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    Negative electrode for non-aqueous electrolyte secondary battery, and non-aqueous electrolyte secondary battery
    1.
    发明授权
    Negative electrode for non-aqueous electrolyte secondary battery, and non-aqueous electrolyte secondary battery 有权

    公开(公告)号：US10263252B2

    公开(公告)日：2019-04-16

    申请号：US15318103

    申请日：2015-08-27

    Applicant: SANYO Electric Co., Ltd.

    Inventor： Na Wang ,  Shinji Kasamatsu ,  Yoshio Kato

    IPC: H01M4/133 ,  H01M4/38 ,  H01M4/48 ,  H01M4/587 ,  H01M10/0525 ,  H01M4/134 ,  H01M4/36 ,  H01M4/485 ,  H01M10/052 ,  H01M4/02

    Abstract: A non-aqueous electrolyte secondary battery including a silicon material as a negative electrode active material has good discharge rate characteristics. A negative electrode according to an exemplary embodiment includes a negative-electrode current collector and a negative-electrode mixture layer formed on the current collector. The negative-electrode mixture layer contains graphite and a silicon material. A first region that extends from the surface of the mixture layer remote from the negative-electrode current collector in the thickness direction of the negative-electrode mixture layer and has a thickness equal to 40% of the thickness of the mixture layer contains a larger amount of the silicon material than a second region that extends from the surface of the mixture layer adjacent to the negative-electrode current collector and has a thickness equal to 40% of the thickness of the mixture layer. The first region has a lower density than the second region.

    NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY
    2.
    发明申请
    NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY 有权

    公开(公告)号：US20220376258A1

    公开(公告)日：2022-11-24

    申请号：US17771280

    申请日：2020-10-19

    Applicant: SANYO Electric Co., Ltd.

    Inventor： Na Wang ,  Daisuke Ikeda ,  Kentaro Takahashi

    IPC: H01M4/62 ,  H01M10/0587 ,  H01M4/583 ,  H01M4/133

    Abstract: This non-aqueous electrolyte secondary battery is provided with: an electrode body that has a positive electrode and a negative electrode; and an outer package in which the electrode body is accommodated. The negative electrode comprises a negative electrode core body and a negative electrode mixture layer formed on the surface of the negative electrode core body. The negative electrode mixture layer comprises: a negative electrode active material that has a tap density of 1.00-1.20 g/cm3; CMC, the content of which accounts for 0.6-0.8 mass % in the negative electrode mixture layer; and SBR, the content of which accounts for 0.4-0.8 mass % in the negative electrode mixture layer. The mass ratio of the content of CMC to the content of SBR in the negative electrode mixture layer is less than 2, and the total content of CMC and SBR in the negative electrode mixture layer is less than 1.5 mass %.

    Negative electrode for non-aqueous electrolyte secondary battery
    4.
    发明授权
    Negative electrode for non-aqueous electrolyte secondary battery 有权

    公开(公告)号：US10319993B2

    公开(公告)日：2019-06-11

    申请号：US15108097

    申请日：2014-12-19

    Applicant: SANYO Electric Co., Ltd.

    Inventor： Na Wang ,  Shinji Kasamatsu ,  Yoshio Kato

    IPC: H01M4/36 ,  H01M4/48 ,  H01M4/58 ,  H01M4/583 ,  H01M4/587 ,  H01M10/056 ,  H01M10/0525 ,  H01M4/134 ,  H01M4/62 ,  H01M4/38 ,  H01M4/133 ,  H01M4/02

    Abstract: Gas evolution during the high-temperature storage of a non-aqueous electrolyte secondary battery is suppressed to improve the high-temperature storage characteristics of the non-aqueous electrolyte secondary battery. A negative electrode for a non-aqueous electrolyte secondary battery contains silicon-containing particles and graphite particles. A covering layer is disposed on each of the graphite particles. The covering layer contains a first covering material and a second covering material, the first covering material containing particles that can be made to swell with a non-aqueous electrolytic solution, the second covering material containing a water-soluble polymer material. The first covering material is disposed on a surface of each of the graphite particles. The mass ratio of the second covering material to the first covering material is higher than 1.

    NEGATIVE ELECTRODE FOR NON-AQUEOUS ELECTROLYTE SECONDARY CELL
    5.
    发明申请
    NEGATIVE ELECTRODE FOR NON-AQUEOUS ELECTROLYTE SECONDARY CELL 审中-公开
    用于非水电解质二次电池的负极

    公开(公告)号：US20160344033A1

    公开(公告)日：2016-11-24

    申请号：US15108060

    申请日：2014-12-12

    Applicant: SANYO ELECTRIC CO., LTD.

