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    SECONDARY BATTERY
    1.
    发明申请
    SECONDARY BATTERY 审中-公开

    公开(公告)号：US20190305375A1

    公开(公告)日：2019-10-03

    申请号：US16360637

    申请日：2019-03-21

    Applicant: SANYO Electric Co., Ltd. ,  Panasonic Corporation

    Inventor： Yukitoshi Uehara ,  Kouhei Tuduki ,  Yoshikazu Miyachi ,  Shinya Miyazaki

    IPC: H01M10/0569 ,  H01M4/583 ,  H01M4/48 ,  H01M4/36

    Abstract: A secondary battery having a suppressed decrease in capacity, even through rapid charging, includes: a positive electrode; a negative electrode including a negative electrode current collector and a negative electrode active material layer formed thereon containing a carbon material and silicon compounds; and an electrolyte solution containing nonaqueous solvents including 10 volume % or more of fluoroethylene carbonate. When: a surface of the negative electrode active material layer that faces the negative electrode current collector and the back side thereof are set as first and second surfaces, respectively; a thickness of the negative electrode active material layer is set as T; and regions from the first and the second surfaces to a depth of 0.5T are set as lower and upper layer portions, respectively, mass M1 of the silicon compounds in the lower layer portion is larger than mass M2 of the silicon compounds in the upper layer portion.

    Secondary battery
    2.
    发明授权
    Secondary battery 有权

    公开(公告)号：US11316202B2

    公开(公告)日：2022-04-26

    申请号：US16360637

    申请日：2019-03-21

    Applicant: SANYO Electric Co., Ltd. ,  Panasonic Corporation

    Inventor： Yukitoshi Uehara ,  Kouhei Tuduki ,  Yoshikazu Miyachi ,  Shinya Miyazaki

    IPC: H01M10/0569 ,  H01M4/583 ,  H01M4/48 ,  H01M4/36 ,  H01M4/02

    Abstract: A secondary battery having a suppressed decrease in capacity, even through rapid charging, includes: a positive electrode; a negative electrode including a negative electrode current collector and a negative electrode active material layer formed thereon containing a carbon material and silicon compounds; and an electrolyte solution containing nonaqueous solvents including 10 volume % or more of fluoroethylene carbonate. When: a surface of the negative electrode active material layer that faces the negative electrode current collector and the back side thereof are set as first and second surfaces, respectively; a thickness of the negative electrode active material layer is set as T; and regions from the first and the second surfaces to a depth of 0.5T are set as lower and upper layer portions, respectively, mass M1 of the silicon compounds in the lower layer portion is larger than mass M2 of the silicon compounds in the upper layer portion.

    Nonaqueous electrolyte secondary battery
    4.
    发明授权
    Nonaqueous electrolyte secondary battery 有权

    公开(公告)号：US10297826B2

    公开(公告)日：2019-05-21

    申请号：US15551843

    申请日：2016-02-18

    Applicant: SANYO Electric Co., Ltd.

    Inventor： Kouhei Tuduki ,  Atsushi Fukui

    IPC: H01M4/525 ,  H01M4/48 ,  H01M4/36 ,  H01M4/505 ,  H01M4/587 ,  H01M4/62 ,  H01M10/0525 ,  H01M4/58 ,  H01M4/52 ,  H01M10/052 ,  H01M4/02

    Abstract: It is an object of the present invention to provide a nonaqueous electrolyte secondary battery with improved output characteristics. An example of an embodiment of the present invention provides a nonaqueous electrolyte secondary battery comprising an electrode assembly having a structure in which a positive electrode plate and a negative electrode plate are stacked with a separator therebetween. The positive electrode plate contains a lithium transition metal oxide containing tungsten as a positive electrode active material and also contains a phosphate compound. The negative electrode plate contains a graphitic carbon material and an amorphous/noncrystalline carbon material as negative electrode active materials and includes a coating of tungsten or a tungsten compound on the surface of the amorphous/noncrystalline carbon material.

