知搜-全球专利检索

  1. Login
  2. Sign Up

Search Results

7 records (took 0.03 seconds)

    NONAQUEOUS ELECTROLYTE SECONDARY BATTERY
    2.
    发明公开
    NONAQUEOUS ELECTROLYTE SECONDARY BATTERY 审中-公开

    公开(公告)号：US20230290939A1

    公开(公告)日：2023-09-14

    申请号：US18032431

    申请日：2021-10-29

    Applicant: Panasonic Intellectual Property Management Co., Ltd.

    Inventor： Yuji Goshima ,  Yuta Kuroda ,  Fumiharu Niina ,  Tatsuro Sasa

    IPC: H01M4/38 ,  H01M4/134

    CPC classification number: H01M4/386 ,  H01M4/134

    Abstract: A nonaqueous electrolyte secondary battery according to one embodiment of the present disclosure is provided with a positive electrode, a negative electrode and a nonaqueous electrolyte, while being characterized in that: the negative electrode comprises a negative electrode active material that contains an Si-containing material; the Si-containing material contains a first Si-containing material which comprises a silicate phase and silicon particles that are dispersed in the silicate phase, and a second Si-containing material which comprises a carbon phase and silicon particles that are dispersed in the carbon phase; and the difference between the initial charge/discharge efficiency (Efc) of the positive electrode and the initial charge/discharge efficiency (Efa) of the negative electrode, namely (Efc−Efa) satisfies 1%

    POSITIVE ELECTRODE ACTIVE SUBSTANCE FOR NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY, AND POSITIVE ELECTRODE FOR NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY
    3.
    发明申请
    POSITIVE ELECTRODE ACTIVE SUBSTANCE FOR NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY, AND POSITIVE ELECTRODE FOR NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY 有权

    公开(公告)号：US20220246911A1

    公开(公告)日：2022-08-04

    申请号：US17610386

    申请日：2020-03-09

    Applicant: Panasonic Intellectual Property Management Co., Ltd.

    Inventor： Yuji Goshima ,  Takeshi Ogasawara ,  Akihiro Kawakita

    IPC: H01M4/36 ,  H01M4/505 ,  H01M4/525

    Abstract: This positive electrode active substance for a non-aqueous electrolyte secondary battery contains: a lithium-containing transition metal oxide having secondary particles formed by aggregation of primary particles; and at least a tungsten compound and a boron compound that are present between primary particles. The present invention is characterized in that: the amount of tungsten element eluted when the positive electrode active substance is washed for 5 minutes with a 0.01 mol/L aqueous solution of sodium hydroxide is 60% or less of the amount of tungsten element detected when the positive electrode active substance is dissolved in a mixed acid containing hydrofluoric acid, nitric acid and hydrochloric acid; and the amount of boron element eluted when the positive electrode active substance is washed for 1 minute with ion exchanged water is 80% or more of the amount of boron element detected when the positive electrode active substance is dissolved in hydrochloric acid.

    METHOD FOR PRODUCING POSITIVE ELECTRODE ACTIVE SUBSTANCE FOR NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY
    5.
    发明申请
    METHOD FOR PRODUCING POSITIVE ELECTRODE ACTIVE SUBSTANCE FOR NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY 有权

    公开(公告)号：US20220033276A1

    公开(公告)日：2022-02-03

    申请号：US17430881

    申请日：2020-01-21

    Applicant: Panasonic Intellectual Property Management Co., Ltd.

    Inventor： Akihiro Kawakita ,  Takeshi Ogasawara ,  Yuji Goshima

    IPC: C01G53/00 ,  H01M4/525 ,  H01M10/0525

    Abstract: A method for producing a positive electrode active substance for a non-aqueous electrolyte secondary battery is characterized by including: a washing step for washing a lithium-containing transition metal oxide with water and then dehydrating the same so as to obtain a cake-like composition; a tungsten addition step for adding at least a tungsten compound or a tungsten-containing solution to the cake-like composition so as to obtain a tungsten-added product; a first heat treatment step for heat treating the tungsten-added product at a temperature of 180° C. or lower; and a second heat treatment step for heat treating the tungsten-added product in an atmosphere other than a reducing atmosphere at a temperature of higher than 180° C. to 330° C. This method is further characterized by including a boron addition step for adding a boron compound or a boron-containing solution to the cake-like composition.

    NONAQUEOUS ELECTROLYTE SECONDARY BATTERY
    7.
    发明公开
    NONAQUEOUS ELECTROLYTE SECONDARY BATTERY 审中-公开

    公开(公告)号：US20230378438A1

    公开(公告)日：2023-11-23

    申请号：US18027282

    申请日：2021-09-14

    Applicant: Panasonic Intellectual Property Management Co., Ltd.

    Inventor： Yuji Tani ,  Yuji Goshima ,  Fumiharu Niina

    IPC: H01M4/36 ,  H01M4/133 ,  H01M4/137

    CPC classification number: H01M4/364 ,  H01M4/133 ,  H01M4/137 ,  H01M2004/027

    Abstract: This nonaqueous electrolyte secondary battery comprises a positive electrode, a negative electrode, and a nonaqueous electrolyte. The negative electrode includes a negative electrode core and a negative electrode mixture layer formed on at least one surface of the negative electrode core. The ratio (E1/E2) of the charging expansion rate (E1) to the discharge expansion rate (E2) of the negative electrode is at least 1.05 and less than 1.15. The content of silicon material with respect to the mass of a negative electrode active material in the negative electrode mixture layer is 3-12 mass %. Graphite, a first silicon material (SiO), and a second silicon material (LSX) are preferably included as the negative electrode active material in the negative electrode mixture layer.

Patent Agency Ranking