    Inventor： Shinji Kasamatsu ,  Na Wang ,  Yoshio Kato

    IPC: H01M4/62 ,  H01M10/0525 ,  H01M4/38 ,  H01M4/583 ,  H01M4/133 ,  H01M4/134

    CPC classification number: H01M4/622 ,  H01M4/133 ,  H01M4/134 ,  H01M4/386 ,  H01M4/583 ,  H01M4/587 ,  H01M4/621 ,  H01M10/0525

    Abstract: Adhesion between particles in a negative electrode for non-aqueous secondary cells is improved for better cycle characteristics. A negative electrode for non-aqueous secondary cells contains silicon-containing particles and graphite particles as negative electrode active materials. The graphite particles have a first coating layer that contains carboxymethyl cellulose, and the first coating layer has an average thickness of 10 nm or more. The silicon-containing particles have a second coating layer that contains carboxymethyl cellulose, and the second coating layer has an average thickness of 10 nm or more.

    Abstract translation: 改善非水性二次电池用负极中的颗粒之间的附着力，以获得更好的循环特性。 非水系二次电池用负极含有含硅粒子和石墨粒子作为负极活性物质。 石墨颗粒具有包含羧甲基纤维素的第一涂层，第一涂层的平均厚度为10nm以上。 含硅颗粒具有包含羧甲基纤维素的第二涂层，第二涂层的平均厚度为10nm以上。

    Non-aqueous electrolyte secondary battery
    6.
    发明授权
    Non-aqueous electrolyte secondary battery 有权

    公开(公告)号：US10483525B2

    公开(公告)日：2019-11-19

    申请号：US15558307

    申请日：2016-03-09

    Applicant: SANYO ELECTRIC CO., LTD.

    Inventor： Shinji Kasamatsu ,  Na Wang

    IPC: H01M4/13 ,  H01M4/134 ,  H01M4/60 ,  H01M4/583 ,  H01M4/62 ,  H01M4/133 ,  H01M4/36 ,  C08F220/56 ,  C08K3/04 ,  C08K3/36 ,  H01M4/38 ,  H01M4/02 ,  H01M10/052

    Abstract: A non-aqueous electrolyte secondary battery having a long cycle life and generates a small amount of gas during, for example, storage in a charged state. A negative electrode in a non-aqueous electrolyte secondary battery according to an exemplary embodiment includes a negative electrode current collector and a negative electrode mixture layer formed on the negative electrode current collector. The negative electrode mixture layer contains a water-soluble polymer and a negative electrode active material containing a silicon-based active material. The water-soluble polymer contains 0.30 mol/100 g or more and 0.40 mol/100 g or less of an acrylic acid monomer unit and 10−4 mol/100 g or more and 10−3 mol/100 g or less of a tetrafunctional (meth)acrylate monomer unit. An aqueous solution containing 1% by mass of the polymer in terms of solid content has a viscosity of 0.05 Pa·s or higher and 0.70 Pa·s or lower.

    NEGATIVE ELECTRODE FOR NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY
    7.
    发明申请
    NEGATIVE ELECTRODE FOR NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY 审中-公开
    用于非水电解质二次电池的负极

    公开(公告)号：US20160329558A1

    公开(公告)日：2016-11-10

    申请号：US15108097

    申请日：2014-12-19

    Applicant: SANYO ELECTRIC CO., LTD.

    Inventor： Na Wang ,  Shinji Kasamatsu ,  Yoshio Kato

    IPC: H01M4/36 ,  H01M4/134 ,  H01M4/38 ,  H01M10/056 ,  H01M4/583 ,  H01M4/62 ,  H01M10/0525 ,  H01M4/133 ,  H01M4/48

    CPC classification number: H01M4/364 ,  H01M4/133 ,  H01M4/134 ,  H01M4/366 ,  H01M4/386 ,  H01M4/483 ,  H01M4/583 ,  H01M4/587 ,  H01M4/62 ,  H01M4/622 ,  H01M10/0525 ,  H01M10/056 ,  H01M2004/027 ,  H01M2300/002

    Abstract: Gas evolution during the high-temperature storage of a non-aqueous electrolyte secondary battery is suppressed to improve the high-temperature storage characteristics of the non-aqueous electrolyte secondary battery. A negative electrode for a non-aqueous electrolyte secondary battery contains silicon-containing particles and graphite particles. A covering layer is disposed on each of the graphite particles. The covering layer contains a first covering material and a second covering material, the first covering material containing particles that can be made to swell with a non-aqueous electrolytic solution, the second covering material containing a water-soluble polymer material. The first covering material is disposed on a surface of each of the graphite particles. The mass ratio of the second covering material to the first covering material is higher than 1.

    Abstract translation: 抑制非水电解质二次电池的高温保存期间的气体逸出，提高非水电解质二次电池的高温保存特性。 非水电解质二次电池用负极含有含硅粒子和石墨粒子。 覆盖层设置在每个石墨颗粒上。 覆盖层包含第一覆盖材料和第二覆盖材料，第一覆盖材料含有可以用非水电解液溶胀的颗粒，第二覆盖材料含有水溶性聚合物材料。 第一覆盖材料设置在每个石墨颗粒的表面上。 第二覆盖材料与第一覆盖材料的质量比高于1。

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