    NEGATIVE ELECTRODE ACTIVE MATERIAL FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERIES
    6.
    发明申请
    NEGATIVE ELECTRODE ACTIVE MATERIAL FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERIES 审中-公开
    用于非电解电解质二次电池的负极电极活性材料

    公开(公告)号：US20160336586A1

    公开(公告)日：2016-11-17

    申请号：US15112793

    申请日：2015-01-22

    Applicant: SANYO ELECTRIC CO., LTD.

    Inventor： Kouhei Tuduki ,  Ayano Toyoda ,  Atsushi Fukui ,  Taizou Sunano

    IPC: H01M4/134 ,  H01M4/62 ,  H01M4/38 ,  H01M10/0525 ,  H01M4/36

    CPC classification number: H01M4/134 ,  H01M4/366 ,  H01M4/386 ,  H01M4/62 ,  H01M10/0525 ,  H01M2004/027

    Abstract: Provided is a negative electrode active material, containing at least silicon, for nonaqueous electrolyte secondary batteries. Since the negative electrode active material contains silicon, the negative electrode active material has high capacity and excellent cycle characteristics. A negative electrode active material for nonaqueous electrolyte secondary batteries contains at least silicon. At least, one portion of the surface of each of primary particles containing silicon is covered with an inert phase made of a silicon compound with a silicon oxidation number higher than that of the silicon, a metal-silicon alloy, or metal. The primary particles containing silicon may form secondary particles. The silicon compound with a silicon oxidation number higher than that of silicon is preferably Li2Si2O5, Li2SiO3, or Li4SiO4. Furthermore, the metal-silicon alloy is preferably FeSi and the metal is preferably Ti. Furthermore, the crystallite size of silicon is 500 Å or less.

    Abstract translation: 提供一种负极活性物质，至少含有硅，用于非水电解质二次电池。 由于负极活性物质含有硅，因此负极活性物质具有高容量和优异的循环特性。 非水电解质二次电池用负极活性物质至少含有硅。 至少有一部分含有硅的一次粒子的表面被硅氧化数高于硅，金属硅合金或金属的硅化合物制成的惰性相覆盖。 含硅的初级颗粒可以形成二次颗粒。 硅氧化数高于硅的硅化合物优选为Li 2 Si 2 O 5，Li 2 SiO 3或Li 4 SiO 4。 此外，金属 - 硅合金优选为FeSi，金属优选为Ti。 此外，硅的微晶尺寸为500以下。

    NEGATIVE ELECTRODE ACTIVE MATERIAL FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERIES AND NONAQUEOUS ELECTROLYTE SECONDARY BATTERY
    8.
    发明申请
    NEGATIVE ELECTRODE ACTIVE MATERIAL FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERIES AND NONAQUEOUS ELECTROLYTE SECONDARY BATTERY 有权
    非电解电解质二次电池和非电解电解质二次电池的负极电极活性材料

    公开(公告)号：US20150380735A1

    公开(公告)日：2015-12-31

    申请号：US14769233

    申请日：2014-03-24

    Applicant: SANYO ELECTRIC CO., LTD.

    Inventor： Kouhei Tuduki ,  Fukui Atsushi ,  Taizou Sunano

    IPC: H01M4/38 ,  H01M10/0525

    CPC classification number: H01M4/386 ,  H01M4/366 ,  H01M4/5825 ,  H01M10/0525 ,  H01M2220/30

    Abstract: The invention provides a nonaqueous electrolyte secondary battery having a large battery capacity and excellent charge/discharge cycle characteristics. The nonaqueous electrolyte secondary battery includes a negative electrode including a particulate negative electrode active material (33), a positive electrode and a nonaqueous electrolyte. The particulate negative electrode active material (33) includes a plurality of two-phase regions (34) in the particle wherein the two-phase regions include a first phase (A) containing silicon and a second phase (B) containing silicon oxide disposed on the periphery of the first phase, the negative electrode active material being such that the ratio of the intensity at 480 cm−1 wavelength to the intensity at 510 cm−1 wavelength in a Raman spectrum obtained by Raman spectroscopy is not more than 0.1 and the ratio of the intensity at 2θ=21.6 to the intensity at 2θ=28.4 in an X-ray diffraction pattern obtained by X-ray diffractometry is not more than 0.1.

