006/40 ,  H01M4/505 ,  H01M4/525 ,  H01M10/052 ,  H01M10/446 ,  H02J7/00 ,  Y10T29/49108

    Abstract: A lithium secondary battery is produced by employing a charging method where a positive electrode upon charging has a maximum achieved potential of 4.3 V (vs. Li/Li+) or lower. The lithium secondary battery contains an active material including a solid solution of a lithium transition metal composite oxide having an α-NaFeO2-type crystal structure. The solid solution has a diffraction peak observed near 20 to 30° in X-ray diffractometry using CuKα radiation for a monoclinic Li[Li1/3Mn2/3]O2-type before charge-discharge. The lithium secondary battery is charged to reach at least a region with substantially flat fluctuation of potential appearing in a positive electrode potential region exceeding 4.3 V (vs. Li/Li+) and 4.8 V (vs. Li/Li+) or lower. A dischargeable electric quantity in a potential region of 4.3 V (vs. Li/Li+) or lower is 177 mAh/g or higher.

    Abstract translation: 通过采用充电方法制造锂二次电池，其中充电时的正极的最大实现电位为4.3V（相对于Li / Li +）以下。 锂二次电池含有具有α-NaFeO 2型晶体结构的锂过渡金属复合氧化物的固溶体的活性物质。 固体溶液在使用CuKalpha辐射的X射线衍射法中观察到的衍射峰接近20〜30°，在单次Li / LiNi / LiNiO3 / LiNi2O3型充电 - 放电之前。 锂二次电池被充电至少达到在超过4.3V（相对于Li / Li +）和4.8V（相对于Li / Li +）以下的正电极电位区域中出现的具有基本平坦的电位变动的区域。 4.3V（相对于Li / Li +）以下的电位区域的可放电电量为177mAh / g以上。

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