    Abstract translation: 本发明提供一种电池容量大，充放电循环特性优异的非水电解质二次电池。 非水电解质二次电池包括含有负极活性物质（33），正极和非水电解质的负极。 颗粒状负极活性物质（33）在颗粒中包含多个两相区域（34），其中两相区域包括含有硅的第一相（A）和含有氧化硅的第二相（B） 第一相的周围，负极活性物质使得通过拉曼光谱法获得的拉曼光谱中480cm -1波长的强度与510cm -1波长的强度的比例不大于0.1，并且 2θ时的强度比= 21.6，2θ时的强度比= 28.4，X射线衍射法得到的X射线衍射图中的强度比不大于0.1。

    Positive electrode for nonaqueous electrolyte secondary batteries and nonaqueous electrolyte secondary battery
    9.
    发明授权
    Positive electrode for nonaqueous electrolyte secondary batteries and nonaqueous electrolyte secondary battery 有权

    公开(公告)号：US10319986B2

    公开(公告)日：2019-06-11

    申请号：US15525353

    申请日：2015-11-18

    Applicant: Sanyo Electric Co., Ltd.

    Inventor： Kouhei Tuduki ,  Atsushi Fukui

    IPC: H01M4/02 ,  H01M4/04 ,  H01M4/36 ,  H01M4/62 ,  H01M4/131 ,  H01M4/505 ,  H01M4/525 ,  H01M10/052 ,  H01M4/1391

    Abstract: A positive electrode for nonaqueous electrolyte secondary batteries includes a positive electrode current collector and a positive electrode mix layer, formed on the current collector, containing a positive electrode active material. The positive electrode active material mainly contains a lithium transition metal oxide in which the molar ratio of nickel (Ni) to a transition metal component is 20% or more. The positive electrode mix layer contains a plurality of pores and has a first peak of a logarithmic differential pore volume distribution (dV/dlogD) that appears in the range where the pore diameter D is less than 1 μm and a second peak of the logarithmic differential pore volume distribution (dV/dlogD) that appears in the range where the pore diameter D is 1 μm or more in a pore distribution determined by mercury intrusion porosimetry. According to this configuration, a nonaqueous electrolyte secondary battery having excellent output characteristics can be provided.

    Negative electrode active material for nonaqueous electrolyte secondary batteries and nonaqueous electrolyte secondary battery
    10.
    发明授权
    Negative electrode active material for nonaqueous electrolyte secondary batteries and nonaqueous electrolyte secondary battery 有权

    公开(公告)号：US10205165B2

    公开(公告)日：2019-02-12

    申请号：US14769233

    申请日：2014-03-25

    Applicant: SANYO Electric Co., Ltd.

    Inventor： Kouhei Tuduki ,  Fukui Atsushi ,  Taizou Sunano

    IPC: H01M4/36 ,  H01M4/38 ,  H01M4/58 ,  H01M10/0525

    Abstract: The invention provides a nonaqueous electrolyte secondary battery having a large battery capacity and excellent charge/discharge cycle characteristics. The nonaqueous electrolyte secondary battery includes a negative electrode including a particulate negative electrode active material (33), a positive electrode and a nonaqueous electrolyte. The particulate negative electrode active material (33) includes a plurality of two-phase regions (34) in the particle wherein the two-phase regions include a first phase (A) containing silicon and a second phase (B) containing silicon oxide disposed on the periphery of the first phase, the negative electrode active material being such that the ratio of the intensity at 480 cm−1 wavelength to the intensity at 510 cm−1 wavelength in a Raman spectrum obtained by Raman spectroscopy is not more than 0.1 and the ratio of the intensity at 2θ=21.6 to the intensity at 2θ=28.4 in an X-ray diffraction pattern obtained by X-ray diffractometry is not more than 0.1.

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